PRELIMINARY
CM3018
Micropower, 150mA Low Noise CMOS Regulator
with Fast Response
Features
Product Description
•
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 response when enabled
The CM3018 is a very low dropout, low noise regulator
that delivers up to 150mA of load current at a fixed out-
put voltage.
•
•
•
•
•
•
•
•
•
•
•
OUT
Ultra low noise (35µV rms typ.)
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.
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)
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.
•
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
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 OptiGuardTM technology to provide increased reli-
ability at assembly.
•
•
•
•
•
All versions of the CM3018 are now available with
optional lead-free finishing.
Typical Application Circuit
Simplified Electrical Schematic
CM3018
V
V
OUT
IN
EN
V
IN
V
OUT
OUT
EN
+
C
BYP
IN
+
+
C
OUT
BYP
+
VREF
1
µF
-
GND
-
1
µF
C
BYP
10nF
GND
1x
GND
© 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