MP2303DN datasheet(3/14 Pages) MPS

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MP2303 – 3A, 28V, 340KHz SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

INITIAL RELEASE – SPECIFICATIONS SUBJECT TO CHANGE

MP2303 Rev. 0.92

www.MonolithicPower.com

5/2/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

ELECTRICAL CHARACTERISTICS

(4) (continued)

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

Parameter

Symbol Condition

Min

Typ

(4)

Max

Units

High-Side Switch-On Resistance

RDS(ON)1

125

mΩ

Low-Side Switch-On Resistance

RDS(ON)2

125

mΩ

High-Side Switch Leakage Current

VEN = 0V, VSW = 0V

µA

Upper-Switch Current Limit

4.3

6.3

Lower-Switch Current Limit

From Drain to Source

1.25

COMP to Current Sense

Transconductance

GCS

A/V

TA = +25°C

300

340

380

KHz

Oscillation Frequency

Fosc1

–40

°C ≤ TA ≤ +85°C

270

400

KHz

Short Circuit Oscillation Frequency

Fosc2

VFB = 0V

110

KHz

Maximum Duty Cycle

DMAX

VFB = 0.7V

Minimum On-Time

220

EN Shutdown Threshold Voltage

VEN Rising

1.1

1.5

2.0

EN Shutdown Threshold Voltage

Hysteresis

220

2.2

2.5

2.7

EN Lockout Threshold Voltage

–40

°C ≤ TA ≤ +85°C

2.1

2.8

EN Lockout Hysteresis

210

VIN rising, TA = +25°C

3.8

4.05

4.30

Input Under Voltage Lockout

Threshold

UVLO

–40

°C ≤ TA ≤ +85°C

3.5

4.70

Input Under Voltage Lockout

Threshold Hysterisis

210

Soft-Start Current

VSS = 0V

µA

Thermal Shutdown

160

°C

Note:

4) 100% production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization.

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