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PDF ILE4278 Data sheet ( Hoja de datos )
| Número de pieza | ILE4278 | |
| Descripción | 5-V Low-Drop Fixed Voltage Regulator | |
| Fabricantes | Integral | |
| Logotipo |  |
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ILE4278
5-V Low-Drop Fixed Voltage Regulator
Functional Description
The IZE4278 (functional equivalent of TLE4278 G Infineon) is a monolithic integrated low-
drop fixed-voltage regulator 5V/150mA with low current consumption and additional
functions for automotive electronics The IZE4278 is available in chip form and suitable for
assembly in SO-20 package.
The IZE4278 provides output positive voltage 5V ± 2 % (under load current up to 150mA
and supply voltage range 6 to 28V) and 5V ± 4 % (under load current up to 50mA and
supply voltage range 28 to 45V)/ Drop voltage not exceed 0,5V under load current
100mA. The IZE4278 is steady to overvoltage of both (positive and negative) polarities,
short-circuit of output to ground., contain internal limiting circuit of load current and
thermal shutdown. It is equipped with additional functions such as reset, reset parameters
adjustment, watchdog circuit with input of activation threshold adjustment.
The IZE 4278 can be used in power supply sources of electronic devices and
particularly in automotive electronics
Features
• Precision output voltage5V ± 2%
• Very low current consumption
• Low-drop voltage
• Watchdog
• Adjustable watchdog activating threshold
• Settable reset threshold
• Overheating protection
• Reverse polarity protection
• Short-circuit proof
• Wide temperature range 40 to +125°С
• Suitable for use in automotive electronics
Block diagram.
Ver.02/06.08.2009
1 ILE4278e_ts
293376
www.bms.by
1 page  
ILE4278
Parameter, unit
Symbol
Mode1
Value
Note
Charging current, uA
Discharging current, uA
Threshold voltage of
output
to high level state, V
switching
watchdog
Id
Idis
UDU(W)
UD = 1.0 V
UD = 1.0 V
min max
28
0.6 2.0
1.5 2.3
Threshold voltage of switching watchdog
output
to low level state, V
UDWL
0.5 0.9
Watchdog output pulse period, ms
Watchdog output low level pulse duration, ms
Watchdog output high level pulse duration, ms
TWP
tWR
TWT
CD = 47 nF
UQ ≥ URT
CD = 47 nF
42 80
7 19
35 61
Notes:
1. Measurements of electric parameters have execute with connected input capacitors
CI1 = 1000 uF, CI2 = 470 nF and output capacitor CQ = 10 uF.
2 Measurements of drop-out voltage UDr = UI - UQ executed, when output voltage decreased on 100 mV
relatively received nominal value at UI = 13,5 V
Reset timing diagram (watchdog disabled)
Timing diagram on watchdog function
5
Ver.02/06.08.2009
ILE4278e_ts
293376
www.bms.by
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ILE4278.PDF ] | |
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