參數(shù)資料
型號(hào)： MIC4684BM
廠商： MICREL INC
元件分類： 穩(wěn)壓器
英文描述： 150000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN
中文描述： SWITCHING REGULATOR, 225 kHz SWITCHING FREQ-MAX, PDSO8
封裝： SOP-8
文件頁(yè)數(shù)： 1/16頁(yè)
文件大小： 213K
代理商： MIC4684BM
July 2001
1
MIC4684
MIC4684
Micrel
MIC4684
2A High-Efficiency SuperSwitcher Buck Regulator
Final Information
General Description
The MIC4684 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 MIC4684 achieves 2A of continuous current in an 8-lead
SO (small outline) package at 60
°
C ambient temperature.
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, no external heat sink is required. The MIC4684,
housed in an SO-8, can replace larger TO-220 and TO-263
packages in many applications.
The MIC4684 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 MIC4684 is available in an 8-lead SO package with a
junction temperature range of –40
°
C to +125
°
C.
Typical Application
BS
VIN
4
1
5
2, 6, 7
3
8
SW
FB
EN
GND
MIC4684BM
C
0.33
μ
F/50V
C
IN
33
μ
F
35V
330
μ
F
6.3V
3A
40V
R1
3.01k
R2
3.01k
68
μ
H
V
6.5V to 25V
V
2.5V/1.5A
Adjustable Buck Converter
BS
VIN
4
1
5
2, 6, 7
3
8
SW
FB
EN
GND
1A, 20V
MIC4684BM
C
0.33
μ
F/50V
C
IN
68
μ
F
10V
220
μ
F
10V
2A
20V
47
μ
H
V
IN
5V
±
10%
V
3.3V/1.7A
Feed forward diode
5V to 3.3V Converter
Features
SO-8 package with 2A continuous output current
Over 85% efficiency
Fixed 200kHz PWM operation
Wide 4V to 30V input voltage range
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
Simple high-efficiency step-down regulator
5V to 3.3V/1.7A converter (60
°
C ambient)
12V to 1.8V/2A converter (60
°
C ambient)
On-card switching regulator
Dual-output
±
5V converter
Battery charger
Micrel, Inc.
1849 Fortune Drive
San Jose, CA 95131
USA
tel + 1 (408) 944-0800
fax + 1 (408) 944-0970
http://www.micrel.com
0
20
40
60
80
100
0
0.5
1
1.5
2
E
OUTPUT CURRENT (A)
Efficiency
vs. Output Current
V
OUT
= 1.8V
V
OUT
= 2.5V
V
OUT
= 3.3V
V
IN
= 5.0V
Efficiency vs. Output Current
Ordering Information
Part Number
MIC4684BM
Voltage
Adj
Junction Temperature Range
–
40
°
C to +125
°
C
Package
SOP-8
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MIC4684BM TR 功能描述:IC REG BUCK ADJ 2A 8SOIC 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
MIC4684YM 功能描述:直流/直流開關(guān)調(diào)節(jié)器 SO-8 Efficient Simple Buck Regulator (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
MIC4684YM TR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 SO-8 Efficient Simple Buck Regulator (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
MIC4684YM 制造商:Micrel Inc 功能描述:IC VOLTAGE REGULATOR SOIC
MIC4684YM 制造商:Micrel Inc 功能描述:Voltage Regulator IC
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