LTC3713 Low Input Voltage, High Power, No RSENSETM Synchronous Buck DC/DC Controller

The LTC®3713 is a high current, high efficiency synchronous buck switching regulator controller optimized for use with very low input supply voltages. It operates from inputs as low as 1.5V and provides a regulated output voltage from 0.8V up to (0.9)VIN. The controller uses a valley current control architecture to enable high operating frequencies without requiring a sense resistor.Operating frequency is selected by an external resistor and is compensated for variations in VIN and VOUT. The LTC3713 uses a pair of standard 5V logic-level N-channel external MOSFETs, eliminating the need for expensive P-channelor low threshold devices.

Discontinuous mode operation provides high efficiency operation at light loads. A forced continuous control pin reduces noise and RF interference, and can assist secondary winding regulation by disabling discontinuous operation when the main output is lightly loaded. Fault protection is provided by internal foldback current limiting,an output overvoltage comparator and an optional short-circuit shutdown timer

产品特点 Features

Very Low VIN(min): 1.5V
True Current Mode Control
5V Drive for N-Channel MOSFETs Eliminates Auxillary 5V Supply
No Sense Resistor Required
Uses Standard 5V Logic-Level N-Channel MOSFETs
Adjustable Current Limit
Adjustable Frequency
Switch tON(MIN) < 100ns
2% to 90% Duty Cycle at 200kHz
0.8V ±1% Reference
Power Good Output Voltage Monitor
Programmable Soft-Start
Output Overvoltage Protection
Optional Short-Circuit Shutdown Timer
Small 24-Lead SSOP Package

应用

Telecom Card 3.3V, 2.5V, 1.8V Step-Down
Bus Termination (DDR memory, SSTL)
Synchronous Buck with General Purpose Boost
Low VIN Synchronous Boost

典型应用图

参数

LTC3713 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) *
LTC3713EGN	SSOP	24	E	$4.14	$3.50
LTC3713EGN#PBF	SSOP	24	E	$4.14	$3.50
LTC3713EGN#TR	SSOP	24	E		$3.60
LTC3713EGN#TRPBF	SSOP	24	E		$3.60

LTC3713 数据手册及相关资料下载

数据手册(英文) : LTC3713 - Low Input Voltage, High Power, No RSENSE Synchronous Buck DC/DC Controller.PDF
可靠性数据 : R384 Reliability Data .PDF