Data Sheet

7

Rev. 1.2, 2009-11-18

TLE4254

General Product Characteristics

4.2

Functional Range

Note: Within the functional range the IC operates as described in the circuit description. The electrical

characteristics are specified within the conditions given in the related electrical characteristics table.

4.3

Thermal Resistance

Pos.

Parameter

Symbol

Limit Values

Unit

Conditions

Min.

Max.

4.2.1

Input Voltage

V

I

445

V

V

4.2.1

Adjust / Enable Input Voltage

(Voltage Tracking Range)

V

ADJ/EN

2.0

–

V

–

4.2.2

Junction Temperature

T

j

-40

150

°C–

4.2.3

Output Capacitor

C

Q

1–

µF

1) Not subject to production test; specified by design.

4.2.4

ESR

CQ

–5

Ω

– 1)

Pos.

Parameter

Symbol

Limit Values

Unit

Conditions

Min.

Typ.

Max.

PG-DSO-8:

4.3.1

Junction to Ambient

R

thJA

–

155

–

K/W

1) Not subject to production test; specified by design.

2) Package mounted on PCB FR4; 80 x 80 x 1.5 mm; 35 µm Cu, 5 µm Sn; horizontal position; zero airflow.

4.3.2

–

96

–

K/W

4.3.3

–

86

–

K/W

PG-DSO-8 exposed pad:

4.3.4

Junction to Case

R

thJC

–

15

–

K/W

measured to exposed pad

4.3.5

Junction to Ambient

R

thJA

–47

–

K/W

3) Specified

R

(Chip+Package) was simulated on a 76.2 x 114.3 x 1.5 mm³ board with 2 inner copper layers (2 x 70µm Cu, 2 x 35µm Cu).

Where applicable a thermal via array under the exposed pad contacted the first inner copper layer.

4.3.6

–

159

–

K/W

Footprint only 2) 1)

4.3.7

–

71

–

K/W

4.3.8

–

60

–

K/W