AS3715 datasheet(15/159 Pages) AMSOSRAM

tên linh kiện	AS3715

Giải thích chi tiết về linh kiện	Dual or Single Power Path PMIC

PDF	159 Pages

Scroll/Zoom	100%

nhà sản xuất	AMSOSRAM [ams-OSRAM AG]

Trang chủ	https://ams-osram.com/

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15 / 159 page

Page 14

ams Datasheet

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[v1-03] 2015-Aug-10

AS3715 − Detailed Description – Power Management Functions

Mode Settings

Low Ripple, Low Noise Operation

Bit settings: sdX_low_noise=1

In this mode there is no minimum coil current necessary before

switching OFF the PMOS. As long as the load current is superior

to the ripple current the device operates in continuous mode.

Figure 8:

DC/DC Buck Continuous Mode

DC/DC Buck Continuous Mode: Shows the DC/DC switching waveforms of SD3 at about 500mA.

When the load current gets lower, the discontinuous mode is

triggered. As result, the auto-zero comparator stops the NMOS

conduction to avoid load discharge and the duty cycle is

reduced down to tmin_on to keep the regulation loop stable.

This results in a very low ripple and noise, but decreased

efficiency, at light loads, especially at low input to output

voltage differences.

Figure 9:

DC/DC Buck Dis-Continuous Mode

DC/DC Buck Dis-Continuous Mode: Shows the DC/DC switching waveforms of SD3 at about 60mA.

AS3715 bảng dữ liệu(PDF) 15 Page - ams-OSRAM AG