| Part No.： | LTC3858-2 |
| Page： | 40 Pages |
| Size： | 422 KB |
| Manufacturer： | Linear Technology |
| Logo： |  |
| Views： | 0 |
| Update Time： | 2024-12-17 13:40:54 |
| DataSheet： | Download |
| Part No. | Packing | SPQ | Marking | MSL | Pins | Temp Range | Package Description | Buy |
| LTC3858EUH-2#PBF | Tube | 73 | 38582 | 1 | 32 | -40°C ~ 125°C | 32-Lead (5mm × 5mm) Plastic QFN | |
| LTC3858EUH-2#TRPBF | Reel | 2500 | 38582 | 1 | 32 | -40°C ~ 125°C | 32-Lead (5mm × 5mm) Plastic QFN | |
| LTC3858IUH-2#PBF | Tube | 73 | 38582 | 1 | 32 | -40°C ~ 125°C | 32-Lead (5mm × 5mm) Plastic QFN | |
| LTC3858IUH-2#TRPBF | Reel | 2500 | 38582 | 1 | 32 | -40°C ~ 125°C | 32-Lead (5mm × 5mm) Plastic QFN |
The LTC3858-2 is a high performance dual step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. Power loss and noise due to the input capacitor ESR are minimized by operating the two controller outputs out of phase.
The 170μA no-load quiescent current extends operating life in battery-powered systems. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3858-2 differs from the LTC3858 by having the overvoltage protection crowbar and short-circuit latchoff disabled. A wide 4V to 38V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries.
Independent soft-start pins for each controller ramp the output voltages during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions.
