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參數(shù)資料
| 型號： | LP2975IMMX-3.3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | Quadruple 2-Input Exclusive-OR Gates 14-SOIC -40 to 85 |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封裝： | MINI, SOP-8 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 715K |
| 代理商： | LP2975IMMX-3.3 |
LP2975
MOSFET LDO Driver/Controller
General Description
A high-current LDO regulator is simple to design with the
LP2975 LDO Controller. Using an external P-FET, the
LP2975 will deliver an ultra low dropout regulator with ex-
tremely low quiescent current.
High open loop gain assures excellent regulation and ripple
rejection performance.
The trimmed internal bandgap reference provides precise
output voltage over the entire operating temperature range.
Dropout voltage is “user selectable” by sizing the external
FET: the minimum input-output voltage required for opera-
tion is the maximum load current multiplied by the R
DS
(ON)
of the FET.
Overcurrent protection of the external FET is easily imple-
mented by placing a sense resistor in series with V
. The
57 mV detection threshold of the current sense circuitry mini-
mizes dropout voltage and power dissipation in the resistor.
The standard product versions available provide output volt-
ages of 12V, 5V, or 3.3V with guaranteed 25C accuracy of
1.5% (“A” grade) and 2.5% (standard grade).
Features
n
Simple to use, few external components
n
Ultra-small mini SO-8 package
n
1.5% (A grade) precision output voltage
n
Low-power shutdown input
n
<
1 μA in shutdown
n
Low operating current (180 μA typical
@
V
IN
= 5V)
n
Wide supply voltage range (1.8V to 24V)
n
Built-in current limit amplifier
n
Overtemperature protection
n
12V, 5V, and 3.3V standard output voltages
n
Can be programmed using external divider
n
40C to +125C junction temperature range
Applications
n
High-current 5V to 3.3V regulator
n
Post regulator for switching converter
n
Current-limited switch
Block Diagram
Connection Diagram
DS100034-1
SET
values are: 208k for 12V part, 72.8k for 5V part, and 39.9k for 3.3V
*R
Surface Mount Mini SO-8 Package
DS100034-2
Top View
For Order Numbers
See
Table 1
of this Document
See NS Package Number MUA08A
September 1997
L
1999 National Semiconductor Corporation
DS100034
www.national.com
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PDF描述 |
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| LP2975AIMM-5.0 | MOSFET LDO Driver/Controller |
| LP2975IMM-5.0 | MOSFET LDO Driver/Controller |
| LP2975IMMX-5.0 | MOSFET LDO Driver/Controller |
| LP2975AIMM-12 | MOSFET LDO Driver/Controller |
| LP2975IMM-12 | MOSFET LDO Driver/Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP2975IMMX-5.0 | 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 |
| LP2975IMMX-5.0/NOPB | 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 |
| LP2978AY-3.8 WAF | 制造商:Texas Instruments 功能描述: |
| LP2978IM5-3.8 | 制造商:Rochester Electronics LLC 功能描述:50MA LDO REGULATOR, LOW-NOISE - Bulk 制造商:Texas Instruments 功能描述: |
| LP2978IM5X-3.8 | 制造商:Rochester Electronics LLC 功能描述:50MA LDO REGULATOR, LOW-NOISE - Bulk 制造商:Texas Instruments 功能描述: |
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