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MC34704 Datenblatt(PDF) 7 Page - Freescale Semiconductor, Inc

Teilenummer MC34704
Bauteilbeschribung  Multiple Channel DC-DC Power Management IC
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Hersteller  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC34704 Datenblatt(HTML) 7 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
7
34704
PIN CONNECTIONS
46
A/B
PVIN2
Power
REG2 power supply input
voltage
This is the connection to the drain of the high side switch FET.
Input decoupling /filtering is required for proper REG2 operation.
47
A/B
SW2D
Input/Output
REG2 Buck Stage
switching node
The inductor is connected between this pin and the SW2U pin.
48
A/B
VOUT2
Output
REG2 regulated output
voltage pin
Connect this pin to the load and to the output filter as close to
the pin as possible.
49
A/B
SW2U
Input/Output
REG2 Boost Stage
switching node
The inductor is connected between this pin and the SW2D pin.
50
A/B
SW5U
Input/Output
REG5 Boost Stage
switching node
The inductor is connected between this pin and the SW5D pin.
51
A/B
VOUT5
Output
REG5 regulated output
voltage pin
Connect this pin to the load and to the output filter as close to
the pin as possible.
52
A/B
SW5D
Input/Output
REG5 Buck Stage
switching node
The inductor is connected between this pin and the SW5U pin.
53
A/B
PVIN5
Power
REG5 power supply input
voltage
This is the connection to the drain of the high side switch FET.
Input decoupling /filtering is required for proper REG5 operation.
54
A/B
BT5D
Passive
REG5 Buck Stage
bootstrap capacitor input
pin
Connect a 1
μF capacitor between this pin and SW5D pin to
enhance the gate of the Switch Power MOSFET.
55
A/B
FB5
Input
REG5 voltage feedback
input for voltage
regulation/programming
Connect the feedback resistor divider to this pin.
56
A/B
COMP5
Passive
REG5 compensation
network connection
REG5 compensation network connection.
Exposed
Pad
A/B
PGND
Ground
Power Ground
Connection for all of the
regulators except REG7
Power Ground Connection for all of the regulators except
REG7. This pad is provided to enhance thermal performance.
Table 2. 34704 Pin Definitions (continued)
A functional description of each pin can be found in the Functional Pin Description section beginning on page 17.
Pin Number Device Pin Name Pin Function
Formal Name
Definition


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