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AS3715 Datasheet(PDF) 18 Page - ams-OSRAM AG

Part # AS3715
Description  Dual or Single Power Path PMIC
PDF  159 Pages
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Manufacturer  AMSOSRAM [ams-OSRAM AG]
Direct Link  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3715 Datasheet(HTML) 18 Page - ams-OSRAM AG

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ams Datasheet
Page 17
[v1-03] 2015-Aug-10
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AS3715 − 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 bigger output capacitor to guarantee the
stability of the regulator. The mode is enabled by setting
sdX_fast =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 for SD1 can be set to
3 or 4MHz. SD2 and SD3 have a 2, 3 or 4MHz mode. This mode
is selected by setting sdX_freq and sdX_fsel to the appropriate
values.
100% PMOS ON Mode for Low Dropout Regulation
For low input to output voltage difference the DCDC converter
can use 100% duty cycle for the PMOS transistor, which is then
in LDO mode.
Step-Down Converter Configuration Modes
The step down dc/dc converters have two configuration modes
to deliver different output currents for the applications. The
operating mode is selected by setting the bit sd2_slave,
sd3_slave (the default is set by the Boot-OTP)
Parameter
Figure 13:
DC/DC Buck Converter Parameter
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VIN
Input voltage
Pin VSUP_SDx
2.7
5.5
V
VOUT
Regulated output voltage
0.6125
3.35
V
VOUT_tol
Output voltage tolerance
min. ±30mV
-3
3
%
ILOAD_SD23
Load current SD2, 3
VSD2, 3 <1.8V
0
1
A
VSD2, 3 >1.8V
0
0.7
A
ILOAD_SD1
Load current SD1
VSD1 <1.8V
0
2
A
VSD1 >1.8V
0
1.2
A
ILIMIT
Current limit
SD2, 3
1.2
A
SD1
2.5
A
RPSW
P-Switch ON resistance
incl. bonds, substrate, etc
SD2, SD3; VSUP_SDx=3.0V
250
500
mΩ



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