AS3722 datasheet(28/199 Pages) AMSOSRAM

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ams Datasheet

Page 27

[v1-01] 2015-Sep-07

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AS3722 − Detailed Descriptions- Power Management Functions

Figure 19:

DC/DC Buck Converter SD2+SD3 & SD4+SD5 Mode

Parameter

Figure 20:

DC/DC Buck Converter Parameter

DC/DC Buck Slave Operation: Shows

the internal DC/DC buck converters with

SD3 operating as slave of SD2 and SD5

operating as a slave from SD4 to increase

the output current.

(sd3_slave = 1 & sd5_slave=1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VIN

Input voltage

Pin VSUP_SDx

2.7

5.5

VOUT

Regulated output voltage

0.6125

3.35

VOUT_tol

Output voltage tolerance

min. 30mV

-3

ILOAD_SD2

Load current SD2

VSD2 ≤1.8V

VSD2 >1.8V

ILOAD_SD3

Load current SD3

VSD3 ≤1.8V

VSD3 >1.8V

1.5

ILOAD_SD45

Load current SD4,5

VSD4/5 ≤1.8V

1.5

VSD4/5 >1.8V

ILIMIT

Current limit

SD2 (sd2_hicurr=1)

SD3

2.5

VSUP_SD2

LX_SD2

FB_SD2

VSS_SD2

VSUP_SD3

LX_SD3

FB_SD3

PVSS_SD3

0.47uH

47uF

VSD2 (4.5-6A)

12.5mV steps

4.7uF

VSUP_SD4

LX_SD4

FB_SD4

VSS_SD4

1uH

22uF

VSD4 (2-3A)

12.5mV steps

4.7uF

VSUP_SD5

LX_SD5

FB_SD5

VSS_SD5

DCDC2

0.6V-3.3V

3-4A

DCDC3

0.6V-3.3V

1.5-2A

DCDC4

0.6V-3.3V

1-1.5A

DCDC5

0.6V-3.3V

1-1.5A

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