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AS1341 Arkusz danych(PDF) 1 Page - ams AG |
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AS1341 Arkusz danych(HTML) 1 Page - ams AG |
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1 / 17 page  AS1341 20V, 600mA, 100% Duty Cycl e, Step-Down Converter www.austriamicrosystems.com Revision 1.05 1 - 17 Datasheet 1 General Description 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 0.4 Ω 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 effi- ciency if input voltages is in the range of the output volt- age. 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 pack- age. Figure 1. AS1341 - Typical Application 2 Key Features ! Output Voltages: Fixed 5V or Adjustable ! Input Voltage Range: 4.5V to 20V ! Output Current: Up to 600mA ! 1.25V Lowest Output Voltage ! Efficiency: up to 96% ! Quiescent Supply Current: 12µA ! Power-OK Output ! Internal 0.4 Ω 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 bat- tery-operated, portable device. VIN 4.5V to 20V 5 IN 1 FB CIN VOUT = 5V AS1341 2 GND 8 OUT D1 COUT + Indicates High-Power Trace 3 POK RPULL 7 SHDNN 6 ILIMIT 4 LX L1 |
Podobny numer części - AS1341_1 |
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Podobny opis - AS1341_1 |
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