MP2109 datasheet(2/8 Pages) MPS

2 / 8 page

MP2109 – DUAL 1.2MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER

MP2109 Rev.1.3

www.MonolithicPower.com

2/21/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

PACKAGE REFERENCE

Part Number*

Package

Temperature

MP2109DQ

QFN10

(3mm x 3mm)

–40

°C to +85°C

* For Tape & Reel, add suffix –Z (eg. MP2109DQ–Z)

For Lead Free, add suffix –LF (eg. MP2109DQ–LF–Z)

ABSOLUTE MAXIMUM RATINGS (1)

VIN1/IN2 to GND ............................ –0.3V to +6.5V

VSW1/SW2 to GND................... –0.3V to VIN + 0.3V

VFB1/FB2, VEN1/EN2 to GND ............. –0.3V to +6.5V

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

°C

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

°C

Storage Temperature .............–65

°C to +150°C

Recommended Operating Conditions

(2)

Supply Voltage VIN1/IN2 ....................... 2.5V to 6V

Output Voltage VOUT1/OUT2 .................. 0.6V to 6V

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

°C to +85°C

Thermal Resistance

(3)

θJA

θJC

QFN10 (3mm x 3mm)............. 50 ...... 12...

°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 (4)

VIN1/IN2 = VEN1/EN2 = 3.6V, TA = +25°C, unless otherwise noted.

Parameter

Symbol Condition

Min

Typ

Max

Units

Each Converter Supply Current

VEN1/EN2 = VIN1/IN2, VFB1/FB2 = 0.65V

440

600

µA

Each Converter Shutdown

Current

VEN1/EN2 = 0V, VIN1/IN2 = 6V

0.10

µA

IN Under Voltage Lockout

Threshold

Rising Edge

2.15

2.30

2.40

IN Under Voltage Lockout

Hysteresis

TA = +25°C

0.588

0.600

0.612

Regulated FB Voltage

VFB

–40°C ≤ TA ≤ +85°C

0.582

0.600

0.618

FB Input Bias Current

IFB

VFB1/FB2 = 0.65V

–50

0.5

+50

PFET On Resistance

ISW1/SW2 = 100mA

0.42

Ω

NFET On Resistance

ISW1/SW2 = –100mA

0.26

Ω

SW Leakage Current

VEN1/EN2 = 0V, VIN1/IN2 = 6V

VSW1/SW2 = 0V or 6V

–2

µA

PFET Current Limit

Duty Cycle = 100%,

Current Pulse Width < 1ms

0.9

1.3

1.8

Oscillator Frequency

fOSC

0.99

1.24

1.49

MHz

Thermal Shutdown Trip

Threshold

150

°C

EN Enable Threshold

–40°C ≤ TA ≤ +85°C

0.3

0.96

1.5

EN Input Current

VEN1/EN2 = 0V to 6V

–1

µA

Notes:

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

MP2109_PD02_QFN10

TOP VIEW

EN1

FB1

IN2

GND2

SW2

SW1

GND1

IN1

FB2

EN2

EXPOSED PAD

ON BACKSIDE

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