LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES

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1 Description The is a family of bandgap circuits designed to achieve precision micro-power voltage references of.5v, 3.V and 5.V. The devices are available in.% B-grade,.5% C-grade and % D-grade initial tolerances. They are available in small outline SOT3 and SC7-5 surface mount packages which are ideal for applications where space is at a premium. Excellent performance is maintained over the 6µA to 5mA operating current range with a typical temperature coefficient of only ppm/ C. The device has been designed to be highly tolerant of capacitive loads so maintaining excellent stability. This device offers a pin for pin compatible alternative to the voltage reference. Features Small packages: SOT3 & SC7-5 No output capacitor required Output voltage tolerance o B ±.% at 5 C o C ±.5% at 5 C o D ±% at 5 C Low output noise Pin Assignments Cathode Anode Top view * Pin must be left floating or connected to pin Anode * Cathode F (SOT3) 3 H5 (SC7-5) 3 * N/C N/C Top View * Pin must be left floating or connected to pin 5 (Hz to khz)... 5µV RMS Wide operating current range 6µA to 5mA Extended temperature range - C to +5 C Low temperature coefficient ppm/ C (max) All parts AEC-Q Grade qualified Applications Battery powered equipment Precision power supplies Portable instrumentation Portable communications devices Notebook and palmtop computers Data acquisition systems of

2 Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated) Parameter Rating Unit Continuous Reverse Current ma Continuous Forward Current ma Operating Junction Temperature - to +5 C Storage Temperature -55 to +5 C Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum rating, for extended periods, may reduce device reliability. Unless otherwise stated voltages specified are relative to the ANODE pin. Package Thermal Data Package θ JA P DIS T AMB = 5 C, T J = 5 C SOT3 38 C/W 33mW SC C/W 33mW Recommended Operating Conditions Min. Max. Units Reverse Current.6 5 ma Operating Ambient Temperature Range - 5 C of

3 Electrical Characteristics (Test conditions: T AMB = 5 C, unless otherwise specified.) -.5 Symbol V REF I RMIN ΔV R /ΔT ΔV R /ΔI R Z R e n Parameter voltage voltage tolerance Minimum operating current Average reverse breakdown voltage temperature coefficient change with current Dynamic output impedance Noise voltage Conditions T AMB Typ. B Limits C Limits D Limits I R = µa 5 C.5 V Units 5 C ±5 ± ±5 I R = µa - to +85 C ± ±9 ±9 mv - to +5 C ±3 ±38 ±63 5 C to +85 C µa - to +5 C I R = ma ± I R = ma - to +5 C ±5 ± ± ±5 ppm/ C I R = µa ±5 5 C I RMIN I R - to +85 C... < ma - to +5 C... 5 C ma < I R - to +85 C < 5mA - to +5 C mv I R = ma, f = Hz I AC =.I R Ω I R = µa Hz < f < khz 35 µv RMS V R Long term stability (non cumulative) t = Hrs, I R = µa ppm V HYST Themal hysteresis ΔT = - C to =5 C.8 % 3 of

4 Electrical Characteristics (cont.) (Test conditions: T AMB = 5 C, unless otherwise specified.) -3. Symbol V REF I RMIN ΔV R /ΔT ΔV R /ΔI R Z R e n Parameter voltage voltage tolerance Minimum operating current Average reverse breakdown voltage temperature coefficient change with current Dynamic output impedance Noise voltage Conditions T AMB Typ. B Limits C Limits D Limits I R = µa 5 C 3. V Units 5 C ±6 ±5 ±3 I R = µa - to +85 C ±6 ±3 ±59 mv - to +5 C TBD ±5 ±75 5 C to +85 C µa - to +5 C I R = ma ± I R = ma - to +5 C ±5 ± ± ±5 ppm/ C I R = µa ±5 5 C I RMIN I R - to +85 C..3 < ma - to +5 C C ma < I R - to +85 C < 5mA - to +5 C mv I R = ma, f = Hz I AC =.I R Ω I R = µa Hz < f < khz 35 µv RMS V R Long term stability (non cumulative) t = Hrs, I R = µa ppm V HYST Themal hysteresis ΔT = - C to = 5 C.8 % of

5 Electrical Characteristics (cont.) (Test conditions: T AMB = 5 C, unless otherwise specified.) -5. Symbol V REF I RMIN ΔV R /ΔT ΔV R /ΔI R Z R e n Parameter voltage voltage tolerance Minimum operating current Average reverse breakdown voltage temperature coefficient change with current Dynamic output impedance Noise voltage Conditions T AMB Typ. B Limits C Limits D Limits I R = µa 5 C 5. V Units 5 C ± ±5 ±5 I R = µa - to +85 C ±3 ±58 ±99 mv - to +5 C ±6 ±75 ±5 5 C to +85 C µa - to +5 C I R = ma ±3 I R = ma - to +5 C ± ± ± ±5 ppm/ C I R = µa ± 5 C I RMIN I R - to +85 C...8 < ma - to +5 C C ma < I R - to +85 C.. 5. < 5mA - to +5 C.. 5. mv I R = ma, f = Hz I AC =.I R Ω I R = µa Hz < f < khz 8 µv RMS V R Long term stability (non cumulative) t = Hrs, I R = µa ppm V HYST Themal hysteresis ΔT = - C to =5 C.8 % 5 of

6 Typical Characteristics ΔV REF (%) I = µa R ΔV REF (%) I = ma R TEMPERATURE ( C) Reference Voltage Temperature Coefficient T A = 5 C I R = µa C L =.µf Tantalum C = L Z R, REFERENCE IMPEDANCE ( Ω ) TEMPERATURE ( C) Reference Voltage Temperature Coefficient T A = 5 C I R = ma. C L =.µf Tantalum C = L k 5 k k M Reference Impedance vs. Frequency. k k k M Reference Impedance vs. Frequency 5 NOISE (nv/ Hz) T A = 5 C I R = µa 3-3 Noise Voltage vs. Frequency I R, REVERSE CURRENT (µa) T = 5 C A -3-3 V R, REVERSE VOLTAGE (V) Reference Current vs. Voltage 6 of

7 Typical Characteristics ΔV REF (%) I = µa R ΔV REF (%) TEMPERATURE ( C) Reference Voltage Temperature Coefficient T A = 5 C I R = µa C L =.µf Tantalum C = L Z R, REFERENCE IMPEDANCE ( Ω ) TEMPERATURE ( C) Reference Voltage Temperature Coefficient. NOISE (nv/ Hz) k k k M Reference Impedance vs. Frequency I R, REVERSE CURRENT (µa). k k k M Reference Impedance vs. Frequency T = 5 C A k k k Noise Voltage vs. Frequency 7 of V R, REVERSE VOLTAGE (V) Reference Current vs. Voltage

8 Typical Characteristics ΔV REF (%) ΔV REF (%) I = ma R TEMPERATURE ( C) Reference Voltage Temperature Coefficient TEMPERATURE ( C) Reference Voltage Temperature Coefficient Z R, REFERENCE IMPEDANCE ( Ω ) NOISE (nv/ Hz) 8 6 k k k M Reference Impedance vs. Frequency k k k Noise Voltage vs. Frequency I R, REVERSE CURRENT (µa). k k k M Reference Impedance vs. Frequency T = 5 C A V R, REVERSE VOLTAGE (V) Reference Current vs. Voltage 8 of

9 Start Up Characteristics -.5, 3. and 5. INPUT & OUTPUT VOLTAGE (V) INPUT & OUTPUT VOLTAGE (V) Input Output T A = 5 C R S = 3k µ µ µ 6µ 8µ µ TIME (s) Long Pulse Response µ µ µ 6µ 8µ µ TIME (s) Short Pulse Response INPUT & OUTPUT VOLTAGE (V) INPUT & OUTPUT VOLTAGE (V) µ µ µ 6µ 8µ µ TIME (s) Long Pulse Response µ µ µ 6µ 8µ µ TIME (s) Short Pulse Response -5. INPUT & OUTPUT VOLTAGE (V) 8 6 INPUT & OUTPUT VOLTAGE (V) 8 6 µ µ µ 6µ 8µ µ TIME (s) Long Pulse Response µ µ µ 6µ 8µ µ TIME (s) Short Pulse Response 9 of

10 Application Information In a conventional shunt regulator application (Figure ), an external series resistor (R S ) is connected between the supply voltage, V S, and the. R S V S I R + I L I L R S determines the current that flows through the load (I L ) and the (I R ). Since load current and supply voltage may vary, R S should be small enough to supply at least the minimum acceptable I R to the even when the supply voltage is at its minimum and the load current is at its maximum value. When the supply voltage is at its maximum and I L is at its minimum, R S should be large enough so that the current flowing through the is less than 5 ma. R S is determined by the supply voltage, (V S ), the load and operating current, (I L and I R ), and the s reverse breakdown voltage, V R. I R V R RS = VS VR IL + IR Printed circuit board layout considerations s in the SOT3 package have the die attached to pin, which results in an electrical contact between pin and pin 3. Therefore, pin of the SOT-3 package must be left floating or connected to pin. s in the SC7-5 package have the die attached to pin, which results in an electrical contact between pin and pin. Therefore, pin must be left floating or connected to pin. Ordering Information 5 C Tol.%.5% % Voltage (V) Order Code Qualification Package Part Mark Reel Size Tape Width Quantity per Reel B5FTA Commercial SOT3 RB 7, 8mm 8mm 3 B5H5TA Commercial SC7-5 RB 7, 8mm 8mm 3 B3FTA Commercial SOT3 R3B 7, 8mm 8mm 3 B3H5TA Commercial SC7-5 R3B 7, 8mm 8mm 3 B5FTA Commercial SOT3 R5B 7, 8mm 8mm 3 B5H5TA Commercial SC7-5 R5B 7, 8mm 8mm 3 C5FTA Commercial SOT3 RC 7, 8mm 8mm 3 C5H5TA Commercial SC7-5 RC 7, 8mm 8mm 3 C3FTA Commercial SOT3 R3C 7, 8mm 8mm 3 C3H5TA Commercial SC7-5 R3C 7, 8mm 8mm 3 C5FTA Commercial SOT3 R5C 7, 8mm 8mm 3 C5QFTA Automotive SOT3 R5C 7, 8mm 8mm 3 C5H5TA Commercial SC7-5 R5C 7, 8mm 8mm 3 D5FTA Commercial SOT3 RD 7, 8mm 8mm 3 D5H5TA Commercial SC7-5 RD 7, 8mm 8mm 3 D3FTA Commercial SOT3 R3D 7, 8mm 8mm 3 D3H5TA Commercial SC7-5 R3D 7, 8mm 8mm 3 D5FTA Commercial SOT3 R5D 7, 8mm 8mm 3 D5H5TA Commercial SC7-5 R5D 7, 8mm 8mm 3 of

11 Package Outline Dimensions SOT3 E e b 3leads e L E D A A L c Dim. Millimeters Inches Millimeters Inches Dim. Min Max Min Max Min Max Min Max A e.9 NOM.75 NOM A.... E b E c L D L e.95 NOM.37 NOM Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches SC7-5 Dim. Millimeters Inches Millimeters Inches Dim. Min Max Min Max Min Max Min Max A E. BSC.86 BSC A E.5 BSC.9 BSC A e.65 BSC.55 BSC b e.3 BSC.5 BSC C L D. BSC.787 BSC a 8 8 Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches of

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