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參數(shù)資料
| 型號： | MIC4681BM |
| 廠商： | MICREL INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2A-Peak SuperSwitcher⑩ SOP-8 Buck Regulator |
| 中文描述： | 2.1 A SWITCHING REGULATOR, 220 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大小： | 395K |
| 代理商： | MIC4681BM |
February 2001
1
MIC4681
MIC4681
Micrel
MIC4681
2A-Peak SuperSwitcher SOP-8 Buck Regulator
Final Information
General Description
The MIC4681 SuperSwitcher is an easy-to-use step-down
(buck) voltage-mode switching regulator. The 200kHz
MIC4681 achieves over 1A of continuous output current over
a 4V to 30V input range in an 8-lead SOPpackage . The
MIC4681 features a high 2.1A minimum current limit, making
the device ideal for pulsed current applications such as GSM
and TDMA cell phone battery chargers and power supplies.
The MIC4681 sustains an output of 4.2V/2A within a typical
GSM charging environment.
The MIC4681 has an input voltage range of 4V to 30V, with
excellent line, load, and transient response. The regulator
performs cycle-by-cycle current limiting and thermal shut-
down for protection under fault conditions. In shutdown
mode, the regulator draws less than 6
μ
A of standby current.
The MIC4681 SuperSwitcher regulator requires a mini-
mum number of external components and can operate using
a standard series of inductors and capacitors. Frequency
compensation is provided internally for fast transient re-
sponse and ease of use.
The MIC4681 is available in the 8-lead SOP with a
–40
°
C to +125
°
C junction temperature range.
Typical Applications
SW
L1
68
μ
H
IN
FB
GND
SHDN
C2
220
μ
F
10V
R1
3.01k
R2
2.94k
2.5V/1A
MIC4681BM
C1
22
μ
F
35V
+5V to +30V
SHUTDOWN
ENABLE
Power
SOP-8
5
–
8
4
3
2
1
D1
B340A or
SS36
Adjustable Regulator Circuit
Features
SO-8 package with over 1A continuous output current
Capable of 2A pulse charging for GSM applications
All surface mount solution
Only 4 external components required
Fixed 200kHz operation
Output adjustable down to 1.25V
Internally compensated with fast transient response
Wide 4V to 30V operating input voltage range
Less than 6
μ
A typical shutdown-mode current
Up to 90% efficiency
Thermal shutdown
Overcurrent protection
Applications
Cellular phone battery charger
Cellular phone power supply
Simple 1A continuous high-efficiency step-down (buck)
regulator
Replacement of a TO-220 and TO-263 designs
Positive-to-negative converter (inverting buck-boost)
Negative boost converter
Higher output current regulator using external FET
Micrel, Inc.
1849 Fortune Drive
San Jose, CA 95131
USA
tel + 1 (408) 944-0800
fax + 1 (408) 944-0970
http://www.micrel.com
SuperSwitcher is a trademark of Micrel, Inc.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MIC4681BM TR | 功能描述:IC REG BUCK ADJ 1A 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)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(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: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 |
| MIC4681YM | 功能描述:直流/直流開關調(diào)節(jié)器 2A Peak SuperSwitcher in SO-8 (Lead Free) 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(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC4681YM TR | 功能描述:直流/直流開關調(diào)節(jié)器 2A Peak SuperSwitcher in SO-8 (Lead Free) 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(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC4682 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:PRECISION CURRENT LIMIT SO-8 SUPERSWITCHER BUCK REGULATOR |
| MIC4682_07 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Precision Current Limit SOIC-8 SuperSwitcher⑩ Buck Regulator |
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