MP2918

—4V TO 40V SYNCHRONOUS STEP-DOWN CONTROLLER

MP2918 Rev. 1.02

www.MonolithicPower.com

4

5/31/2017

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© 2017 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max

Units

Input Supply

4

4.5

5

V

3.2

3.7

3.95

V

800

mV

bias

VCC2 = 12V, external bias,

SENSE+ = SENSE- = 0V,

no switching

25

40

μA

VCC2 bias

= 0V, no switching

750

1000

μA

SENSE- = 12V, no switching

250

350

μA

0.5

5

μA

VCC Regulator

VCC1 regulator output voltage

VIN > 6V, load = 0 to 50mA

4.5

5

5.5

V

VCC1 regulator load

Load

=

0

to

50mA,

VCC2

floating or connected to SGND

1

3

%

VCC1 regulator output voltage

from VCC2

VCC2 > 6V

5

V

VCC1 regulator load

regulation from VCC2

Load = 0 to 50mA, VCC2 = 12V

1

3

%

VCC2 UVLO threshold (rising)

4.3

4.7

4.92

V

4.05

4.45

4.75

V

VCC2 threshold hysteresis

250

mV

VCC2 supply current

SENSE+ = SENSE- = 12V,

VCC2 = 12V, no switching

800

1100

μA

SENSE+ = SENSE- =12V,

VCC2 = 12V, no switching

200

300

μA

Feedback (FB)

Feedback voltage

4V

 V

0.788

0.800

0.812

V

Feedback current

10

nA

Enable (EN/SYNC)

Enable threshold (rising)

1.16

1.22

1.28

V

Enable threshold (falling)

1.03

1.09

1.15

V

Enable threshold hysteresis

130

mV

Enable input current

2

5

μA

Enable turn-off delay

10

20

40

μs