TC4949 TELCOM | Alldatasheet
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= felCom . Semiconductor, Inc. TCc4949 Multifunction Very Low Dropout Voltage Regulator FEATURES GENERAL DESCRIPTION @ Operating DC Supply Voltage Range 5.0V to 28V The TC4949 is a monolithic integrated 5.0V voltage @ Transient Supply Voltage up to 40V regulator with a very low dropout and additional functions @ Extremely Low Quiescent Current in such as power—on reset and input voltage sense. It is @ High Precision Standby Output Voltage 5.0V 1% tems especially in automotive applications. @ Output Current Capability up to 100mA ™@ Very Low Dropout Voltage less than 0.4V ORDERING INFORMATION External Capacitor —$—$— SSS ™ Voltage Sense Comparator TC4949VPA 8-Pin PDIP (Narrow) ——40 to +125°C @ Thermal Shutdown and Short Circuit Protections TC4949VOA &-Pin SOIC (Narrow) —40 to +125°C REPRESENTATIVE BLOCK DIAGRAM PIN CONFIGURATIONS Output Vottage [Vour)_ 8-Pin PDIP | | vee fife of cc [==] | | | <= ont | oH ee | must Sn [2| 7] Sour | Ped re Tesses <1 > i* vz [3] 6] RESET > | sence crf] 5] GND 5 zc | ) —— FT| 4 i= | on ae =| Vec [1] @ 1] Your efona Sin [2] = 7] Sour veB] TS [e)Reser cr[4] [5] GND TOINs1 60 1 Com FORTS yes a ere ge or ere Cully and specications of its devices
Multifunction Very Low Dropout Voltage Regulator TC4949 ABSOLUTE MAXIMUM RATINGS* ESD Protection at any pin Output Voltages _ Maximim Junction Temperature... Ta = 150°C oO Me OUD nnn so* “This is a stress rating only, and functional operation of the device at these or any other conditions beyond those indicated in the operation section of Sense Output cee SO = 5.0MA conditions for extended periods of time may affect device reliability. ELECTRICAL CHARACTERISTICS: (Voc = 14V, -40°C < T, < 125°C, unless otherwise specified) Symbol Parameter Test Conditions | min | Typ | Max | Units Vout Output Voitage T, = 25°C, lout = 1.0mA 4.95 "7 B.DV < Veg < 28V, 1.0mA < Igyr < SOMA 49 Veo = 35V, t< 1.05, 1.0mA < Igy- < SOMA 49 VoroP Dropout Voltage lout = 10mA 0.25 Vv lout = 50mA 040 lout = 100mA 0.50 Vio Input to Output Voltage Difference in Undervoltage Condition Veco = 4.0V, lout = 35mA Vv REGwe Line Regulation 6.0V < Voc < 28V, lous = 1.0mA [| - [| 10 [| 2 | mv REGoap _Load Regulation 1.0mA < lout < 100mA [| - [| eo | 2% | mv lun Current Limit Vour=4.5V 200 mA Vout = OV 100 lose Quiescent Current = Ioyr = 0.3mA, T, < 100°C 260 nA Io lout = 100mA 5.0 mA RESET Vrearn Reset Threshold Voltage Vour - 0.5 v VreetHHye Reset Threshold Hysteresis @T, = 25°C 200 mv Treso Reset Pulse Delay Cr= 100nF, Tr 2 100ns [55 [| 100 [ 180 | ms Trean Reset Reson Time_Cy = 100nF [=| #0 [20 | os Vreee Reset Output Low Voltage Rreset = 10kQ to Vout. Voc 2 3.0V Vv Leakage Current Vreser = 5.0V pA Vortk Delay Comparator Threshold Vv Vortth.Hyvs Delay Comparator Threshold Hysteresis mV TOeMs-1 1/600 <
1 Veco Supply Voltage
2 Siw Input of Sense Comparator
3 Vz Output of Preregulator
5 GND Ground
6 RESET Output of Reset Comparator
7 Sour Output of Sense Comparator
8 Vout Main Regulator Output
Figure 1. Output Voltage versus Figure 2. Output Voltage versus
5 S 10 i
46 B00 220 oo 70 20-30 40 50 60 70 80 90 10
Figure 3. Dropout Voltage versus Figure 4. Dropout Voltage versus Figure 5. Quiescent Current versus Figure 6. Quiescent Current versus Figure 7. Reset Output versus = Figure 8. Reset Thresholds versus
60 Regulator Output Voltage 3 a Junction Temperature
Multifunction Very Low Dropout Voltage Regulator TC4949 TYPICAL CHARACTERISTICS Figure 9. Sense Output versus Figure 10. Sense Thresholds versus
60 Sense Input Voltage 14 Junction Temperature
APPLICATION INFORMATION
‘ ages less than 8.0V supply transients of more than Supply Voltage Transient 0.4Viusec can cause areset signal perturbation. To improve : High supply voltage transients can cause aresetoutput _the transient behavior for supply voltages less than 8.0V a signal perturbation. For supply voltages greater than 8.0V _— capacitor at Pin 3 can be used. A capacitor at Pin 3 (C3 < the circuit shows a high immunity of the reset output against 1.0,F) reduces also the output noise. supply transients of more than 100V/usec. For supply volt- Vout &o ____wotn fete Fore r 1 = S| a] i feel, Q & 10K > Your aa. = 2 | & bd ~ | | | | | ~ | (2 Recurmended fo app bartun Ose Cos Oar Figure 11. Application Schematic
10 Preregulator
Figure 12. Foldbact Chars-tarietin af u—..—
Figure 15. The nominal reset delay time will be ted f ‘gure treu to the microprocessor like low voltage warnings.
Multifunction Very Low Dropout Voltage Regulator Tc4949 TAPING FORM Component Taping Orientation for 8-Pin SOIC (Narrow) User Direction of Feed User Direction of Feed PINT ii Hu W- Win . of Camer qj O a) 5) q 0 qj a q =) qj Oo qj O = qn q a) C a) PINT | P= Pitch ‘Standard Ree Component Orientation Reverse Reel Component Orientation for TR Sul™ix Device for RT Sul™ix Device Carrier Tape, Reel Size, and Number of Components Per Reel Pacrogs | corer wan [tn | PartPorrat et | fot Sun Pin SOIC [2mm | ammo 3 in PACKAGE DIMENSIONS 8-Pin SOIC (Narrow) PIN 1 indicated by dot and / or beveled edge a 080 (1.27) TYP. 197 (5.00) 189 (4.80) 069 (1.75) Ff | 053 (1.35) fl 1 .010 (0.25) maken \\ _| F007 (0.18) 013 (0.33) 004 (0.10 ne pan a Dimensions: inches(mm) Toes 1/8100 8
Multifunction Very Low Dropout Voltage Regulator TCc4949 PACKAGE DIMENSIONS (CONT.) 8-Pin PDIP (Narrow) PIN1 or i 240 (6.10) Me LL saze snoen 348 (8.84) [—| 200 (5.08) 150 (3.81 | _ L 110278) 022 (0.56) 310 (7.87) Dimensions: inches(mm) Sales Offices TelCom Semiconductor, Inc. TelCom Semiconductor, GmbH TelCom Semiconductor H.K. Ltd.
1200 Terra Bella Avenue Lochhamer Strasse 13 10 Sam Chuk Street, Ground Ficor
P.O. Box 7267 D-82152 Mertinsried San Po Kong, Kowicon Mountain View, CA 94039-7287 Germany Hong Kong TEL: 650-968-2241 TEL: (011) 49 89 895 6500 TEL: (01 1) 852-2350-7380 FAX: 650-967-1500 ewe tna ah an nm nae monn = FAX: (011) 852-2354-0057 E-Mail: liter@tekom-semi.con Tease 600 9