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參數資料
| 型號： | LP3881 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 0.8A Fast-Response Ultra Low Dropout Linear |
| 中文描述： | 0.8A快速反應超低壓差線性 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 318K |
| 代理商： | LP3881 |
LP3881
0.8A Fast-Response Ultra Low Dropout Linear
Regulators
General Description
The LP3881 is a high current, fast response regulator which
can maintain output voltage regulation with minimum input to
output voltage drop. Fabricated on a CMOS process, the
device operates from two input voltages: Vbias provides
voltage to drive the gate of the N-MOS power transistor,
while Vin is the input voltage which supplies power to the
load. The use of an external bias rail allows the part to
operate from ultra low Vin voltages. Unlike bipolar regula-
tors, the CMOS architecture consumes extremely low quies-
cent current at any output load current. The use of an
N-MOS power transistor results in wide bandwidth, yet mini-
mum external capacitance is required to maintain loop sta-
bility.
The fast transient response of these devices makes them
suitable for use in powering DSP, Microcontroller Core volt-
ages and Switch Mode Power Supply post regulators. The
parts are available in TO-220 and TO-263 packages.
Dropout Voltage:
75 mV (typ)
@
0.8A load current.
Ground Pin Current:
3 mA (typ) at full load.
Shutdown Current:
60 nA (typ) when S/D pin is low.
Precision Output Voltage:
1.5% room temperature accu-
racy.
Features
n
Ultra low dropout voltage (75 mV
@
0.8A typ)
n
Low ground pin current
n
Load regulation of 0.04%/A
n
60 nA typical quiescent current in shutdown
n
1.5% output accuracy (25C)
n
TO-220, TO-263 packages
n
Over temperature/over current protection
n
40C to +125C junction temperature range
Applications
n
DSP Power Supplies
n
Server Core and I/O Supplies
n
PC Add-in-Cards
n
Local Regulators in Set-Top Boxes
n
Microcontroller Power Supplies
n
High Efficiency Power Supplies
n
SMPS Post-Regulators
Typical Application Circuit
20063001
At least 4.7 μF of input and output capacitance is required for stability.
Connection Diagrams
20063002
TO-220, Top View
20063003
TO-263, Top View
August 2003
L
2003 National Semiconductor Corporation
DS200630
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LP3881ES-1.2 | 0.8A Fast-Response Ultra Low Dropout Linear |
| LP3881ES-1.5 | 0.8A Fast-Response Ultra Low Dropout Linear |
| LP3881ES-1.8 | 0.8A Fast-Response Ultra Low Dropout Linear |
| LP3881ESX-1.2 | 0.8A Fast-Response Ultra Low Dropout Linear |
| LP3881ESX-1.5 | 0.8A Fast-Response Ultra Low Dropout Linear |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LP3881EMR | 制造商:Texas Instruments 功能描述: |
| LP3881EMR-1.2 | 制造商:Texas Instruments 功能描述:IC V REG LDO 0.8A 1.2V 3881 SOP8 |
| LP3881EMR-1.2/NOPB | 功能描述:IC REG LDO 1.2V .8A 8PSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 線性 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 穩壓器拓撲結構:正，固定式 輸出電壓:3.1V 輸入電壓:最高 5.5V 電壓 - 壓降（標準）:- 穩壓器數量:1 電流 - 輸出:300mA 電流 - 限制（最小）:420mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 供應商設備封裝:TSOT-23-5 包裝:帶卷 (TR) |
| LP3881EMR-1.5 | 制造商:Texas Instruments 功能描述:IC V REG LDO 0.8A 1.5V SMD SOP8 |
| LP3881EMR-1.5/NOPB | 功能描述:IC REG LDO 1.5V .8A 8PSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 線性 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 穩壓器拓撲結構:正，固定式 輸出電壓:3.1V 輸入電壓:最高 5.5V 電壓 - 壓降（標準）:- 穩壓器數量:1 電流 - 輸出:300mA 電流 - 限制（最小）:420mA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 供應商設備封裝:TSOT-23-5 包裝:帶卷 (TR) |
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