RT7275/76
Parameter
PVCC Load Regulation
Output Current
On-Resistance (R
DS(ON)
)
Switch On
Resistance
High Side
High Side
Low Side
R
DS(ON) _H
R
DS(ON) _H
R
DS(ON) _L
L
SW
= 1.4μH
For WDFN-10L 3x3
For TSSOP-14 (Exposed Pad)
--
--
--
3.5
--
--
V
IN
= 12V, V
OUT
= 1.05V
--
--
--
V
SS
= 0V
V
SS
= 0.5V
V
VIN
/ V
VINR
Rising, Enable PVCC
Regulator
Threshold Hysteresis
Power Good
PGOOD Threshold
PGOOD Sink Current
OVP Trip Threshold
OVP Delay Time
UVP Trip Threshold
UVP Delay Time
V
FB
Falling
Hysteresis
V
FB
Rising
V
FB
Falling
PGOOD = 0.5V
V
FB
Rising
85
--
--
115
--
65
--
--
90
85
5
120
5
70
10
250
95
--
--
125
--
75
--
--
%
mA
%
μs
%
μs
1.4
0.05
90
100
60
4.5
150
20
145
60
230
2
0.1
--
--
--
5.7
--
--
--
--
--
2.6
--
A
°C
°C
ns
ns
ns
μA
mA
mΩ
I
PVCC
Symbol
Test Conditions
0
<
I
PVCC
<
50mA
V
IN
= 6V, V
PVCC
= 4V
Min
--
--
Typ
--
110
Max
40
--
Unit
mV
mA
Current Limit (upper threshold) I
LIM
Thermal Shutdown
Thermal Shutdown Threshold
T
SD
Thermal Shutdown Hysteresis
ΔT
SD
On-Time and Off-Time Control
On-Time
Minimum On-Time
Minimum Off-Time
Soft-Start
SS Charge Current
SS Discharge Current
VIN UVLO
UVLO Threshold
t
ON
t
ON(MIN)
t
OFF(MIN)
3.55
--
3.85
0.3
4.15
--
V
Output Under Voltage and Over Voltage Protection
Note 1.
Stresses beyond those listed
“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. The PCB copper area of exposed pad is 70mm
2
.
Note 3.
Devices are ESD sensitive. Handling precaution is recommended.
Note 4.
The device is not guaranteed to function outside its operating conditions.
Copyright
©
2013 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
4
DS7275/76-00
January 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
