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參數資料
| 型號： | LP3964 |
| 文件頁數： | 1/22頁 |
| 文件大小： | 479K |
| 代理商： | LP3964 |
LP3961/LP3964
800mA Fast Ultra Low Dropout Linear Regulators
General Description
The LP3961/LP3964 series of fast ultra low-dropout linear
regulators operate from a +2.5V to +7.0V input supply. Wide
range of preset output voltage options are available. These
ultra low dropout linear regulators respond very fast to step
changes in load which makes them suitable for low voltage
microprocessor applications. The LP3961/LP3964 are de-
veloped on a CMOS process which allows low quiescent
current operation independent of output load current. This
CMOS process also allows the LP3961/LP3964 to operate
under extremely low dropout conditions.
Dropout Voltage:
Ultra low dropout voltage; typically 24mV
at 80mA load current and 240mV at 800mA load current.
Ground Pin Current:
Typically 4mA at 800mA load current.
Shutdown Mode:
Typically 15μA quiescent current when
the shutdown pin is pulled low.
Error Flag:
Error flag goes low when the output voltage
drops 10% below nominal value (for LP3961).
SENSE:
Sense pin improves regulation at remote loads.
(For LP3964)
Precision Output Voltage:
Multiple output voltage options
are available ranging from 1.2V to 5.0V and adjustable
(LP3964), with a guaranteed accuracy of
±
1.5% at room
temperature, and
±
3.0% over all conditions (varying line,
load, and temperature).
Features
n
Ultra low dropout voltage
n
Low ground pin current
n
Load regulation of 0.02%
n
15μA quiescent current in shutdown mode
n
Guaranteed output current of 0.8A DC
n
Available in SOT-223,TO-263 and TO-220 packages
n
Output voltage accuracy
±
1.5%
n
Error flag indicates output status (LP3961)
n
Sense option improves better load regulation (LP3964)
n
Extremely low output capacitor requirements
n
Overtemperature/overcurrent protection
n
40C to +125C junction temperature range
Applications
n
Microprocessor power supplies
n
GTL, GTL+, BTL, and SSTL bus terminators
n
Power supplies for DSPs
n
SCSI terminator
n
Post regulators
n
High efficiency linear regulators
n
Battery chargers
n
Other battery powered applications
Typical Application Circuits
10112901
*
SD and ERROR pins must be pulled high through a 10k
pull-up resistor. Connect the ERROR pin to ground if this function is not used. See applications
section for more information.
**
See Application Hints.
November 2001
L
2001 National Semiconductor Corporation
DS101129
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LP3964EMP-1.8 | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| LP3964EMP-3.3 | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| LP3964EMP-ADJ | Positive Adjustable Voltage Regulator |
| LP3964EMPX-1.8 | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| LP3964EMPX-2.5 | THREE-TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LP3964EMP-1.8 | 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 |
| LP3964EMP-1.8 | 制造商:Texas Instruments 功能描述:V REG ULTRA-LDO +1.8V SMD 3964 |
| LP3964EMP-1.8/NOPB | 功能描述:低壓差穩壓器 - LDO 800Ma Ultra-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 |
| LP3964EMP-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 |
| LP3964EMP-2.5 | 制造商:Texas Instruments 功能描述:V REG ULTRA-LDO +2.5V SMD 3964 |
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