5-V Low Drop Fixed Voltage Regulator TLE 4268

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Herbert Craig
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1 5-V Low Drop Fixed Volage Regulaor TLE 4268 Feaures Oupu volage olerance ±2% Very low curren consumpion Low-drop volage Wachdog Seable rese hreshold Overemperaure proecion Reverse polariy proecion Shor-circui proof Suiable for use in auomoive elecronics Wide emperaure range Green Produc (RoHS complian) AEC Qualified P-DSO-8-3, -6, -7, -8, -9 Funcional Descripion This device is a 5-V low-drop fixed-volage regulaor. The P/PG-DSO-2-1,-6,-7,-9,-14,- maximum inpu volage is 45 V. I can deliver an oupu curren of a leas 18 ma. The IC is shor-circui proof and feaures emperaure proecion ha disables he circui in he even of impermissibly high emperaures. The wachdog funcion is disabled as a funcion of he load, so ha a conroller is no inerruped during sleep mode by a wachdog rese. Applicaion Descripion The IC regulaes an inpu volage V I in he range 5.5 V < V I < 45 V o V Q,nom = 5. V. In he even of an oupu volage V Q < V RT, a rese signal is generaed. The wiring of he rese swiching hreshold inpu enables he value of V RT o be reduced. The rese delay ime can be adjused using an exernal capacior. The inegraed wachdog moniors he conneced acive conroller. If here is no rising edge a he wachdog inpu, he rese Type TLE 4268 GS TLE 4268 G Package PG-DSO-8 PG-DSO-2 Daa Shee 1 Rev. 1.6,

2 oupu is se o low. The rese delay capacior provides a wide adjusmen range for he pulse repeiion ime. The wachdog funcion is only acivaed if he load exceeds 8 ma. This ensures ha a microconroller is no acivaed during power-down and he curren drain is no increased. The IC is proeced agains overload and overemperaure. PG-DSO-8 Ι 1 8 N.C. 2 7 RO 3 6 GND 4 5 AEP1954 Q W RADJ D Figure 1 Pin Configuraion (op view) Table 1 Pin Definiions and Funcions Pin Symbol Funcion 1 I Inpu volage 2 N.C. No conneced 3 RO Rese oupu 4 GND Ground 5 D Rese delay 6 RADJ Rese swiching hreshold 7 W Wachdog inpu 8 Q 5 V oupu volage Daa Shee 2 Rev. 1.6,

3 PG-DSO-2 N.C. 1 N.C. 2 RO 3 GND 4 GND 5 GND 6 GND 7 N.C. 8 D 9 RADJ N.C. N.C. Ι GND GND GND GND N.C. Q W AEP154 Figure 2 Pin Configuraion (op view) Table 2 Pin Definiions and Funcions Pin Symbol Funcion 1, 2, 8, 13, N.C. No conneced. 19, 2 3 RO Rese oupu; he open collecor oupu is conneced o he 5-V oupu via an inegraed resisor of 3 kω. 4 7, GND Ground D Rese delay; connec a capacior o ground for delay ime adjusmen. 1 RADJ Rese swiching hreshold; for seing he swiching hreshold, oupu o ground wih volage divider. If his inpu is conneced o ground, he rese is riggered a an oupu volage of 4.5 V. 11 W Wachdog inpu; posiive-edge-riggered inpu for monioring a microconroller. 12 Q 5-V oupu volage; block o ground wih 22 μf capacior, ESR < 3 Ω. 18 I Inpu volage; block o ground direcly on he IC wih ceramic capacior. Daa Shee 3 Rev. 1.6,

4 - + TLE 4268 Circui Descripion The conrol amplifier compares a reference volage, which is kep highly accurae by resisance adjusmen, o a volage ha is proporional o he oupu volage and drives he base of he series ransisor via a buffer. Sauraion conrol as a funcion of he load curren prevens any over-sauraion of he power elemen. If he exernally scaled down oupu volage a he rese hreshold inpu drops below 1.35 V, he exernal rese delay capacior is discharged by he rese generaor. If he volage on he capacior reaches he lower hreshold V DRL, a rese signal is generaed on he rese oupu and no cancelled again unil he upper hreshold volage is exceeded. If he rese hreshold inpu is conneced o GND, rese is riggered a an oupu volage of 4.5 V. A conneced microconroller is moniored by he wachdog logic. If pulses are missing, he res oupu is se o low. The pulse sequence ime can be se wihin a wide range wih he rese delay capacior. The IC also incorporaes inernal circuis for proecion agains: Overload Overemperaure Reverse polariy Inpu Oupu Temperaure Sensor Proecion Circui Conrol Amplifier Rese Generaor 3 1 Rese Oupu Rese Swiching Threshold Adjusmen Bandgap Reference Wachdog 9 Rese Delay 4-7, GND 11 Wachdog Inpu AEB1539 Figure 3 Block Diagram TLE 4268 G (PG-DSO-2) Daa Shee 4 Rev. 1.6,

5 Table 3 Absolue Maximum Raings Parameer Symbol Limi Values Uni Noes Min. Max. Inpu I Inpu volage Inpu curren Rese Oupu RO Volage Curren Rese Delay D Volage Curren Wachdog W V I -3 I I V R -.3 I R V D -.3 I D Wachdog inpu V W V Rese Swiching Threshold RADJ Rese hreshold V RADJ V Oupu Q Oupu volage Oupu curren Ground GND V Q -.3 I Q Curren I GND -1 5 ma Temperaures Juncion emperaure Sorage emperaure T j -4 T S V V V V C C Inernally limied Inernally limied Inernally limied Inernally limied Daa Shee 5 Rev. 1.6,

6 Table 4 Operaing Range Parameer Symbol Limi Values Uni Noes Min. Max. Inpu volage V I 45 V Juncion emperaure T j C Thermal Resisance Juncion ambien (soldered) R hj-a R hj-a K/W K/W PG-DSO-8 1) PG-DSO-2 1) Juncion pin R hj-pin R hj-pin K/W K/W 1) Package mouned on PCB mm 3 ; 35μ Cu; 5μ Sn; Fooprin only; zero airflow. 2) Measured o pin 2. 3) Measured o pin 5. PG-DSO-8 2) PG-DSO-2 3) Opimum reliabiliy and life ime are guaraneed if he juncion emperaure does no exceed 125 C in operaing mode. Operaion a up o he maximum juncion emperaure of 15 C is possible in principle. Noe, however, operaion a he maximum permied raings could affec he reliabiliy of he device. Daa Shee 6 Rev. 1.6,

7 Table 5 Characerisics = ma V I = 13.5 V; -4 C T j 125 C (unless oherwise specified) Parameer Symbol Limi Values Uni Tes Condiion Min. Typ. Max. Oupu volage V Q V 5 ma I Q 15 ma; 6 V V I 28 V Oupu curren limiing I Q ma Curren consumpion I q 3 45 μa I Q I q = I I - I Q Curren consumpion I q 13 2 ma I Q = 15 ma I q = I I - I Q Drop volage V DR.25.5 V I Q = 15 ma 1) Load regulaion ΔV Q,Lo 1 3 mv I Q = 5 o 15 ma Line regulaion ΔV Q,Li 1 3 mv V I = 6 o 28 V I Q = 15 ma Rese Generaor Rese hreshold V Q,r V Rese adjus V RADJ V hreshold Rese low volage V RO,l.2.5 V 1 ma exernal Sauraion volage V D 3 1 mv V Q < V RT Charging curren I D,c μa V D = 1. V Upper rese iming V DU V hreshold Rese delay ime rd ms C D = 1 nf Rese reacion ime rr 2 μs C D = 1 nf Pull-up R RO kω wih resp. o V Q Lower rese iming hreshold V DRL V Daa Shee 7 Rev. 1.6,

8 Table 5 Characerisics (con d) V I = 13.5 V; -4 C T j 125 C (unless oherwise specified) Parameer Symbol Limi Values Uni Tes Condiion Min. Typ. Max. Wachdog Discharge curren I D,d μa V D = 1. V Charging curren I D,c μa V D = 1. V Upper iming V DU V hreshold Lower iming V DWL V hreshold Wachdog period T WP ms C D = 1 nf Wachdog rigger ime T WT ms C D = 1 nf Acivaing curren I Q ma Acivaes wachdog Slew rae dv W /d 5 V/μs from 2% up o 2) 8% V Q 1) Drop volage = V I - V Q (measured when he oupu volage has dropped 1 mv from he nominal value obained a 13.5 V inpu) 2) Wachdog pulse recogniion esed wih 1 khz max. pulse frequency Noe: The rese oupu is low in range from V Q = 1 V o V Q,r. Daa Shee 8 Rev. 1.6,

9 Ι Ι Ι Q Ι Q 1 μf 47 nf TLE 4268G 22 μf V Ι V W W RO D GND RADJ Ι dis Ι R VR V Q Ι d Ι M V RES V D C D 1 nf V Dr = V Ι -V Q Ouside he conrol range AES1541 Figure 4 Tes Circui Daa Shee 9 Rev. 1.6,

10 Rese Timing The power-on rese delay ime is defined by he charging ime of an exernal capacior C D which can be calculaed as follows: C D = (Δ rd I D,c )/ΔV (1) Definiions: C D = delay capacior Δ rd = delay ime I D,c = charge curren, ypical 12 μa ΔV = V DU, ypical 1.8 V V DU = upper delay swiching hreshold a C D for rese delay ime The rese reacion ime rr is he ime i akes he volage regulaor o se he rese ou LOW afer he oupu volage has dropped below he rese hreshold. I is ypically 1 μs for delay capacior of 47 nf. For oher values for C D he reacion ime can be esimaed using he following equaion: rr 2 s/f C D (2) V Ι V Q < rr V Q, r V D dv d Ι D,c = C D V DU V RO rd rr V DRL Power-on-Rese Thermal Volage Dip Undervolage Secondary Overload Shudown a Inpu Spike a Oupu AED31 Figure 5 Timing (Wachdog disabled) Daa Shee 1 Rev. 1.6,

11 V W Ι VΙ V Q T WP V D T WT V DU V DWL V WO WD, L ( VDU ( V DU -V DWL ) ( Ι D, c + Ι D, d ) T = - VDWL ) WT C T WP = Ι D C D, d Ι D, c x Ι D ; D, d ( VDU V WD, L = - DWL ; ) C D Ι D, c AED311_68 Figure 6 Timing of he Wachdog Funcion Daa Shee 11 Rev. 1.6,

12 Drop Volage V DR versus Oupu Curren I Q Curren Consumpion I q versus Oupu Curren I Q mv V dr 7 AED1544 I q 16 ma 14 AED Tj = 125 C Tj = 25 C V I = 13.5 V T j = 25 C ma Ι Q ma 2 I Q Curren Consumpion I q versus Inpu Volage V I Oupu Volage versus Inpu Volage V I I q 24 ma T j = 25 C AED1546 V Q ma AED R L= 33 Ω R L= 33 Ω 4 R R L= 5 Ω L= 1 Ω V 5 V I V VΙ Daa Shee 12 Rev. 1.6,

13 Charge Curren I D,c and Discharge Curren I D,d versus Temperaure T j Timing Threshold V DU, V DWL, V DRL versus Temperaure T j Ι 16 μa Ι V Ι = 13.5 V VD = 1. V D, c AED31 V D V V Ι = 13.5 V V DU AED Ι D, d.4 VDWL, V DRL T j C C Tj Oupu Volage V Q versus Temperaure T j Oupu Curren I Q versus Inpu Volage V I V AED312 3 AED1551 V Q I Q ma T j = 25 C V Ι = 13.5 V V V 5 T j V I Daa Shee 13 Rev. 1.6,

14 Package Oulines ± (1.45) 1.75 MAX..35 x 45 1) MAX B.1.2 M A B 8x 6 ±.2.64 ± Index Marking 1 4 1) A 1) Does no include plasic or meal prorusion of.15 max. per side 2) Lead widh can be.61 max. in dambar area GPS1229 Figure 7 PG-DSO-8 (Plasic Dual Small Ouline) Green Produc (RoHS complian) To mee he world-wide cusomer requiremens for environmenally friendly producs and o be complian wih governmen regulaions he device is available as a green produc. Green producs are RoHS-Complian (i.e Pb-free finish on leads and suiable for Pb-free soldering according o IPC/JEDEC J-STD-2). You can find all of our packages, sors of packing and ohers in our Infineon Inerne Page Producs : hp:// SMD = Surface Mouned Device Dimensions in mm Daa Shee 14 Rev. 1.6,

15 +.15 2) x MAX..1 2x.35 x ) MAX ± ) Index Marking 1) Does no include plasic or meal prorusion of.15 max. per side 2) Does no include dambar prorusion of.5 max. per side GPS594 Figure 8 PG-DSO-2 (Plasic Dual Small Ouline) Green Produc (RoHS complian) To mee he world-wide cusomer requiremens for environmenally friendly producs and o be complian wih governmen regulaions he device is available as a green produc. Green producs are RoHS-Complian (i.e Pb-free finish on leads and suiable for Pb-free soldering according o IPC/JEDEC J-STD-2). You can find all of our packages, sors of packing and ohers in our Infineon Inerne Page Producs : hp:// SMD = Surface Mouned Device Dimensions in mm Daa Shee 15 Rev. 1.6,

16 Version Dae Changes Rev Package version changed: - PG-DSO-2-35 o PG-DSO-2 Package naming harmonized according o Infineon sandards: - PG-DSO-8-16 o PG-DSO-8 Rev Iniial version of RoHS-complian derivae of TLE 4268 Page 1: AEC cerified saemen added Page 1 and Page 14 ff: RoHS compliance saemen and Green produc feaure added Page 1 and Page 14 ff: Package changed o RoHS complian version Legal Disclaimer updaed Daa Shee 16 Rev. 1.6,

17 Ediion Published by Infineon Technologies AG Munich, Germany 213 Infineon Technologies AG All Righs Reserved. Legal Disclaimer The informaion given in his documen shall in no even be regarded as a guaranee of condiions or characerisics. Wih respec o any examples or hins given herein, any ypical values saed herein and/or any informaion regarding he applicaion of he device, Infineon Technologies hereby disclaims any and all warranies and liabiliies of any kind, including wihou limiaion, warranies of non-infringemen of inellecual propery righs of any hird pary. Informaion For furher informaion on echnology, delivery erms and condiions and prices, please conac he neares Infineon Technologies Office ( Warnings Due o echnical requiremens, componens may conain dangerous subsances. For informaion on he ypes in quesion, please conac he neares Infineon Technologies Office. Infineon Technologies componens may be used in life-suppor devices or sysems only wih he express wrien approval of Infineon Technologies, if a failure of such componens can reasonably be expeced o cause he failure of ha life-suppor device or sysem or o affec he safey or effeciveness of ha device or sysem. Life suppor devices or sysems are inended o be implaned in he human body or o suppor and/or mainain and susain and/or proec human life. If hey fail, i is reasonable o assume ha he healh of he user or oher persons may be endangered.

Type Marking Pin Configuration Package SMBT3904/MMBT3904 SOT23 SMBT3904S 2=E 1=B 3=C 1=E1 2=B1 3=C2

Type Marking Pin Configuration Package SMBT3904/MMBT3904 SOT23 SMBT3904S 2=E 1=B 3=C 1=E1 2=B1 3=C2 SMBT94...MMBT94 NPN Silicon Swiching Transisors High D curren gain:. ma o ma Low collecoremier sauraion volage For SMBT94S: Two (galvanic) inernal isolaed ransisors wih good maching in one package omplemenary