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PRELIMINARY CM3004 1.0 Amp Dual Mode Low-Dropout CMOS Regulator
Features
* * * * * * * * * * * Internally fixed or adjustable output modes 250mV dropout at 1.0A load current Operates from 1.7V to 5.5V input supply Low Ground current (330A at 1.0A Load) Minimal output capacitance required Stable with low ESR ceramic output capacitors Current limit protection Thermal overload protection Reverse current protection in shutdown Thermally enhanced 8-lead SOIC package Lead-free version available
Product Description
The CM3004 is a very-low-dropout regulator that offers both fixed output and fixed/adjustable operating modes. When the Adjust control pin (ADJ) is grounded, this device automatically enters a fixed voltage mode delivering 2.5V out at 1.0A. 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 CM3004 as a 1.2V regulator. An Enable control pin (EN) allows the device to be placed in a low-current mode. The CM3004 is fully protected, offering both overload current limiting, short-circuit protection and high-temperature thermal shutdown. The CM3004 also includes protection against output to input current flow while in shutdown. The CM3004 is supplied in a space-saving, 8-lead power SOIC package which has been thermally enhanced via an integral leadframe to ensure maximum junction-to-ambient power dissipation. The CM3004 is also available with optional lead-free finishing.
Applications
* * * * * * * * Low-voltage "Core" processors Set top boxes DVD players Personal video recorders Graphics Cards Gigabit NIC Cards PC Motherboards Notebooks
Typical Application Circuits
CM3004
VIN 3.3V IN EN GND OUT ADJ 2.5V/1.0A VOUT
Simplified Electrical Schematic
IN
1.7V-5.5V Controller Over Current Short Circuit Over Temp
10F
100nF 10F
EN
GND
1.2V Reference Voltage
+
EN
CM3004
VIN 1.8V IN EN GND OUT ADJ 1.2V/1.0A
2.5V Output when ADJ = GND
VOUT
Automatically selects Adjustable Output (when external resistors are present)
Fixed Adj
1.0 AMP
OUT ADJ
10F
100nF 10F
GND
GND
(c) 2004 California Micro Devices Corp. All rights reserved. 01/10/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
1
PRELIMINARY CM3004
PACKAGE / PINOUT DIAGRAM
TOP VIEW
EN IN OUT ADJ
1 2 3 4 8 7 6 5
GND GND GND GND
8-Lead Power SOIC
Note: This drawing is not to scale.
PIN DESCRIPTIONS
LEAD(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 CM3004 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 Leads 8 Package SOIC-8 Ordering Part Number1 CM3004-25SA Part Marking CM3004 25SA Lead-free Finish Ordering Part Number1 CM3004-25SF Part Marking CM3004 25SF
Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.
(c) 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
01/10/05
PRELIMINARY CM3004
Specifications
ABSOLUTE MAXIMUM RATINGS
PARAMETER ESD Protection (HBM) Pin Voltages IN, OUT, ADJ, EN Storage Temperature Range Operating Temperature Range Junction Power Dissipation (See note 1) RATING 2000 [GND - 0.4] to +6.0 -40 to +150 -40 to +150 Internally Limited UNITS V V 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 1.7 to 5.5 -40 to +85 0 to 1000 10 20% UNITS V C mA F
(c) 2005 California Micro Devices Corp. All rights reserved. 01/10/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
3
PRELIMINARY CM3004
Specifications (cont'd)
ELECTRICAL OPERATING CHARACTERISTICS (SEE NOTE 1)
SYMBOL VOUT ILIM ISC VR LOAD VR LINE VDROPOUT IGND PARAMETER Regulator Output Voltage Overload Current Limit Short Circuit Current Limit Load Regulation Line Regulation xx Dropout Voltage Ground Current CONDITIONS 0mA < ILOAD < 1.0A, VIN=3.3V, VADJ=0V 0mA < ILOAD < 1.0A, VIN=1.8V, VADJ=VOUT VIN=3.3V,VOUT = 2.5V VOUT < 0.2V VIN=3.3V,VOUT = 2.5V, 100mA < ILOAD < 1.0A VIN=1.8V,VOUT = 1.2V, 100mA < ILOAD < 1.0A 3.0V < VIN < to 5.0V, VOUT = 2.5V, ILOAD = 5mA 1.7V < VIN < to 3.5V, VOUT = 1.2V, ILOAD = 5mA ILOAD = 100mA ILOAD = 1.0A EN tied to GND, VIN=3.3V EN=VIN=3.3V, VOUT = 2.5V, ILOAD= 0mA EN=VIN=3.3V, VOUT = 2.5V, ILOAD= 1.0A VOUT=3.3V; VIN = 0V MIN 2.40 1.15 2.2 0.5 TYP 2.50 1.20 3.0 1.2 5 5 5 5 25 250 5 325 330 30 160 25 MAX 2.60 1.25 3.8 1.8 20 20 20 20 45 450 30 500 550 100 UNITS V V A A mV mV mV mV mV mV A A A A C C
IROUT TDISABLE THYST VEN_TH IEN
Output Reverse Leakage Shutdown Temperature Thermal Hysteresis
Enable Pin Input
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 IADJ 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.
4
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
01/10/05
PRELIMINARY CM3004
Performance Information
Typical DC Characteristics nominal conditions unless specified otherwise) Nominal Conditions: CIN = 10F, COUT = 10F
1.25 2.6
Output Voltage (V)
1.20
Output Voltage (V) 1.7 1.8 2.0 2.5 3.0 3.3 3.5
2.55
2.5
2.45
1.15
2.4 3.0
Input Voltage (V)
4.0 Input Voltage (V)
5.0
Figure 1. Line Regulation, (ILOAD=5mA)
1.2
Figure 4. Line Regulation, (ILOAD=5mA)
2.6
Output Voltage (V)
1.25
Output Voltage (V)
2.55
2.5
2.45
1.15
2.4 0.0 0.5 Load Current (A) 1.0
0
0.5 Load Current (A)
1.0
Figure 2. Load Regulation (VIN = 1.8V)
1.4 1.2 Output Voltage (V) 1 0.8 0.6 0.4 0.2 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 Input Voltage (V)
Figure 5. Load Regulation (VIN = 3.3V)
3 Output Voltage (V) 2.5 2 1.5 1 0.5 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Figure 3. Operating Voltage Range (VOUT = 1.2V)
(c) 2005 California Micro Devices Corp. All rights reserved. 01/10/05
Figure 6. Operating Voltage Range (VOUT = 2.5V)
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
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PRELIMINARY CM3004
Performance Information (cont'd)
Typical Transient Characteristics (nominal conditions unless specified otherwise) Nominal Conditions: CIN = 10F, COUT = 10F
1.0A IOUT VOUT
1.0A
10mA
10mA
IOUT VOUT
VIN=1.8V, VOUT=1.2V CIN=10F ceramic, COUT=10F ceramic
VIN=3.3V, VOUT=2.5V CIN=10F ceramic, COUT=10F ceramic
Figure 7. Load Transient Step Response
IOUT=10mA, CIN=10F cer., COUT=10F cer. EN=0V
Figure 10. Load Transient Step Response
IOUT=10mA, CIN=10F cer., COUT=10F cer. EN=0V VOUT=2.5V
EN=1.8V=VIN
EN=3.3V=VIN
VOUT=1.2V
VOUT=0V
VOUT=0V
Figure 8. Enable/Disable Response
IOUT=1.0A, CIN=10F cer., COUT=10F cer. EN=0V
Figure 11. Enable/Disable Response
IOUT=1.0A, CIN=10F cer., COUT=10F cer. EN=0V
EN=1.8V=VIN
EN=3.3V=VIN
VOUT=1.2V
VOUT=2.5V
VOUT=0V
VOUT=0V
Figure 9. Enable/Disable Response
(c) 2004 California Micro Devices Corp. All rights reserved.
Figure 12. Enable/Disable Response
6
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
01/10/05
PRELIMINARY CM3004
Performance Information (cont'd)
CM3004 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
Output Voltage (V)
Tem perature vs. Output Voltage (1.2V) 1.25 1.23 1.21 1.19 1.17 1.15 -40 25 Tem perature ('C) 85
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 CM3004 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 with an ambient of 85C, the resulting junction temperature will be: TJUNC = TAMB + PD ( JA) = 85C + 1.0W (50C/W) = 85C + 50C = 135C Thermal characteristics were measured using a double sided board with two square inches of copper area connected to the GND pins for "heat spreading". Measurement was performed under light load conditions (5mA).
Temperature vs. Output Voltage ( 2.5V )
2.60
Output Voltage (V)
2.55
2.50
2.45
2.40 -40
-25
0
25
50
75
85
100
125
150
Tem perature ('C)
(c) 2005 California Micro Devices Corp. All rights reserved. 01/10/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
7
PRELIMINARY CM3004
Application Information
CM3004
VIN 3.3V IN EN OUT ADJ GND
R2 R1 100nF 10F
1.0A
VOUT
10F
GND
Figure 13. Application Circuit for Adjustable Output Operation. Output Voltage = 1.20 (R1+R2) / R2 [VOLTS]
(c) 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
01/10/05
PRELIMINARY CM3004
Mechanical Details
SOIC-8 Mechanical Specifications Dimensions for the CM3004 supplied in an 8-lead SOIC package 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 Lead 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 0.020 0.010 0.197 0.165 0.244 0.050
C
END VIEW SEATING PLANE SIDE VIEW 1 2 3 4
H
Pin 1 Marking
E
A B e
A1
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) 2005 California Micro Devices Corp. All rights reserved. 01/10/05
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
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