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1/10 www.rohm.com 2011.02 - rev.b ? 2011 rohm co., ltd. all rights reserved. secondary ldo regulators secondary fixed output ldo regulators ba jc5 series secondary variable output ldo regulator ba00jc5wt ? description the ba jc5 are low-saturation regulators with an output current of 1.5 a and a voltage accuracy of ? 1%. a broad output voltage range is offered, from 1.5v to 12v, and built-in over current protection and thermal shutdown (tsd) circuits prevent damage due to short-circuiting and overloading, respectively. ? features 1) output current: 1.5a (min.) 2) output voltage accuracy: ? 1% 3) broad output voltage rang e available: 1.5v -12v (ba jc5 series) 4) low saturation-voltage type with pnp output 5) built-in overcurrent protection circuit 6) built-in thermal shutdown circuit 7) integrated shutdown switch (ba jc5wt) 8) operating temperature range: ? 40 to +105 ? applications all electronic devices that use microcontrollers and logic circuits no.11024ebt03
ba jc5 series,ba00jc5wt technical note 2/10 www.rohm.com 2011.02 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? product lineup part number 1.5 1.8 2.5 3.0 3.3 5 .0 6.0 6.3 8.0 9.0 12.0 variable package bajc5t ? ? ? ? ? ? ? ? ? ? ? - to220fp-3 ba jc5wt - - - - - - - - - - - ? to220fp-5 (v5) part number: ba jc5 a b c symbol description a output voltage specification output voltage (v) output voltage (v) 15 1.5 v typ 60 6.0 v typ 18 1.8 v typ 63 6.3 v typ 25 2.5 v typ 80 8.0 v typ 30 3.0 v typ 90 9.0 v typ 33 3.3 v typ j2 12.0 v typ 50 5.0 v typ 00 variable b existence of switch with w: a shutdown switch is provided. without w: no shutdown switch is provided. c package t: to20fp-5, to220fp-5 ? v5, to220fp-3 ? absolute maximum ratings (ta = 25 ) parameter symbol ratings unit power supply voltage v cc 18 *1 v power dissipation to220fp-3 p d 2000 *2 mw to220fp-5 2000 *2 to220fp-5 ?v5 2000 *2 operating temperature range t opr ? 40 to +105 ambient storage temperature t stg ? 55 to +150 maximum junction temperature t jmax 150 *1 must not exceed pd *2 derated at 16mw/ at ta>25 ? recommended operating conditions parameter symbol ratings unit min. max. input power supply voltage v cc *3 3.0 16.0 v input power supply voltage vc c *4 v o + 1.0 16.0 v output current i o - 1.5 a variable output voltage setting value v o 1.5 12 v *3 when output voltage is 1.5 v, 1.8 v, or 2.5 v. *4 when output voltage is 3.0 v or higher.
ba jc5 series,ba00jc5wt technical note 3/10 www.rohm.com 2011.02 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? electrical characteristics ba jc5t(unless otherwise specified, ta = 25 ; vcc = v ccdc *5 ) parameter symbol limits unit conditions min. typ. max. output voltage vo vo (t) ? 0.99 vo (t) vo (t) ? 1.01 v io = 200 ma minimum i/o voltage difference *6 ? vd - 0.3 0.5 v io = 200 ma, vcc = 0.95 ? vo output current capacity io 1.5 - - a input stability *7 reg.i - 5 60 mv vcc = vo + 1.0 v 16 v, io = 200 ma load stability reg.l - 5 60 mv io = 5 ma 1.5 a temperature coefficient of output voltage *8 tcvo - ? 0.02 - %/ io = 5 ma, tj = 0 to 125 vo (t): set output voltage *5 vo = 1.5 v, 1.8 v, 2.5 v : vcc = 3.3 v, vo = 3.0 v, 3.3 v : vcc = 5 v, vo = 5.0 v : vcc : 8 v, vo = 6.0 v, 6.3 v : vcc = 9.0 v, vo = 8.0 v : vcc = 11 v, vo = 9.0 v : vcc = 12 v, vo = 12 v : vcc = 15 v *6 vo 3.3 v *7 change vcc from 3.0 v to 16 v if 1.5 v vo 2.5 v. *8 operation guaranteed ba00jc5wt ( ? v5)(unless otherwise specified, ta = 25 , vcc = 3.3 v, v ctl = 3 v, r1 = 30 k ? , r2 = 30 k ? *9 ) parameter symbol limits unit conditions min. typ. max. reference voltage vo 1.2375 1.250 1.2625 v io = 50 ma shutdown circuit current isd - 0 10 ? a v ctl = 0 v while in off mode minimum i/o voltage difference ? vd - 0.3 0.5 v io = 500 ma, vcc = 2.5 v output current capacity io 1.5 - - a input stability reg.i - 5 60 mv vcc = 4.5 v 16 v, io = 200 ma load stability reg.l - 5 60 mv io = 5 ma 1.5 a temperature coefficient of output voltage *10 tcvo - ? 0.02 - %/ io = 5 ma, tj = 0 to 125 *9 vout = vc ? (r1 + r2) / r1 (v) *10 design guarantee (no total shipment inspection is made.)
ba jc5 series,ba00jc5wt technical note 4/10 www.rohm.com 2011.02 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? electrical characteristics curves (unless otherwise specified, ta = 25 ; vcc = 8 v; v ctl = 3 v; i o = 0 ma) 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0 500 1000 15 00 output current i out [ma] dropout voltage vd [mv] 0 1 2 3 4 5 6 0 2 4 6 8 10 121416 s upp ly v ol tag e vc c [v ] o utput v ol tag e v out [v] fig.1 circuit current .3 input stability (io = 1.5 a) fig.4 load stability fig.5 i/o voltage difference fig.6 ripple rejection fig.7 output voltage vs temperature fig.8 circuit current temperature fig.9 circuit current classified by load fig.10 ctl voltage vs output voltage fig.11 ctl voltage vs ctl current fig.12 thermal shutdown circuit (io = 5 ma) 0 0.1 0.2 0.3 0.4 0.5 0.6 0 2 4 6 8 10121416 supp l y v ol tag e v cc [v ] circuit urrent icc [ma] [ba50jc5t] [ba50jc5t] 0 1 2 3 4 5 6 0 2 4 6 8 10 121416 s upp ly v ol tag e vc c [v ] o utput v ol tag e v out [v] [ba50jc5t] 0 1 2 3 4 5 6 00.511.522.5 output current i out [a] o utput v ol tag e v out [v] [ba50jc5t] [ba50jc5t] 0 10 20 30 40 50 60 70 80 10 100 1000 10000 100000 1000000 frequency f [hz] ripple rejection r.r. [db] [ ba50jc5t ] 0 1 2 3 4 5 6 7 8 9 10 -40-200 20406080100 te mp era ture ta [ ] o utput v ol tag e v out [v] [ba50jc5t] 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 -40 -20 0 20 40 60 80 100 temperature ta [ ] circuit urrent icc [ma] [ ba50jc5t ] 0 10 20 30 40 50 60 70 80 90 0 500 1 000 150 0 output current i out [a] circuit urrent icc [ma] [ ba50jc5t ] 0 1 2 3 4 5 6 0246810 control voltage v ct l [v ] output voltage v out [v] [ba50jc5t] 0 0.1 0.2 0.3 0.4 0.5 0.6 02 46 81012141618 control voltage v ct l [v ] control urrent i ctl [ a] [ ba50jc5t ] 0 1 2 3 4 5 6 7 8 100 120 140 160 1 80 200 temperature ta [ ] output voltage v out [v] [ ba50jc5t ] fig.2 input stability(io=0ma)
ba jc5 series,ba00jc5wt technical note 5/10 www.rohm.com 2011.02 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? block diagrams / standard example application circuits ? input / output equivalent circuits 31k 2k 27k ctl vcc r2 r1 vcc out fig.15 [ba jc5t] fig.13 [ba00jc5wt] fig.14 * for the ba00jc5wt, connect r1 and r2 externally between the adj and gnd pins and between the out and adj pins. pin no. pin name function 1 vcc power supply voltage input 2 gnd gnd 3 out voltage output pin no. pin name function 1 ctl output voltage on/off control 2 vcc power supply voltage input 3 gnd gnd 4 out voltage output 5 c adj pin 1 2345 12345 to220fp-5 to220fp-5 (v5) to220fp-3 123 top vw top view equation: vout = vc ? (r1 + r2) / r1 (vc = 1.25 v (typ.)) the recommended r1 value is approximately 30 k ? to 150 k ? . pin external capacit setting range vcc (1 pin approximately 0.33 ? f out (3 pin) 22 ? f to 1000 ? f pin external capacit setting range vcc (2 pin) approximately 0.33 ? f out (4 pin) 22 ? f to 1000 ? f tsd ocp drive r vref 1 0.33 f vcc vcc gnd out 2 3 22 f tsd ocp driver vref 1 0.33 f vcc ctl gnd out 3 4 22 f 2 vcc c 5 vcc r2 r1
ba jc5 series,ba00jc5wt technical note 6/10 www.rohm.com 2011.02 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? thermal derating curve ? to220fp-3/to220fp-5/to220fp-5 (v5 fig.17 the characteristics of the ic are greatly influenced by the operating temperature. if the te mperature exceeds the maximum junction temperature t jmax , deterioration or damage may occur. implement proper thermal designs to ensure that power dissipation is within the permissible range in order to prev ent instantaneous damage resulting from heat and maintain the reliability of the ic for long-term operation. the following method is used to calculate the power consumption pc (w): pc = (vcc ? vo) ? io + vcc ? icca power dissipation pd pc the load current io is calculated: calculation example: vcc = 6.0v and vo = 5.0v at ta = 85 refer to the above and implement proper thermal designs so t hat the ic will not be used under excessive power dissipation conditions under the entire op erating temperature range. the power consumption pc of the ic in the event of shorting (i.e. the vo and gnd pi ns are shorted) can be obtained from the following equation: pc = vcc ? (icca + ishort) (ishort: short current) :w 0 15 25 20 10 5 25 50 7 5 125 15 0 100 0 a mbient temperature ta [ c ] (1)20.0 (2)2.0 (2) during ic without heat sink operation. ? j-a = 62.5 (c/w) (1) when using an infinite heat sink. ? j-c = 6.25 (c/w) power dissipation pd [w] ? ja = 62.5c/w ? ? 16.0mw/c 25c = 2000mw ? 85c = 1040mw vcc : input voltage vo : output current i o : load current icca : circuit current io pd ? vcc ? icca vcc ? vo 1.040 ? 6.0 ? icca 6.0 ? 5.0 io 860ma (icca ? 30ma)
ba jc5 series,ba00jc5wt technical note 7/10 www.rohm.com 2011.02 - rev.b ? 2011 rohm co., ltd. all rights reserved. ? operation notes ? vcc pin insert a capacitor (0.33 ? f approx.) between vcc and gnd. the capacitance will vary depending on the application. use a suitable capacitance and implement designs with sufficient margins. ? gnd pin verify that there is no potential difference between the ground of the applic ation board and the ic. if there is a potential difference, the set voltage will not be output accurately, resulting in unstable ic operation. therefore, lower the impedance by designing the ground pattern as wide and as short as possible. ? ctl pin the ctl pin turns on at an operating power supply voltage of 2.0 v or higher and turns off at 0.8 v or lower. there is no particular order when turning the power supply and ctl pins on or off. fig.18 input equivalent circuit ? vo pin insert a capacitor between the vo and gnd pins in order to prevent output oscillation. fig.19 output equivalent circuit fig. 20 io vs esr the capacitance may vary greatly with temperature changes, t hus making it impossible to completely prevent oscillation. therefore, use a tantalum alum inum electrolytic capacitor with a low esr (equivalent serial resistance). the output will oscillate if the esr is too high or too low, so refer to the esr characterist ics in fig. 20 and operate the ic within the stabl e region. use a capacitor within a capacitance between 22 ? f and 1,000 ? f. 31 k ? 2 k ? 27 k ? ctl out 22 ? f ic 200 400 600 800 1000 0 0.05 0.075 0.1 0.2 0.5 1.0 2.0 io [ma] esr [? ] oscillation region oscillation region stable region 10.0
ba jc5 series,ba00jc5wt technical note 8/10 www.rohm.com 2011.02 - rev.b ? 2011 rohm co., ltd. all rights reserved. vcc output pin back current prevention diode bypass diode ? notes for use 1. absolute maximum ratings an excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. if any over rated values will expect to ex ceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses. 2. gnd voltage the potential of gnd pin must be minimu m potential in all operating conditions. 3. thermal design use a thermal design that allows for a sufficient margin in light of the power dissipation (pd) in actual operating conditions. 4. inter-pin shorts and mounting errors use caution when positioning the ic fo r mounting on printed circuit boards. the ic may be damaged if there is any connection error or if pins are shorted together. 5. actions in strong electromagnetic field use caution when using the ic in the presence of a strong electromagnetic field as doing so may cause the ic to malfunction. 6. testing on application boards when testing the ic on an application board, connecting a capa citor to a pin with low impedance subjects the ic to stress. always discharge capacitors after each process or step. always turn the ic's power supply off before connecting it to or removing it from a jig or fixture during the inspection process. ground the ic during assembly steps as an antistatic measure. use similar precauti on when transporting or storing the ic. 7. regarding input pin of the ic this monolithic ic contains p+ isolation and p substrat e layers between adjacent elements in order to keep them isolated.p-n junctions are formed at the in tersection of these p layers with the n layers of other elements, creating a parasitic diode or transistor. for example, the relation between each potential is as follows: when gnd > pin a and gnd > pin b, the p-n j unction operates as a parasitic diode. when gnd > pin b, the p-n junction operates as a parasitic transistor. parasitic diodes can occur inevitable in the structure of th e ic. the operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. accordingly, methods by which parasitic diodes operate, such as applying a voltage that is lower than the gnd (p substrate) voltage to an input pin, should 8. ground wiring pattern when using both small signal and large current gnd patterns, it is recommended to isolate the two ground patterns, placing a single ground point at the grou nd potential of application so that the pattern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal ground voltage. be careful not to change the gnd wiring pattern of any external components, either. 9. thermal shutdown circuit the ic incorporates a built-in thermal shutdown circuit (tsd circuit). the thermal shutdown circuit (tsd circuit) is designed only to shut the ic off to prevent thermal runaway. it is not designed to protect the ic or guarantee its operation. do not continue to use the ic after oper ating this circuit or use the ic in an environment where the operation of this circuit is assumed. 10. overcurrent protection circuit an overcurrent protection circuit is incorporated in order to prevention destruction due to short-time overload currents. continued use of the protection circuits should be avoided. please note that the current increases negatively impact the temper ature. 11. damage to the internal circuit or element may occur when t he polarity of the vcc pin is opposite to that of the other pins in applications. (i.e. vcc is shorted with the gnd pin while an external capacitor is charged.) use a maximum capacitance of 1000 f for the output pins. inserting a diode to prevent ba ck-current flow in series with vcc or bypass diodes between vcc and each pin is recommended. parasiti c element fig. 21 bypass diode fig. 22 example of simple bipolar ic architecture ( pin a ) gnd parasitic element gnd (pin b) b c e parasitic elements or transistors gnd p n p n n p p a ? gnd n p p b ??? ( npn ) b n e c gnd p transistor (npn) resistor pin a p substrate parasitic element pin b n p n p substrate n
ba jc5 series,ba00jc5wt technical note 9/10 www.rohm.com 2011.02 - rev.b ? 2011 rohm co., ltd. all rights reserved. ordering part number b a 0 0 j c 5 w t - part numbe r output voltage 00:variable other:fixed current capacity 1.5a shutdown switch w : include package t to220fp-3 to220fp-5 to220fp-5(v5) packaging and forming specification none:tube contener (unit : mm) to220fp-3 23 1 +0.4 3.20.1 0.55 17.0 12.00.2 8.00.2 2.540.5 13.5min. 5.00.2 0.8 2.540.5 1.3 ?0.1 +0.3 10.0 7.0 1.80.2 ?0.2 ?0.1 +0.3 2.60.5 ?0.05 +0.1 +0.2 ?0.1 ?0.1 +0.3 4.5 2.8 ? order quantity needs to be multiple of the minimum quantity. tube container quantity direction of feed 500pcs direction of products is fixed in a container tube (unit : mm) to220fp-5 7.0 10.0 2.8 4.5 1.778 0.50.1 1.2 0.8 1.80.2 8.00.2 0.7 12.00.2 17.0 13.5min. 3.20.1 ?0.2 +0.4 +0.3 ?0.1 ?0.1 +0.2 +0.3 ?0.1 +0.3 ?0.1 2345 1 2.85 ? order quantity needs to be multiple of the minimum quantity. tube container quantity direction of feed 500pcs direction of products is fixed in a container tube
ba jc5 series,ba00jc5wt technical note 10/10 www.rohm.com 2011.02 - rev.b ? 2011 rohm co., ltd. all rights reserved. (unit : mm) to220fp-5(v5) 0.7 7.0 10.0 1.778 1234 5 1.2 0.8 1.80.2 8.00.2 12.00.2 17.0 31.5max. 3.20.1 ?0.2 +0.4 + 0.3 ? 0.1 + 0.3 ? 0.1 2.8 4.5 0.50.1 ?0.1 +0.2 +0.3 ?0.1 (2.85) 4.25 (2.0) 23.4 17.5 25.8 8.15 ? order quantity needs to be multiple of the minimum quantity. tube container quantity direction of feed 500pcs direction of products is fixed in a container tube
r1120 a www.rohm.com ? 2011 rohm co., ltd. all rights reserved. notice rohm customer support system http://www.rohm.com/contact/ thank you for your accessing to rohm product informations. more detail product informations and catalogs are available, please contact us. notes no copying or reproduction of this document, in part or in whole, is permitted without the consent of rohm co.,ltd. the content specied herein is subject to change for improvement without notice. the content specied herein is for the purpose of introducing rohm's products (hereinafter "products"). if you wish to use any such product, please be sure to refer to the specications, which can be obtained from rohm upon request. examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the products. the peripheral conditions must be taken into account when designing circuits for mass production. great care was taken in ensuring the accuracy of the information specied in this document. however, should you incur any damage arising from any inaccuracy or misprint of such information, rohm shall bear no responsibility for such damage. the technical information specied herein is intended only to show the typical functions of and examples of application circuits for the produc ts. rohm does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by rohm and other parties. rohm shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. the products specied in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, ofce-automation equipment, commu- nication devices, electronic appliances and amusement devices). the products specied in this document are not designed to be radiation tolerant. while rohm always makes efforts to enhance the quality and reliability of its products, a product may fail or malfunction for a variety of reasons. please be sure to implement in your equipment using the products safety measures to guard against the possibility of physical injury, re or any other damage caused in the event of the failure of any product, such as derating, redundancy, re control and fail-safe designs. rohm shall bear no responsibility whatsoever for your use of any product outside of the prescribed scope or not in accordance with the instruction manual. the products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). rohm shall bear no responsibility in any way for use of any of the products for the above special purposes. if a product is intended to be used for any such special purpose, please contact a rohm sales representative before purchasing. if you intend to export or ship overseas any product or technology specied herein that may be controlled under the foreign exchange and the foreign trade law, you will be required to obtain a license or permit under the law.

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