8A, 24V, 600kHz Step-Down Converter with Synchronous Gate Driver

RT7258

The RT7258 is a synchronous step-down DC/DC converter with an integrated high side internal power MOSFET and a gate driver for a low side external power MOSFET. It can deliver up to 8A output current from a 4.5V to 24V input supply. The RT7258's current mode architecture allows the transient response to be optimized over a wider input voltage and load range. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The RT7258 is synchronizable to an external clock with frequency ranging from 300kHz to 1.5MHz.
The RT7258 is available in WDFN-14L 4x3 and SOP-8 (Exposed Pad) packages.

Applications

Point of Load Regulator in Distributed Power System
Digital Set top Boxes
Personal Digital Recorders
Broadband Communications
Flat Panel TVs and Monitors

Key Spec.

	RT7258
Status	Active
Vin (min) (V)	4.5
Vin (max) (V)	24
Number of Outputs	1
Vout (min) (V)	0.808
Vout (max) (V)	15
Output Adj. Method	Resistor
Iout (max) (A)	8
Current Limit (typ) (A)	13
Freq (typ) (kHz)	600
Freq (min) (kHz)	300
Freq (max) (kHz)	1500
Ext Sync	Yes
Ron_HS (typ) (mOhm)	45
Iq (typ) (mA)	0.9
Features	Built-in Bootstrap Switch;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;External Synchronization;Force PWM;Internal Compensation;OCP;OTP;Power Good;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8;WDFN4x3-14