CM1117F 1A LOW DROPOUT VOLTAGE REGULATOR GENERAL DESCRIPTION FEATURES The CM1117F series of adjustable and fixed voltage Three Terminal Adjustable or Fixed Voltages: 1.8V, 2.5V, 3.3V, and adjustable. regulators are designed to provide 1A for applications requiring high efficiency. All internal circuitry is designed to Output Current of 1A operated down to 1V input to output differential and the Low dropout voltage: 1.1V Typ. dropout voltage is fully specified as a function of load current. Line Regulation: 0.3% Max Load Regulation: 2% Max The CM1117F offers current limiting and thermal protection. Fast Transient Response The on chip trimming adjusts the reference voltage accuracy Thermal Protection to2%. 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 GND/ADJ VOUT VIN SOT-223 Top View 1 2 3 ORDERING INFORMATION Package Type Operating Temperature Output Voltage SOT-223 Range (TA) CM1117FDCM223 0℃ ~ +70℃ 1.8V CM1117FKCM223 0℃ ~ +70℃ 2.5V CM1117FSCM223 0℃ ~ +70℃ 3.3V CM1117FCM223 0℃ ~ +70℃ ADJ. CM1117FGDCM223* 0℃ ~ +70℃ 1.8V CM1117FGKCM223* 0℃ ~ +70℃ 2.5V CM1117FGSCM223* 0℃ ~ +70℃ 3.3V CM1117FGCM223* 0℃ ~ +70℃ ADJ. *Note: G : Suffix for Pb Free Product 2006/03/07 Rev1.0 Champion Microelectronic Corporation Page 1 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 Maximum Unit Thermal Resistance (Θja) SOT-223 60 ℃/W Internal Power Dissipation (PD) (ΔT = 100℃, No Heatsink) SOT-223 900 mW 125 260 ℃ ℃ Maximum Junction Temperature Maximum Lead Temperature (10 Sec) BLOCK DIAGRAM 2006/03/07 Rev1.0 Champion Microelectronic Corporation Page 2 CM1117F 1A LOW DROPOUT VOLTAGE REGULATOR ELECTRICAL CHARACTERISTICS Electrical Characteristics at IOUT = 10mA, and TJ = +25℃; unless otherwise noted Parameter Device Test Conditions Reference Voltage CM1117F Output Voltage Line Regulator Load Regulation Dropout Voltage (VIN – VOUT ) Current Limit Max. IOUT = 10mA, VIN= 5V 1.225 1.250 1.275 V CM1117FD 10mA <= IOUT <= 1A, 3.2V<= VIN <= 7V 1.764 1.800 1.836 V CM1117FK 10mA <= IOUT <= 1A, 4.25V<= VIN <= 7V 2.450 2.500 2.550 V CM1117FS 10mA <= IOUT <= 1A, 4.75V<= VIN <= 7V 3.234 3.300 3.366 V Adj. Output IOUT = 10mA, 1.5V<= VIN <= 7V 0.05 0.30 % Fixed Output IOUT = 10mA, VOUT + 1.5V<= VIN <= 7V 1 6.0 mV Adj. Output 10mA <= IOUT <= 1A, VIN – VOUT = 3V 0.4 2 % Fixed Output 10mA <= IOUT <= 1A, VIN = VOUT + 1.5V 8 36 mV IOUT = 10mA 1 IOUT = 1A 1.1 (VIN – VOUT ) = 3V 1.8 Fixed Output Fixed Output Minimum Load Ripple Rejection (Note 2) Thermal Regulation (Note 2) Adjust Pin Current Unit Typ. VIN <= 7V Current (Note 1) Quiescent Current CM1117F Min. Fixed Output 1.25 V A 4 mA VIN <= 7V 10 13 mA fO = 120Hz, 1VRMS, , IOUT = 1A, (VIN – VOUT )= 3V 35 TA = 25℃, 30ms pulse 0.01 0.1 %W IOUT = 10mA, VIN – VOUT = 2V 48 120 μA dB 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. 2006/03/07 Rev1.0 Champion Microelectronic Corporation Page 3 CM1117F 1A LOW DROPOUT VOLTAGE REGULATOR APPLICATION CIRCUIT Adjustable Regulator VOUT = 1.25V (1+R2/R1) 5V Regulator with Shutdown Fixed Voltage Regulator 2006/03/07 Rev1.0 Champion Microelectronic Corporation Page 4 CM1117F 1A LOW DROPOUT VOLTAGE REGULATOR Application Hints Thermal Considerations Like any linear voltage regulator, CM1117F requires It is important that the thermal limit of the package is external capacitors to ensure stability. The external not exceeded. capacitors must be carefully selected to ensure protection. When the thermal limit is exceeded, the IC performance. will enter protection, and VOUT will be pulled to ground. The CM1117F has built-in thermal The power dissipation for a given application can be calculated as following: Input Capacitor An input capacitor of at least 10μF is required. Ceramic or Tantalum can be used. The value can be The power dissipation (PD) is increase without upper limit. PD = IOUT * [VIN – VOUT] The thermal limit of the package is then limited to Output Capacitor An output capacitor is required for stability. It must be placed no more than 1 cm away from the VOUT pin, and connected directly between VOUT and GND pins. The minimum value is 22μF but may be increase without limit. PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction temperature, TA is the ambient temperature, and ΘJA is around 60°C/W for CM1117F. CM1117F is designed to enter thermal protection at 175°C. For example, if TA is 25°C then the maximum PD is limited to about 2.5W. In other words, if IOUT(MAX) = 1A, then [VIN – VOUT] cannot exceed 2.5V. 2006/03/07 Rev1.0 Champion Microelectronic Corporation Page 5 CM1117F 1A LOW DROPOUT VOLTAGE REGULATOR Typical Performance Characteristics Reference Voltage vs Junction Temperature Line Transients Reference Voltage (mV) 1250 1245 1240 1235 1230 1225 1220 -25 0 25 50 75 100 125 150 Junction Temperature (C) Load Transients Output Voltage vs Junction Temperature 3.70 3.65 Output Voltage 3.60 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) Dropout Voltage vs Output Current 1.14 Dropout Voltage (V) 1.12 1.1 1.08 1.06 1.04 1.02 1 0 200 400 600 800 1000 Output Current (mA) 2006/03/07 Rev1.0 Champion Microelectronic Corporation Page 6 CM1117F 1A LOW DROPOUT VOLTAGE REGULATOR PACKAGE DIMENSION SOT-223 (M223) D A L L1 H E B1 e e1 A 8° B B1 D E e e1 H L L1 B 2006/03/07 Rev1.0 B θ Champion Microelectronic Corporation Page 7 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 Sales & Marketing 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 11F, No. 306-3, SEC. 1, Ta Tung Road, Hsichih, Taipei Hsien 221, Taiwan 2006/03/07 Rev1.0 T E L : +886-2-8692 1591 F A X : +886-2-8692 1596 Champion Microelectronic Corporation Page 8