TLE9261-3QX Datasheet, PDF (65/186 Pages) Infineon Technologies AG – Dedicated Data Sheets are available for the different product variants

8
External Voltage Regulator 3
8.1
Block Description
TLE9261-3QX
External Voltage Regulator 3
VS
VCC3SH
VCC3B
VCC3REF
R_BE
V_S - V_CC3shunt
> V_{shunt_threshold}
State Machine
I_CC3base
+
- _VREF
Figure 22 Functional Block Diagram
Functional Features
• 5V / 3.3V low-drop voltage regulator with external PNP transistor (up to 350mA with 470mΩ 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 < 150mΩ @ 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 18 ¹⁾External Voltage Regulator Configurations depending on VCC1 output voltage
VCC1 configuration VCC3 voltage for VCC3_ V_CFG = 0
VCC3 voltage for VCC3_ V_CFG = 1
VCC1 = 5.0V
VCC3 = 5.0V
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
65
Rev. 1.1, 2014-09-26