RT7250A/B
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Minimum On Time
t
--
100
--
ns
ON
Input Under Voltage Lockout
Threshold
Input Under Voltage Lockout
Threshold Hysteresis
V
--
--
3.5
--
--
V
UVLO
ΔV
200
mV
UVLO
Logic-High V
2.5
--
--
--
--
0.4
--
IH
EN Threshold
Voltage
V
Logic-Low
VIL
EN Pull Low Current
Soft-Start Period
V
EN
= 2V, V = 1V
--
1
μA
ms
°C
FB
t
SS
--
1
--
Thermal Shutdown
T
--
150
--
SD
Thermal Shutdown
Hysteresis
Power Good Threshold
Rising
Power Good Threshold
Hysteresis
Power Good Pull Down
Resistance
ΔT
--
--
--
15
0.7
130
--
--
--
°C
V
SD
mV
Ω
--
--
--
12
125
10
--
--
--
Output OVP Threshold
%V
REF
Output OVP Propagation
Delay
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.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Copyright 2012 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS7250A/B-01 May 2012
www.richtek.com
5
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
