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AS3715 データシート(PDF) 14 Page - ams-OSRAM AG

部品番号 AS3715
部品情報  Dual or Single Power Path PMIC
PDF  159 Pages
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メーカー  AMSOSRAM [ams-OSRAM AG]
ホームページ  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3715 データシート(HTML) 14 Page - ams-OSRAM AG

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ams Datasheet
Page 13
[v1-03] 2015-Aug-10
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AS3715 − Detailed Description – Power Management Functions
DCDC Step-Down Converter
Description
The step-down converter is a high efficiency fixed frequency
current mode regulator. By using low resistance internal PMOS
and NMOS switches efficiency up to 95% can be achieved. The
fast switching frequency allows using small inductors, without
increasing the current ripple. The unique feedback and
regulation circuit guarantees optimum load and line regulation
over the whole output voltage range, up to an output current
of 2A (SD1), and 1A for (SD2, SD3), with an output capacitor of
only 8μF - 12μF. The implemented current limitation protects
the DCDC and the coil during overload condition.
Figure 7:
Step-Down DC/DC Converter Block Diagram
DCDC Step-Down Converter Block Diagram: Shows the internal structure of the DCDC bucks.
Detailed Description – Power
Management Functions
Logic
+
Σ
IMIN
ILIMIT
250/600mA
1.2/2.5A
ISENSEP
ISENSEN
Zero
Comparator
PWM
Comparator
Overvoltage
Comparator
Ref + 8%
Ref - 5%
Slope
Compensation
Softstart
Ref = 0.6V
Skip
sdX_low_noise
clk
sdX_lv
sdX_vsel
FB_SDx
VSS_SDx
LX_SDx
VOUT
VSUP_SDx
CVSUP_SDx
LSDx
COUT_SDx



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