LTC3862-2 - Multi-Phase Current Mode Step-Up DC/DC Controller
The LTC®3862-2 is a two-phase constant frequency, current mode boost and SEPIC controller that drives N-channel power MOSFETs. Two-phase operation reduces system filtering capacitance and inductance requirements.
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. Multiphase 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.
Features
Typical Application  | Applications
Packaging   |
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LTC3862EFE-2#PBF | TSSOP-24 | E | $4.87 | $3.41 |
| LTC3862EFE-2#TRPBF | TSSOP-24 | E | $3.47 | |
| LTC3862EGN-2#PBF | SSOP-24 | E | $4.70 | $3.29 |
| LTC3862EGN-2#TRPBF | SSOP-24 | E | $3.35 | |
| LTC3862EUH-2#PBF | 5x5 QFN-24 | E | $4.70 | $3.29 |
| LTC3862EUH-2#TRPBF | 5x5 QFN-24 | E | $3.35 | |
| LTC3862HFE-2#PBF | TSSOP-24 | H | $5.89 | $4.12 |
| LTC3862HFE-2#TRPBF | TSSOP-24 | H | $4.18 | |
| LTC3862HGN-2#PBF | SSOP-24 | H | $5.71 | $4.00 |
| LTC3862HGN-2#TRPBF | SSOP-24 | H | $4.06 | |
| LTC3862HUH-2#PBF | 5x5 QFN-24 | H | $5.71 | $4.00 |
| LTC3862HUH-2#TRPBF | 5x5 QFN-24 | H | $4.06 | |
| LTC3862IFE-2#PBF | TSSOP-24 | I | $5.46 | $3.82 |
| LTC3862IFE-2#TRPBF | TSSOP-24 | I | $3.88 | |
| LTC3862IGN-2#PBF | SSOP-24 | I | $5.30 | $3.71 |
| LTC3862IGN-2#TRPBF | SSOP-24 | I | $3.77 | |
| LTC3862IUH-2#PBF | 5x5 QFN-24 | I | $5.30 | $3.71 |
| LTC3862IUH-2#TRPBF | 5x5 QFN-24 | I | $3.77 |
Demo Boards
| Part Number | Description | Price |
|---|---|---|
| DC1891A | LTC3862EFE-2 Demo Board | 2-Phase SEPIC, 6V ≤ VIN ≤ 60V; VOUT = 12V @ 6A | $125.00 |
| DC2006A-A | LTC3862EUH-2 Demo Board | Boost Controller, 6V ≤ VIN ≤ 36V; VOUT = 50V @ 10A | $125.00 |
| DC2006A-B | LTC3862EUH-2 Demo Board | Boost Controller, 6V ≤ VIN ≤ 36V; VOUT = 120V @ 2A | $125.00 |
- R526 - Reliability Data
- LTC3862-2 Footprints and Symbols
- LTC3862-2 Demo Circuit - Automotive High Output Voltage Boost Converter (5-28V to 75V @ 1A)
- LTC3862-2 Demo Circuit - High Power, High Voltage, 4-Phase Boost Converter (6-36V to 50V @ 10A)
- LTC3862-2 Demo Circuit - Low Noise PolyPhase SEPIC DC/DC Converter (6-28V to 12V @ 1A)
- LTC3862-2 Project - Multi-Phase Current Mode Step-Up DC/DC Controller (6-36V to 50V @ 10A)
