参数资料
型号: MIC2171BU
厂商: Micrel Inc
文件页数: 1/12页
文件大小: 0K
描述: IC REG MULTI CONFIG 2.5A TO263-5
标准包装: 50
类型: 降压(降压),升压(升压),反相,Cuk
输出数: 1
输入电压: 3 V ~ 40 V
PWM 型: 电流模式
频率 - 开关: 100kHz
电流 - 输出: 2.5A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: TO-263-6,D²Pak(5 引线+接片),TO-263BA
包装: 管件
供应商设备封装: TO-263-5
MIC2171
100kHz 2.5A Switching Regulator
General Description
Features
The MIC2171 is a complete 100kHz SMPS current-mode
controller with an internal 65V 2.5A power switch.
Although primarily intended for voltage step-up applica-
tions, the floating switch architecture of the MIC2171
makes it practical for step-down, inverting, and Cuk config-
urations as well as isolated topologies.
Operating from 3V to 40V, the MIC2171 draws only 7mA
of quiescent current, making it attractive for battery
operated supplies.
The MIC2171 is available in a 5-pin TO-220 or TO-263 for
–40°C to +85°C operation.
Data sheets and support documentation can be found on
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2.5A, 65V internal switch rating
3V to 40V input voltage range
Current-mode operation, 2.5A peak
Internal cycle-by-cycle current limit
Thermal shutdown
Twice the frequency of the LM2577
Low external parts count
Operates in most switching topologies
7mA quiescent current (operating)
Fits LT1171/LM2577 TO-220 and TO-263 sockets
Micrel’s web site at: www.micrel.com.
Applications
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Laptop/palmtop computers
Battery operated equipment
Hand-held instruments
Off-line converter up to 50W(requires external power
switch)
? Pre-driver for higher power capability
___________________________________________________________________________________________________________
Typical Application
L1
15μH
V OU T
+12V, 0.25A
1N5822
R2
C2
GND
1.24k
470μF 1%
GND
+5V
(4.75V min.)
C1*
47μF
IN D1
SW
R1
MIC2171 10.7k
1%
COMP FB
R3
1k
C3
1μF
* Locate near MIC2171 when supply leads > 2”
V IN
4V to 6V
C1
47μF
IN
MIC2171
COMP
R3
1k
C2
1μF
R4*
SW
FB
T1
C3*
D1*
1:1.25
L P R I = 12μH
D2
1N5818
V OU T
5V, 0.5A
R1
C4 3.74k
470μF 1%
R2
1.24k
1%
* Optional voltage clipper (may be req’d if T1 leakage inductance too high)
Figure 1. MIC2171 5V to 12V Boost Converter
Figure 2. MIC2171 5VFlyback Converter
Micrel Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel +1 ( 408 ) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
May 2007
1
M9999-051107
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相关代理商/技术参数
参数描述
MIC2171BU TR 功能描述:IC REG MULTI CONFIG 2.5A TO263-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:20 系列:SIMPLE SWITCHER® 类型:降压(降压) 输出类型:固定 输出数:1 输出电压:12V 输入电压:4 V ~ 60 V PWM 型:电压模式 频率 - 开关:52kHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:16-DIP(0.300",7.62mm) 包装:管件 供应商设备封装:16-DIP 其它名称:*LM2575HVN-12LM2575HVN-12
MIC2171WT 功能描述:直流/直流开关调节器 2.5A 100kHz Switching Regulator (ROHS Compliant) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MIC2171WU 功能描述:直流/直流开关调节器 2.5A 100kHz Switching Regulator (ROHS Compliant) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MIC2171WU TR 功能描述:直流/直流开关调节器 2.5A 100kHz Switching Regulator (ROHS Compliant) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MIC2171WU-TR 功能描述:Buck, Boost, Cuk, Flyback, Forward Converter Switching Regulator IC Positive or Negative, Isolation Capable Adjustable 1 Output 2.5A (Switch) TO-263-6, D2Pak (5 Leads + Tab), TO-263BA 制造商:microchip technology 系列:- 包装:剪切带(CT) 零件状态:有效 功能:升压,降压,升压/降压 输出配置:正或负,可提供隔离 拓扑:降压,升压,Cuk,反激,正激转换器 输出类型:可调式 输出数:1 电压 - 输入(最小值):3V 电压 - 输入(最大值):40V 电压 - 输出(最小值/固定):- 电压 - 输出(最大值):65V(开关) 电流 - 输出:2.5A(开关) 频率 - 开关:100kHz 同步整流器:无 工作温度:-40°C ~ 85°C(TA) 安装类型:表面贴装 封装/外壳:TO-263-6,D2Pak(5 引线+接片),TO-263BA 供应商器件封装:TO-263-5 标准包装:1