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LTC3862-1

Features: Wide VIN Range: 8.5V to 36V Operation 2-Phase Operation Reduces Input and OutputCapacitanceFixed Frequency, Peak Current Mode Control 10V Gate Drive for High Voltage MOSFETs Adjustable Slope Compensation Gain Adjustable Max Duty Cycle (Up to 96%) Adjustable Leading Edge Blanking ±1% Int...

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LTC3862-1: Features: Wide VIN Range: 8.5V to 36V Operation 2-Phase Operation Reduces Input and OutputCapacitanceFixed Frequency, Peak Current Mode Control 10V Gate Drive for High Voltage MOSFETs Adjustable Sl...

LTC3862-1 Data Sheet

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Part Number:
LTC3862-1
Supply Ability:
5000

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Upload time: 2024/11/21

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Product Details

Description



Features:

Wide VIN Range: 8.5V to 36V Operation
2-Phase Operation Reduces Input and Output
Capacitance
Fixed Frequency, Peak Current Mode Control
10V Gate Drive for High Voltage MOSFETs
Adjustable Slope Compensation Gain
Adjustable Max Duty Cycle (Up to 96%)
Adjustable Leading Edge Blanking
±1% Internal Voltage Reference
Programmable Operating Frequency with One
External Resistor (75kHz to 500kHz)
Phase-Lockable Fixed Frequency 50kHz to 650kHz
SYNC Input and CLKOUT for 2-, 3-, 4-, 6- or
12-Phase Operation (PHASEMODE Programmable)
Internal 10V LDO Regulator
24-Lead Narrow SSOP Package
5mm * 5mm QFN Package with 0.65mm Lead Pitch
24-Lead Thermally Enhanced TSSOP Package


Application

Automotive, Telecom and Industrial Power Supplies


Pinout

Connection Diagram


Specifications

Input Supply Voltage (VIN) ......................... 0.3V to 40V
INTVCC Voltage .......................................... 0.3V to 11V
INTVCC LDO RMS Output Current .........................50mA
RUN Voltage ................................................ 0.3V to 8V
SYNC Voltage ............................................... 0.3V to 6V
SLOPE, PHASEMODE, DMAX,
BLANK Voltage ........................................... 0.3V to 3V8
SENSE1+, SENSE1, SENSE2+,
SENSE2 Voltage ....................................... 0.3V to 3V8
SS, PLLFLTR Voltage ................................. 0.3V to 3V8
ITH Voltage ............................................... 0.3V to 2.7V
FB Voltage .................................................. 0.3V to 3V8
FREQ Voltage ............................................ 0.3V to 1.5V
Operating Junction Temperature Range (Notes 3, 4)
LTC3862-1E ......................................... 40 to 85
LTC3862-1I ........................................ 40 to 125
LTC3862-1H ....................................... 40 to 150
Storage Temperature Range ................... 65to 150
Refl ow Peak Body Temperature ........................... 260


Description

The LTC®3862-1 is a two phase constant frequency, current mode boost and SEPIC controller that drives N-channel power MOSFETs. Two phase operation reduces system fi ltering capacitance and inductance requirements. The 10V gate drive is optimized for most automotive and industrial grade power MOSFETs.

Adjustable slope compensation gain of LTC3862-1 allows the user to fi netune the current loop gain, improving noise immunity.
The operating frequency can be set with an external resistor over a 75kHz to 500kHz range and can be synchronized to an external clock using the internal PLL. Multi-phase operation is possible using the SYNC input, the CLKOUT output and the PHASEMODE control pin allowing 2-, 3-, 4-, 6- or 12-phase operation.

Other features include an internal 10V LDO with undervoltage lockout protection for the gate drivers, a precision RUN pin threshold with programmable hysteresis, soft-start and programmable leading edge blanking and maximum duty cycle. The LTC3862 is a 5V gate drive version of the LTC3862-1.




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