MP2490DQ datasheet(3/13 Pages) MPS

Part #	MP2490DQ

Description	1.5A, 36V, 700KHz Step-Down Converter with Programmable Output Current Limit

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Manufacturer	MPS [Monolithic Power Systems]

Direct Link	http://www.monolithicpower.com

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MP2490 – 1.5A, 36V, 700KHz STEP-DOWN WITH PROGRAMMABLE OUTPUT CURRENT LIMIT

MP2490 Rev. 0.92

www.MonolithicPower.com

3

4/23/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

ELECTRICAL CHARACTERISTICS

VIN = 12V, TA = +25°C, unless otherwise noted.

Parameters

Symbol

Condition

Min

Typ

Max

Units

Feedback Voltage

VFB

4.5V

≤ VIN ≤ 36V

0.785

0.805

0.825

V

Feedback Bias Current

IBIAS(FB)

VFB = 0.8V

10

nA

Switch On Resistance

RDS(ON)

0.25

Ω

Switch Leakage

VEN = 0V, VSW = 0V

0.1

10

μA

Current Limit

(5)

2.2

2.6

3

A

Oscillator Frequency

fSW

VFB = 0.6V

560

700

840

KHz

Fold-Back Frequency

VFB = 0V

200

KHz

Boot-Strap Voltage

VBST - VSW

5

V

Minimum On Time

(5)

tON

VFB = 1V

100

ns

Under Voltage Lockout Threshold Rising

3.0

3.3

3.6

V

Under Voltage Lockout Threshold Hysteresis

200

mV

EN Input Low Voltage

(6)

0.4

V

En Input High Voltage

(6)

1.8

V

EN Input Bias Current

(6)

VEN = 0-6V

–10

–2

10

μA

Supply Current (Shutdown)

VEN = 0V

4

10

μA

Supply Current (Quiescent)

VEN = 2V, VFB = 1V

500

800

μA

Thermal Shutdown

(5)

150

°C

Current Sense Voltage

VISP –VISN VISP, VISN 0.4–15V

90

100

110

mV

Input Bias Current (ISN, ISP)

IBIAS (ISN,ISP) VISP, VISN 0.4–15V

–1

0.1

+1

uA

PGOOD Sink Current

Sink Current 5mA

0.3

V

Note:

5) Guaranteed by design

6) Enable function is only available for the MP2490DQ

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