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參數資料
| 型號： | L4957 |
| 廠商： | 意法半導體 |
| 英文描述： | UP TO 4A ULDO LINEAR REGULATOR |
| 中文描述： | 高達4A ULDO線性穩壓器 |
| 文件頁數： | 1/7頁 |
| 文件大小： | 63K |
| 代理商： | L4957 |
L4957
UP TO 4A ULDO LINEAR REGULATOR
1.5V AND 2.5VFIXED OUTPUT VOLTAGE
3V TO 6.5V INPUT VOLTAGERANGE
200m
Rdson TYPICAL @ T
j
= 125
°
C
0.6V max. DROP-OUT AT 2A
EXCELLENTLOAD REGULATION
0.6mAQUIESCENT CURRENT AT ANYLOAD
SHORT CIRCUIT PROTECTION WITH FOLD-
BACK
THERMALSHUTDOWN
APPLICATIONS
MOTHER BOARDS
PROCESSORI/O & SUPPLIES
LOW VOLTAGE MEMORY & CHIP SET SUP-
PLIES
GRAPHIC & SOUND CARDS
LOW VOLTAGELOGIC SUPPLIES
POSTREGULATOR FOR SMPS
DESCRIPTION
The L4957 devices are
U
ltra
L
ow
D
rop
O
utput lin-
ear regulators with an internal N-channel MOS of
200m
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.
The devices are ideal for use as one of the sup-
plies required by processor, for example they are
the cost effectiveand efficient solutionfor 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 22
μ
F assures the
stabilityin 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 excessivejunction temperature.
February 2000
L4957
GND
OUT
IN
3
2
1
C1
3V to 6.5V
C2
V
OUT
=1.5V/2.5V
D97IN657E
TYPICALAPPLICATION
ORDERING NUMBERS:
L4957V1.5
L4957V2.5
L4957D1.5
L4957D2.5
MULTIPOWER BCD TECHNOLOGY
1
3
D
2
PAK
Versawatt TO-220
1/7
相關PDF資料 |
PDF描述 |
|---|---|
| L4957V25 | UP TO 4A ULDO LINEAR REGULATOR |
| L4957V2.5 | UP TO 4A ULDO LINEAR REGULATOR |
| L4957V1.5 | UP TO 4A ULDO LINEAR REGULATOR |
| L4957V15 | UP TO 4A ULDO LINEAR REGULATOR |
| L4962A | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
相關代理商/技術參數 |
參數描述 |
|---|---|
| L4957A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Up to 5A ULDO linear regulator |
| L4957A_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Up to 5A ULDO linear regulator |
| L4957AD1.5 | 功能描述:低壓差穩壓器 - LDO 1.5V 5.0A Linear RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| L4957AD1.5TR | 功能描述:低壓差穩壓器 - LDO 1.5V 5.0A Linear RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| L4957AD1.8 | 功能描述:低壓差穩壓器 - LDO 1.8V 5.0A Linear RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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