CALMIRCO CM3003-18

CM3003
1.5 Amp Dual Mode Low Dropout CMOS Regulator
Features
Product Description
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The CM3003 is a family of very low dropout regulators
that offers dual mode operation. When the Adjust control pin (ADJ) is grounded, these devices automatically
enter a fixed voltage mode and deliver either a 1.8V or
2.5V output capable of supplying 1.5A, depending on
the device utilized. When the Adjust pin is connected to
an external resistor network the device automatically
operates as an adjustable regulator. The Adjust pin can
also be tied directly to the OUT pin which configures
the CM3003 as a 1.2V regulator.
Adjustable Output or Internally Fixed
375mV dropout at 1.5A load current
Operates from 2.2V to 5.5V input supply
Low Ground current (330µA at 1.5A Load)
Minimal output capacitance required
Current Limit Protection
Thermal Overload Protection
Reverse Voltage Protection
Thermally enhanced 8-pin SOIC package
Lead-free versions available
An Enable control pin (EN) allows the device to be
placed in a low current mode.
Applications
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The CM3003 devices are fully protected, offering both
overload current limiting, short circuit protection and
high temperature thermal shutdown. These devices
also includes reverse voltage protection that minimizes
any reverse current flow back into the output pin.
Low Voltage "Core" processors
Graphics Cards
Gigabit NIC Cards
PC Motherboards
Notebooks
The CM3003 devices are housed in a space saving, 8pin power SOIC packages which has been thermally
enhanced (integral leadframe) to ensure maximum
junction to ambient power dissipation.
The CM3003 devices are available with optional leadfree finishing.
Typical Application Circuit
Simplified Electrical Schematic
IN
Controller
CM3003
2.2V - 5.5V
VIN
[email protected]
IN
10µF
VOUT
OUT
ADJ
EN
2.2V-5.5V
GND
EN
100nF 10µF
Over Current
Short Circuit
Over Temp
1.2V Reference
Voltage
+
EN
2.5V Output when ADJ = GND
GND
Automatically selects Adjustable Output
(when external resistors are present)
1.5 AMP
Fixed
130K
OUT
ADJ
Adj
120K
GND
© 2004 California Micro Devices Corp. All rights reserved.
01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
1
CM3003
PACKAGE / PINOUT DIAGRAM
TOP VIEW
EN
IN
OUT
ADJ
1
8
2
7
3
6
4
5
GND
GND
GND
GND
8-pin Power SOIC
Note: This drawing is not to scale.
PIN DESCRIPTIONS
PIN(S)
NAME
DESCRIPTION
1
EN
Enable/shutdown input. When EN is asserted high (VEN ≥ 1.2V), the regulator is enabled. When EN
is asserted low (VEN ≤0.4V), the regulator is shut down.
2
IN
Positive input voltage for the regulator. If this input pin is greater than 2 inches from the main input
filter, a 10µF ceramic capacitor is recommended for adequate filtering.
3
OUT
The regulated voltage output. An output capacitor of 10µF is recommended to minimize any transient load disturbances under normal operating conditions. Additional output capacitance can be
used to further improve transient load response.
4
ADJ
Feedback input. When ADJ is grounded, the device enters fixed voltage mode. When ADJ is connected to an external resistor network, the device operates as an adjustable regulator. The Adjust
pin can also be tied directly to the OUT pin which configures the CM3003 as a 1.2V regulator.
5-8
GND
The negative reference for all voltages. Also functions as a thermal path for heat dissipation.
Ordering Information
PART NUMBERING INFORMATION
Standard Finish
Ordering Part
Lead-free Finish
Ordering Part
Pins
Output Voltage
Package
Number1
Part Marking
Number1
Part Marking
8
2.5
SOIC-8
CM3003-25SA
CM3003-25SA
CM3003-25SF
CM3003-25SF
8
1.8
SOIC-8
CM3003-18SA
CM3003-18SA
CM3003-18SF
CM3003-18SF
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
© 2004 California Micro Devices Corp. All rights reserved.
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
01/15/04
CM3003
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER
ESD Protection (HBM)
Pin Voltages
IN, OUT, ADJ, EN
RATING
UNITS
±2000
V
[GND - 0.4] to +6.0
V
Storage Temperature Range
-40 to +150
°C
Operating Temperature Range
Ambient
Junction
-40 to +85
-40 to +150
°C
°C
Power Dissipation (See note 1)
Internally Limited
W
Note 1: The SOIC package used is thermally enhanced through the use of a fused integral leadframe. The power rating is based on
a printed circuit board heat spreading capability equivalent to 2 square inches of copper connected to the GND pins. Typical
multi-layer boards using power plane construction will provide this heat spreading ability without the need for additional dedicated copper area. (Please consult with factory for thermal evaluation assistance)
STANDARD OPERATING CONDITIONS
PARAMETER
VIN
VALUE
UNITS
2.2 to 5.5
V
Ambient Operating Temperature Range
0 to +85
°C
Load Current
0 to 1500
mA
CEXT
10 +20%
µF
© 2004 California Micro Devices Corp. All rights reserved.
01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
3
CM3003
ELECTRICAL OPERATING CHARACTERISTICS (SEE NOTE 1)
SYMBOL
VOUT
VREF
PARAMETER
CONDITIONS
Regulator Output Voltage
CM3003-25
CM3003-18
0mA < ILOAD < 1.5A, VIN=3.3V, VADJ=0V
Internal Reference Voltage
MIN
TYP
MAX
UNITS
2.40
1.73
2.50
1.80
2.60
1.87
V
1.15
1.20
1.25
V
ILIM
Overload Current Limit
VOUT > 1.2V
2.2
3.0
3.8
A
ISC
Short Circuit Current Limit
VOUT < 0.2V
0.5
1.2
1.8
A
VR LOAD
Load Regulation
VIN=3.3V, 100mA < ILOAD < 1.5A
5
mV
VR LINE
Line Regulation xx
ILOAD = 5mA; 3.0V < VIN < to 5.0V
20
mV
VDROPOUT
Dropout Voltage
ILOAD = 100mA
ILOAD = 1.0A
ILOAD = 1.5A
25
250
330
45
450
670
mV
mV
mV
IGND
Ground Current
Regulator Disabled (EN=GND); VIN=3.3V
Regulator Enabled (EN=VIN=3.3V); ILOAD= 0mA
Regulator Enabled (EN=VIN=3.3V); ILOAD= 1.5A
5
325
330
30
500
550
µA
µA
µA
IROUT
Output Reverse Leakage
VOUT=3.3V; VIN = 0V
30
100
µA
TDISABLE
THYST
Shutdown Temperature
Thermal Hysteresis
160
25
°C
°C
Enable Pin Input
VEN_TH
IEN
EN Input Threshold
Voltage
Regulator Enabled
Enable Input Leakage
Current
0V < VEN < 5.5V
0.4
0.8
1.2
V
0.1
5
µA
0.2
0.3
V
0.1
1
µA
Adjust Pin Input (output set by external resistors)
VADJ_TH
IEN
ADJ Input Threshold
Voltage
ADJ Input Leakage
Current
0.1
VADJ > 1.1V
Note 1: Operating Characteristics are over Standard Operating Conditions unless otherwise specified.
© 2004 California Micro Devices Corp. All rights reserved.
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
01/15/04
CM3003
Application Information
CM3003-XX
VIN
3.3V
1.5A
10µF
IN
OUT
EN
ADJ
GND
VOUT
R1
100nF 10µF
R2
GND
Figure 1. Application Circuit for Adjustable Output Operation.
Output Voltage = 1.20 (R1+R2) / R2 [VOLTS]
© 2004 California Micro Devices Corp. All rights reserved.
01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
5
CM3003
Performance Information
CM3003 Typical DC Characteristics (TA=25°C, EN=VIN=3.3V, CIN=COUT=10uF, unless specified otherwise)
CM3003-25 Device Specfic Data
Output versus Adjust pin (2.5V)
Output Voltage (10mA Load) with Supply
4
OUTPUT VOLTAGE [V]
OUTPUT VOLTAGE [V]
4.0
3.0
2.0
1.0
3
2
1
0.0
0
0.0
1.0
2.0
3.0
SUPPLY VOLTAGE [V]
4.0
5.0
0.0
Ground Current with Enable Voltage
400
400
350
350
300
250
200
150
100
50
0.4 0.6 0.8 1.0 1.2
ADJUST PIN VOLTAGE [V]
1.4
1.6
300
250
200
150
100
50
0
0
0
0
1
2
ENABLE VOLTAGE [V]
1
3
Ground Current with Output Load
2
3
SUPPLY VOLTAGE [V]
4
5
Internal Reference Voltage with Supply
1.23
REFERENCE VOLTAGE [v]
400
GROUND CURRENT [uA]
0.2
Ground Current with Supply (EN = VIN)
GROUND CURRENT [uA]
GROUND CURRENT [uA]
VIN=EN=3.3V
Feedback open
380
360
340
320
300
0.0
0.5
1.0
1.5
2.0
2.5
LOAD CURRENT [Amps]
3.0
1.22
1.21
1.20
1.19
1.18
1.17
1.5
2.0
2.5 3.0 3.5 4.0
SUPPLY VOLTAGE [V]
4.5
5.0
© 2004 California Micro Devices Corp. All rights reserved.
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
01/15/04
CM3003
Performance Information (cont’d)
CM3003 Typical DC Characteristics (TA=25°C, EN=VIN=3.3V, CIN=COUT=10uF, unless specified otherwise)
CM3003-25 Device Specfic Data
Load Regulation
Line Regulation (2.5V, 10mA Load)
2.60
2.53
2.56
OUTPUT VOLTAGE [V]
OUTPUT VOLTAGE [V]
2.58
2.54
2.52
2.50
2.48
2.46
2.44
2.42
2.40
2.0
2.5
3.0
3.5
4.0
SUPPLY VOLTAGE [V]
4.5
2.52
2.51
2.50
2.49
2.48
2.47
5.0
0.0
Dropout Voltage (0.5A) with Supply
DROPOUT VOLTAGE [mV]
400
250
200
150
100
50
0.5A Load
0
350
300
250
200
150
100
VIN=3.3V
(Adjust Mode)
50
0
2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0
0.0
0.5
1.0
1.5
LOAD CURRENT [Amps]
SUPPLY VOLTAGE [V]
Current limit protection
2.0
Current limit with input voltage
4.0
OVERLOAD CURRENTS [A]
2.6
OUTPUT VOLTAGE [V]
2.5
Dropout Voltage with Load
300
DROPOUT VOLTAGE [mV]
0.5
1.0
1.5
2.0
LOAD CURRENT [Amps]
2.5
2.4
2.3
2.2
2.1
Vdd = 3.3V
2.0
0.0
0.5
1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT [A]
3.5
4.0
ADJ = 0V
Vout=2.4V
3.0
DROPOUT
2.0
1.0
Vout=0.1V
(Short Circuit)
0.0
2.5
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE [V]
5.0
5.5
© 2004 California Micro Devices Corp. All rights reserved.
01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
7
CM3003
Performance Information (cont’d)
CM3003 Transient Characteristics (TA=25°C, EN=VIN=3.3V, CIN=COUT=10uF, unless specified otherwise)
CM3003-25 Device Specific Data
Cold Start Power-Up/Down with 10mA Load
Cold Start Power-Up/Down with 1.5A Load
Enable Power-Up with 10mA Load
Enable Power-Up with 1.5A Load
Power Supply Rejection with 1.5A Load
60
60
50
50
SUPPLY REJECTION [dB]
SUPPLY REJECTION [dB]
Power Supply Rejection with 25mA Load
40
30
VOUT=2.5V
25mA Load
COUT=10uF
20
10
40
30
VOUT=2.5V
1.5A Load
COUT=10uF
20
10
0
0
10
100
1000
10000
FREQUENCY [Hz]
100000 1000000
10
100
1000
10000
100000 1000000
FREQUENCY [Hz]
© 2004 California Micro Devices Corp. All rights reserved.
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
01/15/04
CM3003
Performance Information (cont’d)
CM3003 Transient Characteristics (TA=25°C, EN=VIN=3.3V, CIN=COUT=10uF, unless specified otherwise)
CM3003-25 Device Specific Data
Line Transient Response with 25mA Load
Load Transient Response (25mA to 1A)
Line Transient Response with 1.5A Load
Load Transient Response (100mA to 1.5A)
© 2004 California Micro Devices Corp. All rights reserved.
01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
9
CM3003
Performance Information (cont’d)
CM3003 Typical Thermal Characteristics
and the second path is case to ambient (θ CA) thermal
resistance which is dependent on board layout. The
final operating junction temperature for any set of conditions can be estimated by the following thermal equation:
TJUNC = TAMB + PD (θ JC) + PD (θCA)
Internal Reference Voltage over Temperature
1.22
REFERENCE VOLTAGE [v]
The overall junction to ambient thermal resistance
(θJA) for device power dissipation (PD) consists primarily of two paths in series. The first path is the junction
to the case (θ JC) which is defined by the package style,
= TAMB + PD (θJA)
1.21
1.20
1.19
1.18
1.17
0
Based on a typical operating power dissipation of 1.0W
(3.0V-2.5Vx 2.0A) with an ambient of 70°C, the resulting junction temperature will be:
TJUNC = TAMB + PD (θJA)
= 70°C + 1.0W X (50°C/W)
75
100
125
150
Output Voltage (2.5V) over Temperature
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
2.45
5mA Load
0
Thermal characteristics were measured using a double
sided board with two square inches of copper area
connected to the GND pin for "heat spreading".
25
50
75
100 125 150
o
TEMPERATURE [ C]
Ground Current over Temperature
350
GROUND CURRENT [uA]
Note: The use of multi-layer board construction with
separate ground and power planes will further enhance
the overall thermal performance. In the event of no
copper area being dedicated for heat spreading, a
multi-layer board construction, using only the minimum
size pad layout, will provide the CM3003 with an overall
θJA of 70°C/W which allows up to 800mW to be safely
dissipated for the maximum junction temperature.
50
o
= 70°C + 50°C = 120°C
Measurements showing performance up to junction
temperature of 125°C were performed under light load
conditions (5mA). This allows the ambient temperature
to be representative of the internal junction temperature.
25
TEMPERATURE [ C]
OUTPUT VOLTAGE [v]
The CM3003 uses a thermally enhanced package
where all the GND pins (5 through 8) are integral to the
leadframe. When this package is mounted on a double
sided printed circuit board with two square inches of
copper allocated for "heat spreading", the resulting θJA
is about 50°C/W.
340
330
320
310
300
0
25
50
75
100
125 150
o
TEMPERATURE [ C]
© 2004 California Micro Devices Corp. All rights reserved.
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
01/15/04
CM3003
Mechanical Details
SOIC-8 Mechanical Specifications
Dimensions for CM3003 devices packaged in 8-pin
SOIC packages are presented below.
Mechanical Package Diagrams
For complete information on the SOIC-8 package, see
the California Micro Devices SOIC Package Information document.
TOP VIEW
D
8
7
6
5
PACKAGE DIMENSIONS
Package
Pins
Dimensions
H
SOIC
Pin 1
Marking
E
8
Millimeters
Inches
Min
Max
Min
Max
A
1.35
1.75
0.053
0.069
A1
0.10
0.25
0.004
0.010
B
0.33
0.51
0.013
0.020
C
0.19
0.25
0.007
0.010
D
4.80
5.00
0.189
0.197
1
2
3
4
SIDE VIEW
E
e
3.80
4.19
0.150
1.27 BSC
A
A1
SEATING
PLANE
B
0.165
e
0.050 BSC
H
5.80
6.20
0.228
0.244
L
0.40
1.27
0.016
0.050
# per tube
100 pieces*
# per tape
and reel
2500 pieces
Controlling dimension: inches
END VIEW
C
L
* This is an approximate number which may vary.
Package Dimensions for SOIC-8
© 2004 California Micro Devices Corp. All rights reserved.
01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com
11