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參數資料
| 型號： | LP3981ILD-3.3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Micropower, 300mA Ultra Low-Dropout CMOS Voltage |
| 中文描述： | 3.3 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, DSO6 |
| 封裝： | LLP-6 |
| 文件頁數： | 1/11頁 |
| 文件大小： | 341K |
| 代理商： | LP3981ILD-3.3 |
LP3981
Micropower, 300mA Ultra Low-Dropout CMOS Voltage
Regulator
General Description
The LP3981’s performance is optimized for battery powered
systems to deliver ultra low noise, extremely low dropout
voltage and low quiescent current. Regulator ground current
increases only slightly in dropout, further prolonging the
battery life.
Power supply rejection is better than 60 dB at low frequen-
cies. This high power supply rejection is maintained down to
lower input voltage levels common to battery operated cir-
cuits.
The device is ideal for mobile phone and similar battery
powered wireless applications. It provides up to 300 mA,
from a 2.5V to 6V input, consuming less than 1μA in disable
mode.
The LP3981 is available in MSOP-8 package. For LP3981 in
LLP-6 package, contact NSC sales offices. Performance is
specified for 40C to +125C temperature range. The de-
vice available in the following output voltages; 2.5V, 2.7V,
2.8V, 2.83V, 3.0V, 3.03V and 3.3V as standard. Other output
options can be made available, please contact your local
NSC sales office.
Key Specifications
n
2.5 to 6.0V input range
n
300mA guaranteed output
n
60dB PSRR at 1kHz
n
≤
1μA quiescent current when shut down
n
Fast Turn-On time: 120 μs (typ.) with C
BYPASS
= 0.01uF
n
132mV typ dropout with 300mA load
n
35μVrms output noise over 10Hz to 100kHz
n
40 to +125C junction temperature range for operation
n
2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V, and 3.3V outputs
standard
Features
n
Small, space saving MSOP-8
n
Low Thermal Resistance in LLP-6 package gives
excellent power capability
n
Logic controlled enable
n
Stable with ceramic and high quality tantalum capacitors
n
Fast turn-on
n
Thermal shutdown and short-circuit current limit
Applications
n
CDMA cellular handsets
n
Wideband CDMA cellular handsets
n
GSM cellular handsets
n
Portable information appliances
n
Tiny 3.3V
±
5% to 2.5V, 300mA converter
Typical Application Circuit
20020302
Note: Pin Numbers in parenthesis indicate LLP-6 package.
March 2003
L
2003 National Semiconductor Corporation
DS200203
www.national.com
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LP3981ILDX-2.5 | 功能描述:低壓差穩壓器 - 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 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP3981ILDX-2.5 NOPB | 制造商:Texas Instruments 功能描述: |
| LP3981ILDX-2.5/NOPB | 功能描述:低壓差穩壓器 - 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 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP3981ILDX-2.7 | 功能描述:低壓差穩壓器 - 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 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP3981ILDX-2.7/NOPB | 功能描述:低壓差穩壓器 - 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 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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