Datasheet > RT7252AZSP

RT7252AZSP

更新时间： 2022-09-29 19:51:37

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
14页	249K
描述
IC REG BUCK ADJ 2A SYNC 8SOP

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数据手册

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RT7252AZSP 数据手册

RT7252A/B

Functional Pin Description

Pin No.

Pin Name

Pin Function

Switch Node. Connect to external L-C filter.

Input Supply Voltage. Must bypass with a suitably large ceramic

capacitor.

VIN

Bootstrap for High Side Gate Driver. Connect 0.01μF or greater ceramic

capacitor from BOOT to SW pin.

BOOT

Chip Enable. A logic-high enables the converter; a logic-low forces the

RT7252A/B into shutdown mode, reducing the supply current to less

than 5μA. Attach this pin to VIN with a 100kΩ pull up resistor for

automatic startup.

Feedback Input Pin. For an adjustable output, connect an external

resistive voltage divider to this pin.

Power Good Indicator with Open Drain. The output of this pin is pulled to

low when the FB is lower than 0.7V; otherwise it is high impedance. A

100kΩ pull-high resistor is needed.

PGOOD

Ground. The exposed pad must be soldered to a large PCB and

connected to GND for maximum power dissipation.

7, 9 (Exposed Pad)

GND

No Internal Connection.

Function Block Diagram

VIN

Internal

Regulator

OSC

340kHz/800kHz

Enable

Comparator

Slope Comp

2.5V

Current Sense

Amplifier

Foldback

Control

BOOT

155m

150m

OV Comparator

0.4V

0.8V

Current

Comparator

UV Comparator

Error Amp

PGOOD

GND

Comparator

35pF

400k

0.7V

1pF

PGOOD

is a registered trademark of Richtek Technology Corporation.

DS7252A/B-01 April 2012

www.richtek.com

1 234 5 6 7...14

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