Datasheet Linear Technology LTC3528BEDDB-2#PBF — Ficha de datos

LTC3528B-2
1A, 2MHz Synchronous
Step-Up DC/DC Converter
in 2mm Г— 3mm DFN
FEATURES DESCRIPTION Delivers 3.3V at 200mA from a Single Alkaline/
NiMH Cell or 3.3V at 400mA from Two Cells
n V Start-Up Voltage: 700mV
IN
n 0.50V to 5.5V Input Range
n 1.6V to 5.25V V
OUT Range
n Up to 94% Efficiency
n Output Disconnect
n 2MHz Fixed Frequency Operatio V > V
IN
OUT Operatio Integrated Soft-Start
n Current Mode Control with Internal Compensatio Low Noise PWM Operatio Internal Synchronous Rectifier
n Logic Controlled Shutdown: (VCNTRL/(VIN + 0.4) – 1) MΩ ZETEX ZC2811E
VCNTRL 1M Figure 1. Recommended Shutdown Circuits
when Driving SHDN Above VIN 3528b2fa 8 LTC3528B-2
OPERATION (Refer to Block Diagram) Error Amplifier Synchronous Rectifier The error amplifier is a transconductance type. The noninverting input is internally connected to the 1.20V reference
and the inverting input is connected to FB. Clamps limit
the minimum and maximum error amp output voltage for …