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AS1324-18 Datasheet(PDF) 1 Page - ams AG |
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AS1324-18 Datasheet(HTML) 1 Page - ams AG |
1 / 20 page AS1324 1.5MHz, 600mA, DC/DC Step-Down Regulator Dat a Sh eet www.austriamicrosystems.com Revision 1.03 1 - 20 1 General Description 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. Typical supply current with no load is 30µA and decreases to ≤1µA in shutdown mode. The AS1324 is available as the standard versions listed in Table 1. 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 inter- nal 0.6V feedback reference voltage. The AS1324 is available in a 5-pin TSOT-23 package. 2 Key Features ! 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 Supply Current: ≤1µA ! Thermal Protection ! 5-pin TSOT-23 Package 3 Applications The device is ideal for mobile communication devices, laptops and PDAs, ultra-low-power systems, threshold detectors/discriminators, telemetry and remote systems, medical instruments, or any other space-limited applica- tion with low power-consumption requirements. 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 Figure 1. Typical Application Diagram – High Efficiency Step Down Converter AS1324- 18 COUT 10µF CIN 10µF GND 2 VIN = 2.7V to 5.5V VOUT = 1.8V, 600mA 4.7µH 1 EN 5 VOUT 4 VIN 3 SW 5 VOUT AS1324- 18 4 VIN 2 GND 3 SW 1 EN |
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