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參數(shù)資料
| 型號(hào)： | MIC49500WU |
| 廠(chǎng)商： | MICREL INC |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 5A Dual Supply, Low Voltage, High Bandwidth LDO |
| 中文描述： | 0.9 V-1.8 V ADJUSTABLE POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PSSO7 |
| 封裝： | ROHS COMPLIANT, TO-263, 7 PIN |
| 文件頁(yè)數(shù)： | 9/11頁(yè) |
| 文件大?。?/td> | 233K |
| 代理商： | MIC49500WU |
Micrel, Inc.
MIC49500
The heat sink may be significantly reduced in
applications where the maximum input voltage is
known and large compared with the dropout voltage.
Use a series input resistor to drop excessive voltage
and distribute the heat between this resistor and the
regulator. The low dropout properties of the MIC49500
allow significant reductions in regulator power
dissipation and the associated heat sink without
compromising performance. When this technique is
employed, a capacitor of at least 1μF is needed
directly between the input and regulator ground. Refer
to Application Note 9 for further details and examples
on thermal design and heat sink specification.
November 2005
9
M9999-110805
(408) 955-1690
Minimum Load Current
The MIC49500, unlike most other high current
regulators, does not require a minimum load to
maintain output voltage regulation.
Power Sequencing
There is no power sequencing requirement for V
IN
and
V
BIAS
, giving more flexibility to the user.
Adjustable Regulator Design
The
MIC49500
programming the output voltage anywhere between
0.7Vand 6V. Two resistors are used. The resistor
value between V
OUT
and the adjust pin should not
exceed 10k
. Larger values can cause instability. The
resistor values are calculated by:
adjustable
version
allows
R1 = R2 ×
V
OUT
0.7
± 1
Where V
OUT
is the desired output voltage.
Enable
The fixed output voltage versions of the MIC49500
feature an active high enable input (EN) that allows
on-off control of the regulator. Current drain reduces
to “zero” when the device is shutdown, with only
microamperes of leakage current. The EN input has
TTL/CMOS compatible thresholds for simple logic
interfacing. EN may be directly tied to V
IN
and pulled
up to the maximum supply voltage.
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| MIC49500WU TR | 功能描述:低壓差穩(wěn)壓器 - LDO 5A LDO, Low Vin, Low Vout, Fast transient response, Cap stable (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(dòng)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(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MIC-5 | 功能描述:保險(xiǎn)絲 250VAC 5A Fast Acting Indicating RoHS:否 制造商:Littelfuse 產(chǎn)品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險(xiǎn)絲類(lèi)型:Fast Acting 保險(xiǎn)絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風(fēng)格: 端接類(lèi)型:SMD/SMT 系列:485 |
| MIC5000AFLMGNHWS | 制造商:Vishay Dale 功能描述:THIN FILM RESISTOR,500 OHM,1%,200PPM - Waffle Pack |
| MIC5000BFLMGGHWS | 制造商:Vishay Dale 功能描述:THIN FILM RESISTOR,500 OHM,1%,200PPM - Waffle Pack |
| MIC5000BFLMGNHWS | 制造商:Vishay Dale 功能描述:THIN FILM RESISTOR,50 OHM,1%,200PPM - Waffle Pack |
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