PRELIMINARY
CM3018
Pin / Bump Descriptions
PIN / BUMP DESCRIPTIONS
SOT23-5
PIN
1
CSP
BUMP
C3
NAME
V
IN
DESCRIPTION
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.
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.
This pin is connected to the internal voltage reference of the regulator. An external
bypass capacitor C
BYP
of 10nF is recommended to improve the noise performance
and to maximize the power supply ripple rejection.
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.
2
3
B2
A1
GND
EN
4
A3
BYP
5
C1
V
OUT
Package / Ordering Information
SOT23-5 Package
PACKAGE / PINOUT DIAGRAM
Top View
V
IN
GND
EN
1
5
V
OUT
ENxx
4
BYP
2
3
Note: This drawing is not to scale.
5-pin SOT23
SOT-23 PART NUMBERING INFORMATION
SOT23-5
PKG.
Pins
5
5
5
5
5
5
5
5
2
Standard Finish
Ordering Part
Part Marking
Number
1
CM3018-15ST
EA15
CM3018-18ST
EA18
CM3018-25ST
EA25
CM3018-28ST
EA28
CM3018-29ST
EA29
CM3018-30ST
EA30
CM3018-31ST
EA31
CM3018-33ST
EA33
Lead-free Finish
Ordering Part
Part Marking
Number
1
CM3018-15SO
EG15
CM3018-18SO
EG18
CM3018-25SO
EG25
CM3018-28SO
EG28
CM3018-29SO
EG29
CM3018-30SO
EG30
CM3018-31SO
EG31
CM3018-33SO
EG33
▲
www.calmicro.com
07/29/04
Output Voltage
1.5V
1.8V
2.5V
2.8V
2.9V
3.0V
3.1V
3.3V
Package
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
SOT23-5
©
2004 California Micro Devices Corp. All rights reserved.
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
