MVPG30x/MVPG31
Datasheet
3.3
Programmable Current Limit for the LDO Regulator
Controller
A sense resistor is placed between SVIN and ILIM pin to program the current limit of the LDO
regulator controller. The following equation is used to determine the value of the sense resistor.
50mV(Typical)
RSENSE(mΩ)
---------------------------------------
=
ILIM
When the LDO regulator controller is in current limit, the internal current-limit circuitry turns off the
LDO regulator controller and holds the LDO regulator controller in the off state for 3 ms (typical hold
time). After the hold-time is expired, the LDO regulator controller is enabled. The current-limit
circuitry continues to disable and enable the regulator until the current limit is removed.
The LDO regulator P-channel MOSFET can be selected from the following list based on the required
current and ambient temperature.
Table 10: P-Channel MOSFET Selection
Package
Vishay
Fairchild
Super SOT-6
FDC642P
FDC634P
Super SOT-3 / micro 3
FDN340P
FDN302P
SO-8
Si4433DY
Si3443DV
FDS9431A
FDJ127P
SC75-6 FLMP
2
TO-263AB (D -Pack)
FDP4020P
TSOP-6
SC70-6
FDG330P
SOT-23
Si2333DS
Si5473DC
Si1039X
1206-8 Chip FET
SC-89 (6-lead)
SC75A/SC-89 (3-lead)
Si1012R/X
Doc. No. MV-S102808-00 Rev. G
Page 28
Copyright © 2008 Marvell
April 14, 2008, 2.00
Document Classification: Proprietary
MARVELL [ MARVELL TECHNOLOGY GROUP LTD. ]
