ADJUSTABLE HIGH PRECISION SHUNT REGULATOR GENERAL DESCRIPTION NJM373 / NJM373A / NJM376 is an adjustable high precision shunt regulator. The output voltage can be adjusted to any value between reference voltage and 4V by two extend resistors. PACKAGE OUTLINE NJM373F/AF NJM376F NJM373AU NJM376U FEATURES Operating Voltage to 3V High Precision Voltage Reference NJM373 NJM373A/76 Minimum Input Current 8µA typ. Adjustable Output Voltage Bipolar Technology Package Outline SOT-89 (3pin), MTP5.5V±%.5V±% BLOCK DIAGRAM PIN CONFIGURATION REFERENCE CATHODE NC 5 CATHODE NC 3 4 REFERENCE NJM373F/73AF NC NC 5 REFERENCE 3 4 CATHODE NJM376F REFERENCE CATHODE 3 NJM373AU CATHODE REFERENCE 3 NJM376U Ver.9--6 - -
ABSOLUTE MAXIMUM RATINGS (Ta=5 C) PARAMETER SYMBOL MAXIMUM RATINGS UNIT Cathode Voltage +4 V Continuous Cathode Current I K -3 ~ 5 ma Reference Input Current I REF - ~.5 ma Power Dissipation P D (SOT-89) 35 (MTP5) mw Operating Temperature Range T OPR -4 ~ +85 C Storage Temperature Range T STG -4 ~ +5 C RECOMMENDED OPERATING CONDITIONS (Ta=5 C) PARAMETER SYMBOL MIN. TYP. MAX. UNIT Cathode Voltage 3 V Cathode Current I K.5 3 ma ELECTRICAL CHARACTERISTICS (I K =ma, Ta=5 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Reference Voltage = NJM373A (*) 5 5 75 = NJM373A/ NJM376 (*) 37 5 63 mv Reference Voltage V 5V (*) ±.7 mv/v Change vs. Cathode REF / V Voltage Change KA 5V 3V (*) ±. mv/v Reference Input Current I REF = R=kΩ, R= (*). 4. µa Minimum Input Current I MIN =, =±% (*) 8 5 µa Cathode Current (Off Cond.) Dynamic Impedance I OFF =3V, =V (*3).. µa Z KA =, f khz.5ma I K 3mA (*). Ω TEMPERATURE CHARACTERISTICS (I K =ma, Ta= -4 C ~ 85 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Reference Voltage = (*) ± mv Change Reference Input Current Change I REF = R=kΩ, R= (*).5 µa Reference voltage includes error. (*): Test Circuit (Fig.) (*): Test Circuit (Fig.) (*3): Test Circuit (Fig.3) - - Ver.9--6
TEST CIRCUIT INPUT INPUT I K R I REF I K R Fig. = to test circuit Fig. > to test circuit V O = =V R REF VO = VKA = VREF + + IREF R R INPUT I OFF I K =ma kω 47uF kω Fig.3 I OFF to test circuit Fig.4 Gain and Phase to test circuit POWER DISSIPATION VS. AMBIENT TEMPERATURE 5 Power Dissipation P D (mw) 4 3 SOT-89 MTP5 5 5 75 Ver.9--6-3 -
TYPICAL CHARACTERISTICS Reference Voltage (mv) 6 55 5 45 4 Reference Voltage vs. Cathode Current ( =,Ta=5 C) 3 Cathode Current I K (ma) Reference Voltage (mv) 4 8 6 Reference Voltage vs. Cathode Current ( =,Ta=5 C) 4 6 8 Cathode Current I K (ua) Reference Voltage Change vs. Cathode Voltage (I K =ma,r=variable,r=kω,ta=5 C) 4 Cathode Current (Off Cond.) vs. Cathode Voltage ( =V,Ta=5 C) Reference Voltage Change (mv) 3 Cathode Current I OFF (na).8.6.4. 5 5 Cathode Voltage (V) 5 5 Cathode Voltage (V) Dynamic Impedance Z KA (Ω)..8.6.4. Dynamic Impedance (I K =.5~3mA, =,Ta=5 C) k k k Cathode Current Frequency f (Hz) Voltage Gain A V (db) 8 6 4 - -4-6 Voltage Gain Phase vs. Frequency (Fig.4 Test Circuit,Ta=5 C) 36 7 8-9 -8-7 -8-36 k k k M M Frequency f (Hz) 9 Phase Φ (deg) - 4 - Ver.9--6
TYPICAL CHARACTERISTICS Cathode Current I K (µa) 8 6 4 Safety Operating Boundary Condition (Rin=kΩ, V =V, Ta=5 o C) KA REF Ceramic Capacitor Stable Operaion Unstable Operaion.. Output Capacitor C OUT (µf) V + Safety Operating Boundary Condition Test Circuit Rin=kΩ Note) Oscillation might occur while operating within the range of safety curve. So that, it is necessary to make ample margins by taking considerations of fluctuation of the device. I K C OUT Cathode Current I K (µa) 8 6 4 Safety Operating Boundary Condition (Rin=kΩ, V =V, Ta=5 o C) KA REF Aluminum Electrolytic Capacitor Stable Operaion Unstable Operaion. Output Capacitor C OUT (µf) Ver.9--6-5 -
TYPICAL CHARACTERISTICS Reference Voltage (mv) 6 55 5 45 4 Reference Voltage vs. Temperature (I K =ma, = ) -5-5 5 5 75 5 5 Reference Input Current I REF (ua) 3.5.5 Reference Input Current vs. Temperature (I K =ma,r=kω,r= ) -5-5 5 5 75 5 5 Cathode Current (Off Cond.) vs. Temperature ( =3V, =V) 4 Output Noise Voltage vs. Temperature (I K =ma, = ) Cathode Current I OFF (ua).8.6.4. -5-5 5 5 75 5 5 Ambient emperature Ta ( C) Output Noise Voltage V NO (uvrms) 8 6 4-5 -5 5 5 75 5 5-6 - Ver.9--6
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.9--6-7 -