NJU7606 Step-Up / Flyback Switching Regulator IC with Load Switch Function GENERAL DESCRIPTION PACKAGE OUTLINE The NJU7606 are low voltage operation high speed switching regulator control ICs for step-up and flyback converter, with a load switch function. The load switch function can disrupt the current flow to the load in standby mode and latch mode. The NJU7606 also have a soft-start function, dead time control and timer latch for short circuit protection and their times are all adjustable with external parts. The NJU7606 is available in 10-lead MSOP (TVSP) package. They are suitable for battery powered applications. FEATURES PWM switching control Load Switch Function Operating Voltage Wide Oscillator Range Maximum Duty Cycle Quiescent Current NJU7606RB2 (MSOP10(TVSP10)) PRODUCT VARIATION 2.2V to 8V 300kHz to 1MHz 90% typ. Operating: 800A typ. Standby: 1A max. Internal : 16ms typ. or adjustable NJU7606 Load SW, Standby Function NJU7602 Standby Function Soft-Start Function Dead Time Control Timer Latch for Short Circuit Protection C-MOS Technology Package Outline NJU7606RB2 : MSOP10 (TVSP10)* *MEET JEDEC MO-187-DA / THIN TYPE PIN CONFIGURATION 1 10 2 9 3 8 4 7 5 6 NJU7606RB2 Ver.2012-08-01 PIN FUNCTION 1. V+ 2. LSW 3. FB 4. IN5. SCP 6. ON/OFF 7. DTC 8. RT 9. GND 10. OUT -1- NJU7606 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.2012-08-01 NJU7606 ABSOLUTE MAXIMUM RATINGS 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 PD Operating Temperature Range TOPR Storage Temperature Range TSTG (Ta=25C) 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. MAXIMUM RATINGS +9 +9 50 -10 +9 (*1) 320 -40 to +85 -40 to +125 RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL Operating Voltage V+ Oscillator Timing Resistor RT Oscillation Frequency fOSC MIN. 2.2 30 300 TYP. - 47 700 (V+=VON/OFF=3.3V, RT=47k, Ta=25C) ELECTRICAL CHARACTERISTICS 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.2012-08-01 MAX. 8 120 1,000 (Ta=25C) UNIT V k kHz 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 to 8V - 1 - % fDT Ta=-40C to +85C - 3 - % -3- NJU7606 (V+=VON/OFF=3.3V, RT=47k, Ta=25C) ELECTRICAL CHARACTERISTICS 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 VT_0 VT_50 MAXDUTY_1 MAXDUTY_2 Duty=0% Duty=50% VFB=0.9V VFB=0.9V, RDTC=47k Output Block Output High Level ON Resistance Output Low Level ON Resistance ROH IO=-20mA - 10 20 ROL IO=+20mA - 5 10 Load SW Output Block LSW Output ON Resistance LSW Output Leak Current RLSW 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 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.2012-08-01 NJU7606 TYPICAL APPLICATIONS Step-Up Converter (Input Line Load SW) SBD L + V VOUT CIN RP FET: Load SW COUT FET C + V LSW OUT FB CNF R1 GND NJU7606 IN- RNF R2 SCP RT RT GND ON/OFF DTC RDTC CSCP CS ON/OFF High : ON Low : OFF (Standby) Step-Up Converter (Onput Line Load SW) SBD L FET: Load SW + V VOUT CIN COUT C + V FET LSW RNF R1 OUT NJU7606 RT GND RT INSCP RP GND FB CNF R2 ON/OFF DTC CSCP RDTC CS ON/OFF High : ON Low : OFF (Standby) Ver.2012-08-01 -5- NJU7606 TYPICAL CHARACTERISTICS Oscillation Frequency vs. Timing Resistance (V =3.3V, Ta=25 C) (V+=3.3V, Ta=25oC) 100 Maximum Duty Cycle M D (%) 1000 95 90 AX UTY_1 Oscillation Frequency f Maximum Duty Cycle vs. Oscillator Frequency o OSC 100 10 85 80 100 100 Timing Resistance RT (k) 1000 Oscillator Frequency fOSC (kHz) Duty Cycle vs. R DTC Oscillation Frequency fosc (kHz) Oscillation Frequency vs. Operating Voltage (RT=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 Voltage Gain Av (dB) B Reference Voltage V (V) 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 + o (V =3.3V, Gain=40dB, Ta=25 C) (Ta=25oC) 1.004 0.996 T 80 UTY 720 660 (V =3.3V, R =47k, Ta=25 C) 100 (%) 740 o + 45 Phase 180 135 Gain 30 90 15 45 0 0.1 1 10 100 1000 Frequency f (kHz) Phase (deg) (kHz) + 0 10000 Ver.2012-08-01 NJU7606 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.2012-08-01 -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 o Ambient Temperature Ta ( C) OM+ 1000 0.4 10 2 =0V, Ta=25oC) 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 o Ambient Temperature Ta ( C) 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 TYPICAL CHARACTERISTICS Soft Start Time vs. Temperature Reference Voltage vs. Temperature + (V =3.3V) (V) 22 1.005 B 20 18 16 14 12 10 8 -50 (V+=3.3V) 1.01 Reference Voltage V Soft Start Time Tss (ms) 24 1 0.995 0.99 -50 -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) Oscillator Frequency vs. Temperature -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) Muximum Duty Cycle vs. Temperature 760 (V =3.3V, R =47k) 740 MAX DUTY_1 80 70 AX 700 680 660 Threshold Voltage (V) 60 MAX DUTY_2 50 40 -50 -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) 2.06 -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) Under Voltage Lockout Block vs. Temperature 2.02 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) + VT_OFF -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) Ver.2012-08-01 NJU7606 V+=1.95V 120 100 V+=3.3V 80 60 40 + 20 0 -50 (V+=3.3V, RT=47k, VLSW =9V, VON/OFF=0V) 100 LEAK_LSW 140 LSW Output Leak Current vs. Temperature (nA) LSW Output ON Resistance vs. Temperature (ILSW =1mA) 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 o Ambient Temperature Ta ( C) 0 -50 -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) ON/OFF Control Voltage VON/OFF (V) ON/OFF Control Voltage vs. Temperature Ver.2012-08-01 1 (V+=3.3V) 0.95 0.9 V ON 0.85 0.8 V OFF 0.75 0.7 0.65 0.6 -50 -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) -9- NJU7606 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.2012-08-01