ISSUED DATE :2005/06/21
REVISED DATE :2005/10/04B
GSC2129
Description
C M O S L o w D r o p o u t Vo l t a g e R e g u l a t o r
The GSC2129 series of positive, linear regulators feature low quiescent current (45 A typ.) with low dropout
voltage, making them ideal for battery applications.
Output voltages are set at the factory and trimmed to 1.5% accuracy.
These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under
the “Worst” of operating conditions.
In applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and Ground.
The GSC2129 is stable with an output capacitance of 4.7 F or greater.
Features
&
Low Dropout Voltage
Very
Functional Block Diagram
Applications
&
Battery Powered Widgets
&Instrumentation
&Wireless Devices
&PC Peripherals
&Portable Electronics
&Guaranteed 1.55A output
&Over-Temperature Shutdown
&Current Limiting
&Highly Accurate± 1.5%
&Low Temperature Coefficient
‡
&Noise Reduction Bypass Capacitor
&Power-Saving Shutdown Mode
Package Dimensions
REF.
A
B
C
D
E
F
Millimeter
Min.
Max.
5.80
4.80
3.80
0C
0.40
0.19
6.20
5.00
4.00
8C
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 C
1.27 TYP.
Typical Application Circuit
1/6
ISSUED DATE :2005/06/21
REVISED DATE :2005/10/04B
Absolute Maximum Ratings
Parameter
Input Max Voltage
Output Current
Output Voltage
Operating Ambient Temperature
Junction Temperature
Maximum Junction Temperature
Thermal Resistance
Internal Power Dissipation(
EDS Classification
*Assuming a heat sink capable of twice times (
jc)
**Estimated
Symbol
V
IN
I
OUT
V
OUT
Topr
Tj
Tj
Max
jc
PD
Ratings
8
P
D
/( V
IN-
V
O)
1.5~5.0
-40 ~ +85
-40 ~ +125
150
20**
2.5
B
Unit
V
A
V
:
: /W
W
T=100 : )*
Electrical Characteristics
V
IN
=V
OUT
(T)+2V, V
EN
=V
IN
, T
A
=25 : unless otherwise
Parameter
Output Voltage
Output Current
Current Limit
Load Regulation
Dropout Voltage
Quiescent Current
Ground Pin Current
Line Regulation
Input Voltage
Over Temperature Shutdown
Over Temperature Hysterisis
Symbol
V
OUT
(E)
(Note1)
Condition
I
O
=1mA
V
OUT
>1.2V
V
OUT
>1.2V
I
O
=1mA to 1.5A
1.5V<V
OUT
(T)
I
O
=1.55A
V
O
=V
OUT
(E)-2% 2.0V<V
OUT
(T)
I
O
=0mA
I
O
=1mA~1.5A
I
O
=1mA
V
IN
=V
OUT
(T)+1 to
V
OUT
(T)+2
V
OUT
(T)<2.0V
2.0V V
OUT
(T)
2.0V
2.8V
Min
-1.5%
1.55
1.55
-1
-
-
-
-
-
-
-
Note3
-
-
-
Typ
V
OUT
(T)
(Note2)
Max
1.5%
-
-
1
1000
800
600
70
-
0.15
0.1
7
-
-
-
-
-
-
-
-
-
-
-
V
IN
0.4
0.1
0.5
-
2
Unit
V
A
A
%
mV
A
A
%
V
:
:
ppm/ :
dB
I
O
I
LIM
REG
LOAD
V
DROPOUT
I
Q
I
GND
REG
LINE
V
IN
OTS
OTH
TC
PSRR
-
2.0
0.2
-
-
-
45
45
-
0.02
-
150
30
30
50
20
15
75
55
30
30
30
-
-
-
-
30
0.5
2.8V<V
OUT
(T)
Output Voltage
Temperature Coefficient
Power Supply Rejection
Io=100mA
Co=4.7 F
ceramic
Io=100mA
Co=4.7 F
ceramic
C
BYP
=0.01 F
Power Supply Rejection
Output Voltage Noise
Output Voltage Noise
EN
Input
Threshold
EN
Input
Bias Current
Shutdown Supply Current
PSRR
eN
eN
V
EH
V
EL
I
EH
I
EL
I
SD
f=1kHz
f=10kHz
f=100kHz
f=1kHz
F=10kHz
f=100kHz
-
-
-
-
-
-
-
-
2.0
0
-
-
-
-
dB
f=10Hz~100kHz
Io=10mA,
Co=4.7 F
C
BYP
=0 F
f=10Hz~100kHz
Io=10mA,
Co=4.7 F
C
BYP
=0.01 F
V
IN
=2.7V to 7V
V
IN
=2.7V to 7V
V
EN
=V
IN
, V
IN
=2.7V to 7V
V
EN
= 0V, V
IN
=2.7V to 7V
V
IN
=5.0V, V
O
=0, V
EN
<V
EL
V
IN
=2.5V, V
O
=0, V
EN
<V
EL
Vrms
Vrms
V
V
A
A
A
A
2/6
ISSUED DATE :2005/06/21
REVISED DATE :2005/10/04B
Note 1: V
OUT
(E) =Effective Output Voltage (i.e. the output voltage when “V
OUT
(T) + 2.0V” is provided at the VIN pin while maintaining a
certain I
OUT
value).
2: V
OUT
(T) =Specified Output Voltage
3: V
IN
(MIN)
=V
OUT
+V
DROPOUT
Ordering Information ( contd. )
Part Number
GSC2129-15
GSC2129-25
GSC2129-47
XXXX
XXXX
XXXX
Marking
9B152
9B252
9B472
Output Voltage
1.5V
2.5V
4.75V
Part Number
GSC2129-18
GSC2129-33
GSC2129-50
XXXX
XXXX
XXXX
Marking
9B182
9B332
9B502
Output Voltage
1.8V
3.3V
5.0V
Characteristics Curve
3/6
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