Datasheet > GJ2137-30

GJ2137-30

更新时间： 2022-02-26 10:15:35

品牌	Logo	应用领域
ETL		/
页数	文件大小	规格书
5页	403K
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

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GJ2137-30 数据手册

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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