ST1S32 Datasheet | STMicroelectronics

4 A DC step-down switching regulator - production data Features - 4 A DC output current - 2.8 V to 5.5 V input voltage - Output voltage adjustable from 0.8 V - 1.5 MHz switching frequency - Internal soft-start and enable - Integrated 60 mΩ and 45 mΩ Power MOSFETs - All ceramic capacitor - Power Good (POR) - Cycle-by-cycle current limiting - Current foldback short-circuit protection - VFDFPN 8 4x4x1.0 package Applications - µP/ASIC/DSP/FPGA core and I/O supplies - Point of Load for: STB, TV, DVD - Optical storage, hard disk drives, printers, audio/graphic cards VFDFPN 8 4x4x1.0 Description The ST1S32 is an internally pensated 1.5 MHz fixed-frequency PWM synchronous stepdown regulator. The ST1S32 operates from 2.8 V to 5.5 V input, while it regulates an output voltage as low as 0.8 V and up to VIN. The ST1S32 integrates a 60 mΩ high-side switch and a 45 mΩ synchronous rectifier, allowing very high efficiency with very low output voltages. The peak current mode control with internal pensation delivers a very pact solution with a minimum ponent count. The ST1S32 is available in 4 mm x 4 mm, 8-lead VFDFPN package. Figure 1. Application circuit VOUT VINSW VINA Cin_a R3...