参数资料
型号: MIC4680-5.0BM TR
厂商: Micrel Inc
文件页数: 1/15页
文件大小: 0K
描述: IC REG BUCK 5V 1A 8SOIC
标准包装: 2,500
系列: SuperSwitcher™
类型: 降压(降压)
输出类型: 固定
输出数: 1
输出电压: 5V
输入电压: 4 V ~ 34 V
PWM 型: 电压模式
频率 - 开关: 200kHz
电流 - 输出: 1A
同步整流器:
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
包装: 带卷 (TR)
供应商设备封装: 8-SOIC
其它名称: MIC4680-5.0BMTR
MIC4680
1A 200kHz SuperSwitcher?
Buck Regulator
General Description
Features
The MIC4680 SuperSwitcher? is an easy-to-use fixed or
adjustable output voltage step-down (buck) switch-mode
voltage regulator. The 200kHz MIC4680 achieves up to
1.3A of continuous output current over a wide input range
in a 8-pin SOIC.
The MIC4680 is available in 3.3V and 5V fixed output
versions or adjustable output down to 1.25V.
The MIC4680 has an input voltage range of 4V to 34V,
with excellent line, load, and transient response. The
regulator performs cycle-by-cycle current limiting and
thermal shutdown for protection under fault conditions. In
shutdown mode, the regulator draws less than 2μA of
standby current.
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SOIC-8 package with up to 1.3A output current
All surface mount solution
Only 4 external components required
Fixed 200kHz operation
3.3V, 5V, and adjustable output versions
Internally compensated with fast transient response
Wide 4V to 34V operating input voltage range
Less than 2μA typical shutdown-mode current
Up to 90% efficiency
Thermal shutdown
Overcurrent protection
The MIC4680 SuperSwitcher? regulator requires a mini-
mum number of external components and can operate
Applications
using a standard series of inductors and capacitors.
Frequency compensation is provided internally for fast
transient response and ease of use.
The MIC4680 is available in the 8-pin SOIC with a
–40°C to +125°C junction temperature range.
Typical Application
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Simple 1A high-efficiency step-down (buck) regulator
Replacement of TO-220 and TO-263 designs
Efficient pre-regulator (5V to 2.5V, 12V to 3.3V, etc.)
On-card switching regulators
Positive-to-negative converter (inverting buck-boost)
Simple battery charger
Negative boost converter
Higher output current regulator using external FET
+6V to +34V
C1
15μF
SHUTDOWN 35V
ENABLE
Power
SOIC-8
2
1
MIC4680-3.3BM
IN SW
SHDN FB
GND
5–8
3
4
L1
68μH
D1
B260A or
SS26
3.3V/1A
C2
220μF
16V
+5V to +34V
C1
15μF
SHUTDOWN 35V
ENABLE
Power
SOIC-8
2
1
MIC4680BM
IN SW
SHDN FB
GND
5–8
3
4
L1
68μH
D1
B260A or
SS26
R1
3.01k
R2
2.94k
2.5V/1A
C2
220μF
16V
Fixed Regulator Circuit
Adjustable Regulator Circuit
SuperSwitcher is a trademark of Micrel, Inc.
Micrel Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel +1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
March 2008
M9999-032808
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