SMM665B
Preliminary Information
PIN DESCRIPTIONS (Cont.)
Pin
Number
14
15
41,36,
31,26,
21,16
42,37,
32,27,
22,17
43,38,
33,28,
23,18
44,39,
34,29,
24,19
45,40,
35,30,
25,20
46
47
48
Pin
Type
I/O
CAP
IN
CAP
OUT
OUT
CAP
PWR
PWR
CAP
Pin Name
VREF_CNTL
FILT_CAP
VM
X
CAP
X
PUP
X
TRIM
X
TRIM_CAP
X
VDD
12VIN
VDD_CAP
Pin Description
Voltage reference input used for DC output control and margining.
VREF_CNTL can be programmed to output the internal 1.25V reference.
External capacitor input used to filter VM
X
inputs
Positive converter sense line, VM
A
through VM
F
External capacitor input used to filter the VM
X
inputs to the 10-bit ADC, CAP
A
through CAP
F
. This provides an RC filter where R = 25kΩ.
Programmable active high/low open drain converter enable output, PUP
A
through PUP
F
Output voltage used to control the output of DC/DC converters, TRIM
A
through TRIM
F
External sample and hold capacitor input used to set the voltage on the
TRIM pins, TRIM_CAP
A
through TRIM_CAP
F
Power supply of the part
12V power supply input internally regulated to either 3.6V or 5.5V
External capacitor input used to filter the internal supply
Summit Microelectronics, Inc
2089 1.1 10/20/04
5
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
