Page 6

ams Datasheet

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[v1-03] 2015-Sep-28

AS3729B − 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 DC/DC Power Stage. VSUP =

3.8V, TA = 25°C (unless otherwise specified)

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

1. Maximum value only for pulsed peak current

2. MOS transistor only without package parasitic

Symbol

Parameter

Note

Min

Typ

Max

Unit

VIN

Input voltage

Pin VSUPx

2.5

5.5

V

Pin CTRLx

0

5.5

V

Pin TEMP

0

3.6

V

ILIMIT

Peak coil current limit

Single phase

4.8

A

ILOAD

Load current

single phase

Continuous load

current

03

A

Peak load current

4 (1)

RPMOS

P-switch ON

resistance (2)

Single phase

40

70

mΩ

RNMOS

N-switch ON

resistance (2)

Single phase

20

35

mΩ

fSW

Switching frequency

Supplied by DC/DC

controller

1.3

3

MHz

IQ_force_PWM

Quiescent current PWM

TEMP pin high, force

PWM mode active

6.2

mA

IQ_low_power

Quiescent current LP

TEMP pin high, low

power mode active

21

μA

Ipower_off

Power-Off current

No current into pin

TEMP

±1

μA

Rdischarge

Active discharge

Single phase

16

Ω

Electrical Characteristics