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參數(shù)資料
| 型號： | MIC49500-1.2WU |
| 廠商： | MICREL INC |
| 元件分類： | 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： | 1.2 V FIXED POSITIVE LDO REGULATOR, 0.5 V DROPOUT, PSSO7 |
| 封裝： | ROHS COMPLIANT, TO-263, 7 PIN |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 233K |
| 代理商： | MIC49500-1.2WU |
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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC49500WR | 5A Dual Supply, Low Voltage, High Bandwidth LDO |
| MIC49500WU | 5A Dual Supply, Low Voltage, High Bandwidth LDO |
| MIC5010 | Full-Featured High- or Low-Side MOSFET Driver |
| MIC5010BM | Full-Featured High- or Low-Side MOSFET Driver |
| MIC5010BN | Full-Featured High- or Low-Side MOSFET Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC49500WR | 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 |
| MIC49500WR 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 |
| MIC49500WR-TR | 功能描述:Linear Voltage Regulator IC Positive Adjustable 1 Output 0.7 V ~ 6 V 5A S-PAK-7 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 穩(wěn)壓器拓?fù)?正，可調(diào)式 電壓 - 輸出:0.7 V ~ 6 V 電流 - 輸出:5A 電壓 - 跌落（典型值）:0.29V @ 5A 穩(wěn)壓器數(shù):1 電壓 - 輸入:1.4 V ~ 6 V 電流 - 限制（最小值）:5.5A 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SPak-7（7 引線 + 接片） 供應(yīng)商器件封裝:S-PAK-7 標(biāo)準(zhǔn)包裝:1 |
| MIC49500WU | 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 |
| 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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