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參數(shù)資料
| 型號： | MIC2940 |
| 廠商： | Micrel Semiconductor,Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 1.25A Low-Dropout Voltage Regulator Preliminary Information |
| 中文描述： | 1.25A的低壓差穩(wěn)壓器的初步信息 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 121K |
| 代理商： | MIC2940 |
MIC2940A/2941A
Micrel
June 1999
1
MIC2940A/2941A
MIC2940A/2941A
1.25A Low-Dropout Voltage Regulator
Preliminary Information
Features
High output voltage accuracy
Guaranteed 1.25A output
Low quiescent current
Low dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Current and thermal limiting
Input can withstand –20V reverse battery and +60V
positive transients
Logic-controlled electronic shutdown
Output programmable from 1.24V to 26V(MIC2941A)
Available in TO-220, TO-263, TO-220-5, and TO-263-5
packages.
Applications
Battery Powered Equipment
Cellular Telephones
Laptop, Notebook, and Palmtop Computers
PCMCIA V
and V
PP
Regulation/Switching
Bar Code Scanners
Automotive Electronics
SMPS Post-Regulator/ DC to DC Modules
Voltage Reference
High Efficiency Linear Power Supplies
General Description
The MIC2940A and MIC2941A are “bulletproof” efficient
voltage regulators with very low dropout voltage (typically
40mV at light loads and 350mV at 1A), and low quiescent
current (240
μ
A typical). The quiescent current of the MIC2940A
increases only slightly in dropout, thus prolonging battery life.
Key MIC2940A features include protection against reversed
battery, fold-back current limiting, and automotive “l(fā)oad dump”
protection (60V positive transient).
The MIC2940 is available in both fixed voltage (3.3V, 5V, and
12V) and adjustable voltage configurations. The MIC2940A-
xx devices are three pin fixed voltage regulators. A logic-
compatible shutdown input is provided on the adjustable
MIC2941A, which enables the regulator to be switched on and
off.
1
2 3 4 5
TO-220-5 Package
(MIC2941ABT)
TO-263-5 Package
(MIC2941ABU)
1
2 3 4 5
1
Front View
GROUND
2
3
TO-220 Package
(MIC2940A-xxBT)
INPUT
OUTPUT
INPUT GROUND OUTPUT
TO-263 Package
(MIC2940A-xxBU)
Pin Configuration
MIC2941A Pinout
1)
2)
3)
4)
5)
Adjust
Shutdown
Ground
Input
Output
The Tab is Ground on TO-220 and TO-263 packages
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC2940A-3.3BU | 1.25A Low-Dropout Voltage Regulator Preliminary Information |
| MIC2941ABT | 1.25A Low-Dropout Voltage Regulator Preliminary Information |
| MIC2941ABU | 1.25A Low-Dropout Voltage Regulator Preliminary Information |
| MIC2940A-5.0BT | 1.25A Low-Dropout Voltage Regulator Preliminary Information |
| MIC2940A-5.0BU | 1.25A Low-Dropout Voltage Regulator Preliminary Information |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2940A-12BT | 功能描述:IC REG LDO 12V 1.25A TO220-3 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.8V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.3V @ 80mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:80mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:帶卷 (TR) 其它名稱:MIC5203-3.8BM5TRMIC5203-3.8BM5TR-ND |
| MIC2940A-12BU | 功能描述:IC REG LDO 12V 1.25A TO-263 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.8V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.3V @ 80mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:80mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:帶卷 (TR) 其它名稱:MIC5203-3.8BM5TRMIC5203-3.8BM5TR-ND |
| MIC2940A-12BU TR | 功能描述:IC REG LDO 12V 1.25A TO-263 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:3.8V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.3V @ 80mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:80mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:帶卷 (TR) 其它名稱:MIC5203-3.8BM5TRMIC5203-3.8BM5TR-ND |
| MIC2940A-12WT | 功能描述:低壓差穩(wěn)壓器 - LDO 1.25A LDO Fixed Volt.(ROHS Compliant) 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(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MIC2940A-12WU | 功能描述:低壓差穩(wěn)壓器 - LDO 1.25A LDO Fixed Volt.(ROHS Compliant) 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(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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