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CM3003 1.5 Amp Dual Mode Low Dropout CMOS Regulator
Features
* * * * * * * * * * Adjustable Output or Internally Fixed 375mV dropout at 1.5A load current Operates from 2.2V to 5.5V input supply Low Ground current (330A 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
Product Description
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. An Enable control pin (EN) allows the device to be placed in a low current mode.
Applications
* * * * * Low Voltage "Core" processors Graphics Cards Gigabit NIC Cards PC Motherboards Notebooks
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. 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
2.2V-5.5V Controller
CM3003
2.2V - 5.5V VIN 10F IN EN GND OUT ADJ 100nF 10F 1.8V/2.5V@1.5A VOUT EN
Over Current Short Circuit Over Temp
1.2V Reference Voltage
+
EN
GND
2.5V Output when ADJ = GND Automatically selects Adjustable Output (when external resistors are present)
Fixed Adj 120K 130K
1.5 AMP
OUT ADJ
GND
(c) 2004 California Micro Devices Corp. All rights reserved. 01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com
1
CM3003
PACKAGE / PINOUT DIAGRAM
TOP VIEW
EN IN OUT ADJ
1 2 3 4 8 7 6 5
GND GND GND GND
8-pin Power SOIC
Note: This drawing is not to scale.
PIN DESCRIPTIONS
PIN(S) 1 2 3 NAME EN IN OUT DESCRIPTION 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. Positive input voltage for the regulator. If this input pin is greater than 2 inches from the main input filter, a 10F ceramic capacitor is recommended for adequate filtering. The regulated voltage output. An output capacitor of 10F is recommended to minimize any transient load disturbances under normal operating conditions. Additional output capacitance can be used to further improve transient load response. 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. The negative reference for all voltages. Also functions as a thermal path for heat dissipation.
4
ADJ
5-8
GND
Ordering Information
PART NUMBERING INFORMATION
Standard Finish Ordering Part Pins 8 8 Output Voltage 2.5 1.8 Package SOIC-8 SOIC-8 Number1 CM3003-25SA CM3003-18SA Part Marking CM3003-25SA CM3003-18SA Lead-free Finish Ordering Part Number1 CM3003-25SF CM3003-18SF Part Marking CM3003-25SF CM3003-18SF
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
(c) 2004 California Micro Devices Corp. All rights reserved.
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com
01/15/04
CM3003
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER ESD Protection (HBM) Pin Voltages IN, OUT, ADJ, EN Storage Temperature Range Operating Temperature Range Ambient Junction Power Dissipation (See note 1) RATING 2000 [GND - 0.4] to +6.0 -40 to +150 -40 to +85 -40 to +150 Internally Limited UNITS V V C C C 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 Ambient Operating Temperature Range Load Current CEXT VALUE 2.2 to 5.5 0 to +85 0 to 1500 10 +20% UNITS V C mA F
(c) 2004 California Micro Devices Corp. All rights reserved. 01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com
3
CM3003
ELECTRICAL OPERATING CHARACTERISTICS (SEE NOTE 1)
SYMBOL VOUT PARAMETER Regulator Output Voltage CM3003-25 CM3003-18 Internal Reference Voltage Overload Current Limit Short Circuit Current Limit Load Regulation Line Regulation xx Dropout Voltage VOUT > 1.2V VOUT < 0.2V VIN=3.3V, 100mA < ILOAD < 1.5A ILOAD = 5mA; 3.0V < VIN < to 5.0V ILOAD = 100mA ILOAD = 1.0A ILOAD = 1.5A Regulator Disabled (EN=GND); VIN=3.3V Regulator Enabled (EN=VIN=3.3V); ILOAD= 0mA Regulator Enabled (EN=VIN=3.3V); ILOAD= 1.5A VOUT=3.3V; VIN = 0V CONDITIONS 0mA < ILOAD < 1.5A, VIN=3.3V, VADJ=0V 2.40 1.73 1.15 2.2 0.5 2.50 1.80 1.20 3.0 1.2 5 20 25 250 330 5 325 330 30 160 25 45 450 670 30 500 550 100 2.60 1.87 1.25 3.8 1.8 V V A A mV mV mV mV mV A A A A C C MIN TYP MAX UNITS
VREF ILIM ISC VR LOAD VR LINE VDROPOUT
IGND
Ground Current
IROUT TDISABLE THYST
Output Reverse Leakage Shutdown Temperature Thermal Hysteresis
Enable Pin Input
VEN_TH IEN EN Input Threshold Voltage Enable Input Leakage Current Regulator Enabled 0V < VEN < 5.5V 0.4 0.8 0.1 1.2 5 V A
Adjust Pin Input (output set by external resistors)
VADJ_TH IEN ADJ Input Threshold Voltage ADJ Input Leakage Current VADJ > 1.1V 0.1 0.2 0.1 0.3 1 V A
Note 1: Operating Characteristics are over Standard Operating Conditions unless otherwise specified.
(c) 2004 California Micro Devices Corp. All rights reserved.
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com
01/15/04
CM3003
Application Information
CM3003-XX
VIN 3.3V IN EN
10F
1.5A OUT ADJ GND
R2 R1 100nF 10F
VOUT
GND
Figure 1. Application Circuit for Adjustable Output Operation. Output Voltage = 1.20 (R1+R2) / R2 [VOLTS]
(c) 2004 California Micro Devices Corp. All rights reserved. 01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com
5
CM3003
Performance Information
CM3003 Typical DC Characteristics (TA=25C, EN=VIN=3.3V, CIN=COUT=10uF, unless specified otherwise) CM3003-25 Device Specfic Data
Output Voltage (10mA Load) with Supply
4.0
4
Output versus Adjust pin (2.5V)
OUTPUT VOLTAGE [V]
3.0
OUTPUT VOLTAGE [V]
3
2.0
2
1.0
1
VIN=EN=3.3V Feedback open
0.0 0.2 0.4 0.6 0.8 1.0 1.2 ADJUST PIN VOLTAGE [V] 1.4 1.6
0.0 0.0 1.0 2.0 3.0 SUPPLY VOLTAGE [V] 4.0 5.0
0
Ground Current with Enable Voltage
400
Ground Current with Supply (EN = VIN)
400 350 300 250 200 150 100 50 0 0 1 2 3 SUPPLY VOLTAGE [V] 4 5
GROUND CURRENT [uA]
300 250 200 150 100 50 0 0 1 2 ENABLE VOLTAGE [V] 3
Ground Current with Output Load
400
GROUND CURRENT [uA]
350
Internal Reference Voltage with Supply
1.23
REFERENCE VOLTAGE [v]
GROUND CURRENT [uA]
380 360 340 320 300
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
0.0
0.5
1.0
1.5
2.0
2.5
3.0
LOAD CURRENT [Amps]
(c) 2004 California Micro Devices Corp. All rights reserved.
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com
01/15/04
CM3003
Performance Information (cont'd)
CM3003 Typical DC Characteristics (TA=25C, EN=VIN=3.3V, CIN=COUT=10uF, unless specified otherwise) CM3003-25 Device Specfic Data
Line Regulation (2.5V, 10mA Load)
2.60 2.58
OUTPUT VOLTAGE [V]
Load Regulation
2.53
OUTPUT VOLTAGE [V]
2.56 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 5.0
2.52 2.51 2.50 2.49 2.48 2.47 0.0 0.5 1.0 1.5 2.0 LOAD CURRENT [Amps] 2.5
Dropout Voltage (0.5A) with Supply
300
DROPOUT VOLTAGE [mV]
Dropout Voltage with Load
400
DROPOUT VOLTAGE [mV]
250 200 150 100 50 0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 SUPPLY VOLTAGE [V]
350 300 250 200 150 100 50 0 0.0 0.5 1.0 1.5 LOAD CURRENT [Amps] 2.0
0.5A Load
VIN=3.3V (Adjust Mode)
Current limit protection
2.6 2.5 2.4 2.3 2.2 2.1
Vdd = 3.3V
Current limit with input voltage
4.0
OVERLOAD CURRENTS [A]
ADJ = 0V Vout=2.4V
OUTPUT VOLTAGE [V]
3.0 DROPOUT 2.0
1.0
Vout=0.1V (Short Circuit)
2.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT CURRENT [A] 3.5 4.0
0.0 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE [V] 5.0 5.5
(c) 2004 California Micro Devices Corp. All rights reserved. 01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com
7
CM3003
Performance Information (cont'd)
CM3003 Transient Characteristics (TA=25C, 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 25mA Load
60
Power Supply Rejection with 1.5A Load
60
SUPPLY REJECTION [dB]
SUPPLY REJECTION [dB]
50 40 30 20 10 0 10 100 1000 10000 FREQUENCY [Hz] 100000 1000000
50 40 30 20 10 0 10 100 1000 10000 100000 1000000
VOUT=2.5V 25mA Load COUT=10uF
VOUT=2.5V 1.5A Load COUT=10uF
FREQUENCY [Hz]
(c) 2004 California Micro Devices Corp. All rights reserved.
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com
01/15/04
CM3003
Performance Information (cont'd)
CM3003 Transient Characteristics (TA=25C, EN=VIN=3.3V, CIN=COUT=10uF, unless specified otherwise) CM3003-25 Device Specific Data
Line Transient Response with 25mA Load
Line Transient Response with 1.5A Load
Load Transient Response (25mA to 1A)
Load Transient Response (100mA to 1.5A)
(c) 2004 California Micro Devices Corp. All rights reserved. 01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com
9
CM3003
Performance Information (cont'd)
CM3003 Typical Thermal Characteristics The overall junction to ambient thermal resistance (JA) for device power dissipation (PD) consists primarily of two paths in series. The first path is the junction to the case ( JC) which is defined by the package style, and the second path is case to ambient ( 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 ( JC) + PD (CA) = TAMB + PD (JA) 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 JA is about 50C/W. Based on a typical operating power dissipation of 1.0W (3.0V-2.5Vx 2.0A) with an ambient of 70C, the resulting junction temperature will be: TJUNC = TAMB + PD (JA) = 70C + 1.0W X (50C/W) = 70C + 50C = 120C Thermal characteristics were measured using a double sided board with two square inches of copper area connected to the GND pin for "heat spreading". Measurements showing performance up to junction temperature of 125C were performed under light load conditions (5mA). This allows the ambient temperature to be representative of the internal junction temperature. 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 JA of 70C/W which allows up to 800mW to be safely dissipated for the maximum junction temperature.
350
GROUND CURRENT [uA]
Internal Reference Voltage over Temperature
1.22
REFERENCE VOLTAGE [v]
1.21 1.20 1.19 1.18 1.17 0 25 50 75 100
o
125
150
TEMPERATURE [ C]
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 0 25 50 75
OUTPUT VOLTAGE [v]
5mA Load
100 125 150
o
TEMPERATURE [ C]
Ground Current over Temperature
340 330 320 310 300 0 25 50 75 100
o
125 150
TEMPERATURE [ C]
(c) 2004 California Micro Devices Corp. All rights reserved.
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430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L 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. For complete information on the SOIC-8 package, see the California Micro Devices SOIC Package Information document. Mechanical Package Diagrams
TOP VIEW
D
8 7 6 5
PACKAGE DIMENSIONS
Package Pins Dimensions A A1 B C D E e H L # per tube # per tape and reel Millimeters Min 1.35 0.10 0.33 0.19 4.80 3.80 5.80 0.40 Max 1.75 0.25 0.51 0.25 5.00 4.19 6.20 1.27 Min 0.053 0.004 0.013 0.007 0.189 0.150 0.228 0.016 SOIC 8 Inches Max 0.069 0.010
SIDE VIEW 1 2 3 4
H
Pin 1 Marking
E
0.020 0.010 0.197 0.165 0.244 0.050
C
END VIEW SEATING PLANE
A A1 B e
1.27 BSC
0.050 BSC
100 pieces* 2500 pieces Controlling dimension: inches
L
* This is an approximate number which may vary.
Package Dimensions for SOIC-8
(c) 2004 California Micro Devices Corp. All rights reserved. 01/15/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com
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