2004 California Micro Devices Corp. All rights reserved.
07/29/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
1
CM3018
PRELIMINARY
Micropower, 150mA Low Noise CMOS Regulator
with Fast Response
Features
Available with 1.5V, 1.8V, 2.5V, 2.6V, 2.8V, 2.85V,
2.9V, 3.0V, 3.1V or 3.3V outputs
Fast (60
s) V
OUT
response when enabled
Ultra low noise (35
V rms typ.)
Delivers up to 150mA output current
Very low dropout (150mV at 150mA)
Low quiescent operating current (110
A)
Stable with low-ESR ceramic capacitors
"Zero" disable mode current consumption
Thermal overload protection
Foldback overload current protection
-40C to +85C temperature operation
Available in a 5-pin SOT23 and 5-bump Chip Scale
Packages (CSP)
Lead-free versions available
Applications
Wireless handsets, PDAs, MP3 players, digital
cameras
PCs and notebooks
Graphics cards, set-top boxes
Compact Flash memory cards
Battery-powered devices
PC cards
Product Description
The CM3018 is a very low dropout, low noise regulator
that delivers up to 150mA of load current at a fixed out-
put voltage.
A dedicated control input (EN, Active High) provides
power-up sequencing flexibility. When this input is
taken low, the regulator is disabled. In this state, the
supply current will drop to near zero. An internal dis-
charge MOSFET resistance (300
) will force the out-
put to ground whenever the device is disabled.
An optional bypass pin is provided for further improve-
ment of noise performance and to maximize the power
supply ripple rejection.
The CM3018 is fully protected, offering both overload
current limiting and high temperature thermal shut-
down.
The CM3018 is available in a tiny 5 lead SOT-23 pack-
age or a 5-bump CSP and is ideal for space critical
applications. The CSP version of the CM3018 incorpo-
rates OptiGuard
TM
technology to provide increased reli-
ability at assembly.
All versions of the CM3018 are now available with
optional lead-free finishing.
Simplified Electrical Schematic
Typical Application Circuit
V
IN
EN
V
OUT
GND
1
F
1
F
+
-
OUT
+
+
BYP
10nF
C
OUT
C
IN
GND
CM3018
C
BYP
EN
+
V
IN
GND
V
OUT
-
BYP
V
REF
1x
2004 California Micro Devices Corp. All rights reserved.
2
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
07/29/04
CM3018
PRELIMINARY
Pin / Bump Descriptions
Package / Ordering Information
SOT23-5 Package
PIN / BUMP DESCRIPTIONS
SOT23-5
PIN
CSP
BUMP
NAME
DESCRIPTION
1
C3
V
IN
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 1
F will ensure adequate filtering.
2
B2
GND
The negative reference for all voltages.
3
A1
EN
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 (300
) is applied to the output.
4
A3
BYP
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.
5
C1
V
OUT
The regulator voltage output used to power the load. A nominal output capacitor of 1
F
is sufficient to minimize any transient disturbances under normal operating conditions.
Additional output capacitance can be used to further improve transient load response.
PACKAGE / PINOUT DIAGRAM
Note: This drawing is not to scale.
5-pin SOT23
V
IN
GND
EN
1
2
5
3
4
V
OUT
BYP
Top View
ENxx
SOT-23 PART NUMBERING INFORMATION
SOT23-5
PKG.
Pins
Output Voltage
Package
Standard Finish
Lead-free Finish
Ordering Part
Number
1
Part Marking
Ordering Part
Number
1
Part Marking
5
1.5V
SOT23-5
CM3018-15ST
EA15
CM3018-15SO
EG15
5
1.8V
SOT23-5
CM3018-18ST
EA18
CM3018-18SO
EG18
5
2.5V
SOT23-5
CM3018-25ST
EA25
CM3018-25SO
EG25
5
2.8V
SOT23-5
CM3018-28ST
EA28
CM3018-28SO
EG28
5
2.9V
SOT23-5
CM3018-29ST
EA29
CM3018-29SO
EG29
5
3.0V
SOT23-5
CM3018-30ST
EA30
CM3018-30SO
EG30
5
3.1V
SOT23-5
CM3018-31ST
EA31
CM3018-31SO
EG31
5
3.3V
SOT23-5
CM3018-33ST
EA33
CM3018-33SO
EG33
2004 California Micro Devices Corp. All rights reserved.
07/29/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
3
CM3018
PRELIMINARY
Package / Ordering Information (Cont'd)
Chip Scale Package
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Note 2: Lead-free devices are specified by using a "
+
" character for the top side orientation mark.
EN
BYP
VOUT
VIN
A1
A3
C3
C1
GND
B2
Pin "A1"
Marking
A1
nn
2 3
1
C
B
A
Orientation
Marking
(see note 2)
PACKAGE / PINOUT DIAGRAM
Notes:
CM3018
CSP Package
TOP VIEW
BOTTOM VIEW
(Bumps Down View)
(Bumps Up View)
2) Lead-free devices are specified by using a "+" character for the top side orientation mark.
1) These drawings are not to scale.
PART NUMBERING INFORMATION
CSP
BUMPS
Output Voltage
Package
Standard Finish
Lead-free Finish
2
Ordering Part
Number
1
Part Marking
Ordering Part
Number
1
Part Marking
5
1.5V
CSP
CM3018-15CS
MA
CM3018-15CP
MA
5
1.8V
CSP
CM3018-18CS
MB
CM3018-18CP
MB
5
2.5V
CSP
CM3018-25CS
MC
CM3018-25CP
MC
5
2.6V
CSP
CM3018-26CS
MD
CM3018-26CP
MD
5
2.8V
CSP
CM3018-28CS
ME
CM3018-28CP
ME
5
2.85V
CSP
CM3018-2JCS
MF
CM3018-2JCP
MF
5
2.9V
CSP
CM3018-29CS
MG
CM3018-29CP
MG
5
3.0V
CSP
CM3018-30CS
MH
CM3018-30CP
MH
5
3.1V
CSP
CM3018-31CS
MJ
CM3018-31CP
MJ
5
3.3V
CSP
CM3018-33CS
MK
CM3018-33CP
MK
2004 California Micro Devices Corp. All rights reserved.
4
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
07/29/04
CM3018
PRELIMINARY
Specifications
Note 1: The CM3018 contains a thermal overload circuit that automatically disables the device thereby preventing excessive junc-
tion temperature. For example, a SOT23-5 packaged device mounted on a typical multi-layer board with a moderate heat
spreading copper area (2 square inches) will allow up to 0.315W to be safely dissipated, maintaining a safe operating tem-
perature. Please consult with factory for thermal evaluation assistance.
Note 2: Consult CAMD Technical Support to obtain detailed power dissipation information for the CM3018 packaged in the SOT23
and CSP packages.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
RATING
UNITS
ESD Protection (HBM)
+2000
V
Pin Voltages
V
IN
(pin 1)
EN (pin 3)
V
OUT
(pin 5)
[GND - 0.6] to [+6.0]
[GND - 0.6] to [V
IN
+ 0.6]
[GND - 0.6] to [V
IN
+ 0.6]
V
V
V
Storage Temperature Range
-65 to +150
C
Operating Temperature Range
Ambient
Junction
-40 to +85
0 to +130
C
C
Power Dissipation (Notes 1,2)
Internally Limited
W
STANDARD OPERATING CONDITIONS
PARAMETER
RATING
UNITS
V
IN
2.7 to 5.5
V
Ambient Operating Temperature Range
-40 to +85
C
Load Current
0 to +150
mA
C
OUT
1
20%
F
2004 California Micro Devices Corp. All rights reserved.
07/29/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
5
CM3018
PRELIMINARY
Specifications (continued)
Note 1: Electrical operating characteristics are guaranteed over standard operating conditions unless otherwise noted.
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE 1)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
OUT
Regulator Output Voltage
T
A
= 25C;
0mA < I
LOAD
< 150mA; V
IN
-V
OUT
= 1V
-1%
+1%
V
0C < T
A
< 125C;
0mA < I
LOAD
< 150mA; V
IN
-V
OUT
= 1V
-2%
+2%
V
-40C < T
A
< 125C;
0mA < I
LOAD
< 150mA; V
IN
-V
OUT
= 1V
-3%
+3%
V
V
OUTRT
Regulator Response Time
No Load; C
OUT
= 1
f Ceramic Cap
60
s
R
DROPOUT
Dropout Resistance
0mA < I
LOAD
< 150mA
1
1.3
V
R LOAD
Load Regulation
V
IN
-V
OUT
= 1V; 10mA < I
LOAD
< 150mA
.25
%
V
R LINE
Line Regulation
3.3V < V
IN
< 4.3V; I
LOAD
= 5mA
0.15
%/V
I
LIM
Overload Current Limit
400
mA
I
SC
Short Circuit Current Limit
V
OUT
< 1V
200
mA
R
DISCH
Discharge Resistance
EN tied to ground; V
IN
= 3.0V
300
I
GND
Ground Current
with EN tied to V
IN
; I
LOAD
= 0mA:
100
200
A
with EN tied to V
IN
; I
LOAD
= 150mA:
110
250
A
with EN tied to GND (Disable Mode):
0.1
10
A
V
IH
Enable High Threshold
Regulator enabled
0.8
1.2
V
V
IL
Enable Low Threshold
Regulator shutdown
0.4
0.7
V
I
EN
Enable Input Current
V
EN
> 0.8V
.01
A
T
DISABLE
Shutdown Temperature
150
C
T
HYST
Thermal Hysteresis
15
C
PSRR
Ripple Rejection
= 120Hz; V
IN
-
V
OUT
= 1V;
I
LOAD
= 100
A; C
OUT
= 1
F Ceramic;
C
BYP
= 10nF
60
dB
e
N
Output Noise
300Hz-100kHz; C
OUT
= 10
F Ceramic;
C
BYP
= 10nF
35
Vrms
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