BD9007F-E2 Rohm Semiconductor, BD9007F-E2 Datasheet - Page 9

• Manufacturer Part Number: BD9007F-E2
• Description: IC REG SW 2A FLEX STEPDOWN 8-SOP
• Manufacturer: Rohm Semiconductor
• Type: Step-Down (Buck)r

Specifications of BD9007F-E2

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1 ~ 35 V
• Current - Output: 2A
• Frequency - Switching: 50kHz ~ 500kHz
• Voltage - Input: 7 ~ 35 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOP
• Power - Output: 690mW
• Output Voltage: 2. 6 V
• Output Current: 2 A
• Input Voltage: 7 V to 35 V
• Operating Temperature Range: - 40 C to + 105 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: BD9007F-E2TR

●Timing Chart
●External synchronizing function
BD9006F, BD9006HFP, BD9007F, BD9007HFP
© 2009 ROHM Co., Ltd. All rights reserved.
www.rohm.com
(All series)
・Basic Operation
In order to activate the external synchronizing function, connect the frequency setting resistor to the RT pin and then input a
synchronizing signal to the EN/SYNC pin. As the synchronizing signal, input a pulse wave higher than a frequency
determined with the setting resistor (RT).
However, the external sync frequency should be configured at less than double the configured frequency.
(ex.) When the configured frequency is 100kHz, the external sync frequency should be less than 200kHz.
Furthermore, the pulse wave’s LOW voltage should be under 0.8V and the HIGH voltage over 2.6V (when the HIGH voltage
is over 6V the EN/SYNC input current increases [see p.4 Fig.8]), the through rate of stand-up (and stand-down) under
20V/μS.
V
GND
GND
GND
EN
open
/
SW
SYNC
C2
FB
V
IN
V
IN
=13.2V
Internal
slope
REG
15kΩ
47kΩ
R2
R1
220μF
C
IN
330μF
C0
33μH
2μF
C28
L1
(Vo=3.3V, Io=1A, f=300kHz, EN/SYNC=450kHz)
D1
Fig.22 External Sync Sample Circuit
22000pF
30kΩ
C1
R3
9/17
Fig.21
SW
open
C3
BD9006HFP
51kΩ
R
T
Ven/sync=0～5V
f=450kHz
SR=20V/μs
Duty=50%
Technical Note
2009.05 - Rev.A