BD9639MWV_16 Datasheet, PDF (10/26 Pages) Rohm – Switching Regulator ICs

BD9639MWV
(6) CH2
(a) Function
Synchronous rectification buck DC/DC converter with built in power MOS output stage.
Output voltage ranges from 1.05[V] to 1.80[V].
V^OO^UU^TT² 2
R21
C23
FB2
R22
0.4[V]
SAW
PRE
DRIVER
VBAT2
SW2
PGND2
VBAT
C22
VOOUUTT22
L21
C21
(b) Recommended External Components
Parts
name
Value
Maker
Part number
R21 Refer to right table
-
-
R22 Refer to right table
-
-
C21
22[µF]
Taiyo Yuden JMK212BJ226MG
C22
10[µF]
Taiyo Yuden JMK212BJ106KG
C23
33[pF]
Taiyo Yuden UMK105CH330JV
L21
2.0[µH]
TOKO
A915AY-2R0M
OUT2
Set external
R21
R22
1.1[V]
100[kΩ]
56[kΩ] + 1.1[kΩ]
1.2[V]
100[kΩ]
20[kΩ] + 30[kΩ]
(c) Start-up Sequence
VBAT2
VBAT4
2.5[V] to5.5[V]
H input voltage
XSHDN1
XSHDN 24
0[V]
OUT2
0[V]
H input voltage
5.00[ms]
1.05[V] to1.80[V]
Soft start period
1.00[ms]
Discharge
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TSZ22111・15・001
10/22
TSZ02201-0313AA400630-1-2
09.Feb.2016 Rev.001