The LTC®3895 is a high performance step-down switching regulator DC/DC controller that drives an all N-channel synchronous power MOSFET stage that can operate from input voltages up to 140V. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz.
The gate drive voltage can be programmed from 5V to 10V to allow the use of logic or standard-level FETs to maximize efficiency. An integrated switch in the top gate driver eliminates the need for an external bootstrap diode. An internal charge pump allows for 100% duty cycle operation.
The low 40μA no-load quiescent current extends operating run time 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 LTC3895 features a precision 0.8V reference and power good output indicator. The output voltage can be programmed between 0.8V to 60V using external resistors or pin-programmed for a fixed 5V or 3.3V.
Part Number | Package | Temp | Price(1-99) | Price (1k)* |
---|---|---|---|---|
LTC3895EFE#PBF | TSSOP-38 | E | $6.71 | $4.70 |
LTC3895EFE#TRPBF | TSSOP-38 | E | $6.77 | $4.76 |
LTC3895HFE#PBF | TSSOP-38 | H | $8.00 | $5.60 |
LTC3895HFE#TRPBF | TSSOP-38 | H | $8.06 | $5.66 |
LTC3895IFE#PBF | TSSOP-38 | I | $7.57 | $5.30 |
LTC3895IFE#TRPBF | TSSOP-38 | I | $7.63 | $5.36 |
Part Number | Description | Price |
---|---|---|
DC2117A | LTC3895EFE Demo Board | Sync Buck, 14V ≤ VIN ≤ 130V, 150V pk; VOUT = 12V @ 5A | $225.00 |