AS1335

Da t as heet AS1335 www.DataSheet4U.com 1 . 5 A , 1 . 5 M H z , S y n c h r o n o u s D C / D C St e p - D o w n C o n v e r t e r 1 General Description The AS1335 is a high-efficiency, constant-frequency synchronous buck converter available in a fixed or an adjustable output voltage version. The wide input voltage range (2.6V to 5.25V), the high output current (up to 1.5A) and minimal external component requirements make the AS1335 perfect for any single Li-Ion batterypowered application. Typical supply current with no load is 400µA and decreases to ≤1µA in shutdown mode. The highly efficient duty cycle (100%) provides low dropout operation, prolonging battery life in portable systems. The device also offers a power-ok signal with a 215ms delay, which can be reseted or delayed further via the RSI pin. 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. The AS1335 is available in a 10-pin TDFN 3x3mm package. 2 Key Features ! ! ! ! ! ! ! ! ! ! ! High Efficiency: Up to 96% Output Current: 1.5A Input Voltage Range: 2.6V to 5.25V Output Voltage Range: 0.6V to VIN Constant Frequency Operation: 1.5MHz No Schottky Diode Required Power OK with 215ms delay Low Dropout Operation: 100% Duty Cycle Low Quiescent Supply Current: 400µA Shutdown Mode Supply Current: ≤1µA Current Mode Operation for Excellent Line/Load Tra...