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CM1086
1.5A LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The CM1086 is a high performance low dropout regulator rated for 1.5A output current with fixed 2.5V/3.3V and adjustable output. It is designed for use in applications requiring low dropout characteristics over the rated current range. On chip trimming adjusts the reference voltage to 1%. These features are ideal for low voltage microprocessor applications requiring a regulated 2.5V to 3.6V power supply. In addition, the CM1086 provides the device protections including over current and thermal shutdown. Also, reverse battery protection scheme limits the reverse current when the input voltage falls below the output. ! ! ! ! ! !
FEATURES
! Three Terminal Adjustable or Fixed Voltages: 2.5V, 3.3V, and adjustable. Output Current of 1.5A Reverse Battery Protection Fast Transient Response Short Circuit Protection Internal Thermal Overload Protection TO-263 and TO-252 package available
APPLICATIONS
! ! ! Power Supplies Computer Add-On Cards Other Applications Requiring Low Dropout Voltage Over Rated Current
PIN CONFIGURATION
TO-252 Top View TO-263 Top View
V IN 3 2 1
GND/ADJ
VO UT
VOUT
VIN
G N D /A DJ
1
2
3
ORDERING INFORMATION
Package Type TO-252 CM1086KCN252 CM1086SCN252 CM1086CN252 TO-263 CM1086KCN263 CM1086SCN263 CM1086CN263 Operating Temperature Range (TA) 0 ~ +70 0 ~ +70 0 ~ +70 Output Voltage 2.5V 3.3V ADJ.
2002/02/05 Preliminary Rev. 2
Champion Microelectronic Corporation
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CM1086
1.5A LOW DROPOUT VOLTAGE REGULATOR
ABSOLUTE MAXIMUM RATINGS
Input Voltage ........................................................................ +13V ..................... 0 to +150 Operating Junction Temperature Range, TJ
Storage Temperature .................................................. -65 to +150 Lead Temperature (10 sec.) ......................................................... 260
POWER DISSIPATION TABLE
Package TO-252 TO-263 JA (/W) 80 45 Derating factor (mW/) TA >= 25 12.5 22.2 TA <= 25 Power rating (mW) 1562 2775 TA = 70 TA = 85 Power rating (mW) Power rating (mW) 1000 812 1776 1443
Note: 1. JA : Thermal Resistance-Junction to Ambient, DF: Derating factor, PO: Power consumption.
2.
Junction Temperature Calculation: TJ = TA + (PD x JA ), PO = DF x (TJ - TA) The JA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above assume no ambient airflow. JT : Thermal Resistance-Junction to Ambient, TC: case (Tab) temperature, TJ = TC + (PD x JA )
RESOMMENDED OPERATING CONDITIONS
Parameter Input Voltage Load Current (with adequate heatsinking) Input Capacitor (VIN to GND) Output Capacitor with ESR of 10 max. (VOUT to GND) Operating Ambient Temperature Range Junction Temperature Symbol VIN IO Min. 2.7 10 1.0 10 0 Typ. Max 12 Units V mA F F
TJ
70 125
APPLICATION CIRCUIT
Fixed Output Voltage Regulator
Adjustable Voltage Regulator
2002/02/05 Preliminary Rev. 2
Champion Microelectronic Corporation
Page 2
CM1086
1.5A LOW DROPOUT VOLTAGE REGULATOR
BLOCK DIAGRAM
Fixed Output Voltage Regulator Schematic
Adjustable Voltage Regulator Schematic
2002/02/05 Preliminary Rev. 2
Champion Microelectronic Corporation
Page 3
CM1086
1.5A LOW DROPOUT VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at IOUT = 0mA, and TJ = +25; unless otherwise noted CM1086 Min. 1.238 1.230 2.475 3.267 2.460 3.247 Typ. 1.250 1.250 2.500 3.300 2.500 3.300 0.04 0.08 1.00 1.15 1.5 3 5 CM1086K/S VIN <= 12V, IOUT = 10mA to 3A fO = 120Hz, VRIPPLE = 1VPP, , IOUT = 100mA 60 8 80 10 13 Max. 1.262 1.270 2.525 3.333 2.540 3.353 0.20 0.3 1.15 1.30 Parameter Reference Voltage (Note 1) Output Voltage Output Voltage Line Regulator (Note 1) Load Regulation (Note 1) Dropout Voltage (Note 2) Current Limit Minimum Load Current (Note 3) Quiescent Current Ripple Rejection (Note 4) Device CM1086 CM1086K CM1086S CM1086K CM1086S CM1086 CM1086 Test Conditions (Note 1) 10mA <= IOUT <= 1.5A TA = +25 IOUT = 10mA to 3A 1.5V+ VOUT <= VIN <= 12V IOUT = 10mA to 3A IOUT = 10mA IOUT = 3A (VIN - VOUT ) = 2V Unit V V V V V % % V A mA mA dB
Note 1: Line and load regulations are guaranteed up to maximum power dissipation determined by input/output differential and the output current. However, the maximum power will not be available over the full input/output voltage range. Note 2: The specifications represent the minimum input/output voltage required to maintain 1% regulation. Note 3: The minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used to set the output voltage is selected to meet the minimum load current requirement. Note 4: These parameters, although guaranteed, are not tested in production prior to shipment.
2002/02/05 Preliminary Rev. 2
Champion Microelectronic Corporation
Page 4
CM1086
1.5A LOW DROPOUT VOLTAGE REGULATOR
APPLICATION CIRCUIT
Fixed Output Voltage Regulator
Adjustable Regulator
2002/02/05 Preliminary Rev. 2
Champion Microelectronic Corporation
Page 5
CM1086
1.5A LOW DROPOUT VOLTAGE REGULATOR
PACKAGE DIMENSION
TO-252 (N252)
Y B R C E X L2 L1 K S D G J H
L
TO-263 (N263)
C E V S K G J D H
2002/02/05 Preliminary Rev. 2 Champion Microelectronic Corporation
B
A
A
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CM1086
1.5A LOW DROPOUT VOLTAGE REGULATOR
IMPORTANT NOTICE
Champion Microelectronic Corporation (CMC) reserves the right to make changes to its products or to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. A few applications using integrated circuit products may involve potential risks of death, personal injury, or severe property or environmental damage. CMC integrated circuit products are not designed, intended, authorized, or warranted to be suitable for Use of CMC products in such applications is In order to minimize risks associated with the customer's applications, the use in life-support applications, devices or systems or other critical applications. understood to be fully at the risk of the customer. customer should provide adequate design and operating safeguards.
HsinChu Headquarter
5F, No. 11, Park Avenue II, Science-Based Industrial Park, HsinChu City, Taiwan T E L : +886-3-567 9979 F A X : +886-3-567 9909
Sales & Marketing
11F, No. 306-3, SEC. 1, Ta Tung Road, Hsichih, Taipei Hsien 221, Taiwan T E L : +886-2-8692 1591 F A X : +886-2-8692 1596
2002/02/05 Preliminary Rev. 2
Champion Microelectronic Corporation
Page 7

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