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PDF L4941 Data sheet ( Hoja de datos )
| Número de pieza | L4941 | |
| Descripción | VERY LOW DROP 1A REGULATOR | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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L4941
Very low drop 1A regulator
Feature summary
■ Low dropout voltage (450mV typ. at 1A)
■ Very low quiescent current
■ Thermal shutdown
■ Short circuit protection
■ Reverse polarity protection
Description
The L4941 is a three terminal 5V positive
regulators available in TO-220 and DPAK
packages, making it useful in a wide range of
industrial and consumer applications. Thanks to
its very low input/output voltage drop, these
devices are particularly suitable for battery
powered equipments, reducing consumption and
TO-220
DPAK
prolonging battery life. It employs internal current
limiting, antisaturation circuit, thermal shut-down
and safe area protection.
Order code
Part number
L4941BV
L4941BDT-TR
September 2006
Rev. 5
Package
TO-220
DPAK
1/17
www.st.com
17
1 page  
L4941
3 Maximum ratings
Maximum ratings
Table 1. Absolute maximum ratings
Symbol
Parameter
VI Forward input voltage
VIR Reverse input voltage (RO=100Ω)
IO Output current
PD Power dissipation
Tstg Storage temperature range
Top Operating junction temperature range
Value
30
-15
Internally Limited
Internally Limited
-40 to +150
-40 to +150
Unit
V
V
mA
mW
°C
°C
Note:
Absolute Maximum Ratings are those values beyond which damage to the device may
occur. Functional operation under these condition is not implied
Table 2. Thermal Data
Symbol
Parameter
RthJC
RthJA
Thermal resistance junction-case
Thermal resistance junction-ambient
TO-220
3
50
DPAK
8
100
Unit
°C/W
°C/W
5/17
5 Page 
L4941
7
Schematic application
Schematic application
Figure 21. Distributed supply with On-card L4940 and L4941 low drop regulator
Figure 22. Distributed Supply with On-card L4940 and L4941 low drop regulator
ADVANTAGES OF THESE APPLICATION ARE:
On card regulation with short-circuit and thermal protection on each output.
Vary high total system efficiency due to the switching preregulation and very low-drop postregulation.
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11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet L4941.PDF ] | |
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