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VOLTAGE REGULATOR. GJ2137 Datasheet

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VOLTAGE REGULATOR. GJ2137 Datasheet






GJ2137 REGULATOR. Datasheet pdf. Equivalent




GJ2137 REGULATOR. Datasheet pdf. Equivalent





Part

GJ2137

Description

750mA LOW DROPOUT VOLTAGE REGULATOR



Feature


www.DataSheet4U.com ISSUED DATE :2006/05 /16 REVISED DATE : GJ2137 Description 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 The GJ2 137 series of positive, linear regulato rs feature low quiescent current (30 A typ.) with low dropout voltage, making them ideal for battery applications. Th ese rugged devices have both Thermal Sh utdown, and Curren.
Manufacture

GTM

Datasheet
Download GJ2137 Datasheet


GTM GJ2137

GJ2137; t Fold-back to prevent device failure un der the “Worst” of operating condit ions. The GJ2137 is stable with an outp ut capacitance of 2.2 F or greater. Fe atures Very Low Dropout Voltage Guaran teed 750mA output Over-Temperature Shut down Current Limiting Short Circuit Cur rent Fold-back Highly Accurate± 1.5% L ow Temperature Coefficient Functional Block Diagram Applicat.


GTM GJ2137

ions Battery Powered Widgets Instrument ation Wireless Devices PC Peripherals P ortable Electronics Package Dimensions TO-252 REF. A B C D E F S Millimeter Min. Max. 6.40 6.80 5.20 5.50 6.80 7.2 0 2.40 3.00 2.30 REF. 0.70 0.90 0.60 0. 90 REF. G H J K L M R Millimeter Min. Max. 0.50 0.70 2.20 2.40 0.45 0.55 0 0 .15 0.90 1.50 5.40 5.80 0.80 1.20 Typi cal Application Ci.


GTM GJ2137

rcuit GJ2137 Page: 1/5 ISSUED DATE :2 006/05/16 REVISED DATE : Absolute Maxi mum Ratings Parameter Input Max Voltage Output Current Output Voltage Operatin g Ambient Temperature Junction Temperat ure Maximum Junction Temperature Therma l Resistance Internal Power Dissipation ( T=100 ) EDS Classification Symbol V IN IOUT VOUT Topr Tj Tj Max jc PD Rati ngs 8 1 1.5~3.8 -4.

Part

GJ2137

Description

750mA LOW DROPOUT VOLTAGE REGULATOR



Feature


www.DataSheet4U.com ISSUED DATE :2006/05 /16 REVISED DATE : GJ2137 Description 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 The GJ2 137 series of positive, linear regulato rs feature low quiescent current (30 A typ.) with low dropout voltage, making them ideal for battery applications. Th ese rugged devices have both Thermal Sh utdown, and Curren.
Manufacture

GTM

Datasheet
Download GJ2137 Datasheet




 GJ2137
www.DataSheet4U.com
ISSUED DATE :2006/05/16
REVISED DATE :
GJ2137
750m A CMO S Low Dropou t Vol tag e Regu lato r
Description
The GJ2137 series of positive, linear regulators feature low quiescent current (30 A 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 2.2 F or greater.
Features
Very Low Dropout Voltage
Guaranteed 750mA output
Over-Temperature Shutdown
Current Limiting
Short Circuit Current Fold-back
Highly Accurate± 1.5%
Low Temperature Coefficient
Functional Block Diagram
Applications
Battery Powered Widgets
Instrumentation
Wireless Devices
PC Peripherals
Portable Electronics
Package Dimensions
TO-252
Typical Application Circuit
REF.
A
B
C
D
E
F
S
Millimeter
Min. Max.
6.40 6.80
5.20 5.50
6.80 7.20
2.40 3.00
2.30 REF.
0.70 0.90
0.60 0.90
REF.
G
H
J
K
L
M
R
Millimeter
Min. Max.
0.50 0.70
2.20 2.40
0.45 0.55
0 0.15
0.90 1.50
5.40 5.80
0.80 1.20
GJ2137
Page: 1/5




 GJ2137
ISSUED DATE :2006/05/16
REVISED DATE :
Absolute Maximum Ratings
Parameter
Input Max Voltage
Output Current
Output Voltage
Operating Ambient Temperature
Junction Temperature
Maximum Junction Temperature
Thermal Resistance
Internal Power Dissipation ( T=100 )
EDS Classification
Symbol
VIN
IOUT
VOUT
Topr
Tj
Tj Max
jc
PD
Ratings
8
1
1.5~3.8
-40 ~ +85
-40 ~ +125
150
60
3
B
Unit
V
A
V
/W
W
Electrical Characteristics VIN=VOUT(T)+2V, Ta=25 unless otherwise noted
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
Vo Temperature Coefficient
Short Circuit Current
Power Supply Rejection
Output Voltage Noise
Symbol
VOUT(E)
(Note1)
IO
ILIM
REGLOAD
VDROPOUT
IQ
IGND
REGLINE
VIN
OTS
OTH
TC
ISC
PSRR
eN
Condition
IO=1mA
VO>1.2V
VO>1.2V
VIN=VOUT(T)+2V, IO=1mA to 750mA
IO=750mA
VO=VOUT(E)-2%
1.4V<VOUT(T) 2.0V
2.0V<VOUT(T) 2.8V
2.8V<VOUT(T)
VIN= VOUT(T)+2V, IO=0mA
VIN= VOUT(T)+2V, IO=1mA~750mA
IO=1mA
1.4V<VOUT(T) 2.0V
VIN=VOUT(T)+1 to
VOUT(T)+2
2.0V<VOUT(T)<4.0V
VIN=VOUT(T)+1V, VOUT<0.8V
Io=100mA
Co=2.2 F
f=1kHz
f=10kHz
f=100kHz
f=10Hz~100kHz, Io=10mA, Co=2.2 F
Min
-1.5%
750
750
-1
-
-
-
-
-
TYP
VOUT(T)
(Note2)
-
850
0.2
-
-
-
30
35
-0.15
-
-0.1 0.02
Note3
-
-
-
-
-
-
-
-
-
150
30
30
300
50
20
10
30
Max
1.5%
-
-
1
1400
800
600
50
-
0.15
0.1
7
-
-
-
600
-
-
-
-
Unit
V
mA
mA
%
mV
A
A
%
V
ppm/
mA
dB
Vrms
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
Page: 2/5




 GJ2137
ISSUED DATE :2006/05/16
REVISED DATE :
Ordering Information ( contd. )
Part Number
GJ2137-15
GJ2137-25
GJ2137-28
GJ2137-30
GJ2137-33
GJ2137-35
GJ2137-3.7
GJ2137-2H
Marking
7T152
XXXX
7T252
XXXX
7T282
XXXX
7T302
XXXX
7T332
XXXX
7T352
XXXX
7T372
XXXX
7T2H2
XXXX
Output Voltage
1.5V
2.5V
2.8V
3.0V
3.3V
3.5V
3.7V
2.85V
Part Number
GJ2137-18
GJ2137-27
GJ2137-29
GJ2137-31
GJ2137-34
GJ2137-36
GJ2137-38
Marking
7T182
XXXX
7T272
XXXX
7T292
XXXX
7T312
XXXX
7T342
XXXX
7T362
XXXX
7T382
XXXX
Output Voltage
1.8V
2.7V
2.9V
3.1V
3.4V
3.6V
3.8V
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
150 , or the current exceeds 750mA. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120 .
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 2.2 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 10 F 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.
GJ2137
Page: 3/5






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