5A, 18V, 650kHz, ACOT^® Synchronous Step-Down Converter

RT6202A/RT6202B

The RT6202A/B is a synchronous step-down DC/DC converter with Advanced Constant On-Time (ACOT^®) mode control. It achieves high power density to deliver up to 5A output current from a 4.5V to 18V input supply. The proprietary ACOT^® 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, RT6202A/B keeps an excellent constant switching frequency under line and load variation and the integrated synchronous power switches with the ACOT^® 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 RT6202A/B. The RT6202A/B are available in the SOP-8 (Exposed Pad) package.

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.

	RT6202A	RT6202B
Status	EOL	EOL
Vin (min) (V)	4.5	4.5
Vin (max) (V)	18	18
Number of Outputs	1	1
Vout (min) (V)	0.765	0.765
Vout (max) (V)	8	8
Output Adj. Method	Resistor	Resistor
Iout (max) (A)	5	5
Current Limit (typ) (A)	6.9	6.9
Freq (typ) (kHz)	650	650
Ext Sync	No	No
Ron_HS (typ) (mOhm)	120	120
Ron_LS (typ) (mOhm)	35	35
Iq (typ) (mA)	1	1
Features	ACOT Control;Adjustable Soft-Start;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;PSM;SCP;Stable with Ceramic Capacitor;UVP	ACOT Control;Adjustable Soft-Start;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;SCP;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8	PSOP-8