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参数资料
| 型号： | LP2975IMMX-3.3/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封装： | MINI, SOP-8 |
| 文件页数： | 1/20页 |
| 文件大小： | 1135K |
| 代理商： | LP2975IMMX-3.3/NOPB |
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
IN. The
57 mV detection threshold of the current sense circuitry
minimizes dropout voltage and power dissipation in the re-
sistor.
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 A in shutdown
n
Low operating current (180 A 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
10003401
*RSET values are: 208k for 12V part, 72.8k for 5V part, and 39.9k for 3.3V
part.
Connection Diagram
Surface Mount Mini SO-8 Package
10003402
Top View
For Order Numbers
See Table 1 of this Document
See NS Package Number MUA08A
March 2005
LP2975
MOSFET
LDO
Driver/Controller
2005 National Semiconductor Corporation
DS100034
www.national.com
相关PDF资料 |
PDF描述 |
|---|---|
| LP2975AIMM-12/NOPB | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| LP3470M5X-4.38/NOPB | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| LP3470IM5X-3.65/NOPB | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| LP3470M5X-3.65/NOPB | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| LP3470M5-3.65/NOPB | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LP2975IMMX-5.0 | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LP2975IMMX-5.0/NOPB | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体: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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