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GE2138 の電気的特性と機能

GE2138のメーカーはGTMです、この部品の機能は「1.5A LOW DROPOUT VOLTAGE REGULATOR」です。


製品の詳細 ( Datasheet PDF )

部品番号 GE2138
部品説明 1.5A LOW DROPOUT VOLTAGE REGULATOR
メーカ GTM
ロゴ GTM ロゴ 




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GE2138 Datasheet, GE2138 PDF,ピン配置, 機能
www.DataSheet4U.com
ISSUED DATE :2006/04/14
REVISED DATE :
GE2138
1.5A CMOS Low Dropout Voltage Regulator
Description
The GE2138 series of positive, linear regulators feature low quiescent current (45 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 GE2138 is stable with an output capacitance of 4.7 F or greater.
Features
Very Low Dropout Voltage
Guaranteed 1.5A 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
Typical Application Circuit
REF.
A
b
c
D
E
L4
L5
Millimeter
Min. Max.
4.40 4.80
0.76 1.00
0.36 0.50
8.60 9.00
9.80 10.4
14.7 15.3
6.20 6.60
REF.
c1
b1
L
e
L1
Ø
A1
Millimeter
Min. Max.
1.25 1.45
1.17 1.47
13.25 14.25
2.54 REF.
2.60 2.89
3.71 3.96
2.60 2.80
GE2138
Page: 1/5

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GE2138 pdf, ピン配列
ISSUED DATE :2006/04/14
REVISED DATE :
Detailed Description
The GE2138 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 2.2A. During thermal shutdown, the output voltage remains low. Normal
operation is restored when the junction temperature drops below 120 .
The GE2138 behaves like a current source when the load reaches 2.2A. However, if the load impedance drops
below 0.3 , the current drops back to 600mA to prevent excessive power dissipation. Normal operation is
restored when the load resistance exceeds 0.75 .
External Capacitors
The GE2138 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 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.
Characteristics Curve
GE2138
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部品番号部品説明メーカ
GE2138

1.5A LOW DROPOUT VOLTAGE REGULATOR

GTM
GTM


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