Datasheet > RT6259B

RT6259B

更新时间： 2024-04-09 18:58:44

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
17页	267K
描述
3A, 18V, 650kHz, ACOT? Synchronous Step-Down Converter

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中文翻译

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数据手册

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RT6259B 数据手册

RT6259A/B

3A, 18V, 650kHz, ACOT^TMSynchronous Step-Down Converter

General Description

The RT6259A/B are high-performance 650kHz 3A step-

down regulators with internal power switches and

synchronous rectifiers. They feature quick transient

response using their Advanced Constant On-Time

(ACOT^TM) control architecture that provides stable

operation with small ceramic output capacitors and without

complicated external compensation, among other benefits.

The input voltage range is from 4.5V to 18V and the output

is adjustable from 0.765V to 7V.

to avoid low-frequency interference while the RT6259A

features a power-saving discontinuous operating mode at

light loads.

Features

 Fast Transient Response

 Steady 650kHz Switching Frequency At all Load

Current (RT6259B)

 Discontinuous Operating Mode at Light Load

(RT6259A)

The proprietaryACOT^TMcontrol improves upon other fast-

response constant on-time architectures, achieving nearly

constant switching frequency over line, load, and output

voltage ranges. Since there is no internal clock, response

to transients is nearly instantaneous and inductor current

can ramp quickly to maintain output regulation without

large bulk output capacitance. The RT6259A/B are stable

with and optimized for ceramic output capacitors.

 3A Output Current

 Advanced Constant On-Time (ACOT^TM) Control

 Optimized for Ceramic Output Capacitors

 4.5V to 18V Input Voltage Range

 Internal 70mΩ Switch and 70mΩ Synchronous

Rectifier

 0.765V to 7V Adjustable Output Voltage

 Externally-adjustable, Pre-biased Compatible Soft-

Start

With internal 70mΩ switches and 70mΩ synchronous

rectifiers, the RT6259A/B display excellent efficiency and

good behavior across a range of applications, especially

for low output voltages and low duty cycles. Cycle-by-

cycle current limit, input under-voltage lockout, externally-

adjustable soft-start, output under- and over-voltage

protection, and thermal shutdown provide safe and smooth

operation in all operating conditions.

 Cycle-by-Cycle Current Limit

 Optional Output Discharge Function

 Output Over- and Under-voltage Shut Down

 Latched (RT6259ALGQW/RT6259BLGQW Only)

 With Hiccup Mode (RT6259AHGQW/RT6259BHGQW

Only)

 Input Under-Voltage Lockout

 Thermal Shutdown

The RT6259A and RT6259B are each available in

the WQFN-16L 3x3 package, with exposed thermal pads.

The RT6259B switches continuously even at light loads

 RoHS Compliant and Halogen Free

Simplified Application Circuit

RT6259A/B

VIN

OUT

VCC

BOOT

Power Good

VREG5

PGOOD

Input Signal

VREG5

GND PGND

is a registered trademark of Richtek Technology Corporation.

DS6259A/B-01 September 2015

www.richtek.com

12 3 4 5 6 7...17

中文翻译

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与RT6259B相关器件

型号	品牌	获取价格	描述	数据表
RT6259BHGQW	RICHTEK	获取价格	IC REG BUCK ADJ 3A SYNC 16WQFN
RT6259BLGQW	RICHTEK	获取价格	IC REG BUCK ADJ 3A SYNC 16WQFN
RT6260C	RICHTEK	获取价格	暂无描述
RT6262A	RICHTEK	获取价格	17V Input, 2A, ACOT? Buck Converter with Both FETs OC Protection
RT6262B	RICHTEK	获取价格	17V Input, 2A, ACOT? Buck Converter with Both FETs OC Protection
RT6263A	RICHTEK	获取价格	暂无描述
RT6263B	RICHTEK	获取价格	暂无描述
RT6264A	RICHTEK	获取价格	暂无描述
RT6264B	RICHTEK	获取价格	暂无描述
RT6266	RICHTEK	获取价格	暂无描述

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