PRELIMINARY
CM3018
Pin / Bump Descriptions
PIN / BUMP DESCRIPTIONS
SOT23-5
PIN
CSP
BUMP
NAME
DESCRIPTION
1
C3
VIN
The input power supply for the regulator. If this input is within a few inches of the main
supply filter, a capacitor may not be necessary. Otherwise an input filter capacitor of
approximately 1µF will ensure adequate filtering.
2
3
B2
A1
GND
EN
The negative reference for all voltages.
A logic input control to enable the regulator output. When EN is asserted (logic high), it
allows output regulation to commence. When EN is deasserted (logic low), the regula-
tor pass transistor is forced into a high impedance mode, and an internal discharge
resistance (300Ω) is applied to the output.
4
5
A3
C1
BYP
This pin is connected to the internal voltage reference of the regulator. An external
bypass capacitor CBYP of 10nF is recommended to improve the noise performance
and to maximize the power supply ripple rejection.
VOUT
The regulator voltage output used to power the load. A nominal output capacitor of 1µF
is sufficient to minimize any transient disturbances under normal operating conditions.
Additional output capacitance can be used to further improve transient load response.
Package / Ordering Information
SOT23-5 Package
PACKAGE / PINOUT DIAGRAM
Top View
1
2
3
5
VIN
GND
EN
VOUT
4
BYP
5-pin SOT23
Note: This drawing is not to scale.
SOT-23 PART NUMBERING INFORMATION
Standard Finish
Lead-free Finish
Ordering Part
Number1
SOT23-5
PKG.
Pins
Ordering Part
Number1
Output Voltage
1.5V
Package
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
Part Marking
EA15
Part Marking
EG15
5
5
5
5
5
5
5
5
CM3018-15ST
CM3018-18ST
CM3018-25ST
CM3018-28ST
CM3018-29ST
CM3018-30ST
CM3018-31ST
CM3018-33ST
CM3018-15SO
CM3018-18SO
CM3018-25SO
CM3018-28SO
CM3018-29SO
CM3018-30SO
CM3018-31SO
CM3018-33SO
1.8V
EA18
EG18
2.5V
EA25
EG25
2.8V
EA28
EG28
2.9V
EA29
EG29
3.0V
EA30
EG30
3.1V
EA31
EG31
3.3V
EA33
EG33
© 2004 California Micro Devices Corp. All rights reserved.
2
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
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Fax: 408.263.7846
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www.calmicro.com
07/29/04
CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
