LTC3528BEDDB-2#TRMPBF

LTC3528BEDDB-2#TRMPBF is a synchronous, fixed-frequency step-up DC/DC converter with output disconnect. High-efficiency synchronous rectification, in addition to a 700mV start-up voltage and operation down to 500mV once started, provides longer run-time for single or multiple-cell battery-powered products. A switching frequency of 2MHz minimizes the solution footprint by allowing the use of tiny, low-profile inductors and ceramic capacitors. The current-mode PWM is internally compensated, simplifying the design process. The LTC3528B-2 features continuous switching at light loads. Anti-ringing circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current, open-drain power good output, short-circuit protection, and thermal overload protection. Applications include medical instruments, flash-based MP3 players, noise-cancelling headphones, wireless mice, Bluetooth headsets.

• Input voltage range from 0.50V to 5.5V, VOUT range from 1.6V to 5.25V
• Up to 94% efficiency, output disconnect, VIN > VOUT operation
• Integrated soft-start, current mode control with internal compensation
• Low noise PWM operation, internal synchronous rectifier, anti-ringing control
• Feedback input current is 1nA typical at (VFB = 1.3V, TA = 25°C)
• Shutdown quiescent current is 0.01µA typ at (VSHDN = 0V, not including switch leakage, VOUT = 0V)
• Active quiescent current is 300µA typical at (measured on VOUT, nonswitching)
• Frequency is 2MHz typical, maximum duty cycle is 92% typical at (VFB = 1.15V)
• Operating junction temperature range from -40°C to 125°C
• 8-lead plastic DFN package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party