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CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The CM1117F series of adjustable and fixed voltage regulators are designed to provide 1A for applications requiring high efficiency. All internal circuitry is designed to operated down to 1V input to output differential and the dropout voltage is fully specified as a function of load current. The CM1117F offers current limiting and thermal protection. The on chip trimming adjusts the reference voltage accuracy to2%.
FEATURES
Three Terminal Adjustable or Fixed Voltages: 1.8V, 2.5V, 3.3V, and adjustable. Output Current of 1A Low dropout voltage: 1.1V Typ. Line Regulation: 0.3% Max Load Regulation: 2% Max Fast Transient Response Thermal Protection SOT-223 package available Rugged 3KV ESD withstand capability.
APPLICATIONS
High Efficiency Linear Regulators Post Regulators for Switching Supplies Battery Chargers Active SCSI Terminators Post Regulator for Switching DC/DC Converter Battery Powered Instrumentation
PIN CONFIGURATION
SOT-223 Top View
GND/ADJ
VOUT 2
1
ORDERING INFORMATION
Package Type SOT-223 CM1117FDCM223 CM1117FKCM223 CM1117FSCM223 CM1117FCM223 CM1117FGDCM223* CM1117FGKCM223* CM1117FGSCM223* CM1117FGCM223* Operating Temperature Range (TA) 0 ~ +85 0 ~ +85 0 ~ +85 0 ~ +85 0 ~ +85 0 ~ +85 0 ~ +85 0 ~ +85 Output Voltage 1.8V 2.5V 3.3V ADJ. 1.8V 2.5V 3.3V ADJ.
*Note: G : Suffix for Pb Free Product 2007/11/06 Rev1.3 Champion Microelectronic Corporation Page 1
VIN 3
CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
ABSOLUTE MAXIMUM RATINGS
Input Voltage ........................................................................... +12V Operating Junction Temperature Range, TJ ..................... 0 to +125 Storage Temperature .................................................. -40 to +150 Lead Temperature (10 sec.) ......................................................... 260
THERMAL INFORMATION
Parameter Thermal Resistance (ja) Internal Power Dissipation (PD) (T = 100, No Heatsink) Maximum Junction Temperature Maximum Lead Temperature (10 Sec) SOT-223 SOT-223 Maximum 136 900 125 260 Unit /W mW
BLOCK DIAGRAM
2007/11/06 Rev1.3
Champion Microelectronic Corporation
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CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at IOUT = 10mA, and TJ = +25; unless otherwise noted CM1117F Min. 1.225 1.764 2.450 3.234 Typ. 1.250 1.800 2.500 3.300 0.05 1 0.4 8 1 1.1 1.8 4 10 35 0.01 48 0.1 120 13 1.25 Max. 1.275 1.836 2.550 3.366 0.30 6.0 2 36
Parameter Reference Voltage Output Voltage
Device CM1117F CM1117FD CM1117FK CM1117FS Adj. Output Fixed Output Adj. Output Fixed Output Fixed Output Fixed Output
Test Conditions IOUT = 10mA, VIN= 5V 10mA <= IOUT <= 1A, 3.2V<= VIN <= 7V 10mA <= IOUT <= 1A, 4.25V<= VIN <= 7V 10mA <= IOUT <= 1A, 4.75V<= VIN <= 7V IOUT = 10mA, 1.5V<= VIN <= 7V IOUT = 10mA, VOUT + 1.5V<= VIN <= 7V 10mA <= IOUT <= 1A, VIN - VOUT = 3V 10mA <= IOUT <= 1A, VIN = VOUT + 1.5V IOUT = 10mA IOUT = 1A (VIN - VOUT ) = 3V VIN <= 7V
Unit V V V V % mV % mV V A mA mA dB %W A
Line Regulator Load Regulation Dropout Voltage (VIN - VOUT ) Current Limit Minimum Load Current (Note 1) Quiescent Current Ripple Rejection (Note 2) Thermal Regulation (Note 2) Adjust Pin Current
Fixed Output
VIN <= 7V fO = 120Hz, 1VRMS, , IOUT = 1A, (VIN - VOUT )= 3V TA = 25, 30ms pulse IOUT = 10mA, VIN - VOUT = 2V
Note 1: For the adjustable device, 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 2: These parameters, although guaranteed, are not tested in production.
2007/11/06 Rev1.3
Champion Microelectronic Corporation
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CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
APPLICATION CIRCUIT
Adjustable Regulator VOUT = 1.25V (1+R2/R1)
5V Regulator with Shutdown
Fixed Voltage Regulator
2007/11/06 Rev1.3
Champion Microelectronic Corporation
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CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
Application Hints
Like any linear voltage regulator, CM1117F requires external capacitors to ensure stability. The external capacitors must be carefully selected to ensure performance.
Thermal Considerations
It is important that the thermal limit of the package is not exceeded. The CM1117F has built-in thermal protection. When the thermal limit is exceeded, the IC will enter protection, and VOUT will be pulled to ground. The power dissipation for a given application can be calculated as following: The power dissipation (PD) is PD = IOUT * [VIN - VOUT] The thermal limit of the package is then limited to It must be PD(MAX) = [TJ - TA]/JA where TJ is the junction temperature, TA is the ambient temperature, and JA is around 136C/W for CM1117F. CM1117F is designed to enter thermal protection at 125C. For example, if TA is 25C then the maximum PD is limited to about 0.9W. In other words, if IOUT(MAX) = 0.5A, then [VIN - VOUT] cannot exceed 1.8V.
Input Capacitor
An input capacitor of at least 10F is required. Ceramic or Tantalum can be used. The value can be increase without upper limit.
Output Capacitor
An output capacitor is required for stability. placed no more than 1 cm away from the VOUT pin, and connected directly between VOUT and GND pins. The minimum value is 22F but may be increase without limit.
2007/11/06 Rev1.3
Champion Microelectronic Corporation
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CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
Typical Performance Characteristics
Reference Voltage vs Junction Temperature 1250 Reference Voltage (mV) 1245 1240 1235 1230 1225 1220 -25 0 25 50 75 100 125 150 Junction Temperature (C)
Line Transients
Output Voltage vs Junction Temperature 3.70 3.65 3.60 Output Voltage 3.55 3.50 3.45 3.40 3.35 3.30 3.25 3.20 -25 0 25 50 75 100 125 150 Junction Temperature (C)
Load Transients
Dropout Voltage vs Output Current 1.14 1.12 Dropout Voltage (V) 1.1 1.08 1.06 1.04 1.02 1 0 200 400 600 800 1000 Output Current (mA)
2007/11/06 Rev1.3
Champion Microelectronic Corporation
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CM1117F
1A LOW DROPOUT VOLTAGE REGULATOR
PACKAGE DIMENSION
SOT-223 (M223)
D B1 A
E
L1
H
e e1
8
A B B1 D E e e1 H L L1
B
B
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Champion Microelectronic Corporation
L
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CM1117F
1A 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 in life-support applications, devices or systems or other critical applications. Use of CMC products in such applications is understood to be fully at the risk of the customer. In order to minimize risks associated with the customer's applications, the 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
7F-6, No.32, Sec. 1, Chenggong Rd., Nangang District, Taipei City 115, Taiwan T E L : +886-2-2788 0558 F A X : +886-2-2788 2958
2007/11/06 Rev1.3
Champion Microelectronic Corporation
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