Dual 1A/1.5A-1.2MHz Synchronous Step-Down Converters

RT8012A

The RT8012A is a dual PWM, current mode, stepdown converter. Its input voltage range is from 2.6V to 5.5V and has a constant 1.2MHz switching frequency, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. Each output voltage is adjustable from 0.8V to 5V. Internal power switches with low on-resistance of the dual step-down regulators increase efficiency and eliminate the need for external Schottky diodes. The RT8012A can run at 100% duty cycle for low dropout operation that extends battery life in portable systems. With independent Enable and Power-Good pins, it is easy to control the power up sequence of the two converters, which is important in some applications.

Applications

Portable Instruments
Microprocessors and DSP Core Supplies
Cellular Phones
Wireless and DSL Modems
PC Cards
Digital Cameras

Key Spec.

	RT8012A
Status	Active
Vin (min) (V)	2.6
Vin (max) (V)	5.5
Number of Outputs	2
Vout (min) (V)	0.8
Vout (max) (V)	5
Output Adj. Method	Resistor
Iout (max) (A)	1;1.5
Current Limit (typ) (A)	1.6;2.2
Freq (typ) (kHz)	1200
Ext Sync	No
Ron_HS (typ) (mOhm)	180;300
Ron_LS (typ) (mOhm)	260;90
Iq (typ) (mA)	0.83
Features	100% Duty Cycle;Current Mode Control;Enable Input;Force PWM;Internal Compensation;OCP;Power Good;Stable with Ceramic Capacitor;UVP
Package Type	WQFN4x4-16