GENERAL DESCRIPTION
Supply current during operation is only 25μA and drops to ≤1μA in shutdown. Automatic Burst Mode operation increases efficiency at light loads, further extending battery life. Switching frequency is internally set at 1.2MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Anti-ringing control circuitry reduces EMI concerns by damping the inductor in DCM mode. The internal short protect circuitry can protect battery when output short to ground. The PT1311 is available in a SOT23-6 package. FEATURES
z z z z z z z z z z z z z High Efficiency: Up to 93% Very Low Quiescent Current: Only 25μA During Operation 600mA Output Current 0.85V to 4.2V Input Voltage Range 1.2MHz Constant Frequency Operation No Schottky Diode Required Anti-ringing Control Minimizes EMI Output Short Protect Shutdown Mode Draws≤1μA Supply Current Current Mode Operation for Ex...
PowTech
