MP29296 datasheet(2/10 Pages) MPS

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MP29296 – 2A, 23V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER

MP29296 Rev. 1.7

www.MonolithicPower.com

2/5/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

PACKAGE REFERENCE

GND

COMP

TOP VIEW

Part Number*

Package

Temperature

MP29296DS

SOIC8

–40° to +85°C

* For Tape & Reel, add suffix –Z (eg. MP29296DS–Z)

For Lead Free, add suffix –LF (eg. MP29296DS–LF–Z)

ABSOLUTE MAXIMUM RATINGS

(1)

Supply Voltage VIN....................... –0.3V to +26V

Switch Voltage VSW.................. –1V to VIN +0.3V

Boost Voltage VBS..........VSW – 0.3V to VSW + 6V

All Other Pins................................. –0.3V to +6V

Junction Temperature...............................150°C

Lead Temperature ....................................260°C

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

Recommended Operating Conditions

(2)

Input Voltage VIN............................ 4.75V to 23V

Output Voltage VOUT .................... 0.923V to 20V

Ambient Operating Temperature .... –40°C to +85°C

Thermal Resistance

(3)

θJA

θJC

SOIC8..................................... 90 ...... 45...

°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

Shutdown Supply Current

VEN = 0V

3.0

µA

Supply Current

VEN = 2.0V; VFB = 1.0V

1.3

1.5

Feedback Voltage

VFB

4.75V

≤ VIN ≤ 23V

0.900

0.923

0.946

Feedback Overvoltage Threshold

1.1

Error Amplifier Voltage Gain

(4)

AEA

400

V/V

Error Amplifier Transconductance

GEA

∆IC = ±10µA

800

µA/V

High-Side Switch On Resistance

(4)

RDS(ON)1

130

mΩ

Low-Side Switch On Resistance

(4)

RDS(ON)2

130

mΩ

High-Side Switch Leakage Current

VEN = 0V, VSW = 0V

µA

Upper Switch Current Limit

Minimum Duty Cycle

2.4

3.4

Lower Switch Current Limit

From Drain to Source

1.1

COMP to Current Sense

Transconductance

GCS

3.5

A/V

Oscillation Frequency

Fosc1

340

KHz

Short Circuit Oscillation Frequency

Fosc2

VFB = 0V

100

KHz

Maximum Duty Cycle

DMAX

VFB = 1.0V

Minimum On Time

(4)

220

EN Shutdown Threshold Voltage

VEN Rising

1.1

1.5

2.0

EN Shutdown Threshold Voltage

Hysteresis

210

EN Lockout Threshold Voltage

2.2

2.5

2.7

EN Lockout Hysterisis

210

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