CM3016-48
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
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
µ
A at light loads and only 165
µ
A 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.
Applications
•
•
•
Notebook computers
Consumer and personal electronics
Ideal for powering audio codecs
Typical Application Circuit
CM3016-48
IN
EN
C
IN
+
1
µ
F
IN
EN
GND
C
BYP
100
n
F
+
OUT
BYP
C
OUT
+
2.2
µ
F
OUT
Simplified Electrical Schematic
Reverse Current
Protection
IN
Current
Limit
OUT
V
REF
BYP
Fast
Power-Up
+
AMP
-
EN
EN
Enable Control
Thermal Overload
GND
©
2004 California Micro Devices Corp. All rights reserved.
12/22/04
V2.XX
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
1
CM3016-48
PACKAGE / PINOUT DIAGRAM
Top View
IN
GND
EN
1
2
3
4
5
OUT
BYP
5-pin SOT23
Note: This drawing is not to scale.
PIN DESCRIPTIONS
SOT23-5
PIN(S)
1
2
3
4
5
NAME
IN
GND
EN
BYP
OUT
DESCRIPTION
Regulator input. 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 1-10µF will ensure adequate filtering.
Ground is the negative reference for all voltages
Enable input. When this input is taken low (< 0.4V), the regulator is disabled. In this state, the sup-
ply current will drop to near zero.
Reference bypass input. Connect to an external capacitor for noise reduction. A 10nF-100nF
ceramic capacitor is recommended.
Regulator output. No output capacitor is required for stability. Any type of output capacitor can be
added to improve transient response, noise performance and power supply ripple rejection for fre-
quencies over ~100kHz.
Ordering Information
PART NUMBERING INFORMATION
Standard Finish
Pins
5
Package
SOT23
Ordering Part
Number
1
CM3016-48ST
Part Marking
CA48
Lead-free Finish
Ordering Part
Number
1
CM3016-48SO
Part Marking
CR48
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
V2.xx
2
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
12/22/04
CM3016-48
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Pin Voltages
IN
EN
OUT
Storage Temperature Range
Operating Temperature Range
Ambient
Junction
Power Dissipation (Notes 1,2)
RATING
[GND - 0.6] to [+6.0]
[GND - 0.6] to [V
IN
+ 0.6]
[GND - 0.6] to [V
IN
+ 0.6]
-40 to +150
-40 to +85
0 to +150
Internally Limited
UNITS
V
V
V
°C
°C
°C
W
Note 1: The CM3016-48 contains a thermal overload circuit that automatically disables the device thereby preventing excessive
junction temperature. When the SOT23-5 package housing the device is mounted on a typical multi-layer board with moder-
ate heat spreading copper area (2 square inches) will allow up to 0.315W to be safely dissipated. Please consult with factory
for thermal evaluation assistance.
Note 2: Consult CAMD Technical Support for power dissipation information regarding the CM3016-48 packaged in the SOT23 pack-
age.
STANDARD OPERATING CONDITIONS
PARAMETER
V
IN
Ambient Operating Temperature Range
Load Current
C
OUT
RATING
[V
OUT
+ 0.15] to 6.0
-40 to +85
0 to 500
0 -100
UNITS
VDC
°C
mA
µF
V2.XX
12/22/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
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3
CM3016-48
Specifications (continued)
ELECTRICAL OPERATING CHARACTERISTICS
(SEE NOTE1)
SYMBOL
V
OUT
PARAMETER
Output Voltage
CONDITIONS
T
A
= 25°C
0°C < T
J
< 125°C
-40°C < T
J
< 125°C
V
OUT
+1V < V
IN
and 2.5V < V
IN
< 6V
I
OUT
=1mA to 500mA;
V
IN
=V
OUT
+1V; Note 3
I
OUT
=1mA to 500mA;
V
IN
=V
OUT
(nominal)-100mV
with EN tied to V
IN
; I
LOAD
=1mA:
with EN tied to V
IN
; I
LOAD
=150mA:
with EN tied to GND (Disable Mode):
V
EN
V
DIS
I
EN
E
NOISE
t
ON
I
LIM
I
SC
T
JSD
T
HYST
Enable Voltage
Disable Voltage
Enable Input Current
Output Noise Voltage
V
OUT
Turn-on Time
Overload Current Limit
Short Circuit Current Limit
Thermal Shutdown Junction
Temperature
Thermal Hysteresis
V
OUT
< 0.5V
BW=10Hz-100kHz; C
OUT
= 2.2µF;
C
BYP
= 0.1µF
C
BYP
= 0µF; C
OUT
= 2.2µF
C
BYP
= 0.1µF; C
OUT
= 2.2µF
30
80
100
800
550
165
20
Regulator becomes enabled
Regulator enters shutdown
1.5
0.4
0.18
0.01
MIN
4.70
4.66
4.61
TYP
4.75
4.75
4.75
0.1
0.1
0.7
150
165
0.01
MAX
4.80
4.85
4.89
0.2
0.4
0.5
0.8
1
1.2
200
200
1
UNITS
V
V
V
%
%
%
%
Ω
Ω
µA
µA
µA
V
V
V
µA
µVrms
µS
µS
mA
mA
°C
°C
V
R LINE
V
R LOAD
R
DROP
I
GND
Line Regulation (see Note 4)
Load Regulation
Dropout Resistance
Ground Current
Note 1: V
OUT
+1V< V
IN
& 2.5V< V
IN
< 6V, I
OUT
=1mA, C
IN
=2.2uF, T
J
=25°C, unless specified otherwise.
Bold values
indicate -40°C < T
J
< 125°C
Note 2: Tantalum, electrolytic or low ESR ceramic capacitors may be used for C
OUT
.
Note 3: Regulation voltages and dropout resistance is measured at constant junction temperature using low duty
cycle pulse testing.
Note 4: Line regulation is displayed as the average regulation across the full operating range measured in %/V.
THERMAL PERFORMANCE
PACKAGE
SOT23-5
θ
JA
MINIMUM FOOTPRINT
220°C/W
θ
JA
1" SQUARE 2OZ. COPPER
170°C/W
V2.xx
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
12/22/04
CM3016-48
Performance Information
Typical DC Characteristics (nominal conditions unless otherwise specified, CM3016-48ST Only)
C
IN
= 2.2uF, C
OUT
= 2.2uF, No C
BYP
,, V
IN
= 5.75V, Load = 5mA
Load Regulation
4.800
OUTPUT VOLTAGE [V]
Dropout Voltage (Vout=4.7V)
500
OUTPUT VOLTAGE [V]
Foldback Current Limiting
5.0
4.0
3.0
2.0
1.0
0.0
400
DROPOUT [mV]
4.775
300
200
100
0
4.750
4.725
4.700
0
100 200 300 400 500 600 700
LOAD CURRENT [mA]
0
200
400
LOAD [mA]
600
800
0
200
400
600
800
1000 1200
LOAD CURRENT [mA]
Line Regulation
4.76
1mA Load
OUTPUT VOLTAGE [V]
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
1
Line Regulation
1000
900
800
700
600
500
2
3
4
5
6
INPUT VOLTAGE [V]
Enable Voltage Threshold
4.75
4.74
4.73
4.72
4.71
4.70
4.7
5.2
5.7
6.2
INPUT VOLTAGE [V]
OOUTPUT VOLTAGE [V]
1mA Load
200mA Load
THRESHOLD [mV]
4.5
5.0
5.5
SUPPLY VOLTAGE [V]
6.0
Supply Current vs. Voltage (EN = VIN)
180
GROUND CURRENT [uA]
GROUND CURRENT [uA]
Ground Current vs. Output Load
200
Output Supply Current vs. Voltage
2500
OUTPUT SUPPLY CURRENT [nA]
160
140
120
100
80
60
40
20
0
0
En = Vin
175
150
2000
1500
1000
Vin = 0V, EN = 0V
500
0
0
1
2
3
4
5
6
OUTPUT SUPPLY VOLTAGE [V]
1mA Load
125
100
0
100 200 300 400 500 600 700 800
LOAD CURRENT [mA]
1
2
3
4
5
6
INPUT VOLTAGE [V]
Input Supply Current vs. Voltage
2500
INPUT SUPPLY CURRENT [nA]
Input Supply Current vs. Voltage
3000
2500
2000
1500
1000
500
0
0
INPUT SUPPLY VOLTAGE [V]
Output Supply Current vs. Voltage
10000
OUTPUT SUPPLY CURRENT [uA]
INPUT SUPPLY CURRENT [nA]
Vout = 4.75V, EN = 0V
Clamp to GND
1000
100
10
1
Protect
0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
OUTPUT SUPPLY VOLTAGE [V]
2000
1500
1000
Vout = 0V, EN = 0V
500
0
0
1
2
3
4
5
6
INPUT SUPPLY VOLTAGE [V]
Vin = 4.75V,
EN = 0V
1
2
3
4
5
6
V2.XX
12/22/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
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