PRODUCTION DATA SHEET

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Annice Barber
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1 The TL4/TL4A/TL4B series precision adjustable three terminal shunt voltage regulators are pin-to-pin compatible with the industry standard TL4. The output voltage of this reference is programmable by using two external resistors from.5 to 6. These devices offer low output impedance for improved load DESCRIPTION regulation. The typical output impedance of these devices is mω. These devices find application in the feedback path of switching power supplies, OP crowbar circuits, reference for A/D, D/A, and as zener diodes with improved turn-on characteristics. IMPORTANT: For the most current data, consult MICROSEMI s website: T A ( C) to 7 IN -4 to 85 & TL4B PRODUCT HIGHLIGHT Precision Programmable References R R OUT KEY FEATURES INITIAL OLTAGE REFERENCE ACCURACY OF.4% (TL4B) SINK CURRENT CAPABILITY ma to ma TYPICAL OUTPUT DYNAMIC IMPEDANCE LESS THAN mω; TYPICAL OUTPUT IMPEDANCE OF THE TL4B LESS THAN mω ADJUSTABLE OUTPUT OLTAGE FROM.5 TO 6 AAILABLE IN SURFACE-MOUNT PACKAGES LOW OUTPUT NOISE TYPICAL EQUIALENT FULL RANGE TEMPERATURE COEFFICIENT OF ppm/ C DIRECT PIN-TO-PIN REPLACEMENT FOR INDUSTRY STANDARD TL4 AND TL4 R O= + R PACKAGE ORDER INFO Plastic SOIC Plastic TO-9 Plastic TO-89 Initial DM 8-Pin LP -Pin PK - Pin Tolerance RoHS Compliant / Pb-free RoHS Compliant / Pb-free RoHS Compliant / Pb-free Transition DC: 44 Transition DC: 59 Transition DC: 58 % TL4CDM TL4CLP TL4CPK % TL4ACDM TL4ACLP TL4ACPK.4% TL4BCDM TL4BCLP TL4BCPK % TL4IDM TL4ILP TL4IPK % TL4AIDM TL4AILP TL4AIPK.4% TL4BIDM TL4BILP TL46BIPK Note: All surface mount packages are available in Tape & Reel. Append the letters TR to the part number. (i.e. LTL4AIDM-TR). The TO-9 (LP) package is available in ammo-pack. REF TL4X Page

2 ABSOLUTE MAXIMUM RATINGS PACKAGE PIN OUT Cathode to Anode oltage (KA)(Note ) to 7 Reference Input Current (IREF)... -5µA to ma Continuous Cathode Current (IK)... -ma to 5mA Operating Junction Temperature... 5 C Storage Temperature Range C to 5 C Package Peak Temp. for Solder Reflow (4 seconds maximum exposure)... 6 C (+ -5) Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal. Note. oltage values are with respect to the anode terminal unless otherwise noted. DM Plastic SOIC 8-Pin THERMAL DATA THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA PK Plastic TO-89 -Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA LP Plastic TO-9 -Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ JA 65 C/W 7 C/W 56 C/W Junction Temperature Calculation: T J = T A + (P D x θ JA ). The θ JA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. Ref (R) BLOCK DIAGRAM REF Cathode (K) Anode (A) Cathode N.C. Anode N.C.. Cathode. Anode. Ref LP PACKAGE (Top iew) DM PACKAGE (Top iew) PK PACKAGE (Top iew) Cathode Anode Ref Ref Anode Anode N.C. RoHS / Pb-free % Matte Tin Lead Finish PACKAGE DATA Page

3 ELECTRICAL CHARACTERISTICS Unless otherwise specified, these specifications apply over the operating ambient temperature for the TL4C/TL4AC/TL4BC with C < T A < 7 C, and TL4I/TL4AI/TL4BI with -4 C < T A < 85 C Parameter Symbol Test Conditions /B Min Typ Max Units TL4 = ma, KA = REF, T A = 5 C Reference Input TL4A = ma, KA = REF, T A = 5 C oltage REF TL4B = ma, KA = REF, T A = 5 C m TL4C = ma, KA = REF 4 7 TL4I = ma, KA = REF 5 TL4AC ΔREF = ma, KA = REF 4 7 Reference Drift m TL4AI = ma, KA = REF 5 ΔKA TL4BC = ma, KA = REF 4 5 TL4BI = ma, KA = REF 5 TL4, oltage Ratio, Ref to I TL4A K = ma, KA =.5 to Cathode (Note 4) TL4B = ma, KA =.5 to m/ TL4, Reference Input TL4A KA = REF, T A = 5 C 4 I Current REF TL4B KA = REF, T A = 5 C.5.9 µa Minimum Operating Current I MIN KA = REF to 6.4 ma TL4 KA = REF to 6, T A = 5 C. Off-State Cathode TL4A KA = REF to 6, T A = 5 C. I Current OFF µa KA = REF to 6, T A = Operating Range TL4B KA = 6, REF =, T A = 5 C.8.5 Dynamic Impedance TL4 I Z KA I KA = REF, = ma to ma, f < khz, T A = 5 C..5 TL4B KA = REF, = ma to ma, f < khz, T A = 5 C.. Ω Note : These parameters are guaranteed by design. Note 4: Δ Δ REF KA Ratio of change in reference input voltage to the change in cathode voltage. ELECTRICALS Page

4 GRAPH / CURE INDEX Characteristic Curves Figure #. Reference Input oltage vs. Free-Air Temperature. Reference INput Current vs. Free-Air Temperature. Cathode Current vs. Cathode oltage 4. Cathode Current vs. Cathode oltage 5. Off-State Cathode Current vs. Free-Air Temperature 6. Ratio of Delta Reference oltage to Delta Cathode oltage vs. Free-Air Temperature 7. Equivalent Input Noise oltage vs. Frequency FIGURE INDEX Parameter Measurement Information Figure # 8. Test Circuit For KA = REF 9. Test Circuit For KA > REF. Test Circuit for I OFF Typical Characteristics Figure #. Equivalent Input Noise oltage Over a -Second Period. Small-Signal oltage Amplification vs. Frequency. Reference Impedance vs. Frequency 4. Pulse Response 5. Stability Boundary Conditions Application Information Figure # 6. Shunt Regulator 7. Single-Supply Comparator with Temperature- Compensated Threshold 8. High Current Shunt Regulator 9. Crowbar Circuit. oltage Monitor. Precision Constant-Current Sink CHARTS Page 4

5 ( REF ) Reference Input oltage - () ( ) Cathode Current - (µa) REF = KA = ma TL4B (T A ) Ambient Temperature - ( C) CHARACTERISTIC CURES REF = 55m REF = 495m REF = 44m Figure Reference oltage vs. Free-Air Temperature KA = REF T A = 5 C TL4B ( KA ) Cathode oltage - () Figure Cathode Current vs. Cathode oltage (I REF ) Reference Input Current - (µa) ( ) Cathode Current - (µa) 5 4 = ma R = = ma TL4B (T A ) Ambient Temperature - ( C) Figure Reference Current vs. Free-Air Temperature KA = REF T A = 5 C I MIN - - ( KA ) Cathode oltage - () Figure 4 Cathode Current vs. Cathode oltage CHARTS Page 5

6 (I OFF ) Off-State Cathode Current - (µa) KA = 6 REF = (T A ) Ambient Temperature - ( C) Figure 5 Off-State Cathode Current vs Free-Air Temperature (N) Noise oltage - (n/ Hz) CHARACTERISTIC CURES -.85 & TL4B I O = ma T A = 5 C k k k (f) Frequency - (Hz) Figure 7 Equivalent Input Noise oltage vs. Frequency REF / KA - (m/) (T A ) Ambient Temperature - ( C) Figure 6 Ratio of Delta Reference oltage to Delta Cathode oltage vs. Free-Air Temperature KA = to 6 CHARTS Page 6

7 PARAMETER MEASUREMENT INFORMATION Input Input REF KA Input Figure 8 Test Circuit for KA = REF Figure 9 Test Circuit for KA > REF KA I OFF Figure Test Circuit for I OFF REF R R I REF KA APPLICATIONS Page 7

8 TYPICAL CHARACTERISTICS 5µF 9. k 9 ( N ) Input Noise oltage - (µ) f =. to Hz = ma T A = 5 C (t) Time - (s) Figure Equivalent Input Noise oltage over a Second Period µf & TL4B (DUT) 8 6.µF 6K CC EE TLE7 A = /m 6k 6k µf µf k k Test Circuit for.hz to Hz Equivalent Input Noise oltage CC EE TLE7 A = / M.µF CRO APPLICATIONS Page 8

9 (A Y ) oltage Amplification - (db) (Iz KA I) Reference Impedance k k k M M (f) Fre quency - (Hz) Figure Reference Impedance vs. Frequency. k = ma to ma T A = 5 C TYPICAL CHARACTERISTICS = ma T A = 5 C k k M M (f) Frequency - (Hz) Figure Reference Impedance vs. Frequency 9µF 5k 8.5k Test Circuit for oltage Amplification 5 k Test Circuit for Reference Impedance Output GND Output GND CHARTS Page 9

10 IN - () ( KA ) Output oltage - () ( ) Cathode Current - ma (t) Time - (µs) Figure 4 Pulse Response A KA = REF B KA = 5 C KA = D KA = 5 Stable A* B*... C* TYPICAL CHARACTERISTICS 6 Pulse Generator f = khz D* (C L ) Load Capacitance - (µf) Figure 5 Stability Boundary Conditions = ma T A = 5 C Stable *The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R and + were adjusted to establish the initial KA and conditions with C L =. and C L were then adjusted to determine the ranges of stability. C L C L 5 Test Circuit for Pulse Response R=k R Test Circuit for Curve A 5 Test Circuit for Curve B, C, D 5 Output GND CHARTS Page

11 R (see Note) REF R.% R.% = APPLICATION INFORMATION O & TL4B R O + REF R Figure 6 Shunt Regulator Note: R should provide > ma cathode current to the & TL4 at minimum R R = & TL4B R O + REF R Figure 8 High Current Shunt Regulator RA RA & TL4B Low Limit = RB R4 (Note) O R (see Note) Input & TL4B ON OFF BA T GND Figure 7 Single-Supply Comparator with Temperature- Compensated Threshold RB + RB RB High Limit = + REF RB LED on when Low Limit < < High Limit Figure oltage Monitor Note: R and R4 are selected to provide the desired LED intensity and > ma cathode current to the & TL4B at the available + REF R R & TL4B O C (see Note) Figure 9 Crowbar Circuit Note: Refer to the stability boundary conditions in Figure 5 to determine allowable values for C. & TL4B R S.% Figure Precision Contact Current Sink I O O APPLICATIONS Page

V OUT. PACKAGE ORDER INFORMATION Initial. DM Plastic SOIC LP Plastic TO-92 3-pin

V OUT. PACKAGE ORDER INFORMATION Initial. DM Plastic SOIC LP Plastic TO-92 3-pin T HE I N F I N I T E P OWER OF I NNOVATION DESCRIPTION KEY FEATURES The series precision adjustable three terminal shunt voltage regulators are pin-to-pin compatible with the industry standard TL431. The