LTC3561 1A, 4MHz, Synchronous Step-Down DC/DC Converter

The LTC3561 is a constant-frequency, synchronous, step-down DC/DC converter. Intended for medium power applications, it operates from a 2.63V to 5.5V input voltage range and has a user configurable operating frequency up to 4MHz, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. The output voltage is adjustable from 0.8V to 5V. Internal synchronous 0.11Ω power switches with 1.4A peak current ratings provide high efficiency. The LTC3561’s current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors.

To further maximize battery life, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle). The no-load quiescent current is only 240µA. In shutdown, the device draws <1µA

产品特点 Features

Uses Tiny Capacitors and Inductor
High Frequency Operation: Up to 4MHz
High Switch Current: 1.4A
Low RDS(ON) Internal Switches: 0.110Ω
High Efficiency: Up to 95%
VIN: 2.63V to 5.5V
Stable with Ceramic Capacitors
Current Mode Operation for Excellent Line and Load Transient Response
Short-Circuit Protected
Low Dropout Operation: 100% Duty Cycle
Low Shutdown Current: IQ ≤ 1µA
Low Quiescent Current: 240µA
Output Voltages from 0.8V to 5V
Low Noise Pulse-Skipping Operation
Small 8-Pin DFN Package

应用

Wireless LAN Power
Notebook Computers
Digital Cameras
Cellular Phones
Board Mounted Power Supplies

典型应用图

参数

LTC3561 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) *
LTC3561AEDD#PBF	DFN	8	E	$2.50	$1.75
LTC3561AEDD#TRPBF	DFN	8	E		$1.81
LTC3561AIDD#PBF	DFN	8	I	$2.87	$2.01
LTC3561AIDD#TRPBF	DFN	8	I		$2.06
LTC3561EDD	DFN	8	E	$3.57	$2.50
LTC3561EDD#PBF	DFN	8	E	$3.57	$2.50
LTC3561EDD#TR	DFN	8	E		$2.56
LTC3561EDD#TRPBF	DFN	8	E		$2.56

LTC3561 数据手册及相关资料下载

数据手册(英文) : LTC3561 - 1A, 4MHz, Synchronous Step-Down DC/DC Converter.PDF
产品选型卡 : Energy Harvesting Portfolio.PDF
可靠性数据 : R415 Reliability Data .PDF