TLE4307 Infineon Technologies, TLE4307 Datasheet - Page 3

• Manufacturer Part Number: TLE4307
• Description: Power-Charge-Pump and Low-Drop Voltage Regulator
• Manufacturer: Infineon Technologies

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Figure 2
Circuit Description
The TLE 4307 consists of 2 stages, the charge pump and the very low drop voltage
regulator.
Charge Pump
The power stage is used as a switching element, that is driven by a buffer. A current
source keeps the power stage on. When the output C of the charge pump reaches
the power stage is switched off. It is active clamped, when the input I reaches
Optional, an external capacity can be connected between pin SL and I to limit the slew
rate at the input, when an inductive load drives the IC. Saturation control as a function of
the load current prevents any over-saturation of the power element. The regulator is
additionally protected against overload and overtemperature.
Very Low Drop Regulator
The control amplifier compares a reference voltage, made highly accurate by resistance
balancing, with a voltage proportional to the output voltage and drives the base of the
series PNP transistor via a buffer. Saturation control as a function of the load current
prevents any over-saturation of the power element. The regulator is additionally
protected against overload and overtemperature.
Data Sheet Rev. 1.1
Block Diagram
SL
I
1
4
Charge
Power
Pump
TLE 4307
3
C
2
Low-Drop
Regulator
GND
Very
3
AES02793
5
Q
TLE 4307
2000-10-11
V
V
C,off
I,cl
,
.