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HTC
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LM2931 Datasheet

0.1A LOW DROPOUT VOLTAGE REGULATORS


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0.1A LOW DROPOUT VOLTAGE REGULATORS
LM2931
Features
- 3-Terminal regulators
- 0.1A output within 2% over temperature
- Very low quiescent current
- Low dropout voltage (300mv Type)
- Extermely tight load and line regulation
- Very low temperature coefficent
- Current and thermal limiting
- Unregulated DC input canwithstand -20V
revers battery and +60V positive
transients
Applications
- High-efficiency linear regulator
- Battery powerd system
- Portable/Palm top/Notebook
computer
- Portable consumer equipment
- Portable Instrumentation
- Avionics
- Automotive Electronics
- SMPS Post-Regulator
TO-92
1. Vout 2. Gnd 3. Vin
1
ORDERING INFORMATION
DEVICE
PKG
LM2931L-XX
TO-92
(XX= Output Voltage=3.3, 5.0, 8.0, 8.5 9.0
10.0, 12.0,15.0V, Adjustable=AD )
PRODUCT DESCRIPTION
The LM2931 is a low power voltage regulator. This device excellent choice for use in battery powered.
Furthermore, the quiescent current increases only slightly at dropout, which prolongs battery life.
The LM2931 features very low quiescent current (100㎂ Typ.) and very low drop output voltage
(Typ. 60㎷ at light load and 300㎷ at 100㎃).
This includes a tight initial tolerance of 0.5% Typ., extremely good load and line regulation of 0.05% Typ.,
and very low output temperature coefficient.
The LM2931 fixed-voltage and andjustable regulators is offered in 3-pin TO-92 package compatible with
other fixed regulator.
BLOCK DIAGRAM AND TYPICAL APPLICATIONS
UNREGULATED DC
INPUT
+
--
+1.23V
REFERENCE
ERROR
AMPLIFIER
60KΩ
1
OUTPUT
GROUND
VOUT
100㎃
+ MAX
3.3㎌
HTC
Page 1

0.1A LOW DROPOUT VOLTAGE REGULATORS
LM2931
ABSOLUTE MAXIMUM RATINGS
POWER DISSIPATION
Lead Temperature (Soldering, 5 seconds)
Storage Temperature Range
Operating Junction Temperature Range
Input Supply Voltage
INTERNALLY LIMITED
260℃
-65℃ to +150℃
-55℃ to +150℃
-20 to +30V
ELECTRICAL CHARACTERISTICS(at Tj=25℃, Io=100㎂, Vin=14V, Co=100㎌ ; unless otherwise noted)
PARAMETER
CONDITIONS (Note 2)
MIN TYP MAX
UNITS
Output Voltage (Fixed Model)
Output Voltage (Fixed Model)
Input Supply Voltage
-25℃ ≤TJ ≤85℃
Full Operating Temperature
100㎂≤IL≤100㎃,TJ≤TJMAX
0.985|V0
0.980|V0
0.975|V0
V0
1.015|V0
1.020|V0
V0 1.025|V0
26
V
Output Voltage Temperature Coefficient
(Note 1)
50 150
ppm/℃
Line Regulation (Note 2)
Load Regulation (Note 2)
Dropout Voltage (Note 4)
Ground Current (Note 5)
Dropout Ground Current (Note 5)
Current Limit
Thermal Regulation (Note 6)
13V≤VIN≤26V (Note 3)
1mA≤IL≤100㎃
IL=10mA
IL=100㎃
IL=100㎂
IL=10㎃
IL=100㎃
VIN=V0-0.5V, IL=100㎂
VOUT=0
0.1
0.1
60
300
100
0.9
8
110
160
0.05
0.4
0.3
200
600
150
1.5
12
170
200
0.2
%
%
%/W
Output Noise, 10Hz to 100kHz IL = 10 mA
Shutdown Input
CL=2.2㎌
CL=3.3㎌
CL=33㎌
500
350 μVr㎳
120
Input Logic Voltage
Low (Regulator ON)
High (Regulator OFF)
1.3 0.7
2
V
Shutdown Pin Input Current
Regulator Output Current Shutdown
VS=2.4V
VS=26V
(Note 8)
5.0V≤VOUT<15.0V
3.3V≤VOUT<5.0V
2.0V≤VOUT<3.3V
30 50
450 600
10
20
30
Note 1 : Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the
total temperature range.
Note 2 : Regulations is measured at constant junction temperature, using pulse testing with a low duty cycle.
Changes in output voltage due to heating effects are covered under the specification for thermal regulation.
Note 3 : Line regulation is tested at 150℃ for IL = 1mA. For IL = 100㎂ and TJ = 125℃, line regulation is guaranteed by
value measured at 1V differential.
Note 4 : 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.
Note 5 : Ground pin current is the regulator quiescent current. The Total current drawn from the source is the sum of the
ground pin current and output load current.
Note 6 : Thermal Regulation is the change in output voltage at a time T after a change in power dissipation, excluding
load or line regulation effects. Specifications are for a 50mA load puls (1.25W) for T = 10ms
Note 7 : VREF≤VOUT≤(VIN-1V), 2.3V≤VIN≤26V, 100㎂≤IL≤100㎃, TJ≤TJMAX
Note 8 : Vshuntdown≥2V, V IN≤26V, Vout≤0V
HTC
2
Page 2
Part Number LM2931
Manufactur HTC
Description 0.1A LOW DROPOUT VOLTAGE REGULATORS
Total Page 2 Pages
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