NJM2377 SWITCHING REGULATOR CONTROL IC GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2377 is a high speed low voltage operation switching regulator control IC. It features a totem pole driver circuit that can directly drive an external Bipolar transistor. The NJM2377 is suitable for potable applications, including TFT panel supply with fly-back configuration. FEATURES PWM switching control Operating Voltage (2.7 to 18V) Wide Oscillator Range (10 to 500 kHz) ON/OFF Maximum Duty Cycle (Ton:Toff = 9:1) Totem Pole Output Soft-Start Function UVLO (Under Voltage Lockout) Bipolar Technology Package Outline DIP8, DMP8, SSOP8, VSP8 NJM2377D NJM2377M NJM2377V NJM2377R BLOCK DIAGRAM REF CT CS V+ 8 7 6 5 30uA VREF PIN FUNCTION 1. IN2. F.B 3. GND 4. OUT 5. V+ 6. CS 7. CT 8. REF OSC L.O U.V.LO S.C.P ER*AMP 0.52V PWM 1 IN- 2 F.B 3 GND 4 OUT Ver 2.2 - 1 - NJM2377 ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL Input Voltage V+ Output Current IO Power Dissipation PD Operating Temperature Range Storage Temperature Range TOPR TSTG MAXIMUM RATINGS 18 50 (DIP 8) 700 (DMP 8) 300 (SSOP 8) 250 (VSP 8) 320 -40 +85 -50 +125 RECOMEND OPERATING CONDITIONS (V+=3V, Ta=25C) PARAMETER SYMBOL MIN. MAX. + Operating Voltage V 2.7 18 Feed Back Resistor RNF 100 - Oscillator Timing Capacitor CT 220 22,000 Oscillator Timing Resistor RT 5 100 Oscillation Frequency fOSC 10 500 -2- UNIT V mA mW C C UNIT V k pF k kHz NJM2377 ELECTRICAL CHARACTERISTICS (V+=3V,RT=39k,CT=470pF,Ta=25C) REFERENCE VOLTAGE BLOCK PARAMETER SYMBOL Output Voltage Line Regulation Load Regulation OSCILLATOR BLOCK PARAMETER Oscillation Frequency Oscillate Fluctuations1 (Line Fluctuations) Oscillate Fluctuations2 (Temp Fluctuations) Output Source Current (F.B Pin) PWM COMPARATE BLOCK PARAMETER Input Threshold Voltage (F.B Pin) Input Threshold Voltage (F.B Pin) Maximum Duty Cycle (CS Pin) Input Threshold Voltage (CS Pin) Input Threshold Voltage (CS Pin) TYP. MAX. UNIT 1.47 - - 1.50 3.8 5 1.53 11.5 30 V mV mV MIN. TYP. MAX. UNIT V =2.7 18V 80 - 100 1 120 - kHz % Ta=-40C +85C - 5 - % MIN. TYP. MAX. UNIT 0.52 5 90 1.0 2.2 0.53 100 - - 2.4 V nA dB MHz V SYMBOL fOSC fdV fdT TEST CONDITION RT=39k, CT=470pF + TEST CONDITION VB IB AV GB VOM+ RNF=100k, IN- Pin=0V 0.51 - - - 1.9 VOMIOM+ RNF=100k, IN- Pin=0V VOM=1V, IN- Pin=0V - 40 - 85 200 200 mV A MIN. TYP. MAX. UNIT SYMBOL TEST CONDITION VTH0 duty*cycle=0% - 0.45 0.65 V VTH80 duty*cycle=80% - 1.05 - V F.B Pin=1.2V RT=39k, CT=470pF 80 90 - % MIN. TYP. MAX. UNIT - 250 650 nA M SOFT START CIRCUIT BLOCK PARAMETER SYMBOL Input Bias Current MIN. VREF IOR=1mA VO-VIN V+=2.7 18V, IOR=1mA VO-IO IOR=0.1 5.0mA ERROR AMPLIFIER BLOCK PARAMETER SYMBOL Reference Voltage Input Bias Current Open Loop Gain Gain Bandwidth Product Maximum Output Voltage (F.B Pin) TEST CONDITION TEST CONDITION IBCS VTHCS0 duty*cycle=0%, F.B Pin=1.2V - 0.25 0.35 V VTHCS80 duty*cycle=80%, F.B Pin=1.2V - 0.79 - V -3- NJM2377 ELECTRICAL CHARACTERISTICS (V+=3V,RT=39k,CT=470pF,Ta=25C) SHORT CIRCUIT PROTECTION PARAMETER SYMBOL Input Threshold Voltage (F.B Pin) Charge Current (CS Pin) Latch Mode Threshold Voltage (CS Pin) VTHPC ICHG VTHLA UNDER VOLTAGE LOCKOUT PARAMETER SYMBOL ON Threshold Voltage OFF Threshold Voltage Hysteresis Voltage OUTPUT BLOCK PARAMETER H-Output Voltage (OUT Pin) L-Output Voltage (OUT Pin) Output Source Current (OUT Pin) -4- CS Pin=0V, F.B Pin=2V TEST CONDITION VTHON VTHOFF VHYS SYMBOL VOH VOL ISOURCE GENERAL CHARACTERISTICS PARAMETER SYMBOL Quiescent Current Average Quiescent Current TEST CONDITION ICCLA ICCAV TEST CONDITION RL=10k Output Sink Current=20mA Out Pin=0V TEST CONDITION Latch Mode, CS Pin=1.8V RL= , duty*cycle=50% MIN. TYP. MAX. UNIT 1.30 1.50 1.80 V 10 1.20 30 1.50 50 1.80 A V MIN. TYP. MAX. UNIT - - 60 1.95 1.78 170 - - - V V mV MIN. TYP. MAX. UNIT 1.7 - 23 2.0 0.25 35 - 0.65 - V V mA MIN. TYP. MAX. UNIT - - 1.7 5.0 2.4 6.8 mA mA NJM2377 TYPICAL APPLICATIONS + V Rsf Rsr Rt 8 Cs Ct 7 6 D1 5 VOUT 30uA VREF OSC L.O U.V.LO CIN N1 S.C.P R2 N2 ER*AMP 0.52V PWM COUT 1 2 3 CLP VR1 4 Q1 R1 Rf GND GND -5- NJM2377 TIPICAL CHARACTERISTICS 1.2 L Output Voltage VOL (V) H Output Voltage VOH (V) H Output Voltage(OUT Pin) vs. Source Current (V+=3V,CT=0V,CS=1V,Ta=25C) 3 2.5 2 1.5 1 0.5 L Output Voltage(OUT Pin) vs. Sink Current (V+=3V,CS=FB=0V,CT=0.5V,Ta=25C) 1 0.8 0.6 0.4 0.2 0 0 0 1000 10 20 30 0 40 10 20 30 40 50 60 Source Current ISOURCE (mA) Sink Current ISINK (mA) Oscillator Frequency vs. Timing Resistor (V+=3V,Ta=25C) Oscillator Frequency vs. Timing Capacitor (V+=3V,Ta=25C) 1000 RT=10k 100 Oscillator Frequency f OSC (kHz) Oscillator Frequency f OSC (kHz) RT=39k CT=470pF CT=1000pF 10 100 10 1 1 1 10 100 1000 Timing Resistor RT (k) 1.5 1.48 1.46 1.44 1.42 100 1000 10000 Timing Capacitor CT (pF) 100000 Operating Current vs. Operating Voltage (Ta=25C) 6 Operating Current ICC (mA) Reference Voltage VREF (V) 10 10000 Reference Voltage vs. Output Current (V+=3V,Ta=25C) 1.52 ICCAV 5 4 3 ICCLA 2 1 0 0 5 10 Output Current IOR (mA) -6- RT=100k 15 0 5 10 15 Operating Voltage V+ (V) 20 NJM2377 TIPICAL CHARACTERISTICS Maximum Duty Cycle vs. Oscillator Frequency (V+=3V,Ta=25C) Maximum Duty Cycle M (%) 100 90 80 70 60 50 40 30 20 10 0 10 100 1000 10000 Duty Cycle (%) Oscillator Frequency f OSC (kHz) Duty Cycle vs. CS Pin Voltage (V+=3V,Ta=25C) 100 90 80 70 60 50 40 30 20 10 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 CS Pin Voltage (V) Average Quiescent Current vs. Temperature (V +=3V,RL= ,duty*cycle=50% 2 1.5 1 0.5 0 RT=39k,CT=470pF) 5 Average Quiescent Current ICCAV (mA) Quiescent Current (Latch Mode) ICCLA (mA) Quiescent Current(Latch Mode) vs.Temperature (V+=3V,CS=1.8V) 2.5 4 3 2 1 0 -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) -7- NJM2377 TIPICAL CHARACTERISTICS Reference Voltage Block Reference Voltage vs. Temperature (V+=3V,IOR=1mA) Oscillator Frequency f OSC (kHz) Reference Voltage VREF (V) 1.56 1.54 1.52 1.5 1.48 1.46 1.44 -50 -25 25 50 80 0 25 50 75 100 125 150 Ambient Temperature Ta (C) Error Amplifire Block Reference Voltage vs. Temperaure (V+=3V) Maximum Duty Cycle vs. Temperature (V+=3V,RT=39k,CT=470pF) 0.52 0.51 100 95 90 85 80 -50 -25 0 25 50 75 100 125 150 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) Ambient Temperature Ta (C) Charge Current (CS Pin) vs. Temperature (V+=3V,F.B Pin=2V) Under Voltage Lockout Block ON/OFF Threshold Voltage vs. Temperature 3 Operating Voltage V (V) 35 + Charge Current ICHG (uA) 90 -50 -25 0.5 30 25 20 2.5 VTHON 2 VTHOFF 1.5 1 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) -8- 100 Ambient Temperature Ta (C) 0.53 40 110 75 100 125 150 Maximum Duty Cycle (%) Error Amplifire Block Reference Voltage VB (V) 0.54 0 120 Oscillator Frequency vs. Temperature (V+=3V,RT=39k,CT=470pF) -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) NJM2377 TIPICAL CHARACTERISTICS H Output Voltage VOH (V) H Output Voltage (OUT Pin) vs. Temperature (V+=3V,RL=10k) 3 2.5 2 1.5 1 0.5 0 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) L Output Voltage VOL (mV) L Output Voltage (OUT Pin) vs. Temperature (V+=3V,ISINK=20mA) 160 140 120 100 80 60 40 20 0 -50 -25 0 25 50 75 100 125 150 Ambient Temperature Ta (C) Output Source Current ISOURCE (mA) 40 Output Source Current (OUT Pin) vs. Temperature (V+=3V,OUT Pin=0V) 35 30 25 20 15 10 5 0 -50 -25 0 25 50 75 100 125 150 [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. Ambient Temperature Ta (C) -9- Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: NJR: NJM2377V-TE1 NJM2377M NJM2377D NJM2377R-TE2 NJM2377M-TE2 NJM2377M-TE1 NJM2377V-TE2 NJM2377R-TE1