TLE4473GV55AUMA1 Datasheet TLE4473GV55AUMA1 | P4-P6

Data Sheet 4 Rev. 1.2, 2004-01-01

TLE 4473 GV55

Figure 2 Block Diagram (TLE 4473 GV55) with Typical External Components

TLE 4473 GV55

AEA03298.VSD

Current and

Saturation

Control,

Overcurrent

Protection

Overtemperature

Shutdown

Bandgap

Reference

Inhibit

Reset

Generator

Watchdog

Current and

Saturation

Control,

Overcurrent

Protection

Inhibit

Reset

Generator

GND

µF

4.7 kΩ

RO2

µC

Supply

µC

Reset

1WI

Watchdog

(from µC)

100 nF

11D2

2RO1

5Q1

µF

4.7 kΩ

e.g. Sensor

Supply

e.g. Sensor

Reset

(to µC)

INH18

µC

INH29

Ignition

Bat

100 nF

6, 12

100 nF

10D1

TLE 4473 GV55

Data Sheet 5 Rev. 1.2, 2004-01-01

Application Information

The output voltage is divided by a voltage divider and compared to an internal reference

voltage. A regulation loop controls the Q2 output in order to achieve a stable output

voltage at the Q2 pin. A second regulation loop controls the Q1 output. The reference

voltage for the Q1 is the regulated Q2 potential (tracking regulator).

Figure 2 includes the components needed for a typical application. Maintaining the

stability of the regulation loops requires a capacitor of 10

µF both outputs. A maximum

ESR of 5

Ω is permissible for the Q2 output, while the Q1 output requires a capacitor with

a maximum ESR of 3

Ω. For both output blocking capacitors it is recommended to use

tantalum types in order to stay in the permissible ESR range over the full operating

temperature range.

At the input of the regulator a capacitor is necessary for compensating line influences. A

minimum of 100 nF (ceramic capacitor) is recommended. In addition for compensation

of long input lines of several meters an electrolytic input capacitor of 47

µF … 220 µF

should be placed at the input.

Figure 3 Pin Configuration (top view)

AEP03318.VSD

1WI

RO1

RO2

4Q2

N.C.

INH2

INH1

GND

TLE 4473

(P-DSO-12-6)

Pin 6 and heat slug should be connected to GND

Data Sheet 6 Rev. 1.2, 2004-01-01

TLE 4473 GV55

Table 1 Pin Definitions and Functions

Pin No. Symbol Function

1WIWatchdog input; input for watchdog pulses, positive edge

triggered

2RO1Reset and watchdog output for Q1; open collector output

3RO2Reset output 2; open collector output

4Q2Stand-by regulator output voltage; block to GND with a

capacitor C

≥ 10 µF, ESR < 5 Ω at 10 kHz

5Q1Main regulator output voltage; output voltage tracked to Q2

voltage; block to GND with a capacitor

≥ 10 µF, ESR < 3 Ω

at 10 kHz

6N.C.Not connected; connect to GND

7I Input voltage; block to ground directly at the IC with a ceramic

capacitor

8 INH1

Inhibit input 1; low level disables Q1, integrated pull-down

resistor

9 INH2

Inhibit input 2; low level at INH2 and INH1 disables Q2 and Q1,

integrated pull-down resistor

10 D1 Reset Delay 1; connect to ground via a capacitor to set reset

delay for Q1

11 D2 Reset Delay 2; connect to ground via a capacitor to set reset

delay and watchdog timing for Q2

12 GND Ground

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

TLE4473GV55AUMA1

Mfr. #:

Buy TLE4473GV55AUMA1

Manufacturer:

Infineon Technologies

Description:

LDO Voltage Regulators LINEAR VOLTAGE REGULATOR

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TLE4473GV55AUMA1