AS1341

AS1341 2 0 V, 6 0 0 m A , 1 0 0 % D u t y C y c le , St e p - D o w n C o n v e r t e r www.datasheet4u.com D a ta S he e t 1 General Description 2 Key Features ! ! ! ! ! ! ! ! ! ! ! ! ! The AS1341 is a high-efficiency step-down converter with adjustable output voltages from 1.25V to VIN using supply voltages of up to 20V. An integrated current-limited 0.4Ω MOSFET delivers load currents up to 600mA. The AS1341 also includes a 100% duty cycle LDO mode with a low dropout of only 250mV for high efficiency if input voltages is in the range of the output voltage. The AS1341 has a low quiescent current (12µA) to improve light-load efficiency and minimize battery use, and draws only 0.8µA in shutdown mode. High switching frequencies (up to 200kHz) allow the use of small surface-mount inductors and output capacitors. The device is available in a TDFN-8 3x3mm pin package. Output Voltages: Fixed 5V or Adjustable Input Voltage Range: 4.5 to 20V Output Current: Up to 600mA 1.25V Lowest Output Voltage Efficiency: up to 96% Quiescent Supply Current: 12µA Power-OK Output Internal 0.4Ω P-Channel MOSFET Shutdown Current: 0.8µA 100% Maximum Duty Cycle for Low Dropout Current-Limited Architecture Thermal Shutdown TDFN-8 3x3mm Package 3 Applications The device is ideal for notebook computers, distributed power systems, keep-alive supplies, and any other battery-operated, portable device. Figure 1. Typical Application 4.5 to 20V 5 IN 4 LX D1 L1 5V + COUT FB 1 GND 2 8 OUT 7 SHDNN CIN...