参数资料
型号: MIC2178-3.3BWM TR
厂商: Micrel Inc
文件页数: 2/15页
文件大小: 0K
描述: IC REG BUCK SYNC 3.3V 20SOIC
标准包装: 1,000
类型: 降压(降压)
输出类型: 固定
输出数: 1
输出电压: 3.3V
输入电压: 4.5 V ~ 16.5 V
PWM 型: 电流模式
频率 - 开关: 200kHz
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: 20-SOIC(0.295",7.50mm 宽)
包装: 带卷 (TR)
供应商设备封装: 20-SOIC(宽型)
其它名称: MIC2178-3.3BWMTR
MIC2178-3.3BWMTR-ND
MIC2178
Ordering Information
Part Number
Micrel, Inc.
Standard*
MIC2178BWM
MIC2178-3.3BWM
MIC2178-5.0BWM
Pb-Free
MIC2178YWM
MIC2178-3.3YWM
MIC2178-5.0YWM
Voltage
ADJ
3.3V
5.0V
Junction Temp.
–40 ° C to +85 ° C
–40 ° C to +85 ° C
–40 ° C to +85 ° C
Package
20-lead WSOIC
20-lead WSOIC
20-lead WSOIC
* Standard product will be supported as Pb-Free IAW PPCN #040004 effective 1-1-2005.
Pin Configuration
VIN 1
VIN 2
SW 3
PGND 4
PGND 5
PGND 6
PGND 7
SW 8
VIN 9
PWM 10
20 EN
19 BIAS
18 SYNC
17 SGND
16 SGND
15 SGND
14 SGND
13 COMP
12 FB
11 PWRGD
20-Lead Wide Power SOIC
Pin Description
Pin Number
1, 2, 9
3, 8
4, 5, 6, 7
10
11
12
13
14, 15, 16, 17
18
19
20
Pin Name
VIN
SW
PGND
PWM
PWRGD
FB
COMP
SGND
SYNC
BIAS
EN
Pin Function
Supply Voltage (Input): Requires bypass capacitor to PGND. All three pins
must be connected to V IN .
Switch (Output): Internal power MOSFET output switches. Both pins must
be externally connected together.
Power Ground: Connect all pins to central ground point.
PWM/Skip-Mode Control (Input): Logic-level input. Controls regulator
operating mode. Logic low enables PWM mode. Logic high enables skip
mode. Do not allow pin to float.
Error Flag (Output): Open-drain output. Active low when FB input is 10%
below the reference voltage (V REF ).
Feedback (Input): Connect to output voltage divider resistors.
Compensation: Output of internal error amplifier. Connect capacitor or
series RC network to compensate the regulator control loop.
Signal Ground: Connect all pins to ground, PGND*.
Frequency Synchronization (Input): Optional. Connect an external clock
signal to synchronize the oscillator. Leading edge of signal above 1.7V
terminates switching cycle. Connect to SGND if not used.
Internal 3.3V Bias Supply: Decouple with 0.01 μ F bypass capacitor to
SGND. Do not apply any external load.
Enable (Input): Logic high enables operation. Logic low shuts down
regulator. Do not allow pin to float.
M9999-031805
2
March 2005
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MIC2178-5.0BWM 功能描述:直流/直流开关调节器 2.5A 200kHz Synchronous Switcher 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
MIC2178-5.0BWM TR 功能描述:直流/直流开关调节器 2.5A 200kHz Synchronous Switcher 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
MIC2178-5.0YWM 功能描述:直流/直流开关调节器 2.5A 200kHz Synchronous Switcher 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
MIC2178-5.0YWM TR 功能描述:直流/直流开关调节器 2.5A 200kHz Synchronous Switcher 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
MIC2178BWM 功能描述:直流/直流开关调节器 2.5A 200kHz Synchronous Switcher 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