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L6911E Folha de dados(PDF) 5 Page - STMicroelectronics

Nome de Peças L6911E
Descrição Electrónicos  5-Bit programmable step down controller with synchronous rectification
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6911E Folha de dados(HTML) 5 Page - STMicroelectronics

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L6911E
Pin settings
5/34
2
Pin settings
2.1
Pin connection
Figure 2.
Pin connection (top view)
2.2
Pin description
VSEN
OCSET
SS/INH
VID0
VID1
VID3
VID2
VID4
COMP
PGOOD
PHASE
UGATE
PGND
BOOT
LGATE
VCC
OVP
RT
1
3
2
4
5
6
7
8
9
18
17
16
15
14
12
13
11
19
10
20
FB
GND
D98IN958
Table 2. Pin description
N°
Name
Description
1
VSEN
Connected to the output voltage is able to manage over-voltage conditions and
the PGOOD signal.
2OCSET
A resistor connected from this pin and the upper Mos Drain sets the current
limit protection.
The internal 200
µA current generator sinks a current from the
drain through the external resistor. The Over-Current threshold is due to the
following equation:
3
SS/INH
The soft start time is programmed connecting an external capacitor from this
pin and GND. The internal current generator forces through the capacitor
10
µA.
This pin can be used to disable the device forcing a voltage lower than 0.4V
4 - 8
VID0 - 4
Voltage Identification Code pins. These input are internally pulled-up and TTL
compatible. They are used to program the output voltage as specified in
Table 6 on page 9 and to set the overvoltage and power good thresholds.
Connect to GND to program a ‘0’ while leave floating to program a ‘1’.
9COMP
This pin is connected to the error amplifier output and is used to compensate
the voltage control feedback loop.
10
FB
This pin is connected to the error amplifier inverting input and is used to
compensate the voltage control feedback loop.
I
P
I
OCSET
R
OCSET
Þ
R
DSon
------------------------------------------------
=


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