CM3003 1.5 Amp Dual Mode Low Dropout CMOS Regulator Features 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. 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 • • • • • 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 1.8V/[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. 2 430 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. 4 430 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. 6 430 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. 8 430 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. 10 430 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