OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MIC5020YM-TR

P1-P3P4-P6P7-P8
MIC5020 Micrel, Inc.
July 2005 1 MIC5020
General Description
The MIC5020 low-side MOSFET driver is designed to operate
at frequencies greater than 100kHz (5kHz PWM for 2% to
100% duty cycle) and is an ideal choice for high-speed ap-
plications such as motor control, SMPS (switch mode power
supplies), and applications using IGBTs. The MIC5020 can
also operate as a circuit breaker with or without automatic
retry. The MIC5020’s maximum supply voltage lends itself
to control applications using up to 50V. The MIC5020 can
control MOSFETs that switch voltages greater than 50V.
A rising or falling edge on the input results in a current source
or sink pulse on the gate output. This output current pulse
can turn on or off a 2000pF MOSFET in approximately 175ns.
The MIC5020 then supplies a limited current (< 2mA), if
necessary, to maintain the output state.
An overcurrent comparator with a trip voltage of 50mV makes
the MIC5020 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 connected to the C
T
pin may be
used to control the current shutdown duty cycle 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
. An open
collector output provides a fault indication when the sense
inputs are tripped.
The MIC5020 is available in 8-pin SOIC package.
Other members of the MIC502x series include the MIC5021
high-side driver and the MIC5022 half-bridge driver with a
cross-conduction interlock.
MIC5020
Current-Sensing Low-Side MOSFET Driver
Ordering Information
Part Number Temperature
Range
Package
Standard Pb-Free
MIC5020BM MIC5020YM –40ºC to +85ºC 8-pin SOIC
Low-Side Driver with Overcurrent Trip and Retry
Features
• 11V to 50V operation
• 175ns rise/fall time driving 2000pF
• TTL compatible input with internal pull-down resistor
• Overcurrent limit
• Fault output indication
• Gate to source protection
• Compatible with current sensing MOSFETs
Applications
• Lamp control
• Heater control
• Motor control
• Solenoid switching
• Switch-mode power supplies
• Circuit breaker
Typical Application
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
V
DD
Input
Fault
C
T
Gate
Sense-
Sense+
Gnd
150kHz max.
N-Channel
Power MOSFET
V+
MIC5020
1
2
3
4
8
7
6
5
10µF
R
S E N S E
+11V to +50V
R
S E N S E
=
50mV
I
TR I P
* increases time before retry
optional*
MIC5020 Micrel, Inc.
MIC5020 2 July 2005
Pin Description
Pin Number Pin Name Pin Function
1 V
DD
Supply: +11V to +50V. Decouple with ≥ 10µF capacitor.
2 Input TTL Compatible Input: Logic high turns the external MOSFET on. An internal
pull-down returns an open pin to logic low.
3 Fault Overcurrent Fault Indicator: When the sense voltage exceeds threshold,
open collector output is open circuit for 5µs (t
G(ON)
), then pulled low for
t
G(OFF)
. t
G(OFF)
is adjustable from C
T
.
4 C
T
Retry Timing Capacitor: Controls the off time (t
G(OFF)
) of the overcurrent
retry cycle. (Duty cycle adjustment.)
• Open = 20% duty cycle.
• Capacitor to Ground = approx. 20% to <1% duty cycle.
• Pull-Up resistor = approx. 20% to approx. 75% duty cycle.
• Ground = maintained shutdown upon overcurrent condition.
5 Gnd Circuit Ground
6 Sense + Current Sense Comparator (+) Input: Connect to high side of sense resistor
or current sensing MOSFET sense lead. A built-in offset in conjunction with
R
SENSE
sets the load overcurrent trip point.
7 Sense – Current Sense Comparator (–) Input: Connect to the low side of the sense
resistor (usually power ground).
8 Gate Gate Drive: Drives the gate of an external power MOSFET. Also limits V
GS
to 15V max. to prevent Gate to Source damage. Will sink and source
current.
Pin Configuration
1
2
3
4
8
7
6
5
Gate
Sense-
Sense+
Gnd
V
DD
Input
Fault
C
T
Block Diagram
Sense-
Sense+
6V Internal Regulator
C
INT
I
1
2I
1
50mV
Input
ONE-
SH OT
V
DD
Gate
Fault
C
T
6V
OF F
ON
Fault
Normal
I
2
10I
2
Q1
↓
↑
Transistor Count: 82
SOIC Package
(M)
MIC5020 Micrel, Inc.
July 2005 3 MIC5020
Electrical Characteristics
T
A
= 25°C, Gnd = 0V, V
DD
= 12V, Sense +,– = 0V, Fault = Open, C
T
= Open, Gate C
L
= 1500pF unless otherwise specificed
Symbol Parameter Condition Min Typ Max Units
D.C. Supply Current V
DD
= 12V, Input = 0V 0.8 2 mA
V
DD
= 50V, Input = 0V 2 10 mA
V
DD
= 12V, Input = 5V 0.8 2 mA
V
DD
= 50V, Input = 5V 4 25 mA
Input Threshold 0.8 1.4 2.0 V
Input Hysteresis 0.1 V
Input Pull-Down Current Input = 5V 10 20 40 µA
Fault Output Fault Current = 1.6mA 0.15 0.4 V
Saturation Voltage
Note 1
Fault Output Leakage Fault = 50V –1 0.01 +1 µA
Current Limit Threshold
Note 2 30 50 70 mV
Gate On Voltage V
DD
= 12V 10 11 V
V
DD
= 50V 14 15 18 V
t
G(ON)
Gate On Time, Fixed Sense Differential > 70mV 2 5 10 µs
t
G(OFF)
Gate Off Time, Adjustable Sense Differential > 70mV, C
T
= 0pF 10 20 50 µs
t
DLH
Gate Turn-On Delay Note 3 400 800 ns
t
R
Gate Rise Time Note 4 700 1500 ns
t
DLH
Gate Turn-Off Delay Note 5 900 1500 ns
t
F
Gate Fall Time Note 6 500 1500 ns
f
max
Maximum Operating Frequency Note 7 100 150 kHz
Note 1 Voltage remains low for time affected by C
T
.
Note 2 When using sense MOSFETs, it is recommended that R
SENSE
< 50Ω. Higher values may affect the sense MOSFET’s current transfer ratio.
Note 3 Input switched from 0.8V (TTL low) to 2.0V (TTL high), time for Gate transition from 0V to 2V.
Note 4 Input switched from 0.8V (TTL low) to 2.0V (TTL high), time for Gate transition from 2V to 10V.
Note 5 Input switched from 2.0V (TTL high) to 0.8V (TTL low), time for Gate transition from 11V (Gate ON voltage) to 10V.
Note 6 Input switched from 2.0V (TTL high) to 0.8V (TTL low), time for Gate transition from 10V from 2V.
Note 7 Frequency where gate on voltage reduces to 10V with 50% input duty cycle.
Absolute Maximum Ratings
Supply Voltage (V
DD
) ................................................... +55V
Input Voltage .................................................
–0.5V to +15V
Sense Differential Voltage ..........................................
±6.5V
Sense + or Sense – to Gnd ...........................–0.5V to +50V
Fault Voltage ...............................................................
+50V
Current into Fault ........................................................ 50mA
Timer Voltage (C
T
) ......................................................+5.5V
Operating Ratings
Supply Voltage (V
DD
) ......................................+11V to +50V
Temperature Range
SOIC ....................................................... –40°C to +85°C
P1-P3P4-P6P7-P8

MIC5020YM-TR

Mfr. #:
Buy MIC5020YM-TR
Manufacturer:
Microchip Technology / Micrel
Description:
Gate Drivers High Speed Low Side MOSFET Driver
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet