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參數資料
| 型號： | L4957A |
| 廠商： | 意法半導體 |
| 英文描述： | UP TO 5A ULDO LINEAR REGULATOR |
| 中文描述： | 高達5A ULDO線性穩壓器 |
| 文件頁數： | 1/7頁 |
| 文件大小： | 63K |
| 代理商： | L4957A |
L4957A
UP TO 5A ULDO LINEAR REGULATOR
PRODUCT PREVIEW
1.5V, 1.8V, 2.5V AND 3.3V FIXED OUTPUT
VOLTAGE
3V TO 14V INPUT VOLTAGERANGE
200m
Rdson TYPICAL @T
j
= 125
°
C
0.6V max. DROP-OUT AT 2A
EXCELLENTLOAD REGULATION
0.6mAQUIESCENTCURRENT AT ANYLOAD
SHORT CIRCUITPROTECTION
THERMAL SHUTDOWN
APPLICATIONS
MOTHER BOARDS
PROCESSOR I/O& SUPPLIES
LOW VOLTAGE MEMORY & CHIP SET SUP-
PLIES
GRAPHIC & SOUND CARDS
LOW VOLTAGELOGIC SUPPLIES
POST REGULATORFOR SMPS
DESCRIPTION
The L4957A devices are
U
ltra
L
ow
D
rop
O
utput
linear 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 14V
they are capableto deliverup to 5A.
The devices are ideal for use as one of the sup-
plies required by processor, for example they are
the cost effectiveand efficient solution for conver-
sion from 3.3V (rail bus) to 2.5V @ 2.5A or to
1.5Vwith 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.
This is preliminary information on a new product now in development. Details are subject tochange without notice.
May 2000
L4957A
GND
OUT
IN
3
2
1
C1
3V to 14V
C2
V
OUT
D00IN1107A
TYPICAL APPLICATION
ORDERING NUMBERS:
L4957AV1.5
L4957AV1.8
L4957AV2.5
L4957AV3.3
L4957AD1.5
L4957AD1.8
L4957AD2.5
L4957AD3.3
MULTIPOWER BCD TECHNOLOGY
1
3
D
2
PAK
Versawatt TO-220
1/7
相關PDF資料 |
PDF描述 |
|---|---|
| L4957AV2.5 | UP TO 5A ULDO LINEAR REGULATOR |
| L4957AV1.5 | UP TO 5A ULDO LINEAR REGULATOR |
| L4957AV1.8 | UP TO 5A ULDO LINEAR REGULATOR |
| L4957AD1.5 | UP TO 5A ULDO LINEAR REGULATOR |
| L4957AD1.8 | UP TO 5A ULDO LINEAR REGULATOR |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| L4957AD1.8TR | 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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