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參數資料
| 型號： | MIC4682 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | PRECISION CURRENT LIMIT SO-8 SUPERSWITCHER BUCK REGULATOR |
| 中文描述： | 精密電流限制的SO - 8 SUPERSWITCHER降壓穩壓器 |
| 文件頁數： | 1/15頁 |
| 文件大?。?/td> | 226K |
| 代理商： | MIC4682 |
October 2003
1
M0334-102203
MIC4682
Micrel
MIC4682
Precision Current Limit SO-8 SuperSwitcher Buck Regulator
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
General Description
The MIC4682 is an easy-to-use step-down (buck) switch-
mode voltage regulator. It features a programmable current
limit that allows 10% current limit accuracy over its full
operating temperature range. The precision current limit
makes the MIC4682 ideal for constant-voltage constant-
current applications, such as simple battery chargers. The
precision current limit also gives designers the ability to set
the maximum output current below the saturation current
rating of the inductor. This allows the use of the smallest
possible inductors for a given application, saving valuable
space and cost.
The MIC4682 is a very robust device. Its 4V to 34V input
voltage range allows the MIC4682 to safely be used in
applications where voltage transients may be present. Addi-
tional protection features include cycle-by-cycle current lim-
iting and over-temperature shutdown. The MIC4682 is avail-
able in a thermally optimized power SO-8 package that allows
it to achieve 2A of continuous output current.
The MIC4682 requires a minimum number of external com-
ponents and can operate using a standard series of induc-
tors. Compensation is provided internally for fast transient
response and ease of use. The MIC4682 is available in the 8-
lead power SOP with a –40
°
C to +125
°
C junction tempera-
ture range.
Typical Application
SW
L1
68
μ
H
IN
FB
ISET
SHDN
C2
220
μ
F
10V
R1
3.01k
R3
10M
R4
16.2k
R2
976
5V/1A
MIC4682
C1
10
μ
F
50V
(x2)
+7.5V to +34V
2, 6, 7
1
8
5
4
D1
B240
GND
3
0
1
2
3
4
5
6
0
0.5
CURRENT LIMIT (A)
1
1.5
2
O
MIC4682 Current Limit
Characteristics
V
IN
= 12V
Constant Current/Constant Voltage Li Ion Battery Charger
Features
Programmable output current limit
10% accuracy over temperature
Wide 4V to 34V operating input voltage range
Fixed 200kHz PWM operation
Power SO-8 package allows 2A continuous output
current
All surface mount solution
Internally compensated
Less than 1
μ
A typical shutdown-mode current
Thermal shutdown protection
Applications
Battery chargers
White LED drivers
Constant voltage constant current step-down converters
Simple step-down regulator with precise current limit
USB power supplies
SuperSwitcher is a trademark of Micrel, Inc.
相關PDF資料 |
PDF描述 |
|---|---|
| MIC4682BM | PRECISION CURRENT LIMIT SO-8 SUPERSWITCHER BUCK REGULATOR |
| MIC4684 | 150000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
| MIC4684BM | 150000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
| MIC4690 | 150000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
| MIC4690BM | 150000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| MIC4682BM | 功能描述:IC REG BUCK 2A 8SOIC 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 |
| MIC4682BM TR | 功能描述:IC REG BUCK 2A 8SOIC 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 |
| MIC4682YM | 功能描述:直流/直流開關調節器 Precision Current Limit SO-8 Super Switcher (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 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MIC4682YM TR | 功能描述:直流/直流開關調節器 Precision Current Limit SO-8 Super Switcher (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 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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