BD9011EKN-E2 Datasheet, PDF (4/29 Pages) Rohm – Dual-output, high voltage, high-efficiency step-down Switching Regulator

●Block diagram (Parentheses indicate VQFP48C pin numbers)
VREG5 24(44)
EXTVCC
22
(41)
5V Reg
STB VCC
10 32
(25) (7)
B.G
RT SYNC
15 16
(33) (34)
SYNC
3.3V Reg
VCCCL2
CL2
BOOT2
OUTH2
SW2
OUTL2
DGND2
FB2
SS2
COMP2
31(5)
30(3)
29(2)
28(1)
27(48)
25(46)
26(47)
21(39)
19(37)
20(38)
UVLO
2.7V
TSD
TSD
OCP
Set
DRV
Reset
VREG5
SW
LOGIC
TSD
UVLO
Q PW M
Reset Set ^COMP
Slope
－ Err Amp
＋
＋
0.8V
UVLO
Ｏ
OSC
OCP
Slope
Set
DRV
Reset
TSD
UVLO
PW M
Q
COMP
Set Reset
SW
LOGIC
Err Amp
0.8V
5(19) VREG33
17(35) _LLM
33(8) VCCCL1
34(10) CL1
35(11) BOOT1
36(12) OUTH1
1(13)
4(17)
3(15)
SW1
VREG5A
OUTL1
2(14) DGND1
6(21) FB1
8(23) SS1
7(22) COMP1
Q
Set
Reset
Sequence DET
Q
Set
Reset
Sequence DET
0.56V
18
(36)
DET2
14
(31)
LOFF
12 11
(27) (26)
(30)
13
(29)
EN2 EN1 (GNDS) GND
0.56V
9
(24)
DET1
Fig-13
●Pin configuration
BD9011EKN（HQFN36V）
27 26 25 24 23 22 21 20 19
OUTH2 28
BOOT2 29
CL2 30
VCCCL2 31
VCC 32
VCCCL1 33
CL1 34
BOOT1 35
OUTH1 36
123456789
18 DET2
17 LMM
16 SYNC
15 RT
14 LOFF
13 GND
12 EN2
11 EN1
10 STB
Fig-14
●PIN function table
Pin
No.
Pin name
1
SW1
2
DGND1
3
OUTL1
4
VREG5A
5
VREG33
6
FB1
7
COMP1
8
SS1
9
DET1
10
STB
11
EN1
12
EN2
13
GND
14
LOFF
15
RT
16
SYNC
17
LLM
18
DET2
19
SS2
20
COMP2
21
FB2
22 EXTVCC
23
－
24
VREG5
25
OUTL2
26
DGND2
27
SW2
28
OUTH2
29
BOOT2
30
CL2
31 VCCCL2
32
VCC
33 VCCCL1
34
CL1
35
BOOT1
36
OUTH1
Function
High side FET source pin 1
Low side FET source pin 1
Low side FET gate drive pin 1
FET drive REG input
Reference input REG output
Error amp input 1
Error amp output 1
Soft start setting pin 1
FB detector output 1
Standby ON/OFF pin
Output 1ON/OFF pin
Output 2ON/OFFpin
Ground
Over current protection OFF latch
function ON/OFF pin
Switching frequency setting pin
External synchronous pulse input pin
Built-in pull-down resistor pin
FB detector output 2
Soft start setting pin 2
Error amp output 2
Error amp input 2
External power input pin
N.C.
FET drive REG output
Low side FET gate drive pin 2
Low side FET source pin 2
High side FET source pin 2
Hi side FET gate drive pin 2
OUTH2 driver power pin
Over current detector setting pin 2
Over current detection VCC2
Input power pin
Over current detection VCC1
Over current detector setting pin 1
OUTH1 driver power pin
High side FET gate drive pin 1
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