CM3018 Datasheet, PDF (1/11 Pages) California Micro Devices Corp – Micropower, 150mA Low Noise CMOS Regulator with Fast Response

PRELIMINARY
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
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 (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.
Typical Application Circuit
Simplified Electrical Schematic
CM3018
+ ^CIN +
-
1µF
GND
V_IN
V_OUT
EN
BYP
GND
C_BYP
10nF
C_{OUT +}
1µF
V_IN
EN
OUT
BYP
GND
+
V_REF
-
1x
V_OUT
© 2004 California Micro Devices Corp. All rights reserved.
07/29/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: [phone] ▲ Fax: [phone] ▲ www.calmicro.com
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