NJM2383 DC/DC CONVERTER CONTROL IC WITH CURRENT SENSE AMPLIFIER ■GENERAL DESCRIPTION ■PACKAGE OUTLINE The NJM2383 is a low voltage operation DC/DC converter control IC featuring high side current protection, soft start and standby functions. It is suitable for power module application and on-board regulators. NJM2383D ■FEATURES ● PWM switching control ● Operating Voltage (3.6 to 32V) ● Wide Oscillator Range (5 to 350 kHz) ● ON/OFF Circuit (High Active) ● Current Sensing Amplifier ● Soft-Start Function ● UVLO(Under Voltage Lockouts) ● Bipolar Technology ● Package Outline DIP14, DMP14, SSOP10 NJM2383M NJM2383V ■PIN CONFIGURATION 1 14 2 13 3 12 4 11 5 10 6 9 7 8 PIN FUNCTION 8.NC 1.NC 9. V+ 2.IN 1 3.IN-2 10.CS 11.CT 4.F.B 12.REF 5.GND 13.ON/OFF 6.OUT 14.NC 7.NC NJM2383D NJM2383M 1 10 2 9 3 8 4 7 5 6 NJM2383V PIN FUNCTION 6. V+ 1.IN-1 2.IN 2 7.CS 8.CT 3.F.B 9.REF 4.GND 10.ON/OFF 5.OUT Ver 1.0 - 1 - NJM2383 ■BLOCK DIAGRAM NC ON/OFF REF CT CS V+ NC 14 13 12 11 10 9 8 ON/OFF “High” Active VREF CURRENT SENSE AMP OSC L.O U.V.LO ER·AMP PWM 0.52V 1 NC 2 3 - 4 - IN 1 IN 2 5 F.B GND 6 7 OUT NC (Package: DIP14, DMP14) ON/OFF REF 10 9 ON/OFF “High” Active CT CS V+ 8 7 6 VREF CURRENT SENSE AMP OSC L.O U.V.LO ER·AMP PWM 0.52V 1 - IN 1 2 3 - F.B IN 2 4 GND 5 OUT (Package: SSOP10) -2- NJM2383 ■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL Input Voltage V+ Reference Output Current IOR Output Sink Current ISINK Differential Input Voltage VID Common Mode Input Voltage VIC ON/OFF Control Voltage VON/OFF Power Dissipation PD Operating Temperature Range Storage Temperature Range MAXIMUM RATINGS 36 10 200 2.5 -0.3 ∼ 2.5 -0.3 ∼ 36 (note) (DIP 14) 700 (DMP 14) 300 (SSOP 14) 250 -40 ∼ +85 -50 ∼ +125 TOPR TSTG UNIT V mA mA V V V mW °C °C (note) When the supply voltage is less than 36V, the absolute maximum input voltage is equal to the supply voltage. ■ELECTRICAL CHARACTERISTICS (V+=6V,RT=33kΩ,CT=1000pF,VON/OFF=3V,Ta=25°C) REFERENCE VOLTAGE BLOCK PARAMETER SYMBOL Output Voltage Line Regulation Load Regulation OSCILLATOR BLOCK PARAMETER Oscillation Frequency Oscillate Fluctuations1 (Line Fluctuations) Oscillate Fluctuations2 (Temp Fluctuations) VREF LINE LOAD IOR=1mA + V =3.6 ∼ 32V, IOR=1mA IOR=0.1 ∼ 5.0mA SYMBOL TEST CONDITION RT=33kΩ, CT=1000pF MIN. TYP. MAX. UNIT 2.45 – – 2.50 6.8 5 2.55 20.7 30 V mV mV MIN. TYP. MAX. UNIT 105 1 125 – kHz % fOSC fdV V =3.6 ∼ 32V 85 – fdT Ta=-40 ∼ 85°C – 5 – % MIN. TYP. MAX. UNIT – – – – – – 7 – 100 – – – mV nA nA dB MHz V 1 V 200 µA CURRENT SENSE AMPLIFIER BLOCK PARAMETER SYMBOL Input Offset Voltage1 Input Offset Current1 Input Bias Current1 Open Loop Gain1 Gain Bandwidth Product1 Input Common Mode Voltage Ratio1 Maximum Output Voltage1 (F.B Pin) Maximum Source Current1 (F.B Pin) TEST CONDITION + TEST CONDITION VIO1 IIO1 IB1 A V1 GB1 VICM1 VOM-1 RNF=100kΩ – 2 5 20 90 0.6 0∼ VREF-0.8 – IOM+1 VOM=0.5V 40 85 -3- NJM2383 ■ELECTRICAL CHARACTERISTICS (V+=6V,RT=33kΩ,CT=1000pF,VON/OFF=3V,Ta=25°C) ERROR AMPLIFIER BLOCK PARAMETER SYMBOL Reference Voltage2 Input Bias Voltage2 Open Loop Gain2 Gain Bandwidth Product2 Maximum Output Voltage2 (F.B Pin) Maximum Source Current2 (F.B Pin) PWM COMPARATE BLOCK PARAMETER Input Threshold Voltage (F.B Pin) Input Threshold Voltage (F.B Pin) MIN. TYP. MAX. UNIT 0.51 – – – – 0.52 5 90 0.6 – 0.53 100 – – 1 V nA dB MHz V 40 85 200 µA MIN. TYP. MAX. UNIT duty·cycle=0% (note) – 1.65 1.75 V duty·cycle=100% (note) – 2.10 – V MIN. TYP. MAX. UNIT CS Pin=1.8V – 250 650 nA VTHCS0 duty·cycle=0% (note) – 0.25 0.35 V VTHCS50 duty·cycle=100% (note) – 0.7 – V MIN. TYP. MAX. UNIT – – 60 2.70 2.52 180 – – – V V mV MIN. TYP. MAX. UNIT – 0.25 0.65 V VB2 IB2 A V2 GB2 VOM-2 RNF=100kΩ IOM+2 VOM=0.5V SYMBOL VTH0 VTH100 SOFT START CIRCUIT BLOCK PARAMETER SYMBOL Input Bias Current (CS Pin) Input Threshold Voltage (CS Pin) Input Threshold Voltage (CS Pin) IBCS UNDER VOLTAGE LOCKOUT BLOCK PARAMETER SYMBOL ON Threshold Voltage OFF Threshold Voltage Hysteresis Voltage OUTPUT BLOCK PARAMETER L Output Voltage (OUT Pin) -4- TEST CONDITION TEST CONDITION TEST CONDITION TEST CONDITION VTHON VTHOFF VHYS SYMBOL VOL TEST CONDITION Output Sink Current=100mA NJM2383 ■ELECTRICAL CHARACTERISTICS (V+=6V,RT=33kΩ,CT=1000pF,VON/OFF=3V,Ta=25°C) ON/OFF BLOCK PARAMETER SYMBOL OFF Threshold Voltage (ON/OFF Pin) ON Threshold Voltage (ON/OFF Pin) Input Bias Current (ON/OFF Pin) MIN. TYP. MAX. UNIT VOFF – – 0.3 V VON 1.1 – – V – 100 120 µA MIN. TYP. MAX. UNIT – 1.2 12 1.5 20 1.8 µA V – – 1.6 5.5 2.2 10 mA mA ION/OFF TEST CONDITION VON/OFF=3V GENERAL CHARACTERISTICS PARAMETER SYMBOL Stand-by Current Latch Mode Threshold Voltage (CS Pin) Quiescent Current Average Quiescent Current ICCSTBY VTHLA ICCLA ICCAV TEST CONDITION Stand-by Mode, VON/OFF=0V Latch Mode RL= , duty·cycle=50% (note) Duty·Cycle is defined as follows: Duty·Cycle=0%: IC output transistor is OFF. Duty·Cycle=100%: IC output transistor is ON. ■ TYPICAL APPLICATIONS + V 330kΩ ON/OFF CONTROL 4.7µF 36kΩ 180kΩ 1000pF 2.50V 10 9 ON/OFF “High” Active 8 VREF CURRENT SENSE AMP 7 6 VOUT OSC L.O U.V.LO ER·AMP 0.52V 1 PW M 2 3 GND 4 5 (Package:SSOP10) -5- NJM2383 ■TIPICAL CHARACTERISTICS L Output Voltage vs. Source Current (V+=6V,RT=33kΩ,CT=1000pF,Ta=25℃) L Output Voltage VOL (V) 1 Duty Cycle vs. CS Pin Voltage (V+=6V,Ta=25℃) 100 Duty Cycle α (%) 0.8 0.6 0.4 0.2 80 60 40 20 0 0 0 50 100 150 200 250 0 Source Current ISOURCE (mA) CS Pin Voltage VTHCS (V) Oscilltor Frequency f OSC (kHz) CT=470pF 100 100 CT=1000pF 10 1000 RT=33kΩ RT=100kΩ 1 1 10 100 1000 Timing Resistor RT (kΩ) 10000 10 Reference Voltage vs. Operating Voltage (V+=6V,Ta=25°C) 2.52 2.51 2.5 2.49 2.48 100 1000 10000 Timing Capacitor CT (pF) 100000 Suuply Current vs. Supply Voltage (Ta=25℃) 10 Suuply Current ICC (mA) Reference Voltage VREF (V) RT=10kΩ 10 1 8 6 ICCAV 4 ICCLA 2 0 0 10 20 30 + Operating Voltage V (V) -6- Oscillator Frequency vs. Timing Capacitor (V+=6V,Ta=25°C) Oscillator Frequencey fOSC (kHz) Oscillator Frequency vs. Timing Resistor (V+=6V,Ta=25°C) 1000 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 40 0 10 20 30 + Supply Voltage V (V) 40 NJM2383 ■TIPICAL CHARACTERISTICS Oscillator Frequency vs. Temperature (V+=6V,RT=33kΩ,CT=1000pF) 140 3 Reference Voltage VREF (V) Oscillator Frequency f OSC (kHz) 160 120 100 80 Reference Voltage vs. Temperature (V+=6V,IOR=1mA) 2.8 2.6 2.4 2.2 2 60 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) L Output Voltage vs. Tenperature (V =6V,ISINK=100mA,RT=33kΩ,CT=1000pF) Supply Current vs. Tenperature (V+=6V,RT=33kΩ,CT=1000pF) + Supply Current ICC (mA) 8 0.4 0.3 0.2 0.1 6 ICCAV 4 ICCLA 2 0 0 -50 -25 0 25 50 75 100 125 150 Anbient Temperature Ta (℃) 50 Stand-by Current ICCSTBY (µA) L Output Voltage VOL (V) 0.5 -50 -25 0 25 50 75 100 125 150 Ambient Tenperature Ta (℃) Stand-by Current vs. Temperature (Stand-by Mode,V+=6V,VON/OFF=0V) 40 30 20 10 0 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (°C) [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. -7-