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AS3715 датащи(PDF) 31 Page - ams AG

номер детали AS3715
подробное описание детали  Dual Power Path PMIC
PDF  160 Pages
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производитель  AMSCO [ams AG]
домашняя страница  http://www.ams.com
Logo AMSCO - ams AG

AS3715 датащи(HTML) 31 Page - ams AG

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ams Datasheet, Confidential
Page 31
[v1-00] 2014-Sep-10
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AS3715 − Detailed Description – Power Management Functions
Figure 31:
LDO External Components
LDO External Components: Shows the external component parameter of the linear regulators.
Low Power LDO V2_5 Regulator
Description
The low power LDO V2_5 is needed to supply the chip core
(analog and digital) of the device. It is designed to get the
lowest possible power consumption, and still offering
reasonable regulation characteristics. The regulator has three
supply inputs selecting automatically the higher one. This gives
the possibility to supply the chip core either with the VIBAT,
VEBAT, VSUP or VUSBx depending on the conditions. Bulk switch
comparators are used to avoid any parasitic current flow. To
ensure high PSRR and stability, a low-ESR ceramic capacitor of
min. 0.7μF must be connected to the output.
Parameter
Figure 32:
Low Power LDO Parameter
Low Power LDO Parameter: Shows the key electrical parameter of the low power V2_5 linear regulator.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
COUT_LDO3-8
Output capacitor
Ceramic X5R or X7R
0.7
μF
CVIN_LDO3-8
Input capacitor
Ceramic X5R or X7R
1
μF
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Supply voltage rage
see VIBAT, VEBAT, VSUP, VUSB1 or VUSB2
RON
ON resistance
Guaranteed per design
50
Ω
IOFF
Shut down current
100
nA
IVDD
Supply current
Guaranteed per design, consider chip
internal load for measurements.
3μA
tSTART
Startup time
200
μs
VOUT
Output voltage
2.4
2.5
2.6
V
IOUT
Output current
VSUP>3.0V in power_off mode
3
mA



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