BD8964FVM-TR Rohm Semiconductor, BD8964FVM-TR Datasheet - Page 11

• Manufacturer Part Number: BD8964FVM-TR
• Description: IC SWITCHING REG W/MOSFET MSOP8
• Manufacturer: Rohm Semiconductor
• Series: -r
• Type: Step-Down (Buck), PWM - Current Moder

Specifications of BD8964FVM-TR

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1 V ~ 1.8 V
• Current - Output: 1.2A
• Frequency - Switching: 1MHz
• Voltage - Input: 4 V ~ 5.5 V
• Operating Temperature: -25°C ~ 85°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

●BD8964FVM Cautions on PC Board layout
●Recommended components Lists on above application
●I/O equivalence circuit
© 2009 ROHM Co., Ltd. All rights reserved.
BD8964FVM
www.rohm.com
* The parts list presented above is an example of recommended parts. Although the parts are sound, actual circuit characteristics should be checked on your
application carefully before use. Be sure to allow sufficient margins to accommodate variations between external devices and this IC when employing the
depicted circuit with other circuit constants modified. Both static and transient characteristics should be considered in establishing these margins. When
switching noise is substantial and may impact the system, a low pass filter should be inserted between the VCC and PVCC pins, and a schottky barrier diode
established between the SW and PGND pins.
・ADJ pin
Symbol
・EN pin
C
R
①
②
③
C
C
L
ITH
ITH
ADJ
IN
O
EN
For the sections drawn with heavy line, use thick conductor pattern as short as possible.
Lay out the input ceramic capacitor CIN closer to the pins PVCC and PGND, and the output capacitor Co closer
to the pin PGND.
Lay out CITH and RITH between the pins ITH and GND as near as possible with least necessary wiring.
Coil
Ceramic capacitor
Ceramic capacitor
Ceramic capacitor
Resistance
V
CC
Part
R
C
③
ITH
ITH
10kΩ
1
2
3
4
V
V
V
V
ADJ
V
ITH
GND
OUT
OUT
OUT
OUT
Fig.33 I/O equivalence circuit
CC
Fig.32 Layout diagram
=1.0V
=1.2V
=1.5V
=1.8V
1000pF
4.7μH
Value
10μF
10μF
11/13
4.3kΩ
6.8kΩ
9.1kΩ
12kΩ
・SW pin
・ITH pin
PGND
PV
SW
EN
ITH
CC
Manufacturer
8
7
6
5
SW
Kyocera
Kyocera
Sumida
murata
ROHM
ROHM
ROHM
ROHM
TDK
C
②
IN
L
PV
EN
V
CC
CC
PV
C
VLF5014AT-4R7M1R1
CC
CM316X5R106K10A
CM316X5R106K10A
o
GRM18series
MCR10 4301
MCR10 6801
MCR10 9101
MCR10 1202
CMD6D11B
PV
Series
CC
①
Technical Note
2009.05 - Rev.A
V
GND
CC
V
OUT