NJU7606, NJU7608 Step-Up / Flyback Switching Regulator IC with Load Switch Function GENERAL DESCRIPTION PACKAGE OUTLINE NJU7606/08 is a high speed low voltage operation switching regulator control IC with load switch function. It features a which disconnects load from input during standby and also provides latch mode. NJU7606RB2 FEATURES PWM switching control Load Switch Function Operating Voltage Wide Oscillator Range Maximum Duty Cycle Quiescent Current NJU7608PB1 PRODUCT VARIATION NJU7608 2.2V to 8V 300kHz to 1MHz 90% typ. Operating: 800A typ. Standby: 1A max. Internal : 16ms typ. or adjustable NJU7606 small PKG NJU7606 Load SW, Standby Function Soft-Start Function Dead Time Control Timer Latch for Short Circuit Protection C-MOS Technology Package Outline NJU7606RB2 : TVSP10 NJU7608PB1 : FFP12 -B1 NJU7602 Standby Function PIN CONFIGURATION 1 10 2 9 3 8 4 7 5 6 NJU7606RB2 Ver.2006-02-13 PIN FUNCTION 1. V+ 2. LSW 3. FB 4. IN5. SCP 6. ON/OFF 7. DTC 8. RT 9. GND 10. OUT 9 8 7 7 8 9 10 6 6 10 11 5 5 11 12 4 4 12 1 2 3 3 TOP 2 1 UNDER NJU7608PB1 PIN FUNCTION 1. GND 2. RT 3. DTC 4. ON/OFF 5. SCP 6. IN7. FB 8. LSW 9. V+ 10. N.C. 11. OUT 12. N.C. -1- NJU7606, NJU7608 BLOCK DIAGRAM V+ FB 0.8V ERAMP IN1V 0.2V Vref LSW Soft Start UVLO Latch PWM Buffer 2A SCP OUT SCP OSC 2k 0.5V 0.5 1V RT 0.74V A Standby ON/OFF 1V GND DTC RT ON/OFF RT -2- High: ON Low : OFF (Standby) Ver.2006-02-13 NJU7606, NJU7608 ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL Supply Voltage V+ LSW Output Voltage VLSW Output Pin Current IO LSW Output Current ILSW ON/OFF Pin Voltage VON/OFF Power Dissipation Operating Temperature Range Storage Temperature Range PD TOPR TSTG MAXIMUM RATINGS +9 +9 50 -10 +9 (*1) TVSP10 :320 FFP12-B1 :300 (*2) -40 ~ +85 -40 ~ +125 UNIT V V mA mA V mW C C *1: When input voltage is less than 9V, the absolute maximum control voltage is equal to the input voltage. *2: On board. 25mmx25mmx0.2mm RECOMMENDED OPERATING CONDITIONS (Ta=25C) PARAMETER SYMBOL MIN. + Operating Voltage V 2.2 Oscillator Timing Resistor RT 30 Oscillation Frequency fOSC 300 TYP. - 47 700 MAX. 8 120 1,000 UNIT V k kHz ELECTRICAL CHARACTERISTICS (V+=VON/OFF=3.3V, RT=47k, Ta=25C) PARAMETER Under Voltage Lockout Block ON Threshold Voltage OFF Threshold Voltage Hysteresis Voltage Soft Start Block Soft Start Time Short Circuit Protection Block Input Threshold Voltage Charge Current Latch Mode ON Threshold Voltage Latch Mode OFF Threshold Voltage Oscillator Block RT Pin Voltage Oscillation Frequency Oscillate Supply Voltage Fluctuations Oscillate Temperature Fluctuations Ver.2006-02-13 SYMBOL VT_ON VT_OFF VHYS TSS TEST CONDITION V+= L H V+= H L VT_ON Duty=80% MIN. TYP. MAX. UNIT 1.9 1.8 60 2.0 1.9 100 2.1 2.0 - V V mV 8 16 24 ms VT_PC ICHG FB Pin VSCP=0V 0.95 1.5 1.00 2 1.05 2.5 V A VT_LA SCP Pin 0.95 1.00 1.05 V VT_LAOFF SCP Pin 0.2 0.45 0.7 V -5% 630 0.5 700 +5% 770 V kHz VRT fOSC fDV V+=2.2V ~ 8V - 1 - % fDT Ta=-40C ~ +85C - 3 - % -3- NJU7606, NJU7608 ELECTRICAL CHARACTERISTICS (V+=VON/OFF=3.3V, RT=47k, Ta=25C) PARAMETER Error Amplifier Block Reference Voltage Input Bias Current Open Loop Gain Gain Bandwidth Product Output Source Current Output Sink Current SYMBOL TEST CONDITION VB IB AV GB IOM+_1 IOM+_2 IOM- VFB=1V, VIN-=0.9V VFB=1V, VIN-=0.9V, V+=2.2V VFB=1V, VIN-=1.1V MIN. TYP. MAX. UNIT -1.5% -0.1 - - 20 4 0.10 1.00 - 80 1 45 9 0.16 +1.5% 0.1 - - 70 16 0.22 V A dB MHz mA mA mA 0.16 0.44 85 40 0.22 0.5 90 50 0.28 0.56 95 60 V V % % PWM Comparate Block Input Threshold Voltage Maximum Duty Cycle Output Block Output High Level ON Resistance Output Low Level ON Resistance Load SW Output Block LSW Output ON Resistance LSW Output Leak Current VT_0 VT_50 MAXDUTY_1 MAXDUTY_2 Duty=0% Duty=50% VFB=0.9V VFB=0.9V, RDTC=47k ROH IO=-20mA - 10 20 ROL IO=+20mA - 5 10 ILSW=1mA VLSW=9V, VON/OFF=0V - - 55 - 100 0.1 A 1.6 0 - - V+ 0.3 V V - - 800 - 1200 1.0 A A RLSW ILEAK_LSW ON/OFF Block ON Control Voltage OFF Control Voltage VON VOFF VON/OFF= L H VON/OFF= H L General Characteristics Quiescent Current Standby Current IDD IDD_STB RL=Non Load VON/OFF=0V -4- Ver.2006-02-13 NJU7606, NJU7608 TYPICAL APPLICATIONS Step-Up Converter (Input Line Load SW) SBD L V + VOUT RP CIN FET: Load SW COUT FET C V + LSW INSCP R1 OUT FB CNF RNF R2 GND NJU7606 NJU7608 RT RT GND ON/OFF DTC CSCP CS RDTC ON/OFF High : ON Low : OFF (Standby) Step-Up Converter (Onput Line Load SW) SBD L V FET: Load SW + VOUT CIN COUT C V + FET LSW RNF INSCP RP R1 OUT GND FB CNF R2 NJU7606 NJU7608 RT GND RT ON/OFF DTC CSCP RDTC CS ON/OFF High : ON Low : OFF (Standby) Ver.2006-02-13 -5- NJU7606, NJU7608 TYPICAL CHARACTERISTICS Oscillation Frequency vs. Timing Resistance + (V =3.3V, Ta=25 C) 90 AX UTY_1 95 100 10 85 80 100 100 Timing Resistance RT (k) 1000 Oscillator Frequency fOSC (kHz) Duty Cycle vs. R DTC (R =47k, Ta=25oC) 60 (%) AX Duty Cycle M D 700 680 40 20 0 0 2 4 6 8 + Operating Voltage V (V) 10 Reference Voltage vs. Operating Voltage (Ta=25 C) 1.004 B Voltage Gain Av (dB) 60 1.002 1 0.998 -6- 0 2 4 6 8 + Operating Voltage V (V) 10 0 20 40 60 80 100 Dead Time Control Resistance RDTC (k) Error Amplifier Block Voltage Gain, Phase vs. Frequency (V+=3.3V, Gain=40dB, Ta=25 oC) o 0.996 T 80 UTY 720 660 (V =3.3V, R =47k, Ta=25 C) 100 T 740 o + 45 Phase 180 135 Gain 30 90 15 45 0 0.1 1 10 100 1000 Frequency f (kHz) Phase (deg) Oscillation Frequency fosc (kHz) Oscillation Frequency vs. Operating Voltage Reference Voltage V (V) o (V =3.3V, Ta=25 C) 100 Maximum Duty Cycle (%) M D 1000 Oscillation Frequency f Maximum Duty Cycle vs. Oscillator Frequency o OSC (kHz) + 0 10000 Ver.2006-02-13 NJU7606, NJU7608 TYPICAL CHARACTERISTICS Quiescent Current vs. Operating Voltage Standby Current vs. Operating Voltage o (R =47k, R =Non Load, Ta=25 C) T (nA) Standby Current I 1000 800 600 400 200 2 4 6 8 + Operating Voltage V (V) + V =1.95V 14 V+=3.3V 8 6 4 V+=8V 0 -50 0 0 14 (mA) Error Amplifier Block Output Source Current vs. Temperature (VFB=1V, VIN-=0.9V) V+=8V 100 + 10 V =3.3V V+=1.95V 1 -50 Ver.2006-02-13 -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) OM- Output Source Current I 0.2 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) OM+ 1000 0.4 10 2 o =0V, Ta=25 C) 2 4 6 8 + Operating Voltage V (V) 10 Output Block Output Low Level ON Resistance vs. Temperature (Io=+20mA) 12 12 10 ON/OFF 0.6 10 Output Block Output High Level ON Resistance vs. Temperature (Io=-20mA) T 0.8 Output Low Level ON Resistance ROL () 0 16 OH Output High Level ON Resistance () R 0 (mA) DD_STB 1200 (R =47k, V 1 Output Sink Current I Quiescent Current IDD (A) 1400 L V+=1.95V 8 6 V+=3.3V 4 2 0 -50 0.2 V+=8V -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Error Amplifier Block Output Sink Current vs. Temperature (VFB=1V, VIN- =1.1V) 0.15 V+=1.95V, 3.3V, 8V 0.1 0.05 0 -50 -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) -7- NJU7606, NJU7608 TYPICAL CHARACTERISTICS Soft Start Time vs. Temperature Reference Voltage vs. Temperature + (V =3.3V) 22 20 1.005 18 16 14 12 1 0.995 10 8 -50 (V+=3.3V) 1.01 Reference Voltage VB (V) Soft Start Time Tss (ms) 24 0.99 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Oscillator Frequency vs. Temperature -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Muximum Duty Cycle vs. Temperature 760 (V =3.3V, R =47k) 740 MAX DUTY_1 80 70 AX 700 680 660 Threshold Voltage (V) 2.02 60 MAX DUTY_2 50 40 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) 2.06 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Under Voltage Lockout Block vs. Temperature V T_ON 1.98 1.94 1.9 1.86 -50 -8- 90 UTY 720 640 -50 (V+=3.3V) 100 T Muximum Duty Cycle (%) M D Oscillator Frequency fOSC (kHz) + V T_OFF -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) Ver.2006-02-13 NJU7606, NJU7608 V+=1.95V 120 100 V+=3.3V 80 60 40 + 20 0 -50 =9V, V =0V) (V+=3.3V, R =47k, V T LSW ON/OFF 100 LEAK_LSW 140 LSW Output Leak Current vs. Temperature (nA) LSW Output ON Resistance vs. Temperature (I =1mA) LSW 160 LSW Output Leak Current I LSW Output ON Resistance RLSW () TYPICAL CHARACTERISTICS V =8V -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) 10 1 0.1 0.01 -50 Standby Current vs. Temperature Quiescent Current vs. Temperature + + (V =3.3V, R =47k) 1 T Standby Current IDD_STB (A) Quiescent Current IDD (A) 1000 800 600 400 200 0 -50 -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) (V =3.3V, R =47k, V T ON/OFF =0V) 0.8 0.6 0.4 0.2 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) 0 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) ON/OFF Control Voltage VON/OFF (V) ON/OFF Control Voltage vs. Temperature Ver.2006-02-13 1 (V+=3.3V) 0.95 0.9 V 0.85 0.8 ON V OFF 0.75 0.7 0.65 0.6 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) -9- NJU7606, NJU7608 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. - 10 - Ver.2006-02-13