Datasheet > MP38875

MP38875

更新时间： 2024-04-09 19:01:19

品牌	Logo	应用领域
芯源 - MPS		栅驱动驱动器
页数	文件大小	规格书
14页	589K
描述
15A, 16V, 800kHz 降压变换器，具有同步栅级驱动器

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MP38875 数据手册

MP38875 – 15A, 16V, 800kHz STEP-DOWN WITH SYNCHRONOUS GATE DRIVER

PIN FUNCTIONS

Pin #

Name

Description

VCC

BG Driver Bias Supply. Decouple with a 1µF ceramic capacitor.

Timing output to drive another MP38875 (or similar device) SYNCIN for phase-shift

operation.

SYNCOUT

SYNCIN External Frequency Synchronization. Connect to GND if not used.

EN On/Off Control.

SS/TRK Soft-Start/Track Input. Connect a capacitor to ground.

Feedback. An external resistor divider from the output to GND, tapped to the FB pin,

sets the output voltage. To prevent current limit run away during a short circuit fault

condition the frequency foldback comparator lowers the oscillator frequency when the

FB voltage is below 400mV.

COMP

Compensation. Connect R/C network to ground.

Power Good Indicator. Connect this pin to V_CCor V_OUTby a 100kꢀ pull-up resistor.

The output of this pin is an open drain if the output voltage is within 10% of the

nominal voltage, otherwise it is LOW. If PG is initially at open drain, there is a 20µs

delay to pull PG if the output voltage is less than 10% regulation window.

Bootstrap. This capacitor is needed to drive the power switch’s gate above the supply

voltage. It is connected between SW and BS pins to form a floating supply across the

power switch driver.

BST

VIN

10, 18,

Exposed Pad

Supply Voltage. The MP38875 operates from a +4.5V to +16V unregulated input. C1

is needed to prevent large voltage spikes from appearing at the input.

11-17

GATE

GND

Switch Output. These pins are fused together.

Gate Driver Output. Connect this pin to the synchronous MOSFET.

Ground.

MP38875 Rev. 0.9

11/20/2009

www.MonolithicPower.com

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

1 2 345 6 7...14

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