500mA, 80V, 350kHz Synchronous Step-Down Converter

RT6210

The RT6210 is a 80V, 500mA, 350kHz, high-efficiency, synchronous step-down DC-DC converter with an input-voltage range of 5.2V to 80V and a programmable output-voltage range of 0.8V to 72V. It features current-mode control to simplify external compensation and to optimize transient response with a wide range of inductors and output capacitors. High efficiency can be achieved through integrated N-MOSFETs, and pulse-skipping mode at light loads. With EN pin, power-up sequence can be more flexible and shutdown quiescent current can be reduced to < 3μA. The RT6210 features cycle-by-cycle current limit for over-current protection against short-circuit outputs, and user-programmable soft-start time to prevent inrush current during startup. It also includes input under-voltage lockout, output under-voltage, and thermal shutdown protection to provide safe and smooth operation in all operating conditions.

The RT6210 is available in the SOP-8 (Exposed pad) package.

Applications

4-20mA Loop-Powered Sensors
OBD-II Port Power Supplies
Low-Power Standby or Bias Voltage Supplies
Industrial Process Control, Metering, and Security Systems
High-Voltage LDO Replacement
Telecommunications Systems
Commercial Vehicle Power Supplies
General Purpose Wide Input Voltage Regulation

Key Spec.

	RT6210
Status	Active
Vin (min) (V)	5.2
Vin (max) (V)	80
Number of Outputs	1
Vout (min) (V)	0.8
Vout (max) (V)	72
Output Adj. Method	Resistor
Iout (max) (A)	0.5
Current Limit (typ) (A)	0.86
Freq (typ) (kHz)	350
Ext Sync	No
Ron_HS (typ) (mOhm)	660
Ron_LS (typ) (mOhm)	330
Iq (typ) (mA)	0.6
Features	Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;OTP;PSM;Stable with Ceramic Capacitor;UVP
Package Type	PSOP-8

Features

0.8V Feedback Reference Voltage with ±1.5% Accuracy
Wide Input Voltage Range : 5.2V to 80V
Output Current : 500mA
Integrated N-MOSFETs
Current-Mode Control
Fixed Switching Frequency : 350kHz
Programmable Output Voltage : 0.8V to 72V
Low < 3μA Shutdown Quiescent Current
Up to 92% Efficiency
Pulse-Skipping Mode for Light-Load Efficiency
Programmable Soft-Start Time
Cycle-by-Cycle Current Limit Protection
Input Under-Voltage Lockout, Output Under-Voltage and Thermal Shutdown Protection