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參數(shù)資料
| 型號(hào)： | LP38842 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1.5A Ultra Low Dropout Linear Regulators Stable with Ceramic Output Capacitors |
| 中文描述： | 1.5A的超低壓差線性穩(wěn)壓器采用陶瓷輸出電容器穩(wěn)定 |
| 文件頁(yè)數(shù)： | 1/11頁(yè) |
| 文件大?。?/td> | 626K |
| 代理商： | LP38842 |
LP38842
1.5A Ultra Low Dropout Linear Regulators
Stable with Ceramic Output Capacitors
General Description
The LP38842 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:
115 mV (typ)
@
1.5A load current.
Quiescent Current:
30 mA (typ) at full load.
Shutdown Current:
30 nA (typ) when S/D pin is low.
Precision Output Voltage:
1.5% room temperature accu-
racy.
Features
n
Ideal for conversion from 1.8V or 1.5V inputs
n
Designed for use with low ESR ceramic capacitors
n
0.8V, 1.2V and 1.5V standard voltages available
n
Ultra low dropout voltage (115mV
@
1.5A typ)
n
1.5% initial output accuracy
n
Load regulation of 0.1%/A (typical)
n
30nA quiescent current in shutdown (typical)
n
Low ground pin current at all loads
n
Over temperature/over current protection
n
Available in 5 lead TO220 and TO263 packages
n
40C to +125C junction temperature range
Applications
n
ASIC Power Supplies In:
- Desktops, Notebooks, and Graphics Cards, Servers
- Gaming Set Top Boxes, Printers and Copiers
n
Server Core and I/O Supplies
n
DSP and FPGA Power Supplies
n
SMPS Post-Regulator
Typical Application Circuit
20103001
* Minimum value required if Tantalum capacitor is used (see Application Hints).
December 2004
L
S
2004 National Semiconductor Corporation
DS201030
www.national.com
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP38842-ADJ | 1.5A Ultra Low Dropout Adjustable Linear Regulators Stable with Ceramic Output Capacitors |
| LP3891 | 0.8A Fast-Response Ultra Low Dropout Linear |
| LP3891ES-1.2 | 0.8A Fast-Response Ultra Low Dropout Linear |
| LP3891ET-1.8 | 0.8A Fast-Response Ultra Low Dropout Linear |
| LP3891ET-1.5 | 0.8A Fast-Response Ultra Low Dropout Linear |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP38842-ADJ | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.5A Ultra Low Dropout Adjustable Linear Regulators Stable with Ceramic Output Capacitors |
| LP38842EVAL | 功能描述:電源管理IC開發(fā)工具 LP38842 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LP38842MR-ADJ | 功能描述:低壓差穩(wěn)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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP38842MR-ADJ/NOPB | 功能描述:低壓差穩(wěn)壓器 - LDO 0.8A Dual-Rail Sub-Bandgap 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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP38842MRX-ADJ | 功能描述:低壓差穩(wěn)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(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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