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

●Pin Description
●Block Diagram
© 2011 ROHM Co., Ltd. All rights reserved.
BD9775FV
www.rohm.com
10
11
12
13
14
1
2
3
4
5
6
7
8
9
Fig.1 Pin Description
FB1
INV1
DTC2
CTL1
CTL2
Fin
VCC
RT
CT
GND
VREF
FB 2
DTC1
INV2
Fig.2 Block Diagram
VREGA
VREGB
OUT2H
PVCC2
OUT2L
PVCC1
PGND
OUT1
SYNC
CL2
VS2
SCP
VS1
CL1
18
28
27
26
25
24
23
22
21
20
19
17
16
15
●Pin No. / Pin Name
No.
Pin
10
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
11
1
2
3
4
5
6
7
8
9
4/14
VREGA Connected capacitor for internal regulator
VREGB Connected capacitor for internal regulator
PVCC2
OUT2H High-side gate driver output pin(Channel 2)
PVCC1
OUT2L
PGND
Name
VREF
SYNC
OUT1
DTC1
DTC2
CTL1
CTL2
INV1
GND
INV2
VCC
SCP
VS2
VS1
FB1
FB2
CL2
CL1
FIN
Pin
CT
RT
Error amplifier negative input pin(Channel 1)
Oscillator frequency adjustment pin
connected resistor
Oscillator frequency adjustment pin
connected capacitor
Oscillator synchronization pulse signal input pin
Low-noise ground
Reference voltage output pin
Maximum duty and soft start adjustment pin
(Channel 1)
Maximum duty and soft start adjustment pin
(Channel 2)
Error amplifier negative input pin(Channel 2)
Error amplifier output pin(Channel 2)
Main power supply pin
Synchronous rectification timing adjustable pin
Power ground
(connected low-side gate driver and digital ground)
Low-side ( synchronous rectifier ) gate driver
output pin(Channel 2)
Delay time of short circuit protection adjustment
pin connected capacitor
Over current detection voltage monitor pin
(connected FET drain, Channel 2)
Over current detection voltage adjustment pin
connected capacitor and resistor(Channel 2)
High-side gate driver power supply input
(Channel 2)
High-side gate driver output pin(Channel 1)
High-side gate driver power supply input
(Channel 1)
Over current detection voltage adjustment pin
connected capacitor and resistor(Channel 1)
Over current detection voltage monitor pin
(connected FET drain, Channel 1)
Error amplifier output pin(Channel 1)
Enable/stand-by control input(Channel 1)
Enable/stand-by control input(Channel 2)
Description
Technical Note
2011.05 - Rev.A