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PRELIMINARY CM3065 2.0 Amp Tri-Mode Low Dropout CMOS Regulator
Features
* * * * * * * * * * * Operates as an adjustable output or a fixed output regulator with 2 output voltage options 1.8V or 2.5V fixed output voltage versions 360mV dropout at 2.0A load current Operates from 2.2V to 5.5V input supply Low Ground current (350A at 2.0A Load) Stable with low ESR ceramic output capacitor Current limit protection Thermal overload protection Reverse voltage protection Thermally enhanced 8-lead SOIC or 3-lead TO263 package Lead-free versions available
Product Description
The CM3065 family of very low dropout regulators offers both fixed/adjustable-output and fixed-output operation capable of delivering up to 2A of current. The CM3065 devices are fully protected, offering overload current limiting, short circuit protection, high temperature thermal shutdown, and reverse voltage protection to minimize reverse current flow into the output pin. The CM3065-xxSA/SF (8-lead, SOIC packaged) devices operate in either adjustable or fixed output modes. When the ADJ input is grounded, the regulator operates as a fixed output voltage device at the specified output voltage. When the ADJ input is connected to an external resistor network the device operates as an adjustable regulator. The ADJ input can also be tied directly to the OUT pin which configures the CM3065 as a 1.2V regulator. The CM3065-xxSA/SF devices feature an Enable control input (EN), which when set low, disables the device to a low quiescent current mode. The CM3065-xxTO/TN (TO-263 packaged) versions operate as higher power, fixed output voltage devices and are available with 1.8V or 2.5V outputs voltages only. The CM3065 is available in a space saving, 8-lead power SOIC which has been thermally enhanced with an integral leadframe to ensure maximum junction to ambient power dissipation, or a 3-lead TO-263 package. Both packages are offered with optional lead-free finishing.
Applications
* * * * * Low voltage "Core" processors Graphics cards Gigabit NIC cards PC motherboards Notebook computers
Typical Application Circuit
CM3065-xxSA/SF
Simplified Electrical Schematic
(See notes below for TO-263 devices.)
2.2V-5.5V Controller Over Current Short Circuit Over Temp
IN
VIN
3.3V
IN EN
OUT ADJ GND
R2 R1
2.0A
VOUT
EN (Note 1)
10F
100nF 10F
1.2V Reference Voltage
+
EN
GND
Fixed Output when ADJ = GND Automatically selects Adjustable Output (when external resistors are present)
Fixed Adj 120K 130K
2..0 AMP
OUT ADJ (Note 2)
Note 1: EN pin is internally tied to VIN on CM3065-xxTO/TN devices Note 2: ADJ pin is internally tied to GND on CM3065-xxTO/TN devices.
(c) 2004 California Micro Devices Corp. All rights reserved. 08/16/04
GND
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
1
PRELIMINARY CM3065
PACKAGE / PINOUT DIAGRAM
TOP VIEW
EN IN OUT ADJ
1 2 3 4 8 7 6 5
TOP VIEW
CM3065-XXTX
GND GND GND GND
IN GND OUT
1 2 3
8-lead Power SOIC
Note: These drawings are not to scale.
CM3065 XXSX
Note: Tab (on back) is GND
3-lead TO-263
PIN DESCRIPTIONS
TO-263 LEAD(S) 1 2, TAB 3 SOIC-8 LEAD(S) 2 5-8 3 NAME IN GND OUT DESCRIPTION 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 negative reference for all voltages. Also functions as a thermal path for heat dissipation. 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. 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. 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 CM3065 as a 1.2V regulator.
-----
1 4
EN ADJ
Ordering Information
PART NUMBERING INFORMATION
Standard Finish LEADS/ PINS 8 8 3 3 Output Voltage 2.5 1.8 2.5 1.8 Package SOIC-8 SOIC-8 TO-263 TO-263 Ordering Part Number1 CM3065-25SA CM3065-18SA CM3065-25TO CM3065-18TO Part Marking CM3065-25SA CM3065-18SA CM3065-25TO CM3065-18TO Lead-free Finish Ordering Part Number1 CM3065-25SF CM3065-18SF CM3065-25TN CM3065-18TN Part Marking CM3065-25SF CM3065-18SF CM3065-25TN CM3065-18TN
Note 1: TO-263 packaged parts are fixed output. Note 2: 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
08/16/04
PRELIMINARY CM3065
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 COUT VALUE 2.2 to 5.5 -40 to +85 0 to 2000 10 20% UNITS V C mA F
(c) 2004 California Micro Devices Corp. All rights reserved. 08/16/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
3
PRELIMINARY CM3065
ELECTRICAL OPERATING CHARACTERISTICS (SEE NOTE 1)
SYMBOL VOUT PARAMETER Regulator Output Voltage CM3065-25 CM3065-18 ILIM ISC VR LOAD VR LINE Overload Current Limit Short Circuit Current Limit Load Regulation Line Regulation xx VOUT > 1.2V VOUT < 0.2V VIN=[VOUT + 0.8V], 100mA ILOAD 1.5A VIN=[VOUT + 0.8V], 100mA ILOAD 2.0A ILOAD = 5mA; 3.0V VIN to 5.0V ILOAD = 100mA ILOAD = 1.0A ILOAD = 1.5A ILOAD = 2.0A IGND Ground Current Regulator Disabled (EN=GND); VIN=3.3V; Note 2 Regulator Enabled (EN=VIN=[VOUT + 0.8V]); ILOAD= 0mA; Note 2 Regulator Enabled (EN=VIN=[VOUT + 0.8V]); ILOAD= 1.5A; Note 2 Regulator Enabled (EN=VIN=[VOUT + 0.8V]); ILOAD= 2.0A; Note 2 IROUT TDISABLE THYST VTH_EN IEN Output Reverse Leakage Shutdown Temperature Thermal Hysteresis VOUT=3.3V; VIN = 0V VDROPOUT Dropout Voltage CONDITIONS 0mA < ILOAD < 2.0A, VIN [VOUT + 0.8V], VADJ=0V 2.45 1.764 2.2 0.5 2.50 1.80 3.0 1.2 0.2 0.3 0.2 18 180 270 360 5 325 330 350 30 160 25 2.55 1.836 3.8 1.8 0.4 0.6 0.4 45 450 600 700 30 500 550 600 100 V V A A % % % mV mV mV mV A A A A A C C MIN TYP MAX UNITS
Enable Pin Input (CM3065-xxSA only)
EN Input Threshold Voltage EN Input Leakage Current Note 2 0V < VEN < 5.5V; Note 2 0.4 0.1 1.2 5 V A
Adjust Pin Input (output set by external resistors, CM3065-xxSA only)
VTH_ADJ IEN ADJ Input Threshold Volt- Note 2 age ADJ Input Leakage Current VADJ > 1.1V; Note 2 0.1 0.2 0.1 0.3 1 V A
Note 1: Operating Characteristics are over Standard Operating Conditions unless otherwise specified. Note 2: Applies for CM3065-xxSA devices only.
(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
08/16/04
PRELIMINARY CM3065
Mechanical Details
The CM3065 is available in either an 8-lead SOIC or a 3-lead TO-263 package. SOIC-8 Mechanical Specifications Dimensions for CM3065 devices 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.
H
Pin 1 Marking 8
Mechanical Package Diagrams
TOP VIEW
D
7 6 5
E
PACKAGE DIMENSIONS
Package Leads 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
END VIEW SEATING PLANE SIDE VIEW 1 2 3 4
A B e
A1
1.27 BSC
0.050 BSC 0.244 0.050
L C
100 pieces* 2500 pieces Controlling dimension: inches
Package Dimensions for SOIC-8
* This is an approximate number which may vary.
(c) 2004 California Micro Devices Corp. All rights reserved. 08/16/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
5
PRELIMINARY CM3065
Mechanical Details (cont'd)
TO-263-3 Mechanical Specifications Dimensions for CM3065 devices supplied in a 3-lead TO-263 package are presented below. For complete information on the TO-263-3 package, see the California Micro Devices TO-263 Package Information document.
TOP VIEW
Mechanical Package Diagrams
E L2
D L
PACKAGE DIMENSIONS
Package Leads Dimensions A b b2 c c2 D D1 E E1 e L L1 L2 L4 # per tube # per tape and reel Millimeters Min 4.06 0.508 1.14 0.457 1.14 8.64 8.00 9.65 6.22 14.60 2.29 --Max 4.57 0.990 1.40 0.737 1.40 9.65 --10.29 --15.87 2.79 1.40 Min 0.160 0.020 0.045 0.018 0.045 0.340 0.315 0.380 0.245 0.575 0.090 ---
1
2
3
TO-263
3 Inches Max 0.190 0.039 0.055 0.029 0.055 0.380 --0.405 --c BACK VIEW D1 SIDE VIEW E1 e b2 b
A c2
2.54 BSC
0.100 BSC 0.625 0.110 0.055
0 -8 L1 L4
SEATING PLANE
LEADFORM
0.254 BSC 100 pieces*
0.010 BSC
2500 pieces Controlling dimension: inches
* This is an approximate amount which may vary.
Package Dimensions for TO-263-3.
(c) 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
08/16/04

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