Siemens TLE 4263 User Manual

现货库存、技术资料、百科信息、热点资讯，精彩尽在鼎好!

5-V Low-Drop Voltage Regulator TLE 4263

Features

● Output voltage tolerance ≤ ± 2 %

● Low-drop voltage

● Very low standby current consumption

● Overtemperature protection

● Reverse polarity protection

● Short-circuit proof

● Settable reset threshold

● Watchdog

● Wide temperature range

● Suitable for use in automotive electronics

P-DSO-20-6

Type Ordering Code Package

TLE 4263 G Q67006-A9095 P-DSO-20-6 (SMD)
TLE 4263 GM Q67006-A9357 P-DSO-14-4 (SMD)

▼

New type

▼

P-DSO-14-4

Functional Description

TLE 4263 G is a 5-V lo w-drop voltage regulator i n a P-DSO-20-6 SMD package. The
maximum input voltage is 45 V. The maximum output current is more than 200 mA. The
IC is short-circuit proof and incorporates tempe rature protection that disabl es the IC at
overtemperature.

V

The IC regulates an inp ut v oltage

in the range of 6 V < VI < 45 V to V

I

reset signal is generated for an output voltage of

V

< 4.5 V. This voltage threshold can

Q

= 5.0 V. A

Qrated

be decreased to 3.5 V by external connection . The res et de lay can be set exte rnall y by
a capacitor. The integrated watchdo g logic co ntrol s the connecte d micr ocontrol ler. The
IC can be switched off via the inhibit input, which causes the current consumption to drop
from 800 µA to < 50 µA.

Semiconductor Group 1 1998-11-01

TLE 4263

Dimensioning Information on External Components

C

The input capacitor
approx. 1 Ω in series with
capacitance can be dampe d. The output capacitor is necessary for the stability of the
regulating circuit. Stability is guaranteed at values ≥ 22 µF and an ESR of ≤ 3 Ω within
the operating temperature range. For small tole rances of the reset delay the spread of
the capacitance of the delay capacitor and its temperature coefficient should be noted.

Pin Configuration

(top view)

is necessary for compensating line influences. Using a resistor of

I

C

, the oscillating circuit consisting of input inductivity and input

I

TLE 4263 G

TLE 4263 GM

N.C.

QRES

GND
GND
GND

DRES

SRES

1
2
3
4
5
6
7

14
13
12
11
10

9
8

AEP02587

INH

V

Ι

GND
GND
GND

V

Q

W

Semiconductor Group 2 1998-11-01

TLE 4263

Pin Definitions and Functions
Pin Symbol Function

1, 2, 19, 13 N.C. Not connected
3QRESReset output; open-collector output connected to the

output via a resistor of 30 kΩ.

4-7,

GND Ground

14-17
9 DRES Reset delay; connected to ground with a capacitor.
10 SRES Reset threshold; for setting the switching threshold

connect with a voltage divider from output to ground. If this
input is connected to GND, reset is triggered at an output
voltage of 4.5 V.

11 W Watchdog; positive edge triggered input for monitoring a

microcontroller.

12

V

Q

5-V output voltage; block to ground with a 22−µF
capacitor.

18

V

I

Input voltage; block to ground directly at the IC with a
ceramic capacitor.

20 INH Inhibit; TTL-compatible, low-active input.

Semiconductor Group 3 1998-11-01

TLE 4263

Circuit Description

The control amplifie r compares a reference voltage, which i s kept highly accurate by
resistance adjustment, to a voltag e t hat is proporti onal to the o utput v oltage and d rives
the base of the series transistor via a buffer. Saturation control as a function of the load
current prevents any over-saturation of the power element. If the externally scaled down
output voltage at the reset threshold inpu t drops below 1.35 V, the external reset delay
capacitor is discharged by the reset gen erator. If the voltage on the capacito r reaches

V

the lower threshold
again until the upper threshold
to GND, reset is trigge red at an out put voltage of 4.5 V. A connected microcontrol ler is
controlled by the watchdog logic. If pulses are missing, the reset output is set to low. The
pulse sequence time can be set within a wide range with the reset delay capa cito r. The
IC can be switched at the TTL-compatible, low-active inhibit input. The IC also
incorporates a number of internal circuits for protection against:

, a reset signal i s issued on the rese t output and not canc elled

ST

V

is exceeded. If the reset threshold input is connected

dT

● Overload

● Overtemperature

● Reverse polarity

18

Input

Adjustment

Temperature

Sensor

Bandgap

Reference

Control

Amplifier

Saturation

Control and

Protection

Circuit

Buffer

11

Watchdog

Reset

Generator

12

Output

9

Reset
Delay

3

Reset
Output

10

Reset
Threshold

20

Inhibit

4-7, 14-17

GND

AEB01100

Block Diagram

Semiconductor Group 4 1998-11-01

TLE 4263

Absolute Maximum Ratings

T

= – 40 to 150 °C

j

Parameter Symbol Limit Values Unit Remarks

min. max.

Input

Input voltage
Input current

Reset Output

Voltage
Current

Reset Input

Reset threshold

Reset Delay

Voltage
Current

Output

V
I

V
I

V

V
I

I

I

R

R

RE

d

d

–42
–

– 0.3
–

– 0.3 6 V –

–0.3
–

45
–

42
–

42
–

V
–

V
–

V
–

–
internally limited

–
internally limited

–
internally limited

Voltage
Current

V
I

Q

Q

–0.3
–

7
–

V
–

–
internally limited

Inhibit

Voltage

V

e

–42 45 V –

Watchdog

Voltage

V

W

–0.3 6 V –

Ground

Current

Semiconductor Group 5 1998-11-01

I

GND

–0.5 – A –