AS3701 datasheet(16/110 Pages) AMSOSRAM

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ams Datasheet

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[v1-11] 2016-Dec-14

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AS3701 − Detailed Description – Power Management Functions

Fast Regulation Mode

This mode can be used to react faster on sudden load changes

and thus minimize the over-/undershoot of the output voltage.

This mode needs a 22

μF output capacitor instead the 10μF one

to guarantee the stability of the regulator.

The mode is enabled by setting the bit sd_fast [SD_control1]

to 1.

Selectable Frequency Operation

Especially for very low load conditions, e.g. during a sleep mode

of a processor, the switching frequency can be reduced to

achieve a higher efficiency. The frequency can be set to 1, 2, 3

or 4MHz and this mode is selected by setting sd1_freq

[SD1Voltage] and sd1_fsel [SD_control1] to the appropriate

values.

Parameters

Figure 16:

DCDC Step-Down Converter Electrical Characteristics

Symbol

Parameter

Note

Min

Typ

Max

Unit

VIN

Input Voltage

Pin VSUP

2.7

5.5

VOUT

Regulated Output Voltage

0.6125

3.35

VOUT_TOL

Output Voltage Tolerance

min. 40mV

-3

ILIMIT

Current Limit

800

RPMOS

P-switch ON resistance

0.36

RNMOS

N-switch ON resistance

0.33

fSW

Switching Frequency

MHz

ILOAD

Load Current

500

ISUP_DCDC

Current Consumption

Operating Current

without Load

μA

Shutdown Current

0.1

tMIN_ON

Minimum ON Time

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