MP1475 – SYNCHRONOUS STEP-DOWN CONVERTER

MP1475 Rev. 1.01

www.MonolithicPower.com

3

4/3/2014

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© 2014 MPS. All Rights Reserved.

Parameter

Symbol

Condition

Min

Typ

Max

Units

Supply Current (Shutdown)

7

μA

Supply Current (Quiescent)

0.6

1

mA

HS Switch-On Resistance

80

mΩ

LS Switch-On Resistance

30

mΩ

Switch Leakage

1

μA

Current Limit

(6)

Under 40% Duty Cycle

4.2

5

A

Oscillator Frequency

430

500

570

kHz

Fold-Back Frequency

0.25

Maximum Duty Cycle

90

95

%

Minimum On Time

(6)

40

ns

Sync Frequency Range

0.2

2

MHz

791

807

823

Feedback Voltage

(7)

787

807

827

mV

Feedback Current

10

50

nA

EN Rising Threshold

1.2

1.4

1.6

V

EN Falling Threshold

1.1

1.25

1.4

V

2

μA

EN Input Current

0

μA

EN Turn-Off Delay

5

μs

Power-Good Rising Threshold

0.9

Power-Good Falling Threshold

0.85

Power-Good Delay

0.4

ms

Power-Good Sink Current

Capabilily

Sink 4mA

0.4

V

Power-Good Leakage Current

1

μA

VIN Under-Voltage Lockout

Threshold-Rising

3.7

3.9

4.1

V

VIN Under-Voltage Lockout

Threshold-Hysteresis

650

mV

VCC Regulator

5

V

VCC Load Regulation

3

%

Soft-Start Period

1.2

ms

Thermal Shutdown

(6)

150

°C

Thermal Hysteresis

(6)

20

°C

Notes:

6) Guaranteed by design.

7) Not tested in production and guaranteed by over-temperature correlation.