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1/12 xb1117 series 1a low dropout positive voltage regulator ? ? ? ? general description the xb1117 series is 1a bi-polar transistor ldo voltage regulator. output voltage of the xb1117p se ries is fixed to 1.8v, 2.5v, 3.3v, and 5.0v. the xb1117k series output voltage is adjustable by the external resistors. please refer to the absolute maximum ratings for the difference between t he rated input voltage of the xb1117p50 (v out =5.0v) and xb1117p18, 25, 31, k12b. with the dropout voltage 1.2v (typ.), output current c an be generated up to 1a. the built-in overcurrent circuit and thermal protection circuit start to operate when either one of out put put current reaches the curr ent limit level or junction temperature reaches the temper ature limit. the xb1117 series provide stable line and load regulation by using an input capacitor and an output capacitor (10 f, tantalum). package is available in sot-223. a pplic a tions ? highly efficient linear regulators ? 5v ~ 3.3v dc / dc converter ? battery charger ? local power supply inside equipment ? battery powered equipment typical application circuit ? typical performance characteristics ? reference voltage vs. ambient temperature etr0315_005a features maximum output current : 1a output voltages : 1.8v, 2.5v, 3.3v, 5.0v, adj output voltage accuracy : ? 1% low dropout voltage : 1.2v @ i out =1a line regulation (t yp.) : 0.04% (adj) load regulation (typ.) : 0.1% (adj) a djust pin current : less than 120 a (adj) protection circuit : over-current protection thermal protection package : sot-223 environmentally friendly : eu rohs compliant, pb free
2/12 xb1117 series pin number pin name functions 1 adj/gnd adj/ground 2 v out output 3 v in input * the electrical potential of the package fin is the same as the v out pin. designator description symbol description p fixed v out type ? type of regulators k adjustable v out type 181 fixed v out 1.80v ( ? 1%) 251 fixed v out 2.50v ( ? 1%) 331 fixed v out 3.30v ( ? 1%) 501 fixed v out 5.00v ( ? 1%) ??? output voltage & accuracy 12b adjustable v out 1.25v ( ? 1%) ?? - ? packages taping type (*2) fr-g sot-223 sot-223 (top view) pin configuration pin assignment product classification ? ordering information xb1117 ?????? - ? (*1) (*1) the ?-g? suffix indicates that the products are hal ogen and antimony free as well as being fully rohs compliant. (*2) the device orientation is fixed in it s embossed tape pocket. for reverse orient ation, please contact your local torex sales office or representative. (standard orientation: ? r- ? , reverse orientation: ? l- ? )
3/12 xb1117 series block diagram
4/12 xb1117 series parameter symbol ratings units input voltage v in 10.0 v thermal resistance (junction to case) j c 15 thermal resistance (junction to ambient) j a 160 ? /w power dissipation ( ? t=100 ? ) p d 625 mw operating temperat ure range topr 0 ~ 70 operating junction temperature range t j 0 ~ 125 storage temperature range tstg - 65 ~ 150 lead temperature tlead 260 ? parameter symbol conditions min. typ. max. units 4.950 5.000 5.050 output voltage v out v in =7.0v i out =0a *over temp. 4.900 5.000 5.100 v line regulation ? v out1 7.0v ? v in ? 9.0v i out =0a *over temp. - 1 6 - 5.0 15.2 load regulation ? v out2 v in =7.0v 0a ? i out ? 1.0a *over temp. - 10.1 20.2 mv - 1.2 1.4 dropout voltage v dif ? v out = ? 1 ? 0a ? i out ? 1.0a *over temp. - 1.3 - v current limit i lim 7.0v ? v in ? 10.0v *over temp. 1.0 1.5 - a supply current i ss v in =7.0v 0a ? i out ? 1.0a *over temp. - 6 13 ma temperature coefficient t c 7.0v ? v in ? 10.0v 0a ? i out ? 1.0a - 50 - ppm/ ? temperature stability t s v in =7.0v i out =100ma *over temp. - 0.5 - ? a bsolute maximum ratings ta = 2 5 ? *over temp. = over temperature 0 ? 70 ? *stress above the listed absolute maximum rati ng may cause permanent damage to the device. ** the rated values of the xb1117p18 / 25 / 30 (v out =1.8v, 2.5v and 3.0v) and xb1117k type are different from that of the xb1117p50 (v out =5.0v). electrical characteristics xb1117p501 xb1117p501
5/12 xb1117 series parameter symbol ratings units input voltage v in 7.0 v thermal resistance (junction to case) j c 15 thermal resistance (junction to ambient) j a 160 ? /w power dissipation ? ( ? t=100 ? ) p d 625 mw operating temperature range t opr 0 ~ 70 operating temperature range t j 0 ~ 125 storage temperature range t stg -65 ~ 150 lead temperature t lead 260 ? parameter symbol conditions min. typ. max. units output voltage v out v in =5.0v i out =0a *over temp. 1.782 1.800 1.818 v line regulation ? v out1 4.75v ? v in ? 7.0v i out = 0a - 1.0 5.5 mv - 1.80 18.2 load regulation ? v out2 v in =5.0v 0a ? i out ? 1.0a *over temp. - 3.70 22.0 mv - 1.2 1.4 dropout voltage vdif ? v out = ? 1 ? 0a ? i out ? 1.0a *over temp. - 1.3 - v current limit i lim 4.75v ? v in ? 7.0v *over temp. 1.0 1.5 - a supply current i ss v in =5.0v 0a ? i out ? 1.0a *over temp. - 6 13 ma temperature coefficient t c 4.75v ? v in ? 7.0v 0a ? i out ? 1.0a 50 - ppm/ ? temperature stability t s v in =5.0v i out =100ma *over temp. - 0.5 - ? standard value parameter symbol conditions min. typ. max. units 2.475 2.500 2.525 output voltage v out v in =5.0v i out =0a *over temp. 2.450 2.500 2.550 v line regulation ? v out1 4.75v ? v in ? 7.0v i out =0a - 1.0 6.8 mv - 2.5 25.3 load regulation ? v out2 v in =5.0v 0a ? i out ? 1.0a *over temp. - 5.1 30.3 mv - 1.2 1.4 dropout voltage vdif ? v out = ? 1 ? 0a ? i out ? 1.0a *over temp. - 1.3 - v current limit i lim 4.75v ? v in ? 7.0v *over temp. 1.0 1.5 - a supply current i ss v in =5.0v 0a ? i out ? 1.0a *over temp. - 6 13 ma temperature coefficient t c 4.75v ? v in ? 7.0v 0a ? i out ? 1.0a - 50 - ppm/ ? temperature stability t s v in =5.0v i out =100ma *over temp. - 0.5 - ? a bsolute maximum ratings t j =25 ? *stress above the listed absolute maximum rati ng may cause permanent damage to the device. electrical characteristics xb1117p181 *over temp. = over temperature (0 ? 70 ? ) t j =25 ? *over temp. = over temperature (0 ? 70 ? ) xb1117p181, p251, p331, k12b xb1117p251
6/12 xb1117 series parameter symbol conditions min. typ. max. units 3.267 3.300 3.333 output voltage v out v in =5.0v i out =0a *over temp. 3.234 3.300 3.366 v line regulation ? v out1 4.75v ? v in ? 7.0v i out =0a - 1.0 4.5 - 3.4 10.0 load regulation ? v out2 v in =5.0v 0a ? i out ? 1.0v *over temp. - 6.7 13.4 mv - 1.2 1.4 dropout voltage vdif ? v out = ? 1 ? 0a ? i out ? 1.0a *over temp. - 1.3 - v current limit i lim 4.75v ? v in ? 7.0v *over temp. 1.0 1.5 - a supply current i ss v in =5.0v 0a ? i out ? 1.0a *over temp. - 6 13 ma temperature coefficient t c 4.75v ? v in ? 7.0v 0a ? i out ? 1.0a - 50 - ppm/ ? temperature stability t s v in =5.0v i out =100ma ? over temp. - 0.5 - ? parameter symbol conditions min. typ. max. units 1.238 1.250 1.262 reference voltage vref v in =5.0v i out =10ma *over temp. 1.225 1.250 1.275 v line regulation ? v out1 4.75v ? v in ? 7.0v i out =0a - 0.04 0.20 ? - 0.1 0.3 load regulation ? v out2 v in =5.0v 10ma ? i out ? 1.0a *over temp. - 0.2 0.4 ? - 1.2 1.4 dropout voltage vdif ? v out = ? 1 ? 10ma ? i out ? 1.0a *over temp. - 1.3 - v current limit i lim 2.75a ? v in ? 7.0v *over temp. 1.0 1.5 - a temperature coefficient t c 2.75v ? v in ? 7.0v 10ma ? i out ? 1.0a - 50 - ppm/ ? 55 - adjust pin current i adj 2.75v ? v in ? 7.0v 10ma ? i out ? 1.0a *over temp. - - 120 a adjust pin current change ? i adj 2.75v ? v in ? 7.0v 10ma ? i out ? 1.0a *over temp. - 0.2 5.0 a temperature stability t s v in =5.0v i out =100ma *over temp. - 0.5 - ? minimum load current i out v out =5.0v - - 10 ma xb1117k12b t j =25 ? *over temp. = over temperature (0 ? 70 ? ) t j =25 ? xb1117p331 *over temp. = over temperature (0 ? 70 ? ) electrical characteristics (continued)
7/12 xb1117 series operational explanation 1. output voltage adjustment the xb1117 series provide a stable output by comparing the out put voltage to an internal reference voltage. with the adjustable xb1117k type, a 1.25v reference voltage (v ref ) is fixed between the v out pin and the adj pin and the external resistors r1 and r2 are used to set the output voltage. the re sistance values of r1 and r2 should be set so as to provide a minimum load current of 10ma. the output voltage is given by the following equation. v out =v ref (1+r2/r1)+i adj x r2 the output voltage of the xb1117p type is internally fixed to 1.8v, 2.5v, 3.3v, and 5.0v so external resistors are not necessary. 2. stability and load regulation the xb1117 series requires a load capacitor between the v out pin and the gnd pin to provide phase compensation thereby ensuring stability of the output voltage. ei ther a tantalum capacitor of more than 10 f (typ.) or an aluminum electrolytic capacitor of more than 50 f (typ.) should be connected. (note : the capacitor's esr value should not exceed 0.5
.) the output capacitor does not have a theoretical upper limit so increasing its value will increase stability. c l =100 f or more is typical for high current regulator design. in order to avoid any reductions in output voltage accuracy wi th the xb1117k type, we recommend not to place a parasitic resistor (rp) between the v out pin and the divider resistor r1. the parasiti c resistor (rp) does not influence the output however if the divider resistor r1 is directly connected to the v out pin. with the xb1117p type, although external resist or (r1) is internally connected to the v out pin, stability can be maintained by not wiring a parasitic resistor to the gnd pin.
8/12 xb1117 series 3. thermal protection xb1117 series has thermal protection which limits junction temperature to 150 ? . however, device functionally is only guaranteed to a maximum junction temperature of + 125 ? . the power dissipation and junction temperature for the xb1117 series are given by; p d =(v in -v out ) x i out t j =ta+(p d ja ) note t j must not exceed 125 ? . 4. current limit protection xb1117 series is protected against overload conditions. current protec tion is triggered at 1.5a (typ.). 5. thermal consideration the xb1117 series contain thermal limiting circuitry designed to protect itself from over-tem perature conditions. even for normal load conditions, maximum junction temperature ratings mu st not be exceeded. as ment ioned in thermal protection section, we need to consider all sources of thermal resistan ce between junction and ambient. it includes junction-to-case, case-to-heat-sink interface and heat sink thermal resistance itself. junction-to-case thermal resistance is specif ied from the ic junction to the bottom of the case directly below the die. proper mounting is required to ensure the best possible thermal flow from this area of the package to t he heat sink. the case of all devices in this product series is electrical ly connected to the output. t herefore, if the case of t he device is not electricall y isolated, a thermally conductive spacer is recommended. application circuits ? adjustable output voltage operational explanation (continued)
9/12 xb1117 series ? regulator with reference voltage application circuits (continued) ? regulator with reverse diode protection
10/12 xb1117 series typical performance characteristics (5) adjust pin current vs. ambient temperature (3) output short circuit current vs. dropout voltage (1) load regulation vs. ambient temperature (2) reference voltage vs. ambient temperature (6) supply current vs. dropout voltage (4) dropout voltage vs. output current (8) line transient response (7) load transient response
11/12 xb1117 series mark product series b xb1117xxxxfx mark product series k xb1117kxxxfx p xb1117pxxxfx mark output voltage (v) product series b adj xb1117k12bfx k 1.8 xb1117p181fx t 2.5 xb1117p251fx 2 3.3 xb1117p331fx m 5.0 xb1117p501fx ? packaging information ? sot-223 marking rule ? sot-223 ? represents product series ? represents fixed or adjustable output voltage ? represents output voltage ? represents production lot number 0 to 9, a to z repeated. (g , i, j, o, q, w are excepted.) sot-223 (top view)
12/12 xb1117 series 1. the products and product specifications cont ained herein are subject to change without notice to improve performance characteristic s. consult us, or our representatives before use, to confirm that the informat ion in this datasheet is up to date. 2. we assume no responsibility for any infri ngement of patents, pat ent rights, or other rights arising from the use of any information and circuitry in this datasheet. 3. please ensure suitable shipping controls (including fail-safe designs and aging protection) are in force for equipment employing products listed in this datasheet. 4. the products in this datasheet are not devel oped, designed, or approved for use with such equipment whose failure of malfuncti on can be reasonably expected to directly endanger the life of, or cause significant injury to, the user. (e.g. atomic energy; aerospace; transpor t; combustion and associated safety equipment thereof.) 5. please use the products listed in this datasheet within the specified ranges. should you wish to use the products under conditions exceeding the specifications, please consult us or our representatives. 6. we assume no responsibility for damage or loss due to abnormal use. 7. all rights reserved. no part of this dat asheet may be copied or reproduced without the prior permission of torex semiconductor ltd.

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