AS1346-49

AS1346-49 Dual Step-Down Converter with Battery Monitoring 1 General Description The AS1346, AS1347, AS1348, AS1349 family is a high-efficiency, constant-frequency dual buck converter available with fixed voltage versions. The device provides two independent DC/DC Converters with output currents between 0.5A and 1.2A. The wide input voltage range (2.7V to 5.5V), automatic powersave mode and minimal external component requirements make the AS134x family perfect for SSD and many other battery-powered applications. In shutdown mode the typical supply current decreases to ≤1μA. The highly efficient duty cycle (100%) provides low dropout operation, prolonging battery life in portable systems. An internal synchronous switching scheme increases efficiency and eliminates the need for an external Schottky diode. The fixed switching frequency (2.0MHz) allows the use of small surface mount inductors. The integrated monitoring function can be configured that either the output voltage (Power Okay function ) or the input voltage (Battery Monitoring Function) can be supervised. Table 1. Available Products Devices IOUT1 IOUT2 AS1346 1.2A 0.5A AS1347 0.5A 0.5A AS1348 0.5A 0.95A AS1349 1.2A 1.2A The AS1346-49 is available in a 12-Pin TDFN 3x3mm package. Figure 1. AS1346 - Typical Application Diagram with POK Function 2 Key Features High Efficiency: Up to 95% Output Current: see Table 1 Input Voltage Range: 2.7V to 5.5V Output Voltage Range: 1.2V to 3.6V (available in 10...