34704_09 Datasheet, PDF (7/49 Pages) Freescale Semiconductor, Inc – Multiple Channel DC-DC Power Management IC

PIN CONNECTIONS
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
46
A/B PVIN2
Power
REG2 power supply input This is the connection to the drain of the high side switch FET.
voltage
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 Connect this pin to the load and to the output filter as close to
voltage pin
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 Connect this pin to the load and to the output filter as close to
voltage pin
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 This is the connection to the drain of the high side switch FET.
voltage
Input decoupling /filtering is required for proper REG5 operation.
54
A/B BT5D
Passive ^{REG5 Buck Stage}
Connect a 1μF capacitor between this pin and SW5D pin to
bootstrap capacitor input enhance the gate of the Switch Power MOSFET.
pin
55
A/B
FB5
Input
REG5 voltage feedback Connect the feedback resistor divider to this pin.
input for voltage
regulation/programming
56
A/B COMP5 Passive ^{REG5 compensation}
REG5 compensation network connection.
network connection
Exposed A/B PGND
Pad
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.
Analog Integrated Circuit Device Data
Freescale Semiconductor
34704
7