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LP3907QTLX-VXSS/NOPB Datasheet(PDF) 21 Page - Texas Instruments

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Part # LP3907QTLX-VXSS/NOPB
Description  Dual High-Current Step-Down DC-DC And Dual Linear Regulator
PDF  53 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP3907QTLX-VXSS/NOPB Datasheet(HTML) 21 Page - Texas Instruments

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LP3907-Q1
www.ti.com
SNVSA55A – DECEMBER 2014 – REVISED MAY 2015
Table 6. Power-Off Timing Specification
DESCRIPTION
MIN
NOM
MAX
UNIT
t1
Programmable Delay from EN_T deassertion to VCC_Buck1 Off
1.5
ms
t2
Programmable Delay from EN_T deassertion to VCC_Buck2 Off
2
ms
t3
Programmable Delay from EN_T deassertion to VCC_LDO1 Off
3
ms
t4
Programmable Delay from EN_T deassertion to VCC_LDO2 Off
6
ms
8.3.3 Flexible Power-On Reset (Power Good with Delay)
The LP3907-Q1 is equipped with an internal Power-On-Reset (POR) circuit which monitors the output voltage
levels on Bucks 1 and 2. The nPOR is an open drain logic output which is logic LOW when either of the buck
outputs are below 91% of the rising value , or when one or both outputs fall below 82% of the desired value. The
time delay between output voltage level and nPOR is enabled is (50 µs, 50 ms, 100 ms, 200 ms) 50 ms by
default. The system designer can choose the external pull-up resistor (that is, 100 k
Ω) for the nPOR pin.
Copyright © 2014–2015, Texas Instruments Incorporated
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