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LP8725TLE-A/NOPB Scheda tecnica(PDF) 10 Page - Texas Instruments

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Il numero della parte LP8725TLE-A/NOPB
Spiegazioni elettronici  LP8725 Power Management Unit for Application or Multimedia Processors and Subsystems
PDF  46 Pages
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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LP8725TLE-A/NOPB Scheda tecnica(HTML) 10 Page - Texas Instruments

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EN
Buck 1
0 1 2 3
Buck 2
tBON
tS
START UP sequence
Timing Code
SHUT DOWN sequence
is in reverse order of START UP sequence
Timing Code
EN
Buck 1
0
1
2
3
Buck 2
LDO1
LDO1
LDO3
LDO3
STANDBY
START UP
tS
tS
tS
tS
tS
tS
tS
tS
tS
tS
tS
SHUT DOWN
STANDBY
IDLE
Note 4
LDO4
LDO4
LDO5
LDO5
LILO 2
LILO 2
LILO 1
LILO 1
4 5 6
6 5 4
LDO2
LDO2
LP8725
SNVS618G – DECEMBER 2009 – REVISED MAY 2013
www.ti.com
Figure 6. LP8725 Startup and Shutdown Sequence if CONFIG=GND, DEFSEL=GND Note 1, Note 2
All timing is typical.
tBON 75 µs - Reference and bias turn ON.
ts Programmable time steps. (Typically 64 µs/step.) Time step accuracy is defined by OSC frequency accuracy.
Note 1 STARTUP and SHUTDOWN sequences are defined by registers. Sequences given here are valid if there the
registers are not rewritten via Serial Interface.
Note 2 The timing showed here define time points when LDOs and BUCK are enabled/disabled. Enabling /disabling
process duration depends on voltages and loading conditions. Buck startup duration is typically 170 µs. LDO startup
duration is typically 35 µs. For details please see LDOs and BUCK Electrical Specifications.
Note 4 At this time point registers are reset to POR default values.
10
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