IMP37

IMP37 IMP | Alldatasheet

Document overview

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Technical content

© 1999 IMP , Inc. 408-432-9100/www.impweb.com 1 Key Features

Applications

u High-efficiency linear power supplies u Post regulator for switching supplies u 5V to 3.3V linear regulators u USB hubs u Battery chargers u Routers, ISDN/DSL modems u Low Dropout Voltage – 0.8V maximum at 100mA – 0.95V maximum at 800mA – 20% lower dropout voltage than “1117” LDO regulators u Guaranteed Low Dropout Voltage at Multiple Current Levels u 1% Trimmed 2.5V , 3.0V and 3.3V Outputs u Reduced Quiescent Current: 75µA Maximum u Short Circuit and Thermal Protection u Space Saving SOT-223 Surface Mount Package u “1117” Pin Compatible Block Diagram 37_01.epsGND Ref IMP37 Thermal Protection Error Amp Current Limit 2Input 3 Out (Tab) R CS IMP3IMP3 77 POWER MANAGEMENT LoLow Drw Dropout Popout Positivositive e VVoltoltagage Re Regulategulatororss – 800mA– 800mA The IMP37 series of Low Dropout (LDO) three-terminal voltage regula- tors feature guaranteed low dropout voltages at currents up to 0.8A. The IMP37 regulator family dropout voltage is guaranteed to be 0.95V or lower at 0.8A. At 100mA, the maximum dropout voltage is 0.8V . Compared with “1117” type LDOs, the IMP37 has a 20% lower dropout voltage. Three fixed output voltages are offered: 2.5V , 3.0V and 3.3V . Output volt- ages are factory trimmed to within 1% of the nominal value. In addition to low dropout voltages, the IMP37 family features greatly reduced quiescent operating current. The 75 mA maximum specification represents an over 100 times improvement over competitive devices. Devices are short circuit protected, and a thermal protection circuit shuts the regulator off should the junction temperature exceed 165°C. The IMP37 is available in low-profile plastic SOT-223 and TO-263 packages and are pin compatible with fixed “1117” devices.

2 408-432-9100/www.impweb.com © 1999 IMP , Inc. Pin Configuration IMP3IMP3 77 Pin Descriptions IMP37 GND INPUT TAB IS VOUT OUT2 37_04.eps Package Marking Code

Ordering Information

37_05.eps GND INPUT OUTTAB IS VOUT 2 SOT-223 TO-263 Front View Front View rebmuNtraPe gakcaP eciveD gnikraM TSJ52-73PMI3 22-TOS5 273 TSJ03-73PMI3 22-TOS0 373 TSJ33-73PMI3 22-TOS3 373 MCJ52-73PMI3 62-OTM CJ5273 MCJ03-73PMI3 62-OTM CJ0373 MCJ33-73PMI3 62-OTM CJ3373 spe.50elbaT_73 snoitpOtuptuOr ebmuNgniredrOtraP egatloV mumixaM tnerruCtnecseiuQ taegatloVtuoporD Am008 322-TOS egakcaP 362-OT egakcaP V5.25 7 µAV 59.0T SJ52-73PMIM CJ52-73PMI V0.35 7 µAV 59.0T SJ03-73PMIM CJ03-73PMI V3.35 7 µAV 59.0T SJ33-73PMIM CJ33-73PMI spe.60t_73 Note: Tape and reel shipping is available for the SOT-223 and TO-263 packages. Append the TAPE AND REEL designation “/T” to the o rdering part number for tape and reel devices. For example, the IMP37-25JST/T is a 2.5V SOT-223 packaged device shipped in reels. rebmuNniPe maNn oitcnuF 1D NGn iPdnuorG 2T UOe gatloVtuptuO 3T UPNIe gatloVtupnI BATB ATe gatloVtuptuO spe.30elbaT_73

© 1999 IMP , Inc. 408-432-9100/www.impweb.com 3 IMP3IMP3 77 Absolute Maximum Ratings

Electrical Characteristics

These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All voltages are with respect to ground. Specifications apply over the junction operating temperature range of T J = 0°C to +125°C unless otherwise noted. Notes: 1. See thermal regulation specification for changes in output voltage due to heating effects. Load regulation and line reg ulation are measured with low duty cycle pulse testing to maintain a constant junction temperature. 2. Dropout voltage is specified over the full output current range. Dropout voltage is defined as the minimum input/output differential measured at the specified output current. 3. Minimum load current is defined as the minimum output current required to maintain regulation. retemaraPl obmySx iffuSs noitidnoCn iMp yTx aMs tinU egatloVtuptuOV TUO 52–I TUO V,Am01= NI T,V58.4= J 52=C °5 74.25 .25 25.2V 03– I TUO V,Am01= NI T,V5= J 52=C °7 9.20 0.33 0.3 33–I TUO V,Am01= NI T,V5= J 52=C °7 62.30 3.33 33.3 noitalugeReniL )1etoN( 52–I TUO V52.4,Am01= (≤ V NI )≤ V5.52 19 1 Vm 03–I TUO V5.4,Am01= ≤ V NI ≤ V5.52 19 1 33–I TUO V5.4,Am01= ≤ V NI ≤ V5.52 19 1 noitalugeReniL )1etoN( 52–I TUO V52.4,Am01= (≤ V NI )≤ T,V5.5 A 52=C °8 .23 .4 Vm 03–I TUO V5.4,Am01= ≤ V NI ≤ T,V5.5 A 52=C °8 .23 .4 33–I TUO V5.4,Am01= ≤ V NI ≤ T,V5.5 A 52=C °8 .23 .4 noitalugeRdaoL )1etoN( 52–V NI Am5,V52.4= ≤ I TUO ≤ Am0085 20 3V m 03–V NI Am5,V57.4= ≤ I TUO ≤ Am0085 20 3 33–V NI Am5,V57.4= ≤ I TUO ≤ Am0085 20 3 egatloVtuoporD )2etoN( xx– I TUO Am001=8 .0V I TUO Am008=5 9.0 timiLtnerruCI )XAM(TUO xx–T J 52=C °0 080 590 021A m tnerruCdaoLmuminiMx x– 0.5A m tnerruCtnecseiuQI Q xx–V NI ≤ V66 35 7 µA noitalugeRlamrehTT A 52=C °e sluPsm03,1 0.01 .0W /% noitcejeRelppiRf ELPPIR V,zH021= NI T,V5= A 52=C ° V ELPPIR I,p-pV1= DAOL Am01= 154 5B d ytilibatSerutarepmeT 5.0% ytilibatSmreTgnoLT A 521=C °s rH0001,3 .0% esioNtuptuOSMRV fo%( TUO zH01,) ≤ f≤ T,zHk01 J 52=C °3 00.0% ecnatsiseRlamrehT )322-OT(BATtaesaC-ot-noitcnuJ5 1° W /C )362-OT(BATtaesaC-ot-noitcnuJ0 1 spe.70t_73

4 408-432-9100/www.impweb.com © 1999 IMP, Inc. IMP3IMP3 77

Application Information

The IMP37 voltage r egulator ICs of fer self-pr otection featur es which include short-circuit current protection and automatic thermal shutdown (for junction temperature above 165° C). Circuit Stability Like all regulators, an output filter capacitor is required for circuit sta- bility. Besides smoothing the output, the output capacitor “completes” the regulator’s frequency compensation. The ESR of the output capacitor should be less than 0.5 W . Low ESR capacitors ar e preferred. Table 1 shows recommended minimum capacitance values for both aluminum and tantalum capacitors. Lar ger values of output capaci - tance do not cause stability problems. Table 1. Recommended Output Bypass Capacitors lum capacitor is suitable for most applications. Figure 1. Fixed 3.3V Regulator equation: TJ = TA + (PD x Q JA). Table 2. Thermal Resistance of Packages mum junction temperature rating must not be exceeded. *Min. 15µF Tantalum or 100µF Aluminum. Capacitor May Be Increased Without Limit.

© 1999 IMP, Inc. 408-432-9100/www.impweb.com 5 Package Dimensions Plastic SOT-223 (4-Pin) E A e1A1 C H e D S B Q SOT -223 (4-Pin).eps TO-263 (3-Pin) D L E e B A C 0° - 8° TO-263 (3-Pin).eps sehcnI sretemilliM niM xaM niM xaM *)niP-4(322-TOScitsalP A 760.0 060.0 07.1 05.1 1A 400.0 8000.0 01.0 20.0 B 421.0 611.0 51.3 59.2 1B 330.0 620.0 58.0 56.0 C 410.0 010.0 53.0 52.0 D 462.0 842.0 07.6 03.6 e MON5090.0 MON03.2 1e MON181.0 MON05.4 E 641.0 031.0 07.3 03.3 h 782.0 462.0 03.7 07.6 S 140.0 330.0 50.1 58.0 t 150.0 340.0 03.1 01.1 Q XAM°01 XAM°01 1Q °61 °01 °61 °01 2Q °61 °01 °61 °01 **)niP-3(362-OT A 061.0 091.0 B 020.0 930.0 2B 540.0 550.0 C 810.0 920.0 2C 540.0 550.0 D 043.0 083.0 E 083.0 504.0 e CSB001.0 L 575.0 526.0 1L 090.0 011.0 2L ——— 550.0 AA162-OTgniwarDCEDEJ* AA362-OTgniwarDCEDEJ** ♦ .leeRdnaepaTrofrebmuNtraPotT/ddA spe.40elbaT_73

IMP, Inc. Corporate Headquarters 2830 N. First Street San Jose, CA 95134-2071 Tel: 408-432-9100 Tel: 800-438-3722 Fax: 408-434-0335 Fax-on-Demand: 1-800-249-1614 (USA) Fax-on-Demand: 1-303-575-6156 (International) e-mail: info@impinc.com http://www.impweb.com The IMP logo is a registered trademark of IMP, Inc. All other company and product names are trademarks of their respective owners. © 1999 IMP, Inc. Printed in USA Publication #:8002 Revision: C Issue Date: 07/22/99 Type: Preliminary