TLE 6365

Data Sheet Rev. 1.7

14

2003-06-02

4

Diagrams: Oscillator and Boost/Buck-Converter Performance

In the following the behaviour of the Boost/Buck-converter and the oscillator is shown.

Efficiency Buck vs.

Boost Voltage

Feedback Voltage vs.

Junction Temperature

Oscillator Frequency Deviation vs.

Junction Temperature

Buck Overcurrent Threshold vs.

Junction Temperature

AED03017

S

V

65

5

η

15

25

V 30

70

75

80

85

90

%

95

V

Load

I

= 120 mA

80 mA

40 mA

4.90

5.00

4.95

4.85

4.80

5.05

-50

-25

0

255075

100

°C

150

5.10

5.15

T

j

V

CC

V

I

AED03016

j

T

-15

OSC

-10

-5

0

5

kHz

10

-50 -25

0

25 50 75 100 ˚C 150

j

at

AED03018

-50

j

T

-25

0

25 50 75 100

˚C 150

0.8

I

OC

0.9

1

1.1

1.2

1.3

1.4

A

(Buck-Converter)

I

BUOC