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MC34700EPR2 Folha de dados(PDF) 3 Page - Freescale Semiconductor, Inc

Nome de Peças MC34700EPR2
Descrição Electrónicos  9 to 18V, Quad Output, Integrated MOSFET Power Supply
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Fabricante Electrônico  FREESCALE [Freescale Semiconductor, Inc]
Página de início  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC34700EPR2 Folha de dados(HTML) 3 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
3
34700
PIN CONNECTIONS
PIN CONNECTIONS
Figure 3. 34700 Pin Connections
Table 1. 34700 Pin Definitions
Pin Number
Pin Name
Pin Function
Formal Name
Definition
1,32
VIN1
Power Input
DC/DC1 Power
Input
Buck regulator #1 power input. VIN1 is connected to the drain of DC/
DC1’s high side MOSFET.
2,3
SW1
Power Output
Switch 1 Output
Buck regulator #1 switching node. SW1 is connected to the source of DC/
DC1’s high side MOSFET.
4
BST1
Input
Bootstrap1
Bootstrap capacitor input for DC/DC1.
5
GND2
Power Ground
Power Ground
Buck regulator #2 power ground. GND2 is connected to the source of DC/
DC2’s low side MOSFET.
6
SW2
Power Output
Switch 2 Output
Buck regulator #2 switching node. SW2 is connected to the source of the
high side MOSFET and the drain of the low side MOSFET.
7
VIN2
Power Input
DC/DC2 Power
Input
Buck regulator #2 power input. VIN2 is connected to the drain of DC/
DC2’s high side MOSFET.
8
BST2
Input
Bootstrap2
Bootstrap capacitor input for DC/DC2.
9
COMP2
Output
DC/DC2
Compensation
Output
Buck regulator #2 compensation output. COMP2 is connected to the error
amplifiers output.
10
FB2
Input
DC/DC2 Feedback
Input
Buck regulator #2’s error amplifier inverting input. Connect the output
voltage feedback resistor divider and compensation network to this pin.
11
EN1
Input
Enable DC/DC1
Enables buck regulator #1. Asserting EN1 turns on DC/DC1.
12
EN2
Input
Enable DC/DC2
Enables buck regulator #2. Asserting EN2 turns on DC/DC2.
13
EN3
Input
Enable DC/DC3
Enables buck regulator #3. Asserting EN3 turns on DC/DC3.
14
EN_LDO
Input
Enable LDO
Enables the LDO. Asserting EN_LDO turns on the LDO.
15
FB3
Input
DC/DC3 Feedback
Input
Buck regulator #3’s error amplifier inverting input. Connect the output
voltage feedback resistor divider and compensation network to this pin.
VIN1
SW1
SW1
BST1
GND2
SW2
VIN2
BST2
BST3
VIN3
SW3
LDO_FB
LDO
LDO_VIN
VIN
GND3
TRANSPARENT
TOP VIEW
1
2
3
4
5
6
7
8
9
10
11 12
13
14 15 16
17
18
27
19
20
21
22
23
24
25
26
28
29
30
31
32
PIN 33


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