PRELIMINARY
CM3202
Pin Description
Pin Descriptions
PIN DESCRIPTIONS
PIN(S)
TDFN 8
PIN(S)
SOIC 8
NAME
DESCRIPTION
1
2, 4
3
5, 6
1, 2
3
4, 5
V
IN
NC
V
TT
GND
Input voltage pin, typically 3.3V from the silver box.
V
TT
regulator output voltage pin, which is preset to 50% of V
DDQ
.
Ground pin. The back tab is also ground and serves as the package
heatsink. It should be soldered to the circuit board copper to remove
excess heat from the IC.
This pin is for V
DDQ
output voltage Adjustment. The V
DDQ
output voltage is
set using an external resistor divider connected to ADJSD. The output
voltage is determined by the following formula
R1 + R2
-
V
DDQ
= 1.25V
×
--------------------
R1
7
6
ADJSD
where R1 is the ground-side resistor and R2 is the upper resistor of the
divider. Connect these resistors to the V
DDQ
output at the point of
regulation.
In addition, functions as a Shutdown pin. Apply a voltage higher than V
IN
-
0.6V to this pin to simultaneously shutdown both V
DDQ
and V
TT
outputs.
The outputs are restored when the voltage is lowered below V
IN
-0.6V. A
low-leakage diode in series with the Shutdown signal is recommended to
avoid interference with the voltage adjustment setting.
8
7, 8
V
DDQ
V
DDQ
regulator output voltage pin.
©
2006 California Micro Devices Corp. All rights reserved.
6
490 N. McCarthy Blvd., Milpitas, CA 95035-5112
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Tel: 408.263.3214
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Fax: 408.263.7846
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www.cmd.com
05/08/06
CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
