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LTC3862

Features: · Wide VIN Range: 4V to 36V Operation· 2-Phase Operation Reduces Input and Output Capacitance· Fixed Frequency, Peak Current Mode Control· 5V Gate Drive for Logic-Level MOSFETs· Adjustable Slope Compensation Gain· Adjustable Max Duty Cycle (Up to 96%)· Adjustable Leading Edge Blanking· ±...

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SeekIC No. : 004402393 Detail

LTC3862: Features: · Wide VIN Range: 4V to 36V Operation· 2-Phase Operation Reduces Input and Output Capacitance· Fixed Frequency, Peak Current Mode Control· 5V Gate Drive for Logic-Level MOSFETs· Adjustable...

LTC3862 Data Sheet

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Part Number:
LTC3862
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· Wide VIN Range: 4V to 36V Operation
· 2-Phase Operation Reduces Input and Output Capacitance
· Fixed Frequency, Peak Current Mode Control
· 5V Gate Drive for Logic-Level 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 5V LDO Regulator
· 24-Lead Narrow SSOP Package
· 5mm × 5mm QFN with 0.65mm Lead Pitch and
    24-Lead Thermally Enhanced TSSOP Packages


Application

· Automotive, Telecom and Industrial Power Supplies


Pinout

Connection Diagram


Specifications

Input Supply Voltage (VIN) .................... 0.3V to 40V
INTVCC Voltage ....................................... 0.3V to 6V
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)
   LTC3862E .......................................... 40 to 85
   LTC3862I.......................................... 40 to 125
   LTC3862H ........................................ 40 to 150
Storage Temperature Range ............... 65 to 150
Refl ow Peak Body Temperature ......................... 260


Description

The LTC®3862 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 5V gate drive is optimized for most automotive and industrial grade power MOSFETs.

Adjustable slope compensation gain of LTC3862 allows the user to fi netune the current loop gain, improving noise immunity.

The operating frequency of LTC3862 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 of LTC3862 include an internal 5V 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




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