BD9634GU Datasheet, PDF (13/30 Pages) Rohm – Switching Regulator ICs

BD9634GU
【CH5】
・Function
Boost/Buck selectable DC/DC converter.
Output voltage is selectable: 5.0[V] /1.8[V] (TYP).
VOUT5
R3 C4
AMPOUT5
R1
FB5
C3 R4
R2
1.0[V]
SEL5
Boost/Buck
PWMCOMP
SAW
PRE
DRIVER
MAX.
DUTY
VBAT
L1
OUT5
C2
Boost setting
VOUT5
C1
US1
OUT5
VOUT1
US1 C2
Buck setting
VOUT5
C1
・Recommended External
Value
Parts name
Boost setting
Output=4.8[V]
Buck setting
Output=1.8[V]
R1
91[KΩ]
R2
24[KΩ]
R3
2[KΩ]
R4
10[KΩ]
C1
22[μF]
C２
1[μF]
C3
100[pF]
C4
2.2[nF]
L1
1.5[μH]
US1 ^(Note)
-
(Note) Depends on output load current.
24[KΩ]
30[KΩ]
1[KΩ]
62[KΩ]
22[μF]
10[μF]
100[pF]
10[nF]
1.8[μH]
-
Maker
-
-
-
-
Taiyo Yuden
Taiyo Yuden
Taiyo Yuden
Taiyo Yuden
sumida
ROHM
・Start-up Sequence
Part number
Boost setting
Output=4.8[V]
Buck setting
Output=1.8[V]
-
-
-
-
-
-
-
-
JMK212BJ226MG
JMK212BJ226MG
JMK105BJ105KV
JMK212BJ106KG
TMK063CH101JP
TMK063CH101JP
LMK063BJ222KP
LMK063BJ103KP
CDRH2D14NP-1R5NC CDRH2D14NP-1R8NC
US5U1/QS5U12
US5U29
VOUT5  ^{R1 R2} 1.0[V]
R2
VBAT
0[V]
2.5[V] to 5.5[V]
PWM/PFM
0[V]
XSHDN5
0[V]
H input voltage
H input voltage
VOUT5
(Boost)
0[V]
≈VBAT[V]
5.0[V]
Discharge by load
VOUT5
(Buck)
0[V]
ON-delay SOFT
Soft start period
5.3[ms]
1.8[V]
Soft start period
5.3[ms]
Discharge by load
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TSZ22111・15・001
13/26
TSZ02201-0313AA400620-1-2
26.Apr.2016 Rev.001