LT3503 1A, 2.2MHz Step-Down Switching Regulator in 2mm x 3mm DFN

The LT3503 is a current mode PWM step-down DC/DC converter with an internal 1.45A power switch. The wide operating input range of 3.6V to 20V makes the LT3503 ideal for regulating power from a wide variety of sources. Its high operating frequency allows the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple.

Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The low current (<2µA) shutdown mode provides output disconnect, enabling easy power management in battery-powered systems

产品特点 Features

Wide Input Range: 3.6V to 20V
5V at 1.2A from 11V to 18V Input
5V at 1A from 7.2V to 18V Input
3.3V at 1.2A from 8.5V to 12V Input
3.3V at 1A from 5.5V to 12V Input
Fixed Frequency Operation: 2.2MHz
Output Adjustable Down to 780mV
Short-Circuit Robust
Uses Tiny Capacitors and Inductors
Soft-Start
Internally Compensated
Low Shutdown Current: <2µA
Low VCESAT Switch: 400mV at 1A
Thermally Enhanced, 2mm x 3mm 6-Pin DFN Low Profile Package

应用

Automotive Battery Regulation
Industrial Control Supplies
Wall Transformer Regulation
Distributed Supply Regulation
Battery-Powered Equipment

典型应用图

参数

LT3503 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LT3503EDCB	DFN	6	E	$3.21
LT3503EDCB#PBF	DFN	6	E	$3.21
LT3503EDCB#TR	DFN	6	E	$3.21	$2.25
LT3503EDCB#TRM	DFN	6	E	$3.26	$2.30
LT3503EDCB#TRMPBF	DFN	6	E	$3.26	$2.30
LT3503EDCB#TRPBF	DFN	6	E	$3.21	$2.25

LT3503 数据手册及相关资料下载

数据手册(英文) : LT3503 - 1A, 2.2MHz Step-Down Switching Regulator in 2mm x 3mm DFN.PDF
可靠性数据 : R530 Reliability Data .PDF