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APW7212

ANPEC
Part Number APW7212
Manufacturer ANPEC
Description Step-Up Converter
Published Jan 26, 2016
Detailed Description APW7212 1MHz, High-Efficiency, Step-Up Converter with Load Disconnection Features General Description • Wide 0.8V t...
Datasheet PDF File APW7212 PDF File

APW7212
APW7212

Overview
APW7212 1MHz, High-Efficiency, Step-Up Converter with Load Disconnection Features General Description • Wide 0.
8V to V Input Voltage Range OUT • Low 1.
05V (typical) Start-Up Voltage • Low 40µA No Load Bias Current • 100mA Output from a Single AA Cell Input • 250mA Output from a Dual AA Cell Input • Internal Synchronous Rectifier • Up to 92% Efficiency • <1µA Quiescent Current during Shutdown • Current-Mode Operation with Internal Compen- sation - Stable with Ceramic Output Capacitors - Fast Line Transient Response • Fixed 1MHz Oscillator Frequency • 1.
2A Current-Limit Protection • Built-In Soft-Start • Over-Temperature Protection with Hysteresis • Available in a 2mmx2mm TDFN2x2-8 and TSOT- 23-6A Packages • Halogen and Lead Free Available (RoHS Compliant) Applications • Cell Phone and Smart Phone • PDA, PMP, and MP3 • Digital Camera • Boost Regulator The APW7212 is a synchronous rectifier, fixed switching frequency (1MHz typical), and current-mode step-up regulator.
The device allows use of small inductors and output capacitors for portable devices.
The current-mode control scheme provides fast transient response and good output voltage accuracy.
At light loads, the APW7212 will automatically enter in pulse frequency modulation(PFM) operation to reduce the dominant switching losses.
During PFM operation, the IC consumes very low quiescent current and maintains high efficiency over the complete load range.
The device has a 1.
05V start-up voltage and can operate with input voltage down to 0.
8V after start-up.
The APW7212 also includes current-limit and over-temperature shutdown to prevent damage in the event of an output overload.
The APW7212 is available in 2mmx2mm TDFN2x2-8 and TSOT-23-6A packages.
Simplified Application Circuit L1 8 SW VOUT 2 VIN 0.
8V to VOUT 4.
7µH C1 4.
7µF PWM PFM/ PWM 1 VIN FB 4 APW7212 3 EN 5 PS GND 6 GND 7 R1 R2 VOUT C2 22µF Pin Configuration VIN 1 VOUT 2 EN 3 FB 4 8 SW 7 GND 6 GND 5 PS TDFN2x2-8 (Top View) SW 1 GND ...


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