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参数资料
| 型号： | LP2975AIMM-12/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： | 19/20页 |
| 文件大小： | 1135K |
| 代理商： | LP2975AIMM-12/NOPB |
Typical Performance Characteristics Unless otherwise specified: T
A = 25C, CIN = 1 F, ON/OFF pin
is tied to 1.5V. (Continued)
Load Regulation
Leakage Current
10003415
10003435
Controller Gain and Phase Response
10003436
Reference Designs
The LP2975 controller can be used with virtually any
P-channel MOSFET to build a wide variety of linear voltage
regulators.
Since it would be impossible to document all the different
voltage and current combinations that could be built, a num-
ber of reference designs will be presented along with perfor-
mance data for each.
THE PERFORMANCE DATA SHOWN IS ACTUAL TEST
DATA, BUT IS NOT GUARANTEED.
DESIGN #1: V
OUT =5V @ 5A
(Refer to Typical
Application Circuits)
Components
C
IN = 82 F Aluminum Electrolytic
C
OUT = 120 F Aluminum Electrolytic
C
F = 220 pF
R
SC =10m
P-FET = NDP6020P
Heatsink: (assuming V
IN
≤ 7V and T
A
≤ 60C) if protection
against a continuous short-circuit is required, a heatsink with
θ
S-A
≤ 1.5 C/W must be used. However, if continuous short-
circuit survivability is not needed, a heatsink with
θ
S-A
≤
6 C/W is adequate.
Performance Data
Dropout Voltage
Dropout voltage is defined as the minumum input-to-output
differential voltage required by the regulator to keep the
output in regulation. It is measured by reducing V
IN until the
output voltage drops below the nominal value (the nominal
value is the output voltage measured with V
IN = 5.5V). IL =
5A for this test.
DROPOUT VOLTAGE = 323 mV
LP2975
www.national.com
8
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| LP2975AIMM-3.3 | 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 |
| LP2975AIMM-3.3/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 |
| LP2975AIMM-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 |
| LP2975AIMM-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 |
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