®
RT6210
500mA, 80V, 350kHz Synchronous Step-Down Converter
General Description
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.
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
μ
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
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
Simplified Application Circuit
Efficiency vs. Output Current
100
C
BOOT
90
80
V
IN
C
IN
VIN
RT6210
BOOT
SW
Efficiency (%)
70
60
50
40
30
20
10
0
0
0.1
0.2
0.3
0.4
0.5
L1
R1
V
OUT
Enable
EN
SS
COMP GND
C
C
C
SS
C
P
R
C
FB
C
FF
R2
C
OUT
V
IN
=
V
IN
=
V
IN
=
V
IN
=
V
IN
=
24V
36V
48V
60V
80V
V
OUT
= 12V
Output Current (A)
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6210-01 February 2019
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
