MIC2544-2BM datasheet(3/12 Pages) MICREL

Part #	MIC2544-2BM

Description	Programmable Current Limit High-Side Switch Preliminary Information

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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3 / 12 page

June 2000

3

MIC2544/2548

Micrel

Electrical Characteristics

V

IN = +5V; TA = 25°C, bold indicates –40°C to +85°C; unless noted

Symbol

Parameter

Condition

Min

Typ

Max

Units

Supply Current

switch off, OUT = open, Note 4

0.75

5

µA

switch on, OUT = open, Note 4

75

160

µA

V

EN

Enable Input Voltage

enable high, Note 4

2.4

1.7

V

enable low, Note 1

1.5

0.8

V

Enable Input Current

V

EN = VOH(min) = 2.4V

0.01

1

µA

V

EN = VOL(max) = 0.8V

0.01

1

µA

Enable Input Capacitance

Note 6

1pF

R

DS(on)

Switch Resistance

I

OUT = 500mA

80

120

m

Ω

Current Limit Factor

I

OUT = 100mA to 1A, VOUT = 1V to 4V, Note 5

184

230

276

V

I

OUT = 500mA to 1.5A, VOUT = 1V to 4V, Note 5

161

230

299

V

Output Leakage Current

switch off

1

10

µA

t

ON

Output Turn-On Delay

R

L = 10Ω, CL = 1µF, Figures 1a, 1b

125

ms

t

R

Output Turn-On Rise Time

R

L = 10Ω, CL = 1µF, Figures 1a, 1b

125

ms

t

OFF

Output Turnoff Delay

R

L = 10Ω, CL = 1µF, Figures 1a, 1b

22

µs

t

F

Output Turnoff Fall Time

R

L = 10Ω, CL = 1µF, Figures 1a, 1b

21

µs

Overtemperature Threshold

T

J increasing

140

°C

Shutdown

T

J decreasing

130

°C

Error Flag Output Resistance

V

IN = 5V, IL = 10µA4

15

Ω

V

IN = 3.3V, IL = 10µA5

20

Ω

Error Flag Off Current

V

FLG = 5V

0.01

1

µA

EN Pulse Reset Width

MIC2548 thermal shutdown latch

5

µs

V

IN to EN Set-Up

MIC2548, Note 6

0

µs

Current-Limit Response Time

V

OUT = 0V, Note 6

25

µs

Overcurrent Flag Response Time

V

OUT = VIN/2 to FLG low

5

µs

Note 1.

Exceeding the absolute maximum rating may damage the device.

Note 2.

The device is not guaranteed to function outside its operating rating.

Note 3.

Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.

Note 4.

Off is

≤ 0.8V and on is ≥ 2.4V for the MIC2544-1 and MIC2548-1. Off is ≥ 2.4V and on is ≤ 0.8V for the MIC2544-2 and MIC2548-2. The

enable input has about 200mV of hysteresis.

Note 5.

Current limit threshold is determined by I

R

LIMIT

SET

==

230V

, where R

SET is in ohms.

Note 6.

Guaranteed by design but not production tested.

Absolute Maximum Ratings (Note 1)

Supply Voltage (V

IN) .................................................. +6.0V

Output Voltage (V

OUT) ............................................... +6.0V

Output Current (I

OUT) ............................... Internally Limited

Enable Input (V

EN) ................................. –0.3V to VIN+0.3V

Fault Flag Voltage (V

FLG) ........................................... +6.0V

Fault Flag Current (I

FLG) ............................................ 50mA

Storage Temperature (T

S) ....................... –65°C to +150°C

Junction Temperature (T

J) ....................... Internally Limited

Lead Temperature (soldering 5 sec.) ........................ 260

°C

ESD Rating, Note 3 ...................................................... 2kV

Operating Ratings (Note 2)

Supply Voltage (V

IN) ................................... +2.7V to +5.5V

Current Limit Set Range .................................. 0.1A to 1.5A

Ambient Temperature Range (T

A) ............. –40°C to +85°C

Package Thermal Resistance

SOP

(θ

JA) .......................................................... 160°C/W

MSOP

(θ

JA) ....................................................... 206°C/W

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