EZ1580/EZ1581 EZ1582/EZ1583 Dual Input Low Dropout Regulator POWER MANAGEMENT Description Features The EZ158X family of high performance positive voltage regulators are designed for use in applications requiring very low dropout voltage at up to 7, 5, 3 and 1.5 amps. Capable of supplying up to 2.8V on boards where both 5V and 3.3V supplies are available, the superior dropout characteristics of the EZ158X result in reduced heat dissipation compared to regular LDOs. This allows for heatsink size reduction or elimination. Additionally, the EZ158X provides excellent regulation over variations in line, load and temperature. Remote sense operation allows compensating for trace, connector and other resistive losses. 540mV dropout @ 7A in dual supply mode (EZ1580) Remote sense operation Fast transient response 0.5% initial accuracy Line regulation typically 0.08% Load regulation typically 0.08% 5 Pin TO-220 and TO-263 packages Applications Outstanding features include very low dropout performance at rated current, fast transient response, remote sense, internal current limiting, thermal shutdown and safe operating area protection of the output device. The EZ158X is a five terminal adjustable or fixed 2.5V voltage regulator available in the popular 5 pin TO-220 and TO-263 plastic packages. Microprocessor supplies Split plane microprocessor supplies Advanced graphics cards Sound cards Low voltage logic supplies Switching power supply post regulation Typical Application Circuits Adjustable Output Parts(3) U1 3.3V POWER IN 5 5V CONTROL IN 4 1 SNS EZ158XCX VREF PWR OUT 3 2.5V OUT CTL ADJ C1 33uF C2 10uF R1 124 C3 68uF 2 R2 VOUT = VREF 1 + + I ADJ • R 2 R1 R2 124 GROUND GROUND Fixed Output Parts U1 1 EZ158XCX-2.5 SNS 3.3V POWER IN 5 5V CONTROL IN 4 PWR OUT 3 2.5V OUT CTL GND C1 33uF C2 10uF C3 68uF 2 GROUND GROUND Notes: (1) Capacitor values are for reference only. Good quality, low ESR tantalum or aluminum electrolytic capacitors should be used. Increasing the value of the output capacitor will improve the overall transient response. (2) If the same voltage is input to both PWR and CTL, then the dropout voltage will become 1.3V maximum. (3) A small (~0.033µF) capacitor can be used to bypass the ADJ pin to improve transient response, if needed. June 23, 2010 1 www.semtech.com EZ1580/EZ1581 EZ1582/EZ1583 POWER MANAGEMENT Absolute Maximum Ratings Parameter Symbol Maximum Units Power Input Voltage VPWR 7 V Control Input Voltage VCTL 13.2 V Power Dissipation PD Internally Limited W Thermal Resistance Junction to Ambient EZ158X TO-220 EZ158X TO-263 θJ A 50 60 °C/W Thermal Resistance Junction to Case EZ1580/1 (TO-220 & TO-263) EZ1582/3 (TO-220 & TO-263) θJ C 2 3 °C/W Operating Junction Temperature Range TJ 0 to +125 °C Storage Temperature Range TSTG -65 to +150 °C Lead Temperature (Soldering) 10 Sec. TLEAD 300 °C ESD Rating (Human Body Model) ESD 2 kV Electrical Characteristics(7) Unless specified: VOUT = VSNS, VADJ = 0V, CCTL = CPWR = COUT = 10µF. Values in bold apply over full operating temperature range. Parameter Reference Voltage(1) Symbol Test Conditions Min Typ Max Units VREF VPWR = 2.05V, VCTL = 4.5V, IOUT = 10mA 1.237 1.250 1.263 V VPWR = 2.05V, VCTL = 4.5V, 10mA < IOUT < IRATED 1.231 VPWR = 3.3V, VCTL = 4.5V, IOUT = 10mA -1 VPWR = 3.3V, VCTL = 4.5V, 10mA < IOUT < IRATED -1.5 (Adj. Voltage Versions) Output Voltage(1) VOUT (2.5V Version) 1.269 VOUT +1 % +1.5 Line Regulation(1) REG(LINE) VPWR = (VOUT + 0.8V) to 5.5V, VCTL = 4.5V to 12V, IOUT = 10mA 1.0 3.0 mV Load Regulation(1) REG(LOAD) VPWR = VOUT + 0.8V, VCTL = 4.5V, IOUT = 10mA to IRATED 1.0 5.0 mV VPWR - VOUT VCTL = 4.75V, I O = IRATED 0.40 0.50 V 0.50 0.60 0.54 0.62 0.70 0.80 VPWR Dropout Voltage (1)(2) EZ1581, EZ1582, EZ1583 VPWR Dropout Voltage EZ1580 2005 Semtech Corp. (1)(2) VCTL = 4.75V, I O = IRATED 2 V www.semtech.com EZ1580/EZ1581 EZ1582/EZ1583 POWER MANAGEMENT Electrical Characteristics (Cont.)(7) Unless specified: VOUT = VSNS, VADJ = 0V, CCTL = CPWR = COUT = 10µF. Values in bold apply over full operating temperature range. Parameter Symbol Test Conditions ICTL VPWR = VOUT + 0.8V, VCTL = 4.5V, IOUT = IRATED Min Typ Max Units 6 120 mA EZ1582 30 120 EZ1581 33 120 EZ1580 60 120 Control Pin Current (3) EZ1583 Adjust Pin Current Minimum Load Current(4) IADJ VPWR = 2.05V, VCTL = 4.5V, IOUT = 10mA 50 120 µA IOUT(MIN) VPWR = VOUT + 0.8V, VCTL = 5V 5 10 mA ICL VPWR = VOUT + 0.8V, VCTL = 4.5V, 1.6 ∆VOUT = 100mV 3.1 Current Limit EZ1583 EZ1582 EZ1581 5.1 EZ1580 7.1 Ripple Rejection Ratio(5) Thermal Regulation (6) RA VPWR = VCTL = 5V, I O = IRATED REG (THERMAL) 60 A 80 0.002 dB 0.02 %/W NOTES: (1) Low duty cycle pulse testing with Kelvin connections required. (2) Minimum input to output voltage differential required to maintain 1% regulation. (3) Current used to drive the output section. (4) Required to maintain regulation. Resistor divider R1, R2 is usually utilized for minimum load current. (5) VRIPPLE = 1VPK-PK, 120Hz. (6) 30ms. (7) IRATED = 1.5A for EZ1583, 3A for EZ1582, 5A for EZ1581 and 7A for EZ1580. 2005 Semtech Corp. 3 www.semtech.com EZ1580/EZ1581 EZ1582/EZ1583 POWER MANAGEMENT Pin Configurations Ordering Information Device(1) P ackag e IOUT (A) Pin Function EZ1580CT-X.X 1 SNS EZ1581CT-X.X 2 AD J EZ1582CT-X.X 3 3 OUT EZ1583CT-X.X 2.5 4 CTL EZ1580CM-X.X.TR 7 5 PWR EZ1581CM-X.X.TR 5 Tab is OUT EZ1582CM-X.X.TR EZ1583CM-X.X.TR 7 TO-220, 5-pin(2) TO-263, 5-pin (3) 5 3 2.5 EZ1583CMTRT(4) Block Diagram EZ158xCM-X.XTRT(4) - Notes: (1) Where -X.X denotes voltage options. Available voltage is: 2.5V. Leave blank for adjustable version (1.3 to 5.7V). (2) Only available in tube packaging. A tube contains 50 devices. (3) Only available in tape and reel packaging. A reel contains 800 devices. (4) This product is fully WEEE and RoHS compliant. Where x = 0; 1; 2 or 3. X.X denotes voltage options. Pin Descriptions Pin # Symbol Pin Name Pin Function 1 SNS SENSE This pin is the positive side of the reference voltage for this device. With this pin it is possible to Kelvin sense the output voltage at the load. 2 AD J ADJUST This pin is the negative side of the reference voltage for this device. Transient response can be improved by adding a small bypass capacitor from the adjust pin to ground. 3 OUT OUTPUT This is the power output of the device. This pin is electrically connected to the tab. 4 CTL CONTROL This pin is the supply pin for the control circuitry for the device. The current flow into this pin will be approximately 1% of the output current. For the device to regulate, the voltage on this pin must be between 1.0V and 1.3V greater than the output voltage. 5 PWR POWER This is the collector input to the power device of the EZ1583. The ouput load current is supplied through this pin. For the device to regulate, the voltage on this pin must be between 0.1V and 0.8V greater than the output voltage, depending upon load current. 2005 Semtech Corp. 4 www.semtech.com EZ1580/EZ1581 EZ1582/EZ1583 POWER MANAGEMENT Applications Information The EZ158X is a low dropout regulator designed to power low voltage microcontrollers, graphics ICs, sound cards etc. fan costs. For lower current applications, the heatsink might be eliminated altogether. For a load of 7A at 2.5V, the regulator would dissipate 17.5W when converting from 5V, but only 5.6W from a 3.3V input. The dropout voltage is minimized by utilizing a separate input voltage, VCTL, which should exceed VOUT by at least 1.3V. The 2.5V (for example) power for the load can be derived from a 3.3V system supply. Since the efficiency of a linear regulator is the ratio of the output to the input voltage, heat dissipation is reduced by using a 3.3V input (versus a 5V one), thereby lowering heatsink and cooling Remote Kelvin sensing of the output voltage can be achieved by connecting the sense pin to the output at the load. Remote sensing will reduce errors associated with resistive trace losses between regulator and processor. Outline Drawing - TO-220-5 ØP B A aaa DIM A A1 A2 b c D D1 D2 E E1 E2 e H1 L N ØP Q aaa bbb ccc B A SEATING PLANE E E2 A E/2 A1 Q H1 D2 D D1 C L DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX .190 3.56 4.82 .055 0.51 1.40 .115 2.03 2.92 .031 .041 0.63 0.80 1.04 .024 0.36 0.61 .650 14.22 16.51 .355 8.38 9.02 .507 12.19 12.88 .420 9.65 10.66 .350 6.86 8.90 .030 0.76 .067 BSC 1.70 BSC .230 .270 5.84 6.86 .580 12.70 14.73 .500 5 5 .139 .156 3.53 3.96 .100 .120 2.54 3.05 .014 0.36 .015 0.38 .010 0.25 .140 .020 .080 .025 .014 .560 .330 .480 .380 .270 - c e bbb E1 A2 ccc 5X b B A B A NOTES: 1. CONTROLLING DIMENSIONS ARE IN INCHES. 2. DIMENSIONS "D" AND "E" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. Outline Drawing - TO-263-5 A E E/2 DIM 0 A A1 b c c1 D D1 E E1 H e L L1 N 0 01 aaa L1 D H 1 2 3 4 5 e bXN aaa B A DIMENSIONS INCHES MILLIMETERS MIN NOM MAX MIN NOM MAX 4.83 4.06 0.25 0.00 0.51 0.99 0.74 0.38 1.14 1.65 8.28 9.65 6.86 9.65 10.67 6.22 14.61 15.88 1.70 BSC 2.79 1.78 1.68 5 15 0 8 0.25 .190 .010 .039 .029 .065 .380 .420 .625 .067 BSC .070 .110 .066 5 15 0 8 .010 .160 .000 .020 .015 .045 .326 .270 .380 .245 .575 A SEATING PLANE A1 B c1 SIDE VIEW SEE DETAIL PLATED COPPER HEAT SPREADER A D1 (L1) c E1 L DETAIL NOTES: 1. A 01 CONTROLLING DIMENSIONS ARE IN INCHES (ANGLES IN DEGREES). 2. DIMENSIONS "D" AND "E" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 2005 Semtech Corp. 5 www.semtech.com EZ1580/EZ1581 EZ1582/EZ1583 POWER MANAGEMENT Minimum Land Pattern - TO-263-5 H DIM K Z DIMENSIONS INCHES MILLIMETERS G H K P X Y Z .125 .420 .360 .067 .042 .140 .625 3.18 10.67 9.14 1.70 1.07 3.56 15.88 G Y P X NOTES: 1. CONTROLLING DIMENSIONS ARE IN INCHES (ANGLES IN DEGREES). 2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. Contact Information Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 2005 Semtech Corp. 6 www.semtech.com