LTC3805-5 Selling Leads, Price trend, LTC3805-5 DataSheet download, circuit diagram from SeekIC.com

Features: `VIN and VOUT Limited Only by External Components`4.5V Undervoltage Lockout Threshold`Adjustable Slope Compensation`Adjustable Overcurrent Protection with Automatic Restart`Adjustable Operating Frequency (70kHz to 700kHz) with One External Resistor`Synchronizable to an External Clock`±1....

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SeekIC No. : 004402357 Detail

LTC3805-5: Features: `VIN and VOUT Limited Only by External Components`4.5V Undervoltage Lockout Threshold`Adjustable Slope Compensation`Adjustable Overcurrent Protection with Automatic Restart`Adjustable Oper...

LTC3805-5 Data Sheet

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Part Number:: LTC3805-5
Supply Ability:: 5000

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Product Details

Description

Features:

`VIN and VOUT Limited Only by External Components
`4.5V Undervoltage Lockout Threshold
`Adjustable Slope Compensation
`Adjustable Overcurrent Protection with Automatic Restart
`Adjustable Operating Frequency (70kHz to 700kHz) with One External Resistor
`Synchronizable to an External Clock
`±1.5% Reference Accuracy
`Only 100mV Current Sense Voltage Drop
`RUN Pin with Precision Threshold and Adjustable Hysteresis
`Programmable Soft-Start with One External Capacitor
`Low Quiescent Current: 360A
`Small 10-Lead MSOP and 3mm * 3mm DFN

Application

·Automotive Power Supplies
·Telecom Power Supplies
·Isolated Electronic Equipment
·Auxiliary/Housekeeping Power Supplies
·Power over Ethernet

Pinout

Connection Diagram

Specifications

V_CC to GND
Low Impedance Source .............................................................. 0.3V to 8.8V
Current Fed ...............................................................................25mA into V_CC*
SYNC ............................................................................................... 0.3V to 6V
SSFLT .............................................................................................. 0.3V to 5V
FB, I_TH, FS .................................................................................... 0.3V to 3.5V
RUN ............................................................................................... 0.3V to 18V
OC, I_SENSE ........................................................................................ 0.3V to 1V
Operating Temperature Range E-Grade .........................................40 to 85
I-Grade ........................................................................................ 40 to 125
Junction Temperature ................................................................................. 125
Storage Temperature Range ........................................................65 to 125
Lead Temperature (Soldering, 10 sec) LTC3805EMSE-5 Only ..................... 300
*LTC3805-5 internal clamp circuit regulates V_CC voltage to 9.5V

Description

The LTC®3805-5 is a current mode DC/DC controller designed to drive an N-channel MOSFET in fl yback, boost and SEPIC converter applications. Operating frequency and slope compensation can be programmed by external resistors. Programmable overcurrent sensing protects the converter from overload and short-circuit conditions. Soft-start can be programmed using an external capacitor and the soft-start capacitor also programs an automatic restart feature.

The LTC3805-5 provides ±1.5% output voltage accuracy and consumes only 360A of quiescent current during normal operation and only 40A during micropower startup. Using a 9.5V internal shunt regulator, the LTC3805-5 can be powered from a high VIN through a resistor or it can be powered directly from a low impedance DC voltage from 4.7V to 8.8V.

The LTC3805-5 is available in the 10-lead MSOP package and the 3mm * 3mm DFN package.

LTC3805-5

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