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| TLD5095EL_15 Datasheet, PDF (19/35 Pages) Infineon Technologies AG – Multitopology LITIX Power DC/DC Controller IC | |||
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Infineon® LITIX⢠Power
TLD5095EL
Linear Regulator
8
Linear Regulator
Description
The internal linear voltage regulator supplies the internal gate drivers with a typical voltage of 5 V and current
up to ILIM,min (parameter 8.2.2). An external output capacitor with ESR lower than RIVCC,ESR (parameter
8.2.5) is required on pin IVCC for stability and buffering transient load currents. During normal operation the
external MOSFET switches will draw transient currents from the linear regulator and its output capacitor.
Proper sizing of the output capacitor must be considered to supply sufficient peak current to the gate of the
external MOSFET switches.
Integrated Undervoltage Protection for the External Switching MOSFET
An integrated undervoltage reset threshold circuit monitors the linear regulator output voltage (VIVCC) and resets
the device in case the output voltage falls below the IVCC undervoltage reset switch OFF threshold (VIVCC,RTH,d).
The undervoltage reset threshold for the IVCC pin helps to protect the external switches from excessive power
dissipation by ensuring the gate drive voltage is sufficient to enhance the gate of an external logic level n-channel
MOSFET.
IN
14
IVCC
1
Linear Regulator
EN / PWMI
13
Gate
Drivers
LinReg_BlckDiag.vsd
Figure 8-1 Voltage Regulator Block Diagram and Simplified Application Circuit
Data Sheet
19
Revision 1.4
2015-03-11
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