BD8964FVM-TR Rohm Semiconductor, BD8964FVM-TR Datasheet - Page 5

• 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

●Information on advantages
© 2009 ROHM Co., Ltd. All rights reserved.
BD8964FVM
www.rohm.com
Advantage 1：Offers fast transient response with current mode control system.
Advantage 2： Offers high efficiency with synchronous rectifier
・For heavier load:
Advantage 3：・ Supplied in smaller package due to small-sized power
R
C
ITH
ITH
Utilizes the synchronous rectifying mode and the low on-resistance
MOS FETs incorporated as power transistor.
V
Conventional product (Load response I
I
OUT
OUT
ON resistance of P-channel MOS FET : 350mΩ(Typ.)
ON resistance of N-channel MOS FET : 250mΩ(Typ.)
Reduces a mounting area required.
Convertor
Controller
DC/DC
MOS FET incorporated.
V
CC
・Output capacitor Co required for current mode control: 10μF ceramic capacitor
・Inductance L required for the operating frequency of 1 MHz: 4.7μH inductor
Voltage drop due to sudden change in load was reduced
L
Cin
Fig.17 Comparison of transient response
Co
110mV
O
V
Fig.19 Example application
=0.1A→0.6A)
OUT
5/13
V
I
OUT
OUT
BD8964FVM (Load response I
10mm
100
90
80
70
60
50
40
30
20
10
R
C
0
ITH
ITH
1
【V
15mm
OUT
C
C
IN
O
OUTPUT CURRENT:I
=1.5V】
10
Fig.18 Efficiency
L
100
O
=0.1A→0.6A)
Technical Note
2009.05 - Rev.A
58mV
VCC=5V
Ta=25℃
OUT
1000
[mA]
10000