TPS51222

更新时间： 2024-11-23 12:16:15

品牌	Logo	应用领域
德州仪器 - TI		功率控制控制器
页数	文件大小	规格书
42页	1033K
描述
Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller

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TPS51222 数据手册

TPS51222

www.ti.com ............................................................................................................................................................................................... SLUS908–JANUARY 2009

Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller

FEATURES

•

Input Voltage Range: 4.5 V to 32 V

APPLICATIONS

•

Notebook Computer System and I/O Bus

Output Voltage Range: 1 V to 12 V

•

Point of Load in LCD TV, MFP

Selectable Light Load Operation

(Continuous / Auto Skip / Out-Of-Audio™ Skip)

DESCRIPTION

•

Programmable Droop Compensation

Voltage Servo Adjustable Soft Start

200-kHz to 1-MHz Fixed-Frequency PWM

Current Mode Architecture

The TPS51222 is a dual synchronous buck regulator

controller with two LDOs. It is optimized for 5-V/3.3-V

system controller, enabling designers to cost

effectively complete 2-cell to 4-cell notebook system

power supply. The TPS51222 supports high

efficiency, fast transient response, and 99% duty

cycle operation. It supports supply input voltage

ranging from 4.5 V to 32 V, and output voltages from

1 V to 12 V. Peak current mode supports stability

operation with lower ESR capacitor and output

accuracy. The high duty cycle (99%) operation and

the wide input/output voltage range supports flexible

design for small mobile PCs and a wide variety of

other applications. The fixed frequency can be

adjusted from 200 kHz to 1 MHz by a resistor, and

each channel runs 180° out-of-phase. The TPS51222

can also synchronize to the external clock, and the

interleaving ratio can be adjusted by its duty. The

TPS51222 is available in the 32-pin 5 × 5 QFN

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

180° Phase Shift Between Channels

Resistor or Inductor DCR Current Sensing

Current Monitor Output for Each Channel

Adaptive Zero Crossing Circuit

Powergood Output for Each Channel

OCL/OVP/UVP/UVLO Protections

Thermal Shutdown (Non-Latch)

Output Discharge Function

Integrated Boot Strap MOSFET Switch

QFN-32 (RTV) Package

VBAT

VREG5

5 V/

VBAT

100 mA

VO2

3.3 V

VO1

5 V

32 31 30 29 28 27 26 25

DRVH1

V5SW

DRVH2 24

VIN 23

VO1

VBAT

EN2

VREG3

3.3 V/

VREG3 22

EN2 21

10 mA

EN1

PGOOD1

SKIPSEL1

EN1

TPS51222RTV

PGOOD1

SKIPSEL1

CSP1

PGOOD2 20

SKIPSEL2 19

CSP2 18

PGOOD2

SKIPSEL2

CSN1

CSN2 17

10 11 12 13 14 15 16

IMON1

VO1

IMON2

VO2

UDG-09009

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Out-Of-Audio, PowerPAD are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...42

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TPS51222 替代型号

型号	品牌	替代类型	描述	数据表
TPS51221	TI	功能相似	Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller

与TPS51222相关器件

型号	品牌	获取价格	描述	数据表
TPS51222RTVR	TI	获取价格	Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
TPS51222RTVT	TI	获取价格	Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller
TPS51225	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225_15	TI	获取价格	Dual Synchronous, Step-Down Controller
TPS51225_17	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225B	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225BRUKR	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225BRUKT	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225C	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs
TPS51225CRUKR	TI	获取价格	Dual Synchronous, Step-Down Controller with 5-V and 3.3-V LDOs

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