2A, 17V, 340/800kHz Synchronous Step-Down Converter

RT7250A/RT7250B

The RT7250A/B is a high efficiency, monolithic synchronous step-down DC-DC converter that can operate at 340kHz/800kHz, while delivering up to 2A output current from a 4V to 17V input supply. The RT7250A/B's current mode architecture allows the transient response to be optimized. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. Fault conditions also include output under voltage protection, output over voltage protection and thermal shutdown. The low current (<5μA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7250A/B is available in a SOP-8 (Exposed Pad) package.

Applications

Industrial and Commercial Low Power Systems
Computer Peripherals
LCD Monitors and TVs
Green Electronics/Appliances
Point of Load Regulation for High-Performance DSPs, FPGAs, and ASICs

Key Spec.

	RT7250A	RT7250B
Status	Active	Active
Vin (min) (V)	4	4
Vin (max) (V)	17	17
Number of Outputs	1	1
Vout (min) (V)	0.8	0.8
Vout (max) (V)	12	12
Output Adj. Method	Resistor	Resistor
Iout (max) (A)	2	2
Current Limit (typ) (A)	3.6	3.6
Freq (typ) (kHz)	340	800
Ext Sync	No	No
Ron_HS (typ) (mOhm)	155	155
Ron_LS (typ) (mOhm)	150	150
Iq (typ) (mA)	0.6	0.6
Features	Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;Internal Compensation;OCP;OTP;OVP;Power Good;Stable with Ceramic Capacitor;UVP	Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;Internal Compensation;OCP;OTP;OVP;Power Good;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8	PSOP-8