Linear Technology LTC3528B
1MHz Synchronous Step-Up DC/DC Converters
FEATURES
● Delivers 3.3V at 200mA from a Single Alkaline/ NiMH Cell or 3.3V at 400mA from Two Cells● VIN Start-Up Voltage: 700mV
● 1.6V to 5.25V VOUT Range
● Up to 94% Efficiency
● Output Disconnect
● 1MHz Fixed Frequency Operation
● VIN > VOUT Operation
● Integrated Soft-Start
● Current Mode Control with Internal Compensation
● Burst Mode® Operation with 12µA Quiescent Current (LTC3528)
● Low Noise PWM Operation (LTC3528B)
● Internal Synchronous Rectifier
● Logic Controlled Shutdown: <1µA
● Anti-Ringing Control
● Low Profile (3mm × 2mm × 0.75mm) DFN Package
APPLICATIONS
● Medical Instruments● Flash-Based MP3 Players
● Noise Canceling Headphones
● Wireless Mice
● Bluetooth Headsets
DESCRIPTION
The LTC®3528/LTC3528B are synchronous, fixed frequency step-up DC/DC converters 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.