MP3908 – HIGH EFFICIENCY BOOST CONTROLLER

MP3908 Rev.0.9

www.MonolithicPower.com

2

8/29/2008

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2008 MPS. All Rights Reserved.

PACKAGE REFERENCE

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TOP VIEW

Part Number*

Package

Temperature

MP3908DK

MSOP10

–40

°C to +85°C

For RoHS compliant packaging, add suffix –LF (eg.

MP3908DK–LF–Z)

ABSOLUTE MAXIMUM RATINGS

(1)

VCC ............................................. –0.3V to +10V

VCC Maximum Current ............................ 30mA

ISENSE ....................................... –0.3V to +28V

FB .............................................. –0.3V to +1.3V

COMP............................................ –0.3V to +3V

CSS, ENABLE ............................... –0.3V to +5V

Junction Temperature...............................125

°C

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

°C

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

°C

Recommended Operating Conditions

(2)

VCC Current ................................. 1mA to 25mA

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

°C to +85°C

Thermal Resistance

(3)

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

Parameter

Symbol Condition

Min

Typ

Max

Units

VCC Undervoltage Lockout

4.5

4.7

V

VCC On/Off Voltage Hysteresis

1

V

Shutdown Current

50

µA

Quiescent Current (Operation)

270

320

µA

Main Gate Driver Impedance

(Sourcing)

16

Ω

Main Gate Driver Impedance

(Sinking)

5.0

Ω

Synchronous Gate Driver

Impedance (Sourcing)

16

Ω

Synchronous Gate Driver

Impedance (Sinking)

5.0

Ω

Delay after Synchronous Gate

50

ns

Error Amplifier Transconductance

0.26

0.38

0.46

mA/V

Maximum Comp Current

Sourcing and Sinking

40

µA

Error Amplifier Translator Gain

(4)

0.28

0.32

0.36

V/V

Switching Frequency

220

260

300

KHz

Thermal Shutdown

150

°C

Maximum Duty Cycle

76

81

86

%

Minimum On Time

200

ns

ISENSE Limit

165

190

215

mV

FB Voltage

0.794

0.818

0.847

V

FB Bias Current

Current flowing out of part

50

nA

Note:

4) Guaranteed by design.