BU9829GUL-W_10 Datasheet, PDF (4/17 Pages) Rohm – WL-CSP EEPROM family SPI BUS

BU9829GUL-W
Technical Note
●LDO regulator AC operating characteristics
Parameter
Vcc1 Rise Time
LDOEN Wait Time
Symbol
tVCC1
tLDOEN
Min.
-
15
Specification
Typ.
-
-
Max.
5
-
Unit
Test condition
msec VCC1 x 0%→VCC1 x 95% point
msec VCC1 x 0%point→ LDOEN=High
●Output voltage depend on VSET bit
The 2bit data are stored into the VSET memory and output voltage change among VOUT1～VOUT4.
VSET data are Written into non-volatile memory array. Initial VSET data is 1,0 in VSET[1:0] and VOUT is 2.9V.
STEP
VOUT(typ.) [V]
VSET1
VSET0
VOUT1
3.0
1
1
VOUT2
2.9
1
0
VOUT3
2.8
0
1
VOUT4
2.7
0
0
●Input power supply regulation timing
①Using EEPROM PART
In case of using EEPROM part, be sure to raise Vcc1 up to operating voltage. In this time, Vcc2 has no connection with
operating.
Vcc1
EEPREOEPMROM部電源
Power Supply
Vcc2
LDOレギュレータ部電源
LDO regulator
Not
Power Supply
Op^動er^作at^不in^可g
EE^OPR^pO^eM^r動^at作ⁱⁿ可^g 能範囲
Not
O^動p^作er^不at^可ing
EEPOROpMe動ra作tin可g能範囲
Not
動_O作_pe不_ra可_ting
Fig.4 Using EEPROM Part, Regulation Timing
②Using LDO regulator part
In case of using LDO regulator part, be sure to raise Vcc1 and Vcc2 up to operating voltage.
After rising Vcc1, wait 15msec and rising LDOEN.
When LDOEN is raised, Vcc1 must be operating voltage.
tVcc1:MAX 5msec
tVcc1:MAX 5msec
Vcc1
EEPROM
Power Supply
Vcc2
LDO regulator
Power Supply
LDOEN
tLDOEN : MIN 15msec
tLDOEN : MIN 15msec
Not
Operating
Operating
Not
Operating
Operating
Fig.5 Using LDO Regulator Part, Regulation Timing
Not
Operating
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4/16
2010.09 - Rev.A