GTM GSC103

Pb Free Plating Product
ISSUED DATE :2005/10/26
REVISED DATE :
GSC103
D u a l O P - AM P an d 2 . 5V ±0. 7 % Vo l ta g e R ef e r en c e
Description
The GSC103 consists of 2 low-offset voltage amplifiers and a high-accuracy 2.5V voltage reference in SOP-8
package. The GSC103 provides a low cost and space saving solution for the application such as power supply
and switching adapters.
The GSC103 is available in a SOP-8 package. It can operate over the ambient temperature range from -40
to 105 .
Features
Precision ±0.7% Voltage Reference
Vref sinking Current Capability:1mA to 100mA
Low input Offset Voltage
Max. 27V Voltage Rating
Applications
Switching Power Supply
Adapter
Portable Device
Package Dimensions
REF.
A
B
C
D
E
F
Typical Circuit
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.
Block Diagram
GSC103
Fig 1. CC/CV Control for Switching Adapters
GSC103
Page: 1/4
ISSUED DATE :2005/10/26
REVISED DATE :
Pin Descriptions
Pin
1
2
3
4
5
6
7
8
Name
OUT1
IN1IN1+
GND
IN2+
IN2OUT2
VCC
Function
Output of Op-amp 1
Negative terminal of Op-amp 1
Positive terminal of Op-amp 1, connected to internal reference voltage
Ground
Positive terminal of Op-amp 2
Negative terminal of Op-amp 2
Output of Op-amp 2
Supply voltage
Absolute Maximum Ratings
Parameter
Supply Voltage VCC
Differential Input Voltage(IN1+ to IN1-, IN2+ to IN2-)
Input Voltage
Maximum Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
Lead Temperature (PB Free, 10sec)
Junction-to-Ambient Thermal Resistance
ESD Level (Human Body Model)
Ratings
27
27
-0.3 ~ VCC+0.3V
150
-40 ~ + 105
-65 ~ + 150
260
160
2k
Unit
V
V
V
/W
V
Caution:
Stresses beyond the ratings in “Absolute maximum ratings” may cause permanent damage to the device. This is a stress only rating and
operation of device at these or any other conditions above those indicated in the operational sections of this specification is not limited.
Electrical Characteristics
Parameter
Test Conditions
VCC=5V, -40 ~105
Total Supply Current (No Load)
VCC=27V, -40 ~105
(VCC=+5V, TA=+25 unless otherwise stated)
Parameter
OP-Amp1 & OP-Amp2
Input Offset Voltage
(Common mode Voltage=0V)
Input Offset Voltage Drift
Input Bias Current (OP1)
Test Conditions
25
-40 ~105
25
25
Input Bias Current (OP2)
-40 ~105
VCC=15V, VO=2V
Output Source Current
Differential Input Voltage=1V
VCC=15V, VO=2V
Differential Input Voltage=-1V
Output Sink Current
VCC=15V, VO=0.2V
Differential Input Voltage=-1V
Output Short Current
VCC=15V
VCC=27V, RL=2k , 25
VCC=27V, RL=2k , -40 ~105
Output Voltage – High Level
VCC=27V, RL=10k , 25
VCC=27V, RL=10k , -40 ~105
RL=10k , 25
Output Voltage – Low Level
RL=10k , -40 ~105
Common mode Voltage=0V
Large Signal Voltage Gain (OP1) VCC=15V, RL=2k
VO=1.4V~11.4V, -40 ~105
VCC=15V, RL=2k , VO=1.4V~11.4V, 25
Large Signal Voltage Gain (OP2)
VCC=15V, RL=2k , VO=1.4V~11.4V, -40 ~105
GSC103
Min
Typ
Max
Unit
-
0.7
-
1.2
2
mA
Min
Typ
Max
Unit
-
1
7
20
20
-
4
5
150
200
20
40
-
mA
10
-
-
mA
12
50
-
A
23
23
24
24
-
40
24
25
5
-
60
20
20
mA
-
100
-
V/mV
50
25
100
-
-
V/mV
mV
V/
nA
nA
V
mV
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ISSUED DATE :2005/10/26
REVISED DATE :
Slew Rate at Unity Gail
VIN=0.5V~2V, VCC=15V
RL=2k , CL=100pF, Unity Gain
Common mode Voltage=0V, VCC=5~27V
VCC=27V, RL=2k , CL=100pF, f=100kHz, VIN=10mV
VCC=27V, RL=2k , CL=100pF
VO=2VPP, f=1kHz, AV=20dB
0.2
0.4
-
V/ S
65
0.5
100
0.9
-
dB
MHz
-
0.02
-
%
0
0
70
60
-
2
85
50
75
150
VCC-1.5
VCC-2
-
Reference Voltage (IK=10mA)
1
2.482
2.465
2.500
2.500
100
2.518
2.535
mA
25
-40 ~105
Reference Input Voltage Deviation
Over Temperature Range(IK=10mA)
-40 ~105
-
7
30
mV
-
0.5
1
mA
-
0.2
0.5
Supply Voltage Rejection Ratio
Gain Bandwidth Product
Total Harmonic Distortion
OP-Amp2
Input Offset Current
Input Common Mode Voltage
Range
Common Mode Rejection Ratio
Equivalent Input Noise Voltage
Reference Voltage
Cathode Current
25
-40 ~105
VCC=27V, 25
VCC=27V, -40 ~105
25
-40 ~105
f=1kHz, RS=100 ,VCC=27V
Minimum Cathode Current for
Regulator
Dynamic Impedance
GSC103
IK=1~100mA, f<1kHz
-
-
nA
V
dB
nV/
Hz
V
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ISSUED DATE :2005/10/26
REVISED DATE :
Application Information—CC/CV Control for Switching Adapters
GSC103
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
GSC103
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