TLE9263QX
External Voltage Regulator 3
8
External Voltage Regulator 3
8.1
Block Description
VS
VCC3SH
VCC3B
VCC3REF
RBE
ICC3base
VS - VCC3shunt
> Vshunt_threshold
+
-
VREF
State Machine
Figure 17 Functional Block Diagram
Functional Features
•
•
•
5V / 3.3V low-drop voltage regulator with external PNP transistor (up to 350mA with 470mꢀ shunt resistor)
Four high-voltage pins are used: VS, VCC3B, VCC3SH, VCC3REF
Configurable as stand-alone regulator (5V or 3.3V output voltage selectable via SPI) or in load-sharing mode
with VCC1 (5V output voltage)
•
≥ 4.7µF ceramic capacitor at output voltage for stability, with ESR < 150mꢀ @ f = 10 kHz to achieve the voltage
regulator control loop stability based on the safe phase margin (bode diagram).
•
•
•
Overcurrent limitation with external shunt in stand-alone configuration
Adjustable load current sharing ratio between VCC1 and VCC3 for load-sharing configuration
Under voltage shutdown in stand-alone configuration only
Table 11
VCC1 configuration VCC3 voltage for VCC3_ V_CFG = 0
VCC1 = 5.0V VCC3 = 5.0V
1)External Voltage Regulator Configurations depending on VCC1 output voltage
VCC3 voltage for VCC3_ V_CFG = 1
VCC3 = 3.3V
1) This settings are valid only for the VCC3 stand-alone configuration. The bit VCC3_ V_CFG is ignored for VCC3 load
sharing configuration
Data Sheet
48
Rev. 1.1, 2014-09-26
INFINEON [ Infineon ]
