PRELIMINARY
CM3015
Micropower, 300mA Low Dropout CMOS Regulator
Features
Product Description
•
The CM3015 is a CMOS linear voltage regulator with
low quiescent current, very low dropout voltage and
better than 1% fixed output voltage accuracy. The
CM3015 ground current is typically 150µA at light loads
and only 165µA at 300mA.
•
•
•
•
•
•
•
•
•
300mA output current capability
•300mA peak in SOT-23 package
•300mA continuous in MSOP package
300mV maximum dropout voltage at full load
Excellent line and load regulation
Stable with any 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
Load regulation of 0.25% is maintained for peak currents up to 300mA. This is useful for supplying in-rush
currents during power-up and transient conditions. The
continuous output current is determined by power dissipation, 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 and the
supply current will drop to near zero.
Applications
•
•
•
•
The CM3015 also features reverse current protection.
This protects the device by blocking the pass transistor’s parasitic diode when the output voltage is forced
higher than the input. The device also incorporates
overload current limiting and high temperature thermal
shutdown protection.
Notebook and palmtop computers
Cell phones and battery powered devices
Consumer and personal electronics
PC Card VCC and VPP regulation and switching
For low noise performance and increased power supply ripple rejection, a bypass capacitor can be connected to the BYP pin. Connecting this capacitor will
not significantly delay the speed of power-up.
CM3015 Regulator Family
PRODUCT
CM3015-00
OUTPUT VOLTAGE*
Adjustable
CM3015-12
1.2V
CM3015-15
1.5V
CM3015-18
1.8V
CM3015-25
2.5V
CM3015-28
2.8V
CM3015-30
3.0V
CM3015-33
3.3V
To reduce board cost and layout size the CM3015 was
designed to be stable with or without any output capacitor. This includes tiny, low ESR ceramic capacitors.
The CM3015 is available in a low profile, 8-lead MSOP
package and 5 and 6-lead SOT23 packages making it
ideal for space critical applications.
* For other output voltages, please consult factory.
Block Diagram
Reverse
Current
Protection
IN
OUT
Current
Limit
VREF
+
BYP
AMP
-
Fast
Power-Up
R1
EN
VSENSE*
Enable
Control
EN
Thermal
Overload
R2
Active
Pulldown
GND
* Adjustable output version only
© 2004 California Micro Devices Corp. All rights reserved.
09/14/04
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1
PRELIMINARY
CM3015
PACKAGE / PINOUT DIAGRAM (Note 1)
TOP VIEW
EN
3
1
GND
2
4
BYP EN
5-PIN SOT23
CM3015-12ST,-15ST,
-18ST,-25ST,-30ST,-33ST
3
TOP VIEW
6
VOUT
5
SENSE
BYP
4
EN
1
VIN
2
VOUT
3
BYP
4
TOP VIEW
8
GND
EN
1
7
6
GND
VIN
2
GND
VOUT
3
5
GND VSENSE
4
8
GND
7
GND
6
GND
5
GND
8-PIN MSOP
CM3015-00MA
8-PIN MSOP
CM3015-12MA,-15MA,
-18MA,-25MA,-30MA,-33MA
6-PIN SOT23
CM3015-00ST
CM30
1500
2
VOUT VIN
CM30
15nn2
GND
5
CC00
1
CCnn2
VIN
TOP VIEW
Notes:
1) These drawings are not to scale.
2) See Ordering Information section for part marking details.
PIN DESCRIPTIONS
SOT23-5
PIN(S)
SOT23-6
PIN(S)
MSOP-8
PIN(S)
NAME
1
1
2
VIN
2
2
5-8
GND
3
3
1
EN
4
4
4
BYP
Reference Bypass Pin. Connect to an external capacitor for noise reduction. A 10nF-100nF size ceramic capacitor is recommended.
−
5
4
VSENSE
This pin sets VOUT with an external divider: VOUT = VSENSE(1+ R1/R2).
R1 is the upper resistor, like the internal divider shown on the block diagram on page 1.
5
6
3
VOUT
DESCRIPTION
VIN is the input power source 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 about 1-10µF will ensure adequate filtering.
The negative reference for all voltages.
Enable input. When this input is taken low (< 0.4V), the regulator is disabled. In this state, the supply current will drop to near zero.
VOUT is the output voltage used to power the load. An output capacitor
may not be required for stability, but its use can improve transient
response, noise performance and power supply ripple rejection for frequencies over ~100kHz (see note 1).
Note 1: Tantalum, electrolytic or low cost ceramic capacitors may be used.
© 2004 California Micro Devices Corp. All rights reserved.
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PRELIMINARY
CM3015
Ordering Information
PART NUMBERING INFORMATION
Pins
Package
Ordering Part Number1
Part Marking
6
SOT23-6
CM3015-00ST
CC00
5
SOT23-5
CM3015-12ST
CC12
5
SOT23-5
CM3015-15ST
CC15
5
SOT23-5
CM3015-18ST
CC18
5
SOT23-5
CM3015-25ST
CC25
5
SOT23-5
CM3015-28ST
CC28
5
SOT23-5
CM3015-30ST
CC30
5
SOT23-5
CM3015-33ST
CC33
8
MSOP-8
CM3015-00MA
CM301500
8
MSOP-8
CM3015-12MA
CM301512
8
MSOP-8
CM3015-15MA
CM301515
8
MSOP-8
CM3015-18MA
CM301518
8
MSOP-8
CM3015-25MA
CM301525
8
MSOP-8
CM3015-28MA
CM301528
8
MSOP-8
CM3015-30MA
CM301530
8
MSOP-8
CM3015-33MA
CM301533
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
RATING
UNITS
+2000
V
[GND - 0.6] to [+6.0]
[GND - 0.6] to [VCC + 0.6]
[GND - 0.6] to [VCC + 0.6]
V
V
V
ESD Protection (HBM)
Pin Voltages
VIN
EN
VOUT
Storage Temperature Range
-40 to +150
°C
0 to +150
°C
Internally Limited
W
Operating Temperature Range, Junction
Power Dissipation (Notes 1,2)
STANDARD OPERATING CONDITIONS
PARAMETER
RATING
UNITS
VIN
2.2 to 6.0
V
Ambient Operating Temperature Range
-40 to +85
°C
Load Current
0 to 300
mA
CEXT (notes 1 and 2)
0 to 50
µF
Note 1: Tantalum, electrolytic or low cost ceramic capacitors may be used.
Note 2: VOUT + 1V < VIN & 2.5V < VIN < 6V, IOUT = 1mA, CIN = 2.2µF, TJ = 25°C, COUT = 2.2µF, VSD = 1.5V, unless specified otherwise. Bold values indicate -40°C < TJ < 125°C
© 2004 California Micro Devices Corp. All rights reserved.
09/14/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
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3
PRELIMINARY
CM3015
Specifications (cont’d)
ELECTRICAL OPERATING CHARACTERISTICS
SYMBOL
(SEE NOTE 1)
CONDITIONS
Regulator Output Voltage
TA = 25°C
0°C<TJ<125°C
-40°C<TJ<125°C
VR LINE
Line Regulation
VOUT + 1V < VIN & 2.5V < VIN < 6V
0.1
0.2
0.4
%/V
VR LOAD
Load Regulation
0mA ≤ IOUT ≤ 150mA; VIN = VOUT + 1V;
Note 2
0.1
0.25
0.50
%
VSENSE
Reference Voltage
TA = 25°C
1.20
RDROP
Dropout Resistance
1mA ≤ ILOAD ≤ 300mA;
VIN = VOUT(nominal) -100mV
0.7
1.0
1.2
Ω
Ground Current
with EN tied to VIN; ILOAD = 1mA
150
200
µA
with EN tied to VIN; ILOAD = 350mA
165
250
µA
0.01
1
µA
VOUT
IGND
MIN
-1
-2
-3
Enable Voltage
Regulator enabled
VDIS
Disable Voltage
Regulator shutdown
IEN
MAX
+1
+2
+3
with EN tied to GND (Disable Mode)
VEN
TYP
UNIT
S
%
%
%
PARAMETER
V
1.5
V
0.40
0.18
Enable Input Current
V
0.01
µA
PSSR
Power Supply Ripple Rejection
f=1kHz
75
dB
ENOISE
Output Noise Voltage
10Hz-100kHz; CBYP = 0.1µF
30
µVrms
VOUT Turn-on Time
CBYP = 0µF
80
µs
CBYP = 0.1µF
100
µs
800
mA
550
mA
Thermal Shutdown Junction
Temperature
165
°C
Thermal Hysteresis
20
°C
tON
ILIM
Overload Current Limit
ISC
Short Circuit Current Limit
TJSD
THYST
VOUT < 0.5V
Note 1: VOUT + 1V < VIN & 2.5V < VIN < 6V, IOUT = 1mA, CIN = 2.2µF, TJ = 25°C, COUT = 2.2µF, VSD = 1.5V, unless specified otherwise. Bold values indicate -40°C < TJ < 125°C
Note 2: Regulation voltages and dropout resistance measured at constant junction temperature using low duty cycle pulse testing.
Note 3: Line regulation is displayed as the average regulation across the full operating range measured in %/V.
THERMAL PERFORMANCE
θJA MINIMUM FOOTPRINT
θJA 1" SQUARE 2OZ. COPPER
SOT23-5 / SOT23-6
220°C/W
170°C/W
MSOP-8 Fused
160°C/W
70°C/W
PACKAGE
© 2004 California Micro Devices Corp. All rights reserved.
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PRELIMINARY
CM3015
Performance Information
Typical DC Characteristics (nominal conditions unless specified otherwise)
Nominal Conditions: CIN = 1µF, COUT = 2.2µF, No CBYP , VIN = 4.0V, Load = 5mA (all plots measured with 3.0V
VOUT)
g
3.00
2.98
OUTPUT VOLTAGE [V]
OUTPUT VOLTAGE [V]
3.10
3.05
3.00
2.95
2.96
2.94
2.92
2.90
2.88
2.90
2.86
0
100
200
300
400
500
3
3.5
CURRENT LOAD [mA]
4.5
5
5.5
6
INPUT VOLTAGE [V]
Figure 4. Line Regulation (ILOAD=300mA)
Figure 1. Load Regulation
0.8
3.04
0.7
3.02
0.6
OUTPUT VOLTAGE [V]
DROPOUT VOLTAGE [V]
4
0.5
0.4
0.3
0.2
0.1
3
2.98
2.96
2.94
2.92
0
0
100
200
300
400
2.9
500
3
3.5
LOAD [mA]
4
4.5
5
5.5
6
INPUT VOLTAGE [V]
Figure 2. Dropout Voltage (VOUT=2.9V)
Figure 5. Line Regulation (ILOAD=5mA)
4.0
4.0
OUTPUT VOLTAGE [V]
OUTPUT VOLTAGE [V]
3.5
3.0
2.0
1.0
0.0
3.0
1mA Load
2.5
2.0
1.5
1.0
0.5
0.0
0 100 200 300 400 500 600 700 800 900
0
LOAD CURRENT [mA]
Figure 3. Foldback Current Limiting
1
2
3
4
INPUT VOLTAGE [V]
5
6
Figure 6. Line Regulation (ILOAD=1mA)
© 2004 California Micro Devices Corp. All rights reserved.
09/14/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
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Tel: 408.263.3214
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5
PRELIMINARY
CM3015
Performance Information (cont’d)
Typical DC Characteristics (cont’d - nominal conditions unless specified otherwise)
Nominal Conditions: CIN = 1µF, COUT = 2.2µF, No CBYP, VIN = 4.0V, Load = 5mA (all plots measured with 3.0V
VOUT)
2500
INPUT SUPPLY CURRENT [nA]
THRESHOLD [mV]
1000
900
800
700
600
500
2
3
4
5
6
SUPPLY VOLTAGE [V]
2000
1500
1000
VOUT = 0V, EN = 0V
500
0
0
7
1
2
3
4
5
INPUT SUPPLY VOLTAGE [V]
6
Figure 10. Input Supply Current vs. Voltage
Figure 7. Enable Voltage Threshold
2500
300
INPUT SUPPLY CURRENT [nA]
QUIESCENT CURRENT [µA]
350
250
200
150
100
50
0
0
1
2
3
4
5
VOUT = 3V, EN = 0V
2000
1500
1000
500
0
0
6
INPUT VOLTAGE (V)
1
2
3
4
5
INPUT SUPPLY VOLTAGE [V]
6
Figure 11. Input Supply Current vs. Voltage
Figure 8. Supply Current vs. Voltage
(EN=VIN, ILOAD = 5mA)
OUTPUT SUPPLY CURRENT [µA]
10000
OUTPUT SUPPLY CURRENT [nA]
2500
2000
1500
1000
VIN = 0V, EN = 0V
500
Clamp to GND
1000
100
VIN = 3V,
EN = 0V
10
1
Protect
0
0
1
2
3
4
5
6
OUTPUT SUPPLY VOLTAGE [V]
0
0
1
2
3
4
5
OUTPUT SUPPLY VOLTAGE [V]
6
Figure 12. Output Supply Current vs. Voltage
Figure 9. Output Supply Current vs. Voltage
© 2004 California Micro Devices Corp. All rights reserved.
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PRELIMINARY
CM3015
Performance Information (cont’d)
Transient Characteristics (nominal conditions unless specified otherwise)
Nominal Conditions: CIN = 1µF, COUT = 2.2µF, No CBYP, VIN = 4.0V, Load = 5mA
(all plots measured with 3.0V VOUT)
Figure 13. 10% to 90% Load Step
(tr=1µs, COUT=10µF)
Figure 16. 3.5V - 4.5V Line Step
(tr=1µs, No COUT)
Figure 14. 10% to 90% Load Step
(tr=1µs, COUT=2.2µF)
Figure 17. 3.5V - 4.5V Line Step
(tr=1µs, No COUT, CBYP=100nF)
Figure 15. 10% to 90% Load Step
(tr=1µs, COUT=1.0µF)
Figure 18. 3.5V - 4.5V Line Step
(tr=1µs, COUT=2.2µF, CBYP=100nF)
© 2004 California Micro Devices Corp. All rights reserved.
09/14/04
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7
PRELIMINARY
CM3015
Performance Information (cont’d)
Transient Characteristics (nominal conditions unless specified otherwise)
Nominal Conditions: CIN = 1µF, COUT = 2.2µF, No CBYP, VIN = 4.0V, Load = 5mA
(all plots measured with 3.0V VOUT)
Figure 19. Enable Response
(No CBYP , No Load)
Figure 22. Power-Up (EN=VIN, ILOAD=5mA,
No COUT, No CBYP)
Figure 20. Enable Response
(CBYP=100nF, No Load)
Figure 23. Power-Up (EN=VIN, ILOAD=5mA,
COUT=2.2µF, CBYP=100nF)
Figure 21. Disable Response
(CBYP=100nF, No Load)
Figure 24. Power-Down (ILOAD=5mA)
© 2004 California Micro Devices Corp. All rights reserved.
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09/14/04
PRELIMINARY
CM3015
Performance Information (cont’d)
Power Supply Ripple Rejection and Noise Characteristics (nominal conditions unless specified otherwise)
Nominal Conditions: CIN = 1µF, VIN = 4.0V, PSRR measured with 50mV peak-to-peak sine wave on VIN.
Power Supply Ripple Rejection
80
80
70
70
60
60
50
50
40
PSRR (dB)
PSRR (dB)
Power Supply Ripple Rejection
100uA Load
5mA Load
100mA Load
300mA Load
30
20
40
30
100uA Load
5mA Load
100mA Load
300mA Load
20
10
10
0
0
10
100
1000
10000
100000
10
100
Frequency (Hz)
1000
10000
100000
Frequency (Hz)
Figure 27. Power Supply Ripple Rejection
(No COUT, CBYP=100nF)
Figure 25. Power Supply Ripple Rejection
(COUT=10µF, CBYP=100nF)
Ouput noise spectral density (100uA Load)
Power Supply Ripple Rejection
80
1.E-06
70
En[µV/rootHz]
PSRR (dB)
60
50
40
100uA Load
5mA Load
100mA Load
300mA Load
30
20
1.E-07
10
COUT = 10µF, CBYP = 100nF
0
10
100
1000
10000
100000
1.E-08
1.E+01
1.E+02
Frequency (Hz)
1.E+03
1.E+04
1.E+05
Frequency [Hz]
Figure 26. Power Supply Ripple Rejection
(COUT=2.2µF, CBYP=100nF)
Figure 28. Output Noise Spectral Density
(ILOAD=100µA, COUT=10µF, CBYP=100nF)
© 2004 California Micro Devices Corp. All rights reserved.
09/14/04
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Tel: 408.263.3214
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9
PRELIMINARY
CM3015
Performance Information (cont’d)
Typical Thermal Characteristics (nominal conditions unless specified otherwise)
Nominal Conditions: CIN = 1µF, COUT = 2.2µF, No CBYP, VIN = 4.0V, Load = 5mA
(all plots measured with 3.0V VOUT)
50
300
GROUND CURRENT [µA]
OUTPUT CHANGE [mV]
40
30
20
10
0
-10
-20
-30
-40
250
200
150
100
50
0
-50
0
25
50
75
100
-40 -20
125
TEMPERATURE [oC]
0
20 40 60 80 100 120 140
TEMPERATURE [oC]
Figure 29. VOUT vs. Temperature
(TA = 0°C to 125°C)
Figure 31. IGND vs. Temperature
(TA = -40°C to 140°C)
50
OUTPUT CHANGE [mV]
40
30
20
10
0
-10
-20
-30
-40
-50
-40 -20
0
20 40 60 80 100 120 140
TEMPERATURE [oC]
Figure 30. VOUT vs. Temperature
(TA = -40°C to 140°C)
© 2004 California Micro Devices Corp. All rights reserved.
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PRELIMINARY
CM3015
Application Information
VIN=VOUT+
RDROP(IOUT)
VOUT=VSENSE (1+R1/R2)
1
VOUT=
4.992V
VOUT 6
VIN
R1
2
GND SENSE 5
1.20V
R2
3
31.6k
10.0k
BYP 4
EN
For the input voltage, Vin minimum will depend on the output current. For
example, if Iout is 100mA, Vin must be at least 4.992V = 1ohm x 100mA =
4.992 + 0.1 = 5.092V.
Figure 32. Adjustable Regulator Application Example
Output Compensation
Low-dropout regulator topologies use a current-carrying transistor ("pass device") that adds additional gain
and phase shift to the design. It is necessary to compensate for these attributes to prevent the design from
becoming unstable. The simplest way to do this is to
add an output RC filter to roll off the gain. Since all regulators use an output capacitor anyway, the only component needed is a suitable resistance. Fortunately, for
the usual range and types of output capacitors, this
resistance can be supplied by the ESR of the caps.
An attribute of the LDO topology is that the pass device
gain generally increases with increasing output current.
This may affect output stability: a design that didn't
need a capacitor now does, or a design that used a
small value now needs a larger one. The CMD advantage is that this component can be selected from any
capacitor family without regard to its ESR. If the circuit
calls for a tiny, low-ESR capacitor, it will work just fine.
For many years, capacitors have been the largest components in regulator circuits, but newer types are
shrinking in size rapidly. Unfortunately, their ESRs
have shrunk as well, taking them out of the range
where they can perform the R function described in
existing LDOs. The CM3015 is a new breed of LDO
regulator that can work with these tiny low-ESR capacitors and thus permit designs that take a minimum of
space.
© 2004 California Micro Devices Corp. All rights reserved.
09/14/04
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Tel: 408.263.3214
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11
PRELIMINARY
CM3015
Mechanical Details
CM3015 devices are available in a 5-lead SOT23
package, a 6-lead SOT23 package and an 8-lead
MSOP package. Dimensions are presented below and
on the following pages.
Mechanical Package Diagrams
TOP VIEW
e1
SOT23-5 Mechanical Specifications
The dimensions for the 3-lead SOT23 package are
presented below.
e
5
4
E1 E
PACKAGE DIMENSIONS
1
Package
SOT23-5
JEDEC No.
MO-178 (Var. AA)
Pins/Leads
5
Dimensions
Millimeters
SIDE VIEW
Inches
Min
Max
Min
Max
--
1.45
--
0.0571
A1
0.00
0.15
0.0000
0.0059
b
0.30
0.50
0.0118
0.0197
c
0.08
0.22
0.0031
0.0087
D
2.75
3.05
0.1083
0.1201
E
2.60
3.00
0.1024
0.1181
E1
1.45
1.75
0.0571
0.0689
e
0.95 BSC
0.0374 BSC
e1
1.90 BSC
0.0748 BSC
L1
# per tape
and reel
0.30
0.60
0.60 REF
3
b
A
L
2
0.0118
D
A
A1
END VIEW
c
0.0236
L1
L
0.0236 REF
3000 pieces
Controlling dimension: millimeters
Package Dimensions for SOT23-5.
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PRELIMINARY
CM3015
Mechanical Details (cont’d)
SOT23-6 Mechanical Specifications
The dimensions for the 6-lead SOT23 package are
presented below.
Mechanical Package Diagrams
TOP VIEW
PACKAGE DIMENSIONS
Package
SOT23-6
JEDEC No.
MO-178 (Var. AB)
Pins/Leads
6
Dimensions
Millimeters
e1
6
Min
Max
Min
Max
--
1.45
--
0.0571
A1
0.00
0.15
0.0000
0.0059
b
0.30
0.50
0.0118
0.0197
c
0.08
0.22
0.0031
0.0087
D
2.75
3.05
0.1083
0.1201
E
2.60
3.00
0.1024
0.1181
E1
1.45
1.75
0.0571
0.0689
e
0.95 BSC
0.0374 BSC
e1
1.90 BSC
0.0748 BSC
L1
# per tape
and reel
0.30
0.60
0.60 REF
0.0118
5
4
E1 E
Pin 1
Marking
Inches
A
L
e
1
2
3
b
SIDE VIEW
D
A
0.0236
A1
0.0236REF
3000 pieces
END VIEW
Controlling dimension: millimeters
c
L1
L
Package Dimensions for SOT23-6.
© 2004 California Micro Devices Corp. All rights reserved.
09/14/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
13
PRELIMINARY
CM3015
Mechanical Details (cont’d)
MSOP-8 Mechanical Specifications:
Mechanical Package Diagrams
The dimensions for the 6-lead SOT23 package are
presented below.
TOP VIEW
D
8
7
6
5
PACKAGE DIMENSIONS
Package
MSOP
Pins
8
Dimensions
Millimeters
Min
Max
Min
Max
A
0.87
1.17
0.034
0.046
A1
0.05
0.25
0.002
0.010
B
0.30 (typ)
0.012 (typ)
C
0.18
0.007
D
2.90
3.10
0.114
0.122
E
2.90
3.10
0.114
0.122
e
0.65 BSC
H
4.78
4.98
0.188
0.196
L
0.52
0.54
0.017
0.025
80 pieces*
# per tape
and reel
4000 pieces
Pin 1
Marking
1
2
3
4
SIDE VIEW
A
0.025 BSC
# per tube
E
H
Inches
A1
SEATING
PLANE
B
e
END VIEW
Controlling dimension: inches
C
* This is an approximate amount which may vary.
L
Package Dimensions for MSOP-8
© 2004 California Micro Devices Corp. All rights reserved.
14 430 N. McCarthy Blvd., Milpitas, CA 95035-5112
●
Tel: 408.263.3214
●
Fax: 408.263.7846
●
www.calmicro.com
09/14/04