BD9634GU Datasheet, PDF (7/30 Pages) Rohm – Switching Regulator ICs

BD9634GU
Function Description
【Features Summary】
CH
Function
CH1
Boost converter
CH2
LDO
CH3
Buck converter
CH4 Buck-Boost converter
CH5 Boost/Buck converter
CH6
Boost
CH7
Boost
CH8
Reverse
CH9
LDO
Output voltage (TYP)
3.7[V] to 5.5[V]
I/O voltage differential
over 0.2[V]
1.05[V] to 1.8[V]
3.25[V]/3.3[V]
5.0[V]/1.8[V]
6[V] to 16[V]
12[V] to 14.5[V]
-7.5[V] to -6[V]
I/O voltage differential
over 0.2[V]
Power output
External
Embedded
Embedded
Embedded
External
External
Embedded
External
Embedded
Setting res.
USE
External Startup ch,Motor
External
Analog
External
Embedded
External
External
External
External
Core
Digital
CMOS,Memory
LED
CCD
CCD
Embedded
Analog
【CONTROL】
・Stand-by function related terminals
Following table shows start-up condition of each block.
XSHDN
1
PWM
/PFM
XSHDN
2
XSHDN
34
XSHDN
5
XSHDN
6
XSHDN
78
XSHDN
9
CH1
Internal
supply
RAMP
SAW
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CH9
L
-
-
-
-
-
-
-
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
L
-
-
-
-
-
L
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
L
-
-
-
-
-
H
OFF
OFF
OFF
OFF
OFF
ON
L
L
L
L
L
L
OFF
OFF
OFF
OFF
OFF
OFF
H
L
L
L
L
L
ON
OFF
OFF
OFF
OFF
OFF
H
L
H
L
L
L
L
ON
OFF
ON
OFF
OFF
OFF
OFF
ON
ON
H
L
L
H
L
L
L
OFF
OFF
ON
OFF
OFF
OFF
L
L
L
H
L
L
OFF
OFF
OFF
ON
OFF
OFF
L
L
L
L
H
L
OFF
OFF
OFF
OFF
ON
OFF
L
L
L
L
L
H
(Note) PWM/PFM logic refer to the table below.
(Note) -symbol mean without conditions.
OFF
OFF
OFF
OFF
OFF
ON
・Other setting terminals
Terminal
PWM/PFM H：PWM operation
VOUT4
CTL4
H
L
3.30[V]
3.25[V]
SEL5
CONT78
H：Buck setting
H：CH7,CH8
startup synchronous
Function
L：PFM operation
（Note）Latch logic at CH4 startup
L：Boost setting
（Note）H input voltage is VOUT1 output voltage
L：CH7→CH8 startup （Note）Logic after some [us] from rising edge of XSHDN78
・XSHDN2 to XSHDN9, PWM/PFM, CTL4 terminal equivalent circuit
VBAT
VBAT
30[kΩ]
400[kΩ]
(100[kΩ])
AGND
100[kΩ] is only for CTL4 terminal.
XSHDN1,SEL5,CONT7 terminal is not
Pulled-down, so VBAT input and GND
input is needed.
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TSZ22111・15・001
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TSZ02201-0313AA400620-1-2
26.Apr.2016 Rev.001