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參數(shù)資料
| 型號： | SI91844DT-36-T1 |
| 廠商： | Vishay Intertechnology,Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 150-mA Low-Noise LDO Regulator With Error Flag and Discharge Option |
| 中文描述： | 150 - mA的低噪音LDO調(diào)節(jié)器錯誤國旗和放電期權(quán) |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 90K |
| 代理商： | SI91844DT-36-T1 |
Si91842/4
Vishay Siliconix
New Product
Document Number: 71732
S-20478—Rev. C, 01-Apr-02
www.vishay.com
1
150-mA Low-Noise LDO Regulator
With Error Flag and Discharge Option
FEATURES
Ultra Low Dropout—130 mV at 150-mA Load
Low Noise—75 V
(rms)
(10-Hz to 100-kHz Bandwidth)
Out-of-Regulation Error Flag (power good)
Shutdown Control
110- A Ground Current at 150-mA Load
Fast Start-Up (50 S)
1.5% Guaranteed Output Voltage Accuracy (1.2 V, 2%)
300-mA Peak Output Current Capability
Uses Low ESR Ceramic Capacitors
Fast Line and Load Transient Response (
1- A Maximum Shutdown Current
Output Current Limit
Reverse Battery Protection
Built-in Short Circuit and Thermal Protection
30 s)
Si91842: Output—Auto-Discharge In Shutdown Mode
Si91844: Output—No-Discharge In Shutdown Mode
Fixed 1.2, 1.8, 2.0, 2.2, 2.5, 2.6, 2.7, 2.8, 2.85, 2.9, 3.0,
3.3, 3.5, 3.6, 5.0-V Output Voltage Options
SOT23-5 Package
APPLICATIONS
Cellular Phones, Wireless Handsets
Noise-Sensitive Electronic Systems, Laptop and
Palmtop Computers
PDAs
Pagers
Digital Cameras
MP3 Player
Wireless Modem
DESCRIPTION
The Si91842/4 is a 150-mA CMOS LDO (low dropout) voltage
regulator. It is the perfect choice for low voltage, low power
applications. An ultra low ground current and ultra fast turn-on
make this part attractive for battery operated power systems.
The Si91842/4 also offers ultra low dropout voltage to prolong
battery life in portable electronics. Systems requiring a quiet
voltage source will benefit from the Si91842/4’s low output
noise. The Si91842/4 is designed to maintain regulation while
delivering 300-mA peak current, making it ideal for systems
that have a high surge current upon turn-on.
For better transient response and regulation, an active
pull-down circuit is built into the Si91842/4 to clamp the output
voltage when it rises beyond normal regulation. The Si91842
automatically discharges the output voltage by connecting the
output to ground through a 100- n-channel MOSFET when
the device is put in shutdown mode.
The Si91842/4 features reverse battery protection to limit
reverse current flow to approximately 1- A in the event
reversed battery is applied at the input, thus preventing
damage to the IC.
TYPICAL APPLICATION CIRCUIT
3
2
Si91842/4
1
4
5
V
IN
GND
SD
V
OUT
ERROR
V
IN
SD
V
OUT
1 F
1 F
51 k
5
ERROR
SOT-23, 5-Lead
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SI91844DT-50-T1 | 150-mA Low-Noise LDO Regulator With Error Flag and Discharge Option |
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| SI91861DY | 400-mA Smart Regulator for Network Interface Card |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI91844DT-50-T1 | 制造商:Vishay Siliconix 功能描述:REG LDO LIN FIX POS 5V 0.15A 5PIN SOT-23 - Tape and Reel |
| SI91845 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:150-mA Ultra Low-Noise LDO Regulator With Error Flag and Discharge Option |
| SI91845DT-18-T1 | 制造商:Vishay Siliconix 功能描述:REG LDO LIN FIX POS 1.8V 0.3A 6PIN SOT-23 - Tape and Reel |
| SI91845DT-20-T1 | 制造商:Vishay Siliconix 功能描述:REG LDO LIN FIX POS 2V 0.3A 6PIN SOT-23 - Tape and Reel |
| SI91845DT-22-T1 | 制造商:Vishay Siliconix 功能描述:REG LDO LIN FIX POS 2.2V 0.3A 6PIN SOT-23 - Tape and Reel |
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