Datasheet > RT6545BGQW

RT6545BGQW

更新时间： 2024-01-16 19:24:24

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
21页	260K
描述
Dual-Channel Synchronous DC/DC Step-Down Controller with 5V/3.3V LDOs

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数据手册

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RT6545BGQW 数据手册

RT6545A/B

Pin No.

Pin Name

Pin Function

Switch Node of Channel 2 MOSFETs. PHASE2 is the internal lower supply rail for

the UGATE2 high-side gate driver. PHASE2 is also the current-sense input for the

Channel 2.

PHASE2

Bootstrap Supply for Channel 2 High-Side Gate Driver. Connect to an external

capacitor according to the typical application circuits.

BOOT2

High-Side Gate Driver Output for Channel 2. UGATE2 swings between PHASE2

and BOOT2.

UGATE2

Low-Side Gate Driver Output for Channel 2. LGATE2 swings between GND and

LDO5.

LGATE2

VIN

Power Input for 5V and 3.3V LDO Regulators and Buck Controllers.

5V Linear Regulator Output. LDO5 is also the supply voltage for the low-side

MOSFET and analog supply voltage for the device.

LDO5

BYP1

Switch-over Source Voltage Input for LDO5.

Low-Side Gate Driver Output for Channel 1. LGATE1 swings between GND and

LDO5.

LGATE1

High-Side Gate Driver Output for Channel 1. UGATE1 swings between PHASE1

and BOOT1.

UGATE1

BOOT1

Bootstrap Supply for Channel 1 High-Side Gate Driver. Connect to an external

capacitor according to the typical application circuits.

Switch Node of Channel 1 MOSFETs. PHASE1 is the internal lower supply rail for

the UGATE1 high-side gate driver. PHASE1 is also the current sense input for the

Channel 1.

PHASE1

VCLK

EN1

Oscillator Output for Charge Pump.

Enable Control Input for Channel 1.

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

GND for maximum power dissipation.

GND

(Exposed Pad)

Functional Block Diagram

BOOT1

BOOT2

UGATE1

UGATE2

PHASE2

PHASE1

LDO5

Channel 1

Buck

Channel 2

Buck

Controller

LGATE1

FB1

LGATE2

FB2

CS2

CS1

BYP1

PGOOD

VCLK

BYP1

OSC

GND

SW5 Threshold

Power On

Sequence

Clear Fault Latch

EN1

EN2

REF

LDO3

BYP1

LDO3

LDO5

VIN

LDO5

is a registered trademark of Richtek Technology Corporation.

DS6545A/B-00 May 2016

www.richtek.com

1 234 5 6 7...21

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