Page 6

ams Datasheet

Document Feedback

[v1-03] 2015-Aug-31

AS3728 − Electrical Characteristics

All limits are guaranteed. The parameters with min and max

values are guaranteed with production tests or SQC (Statistical

Quality Control) methods.

Figure 6:

Electrical Characteristics

Electrical Characteristics: Shows the Electrical Characteristics of the Step Down DCDC Power Stage.

HVSUP = 5VSUP = 5.0V, TA = 25°C (unless otherwise specified)

Note(s) and/or Footnote(s):

1. Maximum value only for pulsed peak current

2. MOS transistor and package parasitic

Symbol

Parameter

Min

Typ

Max

Units

Note

VIN

Input Voltage

4.5

12

14

V

Pin HVSUP

4.5

5.5

V

Pin 5VSUP

05.5

V

Pin CTRLx

03.6

V

Pin TEMP

ILIMIT

Peak coil current limit

5.6

A

Single phase

ILOAD

Load current

Single phase

03

A

Continuous load current

4 (1)

Peak load current

RHS-NMOS

N-switch ON resistance (2)

115

180

mΩ

Single phase

RLS-NMOS

N-switch ON resistance (2)

30

40

mΩ

Single phase

fSW

Switching frequency

1.3

3

MHz

Supplied by DCDC

controller

IQ_HVSUP

Quiescent current into

HVSUP

2μA

TEMP pin high, CTRLx

pin high

IQ_5VSUP

Quiescent current into

5VSUP

20

60

μA

TEMP pin high, CTRLx

pin high

Ipower_off

Power-Off current

into HVSUP or 5VSUP

1μA

No current into pin TEMP

Rdischarge

Active discharge

28

Ω

Single phase

Electrical Characteristics