LTC3401 1A, 3MHz Micropower Synchronous Boost Converter

The LTC®3401 is a high efficiency, fixed frequency, step-up DC/DC converter that operates from an input voltage below 1V. The device includes a 0.16 Ohms N-channel MOSFET switch and a 0.18 Ohms P-channel synchronous rectifier. Switching frequencies up to 3MHz are programmed with an external timing resistor and the oscillator can be synchronized to an external clock. An external Schottky diode is optional but will slightly improve efficiency.

Quiescent current is only 38µA in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and can be enabled by driving the MODE/SYNC pin high. If the MODE/SYNC pin has either a clock or is driven low, then fixed frequency switching is enabled.

Other features include 1µA shutdown, antiringing control, open-drain power good output, thermal shutdown and current limit. The LTC3401 is available in the 10-lead thermally enhanced MSOP package. Higher current applications should use the 2A rated LTC3402 synchronous boost converter. Applications that require VOUT < 2.6V should use the LTC3423

产品特点 Features

Synchronous Rectification: Up to 97% Efficiency
1A Switch Current Rating
Fixed Frequency Operation Up to 3MHz
Wide Input Range: 0.5V to 5V (Operating)
Very Low Quiescent Current: 38µA (Burst Mode™ Operation)
2.6V to 5V Adjustable Output Voltage
0.85V (Typ) Start-Up Voltage
No External Schottky Diode Required (VOUT < 4.3V)
Synchronizable Switching Frequency
Burst Mode Enable Control
Antiringing Control Reduces Switching Noise
PGOOD Output
OPTI-LOOP® Compensation
Very Low Shutdown Current: <1µA
Small 10-Pin MSOP Package

参数

应用

Pagers
Handheld Instruments
Cordless Phones
Wireless Handsets
GPS Receivers
Battery Backup
CCFL Backlights

典型应用图

LTC3401 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) *
LTC3401EMS	MSOP	10	E	$3.10	$2.60
LTC3401EMS#PBF	MSOP	10	E	$3.10	$2.60
LTC3401EMS#TR	MSOP	10	E		$2.66
LTC3401EMS#TRPBF	MSOP	10	E		$2.66

LTC3401 数据手册及相关资料下载

数据手册(英文) : LTC3401 - 1A, 3MHz Micropower Synchronous Boost Converter.PDF
应用指南 (英文) : AN118 - High Voltage, Low Noise, DC/DC Converters.PDF
设计要点 (英文) : DN246 - 3MHz Micropower Synchronous Boost Converters Deliver 3W from Two Cells in a Tiny MSOP Package.PDF
设计要点 (中文) : DN246 3MHz Micropower Synchronous Boost Converters Deliver 3W from Two Cells in a Tiny MSOP Package.PDF
可靠性数据 : R415 Reliability Data .PDF