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ST2L05
VERY LOW QUIESCENT CURRENT DUAL VOLTAGE REGULATOR
s s
s s s s s s s
s
s
s
VO1 = 1.5, 1.8, 2.5, 2.8, 3.0, 3.3V FIXED VO2 = 1.5, 1.8, 2.5, 2.8, 3.0, 3.3V FIXED OR ADJUSTABLE FROM 1.25 TO VI - VDROP GUARANTEED OUTPUT1 CURRENT: 1A GUARANTEED OUTPUT2 CURRENT: 1A 2% OUTPUT TOLERANCE (AT 25C) 3% OUTPUT TOLERANCE OVER TEMP. TYPICAL DROPOUT 1.1V (IO1 = IO2 = 1A) INTERNAL POWER AND THERMAL LIMIT STABLE WITH LOW ESR OUTPUT CAPACITOR OPERATING TEMPERATURE RANGE: 0C TO 125C VERY LOW QUIESCENT CURRENT: 7mA MAX OVER TEMP. AVAILABLE IN SPAK AND IN DFN 5x6mm PACKAGE
SPAK-5L
DFN
DESCRIPTION Specifically designed for data storage applications, this device integrates two voltage regulators, each one able to supply 1A and it is assembled in SPAK and in a new 8-PIN surface
mounting package named DFN 5x6mm at 8 pins. The first regulator block supplies 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, 3.3V depending on the chosen version. The second one may be fixed to the same values or adjustable from 1.25V to VI - VDROP that could power several kind of different micro-controllers. Both outputs are current limited and over temperature protected. It is worth underlining the very good thermal performance of the packages SPAK and DFN with only 2C/W of Thermal Resistance Junction to Case. Applications are HARD DISK, CD/DVD-ROM, CD/ DVD-R/RW, COMBO (DVD-ROM+CD-R/RW).
Figure 1: Block Diagram Of Fixed/adj Version
December 2004
Rev. 6
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Figure 2: Block Diagram Of Fixed/fixed Version
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Table 1: Order Codes
VO1 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.8 1.8 1.8 1.8 1.8 1.8 1.8 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.8 2.8 2.8 2.8 2.8 2.8 2.8 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.3 3.3 3.3 3.3 3.3 3.3 3.3 V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V VO2 1.5 V 1.8 V 2.5 V 2.8 V 3.0 V 3.3 V ADJ 1.5 V 1.8 V 2.5 V 2.8 V 3.0 V 3.3 V ADJ 1.5 V 1.8 V 2.5 V 2.8 V 3.0 V 3.3 V ADJ 1.5 V 1.8 V 2.5 V 2.8 V 3.0 V 3.3 V ADJ 1.5 V 1.8 V 2.5 V 2.8 V 3.0 V 3.3 V ADJ 1.5 V 1.8 V 2.5 V 2.8 V 3.0 V 3.3 V ADJ SPAK ST2L05R1515K5 (*) ST2L05R1518K5 (*) ST2L05R1525K5 (*) ST2L05R1528K5 (*) ST2L05R1530K5 (*) ST2L05R1533K5 (*) ST2L05R1500K5 (*) ST2L05R1815K5 (*) ST2L05R1818K5 (*) ST2L05R1825K5 (*) ST2L05R1828K5 (*) ST2L05R1830K5 (*) ST2L05R1833K5 (*) ST2L05R1800K5 (*) ST2L05R2515K5 (*) ST2L05R2518K5 (*) ST2L05R2525K5 (*) ST2L05R2528K5 (*) ST2L05R2530K5 (*) ST2L05R2533K5 (*) ST2L05R2500K5 (*) ST2L05R2815K5 (*) ST2L05R2818K5 (*) ST2L05R2825K5 (*) ST2L05R2828K5 (*) ST2L05R2830K5 (*) ST2L05R2833K5 (*) ST2L05R2800K5 (*) ST2L05R3015K5 (*) ST2L05R3018K5 (*) ST2L05R3025K5 (*) ST2L05R3028K5 (*) ST2L05R3030K5 (*) ST2L05R3033K5 (*) ST2L05R3000K5 (*) ST2L05R3315K5 (*) ST2L05R3318K5 (*) ST2L05R3325K5 (*) ST2L05R3328K5 (*) ST2L05R3330K5 (*) ST2L05R3333K5 (*) ST2L05R3300K5 DFN ST2L05R1515PS (*) ST2L05R1518PS (*) ST2L05R1525PS (*) ST2L05R1528PS (*) ST2L05R1530PS (*) ST2L05R1533PS (*) ST2L05R1500PS (*) ST2L05R1815PS (*) ST2L05R1818PS (*) ST2L05R1825PS (*) ST2L05R1828PS (*) ST2L05R1830PS (*) ST2L05R1833PS (*) ST2L05R1800PS (*) ST2L05R2515PS (*) ST2L05R2518PS (*) ST2L05R2525PS (*) ST2L05R2528PS (*) ST2L05R2530PS (*) ST2L05R2533PS (*) ST2L05R2500PS (*) ST2L05R2815PS (*) ST2L05R2818PS (*) ST2L05R2825PS (*) ST2L05R2828PS (*) ST2L05R2830PS (*) ST2L05R2833PS (*) ST2L05R2800PS (*) ST2L05R3015PS (*) ST2L05R3018PS (*) ST2L05R3025PS (*) ST2L05R3028PS (*) ST2L05R3030PS (*) ST2L05R3033PS (*) ST2L05R3000PS (*) ST2L05R3315PS (*) ST2L05R3318PS (*) ST2L05R3325PS ST2L05R3328PS (*) ST2L05R3330PS (*) ST2L05R3333PS (*) ST2L05R3300PS SHIPMENT (1) Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape Tape & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel & Reel
(*) Available on request. (1) For Tube Shipment, change "R" with "-" in the relevant ordering code, DFN is available only in Tape & Reel.
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Table 2: Absolute Maximum Ratings
Symbol VI PD IOSH Top Tstg TLEAD Operating Input Voltage Power Dissipation Short Circuit Output Current - 3.3 V and adjustable output Operating Junction Temperature Range Storage Temperature Range(*) Lead Temperature (Soldering) 10 Sec. Parameter Value 10 Internally Limited Internally Limited 0 to 150 -65 to 150 260 C C C Unit V
(*) Storage temperatures > 125C are only acceptable if the Dual Regulator is soldered to a PCBA. Absolute Maximum Ratings are those beyond which damage to the device may occur. Functional operation under these condition is not implied.
Table 3: Recommended Operating Conditions
Symbol VI VI tRISE tFALL Input Voltage Input Voltage Ripple Input Voltage Rise Time (from 10% to 90%) Input Voltage Fall Time (from 10% to 90%) Parameter Value 4.5 to 7 0.15 1 1 Unit V V sec sec
Table 4: Thermal Data
Symbol Rthj-case Rthj-amb Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient SPAK 2 26 DFN 2 36 Unit C/W C/W
Figure 3: Pin Connection (top view for SPAK, top through view for DFN8)
SPAK
DFN8
Table 5: Pin Description
SPAK 1 2 3 4 5 DFN 3 4 8 5 7 1, 2, 6 Symbol VI ADJ/N.C. GND VO2 VO1 NC Name and Function Bypass with a 4.7F capacitor to GND Resistor divider connection/Not Connected Ground Adjustable output voltage: bypass with a 4.7F capacitor to GND Fixed output voltage: bypass with a 4.7F capacitor to GND Not Connected
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Figure 4: Application Circuit Of Fixed/fixed Version
Figure 5: Application Circuit Of Fixed/adj Version
NOTE: The regulator is designed to be stable with either tantalum or ceramic capacitors on the input and outputs. The expected values of the input and output X7R ceramic capacitors are from 4.7F to 22F with 4.7F typical. The input capacitor must be connected within 0.5 inches of the VI terminal. The output capacitors must also be connected within 0.5 inches of output pins VO1 and VO2. There is no upper limit to the size of the input capacitor (for more details see the Application Hints section). NOTE: In the Fixed/ADJ version, the adjustable output voltage VO2 is designed to support output voltages from 1.25V to VI - VDROP. The adjustable output voltage VO2 is set by a resistor divider connected between VO2 (pin4) and Ground (pin3) with its centre tap connected to VO2 ADJ (pin2). The voltage divider resistors are: R1 connected to VO2 and VO2 ADJ and R2 connected to VO2 ADJ and GND. VO2 is determined by VREF, R1, R2, and IADJ as follows (for more details see the Application Hints section): VO2 = VREF (1+R1/R2) + IADJR1
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Table 6: Output1 And Output2 Dual Specification (IO = 10mA to 1A, TJ = 0 to 125C, VI = 4.5V to 7V, CI = 4.7F, C O1 = CO2 = 4.7F, otherwise specified)
Symbol IGND IGND IST TSHDN Parameter Quiescent Current (Fixed/ADJ) VI 7V Quiescent Current (Fixed/Fixed) VI 7V Total Current Limit IO1 + IO2 Thermal Shutdown Test Conditions IOUT1,2 = 5mA to 1A IOUT1,2 = 5mA to 1A 2 175 5 Min. Typ. Max. 5 7 Unit mA mA A C C
DTSHDN Thermal Shutdown Hysteresis
Table 7: Electrical Characteristics Of Fixed Output 1.5V (IO = 10mA to 1A, TJ = 0 to 125C, VI = 4.5V to 7V, CI = 4.7F, CO1 = CO2 = 4.7F, otherwise specified)
Symbol VO VO VO VO VD IS IOMIN eN SVR VO/IO Parameter Output Voltage 1.5V Output Voltage 1.5V Line Regulation Load Regulation Current Limit Min. Output Current for regulation RMS Output Noise (1)(4) Supply Voltage Rejection (2)(4) Transient Response Change of VO with step T = 25C VI = 5V VI = 5V, IO = 1mA to 1A, tr 1s VI = 5V, IO = 1A to 1mA, tf 1s 0 to 5V step input, IO = 1mA to 1A, tr 1s VI = 5V, IO = short to IO = 10mA 60 10(5) 10(5) 10(5) % 0.003 Test Conditions IO = 5mA to 1A, VI = 4.75 to 5.25V T = 25C IO = 5mA to 1A, VI = 4.75 to 5.25V VI = 4.75 to 5.25V, IO = 5mA to 1A VI = 4.75V, IO = 10mA to 1A VI = 5.5V 1 0 Min. 1.47 1.455 Typ. 1.5 1.5 Max. 1.53 1.545 15 12 1.3 Unit V V mV mV V A mA % dB %
Dropout Voltage VO = -1% IO = 1A
load change(3)(4) VO1/VI Transient Response Change of VOUT1 with application of VI (3)(4) VO/IO Transient Response Short Circuit Removal Response (3)(4) Thermal Regulation (4) Temperature Stability (4) Long Term Stability (4) (1000Hrs)
20(5)
%
TR S S
IO = 1A, tPULSE = 30ms TJ = 125C
0.1 0.5 0.3
%/W % %
NOTE NOTE NOTE NOTE NOTE
1: 2: 3: 4: 5:
Bandwidth of 10 Hz to 10KHz. 120Hz input ripple. CI = 20F, C1 and CO2 = 10F. CI, CO1 and CO2 are all X7R ceramic capacitors. Guaranteed by design, not tested in production. % undershoot or overshoot of VO.
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Table 8: Electrical Characteristics Of Fixed Output 1.8V (IO = 10mA to 1A, TJ = 0 to 125C, VI = 4.5V to 7V, CI = 4.7F, CO1 = CO2 = 4.7F, otherwise specified)
Symbol VO VO VO VO VD IS IOMIN eN SVR VO/IO Parameter Output Voltage 1.8V Output Voltage 1.8V Line Regulation Load Regulation Test Conditions IO = 5mA to 1A, VI = 4.75 to 5.25V T = 25C IO = 5mA to 1A, VI = 4.75 to 5.25V VI = 4.75 to 5.25V, IO = 5mA to 1A VI = 4.75V, IO = 10mA to 1A 1 0 T = 25C VI = 5V VI = 5V, IO = 1mA to 1A, tr 1s VI = 5V, IO = 1A to 1mA, tf 1s 0 to 5V step input, IO = 1mA to 1A, tr 1s VI = 5V, IO = short to IO = 10mA 60 10(5) 10(5) 10(5) % 0.003 Min. 1.764 1.746 Typ. 1.8 1.8 Max. 1.836 1.854 15 12 1.3 Unit V V mV mV V A mA % dB %
Dropout Voltage VO = -1% IO = 1A Current Limit VI = 5.5V Min. Output Current for regulation RMS Output Noise (1)(4) Supply Voltage Rejection (2)(4) Transient Response Change of VO with step
load change(3)(4) VO1/VI Transient Response Change of VOUT1 with application of VI (3)(4) VO/IO Transient Response Short Circuit Removal Response (3)(4) Thermal Regulation (4) Temperature Stability Long Term Stability (1000Hrs)
(4) (4)
20(5)
%
TR S S
IO = 1A, tPULSE = 30ms TJ = 125C
0.1 0.5 0.3
%/W % %
NOTE NOTE NOTE NOTE NOTE
1: 2: 3: 4: 5:
Bandwidth of 10 Hz to 10KHz. 120Hz input ripple. CI = 20F, C1 and CO2 = 10F. CI, CO1 and CO2 are all X7R ceramic capacitors. Guaranteed by design, not tested in production. % undershoot or overshoot of VO.
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Table 9: Electrical Characteristics Of Fixed Output 2.5V (IO = 10mA to 1A, TJ = 0 to 125C, VI = 4.5V to 7V, CI = 4.7F, CO1 = CO2 = 4.7F, otherwise specified)
Symbol VO VO VO VO VD IS IOMIN eN SVR VO/IO Parameter Output Voltage 2.5V Output Voltage 2.5V Line Regulation Load Regulation Test Conditions IO = 5mA to 1A, VI = 4.75 to 5.25V T = 25C IO = 5mA to 1A, VI = 4.75 to 5.25V VI = 4.75 to 5.25V, IO = 5mA to 1A VI = 4.75V, IO = 10mA to 1A 1 0 T = 25C VI = 5V VI = 5V, IO = 1mA to 1A, tr 1s VI = 5V, IO = 1A to 1mA, tf 1s 0 to 5V step input, IO= 1mA to 1A, tr 1s VI = 5V, IO = short to IO = 10mA 60 10(5) 10(5) 10(5) % 0.003 Min. 2.45 2.425 Typ. 2.5 2.5 Max. 2.55 2.575 15 12 1.3 Unit V V mV mV V A mA % dB %
Dropout Voltage VO = -1% IO = 1A Current Limit VI = 5.5V Min. Output Current for regulation RMS Output Noise (1)(4) Supply Voltage Rejection (2)(4) Transient Response Change of VO with step
load change(3)(4) VO1/VI Transient Response Change of VOUT1 with application of VI (3)(4) VO/IO Transient Response Short Circuit Removal Response (3)(4) Thermal Regulation (4) Temperature Stability Long Term Stability (1000Hrs)
(4) (4)
20(5)
%
TR S S
IO = 1A, tPULSE = 30ms TJ = 125C
0.1 0.5 0.3
%/W % %
NOTE NOTE NOTE NOTE NOTE
1: 2: 3: 4: 5:
Bandwidth of 10 Hz to 10KHz. 120Hz input ripple. CI = 20F, C1 and CO2 = 10F. CI, CO1 and CO2 are all X7R ceramic capacitors. Guaranteed by design, not tested in production. % undershoot or overshoot of VO.
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Table 10: Electrical Characteristics Of Fixed Output 2.8V (IO = 10mA to 1A, TJ = 0 to 125C, VI = 4.5V to 7V, CI = 4.7F, CO1 = CO2 = 4.7F, otherwise specified)
Symbol VO VO VO VO VD IS IOMIN eN SVR VO/IO Parameter Output Voltage 2.8V Output Voltage 2.8V Line Regulation Load Regulation Test Conditions IO = 5mA to 1A, VI = 4.75 to 5.25V T = 25C IO = 5mA to 1A, VI = 4.75 to 5.25V VI = 4.75 to 5.25V, IO = 5mA to 1A VI = 4.75V, IO = 10mA to 1A 1 0 T = 25C VI = 5V VI = 5V, IO = 1mA to 1A, tr 1s VI = 5V, IO = 1A to 1mA, tf 1s 0 to 5V step input, IO= 1mA to 1A, tr 1s VI = 5V, IO = short to IO = 10mA 60 10(5) 10(5) 10(5) % 0.003 Min. 2.744 2.716 Typ. 2.8 2.8 Max. 2.856 2.884 15 12 1.3 Unit V V mV mV V A mA % dB %
Dropout Voltage VO = -1% IO = 1A Current Limit VI = 5.5V Min. Output Current for regulation RMS Output Noise (1)(4) Supply Voltage Rejection (2)(4) Transient Response Change of VO with step
load change(3)(4) VO1/VI Transient Response Change of VOUT1 with application of VI (3)(4) VO/IO Transient Response Short Circuit Removal Response (3)(4) Thermal Regulation (4) Temperature Stability Long Term Stability (1000Hrs)
(4) (4)
20(5)
%
TR S S
IO = 1A, tPULSE = 30ms TJ = 125C
0.1 0.5 0.3
%/W % %
NOTE NOTE NOTE NOTE NOTE
1: 2: 3: 4: 5:
Bandwidth of 10 Hz to 10KHz. 120Hz input ripple. CI = 20F, C1 and CO2 = 10F. CI, CO1 and CO2 are all X7R ceramic capacitors. Guaranteed by design, not tested in production. % undershoot or overshoot of VO.
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Table 11: Electrical Characteristics Of Fixed Output 3.0V (IO = 10mA to 1A, TJ = 0 to 125C, VI = 4.5V to 7V, CI = 4.7F, CO1 = CO2 = 4.7F, otherwise specified)
Symbol VO VO VO VO VD IS IOMIN eN SVR VO/IO Parameter Output Voltage 3.0V Output Voltage 3.0V Line Regulation Load Regulation Test Conditions IO = 5mA to 1A, VI = 4.75 to 5.25V T = 25C IO = 5mA to 1A, VI = 4.75 to 5.25V VI = 4.75 to 5.25V, IO = 5mA to 1A VI = 4.75V, IO = 10mA to 1A 1 0 T = 25C VI = 5V VI = 5V, IO = 1mA to 1A, tr 1s VI = 5V, IO = 1A to 1mA, tf 1s 0 to 5V step input, IO= 1mA to 1A, tr 1s VI = 5V, IO = short to IO = 10mA 60 10(5) 10(5) 10(5) % 0.003 Min. 2.94 2.91 Typ. 3.0 3.0 Max. 3.06 3.09 15 12 1.3 Unit V V mV mV V A mA % dB %
Dropout Voltage VO = -1% IO = 1A Current Limit VI = 5.5V Min. Output Current for regulation RMS Output Noise (1)(4) Supply Voltage Rejection (2)(4) Transient Response Change of VO with step
load change(3)(4) VO1/VI Transient Response Change of VOUT1 with application of VI (3)(4) VO/IO Transient Response Short Circuit Removal Response (3)(4) Thermal Regulation (4) Temperature Stability Long Term Stability (1000Hrs)
(4) (4)
20(5)
%
TR S S
IO = 1A, tPULSE = 30ms TJ = 125C
0.1 0.5 0.3
%/W % %
NOTE NOTE NOTE NOTE NOTE
1: 2: 3: 4: 5:
Bandwidth of 10 Hz to 10KHz. 120Hz input ripple. CI = 20F, C1 and CO2 = 10F. CI, CO1 and CO2 are all X7R ceramic capacitors. Guaranteed by design, not tested in production. % undershoot or overshoot of VO.
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Table 12: Electrical Characteristics Of Fixed Output 3.3V (IO = 10mA to 1A, TJ = 0 to 125C, VI = 4.5V to 7V, CI = 4.7F, CO1 = CO2 = 4.7F, otherwise specified)
Symbol VO VO VO VO VD IS IOMIN eN SVR VO/IO Parameter Output Voltage 3.3V Output Voltage 3.3V Line Regulation Load Regulation Test Conditions IO = 5mA to 1A, VI = 4.75 to 5.25V T = 25C IO = 5mA to 1A, VI = 4.75 to 5.25V VI = 4.75 to 5.25V, IO = 5mA to 1A VI = 4.75V, IO = 10mA to 1A 1 0 T = 25C VI = 5V VI = 5V, IO = 1mA to 1A, tr 1s VI = 5V, IO = 1A to 1mA, tf 1s 0 to 5V step input, IO= 1mA to 1A, tr 1s VI = 5V, IO = short to IO = 10mA 60 10(5) 10(5) 10(5) % 0.003 Min. 3.234 3.2 Typ. 3.3 3.3 Max. 3.366 3.4 15 12 1.3 Unit V V mV mV V A mA % dB %
Dropout Voltage VO = -1% IO = 1A Current Limit VI = 5.5V Min. Output Current for regulation RMS Output Noise (1)(4) Supply Voltage Rejection (2)(4) Transient Response Change of VO with step
load change(3)(4) VO1/VI Transient Response Change of VOUT1 with application of VI (3)(4) VO/IO Transient Response Short Circuit Removal Response (3)(4) Thermal Regulation (4) Temperature Stability Long Term Stability (1000Hrs)
(4) (4)
20(5)
%
TR S S
IO = 1A, tPULSE = 30ms TJ = 125C
0.1 0.5 0.3
%/W % %
NOTE NOTE NOTE NOTE NOTE
1: 2: 3: 4: 5:
Bandwidth of 10 Hz to 10KHz. 120Hz input ripple. CI = 20F, C1 and CO2 = 10F. CI, CO1 and CO2 are all X7R ceramic capacitors. Guaranteed by design, not tested in production. % undershoot or overshoot of VO.
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Table 13: Electrical Characteristics Of Adjustable Output (IO = 10mA to 1A, TJ = 0 to 125C, VI = 4.5V to 7V, CI = 4.7F, CO1 = CO2 = 4.7F, otherwise specified)
Symbol VO VO VO2 VO2 VD IS IADJ IADJ IOMIN eN Parameter Reference Voltage Reference Voltage Line Regulation 2 Load Regulation 2 Test Conditions IO = 5mA to 1A, VI = 4.75 to 5.25V, T = 25C IO = 5mA to 1A, VI = 4.75 to 5.25V VI = 4.75 to 5.25V, IO = 5mA to 1A VI = 4.75V, IO = 10mA to 1A 1 1 200 2 T = 25C VI = 5V VI = 5V, IO = 1mA to 1A, tr 1s VI = 5V, IO = 1A to 1mA, tf 1s 0 to 5V step input, IO= 1mA to 1A, tr 1s VI = 5V, IO = short to IO = 10mA 60 10(5) 10
(5)
Min. 1.225 1.212
Typ. 1.25 1.25
Max. 1.275 1.287 0.35 0.4 1.3
Unit V V % % V A A nA mA % dB %
Dropout Voltage VO = -1% IO = 1A Current Limit VI = 5.5V Adjustable Current (sinking) Adjustable Current Change IO = 10mA to 1A Min. Output Current for regulation
RMS Output Noise (1)(4) SVR Supply Voltage Rejection (2)(4) VO2/IO2 Transient Response Change of VO1 with step load change(3)(4) VO2/VI Transient Response Change of VOUT1 with application of VI (3)(4) VO2/IO2 Transient Response Short Circuit Removal Response (3)(4) TR Thermal Regulation (4) S S Temperature Stability Long Term Stability (1000Hrs)
(4) (4)
0.003
10(5)
%
20(5)
%
IO = 1A, tPULSE = 30ms TJ = 125C
0.1 0.5 0.3
%/W % %
NOTE NOTE NOTE NOTE NOTE
1: 2: 3: 4: 5:
Bandwidth of 10 Hz to 10KHz. 120Hz input ripple. CI = 20F, C1 and CO2 = 10F. CI, CO1 and CO2 are all X7R ceramic capacitors. Guaranteed by design, not tested in production. % undershoot or overshoot of VO.
APPLICATION HINTS EXTERNAL CAPACITORS Like any low-dropout regulator, the ST2L05 requires external capacitors for stability. We suggest soldering both capacitors as close as possible to the relative pins (1, 4 and 5). INPUT CAPACITOR An input capacitor, whose value is, at least, 2.2F is required; the amount of the input capacitance can be increased without limit if a good quality tantalum or aluminium capacitor is used.SMD X7R or Y5V ceramic multilayer capacitors could not ensure stability in any condition because of their variable characteristics with Frequency and Temperature; the use of this capacitor is strictly related to the use of the output capacitors. For more details read the "OUTPUT CAPACITOR SECTION".The input capacitor must be located at a distance of not more than 0.5" from the input pin of the device and returned to a clean analog ground. OUTPUT CAPACITOR The ST2L05 is designed specifically to work with Ceramic and Tantalum capacitors.Special care must be taken when a Ceramic multilayer capacitor is used.Due to their characteristics they can sometimes have
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an ESR value lower than the minimum required by the ST2L05 and their relatively large capacitance can change a lot depending on the ambient temperature.The test results of the ST2L05 stability using multilayer ceramic capacitors show that a minimum value of 2.2F is needed for both regulators. This value can be increased without limit if the input capacitor value is major or equal to 4.7F, and up to 10F if the input capacitor is minor than 4.7F.Surface-mountable solid tantalum capacitors offer a good combination of small physical size for the capacitance value and ESR in the range needed by the ST2L05. The test results show good stability for both outputs with values of at least 1F. The value can be increased without limit for even better performance such as transient response and noise. IMPORTANT: The output capacitor must maintain its ESR in the stable region over the full operating temperature to assure stability. More over, capacitor tolerance and variations due to temperature must be considered to assure that the minimum amount of capacitance is provided at all times. For this reason, when a Ceramic multilayer capacitor is used, the better choice for temperature coefficient is the X7R type, which holds the capacitance within 15%. The output capacitor should be located not more than 0.5" from the output pins of the device and returned to a clean analog ground. ADJUSTABLE REGULATOR The ST2L05 has a 1.25V reference voltage between the output and the adjust pins (respectively pin 4 and 2). When a resistor R1 is placed between these two terminals, a constant current flows through R1 and down to R2 to set the overall (VO2 to GND) output voltage. Minimum load current is 2mA max in all temperature conditions. Figure 6: Application Circuit
VO = VREF(1+R 1/R 2)+IADJR1 IADJ is very small (typically 35A) and constant: in the VO calculation it can be ignored.
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TYPICAL CHARACTERISTICS Figure 7: Reference Voltage vs Temperature Figure 10: Reference Voltage vs Input Voltage
Figure 8: Reference Line Regulation vs Temperature
Figure 11: Dropout Voltage vs Temperature (Adjustable Output)
Figure 9: Reference Load Regulation vs Temperature
Figure 12: Dropout Voltage vs Input Voltage (Adjustable Output)
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Figure 13: Minimum Load Current vs Temperature (Adjustable Output) Figure 16: Line Regulation vs Temperature
Figure 14: Adjust Pin Current vs Temperature (Adjustable Output)
Figure 17: Load Regulation vs Temperature
Figure 15: Output Voltage vs Temperature
Figure 18: Output Voltage vs Input Voltage
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Figure 19: Dropout Voltage vs Temperature (Fixed Output) Figure 22: Supply Voltage Rejection vs Frequency
Figure 20: Dropout Voltage vs Input Voltage
Figure 23: Quiescent Current vs Temperature (Fixed/ADJ Version)
Figure 21: Supply Voltage Rejection vs Temperature
Figure 24: Quiescent Current vs Temperature (Fixed/Fixed Version)
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Figure 25: Short Circuit Removal Response Figure 28: Change of VO with Step Load Change
VI=5V, I O=short circuit to 10mA, CO=10F, CI=22F all ceramic X5R, TJ=25C
VI=5V, I O=1A to 1mA, CO=10F, CI=22F all ceramic X5R, TJ=25C, tFALL=1s
Figure 26: Change of VO with Step Load Change
Figure 29: Short Circuit Removal Response
VI=5V, I O=1mA to 1A, CO=10F, CI=22F all ceramic X5R, TJ=25C
VI=5V, I O=short circuit to 10mA, CO=10F, CI=22F all ceramic X5R, TJ=25C
Figure 27: Change of VO with Step Load Change
Figure 30: Change of VO with Step Load Change
VI=5V, I O=1mA to 1A, CO=10F, CI=22F all ceramic X5R, TJ=25C, tRISE=1s
VI=5V, I O=1mA to 1A, CO=10F, CI=22F all ceramic X5R, TJ=25C, tRISE=1s
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Figure 31: Change of VO with Step Load Change Figure 33: Start-Up Transient
VI=5V, I O=1mA to 1A, CO=10F, CI=22F all ceramic X5R, TJ=25C, tRISE=tFALL =1s
VI=0 to 5V, I O=1mA, CO=10F, CI=22F all ceramic X5R, TJ=25C, tRISE 1s
Figure 32: Change of VO with Step Load Change
Figure 34: Start-Up Transient
VI=5V, I O=1A to 1mA, CO=10F, CI=22F all ceramic X5R, TJ=25C, tFALL=1s
VI=0 to 5V, I O=1A, CO=10F, CI=22F all ceramic X5R, TJ=25C, tRISE 1s
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SPAK-5L MECHANICAL DATA
DIM. A A2 C C1 D D1 F G G1 H1 H2 H3 L L1 L2 M N V 3 8.89 0.79 0.25 6 3 9.27 8.89 10.41 7.49 9.14 1.04 0.350 0.031 0.010 6 1.02 7.87 0.63 1.69 6.8 5.59 9.52 9.14 10.67 0.365 0.350 0.410 0.295 0.360 0.041 mm. MIN. 1.78 0.03 0.25 0.25 1.27 8.13 0.79 0.040 0.310 0.025 0.067 0.268 0.220 0.375 0.360 0.420 TYP MAX. 2.03 0.13 MIN. 0.070 0.001 0.010 0.010 0.050 0.320 0.031 inch TYP. MAX. 0.080 0.005
PO13F1/B
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DFN8 (5x6) MECHANICAL DATA
mm. DIM. MIN. A 0.80 TYP 0.90 MAX. 1.00 MIN. 0.032 TYP. 0.035 MAX. 0.039 inch
b
0.35
0.40
0.47
0.014
0.016
0.018
D
5.00
0.197
D2
4.05
4.2
4.30
0.163
0.165
0.167
E
6.00
0.236
E2
3.40
3.55
3.65
0.134
0.140
0.144
e
1.27
0.049
L
0.70
0.80
0.90
0.028
0.031
0.035
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Tape & Reel SPAK-xL MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 9.70 10.85 2.30 3.9 11.9 9.80 10.95 2.40 4.0 12.0 12.8 20.2 60 14.4 9.90 11.05 2.50 4.1 12.1 0.382 0.423 0.090 0.153 0.468 0.386 0.427 0.094 0.157 0.472 13.0 TYP MAX. 180 13.2 0.504 0.795 2.362 0.567 0.390 0.431 0.098 0.161 0.476 0.512 MIN. TYP. MAX. 7.086 0.519 inch
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Table 14: Revision History
Date 18-Nov-2004 24-Nov-2004 06-Dec-2004 Revision 4 5 6 Description of Changes Remove PPAK Version. New Mechanical Data Release. New Mechanical Data Release.
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners (c) 2004 STMicroelectronics - All Rights Reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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