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AS3722 bảng dữ liệu(PDF) 46 Page - ams-OSRAM AG

tên linh kiện AS3722
Giải thích chi tiết về linh kiện  Multi-Phase DCDC Controller PMIC
PDF  199 Pages
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nhà sản xuất  AMSOSRAM [ams-OSRAM AG]
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AS3722 bảng dữ liệu(HTML) 46 Page - ams-OSRAM AG

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ams Datasheet
Page 45
[v1-01] 2015-Sep-07
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AS3722 − Detailed Descriptions- Power Management Functions
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 VBAT,
VSUP or VBAT_BKUP 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 44:
Low Power LDO Parameter
Low Power LDO Parameter: Shows the key electrical parameter of the low power V2_5 linear regulator
Figure 45:
Low Power LDO External Components
Low Power LDO External Components: Shows the external component parameter of the low power V2_5 linear
regulator
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Supply voltage rage
See VBAT, VSUP and
VBAT_BKUP
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
IOUT
Output current
VSUP>3.0V or VBAT>5.7V in
power_off mode
3mA
VOUT
Output voltage
2.4
2.5
2.6
V
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
CV2_5
Output capacitor
Ceramic X5R or X7R
0.7
μF



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