Power by Linear™ / Analog Devices' LTC7801EFE#PBF is a high-performance step-down (buck) switching regulator DC/DC controller. This controller drives an all N-channel synchronous power MOSFET stage that can operate from input voltages up to 140 V. A constant frequency current mode architecture allows a phase-lockable frequency of up to 850 kHz.The gate drive voltage can be programmed from 5 V to 10 V 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 40 μA 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 LTC7801EFE#PBF features a precision 0.8 V reference and power good output indicator. The output voltage can be programmed between 0.8 V to 60 V using external resistors.This controller comes in DFN or TSSOP packages that have operating temperature range of -40°C to +125°C or +150°C. The LTC7801EFE#PBF was designed for automotive, industrial, and telecommunication power systems.<strong>Features:</strong> Output voltage range: 0.8 V to 60 V, VIN range: 4 V to 140 V (150 V, abs max), Adjustable gate drive level: 5 V to 10 V (OPTI-DRIVE), Low operating IQ: 40 μA (shutdown = 10 μA), 100% duty cycle operation, No external bootstrap diode required, Selectable gate drive UVLO thresholds, Onboard LDO or external NMOS LDO for DRVCC, EXTVCC LDO powers drivers from VOUT, Phase-lockable frequency (75 kHz to 850 kHz), Programmable fixed frequency (50 kHz to 900 kHz), Selectable continuous, pulse-skipping, or low ripple Burst Mode® operation at light loads, Adjustable burst clamp, Power good output voltage monitor, Programmable input overvoltage lockout, Automotive, industrial, and telecommunication power systems, High voltage battery operated systems
Feature
- Wide VIN Range: 4V to 140V (150V Abs Max)
- Wide Output Voltage Range: 0.8V to 60V
- Adjustable Gate Drive Level: 5V to 10V (OPTI-DRIVE)
- Low Operating IQ: 40μA (Shutdown = 10μA)
- 100% Duty Cycle Operation
- No External Bootstrap Diode Required
- Selectable Gate Drive UVLO Thresholds
- Onboard LDO or External NMOS LDO for DRVCC
- EXTVCC LDO Powers Drivers from VOUT
- 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
- Power Good Output Voltage Monitor
- Programmable Input Overvoltage Lockout
- Small 24-Lead 4mm × 5mm QFN or TSSOP Packages
Applications
- Automotive and Industrial Power Systems
- High Voltage Battery Operated Systems
- Telecommunications Power Systems
