TLE 4307

Data Sheet Rev. 1.1

4

2000-10-11

Figure 3

Application Example

Application Description

The IC is meant to be used with a DC power supply. The power charge pump limits the

energy that is needed to drive the load at the output Q of the IC. The energy is stored to

a capacity

C

switched off. Since the power supply consists of the inductance and a parasitic series

resistance, the remaining available energy is dissipated in the external power supply and

therefore does not stress the IC with this dispensable energy. The very low drop

regulator is provided with the energy, stored in

C

capacitor

C

above 22

µF and an ESR ≤ 1 Ω within the operating temperature range.

AES02794

Power

Charge

Pump

Very

Low-Drop

Regulator

TLE 4307

4

1

5

SL

I

V

Line

V

L

S

= 4 mH

R

D1

4x1N4001

or

B40C800

C

Q1

220 nF

23

C

GND

C

C

470

15 V

Q

C

Q2

22

6.3 V

C

S

100 pF

V

I