MP1474S – HIGH-EFFICIENCY, 2A, 16V, 500kHz SYNCHRONOUS STEP-DOWN CONVERTER

MP1474S Rev.1.0

www.MonolithicPower.com

4

1/8/2015

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© 2015 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameter

Symbol Condition

Min

Typ

Max

Units

Supply Current (Shutdown)

2

μA

Supply Current (Quiescent)

0.5

1

mA

HS Switch-On Resistance

150

mΩ

LS Switch-On Resistance

70

mΩ

Switch Leakage

1

μA

Current Limit

(6)

Under 40% Duty Cycle

3

A

Oscillator Frequency

410

500

630

kHz

350

650

kHz

Foldback Frequency

0.5

Maximum Duty Cycle

90

95

%

Minimum On Time

(6)

40

ns

Sync Frequency Range

0.3

2

MHz

Feedback Voltage

791

807

823

mV

(7)

787

807

827

Feedback Current

10

50

nA

EN Rising Threshold

1

1.4

1.75

V

EN Falling Threshold

0.9

1.25

1.6

V

EN Input Current

2

μA

0

μA

EN Turn-Off Delay

8

μs

Power-Good Rising Threshold

0.9

Power-Good Falling Threshold

0.85

Power-Good Delay

0.6

ms

Power-Good Sink-Current

Capability

Sink 2mA

0.4

V

Power-Good Leakage Current

1

μA

VIN Under-Voltage Lockout

Threshold—Rising

3.6

3.9

4.3

V

VIN Under-Voltage Lockout

Threshold—Hysteresis

700

mV

VCC Regulator

5

V

VCC Load Regulation

2

%

Soft-Start Period

Vo from 10% to 90%

1.2

ms

Thermal Shutdown

(6)

150

°C

Thermal Hysteresis

(6)

20

°C

Notes:

6) Guaranteed by design.

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