PIN CONNECTIONS
Table 1. 34717 Pin Definitions (continued)
A functional description of each pin can be found in the Functional Pin Description section beginning on page 12 .
Pin Number
14
15
16
17
18
19
20
21
22,23
24
25
27
Pin Name
VOUT2
PGND2
SW2
PVIN2
BOOT2
ILIM1
ILIM2
FREQ
VIN
GND
VDDI
GND
Pin Function
Output
Ground
Output
Power
Input
Input
Input
Input
Power
Ground
Output
Ground
Formal Name
Output Voltage
Discharge Path
Power Ground
Switching Node
Power Input Voltage
Bootstrap Input
Soft Start Adjustment
Input CH 1
Soft Start Adjustment
Input CH 2
Frequency Adjustment
Input
Input Supply Voltage
Signal Ground
Internal Supply
Voltage
Thermal Pad
Definition
Channel 2 Buck converter output voltage discharge pin
Channel 2 Buck converter and discharge MOSFETs power ground
Channel 2 Buck converter switching node
Channel 2 Buck converter power input
Channel 2 Bootstrap capacitor input pin
Channel 1 soft start adjustment
Channel 2 soft start adjustment
The buck converters switching frequency adjustment input
Power supply voltage of the IC
Analog ground of the IC
Internal Supply Voltage Output
Thermal pad for heat transfer. Connect the thermal pad to the analog
ground and the ground plane for heat sinking.
34717
Analog Integrated Circuit Device Data
4
Freescale Semiconductor
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