3A, 36V, Synchronous Step-Down Converter

RT2872

The RT2872 is a high efficiency, current-mode synchronous step-down DC/DC converter that can deliver up to 3A output current over a wide input voltage range from 4.5V to 36V. The device integrates 105mΩ high-side and 80mΩ low-side MOSFETs to achieve high conversion efficiency. The current-mode control architecture supports fast transient response and simple external compensation. A cycle-by-cycle current limit function provides protection against shorted output and an internal soft-start eliminates input current surge during start-up. The RT2872 provides complete protection functions such as input under-voltage lockout, output under-voltage protection, over-current protection and thermal shutdown.

The RT2872 is available in the thermal enhanced SOP-8 (Exposed Pad) package.

Applications

Point of Load Regulator in Distributed Power Systems
Digital Set Top Boxes
Broadband Communications
Vehicle Electronics
Automotive Audio, Navigation, and Information Systems
Enterprise Datacom Platforms Point of Load (POL)
Industrial Grade General Purpose Point of Load

Key Spec.

	RT2872
Status	Active
Vin (min) (V)	4.5
Vin (max) (V)	36
Number of Outputs	1
Vout (min) (V)	0.8
Vout (max) (V)	30
Output Adj. Method	Resistor
Iout (max) (A)	3
Current Limit (typ) (A)	5
Freq (typ) (kHz)	500
Freq (min) (kHz)	300
Freq (max) (kHz)	1000
Ext Sync	No
Ron_HS (typ) (mOhm)	105
Ron_LS (typ) (mOhm)	80
Iq (typ) (mA)	1
Features	AEC-Q100;Adjustable Frequency;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;OCP;OTP;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8