NJM2373/73A/76 ADJUSTABLE HIGH PRECISION SHUNT REGULATOR ■GENERAL DESCRIPTION ■PACKAGE OUTLINE NJM2373 / NJM2373A / NJM2376 is an adjustable high precision shunt regulator. The output voltage can be adjusted to any value between reference voltage and 14V by two extend resistors. NJM2373F/AF NJM2373AU NJM2376F NJM2376U ■FEATURES ● Operating Voltage V to 13V REF ● High Precision Voltage Reference NJM2373 1.25V±2% NJM2373A/76 1.25V±1% ● Minimum Input Current 80µA typ. ● Adjustable Output Voltage ● Bipolar Technology ● Package Outline SOT-89 (3pin), MTP5 ■BLOCK DIAGRAM ■PIN CONFIGURATION CATHODE NC 1 5 CATHODE ANODE 2 NC 3 4 REFERENCE NJM2373F/73AF REFERENCE NC 1 5 REFERENCE ANODE 2 VREF NC 3 4 CATHODE NJM2376F REFERENCE 1 ANODE ANODE 2 CATHODE 3 NJM2373AU CATHODE 1 ANODE 2 REFERENCE 3 NJM2376U Ver.2009-11-26 -1-

NJM2373/73A/76 ■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL MAXIMUM RATINGS UNIT Cathode Voltage V +14 V KA Continuous Cathode Current I -30 ~ 50 mA K Reference Input Current I -10 ~ 0.05 mA REF (SOT-89) 350 Power Dissipation P mW D (MTP5) 200 Operating Temperature Range T -40 ~ +85 °C OPR Storage Temperature Range T -40 ~ +150 °C STG ■RECOMMENDED OPERATING CONDITIONS (Ta=25°C) PARAMETER SYMBOL MIN. TYP. MAX. UNIT Cathode Voltage V V – 13 V KA REF Cathode Current I 0.5 – 30 mA K ■ELECTRICAL CHARACTERISTICS (I =1mA, Ta=25°C) K PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT V =V KA REF (*1) 1225 1250 1275 NJM2373A Reference Voltage V mV REF V =V KA REF (*1) 1237 1250 1263 NJM2373A/ NJM2376 Reference Voltage ⎮V ⎮≤ V ≤ 5V (*2) – – ±2.7 mV/V ∆V / REF KA Change vs. Cathode REF Voltage Change ∆VKA 5V ≤ VKA ≤ 13V (*2) – – ±2.0 mV/V V =V Reference Input Current I KA REF (*2) – 2.0 4.0 µA REF R1=10kΩ, R2=∞ Minimum Input Current I V =V , ∆V =±1% (*1) – 80 500 µA MIN KA REF REF Cathode Current I V =13V, V =0V (*3) – 0.01 1.0 µA (Off Cond.) OFF KA REF V = V , f≤1kHz Dynamic Impedance ⎮Z ⎮ KA REF (*1) – 0.12 – Ω KA 0.5mA ≤ I ≤ 30mA K ■TEMPERATURE CHARACTERISTICS (I =1mA, Ta= -40°C ~ 85°C) K PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Reference Voltage ∆V V =V (*1) – ±10 – mV Change REF KA REF Reference Input Current V =V ∆I KA REF (*2) – 0.5 – µA Change REF R1=10kΩ, R2=∞ ⎮V ⎮···Reference voltage includes error. REF (*1): Test Circuit (Fig.1) (*2): Test Circuit (Fig.2) (*3): Test Circuit (Fig.3) -2- Ver.2009-11-26

NJM2373/73A/76 ■TEST CIRCUIT INPUT VKA INPUT VKA IK IK R1 I REF VREF R2 VREF Fig.1 V =V to test circuit Fig.2 V >V to test circuit KA REF KA REF ⎛ R1⎞ VO=VKA=VREF VO=VKA =VREF⎜1+ ⎟+IREF×R1 ⎝ R2⎠ INPUT V KA I 10kΩ OFF IK=1mA 470uF 10kΩ Fig.3 I to test circuit Fig.4 Gain and Phase to test circuit OFF ■POWER DISSIPATION VS. AMBIENT TEMPERATURE 500 ) W m 400 SOT-89 ( D P n 300 o ati MTP5 p si 200 s Di r e w 100 o P 0 0 25 50 75 100 Ambient Temperature Ta (°C) Ver.2009-11-26 -3-

NJM2373/73A/76 ■TYPICAL CHARACTERISTICS Reference Voltage vs. Cathode Current Reference Voltage vs. Cathode Current (V =V ,Ta=25°C) (V =V ,Ta=25°C) KA REF KA REF 1260 1400 V) V) m m V ( REF1255 V (REF1200 e e g g a 1250 a 1000 olt olt V V e e c c n 1245 n 800 e e r r e e ef ef R R 1240 600 0 10 20 30 0 20 40 60 80 100 Cathode Current I (mA) Cathode Current I (uA) K K Reference Voltage Change vs. Cathode Voltage Cathode Current (Off Cond.) vs. Cathode Voltage (I =1mA,R1=Variable,R2=10kΩ,Ta=25°C) (V =0V,Ta=25°C) K REF 4 1 e ) g A an (n 0.8 age Ch(mV) 3 nt I OFF 0.6 Volt EF2 rre e VR Cu 0.4 nc ∆ e e 1 d r o e h 0.2 ef at R C 0 0 0 5 10 15 0 5 10 15 Cathode Voltage V (V) Cathode Voltage V (V) KA KA Dynamic Impedance Voltage Gain · Phase vs. Frequency (IK=0.5~30mA,VKA=VREF,Ta=25°C) (Fig.4 Test Circuit,Ta=25°C) 1.2 80 360 ) Ω ( 60 270 | A 1 ) K B 40 Gain 180 Z d ) e | 0.8 (V 20 90 deg c A ( an 0.6 n 0 0 Φ ped Gai -20 -90 se m 0.4 e a c I ag -40 Phase -180 Ph ami 0.2 Volt -60 -270 n y D 0 -80 -360 1 10 100 1k 10k 100k 100 1k 10k 100k 1M 10M Cathode Current Frequency f (Hz) Frequency f (Hz) -4- Ver.2009-11-26

NJM2373/73A/76 ■TYPICAL CHARACTERISTICS Safety Operating Boundary Condition Safety Operating Boundary Condition (Rin=1kΩ, V =V , Ta=25oC) Test Circuit KA REF 1000 Rin=1kΩ Ceramic Capacitor V ) KA A (µ800 Stable Operaion IK I K Region ent 600 V+ COUT r ur C400 e d o Unstable Operaion h at200 Region C Note) Oscillation might occur while operating within the range of safety curve. 0 So that, it is necessary to make ample margins by taking 0.01 0.1 1 10 considerations of fluctuation of the device. Output Capacitor C (µF) OUT Safety Operating Boundary Condition (Rin=1kΩ, V =V , Ta=25oC) 1000 KA REF Aluminum Electrolytic Capacitor ) A µ800 ( K ent I600 StabRlee Ogipoenraion r r u C400 e od Unstable Operaion h at200 Region C 0 0.1 1 10 Output Capacitor C (µF) OUT Ver.2009-11-26 -5-

NJM2373/73A/76 ■TYPICAL CHARACTERISTICS Reference Voltage vs. Temperature Reference Input Current vs. Temperature (I =1mA,V =V ) (I =1mA,R1=10kΩ,R2= ) K KA REF K ) 1260 A) 3 V u m ( age V ( REF 11225505 urrent I REF 2.5 Volt ut C e np 2 erenc 1245 nce I ef re R 1240 efe -50 -25 0 25 50 75 100 125 150 R 1.5 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) Ambient Temperature Ta (°C) Cathode Current (Off Cond.) vs. Temperature Output Noise Voltage vs. Temperature (V =13V,V =0V) (I =1mA,V =V ) KA REF K KA REF 1 140 ) A 120 (u 0.8 ge OFF oltas)100 e Current I 00..46 put Noise V (uVrmVNO 468000 od ut h 0.2 O at 20 C 0 0 -50 -25 0 25 50 75 100 125 150 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) Ambient emperature Ta (°C) -6- Ver.2009-11-26

NJM2373/73A/76 MEMO [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Ver.2009-11-26 -7-