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參數資料
| 型號： | MIC4685BR |
| 廠商： | MICREL INC |
| 元件分類： | 穩壓器 |
| 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： | 1/15頁 |
| 文件大小： | 154K |
| 代理商： | MIC4685BR |
MIC4685
Micrel
September 2002
1
MIC4685
MIC4685
3A SPAK SuperSwitcher Buck Regulator
Final
General Description
The MIC4685 is a high-efficiency 200kHz stepdown (buck)
switching regulator. Power conversion efficiency of above
85% is easily obtainable for a wide variety of applications.
The MIC4685 achieves 3A of continuous current in the 7-lead
SPAK package.
The thermal performance of the SPAK allows it to replace
TO-220s and TO-263s (D
2
PAKs) in many applications. The
SPAK saves board space with a 36% smaller footprint than
TO-263.
High efficiency is maintained over a wide output current range
by utilizing a boost capacitor to increase the voltage available
to saturate the internal power switch. As a result of this high
efficiency, only the ground plane of the PCB is needed for a
heat sink.
The MIC4685 allows for a high degree of safety. It has a wide
input voltage range of 4V to 30V (34V transient), allowing it to
be used in applications where input voltage transients may be
present. Built-in safety features include over-current protec-
tion, frequency-foldback short-circuit protection, and thermal
shutdown.
The MIC4685 is available in an 7-lead SPAK package with a
junction temperature range of –40
°
C to +125
°
C.
Typical Applications
BS
IN
1
6
3
4, Tab
2
5
SW
FB
EN
GND
MIC4685BR
C
0.33
μ
F/50V
C
IN
33
μ
F
35V
C
OUT
330
μ
F
6.3V
D1
3A
40V
R1
3.01k
R2
6.49k
L1
39
μ
H
V
8V to 30V
V
1.8V/3A
1.8V Output Converter
Features
Low 2mm profile SPAK package
3A continuous output current
Wide 4V to 30V input voltage range (34V transient)
Fixed 200kHz PWM operation
Over 85% efficiency
Output voltage adjustable to 1.235V
All surface mount solution
Internally compensated with fast transient response
Over-current protection
Frequency foldback short-circuit protection
Thermal shutdown
Applications
Point of load power supplies
Simple high-efficiency step-down regulators
5V to 3.3V/2A conversion
12V to 5V/3.3V/2.5V/1.8V 3A conversion
Dual-output
±
5V conversion
Base stations
LCD power supplies
Battery chargers
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
MIC4685BR
Voltage
Adj
Junction Temperature Range
–
40
°
C to +125
°
C
Package
SPAK-07L
BS
IN
1
6
3
4, Tab
2
5
SW
FB
EN
GND
D
3A, 20V
MIC4685BR
C
0.33
μ
F/50V
C
IN
68
μ
F
10V
330
μ
F
6.3V
D1
3A
20V
R1
3.01k
R2
1.78k
L1
39
μ
H
V
IN
5V
±
10%
V
3.3V/2A
5V to 3.3V Converter
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MIC4685BR TR | 功能描述:IC REG BUCK ADJ 3A SPAK-7 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:SuperSwitcher™ 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關: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 供應商設備封裝: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/直流開關調節器 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 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC4685WR TR | 功能描述:直流/直流開關調節器 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 輸出端數量: 最大工作溫度: 安裝風格: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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