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AP3211 датащи(PDF) 2 Page - BCD Semiconductor Manufacturing Limited

номер детали AP3211
подробное описание детали  1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER
PDF  12 Pages
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производитель  BCDSEMI [BCD Semiconductor Manufacturing Limited]
домашняя страница  http://www.bcdsemi.com
Logo BCDSEMI - BCD Semiconductor Manufacturing Limited

AP3211 датащи(HTML) 2 Page - BCD Semiconductor Manufacturing Limited

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Data Sheet
1.4MHz, 1.5A ASYNCHRONOUS DC-DC BUCK CONVERTER
AP3211
Jul. 2011
Rev. 1.3
BCD Semiconductor Manufacturing Limited
2
BS
1
2
34
5
Pin
1 Dot by Marking
6
GND
FB
SW
IN
EN
Pin Configuration
K Package
(SOT-23-6)
Figure 2. Pin Configuration of AP3211 (Top View)
Pin Description
Pin Number
Pin Name
Function
1
BS
Bootstrap pin. A bootstrap capacitor is connected between the
BS pin and SW pin. The voltage across the bootstrap capacitor
drives the internal high-side NMOS switch
2
GND
Ground pin
3
FB
Feedback pin. This pin is connected to an external resistor
divider to program the system output voltage. When VFB exceeds
20% of the nominal regulation value of 0.81V, the OVP is
triggered. When VFB＜0.25V, the oscillator frequency is lowered
to realize short circuit protection
4
EN
Control input pin. Forcing this pin above 1.5V enables the IC.
Forcing this pin below 0.4V shuts down the IC. When the IC is
in shutdown mode, all functions are disabled to decrease the
supply current below 1
μA
5
IN
Supply input pin. A capacitor should be connected between the
IN pin and GND to keep the DC input voltage constant
6
SW
Power switch output pin. This pin is connected to the inductor
and bootstrap capacitor



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