NJM2368 SWITCHING REGULATOR CONTROL IC FOR FLYBACK GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2368 is a high speed switching regulator control IC which can operate at low voltage. It uses a totempole output circuit , so that it can drive an external Bipolar Transistor directly. It is suitable for applications of flyback type switching NJM2368D NJM2368M regulation of up to 10W. FEATURES NJM2368E NJM2368V Operating Voltage (3.6V ~ 32V) Wide Oscillator Range (5kHz ~ 350 kHz) Soft-Start function. Under Voltage Lockouts (U.V.L.O.) Bipolar Technology Package Outline DIP8, DMP8, EMP8, SSOP8 BLOCK DIAGRAM + REF CT CS V 8 7 6 5 30uA PIN FUNCTION - V OSC 1. IN REF 2. F.B L.O U.V.LO 3. GND 500 4. OUT + 5. V S.C.P 6. CS ER AMP 0.52V 7. CT PWM 8. REF 1 2 3 4 - IN OUTF.B GND Ver.2004-06-03 -1- NJM2368 ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL MAXIMUM RATINGS UNIT + Input Voltage V 36 V Reference Output Current I 10 mA OR Output Current I 50 mA O (DIP 8) 700 (DMP 8) 300 Power Dissipation P mW D (EMP 8) 300 (SSOP 8) 250 Operating Temperature Range T -40 ~ +85 C OPR Storage Temperature Range T -50 ~ 125 C STG + RECOMMENDED OPERATING CONDITIONS (V =6V, Ta=25C) PARAMETER SYMBOL RATINGS MIN. MAX. UNIT + Operating Voltage V 3.6 32 V Feed Back Resistor R 100 k NF Oscillator Timing Capacitor C 220 22,000 pF T Oscillator Timing Resistor R 10 100 k T Oscillate f 5 350 kHz OSC + ELECTRICAL CHARACTERISTICS (V =6V, R =33k, C =1,000pF, Ta=25C) T T REFERENCE VOLTAGE BLOCK PARAMETER SYMBOL RATINGS MIN. TYP. MAX.UNIT Output Voltage V I=1mA 2.45 2.50 2.55 V REF OR + Line Regulation L V =3.6V ~ 32V, I=1mA 6.8 20.7 mV INE OR L Load Regulation I =0.1mA ~ 5.0mA 5 30 mV OAD OR OSCILLATOR BLOCK PARAMETER SYMBOL RATINGS MIN. TYP. MAX.UNIT Oscillate fosc C =1,000pF, R =33k 85 105 125 kHz T T Oscillate Fluctuations1 f + dv V =3.6V ~ 32V 1 % (Line Fluctuations) Oscillate Fluctuations2 f dt Ta=-40C ~ +85C 5 % (Temp Fluctuations) ERROR AMPLIFIER BLOCK PARAMETER SYMBOL RATINGS MIN. TYP. MAX.UNIT Reference Voltage V 0.51 0.52 0.53 V B Input Bias Current I 5 100 nA B Open Loop Gain A 90 dB V Gain Band width Product G 0.6 MHz B V R =100k V-0.2 V OM+ NF REF Maximum Output Voltage (F.B Pin) V R =100k 200 mV OM- NF Output Source Current I V=1V 40 85 200 uA OM+ OM (F.B Pin) Ver.2004-06-03 - 2 -