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參數(shù)資料
| 型號(hào)： | Si91843DT-27-T1 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | 150-mA Ultra Low-Noise LDO Regulator With Discharge Option |
| 中文描述： | 150mA的超低噪聲LDO穩(wěn)壓器排放的選項(xiàng) |
| 文件頁(yè)數(shù)： | 1/9頁(yè) |
| 文件大小： | 121K |
| 代理商： | SI91843DT-27-T1 |
Si91841/3
Vishay Siliconix
Document Number: 71447
S-40592—Rev. C, 29-Mar-04
www.vishay.com
1
150-mA Ultra Low-Noise LDO Regulator
With Discharge Option
FEATURES
Ultra Low Dropout—130 mV at 150-mA Load
Ultra Low Noise—30 V
(rms)
(10-Hz to 100-kHz
Bandwidth)
Shutdown Control
110- A Ground Current at 150-mA Load
1.5% Guaranteed Output Voltage Accuracy
300-mA Peak Output Current Capability
Uses Low ESR Ceramic Capacitors
Fast Start-Up (50 s)
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)
Si91841: Output, Auto-Discharge In Shutdown Mode
Si91843: Output, No-Discharge In Shutdown Mode
Fixed 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
Thin 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 Si91841/3 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 makes this part
attractive for battery operated power systems. The Si91841/3
also offers ultra low dropout voltage to prolong battery life in
portable electronics. Systems requiring a quiet voltage
source, such as RF applications, will benefit from the
Si91841/3’s ultra low output noise. An external noise bypass
capacitor connected to the device’s BP pin can further reduce
the noise level. The Si91841/3 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 Si91841/3 to clamp the output
voltage when it rises beyond normal regulation. The Si91841
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 Si91841/3 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.
The Si91841/3 is available in both standard and lead (Pb)-free
packages.
TYPICAL APPLICATION CIRCUIT
3
2
Si91841/3
1
4
5
V
IN
GND
SD
V
OUT
V
IN
SD
V
OUT
1 F
1 F
BP
10 nF
Thin SOT-23, 5-Lead
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| Si91846DT-18-T1 | 150-mA Ultra Low-Noise LDO Regulator With Error Flag and Discharge Option |
| Si91845DT-18-T1 | 150-mA Ultra Low-Noise LDO Regulator With Error Flag and Discharge Option |
| Si91845DT-20-T1 | 150-mA Ultra Low-Noise LDO Regulator With Error Flag and Discharge Option |
| Si91845DT-22-T1 | 150-mA Ultra Low-Noise LDO Regulator With Error Flag and Discharge Option |
| Si91845DT-25-T1 | 150-mA Ultra Low-Noise LDO Regulator With Error Flag and Discharge Option |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SI91843DT-285-T1 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:150-mA Ultra Low-Noise LDO Regulator With Discharge Option |
| Si91843DT-28-T1 | 制造商:Vishay Siliconix 功能描述:REG LDO LIN FIX POS 2.8V 0.3A 5PIN SOT-23 - Tape and Reel |
| Si91843DT-29-T1 | 制造商:Vishay Siliconix 功能描述:REG LDO LIN FIX POS 2.9V 0.3A 5PIN SOT-23 - Tape and Reel |
| SI91843DT-30-T1 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:150-mA Ultra Low-Noise LDO Regulator With Discharge Option |
| SI91843DT-33-T1 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:150-mA Ultra Low-Noise LDO Regulator With Discharge Option |
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