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TPS630241YFFT Datasheet(PDF) 10 Page - Texas Instruments

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No. de Pieza. TPS630241YFFT
Descripción  High Current, High Efficiency Single Inductor Buck-Boost Converter
Descarga  29 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS630241YFFT Datasheet(HTML) 10 Page - Texas Instruments

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PGND
PGND
VIN
VOUT
+
-
VREF
PGND
PGND
FB
VOUT
L2
L1
VIN
VINA
PFM/PWM
EN
GND
Current
Sensor
Gate
Control
Modulator
Oscillator
Device
Control
Temperature
Control
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+
PGND
EN
TPS63024
TPS630241, TPS630242
SLVSCK8A – NOVEMBER 2014 – REVISED DECEMBER 2014
www.ti.com
Functional Block Diagram (continued)
Functional Block Diagram (Fixed Output Voltage)
9.3 Feature Description
9.3.1 Undervoltage Lockout (UVLO)
To avoid mis-operation of the device at low input voltages, an undervoltage lockout is included. UVLO shuts
down the device at input voltages lower than typically 1.7V with a 70 mV hysteresis.
9.3.2 Output Discharge Function
When the device is disabled by pulling enable low and the supply voltage is still applied, the internal transistor
use to discharge the output capacitor is turned on, and the output capacitor is discharged until UVLO is reached.
This means, if there is no supply voltage applied the output discharge function is also disabled. The transistor
which is responsible of the discharge function, when turned on, operates like an equivalent 120
Ω resistor,
ensuring typically less than 10ms discharge time for 20uF output capacitance and a 3.3V output.
9.3.3 Thermal Shutdown
The device goes into thermal shutdown once the junction temperature exceeds typically 140°C.
10
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Product Folder Links: TPS630241 TPS630242


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