ETL GSCLM2931 100ma low dropout adjustable voltage regulator Datasheet

ISSUED DATE :2006/03/24
REVISED DATE :
GSCLM 2931
100mA Low Dropout Adjustable Voltage Regulator
Description
The GSCLM2931 positive voltage regulator features a very low quiescent current of 1mA or less when supplying 10mA loads. This unique
characteristic and the extremely low input-output differential required for proper regulation (0.2V for output current of 10mA) make the
GSCLM2931 the ideal regulator for standby power system. Applications include memory standby circuits, COMS and other low power
processor power supplies as well as systems demanding as much as 100mA of output current.
Designed originally for automotive applications, the GSCLM2931 and all regulated circuitry are protected from reverse battery installations
or 2 battery jumps. During line transients, such as a load dump(60V) when the input voltage to the regulator can momentarily exceed the
specified maximum operating voltage, the regulator will automatically shut down to protect both internal circuits and the load. The
GSCLM2931 cannot be harmed by temporary mirror-image insertion. Familiar regulator features such as short circuit and thermal overload
protection are also provided.
Features
Input-to-Output Voltage Differential of Less Then 0.6 V at 100mA
60V Load Dump Protection
-50 V Reverse Transient Protection
Internal Current Limiting with Thermal Shutdown
Temporary Mirror-Image Protection
Package Dimensions
REF.
A
B
C
D
E
F
Millimeter
Min.
Max.
5.80
4.80
3.80
0°
0.40
0.19
6.20
5.00
4.00
8°
0.90
0.25
REF.
M
H
L
J
K
G
Millimeter
Min.
Max.
0.10
0.25
0.35
0.49
1.35
1.75
0.375 REF.
45°
1.27 TYP.
Typical Applications
Vout = Vref * (1+R2/R1) + IAdj * R2
GSCLM2931
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ISSUED DATE :2006/03/24
REVISED DATE :
Absolute Maximum Ratings
Parameter
Input Voltage
Input Voltage t 100ms
Output Current
Storage Temperature
Junction Temperature
Resistance Junction-Ambient
Symbol
Vi
Vi(t)
IO
TSTG
TJ
R JA
Ratings
-15 ~ 40
-50 ~ 60
100
-60 ~ +150
-40 ~ +125
160
Unit
V
V
mA
/W
Electrical Characteristics
VIN=14V, VOUT=3V, IO=10mA, TJ=25
Parameter
Reference voltage
Output voltage
Line regulation
Load regulation
Consumption current
, Ci=0.1uF, Co=100uF, R1=27k (unless otherwise specified)
Symbol
VREF
Conditions
IO=10mA
IO 100mA, -40
TJ 125
Measure from VOUT to Adj Pin
VOUT
RegLine VOUT+0.6V VIN 26V
RegLoad 5mA IO 100mA
IO=10mA
IB
IO=100mA
Output is “off” (Vth(OI)=2.5V)
Adjustment current
IAdj
Dropout voltage
Vds
IO=10mA
IO=100mA
IO=1mA, f=10Hz~100kHz
f=10Hz~100kHz
f=120Hz
Output Impedance
ZO
Noise voltage on output
Vn
Pulse-smoothing ratio
RR
Temporary unstability of
S
output voltage
Maximum input voltage
Vth(OV)
threshold
Output voltage at
-VO VIN=-15V
negative input voltage
Output is “ON”
Voltage threshold of
Vth(OI)
disconnection output
Output is “OFF”
Disconnection output
Ith(OI) Vth(OI)=2.5V
current
Min
1.14
Typ
1.20
Max
12.6
Unit
V
1.08
1.32
V
3
-
6
0.2
V
mV/V
%
-
-
0.1
40
140
-
24
1.5
1.0
1.0
1.0
0.2
0.6
-
m /V
mV/V
%/V
-
0.4
-
%/1000hr
26
-
40
V
-0.3
-
-
V
2.5
-
1.9
-
V
-
-
50
uA
mA
uA
V
Definition of Terms
Dropout Voltage: The input-output voltage differential at which the circuit ceases to regulate against further reduction in input voltage.
Measured when the output voltage has dropped 100mV from the nominal value obtained at 14V input, dropout voltage is dependent upon
load current and junction temperature.
Input Voltage: The DC voltage applied to the input terminals with respect to ground.
Input-Output Differential: The voltage difference between the unregulated input voltage and the regulated output voltage for which the
regulator will operate.
Line Regulation: The change in output voltage for a change in the input voltage. The measurement is made under conditions of low
dissipation or by using pulse techniques such that the average chip temperature is not significantly affected.
Load Regulation: The change in output voltage for a change in load current at constant chip temperature.
Long Term Stability: Output voltage stability under accelerated life-test conditions after 1000 hours with maximum rate voltage and
junction temperature.
Output Noise Voltage: The rms AC voltage at the output, with constant load and no input ripple, measured over a specified frequency
range.
Quiescent Current: That part of the positive input current that does not contribute to the positive load current. The regulator ground lead
current.
Ripple Rejection: The ratio of the peak-to-peak input ripple voltage to the peak-to-peak output ripple voltage at a specified frequency.
GSCLM2931
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ISSUED DATE :2006/03/24
REVISED DATE :
Typical Performance Characteristics
GSCLM2931
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ISSUED DATE :2006/03/24
REVISED DATE :
Important Notice:
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM.
GTM reserves the right to make changes to its products without notice.
GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems.
GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
Head Office And Factory:
Taiwan: No. 17-1 Tatung Rd. Fu Kou Hsin-Chu Industrial Park, Hsin-Chu, Taiwan, R. O. C.
TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785
China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China
TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165
GSCLM2931
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