CM3018
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 (60µs) V
OUT
response when enabled
Ultra low noise (35µV rms typ.)
Delivers up to 150mA output current
Very low dropout (150mV at 150mA)
Low quiescent operating current (110µA)
Stable with low-ESR ceramic capacitors
“Zero” disable mode current consumption
Thermal overload protection
Foldback overload current protection
-40°C to +85°C temperature operation
Available in a 5-pin SOT23 and 5-bump Chip Scale
Packages (CSP)
Lead-free versions available
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 (300Ω) 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.
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
Typical Application Circuit
CM3018
V
IN
V
OUT
+
-
GND
C
IN
EN
+
1
µ
F
BYP
GND
C
BYP
10nF
Simplified Electrical Schematic
V
IN
EN
V
OUT
OUT
BYP
+
V
REF
C
OUT
+
1
µ
F
-
1x
GND
© 2004 California Micro Devices Corp. All rights reserved.
03/19/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
▲
www.calmicro.com
1
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
2
3
4
BYP
5
V
OUT
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
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
Number
1
CM3018-15ST
CM3018-18ST
CM3018-25ST
CM3018-28ST
CM3018-29ST
CM3018-30ST
CM3018-31ST
CM3018-33ST
Part Marking
EA15
EA18
EA25
EA28
EA29
EA30
EA31
EA33
Lead-free Finish
Ordering Part
Number
1
CM3018-15SO
CM3018-18SO
CM3018-25SO
CM3018-28SO
CM3018-29SO
CM3018-30SO
CM3018-31SO
CM3018-33SO
▲
Part Marking
EG15
EG18
EG25
EG28
EG29
EG30
EG31
EG33
03/19/04
© 2004 California Micro Devices Corp. All rights reserved.
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
www.calmicro.com
CM3018
Package / Ordering Information (Cont’d)
Chip Scale Package
PACKAGE / PINOUT DIAGRAM
TOP VIEW
(Bumps Down View)
Orientation
Marking
(see note 2)
BOTTOM VIEW
(Bumps Up View)
1 2 3
VOUT
VIN
A
B
C
C1
GND
C3
B2
nn
Pin "A1"
Marking
EN
BYP
A1
A3
A1
Notes:
1) These drawings are not to scale.
2) Lead-free devices are specified by using a "+" character for the top side orientation mark.
CM3018
CSP Package
PART NUMBERING INFORMATION
Standard Finish
CSP
BUMPS
5
5
5
5
5
5
5
5
5
5
Ordering Part
Output Voltage
1.5V
1.8V
2.5V
2.6V
2.8V
2.85V
2.9V
3.0V
3.1V
3.3V
Package
CSP
CSP
CSP
CSP
CSP
CSP
CSP
CSP
CSP
CSP
Number
1
CM3018-15CS
CM3018-18CS
CM3018-25CS
CM3018-26CS
CM3018-28CS
CM3018-2JCS
CM3018-29CS
CM3018-30CS
CM3018-31CS
CM3018-33CS
Part Marking
MA
MB
MC
MD
ME
MF
MG
MH
MJ
MK
Lead-free Finish
2
Ordering Part
Number
1
CM3018-15CP
CM3018-18CP
CM3018-25CP
CM3018-26CP
CM3018-28CP
CM3018-2JCP
CM3018-29CP
CM3018-30CP
CM3018-31CP
CM3018-33CP
Part Marking
MA
MB
MC
MD
ME
MF
MG
MH
MJ
MK
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.
© 2004 California Micro Devices Corp. All rights reserved.
03/19/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
▲
www.calmicro.com
3
CM3018
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
ESD Protection (HBM)
Pin Voltages
V
IN
(pin 1)
EN (pin 3)
V
OUT
(pin 5)
Storage Temperature Range
Operating Temperature Range
Ambient
Junction
Power Dissipation (Notes 1,2)
RATING
+2000
[GND - 0.6] to [+6.0]
[GND - 0.6] to [V
IN
+ 0.6]
[GND - 0.6] to [V
IN
+ 0.6]
-65 to +150
-40 to +85
0 to +130
Internally Limited
UNITS
V
V
V
V
°C
°C
°C
W
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.
STANDARD OPERATING CONDITIONS
PARAMETER
V
IN
Ambient Operating Temperature Range
Load Current
C
OUT
RATING
2.7 to 5.5
-40 to +85
0 to +150
1
±20%
UNITS
V
°C
mA
µF
© 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
03/19/04
CM3018
Specifications (continued)
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE 1)
SYMBOL
V
OUT
PARAMETER
Regulator Output Voltage
CONDITIONS
T
A
= 25°C;
0mA < I
LOAD
< 150mA; V
IN
-V
OUT
= 1V
0°C < T
A
< 125°C;
0mA < I
LOAD
< 150mA; V
IN
-V
OUT
= 1V
-40°C < T
A
< 125°C;
0mA < I
LOAD
< 150mA; V
IN
-V
OUT
= 1V
V
OUTRT
Regulator Response Time
No Load; C
OUT
= 1µf Ceramic Cap
0mA < I
LOAD
< 150mA
V
IN
-V
OUT
= 1V; 10mA < I
LOAD
< 150mA
3.3V < V
IN
< 4.3V; I
LOAD
= 5mA
MIN
-1%
-2%
-3%
60
1
.25
1
400
V
OUT
< 1V
EN tied to ground; V
IN
= 3.0V
with EN tied to V
IN
; I
LOAD
= 0mA:
with EN tied to V
IN
; I
LOAD
= 150mA:
with EN tied to GND (Disable Mode):
V
IH
V
IL
I
EN
T
DISABLE
T
HYST
PSRR
Enable High Threshold
Enable Low Threshold
Enable Input Current
Shutdown Temperature
Thermal Hysteresis
Ripple Rejection
ƒ
= 120Hz; V
IN
−
V
OUT
= 1V;
I
LOAD
= 100µA; C
OUT
= 1µF Ceramic;
C
BYP
= 10nF
300Hz-100kHz; C
OUT
= 10µF Ceramic;
C
BYP
= 10nF
Regulator enabled
Regulator shutdown
V
EN
> 0.8V
0.4
200
300
100
110
0.1
0.8
0.7
.01
150
15
60
200
250
10
1.2
1.3
TYP
MAX
+1%
+2%
+3%
UNITS
V
V
V
µs
Ω
%
%/V
mA
mA
Ω
µA
µA
µA
V
V
µA
°C
°C
dB
R
DROPOUT
Dropout Resistance
V
R LOAD
V
R LINE
I
LIM
I
SC
R
DISCH
I
GND
Load Regulation
Line Regulation
Overload Current Limit
Short Circuit Current Limit
Discharge Resistance
Ground Current
e
N
Output Noise
35
µVrms
Note 1: Electrical operating characteristics are guaranteed over standard operating conditions unless otherwise noted.
© 2004 California Micro Devices Corp. All rights reserved.
03/19/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲
Tel: 408.263.3214
▲
Fax: 408.263.7846
▲
www.calmicro.com
5
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