ST1S10 - STMicroelectronics

ST1S10 monolithic synchronous step-down regulator

The ST1S10 is a high efficiency step-down PWM current mode switching regulator capable of providing up to 3 A of output current. The device operates with an input supply range from 2.5 V to 18 V and provides an adjustable output voltage from 0.8 V (VFB) to 0.85 * VIN_SW [VOUT = VFB * (1 + R1/R2)]. It operates either at a 900 kHz fixed frequency or can be syn.

Features

• Step-down current mode PWM regulator
• Output voltage adjustable from 0.8 V
• Input voltage from 2.5 V up to 18 V
• 2% DC output voltage tolerance
• Synchronous rectification
• Inhibit function
• Synchronizable switching frequency from 400 kHz up to 1.2 MHz
• Internal soft start
• Dynamic short-circuit protection
• Typical efficiency: 90%
• 3 A output current capability
• Standby supply current: max. 6 µA over temperature range
• Operative junction temp.: from -40 °C to 125 °C Applications
• Consumer
  – STB, DVD, DVD recorders, TV, VCR, car audio, LCD monitors
• Networking
  – XDSL, modems, DC-.