BD9634GU Datasheet, PDF (12/30 Pages) Rohm – Switching Regulator ICs

BD9634GU
【CH4】
・Function
Synchronous rectification cross converter with built-in power MOS output stage.
Output voltage is selectable: 3.25[V]/3.3[V]（TYP）.
VOUT4
Place a resistance to
change setting
voltage by external.
FB4
CTL4
0.4[V]
Buck-Boost
PWMCOMP
SAW
PRE
DRIVER
MAX.
DUTY
VOUT4
USW4
PGND4
VBAT4
DSW4
VOUT4
C1
VBAT
L1
C2
・Recommended External
Parts name
Value
C1
22[μF]
C2
10[μF]
L1
4.7[μH]
Maker
Taiyo Yuden
Taiyo Yuden
sumida
Part number
JMK212BJ226MG
JMK212BJ106KG
CDRH2D14NP-4R7NC
・ Start-up Sequence
VBAT4 ^{2.5[V] to 5.5[V]}
H input voltage
PWM/PFM
XSHDN34
0[V]
VOUT3 0[V]
VOUT4 0[V]
H input voltage
70[%]
1.05[V] to 1.8[V]
3.25[V]/3.3[V]
Soft start period
2.94[ms]
Discharge
・Setting Voltage
It is possible to return in a set voltage by adding external resistance between VOUT4 and FB4.
CTL4=L, OPEN
VOUT4  ^{330.7[kΩ]  ExternalR[kΩ]}  0.4[V]
40.7[kΩ]
CTL4=H
VOUT4  ^{330[kΩ]  ExternalR[kΩ]}  0.4[V]
40[kΩ]
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TSZ22111・15・001
12/26
TSZ02201-0313AA400620-1-2
26.Apr.2016 Rev.001