MPQ4485

– STEP-DOWN CONVERTER WITH DUAL USB CHARGING PORTS

MPQ4485 Rev.1.0

www.MonolithicPower.com

6

9/18/2017

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

© 2017 MPS. All Rights Reserved.

noted.

Parameter

Symbol

Condition

Min

Typ

Max

Units

USB OVP clamp

5.3

5.6

5.9

V

Current limit

-6%

3.55

6%

A

2.6

2.75

2.9

Line drop compensation

40

90

140

mV

1

2

3

ms

Hiccup mode on time

3.5

5

6.5

ms

3

5

7

Hiccup mode off time

1

2

3

s

BC1.2 DCP Mode

DP and DM short resistance

85

155

Ω

85

160

Divider Mode

DP/DM output voltage

2.55

2.7

2.85

V

DP/DM output impedance

14

22

30

k

Ω

12

22

34

1.2V/1.2V Mode

DP/DM output voltage

1.12

1.2

1.28

V

1.1

1.2

1.3

DP/DM output impedance

70

105

140

k

Ω

60

105

150

USB Type-C 5V @ 3A Mode (CC1, CC2)

CC resistor to disable Type-C

mode

CC1 pin, for Type-C mode

application, add a 1nF capacitor

on CC1

70

90

k

Ω

CC voltage to enable VCONN

0.75

V

0.9

2.45

V

CC detach threshold

2.75

V

CC voltage falling debounce

timer

100

144

200

ms

CC voltage rising debounce

timer

10

15

20

ms

VCONN output power

VCONN comes from buck output

with some series resistance,

1

W

POL output low voltage

Pull CC1 to ground with 5.1k

Ω

resistor, POL sink 1mA

150

mV

POL leakage

1

µA