3A, 21V 500kHz Synchronous Step-Down Converter

RT8287

The RT8287 is a synchronous step-down regulator with an internal power MOSFET. It achieves 3A of continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. An adjustable soft-start reduces the stress on the input source at startup.
The RT8287 requires a minimal number of readily available external components, providing a compact solution.

Applications

Distributive Power Systems
Battery Charger
DSL Modems
Pre-Regulator for Linear Regulators

Key Spec.

	RT8287
Status	Active
Vin (min) (V)	4.5
Vin (max) (V)	21
Number of Outputs	1
Vout (min) (V)	0.808
Vout (max) (V)	15
Output Adj. Method	Resistor
Iout (max) (A)	3
Current Limit (typ) (A)	6.5
Freq (typ) (kHz)	500
Ext Sync	No
Ron_HS (typ) (mOhm)	120
Ron_LS (typ) (mOhm)	40
Iq (typ) (mA)	0.7
Features	Adjustable Soft-Start;Current Mode Control;Enable Input;Force PWM;Internal Compensation;OCP;Power Good;Stable with Ceramic Capacitor;UVP
Package Type	WDFN4x3-14