MP8845C – 5A HIGH EFFICIENT SYNC. STEP DOWN SWITCHER WITH I2C

MP8845C Rev. 1.02

www.MonolithicPower.com

3

4/25/2014

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ELECTRICAL CHARACTERISTICS

Parameter

Symbol Condition

Min

Typ

Max

Units

Input Voltage Range

2.7

6

V

Quiescent Current

(5)

Io=0A, switching, PWM mode

18

mA

Shut Down Current

10

μA

Internal Reference Voltage

0.594

0.6

0.606

V

Lowest Output Voltage

Register = 00h

0.594

0.6

0.606

V

Highest Output Voltage

Register = 7Fh

1.435

1.45 1.465

V

Output Voltage Step

6.69

mV

High Side Switch On Resistance

32

mΩ

Low Side Switch On Resistance

17

mΩ

UVLO Rising Threshold

2.45

2.55

V

UVLO Hysteretic

200

mV

Switching Frequency Range

1

2.2

MHz

Frequency Variation

20%

Minimum On Time

(5)

60

ns

Switch Leakage

1

uA

EN leakage Current

1

uA

EN pull up resistance

1

MOhm

EN Logic Low Voltage

0.4

V

EN Logic High Voltage

1.8

V

High Side Switch Peak Current

Limit (source)

6

7.5

9

A

High Side Switch Valley Current

Limit

(5)

5.8

A

Low Side Switch Current Limit

(sink)

(5)

-5

A

Soft-Start Time

target value

0.4

ms

Thermal Warning

(5)

130

°C

Thermal Shutdown

(5)

150

°C

DAC Resolution

7

Bits

Note:

5) Not production tested; guaranteed by design.