RT7275/76
Parameter
PVCC Load Regulation
Output Current
Symbol
Test Conditions
Min
--
Typ
--
Max
40
Unit
mV
mA
0 < I
< 50mA
PVCC
I
V
= 6V, V = 4V
PVCC
--
110
--
PVCC
IN
On-Resistance (R
)
DS(ON)
High Side
High Side
Low Side
R
R
R
For WDFN-10L 3x3
--
--
90
100
60
--
--
DS(ON) _H
DS(ON) _H
DS(ON) _L
Switch On
Resistance
For TSSOP-14 (Exposed Pad)
mΩ
--
--
Current Limit (upper threshold) I
L
SW
= 1.4μH
3.5
4.5
5.7
A
LIM
Thermal Shutdown
Thermal Shutdown Threshold
T
--
--
150
20
--
--
°C
°C
SD
Thermal Shutdown Hysteresis ΔT
SD
On-Time and Off-Time Control
On-Time
t
t
t
V
= 12V, V = 1.05V
OUT
--
--
--
145
60
--
--
--
ns
ns
ns
ON
IN
Minimum On-Time
Minimum Off-Time
Soft-Start
ON(MIN)
230
OFF(MIN)
SS Charge Current
SS Discharge Current
VIN UVLO
V
V
= 0V
1.4
2
2.6
--
μA
SS
= 0.5V
0.05
0.1
mA
SS
V
/ V
Rising, Enable PVCC
VINR
VIN
3.55
--
3.85
0.3
4.15
--
Regulator
UVLO Threshold
V
Threshold Hysteresis
Power Good
V
V
Rising
Falling
85
--
90
85
5
95
--
FB
FB
PGOOD Threshold
PGOOD Sink Current
%
PGOOD = 0.5V
--
--
mA
Output Under Voltage and Over Voltage Protection
OVP Trip Threshold
OVP Delay Time
V
FB
Rising
115
--
120
5
125
--
%
μs
V
Falling
65
--
70
10
250
75
--
FB
UVP Trip Threshold
UVP Delay Time
%
Hysteresis
--
--
μs
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. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is
measured at the exposed pad of the package. The PCB copper area of exposed pad is 70mm2.
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 ]
