Datasheet > TPS51275B-1

TPS51275B-1

更新时间： 2024-10-02 01:09:47

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
31页	1177K
描述
TPS51275B-1 Dual Synchronous, Step-Down Controller With 5-V and 3.3-V LDOs

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TPS51275B-1

SLVSCT3 –MARCH 2015

TPS51275B-1 Dual Synchronous, Step-Down Controller With 5-V and 3.3-V LDOs

1 Features

2 Applications

•

Input Voltage Range: 5 V to 24 V

•

Notebook Computers

Tablet Computers

•

Output Voltages: 5 V and 3.3 V (Adjustable Range

±10%)

Desktop Computers

•

Built-in, 100-mA, 5-V, and 3.3-V LDOs

Clock Output for Charge-Pump

±1% Reference Accuracy

3 Description

The TPS51275B-1 device is a cost-effective, dual-

synchronous buck controller targeted for notebook

system-power supply solutions. The device has 5-V

and 3.3-V low-dropout regulators (LDOs) and

requires few external components. The 260-kHz

VCLK output can be used to drive an external charge

pump, generating gate drive voltage for the load

switches without reducing the main converter

efficiency. The TPS51275B-1 device supports high

efficiency, fast transient response and provides a

combined power-good signal. Adaptive on-time, D-

CAP control provides convenient and efficient

operation. The device operates with a supply input

voltage ranging from 5 to 24 V and supports output

voltages of 5 V and 3.3 V. The TPS51275B-1 device

is available in a 20-pin, 3-mm × 3-mm, WQFN

package and is specified from –40°C to 85°C.

Adaptive On-Time D-CAP™ Mode Control

Architecture with 300-kHz and 355-kHz Frequency

Setting

•

Out-of-Audio™ (OOA) Light-Load Operation

Internal 3.2-ms Voltage Servo Soft-Start

Low-Side R_DS(on)Current Sensing Scheme

Built-In Output Discharge Function

Separate Enable Input for Switchers

Dedicated OC Setting Terminals

Power Good Indicator

OVP, UVP, and OCP Protection

Non-Latch UVLO and OTP Protection

20-Pin, 3-mm × 3-mm, WQFN (RUK) Package

Device Information⁽¹⁾

PART NUMBER

SKIP MODE

ALWAYS ON-LDO

TPS51275B-1

OOA

VREG3 and VREG5

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

4 Typical Application Diagram

TPS51275B-1

VIN

VBST1

DRVH1

VBST2

DRVH2

OUT

5 V

3.3 V

SW1

SW2

DRVL1

VO1

DRVL2

VFB1

CS1

VFB2

CS2

VCLK

EN1

PGOOD

EN2

PGOOD

15 V

OUT

5-V EN

3.3-V EN

VREG5

VREG3

3.3-V Always ON

5 V

Always ON

1 µF

UDG-12091

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...31

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与TPS51275B-1相关器件

型号	品牌	获取价格	描述	数据表
TPS51275B-1_15	TI	获取价格	TPS51275B-1 Dual Synchronous, Step-Down Controller With 5-V and 3.3-V LDOs
TPS51275B-1RUKR	TI	获取价格	TPS51275B-1 Dual Synchronous, Step-Down Controller With 5-V and 3.3-V LDOs
TPS51275B-1RUKT	TI	获取价格	TPS51275B-1 Dual Synchronous, Step-Down Controller With 5-V and 3.3-V LDOs
TPS51275BRUKR	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51275BRUKT	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51275C	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51275CRUKR	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51275CRUKT	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51275RUKR	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51275RUKT	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs

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