Data Sheet Rev. B, September 2020 | Subject to change without notice

5 of 16

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ACT4529M

40 V/3.0 A CV/CC Buck Converter Featuring QC2.0, USB Auto-Detect and USB-PD

ELECTRICAL CHARACTERISTICS

(VIN = 12 V, TJ = -40 °C ~ 125 °C, unless otherwise specified.)

PARAMETER

SYMBOL

CONDITION

MIN

TYP

MAX

UNITS

Output Constant Current Limit

Rcs = 20 mΩ

2.95

3.3

3.63

A

Hiccup Waiting Time

4.13

S

Top FET Cycle by Cycle Current

Limit

4.5

5.8

A

Top FET Rds on

70

mΩ

Bot FET Rds on

4.7

Ω

Maximum Duty Cycle

99

%

Switching Frequency

-10%

125

+10%

kHz

Soft-start Time

2.0

ms

Out Voltage Ripples

COUT = 220 uF/22 uF ceramic

80

mV

VOUT Discharge Current

For high to lower voltage transitions

60

mA

Voltage transition time for QC 2.0

transition or USB PD Type C

12 V – 5 V

100

ms

Voltage transition time for QC 2.0

transition or USB PD Type C

5 V – 12 V

100

ms

Line Transient Response

Input 12 V - 40 V - 12 V with 1 V/us slew

rate, VOUT = 5 V, ILOAD = 0 A and 2.4 A

4.75

5.25

V

Load Transient Response

VOUT = 5 V

80 mA - 1.0 A – 80 mA load with 0.1

A/us slew rate

4.9

5.15

5.4

V

VOUT = 9 V

80 mA - 1.0 A – 80 mA load with 0.1

A/us slew rate

8.7

9.1

9.5

V

VOUT = 12 V

80 mA - 1.0 A – 80 mA load with 0.1

A/us slew rate

11.6

12.1

12.6

V

Thermal Shut Down

160

°C

Thermal Shut Down Hysteresis

30

°C

ESD of DP, DM

HBM

8

kV

PDC High Threshold

2.2

V

PDC Low Threshold

0.6

V

PDC Drive Current

10

uA