DS9746 Datasheet, PDF (4/10 Pages) Richtek Technology Corporation – VBUS OVP with a PTVS Diode

RT9746
Parameter
Symbol
Test Conditions
Min
OVP Hysteresis
VOVP_HYS
Falling
--
OVP Propagation Delay to
Turn Off VBUSOUT
tOVP_PD
VBUS = 5V to 10V, (6V/s)
--
OVP Recover Delay
tOVP_RD
VBUS = 10V to 5V
--
OCP Threshold Current IOCP
--
OCP Blanking Time
tOCP_B
--
OCP Recover delay
tOCP_RD
--
OTP Threshold to turn off
only for VBUS_OUT
TOTP_FET
Rising (Note5)
--
OTP Threshold Hysteresis
only for VBUS_OUT
TOTP_FET_HYS
Falling
(Note5)
--
OTP Recover Delay
tOTD_RD
--
OCP Soft-Start Time
FET On Resistance
External OVP Set
Threshold
tss
RON_FET
VREF_EXT
--
IBUS_OUT = 1000mA, VBUS = 5V
TA = 25°C
--
--
External OVP Adjustment
Range
VOVP_EXT
4
External OVP Select
Threshold (Rising)
VOVP_SEL
--
External OVP Select
Threshold Hysteresis
--
WRNB Open-Drain
Impedance
VBUS = 5V
--
TYP
150
0.18
8
4.5
180
64
160
20
8
8
35
1.2
--
0.3
100
--
Max Unit
--
mV
0.25 s
--
ms
5
A
--
s
--
ms
--
°C
--
°C
--
ms
--
ms
42 m
--
V
20
V
--
V
--
mV
15

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.
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. Guaranteed by design.
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
DS9746-00 March 2016