SP6121

更新时间： 2024-01-19 06:13:37

品牌	Logo	应用领域
西伯斯 - SIPEX		转换器射频微波控制器
页数	文件大小	规格书
16页	358K
描述
Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters

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中文翻译

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数据手册

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SP6121 数据手册

SP6121

Low Voltage, Synchronous Step Down PWM Controller

Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters

FEATURES

■ Optimized for Single Input Voltage - 3V to 5.5V

V_CC

PDRV

NDRV

I_SET

■ High Efficiency: Greater than 95% possible

■ Accurate, 500kHz Fixed Frequency Operation

■ Fast Transient Response

SP6121

GND

V_FB

8 Pin SOIC

COMP

I_SENSE

■ 500µA, I_Q(25µA in Shutdown)

■ Internal, 0.4 V/ms, Soft Start Circuit

■ Precision 1% Reference

Now Available in Lead Free Packaging

■ Resistor Programmable Output Voltage

■ Lossless Adjustable Current Limit with

■ High Side R_DS(ON)Sensing

■ 0% to 100% Duty Cycle Range

■ High Side PMOS Switch Negates Need for

APPLICATIONS

■ Supply Bias for

- DSP

- Microprocessor Core

- I/O & Logic

■ External Charge Pump

■ Output Over Voltage Protection

■ Hiccup Mode Current Limit Protection

■ Video Cards

■ Board Level Supply in

Distributed Power Systems

DESCRIPTION

The SP6121 is a fixed frequency, voltage mode, synchronous PWM controller designed to work

fromasingle5Vor3.3Vinputsupply,providingexcellentACandDCregulationforhighefficiency

power conversion. The operating frequency is internally set at 500kHz, permitting the use of

small, surface mount inductors and capacitors. Requiring only few external components, the

SP6121 packaged in an 8-pin SOIC, is especially suited for low voltage applications where cost,

small size and high efficiency are critical. With its low voltage capability and inherent 100% duty

cycle operation, the SP6121 allows low dropout operation in the event of a low input supply

voltage condition.

TYPICAL APPLICATION CIRCUIT

3.3V

RSET

2.3k

47µF

Ceramic 6.3V

®®

1.9V 8A

1.8µH

PDRV

NDRV

OUT

3.3µF

SP6121

GND

OUT

470µF x 2

5.2k

SET

COMP

SENSE

10k

3.7nF

50pF

Q1 = FAIRCHILD FDS6375

Q2 = FAIRCHILD FDS6690A

DS = STMICROELECTRONICS STPS2L25BU

L1 = PANASONIC ETQ-P6F1R6SFA

C_OUT= SANYO 4TPB470M

Date: 5/25/04

SP6121 Low Voltage, Synchronous Step Down PWM Controller

12 3 4 5 6 7...16

中文翻译

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与SP6121相关器件

型号	品牌	获取价格	描述	数据表
SP6121A	MICROSEMI	获取价格	Trans Voltage Suppressor Diode, 500W, 32.7V V(RWM), Bidirectional, 1 Element, Silicon, HER
SP6121AE3	MICROSEMI	获取价格	Trans Voltage Suppressor Diode, 500W, 32.7V V(RWM), Bidirectional, 1 Element, Silicon, HER
SP6121CN	SIPEX	获取价格	Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC
SP6121CN/TR	SIPEX	获取价格	Low Voltage, Synchronous Step Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC
SP6121CN-L	SIPEX	获取价格	暂无描述
SP6121CN-L/TR	SIPEX	获取价格	Switching Controller, Voltage-mode, 2A, 560kHz Switching Freq-Max, PDSO8, LEAD FREE, MS-01
SP6121E3	MICROSEMI	获取价格	Trans Voltage Suppressor Diode, 500W, 32.7V V(RWM), Bidirectional, 1 Element, Silicon, HER
SP6121EB	SIPEX	获取价格	Demo Board Manual
SP6122	SIPEX	获取价格	Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Pow
SP6122	MICROSEMI	获取价格	Trans Voltage Suppressor Diode, 500W, 35.8V V(RWM), Bidirectional, 1 Element, Silicon, HER

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