5.5A, 18V, 650kHz, ACOT® Synchronous Step-Down Converter

RT6206A

The RT6206A is a synchronous step-down DC/DC converter with Advanced Constant On-Time (ACOT^TM) mode control. It achieves high power density to deliver up to 5.5A output current from a 4.5V to 18V input supply. The proprietary ACOT^TM mode offers an optimal transient response over a wide range of loads and all kinds of ceramic capacitors, which allows the device to adopt very low ESR output capacitor for ensuring performance stabilization. In addition, RT6206A keeps an excellent constant switching frequency under line and load variation and the integrated synchronous power switches with the ACOT^TM mode operation provides high efficiency in whole output current load range. Cycle-by-cycle current limit provides an accurate protection by a valley detection of low side MOSFET and external soft-start setting eliminates input current surge during startup. Protection functions include thermal shutdown for RT6206A. The RT6206A are available in the TSSOP-14 (Exposed pad), SOP-8 (Exposed Pad) and WDFN-10L 3x3 packages.

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.

	RT6206A
Status	Active
Vin (min) (V)	4.5
Vin (max) (V)	18
Number of Outputs	1
Vout (min) (V)	0.765
Vout (max) (V)	7
Output Adj. Method	Resistor
Iout (max) (A)	5.5
Current Limit (typ) (A)	6.9
Freq (typ) (kHz)	650
Ext Sync	No
Ron_HS (typ) (mOhm)	80
Ron_LS (typ) (mOhm)	35
Iq (typ) (mA)	1
Features	ACOT Control;Adjustable Soft-Start;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;Power Good;SCP;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8;TSSOP-14(PP);WDFN3x3-10