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PDF TLE4258 Data sheet ( Hoja de datos )
| Número de pieza | TLE4258 | |
| Descripción | 5-V Low-Drop Voltage Regulator | |
| Fabricantes | Siemens | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TLE4258 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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5-V Low-Drop Voltage Regulator
Preliminary Data
Features
q Low-drop voltage
q Low quiescent current
q Reset output
q Protection against reverse polarity
q Overvoltage protection 70 V
q Short-circuit proof
q Suited for automotive electronics
q Inhibit input
q Wide temperature range
TLE 4258
Bipolar IC
P-TO220-7-1
Type
TLE 4258
Ordering Code
Q67000-A8238
Package
P-TO220-7-1
The TLE 4258 is a very low drop voltage regulator which provides two regulated 5-V output
voltages. The main regulator can be loaded with 750 mA and is turned on and off by pin 5 (pin
5 unconnected = main regulator off). In addition, the main regulator incorporates a short-circuit
current limitation and is turned off in case of overvoltage (VI > VI OFF). The standby regulator
can be loaded with 35 mA, it does not incorporate a short-circuit current limitation and remains
permanently active at positive input voltage independent of the turn-off functions of the main
regulator.
If the main regulator output voltage is less than 4.5 V, the reset output is switched to low without
delay. As soon as the reset threshold has been exceeded, a delay time to be set by an external
capacitor expires and afterwards the reset output switches to high again.
If the lines to the controller are long, the oscillating circuit of line inductance and input
capacitance C I can be attenuated by a resistor ≤ 1 Ω connected in series to C I.
Circuit Description
The TLE 4258 incorporates a main and standby-control regulator: The amplifiers regulate the
output voltage by comparing the output voltage (from the voltage divider) with a highly precise
reference voltage. The standby regulator directly controls the base of a PNP series transistor
and the main regulator via a buffer that can be turned off with inhibit pulse at pin 5. If the output
voltage VQ at pin 7 drops below 4.5 V, a reset signal is released which can only be disabled
after a delay time to be set at pin 6. The main output is current-limited and remains active up
to the input voltage VI OFF.
Semiconductor Group
1
09.94
1 page  
TLE 4258
Characteristics
VI = 13.5 V; Tj = 25 ˚C; V5 > 3.5 V (unless otherwise specified)
Parameter
Symbol Limit Values Unit Test Condition
min. typ. max.
Main Regulator
Output voltage
VQ 4.85 –
Input current
Current consumption
without load
IQ
IQ
IQ
IQ
––
––
––
––
Turn-OFF voltage
Output current
Short-circuit current
Drop voltage
Static load
regulation
Dynamic load
regulation
Supply voltage-
rejection
VI OFF
25
IQ –
I SC 0.75
VDr –
VDr –
∆VQ/∆I Q –
–
–
1
0.3
0.5
–
∆VQ – –
α SVR 60 –
Reverse output current – I QR
Temperature drift
of output voltage
α VQ
–5
– 0.5 –
5.15 V
30 mA
0 mA ≤ I Q ≤ 750 mA
6 V < VI < VI off
– 40 ˚C ≤ T j ≤ 125 ˚C
I Q = 0 mA; I ST = 0 mA
150
300
300
–
20
1.8
0.5
0.75
0.2
150
–
30
0.5
mA I Q = 450 mA; I ST = 0 mA
mA I Q = 750 mA; I ST = 0 mA
mA VI = 5.8 V; I Q = 750 mA;
I ST = 0 mA
V VI > VI off
mA VI > VI off
A VQ = 0 V; 6 V ≤ VI < 13.5 V
V VI = 4.5 V; I Q = 450 mA
V VI = 4.5 V; I Q = 750 mA
Ω 6 V ≤ VI ≤ 16 V
0 mA ≤ – I Q ≤ 750 mA
mV I Q = 75 mA of I Q = 750 mA
C Q ≥ 50 µF
dB IQ = 750 mA; VI = 12 V +1 V
cos (2 π × 120 Hz × t);
α SVR = 20 log (1 V/∆VQ)
mA VI = 0; 0 V ≤ VQ ≤ 4.85 V
mV/K 6 V ≤ VI ≤ VI off
∆Tj > 50 K
Reset Generator
Switching threshold
Switching voltage
Reverse current
Change current
Reset delay time
VRT 4.4 4.5 4.6 V –
VR
0.8 V
VQ < VRT; I R = 10 mA
VR
4.4 –
VQ V
VQ > VRT
I R – – 5 µA VR > 4.6 V;
Ich
10 –
30 µA 0.5 V < VCd < (0.75 × VQ)
t D/CD –
175 –
ms/µF –
Semiconductor Group
5
5 Page 
Output Voltage versus
Temperature
TLE 4258
Short-Circuit Current versus
Input Voltage
TC = 25 ˚C
Semiconductor Group
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet TLE4258.PDF ] | |
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