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參數(shù)資料
| 型號： | SI91871 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Low-noise CMOS LDO regulator |
| 中文描述： | 低噪聲CMOS LDO穩(wěn)壓器 |
| 文件頁數(shù)： | 1/9頁 |
| 文件大?。?/td> | 183K |
| 代理商： | SI91871 |
Si91871
Vishay Siliconix
New Product
Document Number: 72012
S-03156—Rev. B, 03-Feb-03
www.vishay.com
1
300-mA Ultra Low-Noise LDO Regulator
With Discharge Option
FEATURES
Ultra Low Dropout—300 mV at 300-mA Load
Ultra Low Noise—30 V
RMS
(10-Hz to 100-kHz)
Shutdown Control
130- A Ground Current at 300-mA Load
1.5% Guaranteed Output Voltage Accuracy
400-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)
Output, Auto-Discharge In Shutdown Mode
Fixed 1.2, 1.5, 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
MLP33-5 PowerPAK Package
APPLICATIONS
Cellular Phones, Wireless Handsets
Noise-Sensitive Electronic Systems, Laptop and
Palmtop Computers
PDAs
Pagers
Digital Cameras
MP3 Player
Wireless Modem
DESCRIPTION
The Si91871 is a 300-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 Si91871
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
Si91871’s ultra low output noise. An external noise bypass
capacitor connected to the device’s BP pin can further reduce
the noise level. The Si91871 is designed to maintain regulation
while delivering 400-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 Si91871 to clamp the output
voltage when it rises beyond normal regulation. The Si91871
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 Si91871 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 Si91871 is available in the 5-pin MLP33 PowerPAK
package and is specified to operate over the industrial
temperature range of -40 C to 85
TYPICAL APPLICATION CIRCUIT
MLP33-5
Si91871
V
IN
GND
SD
V
OUT
V
IN
SD
V
OUT
2.2 F
BP
10 nF
2.2 F
相關PDF資料 |
PDF描述 |
|---|---|
| SI91872DMP-33-T1 | 300-mA Low-Noise LDO Regulator With Error Flag and Discharge Option |
| SI91872DMP-50-E3 | 300-mA Low-Noise LDO Regulator With Error Flag and Discharge Option |
| SI91872DMP-50-T1 | 300-mA Low-Noise LDO Regulator With Error Flag and Discharge Option |
| SI91872DMP-12-T1 | 300-mA Low-Noise LDO Regulator With Error Flag and Discharge Option |
| SI91872DMP-18-E3 | 300-mA Low-Noise LDO Regulator With Error Flag and Discharge Option |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SI91871_05 | 制造商:VISHAY 制造商全稱:Vishay Siliconix 功能描述:300-mA Ultra Low-Noise LDO Regulator With Discharge Option |
| SI91871DMP-12-E3 | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA LDO 1.2V w/Discharge Option 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(diào)節(jié):0.3 % 輸出端數(shù)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 |
| SI91871DMP-12-T1 | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA LDO 1.2V w/Discharge Option 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(diào)節(jié):0.3 % 輸出端數(shù)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 |
| SI91871DMP-15-T1 | 制造商:Vishay Siliconix 功能描述:REG LDO LIN FIX POS 1.5V 0.3A 5MLP33 - Tape and Reel |
| SI91871DMP-18-E3 | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA LDO 1.8V w/Discharge Option 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(diào)節(jié):0.3 % 輸出端數(shù)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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