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CM3016-48ST Datasheet(PDF) 1 Page - California Micro Devices Corp

Part # CM3016-48ST
Description  Micropower, 4.75V/500mA Low Noise CMOS LDO Regulator
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Manufacturer  CALMIRCO [California Micro Devices Corp]
Direct Link  http://www.calmicro.com
Logo CALMIRCO - California Micro Devices Corp

CM3016-48ST Datasheet(HTML) 1 Page - California Micro Devices Corp

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© 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
CM3016-48
V2.XX
12/22/04
1
Micropower, 4.75V/500mA Low Noise CMOS LDO Regulator
Features
Linear LDO regulator with 4.75V output
500mA output current capability
- 500mA peak in SOT-23 package
500mV maximum dropout voltage at full load
150mV maximum dropout at 150mA load
Excellent line and load regulation
Stable with low ESR output capacitor
Ultra low noise with optional bypass capacitor
Fast power-up with bypass capacitor
"Zero" current in Shutdown mode
Thermal Overload Protection
Foldback Current Limiting Protection
Reverse current protection
Lead-free version available
Applications
Notebook computers
Consumer and personal electronics
Ideal for powering audio codecs
Product Description
The CM3016-48 is a CMOS linear voltage regulator with
low quiescent current, very low drop out voltage and better
than 1% initial output voltage accuracy. The quiescent cur-
rent is typically 150
µA at light loads and only 165µA at
500mA. This is 5% more efficient than equivalent Bi-CMOS
devices that can waste up to 25mA at 500mA load. The
CM3016-48 can maintain load regulation for peak currents
up to 500mA, which is useful for supplying inrush currents
during power-up and transient conditions. Continuous out-
put current is limited by package type and board layout.
A dedicated control input (EN, Active High) has been
included for power-up sequencing flexibility. When this input
is taken low, the regulator is disabled. In this state, the sup-
ply current will drop to near zero. The device also features
reverse current protection. This protects the device by
blocking the pass transistors parasitic diode when the out-
put voltage is forced higher than the input.
For low noise performance and increased power supply rip-
ple rejection a noise bypass capacitor can be connected to
the BYP pin. Connecting this capacitor will not significantly
delay the speed of power-up.
The CM3016-48 is fully protected, offering both overload
current limiting and high temperature thermal shutdown. To
reduce board cost and layout size, the CM3016 was
designed to be stable with or without an output capacitor.
This includes tiny, low ESR ceramic capacitors.
The CM3016-48 is housed in a 5-pin SOT23 package and
is ideal for space critical applications. It is available with
optional lead-free finishing.
Simplified Electrical Schematic
Typical Application Circuit
EN
+
IN
GND
OUT
-
BYP
VREF
Enable Control
Thermal Overload
Fast
Power-Up
Current
Limit
EN
AMP
Reverse Current
Protection
IN
EN
OUT
GND
1µF
2.2µF
OUT
+
+
COUT
CIN
CM3016-48
100nF
+
CBYP
BYP
IN
EN


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