BD9533EKN_08 Datasheet, PDF (7/21 Pages) Rohm – Switching Regulators for DDR-SDRAM Cores

●Block Diagram
2 ^VCC
5 ^VIN
VREG
19
SS
16
EN
4
Reference
Block
VREG
VIN
UVLO
SCP
7
REF×0.7
SS×0.7
VOUT
REF
20
SCP
SCP
H³Reg^TM
Controller
Block
VOUT
18
SS
+
+
Thermal
Protection
UVLO
TSD ILIM
SCP
TSD
2.5VReg
2.5V
REF×1.2
VOUT
SS
Soft Start Block
OVP
R
Q
SLLM
S
SLLM
Current Limit
ILIM
-
+
Driver
Circuit
BOOT
15
14
HG
13
SW
VDD ₁₂
11
LG
10
PGND
EN/UVLO
VDD
VIN
VOUT
1
GND
17
FS
6
3
SLLM ILIM
Is+ ^{9 8} Is-
●PHYSICAL DIMENSIONS
BD9533
1PIN MARK Lot No.
(UNIT：mm)
HQFN20V
※ Mounting is not recommended to the dotted line part.
●Pin Number・Pin Name
Pin
No.
Pin Name
1
GND
2
VCC
3
ILIM
4
EN
5
VIN
6
SLLM
7
SCP
8
IS-
9
IS+
10
PGND
11
LG
12
VDD
13
SW
14
HG
15
BOOT
16
SS
17
FS
18
VOUT
19
VREG
20
REF
-
FIN
Please short FIN to the 1PIN
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