GJ2137 [ETL]
7 5 0 m A 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;
| 型号： | GJ2137 |
| 厂家： | 
E-TECH ELECTRONICS LTD |
| 描述： | 7 5 0 m A 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 |
| 文件： | 总5页 (文件大小：403K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ISSUED DATE :2006/05/16
REVISED DATE :
GTM
CORPORATION
GJ2137
7 5 0 m A 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
Description
The GJ2137 series of positive, linear regulators feature low quiescent current (30ꢀA typ.) with low dropout
voltage, making them ideal for battery applications.
These rugged devices have both Thermal Shutdown, and Current Fold-back to prevent device failure under
the “Worst” of operating conditions.
The GJ2137 is stable with an output capacitance of 2.2ꢀF or greater.
Features
Functional Block Diagram
ԦVery Low Dropout Voltage
ԦGuaranteed 750mA output
ԦOver-Temperature Shutdown
ԦCurrent Limiting
ԦShort Circuit Current Fold-back
ԦHighly Accurate± 1.5%
ԦLow Temperature Coefficient
Applications
ԦBattery Powered Widgets
ԦInstrumentation
ԦWireless Devices
ԦPC Peripherals
ԦPortable Electronics
Package Dimensions
TO-252
Millimeter
Millimeter
Min.
0.50
2.20
0.45
0
0.90
5.40
0.80
REF.
REF.
Min.
Max.
6.80
5.50
7.20
3.00
Max.
0.70
2.40
0.55
0.15
1.50
5.80
1.20
A
B
C
D
E
F
6.40
5.20
6.80
2.40
G
H
J
K
L
2.30 REF.
0.70
0.60
0.90
0.90
M
R
S
Typical Application Circuit
GJ2137
Page: 1/5
ISSUED DATE :2006/05/16
REVISED DATE :
GTM
CORPORATION
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
V
Input Max Voltage
Output Current
Output Voltage
V
IN
OUT
OUT
8
I
1
1.5~3.8
-40 ~ +85
-40 ~ +125
150
A
V
V
Operating Ambient Temperature
Junction Temperature
Topr
Tj
к
к
Maximum Junction Temperature
Thermal Resistance
Tj Max
ꢁjc
к
60
к/W
W
Internal Power Dissipation (∆T=100к)
EDS Classification
PD
3
B
Electrical Characteristics
VIN=VOUT(T)+2V, Ta=25к unless otherwise noted
Parameter
Symbol
Condition
=1mA
Min
TYP
Max
Unit
VOUT(T)
VOUT(E)
I
O
-1.5%
1.5%
V
Output Voltage
(Note2)
(Note1)
V
O
>1.2V
750
-
850
0.2
-
-
-
mA
mA
%
I
O
Output Current
Current Limit
VO
>1.2V
750
I
LIM
V
IN=VOUT(T)+2V, I
O=1mA to 750mA
-1
1
Load Regulation
REGLOAD
1.4V<VOUT(T)≤2.0V
2.0V<VOUT(T)≤2.8V
2.8V<VOUT(T)
-
1400
800
600
50
I
O
=750mA
mV
Dropout Voltage
V
DROPOUT
-
-
V
O
=VOUT(E)-2%
-
-
V
IN= VOUT(T)+2V, I
O=0mA
-
-
30
35
-
ꢀA
ꢀA
I
Q
Quiescent Current
Ground Pin Current
V
IN= VOUT(T)+2V, I
O=1mA~750mA
-
I
GND
I =1mA
O
1.4V<VOUT(T)≤2.0V
-0.15
0.15
%
V
IN=VOUT(T)+1 to
Line Regulation
REGLINE
2.0V<VOUT(T)<4.0V
-0.1
0.02
-
0.1
V
OUT(T)+2
Note3
7
V
к
Input Voltage
VIN
Over Temperature Shutdown
Over Temperature Hysterisis
Vo Temperature Coefficient
Short Circuit Current
-
-
-
-
150
30
-
OTS
OTH
TC
-
-
к
30
ppm/к
mA
V
IN=VOUT(T)+1V, VOUT<0.8V
300
600
I
SC
f=1kHz
f=10kHz
f=100kHz
-
-
-
-
50
20
10
30
-
-
-
-
Io=100mA
Co=2.2ꢀF
dB
Power Supply Rejection
PSRR
f=10Hz~100kHz, Io=10mA, Co=2.2ꢀF
ꢀVrms
Output Voltage Noise
eN
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
GJ2137
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ISSUED DATE :2006/05/16
REVISED DATE :
GTM
CORPORATION
Ordering Information ( contd. )
Part Number
Marking
Output Voltage
1.5V
Part Number
GJ2137-18
Marking
Output Voltage
1.8V
7T152
XXXX
7T182
XXXX
GJ2137-15
7T252
XXXX
7T272
XXXX
GJ2137-25
GJ2137-28
GJ2137-30
GJ2137-33
GJ2137-35
GJ2137-3.7
GJ2137-2H
2.5V
2.8V
3.0V
3.3V
3.5V
3.7V
2.85V
GJ2137-27
GJ2137-29
GJ2137-31
GJ2137-34
GJ2137-36
GJ2137-38
2.7V
2.9V
3.1V
3.4V
3.6V
3.8V
7T282
XXXX
7T292
XXXX
7T302
XXXX
7T312
XXXX
7T332
XXXX
7T342
XXXX
7T352
XXXX
7T362
XXXX
7T372
XXXX
7T382
XXXX
7T2H2
XXXX
Detailed Description
The GJ2137 series of COMS regulators contain 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
150к, or the current exceeds 750mA. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120к.
The GJ2137 switches from voltage mode to current mode when the load exceeds the rated output current.
This prevents over-stress. The GJ2137 also incorporates current fold-back to reduce power dissipation when
the output is short circuited. This feature becomes active when the output drops below 0.8V and reduces the
current flow by 65%. Full current is restored when the voltage exceeds 0.8V.
External Capacitors
The GJ2137 is stable with an output capacitance to ground of 2.2ꢀF 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 0.1ꢀF ceramic capacitor with a 10ꢀF 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 0.1ꢀF 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.
GJ2137
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ISSUED DATE :2006/05/16
REVISED DATE :
GTM
CORPORATION
Characteristics Curve
GJ2137
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ISSUED DATE :2006/05/16
REVISED DATE :
GTM
CORPORATION
Important Notice:
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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:
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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
GJ2137
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