The LTC3896EFE#TRPBF is a high performance inverting DC/DC switching regulator controller that drives an all N-channel synchronous power MOSFET stage. It converts a wideranging positive input voltage source to a regulated negative output that can be as much as 60V below ground. The input can operate from a voltage as low as 4V and as high as 140V – |VOUT–|.
The LTC3896EFE#TRPBF contains true ground-referenced RUN, PLLIN and PGOOD pins, eliminating the need for external discrete level-shifting components to interface with the LTC3896.
A constant frequency current mode architecture allows a phase-lockable frequency of up to 850kHz. 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 LTC3896EFE#TRPBF features a precision 0.8V reference and power good output indicator. The soft-start (SS) pin ramps the output voltage during start-up.
Feature
- Wide VIN + |VOUT–| Range: 4V to 140V (150V Abs Max)
- Wide Output Voltage Range: –60V to –0.8V
- Ground-Referenced Control / Interface Pins
- Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
- Integrated Bootstrap Diode
- Low Operating IQ: 40μA (Shutdown = 10μA)
- Selectable Gate Drive UVLO Thresholds
- Onboard LDO or External NMOS LDO for DRVCC
- EXTVCC LDO Powers Drivers from Output
- Phase-Lockable Frequency (75kHz to 850kHz)
- Programmable Fixed Frequency (50kHz to 900kHz)
- Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Loads
- Adjustable Burst Clamp and Current Limit
- Power Good Output Voltage Monitor
- Programmable Input Overvoltage Lockout
- 38-Lead TSSOP High Voltage Package
Applications
- Automotive and Industrial Power Systems
- Telecommunications Power Supplies
- Distributed Power Systems
