3A, 36V, 500kHz Current Mode Asynchronous Step-Down Converter

RT2808A

The RT2808A is a current mode asynchronous step-down converter that achieves excellent load and line regulation. Over a wide input voltage range from 5.5V to 36V and supports output current up to 3A. The Current mode operation provides fast transient response and eases loop stabilization.An adjustable soft-start reduces the stress on the input source at startup. In shutdown mode, the regulator draws only 25μA of supply current. The RT2808A requires a minimum number of readily available external components, providing a compact solution. The RT2808A provides protection functions inducing input under voltage lockout, cycle-by-cycle current limit, short circuit protection and thermal shutdown protection. The RT2808A is available in the SOP-8 (Exposed Pad) package.

Applications

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

Key Spec.

	RT2808A
Status	Active
Vin (min) (V)	5.5
Vin (max) (V)	36
Number of Outputs	1
Vout (min) (V)	1.222
Vout (max) (V)	26
Output Adj. Method	Resistor
Iout (max) (A)	3
Current Limit (typ) (A)	5.25
Freq (typ) (kHz)	500
Ext Sync	No
Ron_HS (typ) (mOhm)	110
Iq (typ) (mA)	0.6
Features	Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;Internal Compensation;OCP;OTP;SCP;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8