National Semiconductor LM2770SD-12157/NOPB Current - Output: 250mA Frequency - Switching: 700kHz Internal Switch(s): Yes Mounting Type: Surface Mount Number Of Outputs: 1 Operating Temperature: -30?°C ~ 85?°C Package / Case: 10-LLP Power - Output: - Series: - Synchronous Rectifier: No Type: Step-Down (Buck), Switched Capacitor (Charge Pump) Voltage - Input: 2.7 ~ 5.5 V Voltage - Output: 1.2V, 1.58V Other Names: LM2770SD-12157, LM2770SD-12157TR