L4957D2.5 Datasheet PDF - STMicroelectronics
| Part Number | L4957D2.5 | |
| Description | UP TO 4A ULDO LINEAR REGULATOR | |
| Manufacturers | STMicroelectronics | |
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® L4957
UP TO 4A ULDO LINEAR REGULATOR
1.5V AND 2.5V FIXED OUTPUT VOLTAGE
3V TO 6.5V INPUT VOLTAGE RANGE
200mΩ Rdson TYPICAL @ Tj = 125°C
0.6V max. DROP-OUT AT 2A
EXCELLENT LOAD REGULATION
0.6mA QUIESCENT CURRENT AT ANY LOAD
SHORT CIRCUIT PROTECTION WITH FOLD-
BACK
THERMAL SHUTDOWN
APPLICATIONS
MOTHER BOARDS
PROCESSOR I/O & SUPPLIES
LOW VOLTAGE MEMORY & CHIP SET SUP-
PLIES
GRAPHIC & SOUND CARDS
LOW VOLTAGE LOGIC SUPPLIES
POST REGULATOR FOR SMPS
DESCRIPTION
The L4957 devices are Ultra Low Drop Output lin-
ear regulators with an internal N-channel MOS of
200mΩ particulary suitable for low voltage/low
dropout applications.
Operating with a input voltage from 3V to 6.5V
they are capable to deliver up to 4A at 1.5V or
2.5V fixed output voltages.
MULTIPOWER BCD TECHNOLOGY
3
1
Versawatt TO-220
D2PAK
ORDERING NUMBERS:
L4957V1.5
L4957V2.5
L4957D1.5
L4957D2.5
The devices are ideal for use as one of the sup-
plies required by processor, for example they are
the cost effective and efficient solution for conver-
sion from 3.3V (rail bus) to 2.5V @ 2.5A or to
1.5V with high current rating.
Fast response transient minimise the output ca-
pacitor value. A minimum of 22µF assures the
stability in all load conditions.
The on-chip trimming technique offers a tighter
voltage reference tolerance (with ± 2% including
line and load variation) beside to ensure a con-
trolled short circuit current. Thermal shutdown
provides protection against overload conditions
that creates excessive junction temperature.
TYPICAL APPLICATION
3V to 6.5V
IN
1
L4957
OUT
3
VOUT=1.5V/2.5V
C1
2
GND
C2
D97IN657E
February 2000
1/7
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DIM.
mm
inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.40
4.60 0.173
0.181
C 1.23
1.32 0.048
0.051
D 2.40
2.72 0.094
0.107
E 0.49
0.70 0.019
0.027
F 0.61
0.88 0.024
0.034
F1 1.14
1.70 0.044
0.067
F2 1.14
1.70 0.044
0.067
G 4.95
5.15 0.194
0.203
G1 2.40
2.70 0.094
0.106
H2 10.0
10.4 0.393
0.409
L2 16.4
0.645
L4 13.0
14.0 0.511
0.551
L5 2.65
2.95 0.104
0.116
L6 15.25
15.75 0.600
0.620
L7 6.20
6.60 0.244
0.260
L9 3.50
3.93 0.137
0.154
M 2.6
0.102
Dia 3.75
3.85 0.147
0.151
L4957
OUTLINE AND
MECHANICAL DATA
Versawatt (TO220)
TO220MEC
5/7
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for L4957D2.5 electronic component. |
| Information | Total 7 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ L4957D2.5.PDF Datasheet ] | |
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