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TPS82150SILT Datasheet(PDF) 10 Page - Texas Instruments

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Part # TPS82150SILT
Description  17-V Input 1-A Step-Down Converter MicroSiP Module with Integrated Inductor
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS82150SILT Datasheet(HTML) 10 Page - Texas Instruments

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TPS82150
SLVSDN4 – JUNE 2017
www.ti.com
Product Folder Links: TPS82150
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Copyright © 2017, Texas Instruments Incorporated
Device Functional Modes (continued)
When the SS/TR pin voltage is between 50 mV and 1.2 V, the VOUT2 tracks the VOUT1 as described in
Equation 5.
space
(5)
space
When the SS/TR pin voltage is above 1.2 V, the voltage tracking is disabled and the FB pin voltage is regulated
at 0.8 V. For decreasing SS/TR pin voltage, the device doesn't sink current from the output. So the resulting
decreases of the output voltage may be slower than the SS/TR pin voltage if the load is light. When driving the
SS/TR pin with an external voltage, do not exceed the voltage rating of the SS/TR pin which is VIN+0.3V.
Details about tracking and sequencing circuits are found in SLVA470.
7.4.4 Power Good Output (PG)
The device has a power good (PG) output. The PG pin goes high impedance once the output is above 95% of
the nominal voltage, and is driven low once the output voltage falls below typically 90% of the nominal voltage.
The PG pin is an open drain output and is specified to sink up to 2mA. The power good output requires a pull-up
resistor connecting to any voltage rail less than 6V.
The PG pin goes low when the device is in shutdown or thermal shutdown. When the device is in UVLO, the PG
pin is high impedance. The PG signal can be used for sequencing of multiple rails by connecting it to the EN pin
of other converters. Leave the PG pin floating when it is not used. Table 1 shows the PG pin logic.
Table 1. Power Good Pin Logic
Device State
PG Logic Status
High Impedance
Low
Enable (EN=High)
VFB ≥ VTH_PG
VFB ≤ VTH_PG
Shutdown (EN=Low)
UVLO
0.7 V < VIN < VUVLO
Thermal Shutdown
TJ > TSD
Power Supply Removal
VIN < 0.7 V


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