BD9639MWV_16 Datasheet, PDF (8/26 Pages) Rohm – Switching Regulator ICs

BD9639MWV
(4) CH1
(a) Function
Selectable PWM/PFM boost DC/DC converter.
Output voltage is ranges from 3.7[V] to 5.5[V].
Low voltage operation starts up from 2.5[V] and also provides supply voltage to VREF circuit.
V^OO^UU^TT¹ 1
R11
C13 _FB1
R12
0.4[V]
PFM
PWM
PRE
DRIVER
PWM/PFM
M_MA_AXX.
DUTY
Start up circuit
VOOUUTT1 1
SW1
PGND1
VBAT
VBAT
D11
VOUTT11
C11
L11
C12
VBAT
C14 ^R13
(b) Recommended External Components (At the time of setting when VOUT1=5.0V)
Parts Name
Value
Maker
Part Number
R11
620[kΩ] +24[kΩ]
-
-
R12
56[kΩ]
-
-
R13
10[Ω]
-
-
C11
22[µF] (x2)
Taiyo Yuden
JMK212BJ226MG
C12
10[µF]
Taiyo Yuden
JMK212BJ106KG
C13
100[pF]
Taiyo Yuden
UMK1005CH101JV
C14
1[µF]
Taiyo Yuden
JMK105BJ105KV
L11
2.2[µH]
Taiyo Yuden
NR4018T2R2N
D11
-
ROHM
RB060M-30
(c) Start-up Sequence
VBAT
0[V]
XSHDN1
0[V]
2.5[V] to5.5[V]
H input voltage
OUT1
0[V]
≈ VBAT[V]
3.7[V] to5.5[V]
Electricity is discharged
according to the load.
(d) PWM/PFM
XSHDN24
0[V]
Soft start period
H input voltage
OUT1
3.7[V]to 5.5[V]
PFM operation
（Load 5mA or less)
PWM operation
PFM operation
（Load 5mA or less)
Select PWM/PFM (operation of XSHDN=HIGH and XSHDN24) with light load (10mA or less).
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TSZ02201-0313AA400630-1-2
09.Feb.2016 Rev.001