MP28369 datasheet(2/8 Pages) MPS

2 / 8 page

MP28369 – 2A, 16V, 1.4MHz STEP-DOWN CONVERTER

MP28369 Rev. 1.0

www.MonolithicPower.com

12/13/2007

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

PACKAGE REFERENCE

COMP

GND

TOP VIEW

MP28369_PD01_MSOP10

Part Number*

Package

Temperature

MP28369DK

MSOP10

–40

°C to +85°C

* For Tape & Reel, add suffix –Z (eg. MP28369DK–Z)

For Lead Free, add suffix –LF (eg. MP28369DK–LF–Z)

ABSOLUTE MAXIMUM RATINGS

(1)

Supply Voltage (VIN) .................................... 18V

Switch Node Voltage (VSW).......................... 16V

Bootstrap Voltage (VBS) ....................... VSW + 6V

Feedback Voltage (VFB) ................. –0.3V to +6V

Enable/UVLO Voltage (VEN)........... –0.3V to +6V

Comp Voltage (VCOMP) ................... –0.3V to +6V

Junction Temperature.............................+150

°C

Lead Temperature ..................................+260

°C

Storage Temperature ..............–65°C to +150

°C

Recommended Operating Conditions

(2)

Supply Voltage (VIN) ...................... 4.75V to 16V

Operating Temperature .............–40

°C to +85°C

Thermal Resistance

(3)

θJA

θJC

MSOP10 ................................ 150 ..... 65...

°C/W

Notes:

1) Exceeding these ratings may damage the device.

2) The device is not guaranteed to function outside of its

operating conditions.

3) Measured on approximately 1” square of 1 oz copper.

ELECTRICAL CHARACTERISTICS

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

Parameter

Symbol Condition

Min

Typ

Max

Units

Feedback Voltage

VFB

0.892

0.920

0.948

Upper Switch On Resistance

RDS(ON)1

0.18

Ω

Upper Switch Leakage

VEN = 0V, VSW = 0V

μA

Current Limit

(4)

2.5

3.5

Current Sense Transconductance

Output Current to Comp Pin Voltage

GCS

1.95

A/V

Error Amplifier Voltage Gain

AVEA

400

V/V

Error Amplifier Transconductance

GEA

ΔIC = ±10μA

630

930

1230

μA/V

Oscillator Frequency

1.4

MHz

Short Circuit Frequency

VFB = 0V

210

KHz

Soft-Start Pin Equivalent Output

Resistance

kΩ

Maximum Duty Cycle

DMAX

VFB = 0.8V

EN Shutdown Threshold Voltage

VEN

ICC > 100μA

0.7

1.0

1.3

Enable Pull-Up Current

IEN

VEN = 0V

1.0

μA

EN UVLO Threshold Rising

VUVLO VEN Rising

2.37

2.50

2.62

EN UVLO Threshold Hysteresis

210

Supply Current (Shutdown)

IOFF

VEN ≤ 0.4V

μA

Supply Current (Quiescent)

ION

VEN ≥ 3V

1.2

1.4

Thermal Shutdown

160

°C

Note:

4) Equivalent output current = 1.5A ≥ 50% Duty Cycle

2.0A ≤ 50% Duty Cycle

Assumes ripple current = 30% of load current.

Slope compensation changes current limit above 40% duty cycle.

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