UCC3585J

更新时间： 2024-11-29 13:15:07

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
10页	142K
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中文翻译

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数据手册

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UCC3585J 数据手册

UCC2585

UCC3585

PRELIMINARY

Low Voltage Synchronous Buck Controller

FEATURES

DESCRIPTION

• Resistor Programmable 1.25V to 4.5V The UCC2585/UCC3585 synchronous Buck controller provides flexible

V_OUT

high efficiency power conversion for output voltages as low as 1.25V with

guaranteed ±1% DC accuracy. Output currents are only limited by the

choice of external logic level MOSFETs. With an input voltage range of

2.5V to 6.0V it is the ideal choice for 3.3V only, battery input, or other low

voltage systems. Applications include local microprocessor core voltage

power supplies for desktop and Notebook computers, and high speed GTL

bus regulation. Its fixed frequency oscillator is capable of providing practical

PWM operation to 700kHz.

• 2.5V to 6V Input Supply Range

• 1% DC Accuracy

• High Efficiency Synchronous

Switching

• Drives P-channel (High Side) and

N-channel (Low Side) MOSFETs

With its low voltage capability and inherent “always on” operation, the

UCC2585/UCC3585 causes VOUT to track VIN once VIN has exceeded

the threshold voltage of the external P channel MOSFET. Tracking can be

tailored for any application with a single resistor or disabled by connecting

TRACK to VIN. For dual supply rail microprocessors this feature negates

the need for external diodes to insure supply voltage tracking between the

+3.3V and lower voltage microprocessor core supplies.

• Lossless Programmable Current Limit

• Logic Compatible Shutdown

• Programmable Frequency

• Start-up Voltage Tracking Protects

Dual Rail Microprocessors

(continued)

TYPICAL APPLICATION DIAGRAM

VIN

0.47µF

27.4k

10k

15 VIN

CLSET

IRF7404

150µF 150µF

ENB

PDRV 12

147pF

549k

L1 4.7µF

COMP

VFB

ISENSE 11

NDRV 14

VOUT

IRF7401

C11

C10

220µF

10 SD

TRACK

N/C

3.2N

R10

36k

R12

32k

0.22µF

16 CT

PWRGND 13

470pF

ISET

GND

R11

82k

100k

RTN

UDG-98024

07/99

12 3 4 5 6 7...10

中文翻译

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UCC3585N	TI	获取价格	Low Voltage Synchronous Buck Controller 16-PDIP 0 to 85
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UCC3588-1N	TI	获取价格	1A SWITCHING CONTROLLER, 700kHz SWITCHING FREQ-MAX, PDIP16, PLASTIC, DIP-16
UCC3588-1PW	TI	获取价格	1A SWITCHING CONTROLLER, 700kHz SWITCHING FREQ-MAX, PDSO16, TSSOP-16
UCC3588D	TI	获取价格	5-BIT PROGRAMMABLE OUTPUT BICMOS POWER SUPPLY CONTROLLER