BD9775FV-E2 Rohm Semiconductor, BD9775FV-E2 Datasheet - Page 4

• Manufacturer Part Number: BD9775FV-E2
• Description: IC REG SW STEP DOWN HE 28-SSOP
• Manufacturer: Rohm Semiconductor
• Type: Step-Down (Buck)r

Specifications of BD9775FV-E2

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Current - Output: 400mA
• Frequency - Switching: 100kHz
• Voltage - Input: 6 ~ 30 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Power - Output: 640mW
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: BD9775FV-E2TR

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