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VOLTAGE REGULATOR. GSC2117 Datasheet

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VOLTAGE REGULATOR. GSC2117 Datasheet






GSC2117 REGULATOR. Datasheet pdf. Equivalent




GSC2117 REGULATOR. Datasheet pdf. Equivalent





Part

GSC2117

Description

CMOS POSITIVE VOLTAGE REGULATOR

Manufacture

GTM

Datasheet
Download GSC2117 Datasheet


GTM GSC2117

GSC2117; www.DataSheet4U.com ISSUED DATE :2006/04 /12 REVISED DATE : G S C 2 11 7 Descri ption 7 5 0 m A C M O S P o s i t i v e Vo l t a g e R e g u l a t o r The G SC2117 of positive, linear regulators f eature low quiescent current (45 A typ. ) with low dropout voltage, making then ideal for battery applications. Output voltages are set at the factory and tr immed to 1.5% accu.


GTM GSC2117

racy. These rugged devices have both The rmal Shutdown, and Current Fold-back to prevent device failure under the “Wo rst” of operating conditions. The GSC 2117 is stable with an output capacitan ce of 4.7 F or greater. Features Appl ications Very Low Dropout Voltage Guar anteed 750mA output Over-Temperature Sh utdown Current Limiting Short Circuit C urrent Fold-back Low T.


GTM GSC2117

emperature Coefficient Noise Reduction B ypass Capacitor Power-saving Shutdown M ode Adjustable Version Functional Bloc k Diagram Package Dimensions Battery Powered Widgets Instrumentation Wireles s Devices PC Peripherals Portable Elect ronics REF. A B C D E F Millimeter Mi n. 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 Mi.



Part

GSC2117

Description

CMOS POSITIVE VOLTAGE REGULATOR

Manufacture

GTM

Datasheet
Download GSC2117 Datasheet




 GSC2117
www.DataSheet4U.com
ISSUED DATE :2006/04/12
REVISED DATE :
GSC2117
750m A CMOS Po si ti ve Vol tag e Regu l ato r
Description
The GSC2117 of positive, linear regulators feature low quiescent current (45 A typ.) with low dropout voltage,
making then 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.
The GSC2117 is stable with an output capacitance of 4.7 F or greater.
Features
Very Low Dropout Voltage
Guaranteed 750mA output
Over-Temperature Shutdown
Current Limiting
Short Circuit Current Fold-back
Low Temperature Coefficient
Noise Reduction Bypass Capacitor
Power-saving Shutdown Mode
Adjustable Version
Applications
Battery Powered Widgets
Instrumentation
Wireless Devices
PC Peripherals
Portable Electronics
Package Dimensions
Functional Block Diagram
Typical Application Circuit
REF.
A
B
C
D
E
F
Millimeter
Min. Max.
5.80
6.20
4.80
5.00
3.80
4.00
0° 8°
0.40
0.90
0.19
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.
GSC2117
Page: 1/7





 GSC2117
ISSUED DATE :2006/04/12
REVISED DATE :
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
Input Max Voltage
VIN 8
V
Output Current
IOUT
PD/( VIN- VO)
mA
Output Voltage
VOUT
Gnd-0.3 to VIN+0.3
V
Operating Ambient Temperature
Topr -40 ~ +85
Junction Temperature
Tj -40 ~ +125
Maximum Junction Temperature
Internal Power Dissipation( T=100 )
Tj Max
PD
150
810
mW
EDS Classification
B
Electrical Characteristics TA=25 unless otherwise noted
(VIN=VOUT (T) + 2V, VEN=VIN, CIN=1uF, COUT=4.7uF)
Parameter
Symbol
Condition
Min TYP Max Unit
Output Voltage
Output Current
Current Limit
Short Circuit Current
VOUT(E)
(Note1)
IO
ILIM
ISC
IO=1mA, VIN=VOUT(T)+2V
VO>1.2V
VO>1.2V
VIN=VOUT(T)+1V, VO < 0.4V
-1.5
VOUT(T)
(Note2)
750 -
750 -
- 750
1.5
-
-
-
%
mA
mA
mA
Load Regulation
REGLOAD
VIN=VOUT(T)+2V, IO=1mA to 750mA
-1
0.2
1
%
Dropout Voltage
Quiescent Current
Ground Pin Current
VDROPOUT
IQ
IGND
IO=750mA
VO=VOUT(E)-2%
VOUT(T)=1.5V
VOUT(T)=1.8V
VOUT(T) 2.0V
VIN=VOUT(T)+2V, IO=0mA
VIN=VOUT(T)+2V, IO=1mA to 750mA
-
-
-
-
-
- 1000
- 650 mV
- 500
45 70
A
45 -
A
Line Regulation
REGLINE
IO=1mA
VIN=VOUT(T)+1 to
VOUT(T)+2
VOUT(T)<2.0V
2.0V VOUT(T)<4.0V
4.0V VOUT(T)
-0.15
-0.1
-0.4
-
0.02
-
0.15
0.1
0.4
%
Input Voltage
Over Temperature Shutdown
VIN
OTS
Note3
-
-
150
7
-
V
Over Temperature Hysterisis
OTH
- 30 -
Output Voltage
Temperature Coefficient
ADJ Input Bias Current
Minimum Load Current
TC
IADJ
ILoad
VIN=2.5V
- 30 - ppm/
-1-
A
- - 70 A
ADJ Reference Voltage
VREF
1.221 1.240 1.26
V
Power Supply Rejection
PSRR
Io=100mA
Co=4.7 F
(ceramic)
f=1kHz
f=10kHz
f=100kHz
- 75 -
- 55 -
- 30 -
dB
Output Voltage Noise
eN f=10Hz~100kHz, Io=10mA, Co=4.7 F - 30 - Vrms
EN Input Threshold
VEH
VEL
VIN=2.7V to 7V
VIN=2.7V to 7V
2.0 - VIN
V
0
- 0.4
V
EN Input Bias Current
IEH
IEL
VEN=VIN, VIN=2.7V to 7V
VEN= 0V, VIN=2.7V to 7V
- -1
- -1
A
A
Shutdown Supply Current
ISD
VIN=5V, VO=0V, VEN<VEL
- 0.5 2
A
Note 1: VOUT (E) =Effective Output Voltage (i.e. the output voltage when “VOUT (T) + 2.0V” is provided at the VIN pin while maintaining a
certain IOUT value).
2: VOUT (T) =Specified Output Voltage
3: VIN (MIN) =VOUT+VDROPOUT
GSC2117
Page: 2/7





 GSC2117
ISSUED DATE :2006/04/12
REVISED DATE :
Ordering Information ( contd. )
Part Number
GSC2117-AD
Marking
7AAD2
XXXX
Output Voltage
Adjustable
Part Number
Marking
Output Voltage
Detailed Description
The GSC2117 of COMS regulator contains a PMOS pass transistor, voltage reference, error amplifier, over-
current protection, and thermal shutdown.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal
protection circuits. During normal operation, the error amplifier compares the output voltage to a precision
reference. Over-current and Thermal shutdown circuits become active when the junction temperature exceeds
140 , or the current exceeds 2.2A. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120 .
The GSC2117 behaves like a current source when the load reaches 2.2A. However, if the load impedance
drops below 0.3ohms, the current drops back to 600mA to prevent excessive power dissipation. Normal
operation is restored when the load resistance exceeds 0.75ohms.
External Capacitors
The GSC2117 is stable with an output capacitance to ground of 4.7 F or greater. Ceramic capacitors have the
lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the
highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are
comparatively expensive. One option is to parallel a 0.1 F ceramic capacitor with a 10uF Aluminum Electrolytic.
The benefit is low ESR, high capacitance, and low overall cost.
A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should
be at least 0.1 F to have a beneficial effect.
All capacitors should be placed in close proximity to the pins. A “Quiet” ground termination is desirable. This
can be achieved with a “Star” connection.
Enable
When EN pin is pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In
this state, the quiescent current is less than 2 A. This pin behaves much like an electronic switch.
100K resistor is necessary between VEN source and EN pin when VEN is high than VIN.
(Note: There is no internal pull-up for EN pin. It can not be floating.)
Adjustable Version
The adjustable version uses external feedback resistors to generate an output voltage anywhere from 1.5V to
5.0V. Vadj is trimmed to 1.24V and Vout is given by the equation:
VOUT=Vadj * (1+R1/R2)
Feedback resistors R1 and R2 should be high enough to keep quiescent current low, but increasing R1+R2 will
reduce stability. In general, R1 and R2 in the 10’s of k will produce adequate stability, given reasonable
layout precautions. To improve stability characteristics, keep parasitic on the ADJ pin to minimum, and lower
R1 and R2 values.
GSC2117
Page: 3/7



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