RT2875A/B
Parameter
Switching Frequency1
Switching Frequency2
Switching Frequency3
Short Circuit Oscillation
Frequency
Minimum SYNC Pulse width
SYNC Input Voltage
Minimum On-Time
EN Input Voltage
Logic-High
Hysteresis
V
UVLO
V
UVLO
High-Level
Low- Level
t
ON
V
IH
EN hysteresis voltage
VIN rising
Hysteresis
Rising
Falling
V
FB
= V
REF
, V
PGOOD
= 5.5V
I
PGOOD
= 0.4mA
I
SS
T
SD
T
SD
Symbol
f
OSC1
f
OSC2
f
OSC3
Test Conditions
R
t
= 169k
R
t
= 51k
R
t
= 23k
V
FB
= 0V, R
OSC
= 100k,
V
IN
= 12V
Min
275
0.83
1.89
--
--
--
0.8
--
1.4
--
--
--
--
--
--
--
--
--
160
--
Typ
305
0.98
2.1
31.25
20
--
--
100
1.5
0.2
4.1
300
90
85
30
--
6
80
180
15
Max
335
1.13
2.31
--
--
2
--
--
1.6
--
--
--
--
--
--
0.3
--
--
200
--
Unit
kHz
MHz
MHz
kHz
ns
V
ns
V
V
mV
%
nA
V
A
C
C
Input Under-Voltage Lockout
Threshold
Power Good Threshold
Power Good Output High
Leakage Current
Power Good Output Low
Soft-Start Charge Current
SW Discharge Resistance
Thermal Shutdown
Thermal Shutdown Hysteresis
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 at T
A
= 25
°C
on a high effective thermal conductivity four-layer test board per JEDEC 51-7.
θ
JC
is
measured at the exposed pad 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.
Note 5.
Guarantee by design.
Copyright
©
2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS2875A/B-08 November 2018
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
