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參數(shù)資料
| 型號： | MIC3385-1.5YHL TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 552K |
| 描述： | IC REG DL BCK/LINEAR SYNC 14-MLF |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 拓?fù)洌?/td> | 降壓（降壓）同步（1），線性（LDO）（1） |
| 功能： | 任何功能 |
| 輸出數(shù)： | 2 |
| 頻率 - 開關(guān)： | 8MHz |
| 電壓/電流 - 輸出 1： | 1.5V，1A |
| 電壓/電流 - 輸出 2： | 1.5V，120mA |
| 帶 LED 驅(qū)動器： | 無 |
| 帶監(jiān)控器： | 無 |
| 帶序列發(fā)生器： | 無 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-VFDFN 裸露焊盤，14-MLF? |
| 供應(yīng)商設(shè)備封裝： | 14-MLF?（3x3.5） |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 1093 (CN2011-ZH PDF) |
| 其它名稱： | 576-3110-6 |
Micrel, Inc.
MIC3385
May 2010
11
M9999-051310-B
Application Information
The MIC3385 is a 600mA PWM power supply that
utilizes a LOWQ light load mode to maximize battery
efficiency in light load conditions. This is achieved with a
LOWQ control pin that when pulled low, shuts down all
the biasing and drive current for the PWM regulator,
drawing only 18礎(chǔ) of operating current. This allows the
output to be regulated through the LDO output. It is
capable of providing 60mA of output current. This
method has the advantage of producing a clean, low
current, ultra low noise output in LOWQ mode. During
LOWQ mode, the SW node becomes high impedance,
blocking current flow. Other methods of reducing
quiescent current, such as pulse frequency modulation
(PFM) or bursting techniques create large amplitude, low
frequency ripple voltages that can be detrimental to
system operation.
When more than 60mA is required, the LOWQ pin can
be forced high, causing the MIC3385 to enter PWM
mode. In this case, the LDO output makes a "hand-off"
to the PWM regulator with virtually no variation in output
voltage. The LDO output then turns off allowing up to
600mA of current to be efficiently supplied through the
PWM output to the load.
Input Capacitor
A minimum 1礔 ceramic is recommended on the VIN pin
for bypassing. X5R or X7R dielectrics are recommended
for the input capacitor. Y5V dielectrics lose most of their
capacitance over temperature and are therefore, not
recommended.
A minimum 1礔 is recommended close to the VIN and
PGND pins for high frequency filtering. Smaller case size
capacitors are recommended due to their lower ESR and
ESL. Please refer to layout recommendations for proper
layout of the input capacitor.
Output Capacitor
The MIC3385 is optimized for a 10礔 output capacitor. A
larger value can be used to improve transient response
The MIC3385 utilizes type III internal compensation and
utilizes an internal high frequency zero to compensate
for the double pole roll off of the LC filter. For this
reason, larger output capacitors can create instabilities.
X5R or X7R dielectrics are recommended for the output
capacitor. Y5V dielectrics lose most of their capacitance
over temperature and are therefore, not recommended.
In addition to a 10礔, a small 10nF is recommended
close to the load for high frequency filtering. Smaller
case size capacitors are recommended due to there
lower ESR and ESL.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC3385YHL | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: 制造商:Micrel Inc 功能描述: |
| MIC3385YHL TR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 8MHz Power System Module in 14ld MLF (Lead-Free) RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC3385YHLTR | 制造商:Micrel Inc 功能描述:IC BUCK REG 8MHZ SMD 制造商:Micrel Inc 功能描述:IC, BUCK REG, 8MHZ, SMD 制造商:Micrel 功能描述:DC-DC 8MHz Inductorless LDO Adj MLF14 |
| MIC3385YHL-TR | 功能描述:Linear And Switching Voltage Regulator IC 2 Output Step-Down (Buck) Synchronous (1), Linear (LDO) (1) 8MHz 14-VFDFN Exposed Pad, 14-MLF? 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 拓?fù)?降壓（降壓）同步（1），線性（LDO）（1） 功能:任何功能 輸出數(shù):2 頻率 - 開關(guān):8MHz 電壓/電流 - 輸出 1:可調(diào)至 1V，1A 電壓/電流 - 輸出 2:1V，120mA 電壓/電流 - 輸出 3:- 帶 LED 驅(qū)動器:無 帶監(jiān)控器:無 帶定序器:無 電壓 - 電源:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-VFDFN 裸露焊盤，14-MLF? 供應(yīng)商器件封裝:14-MLF?（3x3.5） 標(biāo)準(zhǔn)包裝:1 |
| MIC3385YML | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:8MHz Power System Module with LDO Standby Mode |
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