TPS54900

更新时间： 2024-11-17 22:49:39

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
16页	250K
描述
PROGRAMMABLE FOUR-CHANNEL STEP-DOWN DC/DC CONVERTER

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TPS54900 数据手册

TPS54900

(6,4 mm x 5,0 mm)

SLVS405 – OCTOBER 2001

PROGRAMMABLE FOUR-CHANNEL STEP-DOWN

DC/DC CONVERTER

FEATURES

DESCRIPTION

Four Independent 100-mA Channels

Programmable Over 4-Wire Serial Port

The TPS54900 four-channel step-down converter uses

voltage mode PWM control to provide four

independently programmable output voltages. Each

regulated channel includes a high-side PMOSFET

Converter Regulation Range:

7.5 V to 13.1 V in 400-mV Steps, Plus

Unregulated Pass-Through Mode to Shunt VIN

to any Output

switch with a typical r

of 0.8 Ω, which makes it

DS(ON)

suitable for high efficiency, low current applications.

Commands sent to the TPS54900 over the four-wire

serial port programs the outputs independently or

globally to supply voltages from 7.5 V to 13.1 V in 0.4-V

increments. When the input voltage is desired at an

output, a bypass mode can be activated which fully

enhances the PMOSFET switch and disables the

switching circuitry of the selected channel.

Internally Compensated PWM Controller and

Integrated PMOS Power Switches

Global and Per Channel Status Available

Through Serial Port

External Synchronization of PWM With

System Clock

Per Channel Current Limit and Global Thermal

Shutdown

The TPS54900 is an ideal companion device to power

THS7102 ADSL line drivers as a part of the AC5 central

office ADSL chipset. With the AC5 chipset controlling

the TPS54900 output voltages, significant power

savings are realized by reducing the excess supply

headroom on a per line basis.

–40°C to 85°C Ambient Temperature Range

APPLICATIONS

ADSL Central Office Line Drivers

Software Line Card Provisioning

EFFICIENCY

DRIVER SUPPLY VOLTAGE

TSSOP (PW) PACKAGE

(TOP VIEW)

100

LX0

LX1

GND

SFS

SDI

FB0

FB1

LX3

LX2

VIN

SDO

SCLK

CBS

FB3

FB2

Efficiency

Driver Current

Driver Supply Voltage – V

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.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

www.ti.com

12 3 4 5 6 7...16

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与TPS54900相关器件

型号	品牌	获取价格	描述	数据表
TPS54900PW	TI	获取价格	PROGRAMMABLE FOUR-CHANNEL STEP-DOWN DC/DC CONVERTER
TPS54900PWR	TI	获取价格	PROGRAMMABLE FOUR-CHANNEL STEP-DOWN DC/DC CONVERTER
TPS54900PWRG4	TI	获取价格	SPECIALTY ANALOG CIRCUIT, PDSO16, GREEN, PLASTIC, TSSOP-16
TPS54910	TI	获取价格	3-V TO 4-V INPUT, 9-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT)
TPS54910PWP	TI	获取价格	3-V TO 4-V INPUT, 9-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT)
TPS54910PWPG4	TI	获取价格	输入电压为 3V 至 4V 的 9A 同步降压转换器 \| PWP \| 28 \| -40 t
TPS54910PWPR	TI	获取价格	输入电压为 3V 至 4V 的 9A 同步降压转换器 \| PWP \| 28 \| -40 t
TPS54910PWPRG4	TI	获取价格	输入电压为 3V 至 4V 的 9A 同步降压转换器 \| PWP \| 28 \| -40 t
TPS54917	TI	获取价格	3-V TO 4-V INPUT, 9-A, SMALL SYNCHRONOUS-BUCK
TPS54917RUVR	TI	获取价格	3-V TO 4-V INPUT, 9-A, SMALL SYNCHRONOUS-BUCK

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