Datasheet > ADP197

ADP197

更新时间： 2022-10-09 10:08:53

品牌	Logo	应用领域
亚德诺 - ADI		开关电源开关手机
页数	文件大小	规格书
16页	252K
描述
5 V, 3 A Logic Controlled High-Side Power Switch Mobile phones

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ADP197 数据手册

ADP197

THEORY OF OPERATION

on and off is controlled by the enable input, EN, which is capable of

interfacing directly with 1.8 V logic signals.

VIN

VOUT

GND

The ADP197 is capable of 3 A of continuous current as long as T_J

is less than 70°C. At 85°C, the rated current drops to 2.22 A.

CHARGE PUMP

AND SLEW RATE

CONTROL

The overtemperature protection circuit activates if the load cur-

rent causes the junction temperature to exceed 125°C. When

this occurs, the overtemperature protection circuitry disables

the output until the junction temperature falls below approximately

110°C, at which point the output is reenabled. If the fault condition

persists, the output cycles off and on until the fault is removed.

OVERTEMPERATURE

PROTECTION

ADP197

Figure 23. Functional Block Diagram

The ADP197 is a high-side NMOS load switch, controlled by an

internal charge pump. The APD197 is designed to operate with

power supply voltages between 1.8 V and 5.5 V.

ESD protection structures are shown in the block diagram as Zener

diodes.

The ADP197 is a low quiescent current device with a nominal

4 MΩ pull-down resistor on its enable pin (EN). The package is a

space-saving 1.0 mm × 1.5 mm, 6-ball WLCSP.

An internal charge pump biases the NMOS switch to achieve a

relatively constant, ultralow on resistance of 12 mΩ across the

entire input voltage range. The use of the internal charge pump

also allows for controlled turn-on times. Turning the NMOS switch

Rev. 0 | Page 10 of 16

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