MIC5021 datasheet(3/10 Pages) MICREL

3 / 10 page

July 2005

MIC5021

Micrel, Inc.

Electrical Characteristics

TA = 25°C, Gnd = 0V, VDD = 12V, CT = Open, Gate CL = 1500pF (IRF540 MOSFET) unless otherwise speciﬁed

Symbol

Parameter

Condition

Min

Typ

Max

Units

D.C. Supply Current

VDD = 12V, Input = 0V

1.8

VDD = 36V, Input = 0V

2.5

VDD = 12V, Input = 5V

1.7

VDD = 36V, Input = 5V

2.5

Input Threshold

0.8

1.4

2.0

Input Hysteresis

0.1

Input Pull-Down Current

Input = 5V

µA

Current Limit Threshold

Note 1

Gate On Voltage

VDD = 12V Note 2

VDD = 36V Note 2

tG(ON)

Gate On Time, Fixed

Sense Differential > 70mV

µs

tG(OFF)

Gate Off Time, Adjustable

Sense Differential > 70mV, CT = 0pF

µs

tDLH

Gate Turn-On Delay

Note 3

500

1000

Gate Rise Time

Note 4

400

500

tDLH

Gate Turn-Off Delay

Note 5

800

1500

Gate Fall Time

Note 6

400

500

fmax

Maximum Operating Frequency

Note 7

100

150

kHz

Note 1

When using sense MOSFETs, it is recommended that RSENSE < 50Ω. Higher values may affect the sense MOSFET’s current transfer ratio.

Note 2

DC measurement.

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 17V.

Note 5

Input switched from 2.0V (TTL high) to 0.8V (TTL low), time for Gate transition from 20V (Gate on voltage) to 17V.

Note 6

Input switched from 2.0V (TTL high) to 0.8V (TTL low), time for Gate transition from 17V to 2V.

Note 7

Frequency where gate on voltage reduces to 17V with 50% input duty cycle.

Absolute Maximum Ratings

Supply Voltage (VDD)...................................................+40V

Input Voltage .................................................–0.5V to +15V

Sense Differential Voltage .......................................... ±6.5V

Sense + or Sense – to Gnd...........................–0.5V to +36V

Timer Voltage (CT)......................................................+5.5V

VBOOST Capacitor..................................................... 0.01µF

Operating Ratings

Supply Voltage (VDD)..................................... +12V to +36V

Temperature Range

PDIP ..................................................................... –40°C to +85°C

SOIC ...................................................... –40°C to +85°C

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