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參數資料
| 型號： | LP2957IS |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 5V Low-Dropout Regulator for P Applications |
| 中文描述： | 5 V FIXED POSITIVE LDO REGULATOR, 0.8 V DROPOUT, PSSO5 |
| 封裝： | PLASTIC, TO-263, 5 PIN |
| 文件頁數： | 1/14頁 |
| 文件大小： | 378K |
| 代理商： | LP2957IS |
LP2957/LP2957A
5V Low-Dropout Regulator for μP Applications
General Description
The LP2957 is a 5V micropower voltage regulator with elec-
tronic shutdown, error flag, very low quiescent current
(150 μA typical at 1 mA load), and very low dropout voltage
(470 mV typical at 250 mA load current).
Output can be wired for snap-on/snap-off operation to elimi-
nate transition voltage states where μP operation may be un-
predictable.
Output crowbar (50 mA typical pull-down current) will bring
down the output quickly when the regulator snaps off or
when the shutdown function is activated.
The part has tight line and load regulation (0.04% typical)
and low output temperature coefficient (20 ppm/C typical).
The accuracy of the 5V output is guaranteed at room tem-
perature and over the full operating temperature range.
The LP2957 is available in the five-lead TO-220 and TO-263
packages.
Features
n
5V output within 1.4% over temperature (A grade)
n
Easily programmed for snap-on/snap-off output
n
Guaranteed 250 mA output current
n
Extremely low quiescent current
n
Low Input-Output voltage required for regulation
n
Reverse battery protection
n
Extremely tight line and load regulation
n
Very low temperature coefficient
n
Current and thermal limiting
n
Error flag signals when output is out of regulation
Applications
n
High-efficiency linear regulator
n
Battery-powered regulator
Package Outline
Bent, Staggered Leads
5-Lead TO-220 (T)
DS011340-16
Top View
Order Number LP2957AIT or LP2957IT
See NS Package Number T05D
Plastic Surface Mount Package
5-Lead TO-263 (S)
DS011340-17
Top View
DS011340-18
Side View
Order Number LP2957AIS or LP2957IS
See NS Package Number TS5B
June 1998
L
1999 National Semiconductor Corporation
DS011340
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LP2957IS/NOPB | 功能描述:低壓差穩壓器 - LDO 5V Micropwr 2.4% LDO 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 |
| LP2957IS/NOPB | 制造商:Texas Instruments 功能描述:Voltage Regulator IC |
| LP2957ISX | 功能描述:低壓差穩壓器 - LDO 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 |
| LP2957ISX/NOPB | 功能描述:低壓差穩壓器 - LDO 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 |
| LP2957IT | 功能描述:IC REG LDO 5V .25A TO220-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 線性 系列:- 標準包裝:1 系列:- 穩壓器拓撲結構:正，固定式 輸出電壓:4V 輸入電壓:最高 16V 電壓 - 壓降（標準）:0.28V @ 150mA 穩壓器數量:1 電流 - 輸出:150mA 電流 - 限制（最小）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:5-VFBGA 供應商設備封裝:5-uSMD 包裝:Digi-Reel® 其它名稱:LP2985AIBP-4.0DKR |
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