ams AS1324
The AS1324 is a high-efficiency, constant-frequency synchronous buck converter available in adjustable- and fixed-voltage versions. The wide input voltage range (2.7V to 5.5V), automatic powersave mode and minimal external component requirements make the AS1324 perfect for any single Li-Ion battery-powered application. The AS1324 is available as the standard versions listed in Table 1.GENERAL DESCRIPTION
Typical supply current with no load is 30µA and decreases to ≤1µA in shutdown mode. Table 1. Standard Versions Model Output Voltage AS1324-AD Adjustable via External Resistors AS1324-12 Fixed: 1.2V AS1324-15 Fixed: 1.5V AS1324-18 Fixed: 1.8V An internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The internally fixed switching frequency (1.5MHz) allows for the use of small surface mount external components. Very low output voltages can be delivered with the internal 0.6V feedback reference voltage. The AS1324 is available in a 5-pin TSOT-23 package. Figure 1. Typical Application Diagram – High Efficiency Step Down Converter 2 KeyFEATURES
High Efficiency: Up to 96% Output Current: 600mA Input Voltage Range: 2.7V to 5.5V Constant Frequency Operation: 1.5MHz Variable- and Fixed-Output Voltages No Schottky Diode Required Automatic Powersave Operation Low Quiescent Current: 30µA Internal Reference: 0.6V Shutdown Mode S...