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參數(shù)資料
| 型號(hào)： | MIC5249 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | Low Input Voltage 3A Synchronous Buck Converter for Sequencing 20-HTSSOP -40 to 85 |
| 中文描述： | 300mA的LDO的管理平臺(tái)，具有可編程電重置延遲 |
| 文件頁(yè)數(shù)： | 1/7頁(yè) |
| 文件大小： | 40K |
| 代理商： | MIC5249 |
March 2004
1
M0382-033004
MIC5249
Micrel
MIC5249
300mA
μ
Cap LDO with Programmable Power-On Reset Delay
General Description
The MIC5249 is an efficient, precise 300mA CMOS voltage
regulator with power-on reset delay which can be imple-
mented via an external capacitor. It offers 1% initial accuracy,
extremely-low-dropout voltage (typically 400mV @ 300mA),
and low ground current (typically 85mA) over load.
Designed specifically for noise-critical applications in hand-
held or battery-powered devices, the MIC5249 comes
equipped with a noise reduction feature to filter the output
noise via an external capacitor. Other features of the MIC5249
include a logic compatible enable pin, current limit, thermal
shutdown, ultra-fast transient response, and an active clamp
to speed up device turnoff.
The MIC5249 also works with low-ESR ceramic capacitors,
reducing the amount of board space necessary for power
applications, critical in hand-held wireless devices.
The MIC5249 is available in the MSOP-8 package.
All support documentation can be found on Micrel’s web site
at www.micrel.com.
Typical Application
MIC5249-x.xBMM
IN
OUT
GND
V
IN
RESET
C
=2.2
μ
F
Ceramic
C
BYP
=0.01
μ
F
Sets the delay for
the RESET output
Ultra-Low-Noise Application
C
=1.0
μ
F
Ceramic
V
OUT
EN
DELAY
RESET
CBYP
SHENABLE
Features
300mA output current
High PSRR: 65dB@120Hz
Stable with ceramic output capacitor
Power-on RESET output with adjustable delay time
High output accuracy:
±
1.0% initial accuracy
±
3.0% over temperature
Low dropout voltage of 400mV @ 300mA
Low quiescent current: 85
μ
A
Zero current shutdown mode
Thermal shutdown protection
Current-limit protection
Tiny MSOP-8 package
Applications
Cellular phones
PDAs
Fiber optic modules
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
Ordering Information
Part Number
MIC5249-1.8BMM
MIC5249-2.5BMM
MIC5249-2.6BMM
MIC5249-2.8BMM
MIC5249-2.85BMM
MIC5249-3.0BMM
* Other voltages available. Contact Micrel for details.
Voltage*
1.8V
2.5V
2.6V
2.8V
2.85V
3.0V
Junction Temp. Range
–40
°
C to 125
°
C
–40
°
C to 125
°
C
–40
°
C to 125
°
C
–40
°
C to 125
°
C
–40
°
C to 125
°
C
–40
°
C to 125
°
C
Package
MSOP-8
MSOP-8
MSOP-8
MSOP-8
MSOP-8
MSOP-8
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC5249-2.5BMM | 300MA UCAP LDO WITH PROGRAMMABLE POWER ON RESET DELAY |
| MIC5249-2.6BMM | 300MA UCAP LDO WITH PROGRAMMABLE POWER ON RESET DELAY |
| MIC5249-2.85BMM | 300MA UCAP LDO WITH PROGRAMMABLE POWER ON RESET DELAY |
| MIC5249-2.8BMM | 300MA UCAP LDO WITH PROGRAMMABLE POWER ON RESET DELAY |
| MIC5250-3.0BMM | Dual 150mA レCap CMOS LDO Regulator Preliminary Information |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC5249_12 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:300mA μCap LDO with Programmable Power-On Reset Delay |
| MIC5249-1.5YMM | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA uCapl LDO with Reset (Lead Free) 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MIC5249-1.5YMM TR | 功能描述:低壓差穩(wěn)壓器 - LDO 300mA uCapl LDO with Reset (Lead Free) 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MIC5249-1.8BMM | 功能描述:IC REG LDO 1.8V .3A 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:500 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:12V 輸入電壓:14.5 V ~ 35 V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:500mA 電流 - 限制（最小）:- 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:TO-205AD，TO-39-3 金屬罐 供應(yīng)商設(shè)備封裝:TO-39 包裝:散裝 其它名稱:*LM78M12CH*LM78M12CH/NOPBLM78M12CH |
| MIC5249-1.8BMM TR | 功能描述:IC REG LDO 1.8V .3A 8-MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:500 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:12V 輸入電壓:14.5 V ~ 35 V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:500mA 電流 - 限制（最小）:- 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:TO-205AD，TO-39-3 金屬罐 供應(yīng)商設(shè)備封裝:TO-39 包裝:散裝 其它名稱:*LM78M12CH*LM78M12CH/NOPBLM78M12CH |
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