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GJ2137 の電気的特性と機能

GJ2137のメーカーはGTMです、この部品の機能は「750mA LOW DROPOUT VOLTAGE REGULATOR」です。


製品の詳細 ( Datasheet PDF )

部品番号 GJ2137
部品説明 750mA LOW DROPOUT VOLTAGE REGULATOR
メーカ GTM
ロゴ GTM ロゴ 




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GJ2137 Datasheet, GJ2137 PDF,ピン配置, 機能
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

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GJ2137 pdf, ピン配列
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
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共有リンク

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部品番号部品説明メーカ
GJ2137

750mA LOW DROPOUT VOLTAGE REGULATOR

GTM
GTM
GJ2138

1.5 A LOW DROPOUT VOLTAGE REGULATOR

GTM
GTM


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