MP4470/4470A–HIGH-EFFICIENCY, FAST-TRANSIENT, SYNCHRONOUS, STEP-DOWN CONVERTER

MP4470/4470A Rev. 1.1

www.MonolithicPower.com

3

8/26/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2013 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameters

Symbol

Condition

Min

Typ

Max

Units

Supply Current (Shutdown)

10

200

nA

Supply Current (Quiescent)

500

600

μA

HS Switch On Resistance

40

55

mΩ

LS Switch On Resistance

(5)

20

mΩ

Switch Leakage

10

200

nA

Current Limit

6

8

A

One-Shot On Time

230

280

330

ns

Minimum Off Time

(5)

100

ns

Foldback Off Time

(5)

4.8

μs

Foldback Off Time

(5)

16.8

μs

OCP Hold-Off Time

(5)

100

μs

Feedback Voltage

807

815

823

mV

Feedback Current

10

50

nA

Soft-Start Charging Current

6

8.5

11

μA

Power-Good Rising Threshold

0.87

0.9

0.93

Power-Good Falling Threshold

0.82

0.85

0.88

Power-Good Threshold Hysteresis

0.05

Power-Good Rising Delay

500

700

900

μs

EN Rising Threshold

1.1

1.25

1.4

V

EN Falling Threshold

0.8

0.86

0.92

V

EN Threshold Hysteresis

390

mV

EN Input Current

1.5

2

μA

Threshold Rising

3.7

4.0

4.3

V

Threshold Hysteresis

880

mV

4.5

4.85

5.2

V

1

%

Vo Over-Voltage Protection

Threshold

(6)

1.25

Thermal Shutdown

(5)

175

°C

Thermal Shutdown Hysteresis

(5)

45

°C

Note:

5) Derived from bench characterization, not tested in production.

6)

For MP4470 only. MP4470A has no OVP function.