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BD9P105MUF-CE2 Folha de dados(PDF) 21 Page - Rohm

Nome de Peças BD9P105MUF-CE2
Descrição Electrónicos  3.5 V to 40 V Input, 1 A Single 2.2 MHz Buck DC/DC Converter For Automotive
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Fabricante Electrônico  ROHM [Rohm]
Página de início  http://www.rohm.com
Logo ROHM - Rohm

BD9P105MUF-CE2 Folha de dados(HTML) 21 Page - Rohm

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© 2019 ROHM Co., Ltd. All rights reserved.
28.Apr.2020 Rev.001
www.rohm.com
TSZ22111 • 15 • 001
BD9P1x5MUF-C Series
TSZ02201-0J1J0AL01500-1-2
Function Explanation – continued
5.
External Synchronization Function
By applying clock signal to the MODE pin, the switching frequency can be synchronized to the external clock signal.
When clock signal is applied with the synchronization frequency range between 1.8 MHz and 2.4 MHz and the duty
range between 25 % and 75 %, the Synchronous mode is started after 4 rising edges of the clock signal. In addition, this
function is enabled after VRESET becomes high. If the duration between each rising edge exceeds 0.9 µs (Typ) or more,
the Synchronous mode is deactivated and switching operation by internal clock is activated (the Non-Synchronous
mode). The Spread Spectrum function cannot be activated during the Synchronous mode.
VIN
VEN
VOUT
VSW
VRESET
VMODE
Non-Synchronous
tDLY
tRSTNACT
Synchronous
0.9
μs (Typ)
VRTH
3.6 ms
(Typ)
400 µs
(Typ)
Non-Synchronous
Synchronous
Figure 35. External Synchronization Function


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