The RT6257A/B is a high-performance, synchronous step-down DC-DC converter that can deliver up to 6A output current from a 4.5V to 18V input supply. The device integrates low RDS(ON) power MOSFETs, accurate 0.6V reference and an integrated diode of bootstrap circuit to offer a very compact solution.
The RT6257A/B adopts Advanced Constant On-Time (ACOT®) control architecture that provides ultrafast transient response and further reduces the external-component count. In steady states, the ACOT® operates in nearly constant switching frequency over line, load and output voltage ranges and makes the EMI filter design easier.
The device offers Independent enable control input pin for easily sequence control. To control the inrush current during the startup, the device provides a fixed 1.5ms soft-start up. Fully protection features are also integrated in the device including the cycle-by-cycle current limit control, UVP, input UVLO and OTP.
The RT6257A/B is available in the TSOT-23-6 (FC) package.
Applications
- Set Top Box
- Portable TV
- Access Point Router
- DSL Modem
- LCD TV