MP2116 –2A, 6V, 100% DUTY CYCLE SYNCHROOUS STEP-DOWN CONVERTER WITH 0.5A LDO

MP2116 Rev.1.0

www.MonolithicPower.com

12

1/17/2013

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Thermal Dissipation

Power dissipation shall be considered when

both channels of the MP2116 provide maximum

2A switcher output current and 0.5A LDO

output current to the loads at high ambient

temperature. If the junction temperature rises

above 150

°C, the MP2116 two channels will be

shut down.

The junction-to-ambient thermal resistance of

The maximum power dissipation is about 1.6W

when the MP2116 is operating in a 70

°C

ambient temperature environment.

W

6

.

1

W

/

C

50

C

70

C

150

PD

o

o

o

MAX

=

−

=

PC Board Layout

The high current paths (GND, IN1/IN2 and SW1)

should be placed very close to the device with

short, direct and wide traces. Input capacitors

should be placed as close as possible to the

respective IN and GND pins. The external

feedback resistors shall be placed next to the

FB pins. Keep the switching nodes SW1 short

and away from the feedback network

TYPICAL APPLICATION CIRCUITS

MP2116

FB1

EN1

IN1

SW1

IN2

5

9

8

7

10

1

2

3

4

6

FB2

EN2

PWROK

OUT2

GND

OUT2

OPTIONAL

POWER OK