RT6217A/B
Parameter
Feedback Voltage
Feedback Threshold Voltage
Internal MOSFET
High-Side Switch On-Resistance
Low-Side Switch On-Resistance
Current Limit
Low-Side Switch Valley Current Limit I
LIM_L
High-Side Switch Peak Current Limit I
LIM_H
Switching Frequency
Switching Frequency
On-Time Timer Control
Maximum Duty Cycle
Minimum On-Time
Thermal Shutdown
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
Output Under Voltage Protections
UVP Trip Threshold
Power Good
Power-Good High Threshold
Power-Good High Hysteresis
Power-Good Low Threshold
Power-Good Low Hysteresis
V
TH_PGLH
V
TH_PGHL
V
FB
rising. PGOOD goes high.
V
FB
rising. PGOOD goes low.
--
--
--
--
95
5
115
5
--
--
--
--
%
%
%
%
V
TH_PGLH
V
FB
falling. PGOOD goes low.
V
TH_PGHL
V
FB
falling. PGOOD goes high.
UVP detect
Hysteresis
--
--
50
10
--
--
%
%
T
SD
T
SD
--
--
160
25
--
--
C
C
D
MAX
t
ON_MIN
--
--
90
60
--
--
%
ns
f
SW
420
500
620
kHz
3.3
4.5
4.2
5.5
4.9
6.5
A
A
R
DS(ON)_H
R
DS(ON)_L
V
BOOT
V
SW
= 4.8V
--
--
85
40
--
--
m
m
V
TH_FB
779
791
803
mV
Symbol
Test Conditions
Min
Typ
Max
Unit
Note 1.
Stresses beyond those listed under
“Absolute
Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions may affect device reliability.
Note 2.
θ
JA
is measured under natural convection (still air) at T
A
= 25°C with the component mounted on a high effective-
thermal-conductivity four-layer test board on a JEDEC 51-7 thermal measurement standard. The first layer of cooper
area is filled.
θ
JC
is measured at the lead of the package.
Note 3.
Devices are ESD sensitive. Handling precaution is recommended.
Note 4.
The device is not guaranteed to function outside its operating conditions.
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6217A/B-01 October 2018
www.richtek.com
7
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
