5A, 32V, 500kHz Step-Down Converter

RT8289

The RT8289 is a step-down regulator with an internal Power MOSFET. It achieves 5A 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. The RT8289 provides protections such as cycle-by-cycle current limiting and thermal shutdown. In shutdown mode, the regulator draws 25μA of supply current.

The RT8289 requires a minimum number of external components, to provide a compact solution.

The RT8289 is available in a SOP-8 (Exposed Pad) package.

Applications

Distributive Power Systems
LCD TV
DSL Modems
Pre-regulator for Linear Regulators
Battery Charger

Key Spec.

	RT8289
Status	Active
Vin (min) (V)	5.5
Vin (max) (V)	32
Number of Outputs	1
Vout (min) (V)	1.222
Vout (max) (V)	26
Output Adj. Method	Resistor
Iout (max) (A)	5
Current Limit (typ) (A)	6.8
Freq (typ) (kHz)	500
Ext Sync	No
Ron_HS (typ) (mOhm)	100
Iq (typ) (mA)	0.8
Features	Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;Internal Compensation;OCP;OTP;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8