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TPS60302DGSR Fiches technique(PDF) 10 Page - Texas Instruments

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No de pièce TPS60302DGSR
Description  TPS6030x Single-Cell to 3-V or 3.3-V, 20-mA Dual Output, High-Efficiency Charge Pump
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
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TPS60302DGSR Fiches technique(HTML) 10 Page - Texas Instruments

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TPS60300, TPS60301, TPS60302, TPS60303
SLVS302B – DECEMBER 2000 – REVISED OCTOBER 2015
www.ti.com
9.3 Feature Description
9.3.1 Power-Good Detector
The power-good output is an open-drain output on the TPS60300 and TPS60301 or a push-pull output on the
TPS60302 and TPS60303. The PG-output pulls low when the output of OUT2 is out of regulation. When the
output rises to within 98% of regulation, the power-good output goes active high. In shutdown, power-good is
pulled low. In normal operation, an external pullup resistor with the TPS60300 and TPS60301 is typically used to
connect the PG pin to VOUT. The resistor should be in the 100-kΩ to 1-MΩ range. If the PG output is not used, it
should remain unconnected. Output current at PG (TPS60302, TPS60303) will reduce maximum output current
at OUT2.
9.4 Device Functional Modes
9.4.1 Start-up Procedure
The device is enabled when EN is set from logic low to logic high. CP1 will first enter a DC start-up mode during
which the capacitor on OUT1 is charged up to about VIN. After that, it starts switching to boost the voltage further
up to about two times VIN. CP2 will then follow and charge up the capacitor on OUT2 to about the voltage on
OUT1, after that, it will also start switching and boost up the voltage to its nominal value. EN must not exceed the
highest voltage applied to the device.
NOTE
During start-up with VOUT = 0 V, the highest voltage is the input voltage.
9.4.2 Shutdown
Driving EN low disables the converter. This disables all internal circuits, reducing input current to only 0.05 µA.
Leakage current drawn from the output pins OUT1 and OUT2 is a maximum of 1 µA. The device exits shutdown
once EN is set high (see Start-up Procedure). The typical no-load, start-up time is 400 µs. When the device is
disabled, the load is isolated from the input. This is an important feature in battery operated products because it
extends the battery shelf life.
10
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Copyright © 2000–2015, Texas Instruments Incorporated
Product Folder Links: TPS60300 TPS60301 TPS60302 TPS60303


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