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The RT6550A is a step-down, controller generating supply voltages for battery-powered systems. It includes Pulse-Width Modulation (PWM) controller adjustable from 2V to 5.5V, and a 5V linear regulator which provides up to 100mA output current. Other features include on-board power-up sequencing, internal soft-start, and soft-discharge output that prevents negative voltage during shutdown. A constant current ripple PWM control scheme operates without sense resistors and provides 100ns response to load transient. The RT6550A is available in the WDFN-10L 3x3 package.
Support Connected Shutdown Mode for Ultrabook
CCRCOT Control with 100ns Load Step Response
PWM Maximum Duty Ratio > 98%
5V to 25V Input Voltage Range
2V to 5.5V Output Voltage Range
5V LDO with 100mA Output Current
Internal Frequency Setting with 300kHz @ VIN =12V
Internal Soft-Start and Soft-Discharge
4700ppm/°C RDS(ON) Current Sensing
Independent Switcher Enable Control
Built-In OVP/UVP/OCP/OTP
Non-Latch UVLO
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