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MIC5202
Micrel
MIC5202
Dual 100mA Low-Dropout Voltage Regulator
Preliminary Information
General Description
The MIC5202 is a family of dual linear voltage regulators with very low dropout voltage (typically 17mV at light loads and 210mV at 100mA), and very low ground current (1mA at 100mA output-each section), offering better than 1% initial accuracy with a logic compatible ON/OFF switching input. Designed especially for hand-held battery powered devices, the MIC5202 is switched by a CMOS or TTL compatible logic signal. This ENABLE control my be tied directly to VIN if unneeded. When disabled, power consumption drops nearly to zero. The ground current of the MIC5202 increases only slightly in dropout, further prolonging battery life. Key MIC5202 features include protection against reversed battery, current limiting, and over-temperature shutdown. The MIC5202 is available in several fixed voltages. Other options are available; contact Micrel for details.
Features
* * * * * * * * * * * * * * * * * * * High output voltage accuracy Variety of output voltages Guaranteed 100mA output Low quiescent current Low dropout voltage Extremely tight load and line regulation Very low temperature coefficient Current and thermal limiting Reverse-battery protection Zero OFF mode current Logic-controlled electronic shutdown Available in SO-8 package Cellular Telephones Laptop, Notebook, and Palmtop Computers Battery Powered Equipment PCMCIA VCC and VPP Regulation/Switching Bar Code Scanners SMPS Post-Regulator/ DC to DC Modules High Efficiency Linear Power Supplies
Applications
3
Ordering Information
Part Number MIC5202-3.0BM MIC5202-3.3BM MIC5202-4.8BM MIC5202-5.0BM Volts Accuracy Temperature Range* Package 3.0 3.3 4.85 5.0 1% 1% 1% 1% -40C to +125C -40C to +125C -40C to +125C -40C to +125C SO-8 SO-8 SO-8 SO-8
Pin Configuration
VOUT (A) GROUND VOUT (B) GROUND MIC5202-xxBM VIN (A) ENABLE (A) VIN (B) ENABLE (B)
* Junction Temperature
Other voltages are available; contact Micrel for details.
Both GROUND pins must be tied to the same potential. VIN (A) and VIN (B) may run from separate supplies.
Typical Application
MIC5202-3.3
Output A Enable A Output B Enable B
1 (x2)
ENABLE pins may be tied directly to VIN
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Absolute Maximum Ratings
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device beyond its specified Operating Ratings. Power Dissipation ............................................... Internally Limited Lead Temperature (Soldering, 5 seconds) .......................... 260C Operating Junction Temperature Range ............. -40C to +125C Input Supply Voltage ................................................ -20V to +60V ENABLE Input Voltage ............................................. -20V to +60V SO-8 JA ....................................................................... See Note 1
Recommended Operating Conditions
Input Voltage ............................................................... 2.5V to 26V Operating Junction Temperature Range ............. -40C to +125C ENABLE Input Voltage ..................................................... 0V to VIN
Electrical Characteristics
Limits in standard typeface are for TJ = 25C and limits in boldface apply over the junction temperature range of -40C to +125C. Specifications are for each half of the (dual) MIC5202. Unless otherwise specified, VIN = VOUT + 1V, IL = 1mA, CL = 10F, and VCONTROL 2.0V. Symbol VO VO T VO VO VO VO VIN - VO Parameter Output Voltage Output Voltage Temperature Coef. Line Regulation Load Regulation Dropout Voltage (Note 4) Condition Variation from specified VOUT Accuracy (Note 2) VIN = VOUT + 1 V to 26V IL = 0.1mA to 100mA (Note 3) IL = 100A IL = 20mA IL = 30mA IL = 50mA IL = 100mA VCONTROL 0.7V (Shutdown) VCONTROL 2.0V, IL = 100A IL = 20mA IL = 30mA IL = 50mA IL = 100mA VIN = 0.5V less specified VOUT, IL = 100A (Note 5) VOUT = 0V (Note 6) Min -1 -2 40 0.004 0.04 17 130 150 180 225 0.01 170 270 330 500 1200 75 270 280 0.05 100 330 Typ Max 1 2 150 0.10 0.40 0.16 0.30 Units % ppm/C % % mV
350 A A
IQ IGND
Quiescent Current Ground Pin Current
1500 dB A mA %/W V
PSRR IGNDDO ILIMIT VO PD en
Ripple Rejection Ground Pin Current at Dropout Current Limit Thermal Regulation Output Noise
Control Input
VIL IIL
IH
Input Voltage Level Logic Low Logic High Control Input Current
OFF ON VIL 0.7V VIH 2.0V
0.7 2.0 0.01 8
V A
50
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Note 1:
Micrel
Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its rated operating conditions. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX) the junction-to-ambient thermal resistance, JA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: P(MAX) = (TJ(MAX) - TA) / JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The junction to ambient thermal resistance of the MIC5202BM is 160C/W mounted on a PC board. Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 0.1mA to 100mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification. Dropout Voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of the load current plus the ground pin current. Thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 100mA load pulse at VIN = 26V for t = 10ms, and is measured separately for each section.
Note 2: Note 3:
Note 4: Note 5: Note 6:
3
Typical Characteristics (Each Regulator--2 Regulators/Package)
Dropout Voltage vs. Output Current
250 DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (V) 200 150 100 50 0 0.01 0.4 OUTPUT VOLTAGE (V)
Dropout Voltage vs. Temperature
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0
Dropout Characteristics
0.3
IL = 100mA
IL = 100mA
0.2
0.1
IL = 1mA
IL = 100A, 1mA
0.1 1 10 100 1000 OUTPUT CURRENT (mA)
0.0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
2 4 6 8 INPUT VOLTAGE (V)
10
Ground Current vs. Output Current
10 GROUND CURRENT (mA) GROUND CURRENT (mA) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0
Ground Current vs. Supply Voltage
OUTPUT VOLTAGE (V)
Output Voltage vs. Output Current
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.0 0.1 0.2 OUTPUT CURRENT (A) 0.3 CIN = 2.2F COUT = 4.7F
IL = 100mA
1
IL = 1mA
0.1 0.01
0.1 1 10 100 OUTPUT CURRENT (mA)
2 4 6 8 SUPPLY VOLTAGE (V)
10
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Ground Current vs. Temperature
0.30 GROUND CURRENT (mA) ILOAD = 100A CIN = 2.2F COUT = 4.7F GROUND CURRENT (mA) 1.5 1.4 1.3 1.2 1.1 1.0 -50
Ground Current vs. Temperature
ILOAD = 100mA CIN = 2.2F COUT = 4.7F
OUTPUT (mV)
Thermal Regulation (3.3V Version)
100 50 0 200 -50 100 0 0 5 10 15 20 25 30 35 TIME (ms) CL = 4.7 F
0.25
0.20
0.15 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
0 50 100 TEMPERATURE (C)
150
3.6 OUTPUT VOLTAGE (V) 3.5 3.4 3.3 3.2 3.1
Output Voltage vs. Temp. (3.3V Version)
OUTPUT CURRENT (mA) CIN = 2.2F COUT = 4.7F
Output Current vs. Temperature
MIN. INPUT VOLTAGE (V) 300 280 260 240 220 200 180 160 140 VOUT = 0V (SHORT CIRCUIT) VOUT = 3.3V 3.30 3.29 3.28 3.27 3.26 3.25 3.24 3.23 3.22
LOAD (mA)
-100 -5
Minimum Input Voltage vs. Temperature
CIN = 2.2F COUT = 4.7F ILOAD = 1mA
3 DEVICES: HI / AVG / LO CURVES APPLICABLE AT 100A AND 100mA
3.0 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
120 100 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
3.21 3.20 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
Short Circuit Current vs. Input Voltage
SHORT CIRCUIT CURRENT (mA)
OUTPUT (mA) OUTPUT (mV)
250 200 150 100 50 0 1 CIN = 2.2F COUT = 4.7F VOUT = 3.3V 2 3 4 5 6 INPUT VOLTAGE (V) 7
0 -10 -20 -30 300 200 100 0 -2 0
OUTPUT (mA) OUTPUT (mV)
300
Load Transient
20 10
Load Transient
20 10 0 -10 -20 -30 300 200 100 0 -10 0 10 20 TIME (ms) 30 40
CL = 4.7F
CL = 47F
2 4 6 TIME (ms)
8
10
Supply Current vs. Supply Voltage (3.3V Version)
OUTPUT (mV)
Line Transient
5 0 -5 CL = 1 F IL = 1mA
OUTPUT (mV)
Line Transient
15 10 5 0 8 -5 6 4 2 -0.1 0 0.1 0.2 0.3 0.4 0.5 0.6 TIME (ms) CL = 10 F IL = 1mA
120 SUPPLY CURRENT (mA) 100 80 60 40 20 0 0 1 2 3 4 5 6 7 8 9 10 SUPPLY VOLTAGE (V) RL = 33
10
8 -10 6 4 2 -0.2 0 0.2 0.4 TIME (ms) 0.6 0.8
INPUT (V)
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INPUT (V)
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Micrel
Supply Current vs. Supply Voltage (3.3V Version)
60 OUTPUT (V) SUPPLY CURRENT (mA) 50 40 30 ENABLE (V) 20 10 0 0 1 2 3 4 5 6 SUPPLY VOLTAGE (V) 7 RL = 66 5 4 3 2 1 0 4 -1 2 0 -2 -50
Enable Transient (3.3V Version)
5 4 3 2 1 0 4 -1 2 0 -2 -50 OUTPUT (V)
Enable Transient (3.3V Version)
CL = 4.7 F IL = 1mA
CL = 4.7 F IL = 100mA
0
50 100 150 200 250 300 TIME (s)
ENABLE (V)
0
50 100 150 200 250 300 TIME (s)
Output Impedance
1000
Enable Current Threshold vs. Temperature
35 ENABLE CURRENT (A) ENABLE VOLTAGE (V) 1.6 CIN = 2.2F COUT = 4.7F 1.4 1.2 1 0.8 0.6 30 25 20 15 10 5 0 VEN = 2V VEN = 5V
Enable Voltage Threshold vs. Temperature
CIN = 2.2F COUT = 4.7F
OUTPUT IMPEDANCE ()
100 10 1 0.1
IL = 100A
3
IL = 1mA
ON OFF
0.01
IL = 100mA
1x100
10x100
100x100
1x103
10x103
100x103
FREQUENCY (Hz)
Ripple vs. Frequency
100 100
1x106
0.001
-5 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
0.4 -60 -30 0 30 60 90 120 150 TEMPERATURE (C)
Ripple vs. Frequency
100
Ripple vs. Frequency
RIPPLE VOLTAGE (dB)
RIPPLE VOLTAGE (dB)
80 60 40 20 0
RIPPLE VOLTAGE (dB)
IL = 100A
80 IL = 1mA 60 40 20 0
80 IL = 100mA 60 40 20 0
10x100
100x100
1x103
10x103
3
1x106
10x100
100x100
1x103
10x103
100x103
1x106
10x100
100x100
1x103
10x103
100x103
FREQUENCY (Hz)
100x10
FREQUENCY (Hz)
FREQUENCY (Hz)
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Applications Information
External Capacitors
A 1F capacitor is recommended between the MIC5202 output and ground to prevent oscillations due to instability. Larger values serve to improve the regulator's transient response. Most types of tantalum or aluminum electrolytics will be adequate; film types will work, but are costly and therefore not recommended. Many aluminum electrolytics have electrolytes that freeze at about -30C, so solid tantalums are recommended for operation below -25C. The important parameters of the capacitor are an effective series resistance of about 5 or less and a resonant frequency above 500kHz. The value of this capacitor may be increased without limit. At lower values of output current, less output capacitance is required for output stability. The capacitor can be reduced to 0.47F for current below 10mA or 0.33F for currents below 1 mA. A 1F capacitor should be placed from the MIC5202 input to ground if there is more than 10 inches of wire between the input and the AC filter capacitor or if a battery is used as the supply. ENABLE Input The MIC5202 features nearly zero OFF mode current. When the ENABLE input is held below 0.7V, all internal circuitry is powered off. Pulling this pin high (over 2.0V) re-enables the device and allows operation. The ENABLE pin requires a small amount of current, typically 15A. While the logic threshold is TTL/CMOS compatible, ENABLE may be pulled as high as 30V, independent of the voltage on VIN. The two portions of the MIC5202 may be enabled separately.
Thermal Considerations
Part I. Layout The MIC5202-xxBM (8-pin surface mount package) has the following thermal characteristics when mounted on a single layer copper-clad printed circuit board.
PC Board Dielectric FR4 Ceramic JA 160C/W 120C/W
Multi-layer boards having a ground plane, wide traces near the pads, and large supply bus lines provide better thermal conductivity. The "worst case" value of 160C/W assumes no ground plane, minimum trace widths, and a FR4 material board. Part II. Nominal Power Dissipation and Die Temperature The MIC5202-xxBM at a 25C ambient temperature will operate reliably at up to 625mW power dissipation when mounted in the "worst case" manner described above. At an ambient temperature of 55C, the device may safely dissipate 440mW. These power levels are equivalent to a die temperature of 125C, the recommended maximum temperature for non-military grade silicon integrated circuits.
General Notes
The MIC5202 will remain stable and in regulation with no load in addition to the internal voltage divider, unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Thermal shutdown is independant on both halfs of the dual MIC5202, however an over-temperature condition on one half might affect the other because of proximity. When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground. Both MIC5202 GROUND pins must be tied to the same ground potential. Isolation between the two halfs allows connecting the two VIN pins to different supplies.
50 mil
245 mil
150 mil
30 mil
50 mil
Minimum recommended board pad size, SO-8.
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