MIC5021BN Micrel Inc, MIC5021BN Datasheet

IC DRIVER MOSFET HI SIDE HS 8DIP

MIC5021BN

Manufacturer Part Number
MIC5021BN
Description
IC DRIVER MOSFET HI SIDE HS 8DIP
Manufacturer
Micrel Inc
Datasheet

Specifications of MIC5021BN

Configuration
High-Side
Input Type
Non-Inverting
Delay Time
500ns
Number Of Configurations
1
Number Of Outputs
1
Voltage - Supply
12 V ~ 36 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Peak
-
High Side Voltage - Max (bootstrap)
-

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Manufacturer
Quantity
Price
Part Number:
MIC5021BN
Manufacturer:
MICREL
Quantity:
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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
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
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.
Typical Application
July 2005
MIC5021
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
TTL Input
optional*
10µF
High-Side Driver with Overcurrent Trip and Retry
T
pin to ground may be
1
2
3
4
V
Input
C
Gnd
DD
T
MIC5021
T
to V
V
Sense-
Sense+
B OOS T
Gate
DD
.
8
7
6
5
1
Load
+12V to +36V
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
• 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
2.7
nF
Standard
MIC5021BM MIC5021YM –40ºC to +85ºC 8-pin SOIC
MIC5021BN MIC5021YN –40ºC to +85ºC 8-pin Plastic DIP
operating voltage range
High-Speed High-Side MOSFET Driver
N-Channel
Power MOSFET
R
Part Number
S E N S E
R
S E N S E =
* increases time before retry
Pb-Free
50mV
I
TR IP
MIC5021
Temperature
Range
Package
Micrel, Inc.
MIC5021

Related parts for MIC5021BN

MIC5021BN Summary of contents

Page 1

... Motor control • Solenoid switching pin to ground may be • Switch-mode power supplies T • Circuit breaker Ordering Information T DD Standard MIC5021BM MIC5021YM –40ºC to +85ºC 8-pin SOIC MIC5021BN MIC5021YN –40ºC to +85ºC 8-pin Plastic DIP +12V to +36V MIC5021 OOS N-Channel Input ...

Page 2

MIC5021 Pin Configuration Block Diagram 6V Internal Regulator C INT Sense+ Sense- 50mV Input Transistor: 106 Pin Description Pin Number Pin Name Input Gnd 5 Sense + 6 Sense – 7 Gate 8 V ...

Page 3

MIC5021 Absolute Maximum Ratings Supply Voltage (V ) ................................................... +40V DD Input Voltage .................................................–0.5V to +15V Sense Differential Voltage .......................................... ±6.5V Sense + or Sense – to Gnd ...........................–0.5V to +36V Timer Voltage (C ) ...................................................... +5. Capacitor ...

Page 4

MIC5021 Typical Characteristics Supply Current vs. Supply Voltage 2 2 1.0 0.5 0 (V) SUPPLY Gate Turn-On Delay vs. Supply Voltage 1000 ...

Page 5

MIC5021 Functional Description Refer to the MIC5021 block diagram. Input A signal greater than 1.4V (nominal) applied to the MIC5021 causes gate enhancement on an external MOSFET INPUT turning the MOSFET on. An internal pull-down resistor insures that an open ...

Page 6

MIC5021 Logic-Level MOSFET Precautions Logic-level MOSFETs have lower maximum gate-to-source voltage ratings (typically ±10V) than standard MOSFETs (typically ±20V). When an external MOSFET is turned on, the doubling effect of the boost capacitor can cause the gate-to-source voltage to momentarily ...

Page 7

MIC5021 Circuits Without Current Sensing MIC5021 1 8 10µ TTL Input Input Gate Sense Gnd Sense+ Figure 4a. Connecting Sense to Source MIC5021 1 ...

Page 8

MIC5021 External Protection Resistors placed in series with each the current drawn from the internal Schottky diodes during a negative transient. This minimizes the forward drop across the diodes. MIC5021 ...

Page 9

MIC5021 Remote Overcurrent Limiting Reset In circuit breaker applications where the MIC5021 maintains an off condition after an overcurrent condition is sensed, the C pin can be used to reset the MIC5021. T MIC5021 1 10µ ...

Page 10

... MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...

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