MIC5020 datasheet(3/8 Pages) MICREL

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MIC5020

Micrel, Inc.

July 2005

MIC5020

Electrical Characteristics

TA = 25°C, Gnd = 0V, VDD = 12V, Sense +,– = 0V, Fault = Open, CT = Open, Gate CL = 1500pF unless otherwise speciﬁced

Symbol

Parameter

Condition

Min

Typ

Max

Units

D.C. Supply Current

VDD = 12V, Input = 0V

0.8

VDD = 50V, Input = 0V

VDD = 12V, Input = 5V

0.8

VDD = 50V, Input = 5V

Input Threshold

0.8

1.4

2.0

Input Hysteresis

0.1

Input Pull-Down Current

Input = 5V

µA

Fault Output

Fault Current = 1.6mA

0.15

0.4

Saturation Voltage

Note 1

Fault Output Leakage

Fault = 50V

–1

0.01

µA

Current Limit Threshold

Note 2

Gate On Voltage

VDD = 12V

VDD = 50V

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

400

800

Gate Rise Time

Note 4

700

1500

tDLH

Gate Turn-Off Delay

Note 5

900

1500

Gate Fall Time

Note 6

500

1500

fmax

Maximum Operating Frequency

Note 7

100

150

kHz

Note 1

Voltage remains low for time affected by CT.

Note 2

When using sense MOSFETs, it is recommended that RSENSE < 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 (VDD)...................................................+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 (CT)......................................................+5.5V

Operating Ratings

Supply Voltage (VDD)......................................+11V to +50V

Temperature Range

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

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