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. ■FEATURES ● Operating Voltage VREF to 13V ● High Precision Voltage Reference NJM2373 NJM2373A/76 ● Minimum Input Current 80µA typ. ● Adjustable Output Voltage ● Bipolar Technology ● Package Outline SOT-89 (3pin), MTP5 ■BLOCK DIAGRAM NJM2373F/AF NJM2376F NJM2373AU NJM2376U 1.25V±2% 1.25V±1% ■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 ANODE REFERENCE 1 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 Cathode Voltage VKA Continuous Cathode Current IK Reference Input Current IREF Power Dissipation PD Operating Temperature Range Storage Temperature Range TOPR TSTG MAXIMUM RATINGS +14 -30 ~ 50 -10 ~ 0.05 (SOT-89) 350 (MTP5) 200 -40 ~ +85 -40 ~ +150 ■RECOMMENDED OPERATING CONDITIONS (Ta=25°C) PARAMETER SYMBOL MIN. TYP. Cathode Voltage VKA VREF – Cathode Current IK 0.5 – UNIT V mA mA mW °C °C MAX. 13 30 UNIT V mA ■ELECTRICAL CHARACTERISTICS (IK=1mA, Ta=25°C) PARAMETER Reference Voltage Reference Voltage Change vs. Cathode Voltage Change SYMBOL VREF ∆VREF/ ∆VKA VKA=VREF NJM2373A VKA=VREF NJM2373A/ NJM2376 ⎮VREF⎮≤ VKA ≤ 5V 5V ≤ VKA ≤ 13V MIN. TYP. MAX. (*1) 1225 1250 1275 (*1) 1237 1250 1263 (*2) – – ±2.7 mV/V (*2) – – ±2.0 mV/V mV (*2) – 2.0 4.0 µA IMIN (*1) – 80 500 µA IOFF VKA=13V, VREF=0V (*3) – 0.01 1.0 µA ⎮ZKA⎮ VKA= VREF, f≤1kHz 0.5mA ≤ IK ≤ 30mA (*1) – 0.12 – Ω MIN. TYP. MAX. UNIT IREF Minimum Input Current Cathode Current (Off Cond.) ■TEMPERATURE CHARACTERISTICS (IK=1mA, Ta= -40°C ~ 85°C) PARAMETER SYMBOL TEST CONDITION Reference Voltage Change Reference Input Current Change UNIT VKA=VREF R1=10kΩ, R2=∞ VKA=VREF, ∆VREF=±1% Reference Input Current Dynamic Impedance TEST CONDITION ∆VREF VKA=VREF (*1) – ±10 – mV ∆IREF VKA=VREF R1=10kΩ, R2=∞ (*2) – 0.5 – µA ⎮VREF⎮···Reference voltage includes error. (*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 R1 R2 VREF Fig.1 VKA=VREF to test circuit VREF Fig.2 VKA>VREF to test circuit ⎛ R1 ⎞ VO = VKA = VREF⎜1 + ⎟ + IREF × R1 ⎝ R2 ⎠ VO=VKA=VREF INPUT IK IREF VKA IOFF IK=1mA 10kΩ 470uF 10kΩ Fig.3 IOFF to test circuit Fig.4 Gain and Phase to test circuit ■POWER DISSIPATION VS. AMBIENT TEMPERATURE Power Dissipation PD (mW) 500 400 SOT-89 300 MTP5 200 100 0 0 Ver.2009-11-26 25 50 75 Ambient Temperature Ta (°C) 100 -3- NJM2373/73A/76 Reference Voltage vs. Cathode Current (VKA=VREF,Ta=25°C) 1260 Reference Voltage VREF (mV) 1255 1250 1245 1240 0 10 20 Reference Voltage vs. Cathode Current (VKA=VREF,Ta=25°C) 1400 1200 1000 800 600 0 30 20 80 100 Cathode Current (Off Cond.) vs. Cathode Voltage (VREF=0V,Ta=25°C) 1 Cathode Current IOFF (nA) Reference Voltage Change ∆VREF (mV) Reference Voltage Change vs. Cathode Voltage (IK=1mA,R1=Variable,R2=10kΩ,Ta=25°C) 4 3 2 1 0.8 0.6 0.4 0.2 0 0 0 5 10 15 0 5 10 Cathode Voltage VKA (V) Cathode Voltage VKA (V) Dynamic Impedance (IK=0.5~30mA,VKA=VREF,Ta=25°C) 1.2 80 Voltage Gain · Phase vs. Frequency (Fig.4 Test Circuit,Ta=25°C) 0.8 0.6 0.4 0.2 0 1 10 100 1k 10k 100k Cathode Current Frequency f (Hz) 15 360 270 60 1 Voltage Gain AV (dB) Dynamic Impedance |ZKA| (Ω) 60 Cathode Current IK (uA) Cathode Current IK (mA) -4- 40 Gain 40 180 20 90 0 0 -90 -20 Phase -40 -270 -60 -80 100 -180 Phase Φ (deg) Reference Voltage VREF (mV) ■TYPICAL CHARACTERISTICS 1k 10k 100k 1M Frequency f (Hz) -360 10M Ver.2009-11-26 NJM2373/73A/76 ■TYPICAL CHARACTERISTICS Safety Operating Boundary Condition Test Circuit Safety Operating Boundary Condition (Rin=1kΩ, V =V KA 1000 REF o , Ta=25 C) Rin=1kΩ Cathode Current IK (µA) Ceramic Capacitor 800 VKA IK Stable Operaion Region 600 V+ COUT 400 Unstable Operaion Region 200 0 0.01 Note) Oscillation might occur while operating within the range of safety curve. 0.1 1 Output Capacitor C OUT 10 (µF) So that, it is necessary to make ample margins by taking considerations of fluctuation of the device. Safety Operating Boundary Condition (Rin=1kΩ, V =V KA 1000 o , Ta=25 C) REF Cathode Current IK (µA) Aluminum Electrolytic Capacitor 800 600 Stable Operaion Region 400 200 0 0.1 Unstable Operaion Region 1 Output Capacitor C OUT Ver.2009-11-26 10 (µF) -5- NJM2373/73A/76 ■TYPICAL CHARACTERISTICS 1260 1255 1250 1245 1240 0 25 50 75 100 125 150 2.5 2 1.5 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) Ambient Temperature Ta (°C) Cathode Current (Off Cond.) vs. Temperature (VKA=13V,VREF=0V) 1 Output Noise Voltage vs. Temperature (IK=1mA,VKA=VREF) 0.8 0.6 0.4 0.2 140 120 100 80 60 40 20 0 0 -50 -25 0 25 50 75 100 125 150 Ambient emperature Ta (°C) -6- 3 Reference Input Current vs. Temperature (IK=1mA,R1=10kΩ,R2= ) -50 -25 Output Noise Voltage VNO (uVrms) Cathode Current IOFF (uA) -50 -25 Reference Input Current IREF (uA) Reference Voltage VREF (mV) Reference Voltage vs. Temperature (IK=1mA,VKA=VREF) -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) 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-