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SA1084
5A LDO VOLTAGE REGULATOR
DESCRIPTION
The SA1084 is a positive low voltage dropout regulator, and the voltage dropout is 1.5V at 5A. SA1084 provides two versions: fixed and adjustable versions. VOUT of fixed version has a tolerance of less than 1% for five kinds of output voltages 1.5V, 1.8V, 2.5V, 3.3V, and 5.0V. The SA1084 offers some key features include thermal shutdown and current limiting .The SA1084 is an excellent choice for use in various electronic equipments.
FEATURES
* 1% accuary in fixed version 1.5V, 1.8V, 2.5V, 3.3V, 5.0V and adjustable version * Low Dropout Voltage: 1.5V at 5A output current * Current Limiting: 6.5A * Thermal Shutdown * Line Regulation(Adj Version: Typical): 0.015% * Load Regulation ( Adj Version: Typical): 0.1% * Temperature Range: 0 to 125C
APPLICATIONS
* High Efficiency Linear Regulators * Post Regulators for Switching Supplies * Battery Charger * Microprocessor Supply * Desktop PCs, RISC and Embedded Processors Supply
ORDERING INFORMATION (Temperature range: 0~125C)
Part No. SA1084D-ADJ SA1084D-ADJTR SA1084D-1.5 SA1084D-1.5TR SA1084D-1.8 SA1084D-1.8TR
Package
Marking SA1084D-ADJ SA1084D-ADJ SA1084D-1.5 SA1084D-1.5 SA1084D-1.8 SA1084D-1.8
Material Pb free Pb free Pb free Pb free Pb free Pb free
Package Type Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel
TO-252-2L
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SA1084
Part No. SA1084D-2.5 SA1084D-2.5TR SA1084D-3.3 SA1084D-3.3TR SA1084D-5.0 SA1084D-5.0TR SA1084S-ADJ SA1084S-ADJTR SA1084S-1.5 SA1084S-1.5TR SA1084S-1.8 SA1084S-1.8TR SA1084S-2.5 SA1084S-2.5TR SA1084S-3.3 SA1084S-3.3TR SA1084S-5.0 SA1084S-5.0TR SA1084T-ADJ SA1084T-1.5 SA1084T-1.8 SA1084T-2.5 SA1084T-3.3 SA1084T-5.0 SA1084S2-ADJ SA1084S2-ADJTR SA1084S2-1.5 SA1084S2-1.5TR SA1084S2-1.8 SA1084S2-1.8TR SA1084S2-2.5 SA1084S2-2.5TR SA1084S2-3.3 SA1084S2-3.3TR SA1084S2-5.0 SA1084S2-5.0TR TO-263-2L TO-220-3L TO-263-3L TO-252-2L Package Marking SA1084D-2.5 SA1084D-2.5 SA1084D-3.3 SA1084D-3.3 SA1084D-5.0 SA1084D-5.0 SA1084S-ADJ SA1084S-ADJ SA1084S-1.5 SA1084S-1.5 SA1084S-1.8 SA1084S-1.8 SA1084S-2.5 SA1084S-2.5 SA1084S-3.3 SA1084S-3.3 SA1084S-5.0 SA1084S-5.0 SA1084T-ADJ SA1084T-1.5 SA1084T-1.8 SA1084T-2.5 SA1084T-3.3 SA1084T-5.0 SA1084S2-ADJ SA1084S2-ADJ SA1084S2-1.5 SA1084S2-1.5 SA1084S2-1.8 SA1084S2-1.8 SA1084S2-2.5 SA1084S2-2.5 SA1084S2-3.3 SA1084S2-3.3 SA1084S2-5.0 SA1084S2-5.0 Material Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Pb free Package Type Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tube Tube Tube Tube Tube Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel
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SA1084
BLOCK DIAGRAM
ABOSOLUTE MAXIMUM RATINGS
Characteristics Input Supply Voltage Lead Temperature (Soldering, 5 seconds) Operating Junction Temperature Range Storage Temperature Range Power Disspation ESD Tolerance (Minimum) Symbol VIN TLEAD TJ TS PD ESD Ratings 20 260 150 -65 ~ +150 Internally Limited (note1) 2000 Unit V C C V mW V
Note1: The maximum allowable power dissipation is a function of maximum operating junction temperature, TJ
(max),
the junction to ambient thermal resistance, JA, and the ambient temperature Tamb. The maximum
allowable power dissipation at any ambient temperature is given: PD (max) = (TJ (max) - Tamb)/JA, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the regulator will go into thermal shutdown. The junction to ambient thermal resistance, JA of some packages may be different; the value of JA depends on mounting technique.
RECOMMENDED OPERATING CONDITIONS
Characteristics Input voltage Operating Junction Temperature Range Symbol VIN TJ Ratings 12 0 ~ +125 Unit V C
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SA1084
ELECTRICAL CHARACTERISTICS (Tamb=25C, unless otherwise specified. Limits appearing in Boldface
type apply over the entire junction temperature range for operation, 0C to 125C. ) Characteristics Reference Voltage Symbol VREF Conditions SA1084-ADJ, IOUT=10mA, VIN-VOUT=3V, 10mAIOUT5A, 1.5VVIN-VOUT5V SA1084-1.5, IOUT=10mA, VIN=4.5V, 10mAIOUT5A, 3.0VVIN6V SA1084-1.8, IOUT=10mA, VIN=4.8V, 10mAIOUT 5A, 3.3VVIN6V SA1084-2.5, Output Voltage VOUT IOUT=10mA, VIN=5.5V 10mAIOUT5A, 4.0VVIN 7V SA1084-3.3, IOUT=10mA, VIN=6.3V, 10mAIOUT5A, 4.8VVIN8V SA1084-5.0, IOUT=10mA, VIN=8V, 10mA IOUT5A, 6.5VVIN10V SA1084-ADJ, IOUT=10mA, 2.85VVIN10V SA1084-1.5, IOUT=10mA, 3.0VVIN10V SA1084-1.8, Line Regulation VOUT IOUT=10mA, 3.3VVIN10V SA1084-2.5, IOUT=10mA, 4.0VVIN10V SA1084-3.3, IOUT=10mA, 4.8VVIN10V SA1084-5.0, IOUT=10mA, 6.5VVIN10V SA1084-ADJ, 0mAIOUT5A, VIN-VOUT=3V SA1084-1.5, 0mAIOUT5A, Load Regulation VOUT VIN-VOUT=3V SA1084-1.8, 0mA IOUT5A, VIN-VOUT=3V SA1084-2.5, 0mAIOUT5A, VIN-VOUT=3V 4.95 4.9 5 5 0.015 0.035 0.5 1 0.5 1 0.5 1 0.5 1 0.5 1 0.1 0.2 3 7 3 7 3 7 5.05 5.1 0.2 0.2 6 6 6 6 6 6 6 6 10 10 0.3 0.4 15 20 15 20 15 20 % mV mV mV mV mV % mV mV mV V 3.267 3.234 3.3 3.3 3.333 3.366 V 2.475 2.45 2.5 2.5 2.525 2.55 V 1.782 1.764 1.8 1.8 1.818 1.836 V 1.485 1.47 1.5 1.5 1.515 1.53 V 1.238 1.225 1.250 1.250 1.262 1.270 V Min. Typ. Max. Unit
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SA1084
Characteristics Symbol Conditions SA1084-3.3, 0mAIOUT5A, Load Regulation VOUT VIN-VOUT=3V SA1084-5.0, 0mAIOUT5A, VIN-VOUT=3V Dropout Voltage Current Limit Minimum Current Quiescent Current Ripple Rejection Adjust Pin Current Adjust Pin Current Change Temperature Stability Long Term Stability RMS Noise (% of VOUT) Load VDROP ILIMIT ILOAD
(MIN)
Min.
Typ. 3 7 5 10 1.45
Max. 15 20 20 35 1.5
Unit mV mV V A
IOUT=5A, VREF, VOUT=1% VIN-VOUT=3V VIN=10V (SA1084-ADJ) VIN=10V (SA1084) fRIPPLE=120Hz, COUT=25F Tantalum, IOUT=5A, VIN-VOUT=3V VIN=4.25V, IOUT=10mA 10mAIOUT5A, 1.5V(VIN-VOUT)4.5V IOUT=10mA, VIN-VOUT=1.5V Tamb=125C, 1000Hrs 10Hzf10kHz TO-263-3L 60 5.5
6.5 3 5 72 55 0.2 0.5 0.5 0.003 60 60 60 100 120 5 10 10
mA mA dB A A % % %
IQ PSRR IADJ IADJ
Thermal Resistance
JA
TO-263-2L TO-220-3L TO-252-2L
C/W
PIN CONFIGURATION
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SA1084
PIN DESCRIPTION
Pin No. 1 2 3 Pin name GND/ADJ VOUT VIN I/O G/O O I Ground/ADJ Output voltage Input supply voltage Functions
FUNCTION DESCRIPTION
The SA1084 is a LDO regulator, it's pass transistor is made up of a single NPN transistor being driven by a PNP. The dropout voltage is defined as: VDROP = VBE+ VSAT. The SA1084 series of fixed and adjustable regulators are easy to use. Output voltages are 1.5V, 1.8V, 2.5V, 3.3V, and 5.0V.On-chip thermal shut down provides protection against any combination of overload and ambient temperature that would create excessive junction temperature. The SA1084 requires an output capacitor for device stability. Its value of 22F tantalum covers all cases of bypassing the adjustment terminal. Without bypassing the adjustment terminal smaller capacitors can be used with equally good results .depends upon the application circuit. In general, linear regulator stability decreases with higher output currents.
TYPICAL APPLICATION CIRCUIT
Figure 1. Typical Fixed Output Voltage
Figure 2. Typical Adjustable Output Voltage
Note: The circuit and parameters are reference only, please set the parameters of the real application circuit based on the real test.
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SA1084
TYPICAL CHARACTERISTICS CURVES
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SA1084
PACKAGE OUTLINE
TO-252-2L UNIT: mm
1.500.15
9.700.30
0.60.9
2.53.0
TO-252-2L
1.60.2
5.60.3
UNIT: mm
1.80 REF
0.91.25
10.100.30
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1.41.7
6.10.2
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5.30REF
3.80 REF
SA1084
PACKAGE OUTLINE
TO-220-3L UNIT: mm
TO-263-2L
UNIT: mm
15.250.25 5.280.20
8.700.20
1.50.20
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SA1084
PACKAGE OUTLINE
TO-263-3L UNIT: mm
Disclaimer: * Silan reserves the right to make changes to the information herein for the improvement of the design and performance without further notice! * All semiconductor products malfunction or fail with some probability under special conditions. When using Silan products in system design or complete machine manufacturing, it is the responsibility of the buyer to comply with the safety standards strictly and take essential measures to avoid situations in which a malfunction or failure of such Silan products could cause loss of body injury or damage to property. * Silan will supply the best possible product for customers!
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