LTC1625 Selling Leads, Price trend, LTC1625 DataSheet download, circuit diagram from SeekIC.com

Features: ·Highest Efficiency Current Mode Controller·No Sense Resistor Required·Stable High Current Operation·Dual N-Channel MOSFET Synchronous Drive·Wide VIn Range: 3.7V to 36V·Wide VOUT Range: 1.19V to VIN·±1% 1.19V Reference·Programmable Fixed Frequency with Injection Lock·Very Low Drop Out Op...

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SeekIC No. : 004401741 Detail

LTC1625: Features: ·Highest Efficiency Current Mode Controller·No Sense Resistor Required·Stable High Current Operation·Dual N-Channel MOSFET Synchronous Drive·Wide VIn Range: 3.7V to 36V·Wide VOUT Range: 1....

LTC1625 Data Sheet

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Part Number:: LTC1625
Supply Ability:: 5000

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Product Details

Description

Features:

·Highest Efficiency Current Mode Controller
·No Sense Resistor Required
·Stable High Current Operation
·Dual N-Channel MOSFET Synchronous Drive
·Wide V_In Range: 3.7V to 36V
·Wide V_OUT Range: 1.19V to VIN
·±1% 1.19V Reference
·Programmable Fixed Frequency with Injection Lock
·Very Low Drop Out Operation: 99% Duty Cycle
·Forced Continuous Mode Control Pin
·Optional Programmable Soft Start
·Pin Selectable Output Voltage
·Foldback Current Limit
·Output Overvoltage Protection
·Logic Controlled Micropower Shutdown: IQ < 30mA
·Available in 16-Lead Narrow SSOP and SO Packages

Application

· Notebook and Palmtop Computers, PDAs
·Cellular Telephones and Wireless Modems
·Battery Chargers
·Distributed Power

Pinout

Connection Diagram

Specifications

(Note 1)
Input Supply Voltage (V_IN, TK) ................ 36V to 0.3V
Boosted Supply Voltage (BOOST) ............ 42V to 0.3V
Boosted Driver Voltage (BOOST SW) ..... 7V to 0.3V
Switch Voltage (SW).....................................36V to 5V
EXTV_CC Voltage ..........................................7V to 0.3V
I_THVoltage ..............................................2.7V to 0.3V
FCB, RUN/SS, SYNC Voltages .......................7V to 0.3V
V_OSENSE, V_PROG V_oltages .........(INTV_CC + 0.3V) to 0.3V
Peak Driver Output Current < 10s (TG, BG) ............. 2A
INTV_CC Output Current ........................................ 50mA
Operating Ambient Temperature Range
LTC1625C................................................. 0°C to 70°C
LTC1625I (Note 5)................................ 40°C to 85°C
Junction Temperature (Note 2) ........................... 125°C
Storage Temperature Range ............. 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C

Description

The LTC^®1625 is a synchronous step-down switching regulator controller that drives external N-Channel power MOSFETs using few external components. Current mode control with MOSFET V_DS sensing eliminates the need for a ense resistor and improves efficiency. The frequency of a nominal 150kHz internal oscillator can be synchronized to an external clock over a 1.5:1 frequency range.

Burst Mode^TMoperation at low load currents reduces switching losses and low dropout operation extends operating time in battery-powered systems. A forced continuous mode control pin can assist secondary winding regulation by disabling Burst Mode operation when the main output is lightly loaded.

Fault protection is provided by foldback current limiting and an output overvoltage comparator. An external capacitor attached to the RUN/SS pin provides soft start capability for supply sequencing. A wide supply range allows operation from 3.7V (3.9V for LTC1625I) to 36V at the input and 1.19V to V_IN at the output.

LTC1625

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