Today's Resulcs .. Tomorrow's Vision IMI DUAL INPUT SE TECH LOW DROPOUT REGULATOR EZ21580/EZ1581 E21582/EZ1583 February 26, 1999 DESCRIPTION The EZ158X family of high performance positive voltage regulators are designed for use in applications requiring very low dropout voltage at 7, 5, 3 and 1.5 amps. When supplying 2.5V on motherboards 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, thus allowing heat sink size reduction. 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. 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 EZ158xX is a five terminal adjustable voltage regulator available in the popular 5 pin TO-220 and TO-263 plastic packages. FEATURES @ 540mV dropout @ 7A in dual supply mode (EZ1580) Remote sense operation Fast transient response 0.5% initial accuracy 5 Pin TO-220 and TO-263 packages APPLICATIONS Microprocessor supplies Split plane microprocessor supplies Pentium Processor P54C and P55C PowerPC 603/604EV AMD5,86, AMD K6 BLOCK DIAGRAM TEL:805-498-2111 FAX:805-498-3804 WEB:hittp:/Awww.semtech.com ORDERING INFORMATION DEVICE PACKAGE} I, (A) | Vour (V) EZ1580CT-X.X | TO-220, 7 See Note (1) EZ1581CT-X.X | 5-pin 5 EZ1582CT-X.X 3 EZ1583CT-X.X 1.5 EZ1580CM-X.X | TO-263, 7 See Note (1) EZ1581CM-X.X | 5-pin 5 EZ1582CM-X.X 3 EZ1583CM-X.X 1.5 Notes: (1) Where -X.X denotes voltage options. Available voltages are: 1.5V and 2.5V. Leave blank for ad- justable version (1.3 to 5.7V). (2) Add suffix TR for tape and reel (TO-263). ABSOLUTE MAXIMUM RATINGS POWER (5) (4) ed CURRENT LIMITING AMPLIFIER OUTPUT (3) SENSE THERMAL OVERLOAD pO a) aowust/ GROUND (2) VOLTAGE REGULATION AMPLIFIER Parameter Symbol | Maximum | Units Input Voltage Veower Vp 7 V VoontROL Ve 1 3.2 Power Pp Internally WwW Dissipation Limited Thermal Resistance Junction to Case EZ1580/1 TO-220 Bic 2 C/N EZ1580/1 TO-263 2 EZ1582/3 TO-220 3 EZ1582/3 TO-263 3 Thermal Resistance Junction to Ambient EZ158X TO-220 Oya 50 C/N EZ158X TO-263 60 Operating Junction T, 0 to 125 C Temperature Range Storage Temperature Range Tst -65 to 125 C Lead Temperature Theap 260 C (Soldering) 10 Sec. Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM. AMD5,86 and K6 are trademarks of Advanced Micro Devices. 1 1999 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320EMATE DUAL INPUT EZ1580/EZ1581 Ss Today's ATEC Hi LOW DROPOUT REGULATOR EZ1582/EZ1583 February 26, 1999 PIN CONFIGURATION TO-220-SL C) TO263-5SL PIN | FUNCTION 1 N TPUT 4.5 Hh POWER TAB IS OUTPUT Cr |- ae a Cr | PIN DESCRIPTION Pin} Pin Name Pin Function 1 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 | ADJUST / |This pin is the negative side of the reference voltage for the device. Transient response can be improved by adding a small bypass capacitor from the adjust pin to ground. GROUND | This pin is the bottom end of the internal resistor feedback chain for fixed output voltage parts, and should be connected to ground. OUTPUT |This is the power output of the device, and is electrically connected to the TAB. 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 at this pin must be between 1.0V and 1.3V greater than the output voltage (see dropout specifications). 5 POWER |This is the collector input to the power device of the EZ158X. The output load current is sup- plied through this pin. For the device to regulate, the voltage on this pin must be between 0.1V and 0.7V greater than the output voltage, depending upon load current (see dropout specifica- tions). 2 1999 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320SERATECH DUAL INPUT EZ21580/EZ1581 Today's Recules Tomorrows Vision LOW DROPOUT REGULATOR EZ1582/EZ1583 February 26, 1999 ELECTRICAL CHARACTERISTICS Test Conditions Test Limits Parameter Symbol Vente Voewr Amps T. oO Min Typ Max Units Volts Volts Reference Voltage VReE 2.75 2.00 0.01 25C 1.243 1.250 1.257 EZ1583 0.01 -1.5 EZ1582 2.7-12 2.05 - 5.5 0.01 - 3.0 O.T. 1.237 1.250 1.263 Vv EZ1581 0.01 - 5.0 EZ1580 0.01 - 7.0 Line Regulation REGuiney 2.5-12 1.75-5.5 0.01 O.T. 1.0 3.0 mV Load Regulation EZ1583 0.01 -1.5 EZ1582 REG oan) 2.75 2.1 0.01 - 3.0 O.T. 1.0 5.0 mV EZ1581 0.01 - 5.0 EZ1580 0.01 - 7.0 Minimum Load Current lo 5 3.3 O.T. 5.0 10 mA Control Pin Current EZ1583 15 6.0 EZ1582 lo 2.75 2.05 3.0 O.T. 30 120 mA EZ1581 5.0 33 EZ1580 7.0 60 Adjust Pin Current lapy 2.75 2.05 0.01 O.T. 50 120 HA Current Limit EZ1583 1.6 EZ1582 lot 2.75 2.05 O.T. 3.1 A EZ1581 5.1 EZ1580 7.4 Ripple Rejection @ EZ1583 0.75 EZ1582 Ra 3.75 3.75 15 25C 60 80 dB EZ1581 2.5 EZ1580 3.5 Thermal Regulation REG cuerwaty 0.002 | 0.02 | %W Dropout Voltage a Minimum Vent. EZ1583 1.5 1.00 15 EZ1582 Ve-Vo 2.05 3.0 O.T. 1.05 1.18 V EZ1581 5.0 1.25 EZ1580 7.0 1.30 Dropout Voltage a Minimum Vpower EZ1583 1.5 25C 0.40 0.50 O.T. 0.50 0.60 EZ1582 Ve-Vo 2.75 3.0 25C 0.40 0.50 V O.T. 0.50 0.60 EZ1581 5.0 25C 0.40 0.50 O.T. 0.50 0.60 EZ1580 7.0 25C 0.54 0.62 O.T. 0.70 0.80 NOTES: _ (1) Unless otherwise specified, Vou; = Vsense, Vans = OV. (2) Required to maintain regulation. Voltage set resistors R1, R2 are usually utilized for minimum load current. (3) Current used to drive the output section; minimum value equals the standby current of the device. (4) Vo = Ve = 3.75V AVY; Vaiss = Tern: (5) 30ms. (6) Over Temp (O.T.) = over specified operating junction temperature range. 3 (7) Minimum input/output voltage required to maintain 1% regulation. 1999 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320SERATECH = OUAL INPUT Today's Resulcs .. Tomorrow's Vision LOW DROPOUT REGULATOR EZ21580/EZ1581 E21582/EZ1583 February 26, 1999 TYPICAL APPLICATIONS") Adjustable Output Parts" EZ158XCX 47uF SENSE VREF 3.3V POWER IN 5 DowER 3 OUTPUT 0 2.5V OUT 5V CONTROL IN 4 contROL ADJ Ri LL LL 124 _L >T~ Cl -T~ C2 JT C3 33uF 10uF 2 68uF z R2 124 GROUND I GROUND Vout = Veer [ + ml lany @R2 Fixed Output Parts ul EZ158XCX-2.5 1 SENSE 3.3V POWER IN 5 DowER 3 ouTPUT 2.5V OUT 5V CONTROL IN 4H controL GND -y~ Ci c2 7T~ C3 33uF 10uF 2 68uF GROUND O# I : GROUND ul EZ158XCX-1.5 SENSE 2.5V POWER IN O 5 DowER 3 ouTPUT 0 1.5V OUT 3.3V CONTROL IN @ 4#* control GND -T cl 7T~ 03 c2 10uF 2 100uF GROUND GROUND rT 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 POWER and CONTROL, then the dropout voltage will become 1.3V max- imum. (3) A small (~0.033yF) capacitor can be used to bypass the ADJUST pin to improve transient response, if needed. 4 1999 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320Today's Resulcs .. Tomorrow's Vision IMI DUAL INPUT SE TECH LOW DROPOUT REGULATOR EZ21580/EZ1581 E21582/EZ1583 February 26, 1999 APPLICATION INFORMATION The EZ158X is a low dropout regulator designed to power the next generation of low voltage, split voltage plane processors, such as the Pentium Processor P55C, the IBM PowerPC 603EV and 604EV and the AMD5,86 and K6 Processors. The dropout voltage is minimized by utilizing a separate input voltage, Voontro,, which should exceed Vour by at least 1.3V. The 2.5V power for the load (microprocessor core) 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 3.3 input, thereby lowering heatsink and cooling fan costs. 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. 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. DEVICE OUTLINE - TO-263, 5 PIN DEVICE OUTLINE - TO-220, 5 PIN J we! Ble AP pS i D Qtr f NN, x 7 | ty Ls O @X |]. . JEDEC TO-220 MINIMUM LAND PATTERN - TO-263, 5 PIN ep yo Th, a 4 i to 71 i Fe m O JEDEC TO-263 0.420 Q0.350 0.615 ob Hes | _ baa 5x 0.067, 4x NOTE: ALL DIMENSIONS ARE IN INCHES 5 1999 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320