MP1593 – 3A, 28V, 385KHz STEP-DOWN CONVERTER

MP1593 Rev. 1.9

www.MonolithicPower.com

3

9/14/2006

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© 2006 MPS. All Rights Reserved.

Parameter

Symbol Condition

Min

Typ

Max

Units

EN Threshold Voltage

0.9

1.2

1.5

V

Enable Pull Up Current

1.0

1.7

2.5

µA

Under-Voltage Lockout

Threshold

2.3

2.6

2.9

V

Under-Voltage Lockout

Threshold Hysteresis

210

mV

Soft-Start Period

10

ms

Thermal Shutdown

160

°C

TYPICAL PERFORMANCE CHARACTERISTICS

Refer to Typical Application Schematic on Page 1

420

410

400

390

380

370

360

350

340

TEMPERATURE (

°C)

Oscillation Frequency vs

Temperature

5.0

4.9

4.8

4.7

4.6

4.5

4.4

4.3

4.2

4.1

4.0

TEMPERATURE (

°C)

Peak Current Limit vs

Temperature

1.245

1.235

1.225

1.215

1.205

1.195

-60 -40 -20 0 20 40 60 80 100 120 140

TEMPERATURE (

°C)

Feedback Voltage vs

Temperature

-50 -25 -0

25

50

75 100 125 150

-60 -40 -20 0 20 40 60 80 100 120 140

Soft-Start

Waveforms

1V/Div.

1A/Div.

4ms/Div.

1V/Div.

1A/Div.

Turn Off

Waveforms

100mV/Div.

1A/Div.

Load Transient

Waveforms