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PDF ILE4270G Data sheet ( Hoja de datos )
| Número de pieza | ILE4270G | |
| Descripción | 5-V Low-Drop Fixed Voltage Regulator | |
| Fabricantes | IK Semiconductor | |
| Logotipo |  |
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TECHNICAL DATA
5-V Low-Drop Fixed Voltage Regulator
ILE4270G
Functional Description
This device is a 5-V low-drop fixed-voltage regulator.
input voltage of 26 V and for an output current up to 550 mA it
regulates the output voltage within a 2 % accuracy. The short
circuit protection limits the output current of more than 650 mA.
The device incorporates over voltage protection and
temperature protection that disables the circuit at
unpermissibly high temperatures.
ILE4270GD2
ILE4270GKB
Features
• Output voltage tolerance 2 %
• Low-drop voltage
• Integrated overtemperature protection
• Reverse polarity protection
• Input voltage up to 42 V
• Overvoltage protection up to 65 V (400 ms)
• Short-circuit proof
• Suitable for use in automotive electronics
• Wide temperature range
• Adjustable reset time
ILE 4270GD2 P-ТО263-5-1
ILE 4270GKB P-TO220-5-12
TA = -40 ÷ 125 C for all
packages.
Application Description
The IC regulates an input voltage in the range of 5.5 V VI 36 V to VQnom = 5.0 V. Up
to 26 V it produces a regulated output current of more than 550 mA. Above 26 V the save-
operating-area protection allows operation up to 36 V with a regulated output current of
more than 300 mA. Overvoltage protection limits operation at 42 V. The overvoltage
protection hysteresis restores operation if the input voltage has dropped below 36 V. A
reset signal is generated for an output voltage of VQ 4.5 V. The delay for power-on reset
can be set externally with a capacitor.
Design Notes for External Components
An input capacitor CI is necessary for compensation of line influences. The resonant
circuit consisting of lead inductance and input capacitance can be damped by a resistor of
approx. 1 in series with CI. An output capacitor CQ is necessary for the stability of the
regulating circuit. Stability is guaranteed at values of CQ 22 F and an ESR of 3 .
January, 2011, Rev. 01
1 page  
ILE4270G
Characteristics
VI = 13.5 V; – 40 C Tj = 125 C (unless otherwise specified)
Parameter
Output voltage
Symbol
Limit Values
min. typ. max.
VQ 4.90 5.00 5.10
Output voltage
VQ 4.90 5.00 5.10
Output current
limiting
Current
consumption
Iq = II IQ
Current
consumption
Iq = II – IQ
Current
consumption
Iq = II – IQ
Drop voltage
IQmax 650 850
Iq – 1
–
1.5
Iq – 55 75
Iq – 70 90
Vdr – 350 700
Unit
V
V
mA
mA
mA
mA
mV
Test Condition
5 mA IQ 550 mA;
6 V VI 26 V
26 V VI 36 V;
IQ 300 mA
VQ = 0 V
IQ = 5 mA
IQ = 550 mA
IQ = 550 mA; VI = 5 V
IQ = 550 mA1)
1) Drop voltage = VI – VQ (measured when the output voltage has dropped 100 mV from the nominal value
obtained at 13.5 V input)
Characteristics (cont’d)
VI = 13.5 V; – 40 C Tj = 125 C (unless otherwise specified)
Parameter
Load regulation
Symbol
Limit Values
min. typ. max.
VQ – 25 50
Supply voltage
regulation
Power supply
Ripple rejection
Reset Generator
Switching threshold
Reset High voltage
Reset low voltage
VQ – 12 25
PSRR
–
54
–
VRT 4.5 4.65 4.8
VROH 4.5 –
–
VROL – 60 –
Reset low voltage
Reset pull-up
VROL –
200 400
R
18 30
46
Lower reset timing
VDRL 0.2 0.45 0.8
threshold
Charge current
Id 8 14 25
Upper timing
VDU
1.4 1.8
2.3
threshold
Delay time
Reset reaction time
td – 13 –
tRR – –
3
Overvoltage Protection
Turn-Off voltage
VI, ov 42 44
46
Unit
mV
mV
dB
V
V
mV
mV
k
V
A
V
ms
s
V
Test Condition
IQ = 5 to 550 mA;
VI = 6 V
VI = 6 to 26 V
IQ = 5 mA
fr = 100 Hz;
Vr = 0.5 VSS
–
–
Rintern = 30 k2);
1.0 V VQ 4.5 V
IR = 3 mA, VQ = 4.4 V
internally connected
to Q
VQ VRT
VD = 1.0 V
–
CD = 100 nF
CD = 100 nF
–
1) Drop voltage = VI – VQ (measured when the output voltage has dropped 100 mV from the nominal value
obtained at 13.5 V input)
2) Reset peak is always lower than 1.0 V.
January, 2011, Rev. 01
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ILE4270G.PDF ] | |
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