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Standard
Pb-Free
MIC5021
General Description
The MIC5021 high-side MOSFET driver is designed to oper-
ate at frequencies up to 100kHz (5kHz PWM for 2% to 100%
duty cycle) and is an ideal choice for high speed applications
such as motor control, SMPS (switch mode power supplies),
and applications using IGBTs. The MIC5021 can also operate
as a circuit breaker with or without automatic retry.
A rising or falling edge on the input results in a current source
pulse or sink pulse on the gate output. This output current
pulse can turn on a 2000pF MOSFET in approximately 550ns.
The MIC5021 then supplies a limited current (< 2mA), if
necessary, to maintain the output state.
An overcurrent comparator with a trip voltage of 50mV makes
the MIC5021 ideal for use with a current sensing MOSFET. An
external low value resistor may be used instead of a sensing
MOSFET for more precise overcurrent control. An optional
external capacitor placed from the C T pin to ground may be
used to control the current shutdown duty cycle (dead time)
from 20% to < 1%. A duty cycle from 20% to about 75% is
possible with an optional pull-up resistor from C T to V DD .
The MIC5021 is available in 8-pin SOIC and plastic DIP
packages.
Other members of the MIC502x family include the MIC5020
low-side driver and the MIC5022 half-bridge driver with a
cross-conduction interlock.
Micrel, Inc.
MIC5021
High-Speed High-Side MOSFET Driver
Features
? 12V to 36V operation
? 550ns rise/fall time driving 2000pF
? TTL compatible input with internal pull-down resistor
? Overcurrent limit
? Gate to source protection
? Internal charge pump
? 100kHz operation guaranteed over full temperature and
operating voltage range
? Compatible with current sensing MOSFETs
? Current source drive reduces EMI
Applications
? Lamp control
? Heater control
? Motor control
? Solenoid switching
? Switch-mode power supplies
? Circuit breaker
Ordering Information
Part Number Temperature
Range Package
MIC5021BM MIC5021YM –40oC to +85oC 8-pin SOIC
MIC5021BN MIC5021YN –40oC to +85oC 8-pin Plastic DIP
Typical Application
+12V to +36V
10μF
TTL Input
optional*
1
2
3
4
MIC5021
V DD V B OOS T
Input Gate
C T Sense-
Gnd Sense+
8
7
6
5
2.7
nF
N-Channel
Power MOSFET
R S E N S E
R S E N S E
=
50mV
I TR IP
Load
* increases time before retry
High-Side Driver with Overcurrent Trip and Retry
Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
July 2005
1
MIC5021
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相关代理商/技术参数
MIC5021YN 制造商:Micrel Inc 功能描述:Temperature Sensor IC
MIC5022 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Half-Bridge MOSFET Driver
MIC5022_05 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Half-Bridge MOSFET Driver
MIC5022BN 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Half-Bridge MOSFET Driver
MIC5022BWM 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Half-Bridge MOSFET Driver
MIC502BM 功能描述:IC MANAGEMENT FAN/THERMAL 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR
MIC502BM TR 功能描述:IC FAN MANAGEMENT DUAL 8-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR
MIC502BN 功能描述:IC MANAGEMENT FAN/THERMAL 8DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器，步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP（0.295"，7.50mm 宽） 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR