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LTC3702, LTC3703, LTC37035EGN-5

Table of contents:
Info of LTC3702
Info of LTC3703
Info of LTC37035EGN-5

LTC3702, LTC3703, LTC37035EGN-5 Selling Leads, Datasheet

MFG:og stock Package Cooled:DIP D/C:regular supply

LTC3702, LTC3703, LTC37035EGN-5 Datasheet download

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Part Number: LTC3702

MFG: og stock

Package Cooled: DIP

D/C: regular supply

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LTC3703 General Description

The LTC^®3703 is a synchronous step-down switching regulator controller that can directly step-down voltages from up to 100V, making it ideal for telecom and automotive applications. The LTC3703 drives external N-channel MOSFETs using a constant frequency (up to 600kHz), voltage mode architecture. The external component count has been minimized, providing a compact overall solution footprint.

A precise internal reference provides 1% DC accuracy. A high bandwidth error amplifier and patented line feed forward compensation provide very fast line and load transient response. Strong 1 gate drivers allow the LTC3703 to drive multiple MOSFETs for higher current applications. The operating frequency is user programmable from 100kHz to 600kHz and can also be synchronized to an external clock for noise-sensitive applications. Current limit is programmable with an external resistor and utilizes the voltage drop across the synchronous MOSFET to eliminate the need for a current sense resistor. Soft- start is provided by an external capacitor. Pulling the soft-start pin low shuts down the LTC3703, reducing supply current to 50A.

LTC3703 Maximum Ratings

Supply Voltages
    V_CC, DRV_CC .......................................... 0.3V to 15V
    (DRV_CC BGRTN), (BOOST SW) ...... 0.3V to 15V
    BOOST.................................................. 0.3V to 115V
    BGRTN ........................................................ 5V to 0V
V_IN Voltage ............................................. 0.3V to 100V
SW Voltage ................................................ 1V to 100V
Run/SS Voltage ........................................... 0.3V to 5V
MODE/SYNC, INV Voltages......................... 0.3V to 15V
f_SET, FB, I_MAX Voltages ................................ 0.3V to 3V
Peak Output Current <10ms BG,TG ............................ 5A
Operating Temperature Range (Note 2) .... 40to 85
Junction Temperature (Notes 3, 7) ......................... 125
Storage Temperature Range ................... 65 to 150
Lead Temperature (Soldering, 10 sec.)................... 300

LTC3703 Features

` High Voltage Operation: Up to 100V
` Large 1 Gate Drivers
`No Current Sense Resistor Required
` Step-Up or Step-Down DC/DC Converter
` Dual N-Channel MOSFET Synchronous Drive
` Excellent Transient Response and DC Line Regulation
` Programmable Constant Frequency: 100kHz to 600kHz
` ±1% Reference Accuracy
` Synchronizable up to 600kHz
` Selectable Pulse Skip Mode Operation
` Low Shutdown Current: 50A Typ
` Programmable Current Limit
` Undervoltage Lockout
` Programmable Soft-Start
` 16-Pin Narrow SSOP and 28-Pin SSOP Packages

LTC3703 Typical Application

· 48V Telecom and Base Station Power Supplies
· Networking Equipment, Servers
· Automotive and Industrial Control

LTC3703 Connection Diagram

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