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參數(shù)資料
| 型號： | MIC4685BR |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3A SPAK SuperSwitcher⑩ Buck Regulator |
| 中文描述： | SWITCHING REGULATOR, 225 kHz SWITCHING FREQ-MAX, PSSO7 |
| 封裝： | SPAK-7 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大小： | 154K |
| 代理商： | MIC4685BR |
MIC4685
Micrel
September 2002
11
MIC4685
L
BS
SW
L1
39
μ
H
IN
EN
FB
GND
C
OUT
R1
R2
D1
V
OUT
MIC4685BR
GND
C
IN
V
+4V to +30V
(34V transient)
7-lead
SPAK
4, Tab
3
1
2
6
5
Figure 2. Critical Traces for Layout
Layout Considerations
Layout is very important when designing any switching regu-
lator. Rapidly changing currents through the printed circuit
board traces and stray inductance can generate voltage
transients which can cause problems.
To minimize stray inductance and ground loops, keep trace
lengths as short as possible. For example, keep D1 close to
pin 6 and pin 4, and Tab, keep L1 away from sensitive node
FB, and keep C
IN
close to pin 2 and pin 4, and Tab. See
Applications nformation: Thermal Considerationsor ground
plane layout.
The feedback pin should be kept as far way from the switching
elements (usually L1 and D1) as possible.
A circuit with sample layouts are provided. See Figure 7.
Gerber files are available upon request.
Bootstrap Diode
The bootstrap diode provides an external bias source directly
to the main pass element, this reduces V
SAT
thus allowing the
MIC4685 to be used in very low head-room applications i.e.
5V
IN
to 3.3V
OUT
with high efficiencies.
Bootstrap diode not for
use if V
IN
exceeds 16V, V
IN
. See Figure 3.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC4685BR TR | 功能描述:IC REG BUCK ADJ 3A SPAK-7 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:SuperSwitcher™ 標(biāo)準(zhǔn)包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關(guān):52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應(yīng)商設(shè)備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| MIC4685BRTR | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| MIC4685WR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Buck Regulator in SPAK-7 (ROHS Compliant) 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 |
| MIC4685WR TR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Buck Regulator in SPAK-7 (ROHS Compliant) 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 |
| MIC4685WREV | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3A SPAK SuperSwitcher Buck Regulator |
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