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| E L E C T R O N I C MT1117 1A LDO LINEAR VOLTAGE / REGULATORS DESCRIPTION The MT1117 series are low-drop-out ( LDO ) linear regulators. The devices have been optimized for applications where fast transient response and minimum input voltages are critical. The internal over-current protection and thermal protection ,makes the device extremely easy to use in a wide range of applications. FEATURES * Low dropout performance * Output current of 800mA typical * Wide range input supply voltage * Thermal shutdown protection * Fixed 1.8V, 2.5V, 3.3V output voltages available * SOT-223 packages available APPLICATIONS * Active SCSI terminators * High efficiency linear regulators * Motherboard clock supplies PIN CONFIGURATIONS TO-252 (Top View) SOT-223 (Top View) 1 2 3 1 2 3 1: GND, 2: OUT, 3: IN 1: OUT, 2: GND, 3: IN ABSOLUTE MAXTMUM RETINGS SYMBOL PARAMETER Input supply voltage Thermal resistance junction to case SOT-223 TO-252 Thermal resistance junction to ambient SOT-223 TO-252 MAXIMUM 7 15 10 UNITS VIN JC V O C/W JA 156 90 O C/W O TJ Operating junction temperature range 0 to 125 C O TSTG Storage temperature range - 40 to 150 C O TLEAD Lead temperature (soldering) 10sec 260 C Note 1: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of the specified terminal. http:// www.sirectsemi.com -1- MT1117 ORDERING INFORMATION DEVICE MT1117A MT1117-X.X A PACKAGE VOUT VOLTS X.X_ 1.5 / 1.8 / 2.5 / 2.8 / 3.0 / 3.3 TA (OC) 0~70 A SOT-223 POWER DISSIPATION TABLE: Package A JA ( C /W ) O O Df( mW/ C) O TA 25 C O TA 25 C Power rating(mW) TA=70 OC Power rating(mW) 588 TA= 85 OC Power rating (mW) 478 156 7.35 919 Note : 1.JA: Thermal Resistance-Junction to Ambient, DF : Derating factor, Po: Power consumption. 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. 2.JT: Thermal Resistance-Junction to Ambient, TC: case(Tab) temperature, TJ = TC + (PD x JT) For A package, JT = 15.0 C /W. O For B package, JT = 7.0 C /W. O RECOMMENDED OPERATING CONDITIONS: Symbol VIN IO CIN COUT TJ Input Voltage Load Current (with adequate heatsinking) Input Capacitor (VIN to GND) Output Capacitor with ESR of 10 max., (VOUT to GND) Junction temperature Parameter Recommended Operating Min. Typ. Max. 3 6 0.1 1.0 4.7 125 Units V mA F F O C TYPICAL APPLICATIONS: Fixed Voltage Regulator: VIN MT1117-X.X VOUT CIN 1F IQ COUT 4.7F http:// www.sirectsemi.com -2- MT1117 ELECTRICAL CHARACTERISTICS: O Operating Conditions: 3V VIN 6V, TJ = 0125 C unless otherwise specified. MIN TYP MAX UNITS SYMBOL PARAMETER TEST CONDITION 10mA IOUT 1A TA=25 OC, MT1117-1.5, 3V VIN 5.5V MT1117-1.8, 3V VIN 5.5V MT1117-2.5, 3.5V VIN 5.5V MT1117-2.8, 3.8V VIN 5.5V MT1117-3.0, 4V VIN 5.5V MT1117-3.3, 4.3V VIN 5.5V (VOUT+1V) VIN 5.5V IOUT=10mA 10mA IOUT 1A VIN2V, IOUT=1A (VIN-VOUT)=2V VIN=VOUT+1.25 1.5V (VIN-VOUT) 5.75V f = 120Hz, VO Output Voltage (1) 1.764 2.450 3.234 1.8 2.5 3.3 1.836 2.550 3.366 V V V VSR VLR VD ICL IQ IO RA NOTES: Line Regulation (1) Load Regulation (1) Dropout Voltage (2) Current Limit Quiescent Current Minimum Load Current Ripple Rejection Ratio 0.005 0.5 0.65 1.5 1 0.1 75 1.0 % % V A mA mA dB (1) Low duty cycle pulse testing with which TJ remain unchanged. (2) VOUT, VREF = 1% TYPICAL PERFORMANCE CHARACTERISTICS: VIN= 5VCIN=10FCOUT= 22FTA=25 C unless otherwise specified. O DROPOUT VOLTAGE vs. OUTPUT CURRENT 1.3 1.2 Dropout Voltage (V) 1.1 1 0.9 0.8 0.7 0.6 0.5 10 100 300 500 800 Output Current (mA) http:// www.sirectsemi.com -3- MT1117 APPLICATION NOTE: 1. Maximum Power Dissipation Calculation: PD(max) = [(VIN(max) - VO(nom))] x IO(nom) + VIN(max) x IQ Where: VO(nom) : The nominal output voltage IO(nom) : The nominal output current, and IQ : The quiescent current the regulator consumes at IO(MAX) VIN(max) : The maximum input voltage Then JA = (150 OC - TA) / PD PHYSICAL DIMENSIONS: 3-Pin Surface Mount SOT-223(A) MILLIMETERS D A c MIN A A1 B B1 c D 1.50 0.02 0.60 2.90 0.28 6.30 3.30 TYP 1.65 0.05 0.70 0.30 6.50 3.50 2.3 BSC 4.6 BSC MAX 1.80 0.08 0.80 3.15 0.32 6.70 3.70 B1 H E K L E A1 e e1 e e1 H L K 6.70 0.91 1.50 0 7.00 1.00 1.75 5 3 7.30 1.10 2.00 10 B Sirectifier Global Corp., Delaware, U.S.A. U.S.A.: sgc@sirectsemi.com France: ss@sirectsemi.com Taiwan: se@sirectsemi.com Hong Kong: hk@sirectsemi.com China: st@sirectsemi.com ...Thailand: th@sirectsemi.com Philippines: aiac@sirectsemi.com Belize: belize@sirectsemi.com http:// www.sirectsemi.com -4- |
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