4A, 2MHz, Synchronous Step-Down Converter

RT8070

The RT8070 is a simple, easy-to-use current mode controlled 4A synchronous step-down DC-DC converter with an input supply voltage range from 2.7V to 5.5V. The device built-in an accurate 0.8V reference voltage and integrates low R_DS(ON) power MOSFETs to achieve high efficiency in both WDFN-8L 3x3 and SOP-8 (Exposed Pad) packages. The RT8070 operates in automatic PSM that maintains high efficiency during light load operation. The device features cycle-by-cycle current-limit protection to prevent the device from the catastrophic damage in output short circuit, over-current or inductor saturation. Adjustable soft-start function prevents inrush current during start-up. The device also features input under-voltage lockout, output under-voltage protection, and over-temperature protection to provide safe and smooth operation in all operating conditions.

應用

LCD TVs and Monitors
Notebook Computers
Distributed Power Systems
IP Phones
Digital Cameras

主要規格

	RT8070
Status	Active
Vin (min) (V)	2.7
Vin (max) (V)	5.5
Number of Outputs	1
Vout (min) (V)	0.8
Vout (max) (V)	5
Output Adj. Method	Resistor
Iout (max) (A)	4
Current Limit (typ) (A)	5.8
Freq (typ) (kHz)	1000
Freq (min) (kHz)	200
Freq (max) (kHz)	2000
Ext Sync	No
Ron_HS (typ) (mOhm)	110
Ron_LS (typ) (mOhm)	70
Iq (typ) (mA)	0.46
Features	100% Duty Cycle;Adjustable Frequency;Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8;WDFN3x3-8