NJU7600 PWM control Step-Up / Flyback switching regulator IC ■GENERAL DESCRIPTION ■PACKAGE OUTLINE The NJU7600 is a low voltage operation high-speed switching regulator control IC for PWM control step-up and fly-back converter. It incorporates a totem pole driver output, which can directly drive an external MOS-FET easily. The NJU7600 also has a soft-start NJU7600M NJU7600RB1 function, dead time control and timer latch for short circuit protection (DMP8) (MSOP8 (TVSP8)) and their times are all adjustable with external parts. It is available in 8-lead DMP, MSOP (TVSP) packages and 10-lead MSOP (TVSP) package. It is suitable for battery powered applications. NJU7600RB2 (MSOP10(TVSP10)) ■FEATURES ■PRODUCT VARIATION ● PWM switching control NJU7601 NJU7602 ● Operating Voltage 2.2V to 8V PWM/PFM Standby Function ● Wide Oscillator Range 300kHz to 1MHz Light Load to Efficiency ● Maximum Duty Cycle 90% typ. Over Current Protection ● Quiescent Current 800µA typ. NJU7600 NJU7610 ● Soft-Start Function Internal : 16ms typ. or adjustable ● Dead Time Control PWM Control Constant Current Control ● Timer Latch for Short Circuit Protection NJU7620 ● C-MOS Technology ● Package Outline NJU7600M : DMP8 NJU7600RB1 : MSOP8 (TVSP8)* NJU7600RB2 : MSOP10 (TVSP10)* *MEET JEDEC MO-187-DA / THIN TYPE ■PIN CONFIGURATION PIN FUNCTION PIN FUNCTION 1 8 1. V+ 1 10 1. V+ 2. N.C. 2. FB 2 9 2 7 3. IN- 3. FB 3 8 4. IN- 4. SCP 3 6 5. DTC 4 7 5. SCP 6. DTC 4 5 6. RT 5 6 7. RT 7. GND 8. GND NJU7600M 8. OUT NJU7600RB2 9. GND NJU7600RB1 10. OUT Ver.2012-08-03 -1-

NJU7600 ■BLOCK DIAGRAM V+ NJU7600M FB ER⋅AMP 0.8V NJU7600RB1 IN- 1V Vref 0.2V Soft Start UVLO Latch PWM 2µA Buffer OUT SCP SCP OSC 2kΩ 0.5V 0.74V 0.5 A RT 1V 1V DTC RT GND RT V+ NJU7600RB2 FB ER⋅AMP 0.8V IN- 1V Vref 0.2V Soft Start UVLO Latch PWM 2uA Buffer OUT SCP SCP OSC 2kΩ 0.5V 0.74V 0.5 A N.C. RT 1V 1V DTC RT GND GND RT -2- Ver.2012-08-03

NJU7600 ■ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL MAXIMUM RATINGS UNIT Supply Voltage V+ +9 V Output Pin Current I ±50 mA O Power Dissipation DMP8 : 300 P MSOP8 (TVSP8) : 320 mW D MSOP10 (TVSP10) : 320 Operating Temperature Range T -40 to +85 °C OPR Storage Temperature Range T -40 to +125 °C STG ■RECOMMENDED OPERATING CONDITIONS (Ta=25°C) PARAMETER SYMBOL MIN. TYP. MAX. UNIT Operating Voltage V+ 2.2 – 8 V Oscillator Timing Resistor R 30 47 120 kΩ T Oscillation Frequency f 300 700 1,000 kHz OSC ■ELECTRICAL CHARACTERISTICS (V+=3.3V, R =47kΩ, Ta=25°C) T PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Under Voltage Lockout Block ON Threshold Voltage V V+= L → H 1.9 2.0 2.1 V T_ON OFF Threshold Voltage V V+= H → L 1.8 1.9 2.0 V T_OFF Hysteresis Voltage V 60 100 – mV HYS Soft Start Block Soft Start Time T V → Duty=80% 8 16 24 ms SS T_ON Short Circuit Protection Block Input Threshold Voltage V FB Pin 0.95 1.00 1.05 V T_PC Charge Current I V =0V 1.5 2 2.5 µA CHG SCP Latch Mode V SCP Pin 0.95 1.00 1.05 V ON Threshold Voltage T_LA Latch Mode V SCP Pin 0.2 0.45 0.7 V OFF Threshold Voltage T_LAOFF Oscillator Block RT Pin Voltage V -5% 0.5 +5% V RT Oscillation Frequency f 630 700 770 kHz OSC Oscillate Supply Voltage f V+=2.2V to 8V – 1 – % Fluctuations DV Oscillate Temperature f Ta=-40°C to +85°C – 3 – % Fluctuations DT Ver.2012-08-03 -3-

NJU7600 ■ELECTRICAL CHARACTERISTICS (V+=3.3V, R =47kΩ, Ta=25°C) T PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Error Amplifier Block Reference Voltage V -1.5% 1.00 +1.5% V B Input Bias Current I -0.1 – 0.1 µA B Open Loop Gain A – 80 – dB V Gain Bandwidth Product G – 1 – MHz B I V =1V, V =0.9V 25 55 95 mA Output Source Current OM+_1 FB IN- I V =1V, V =0.9V, V+=2.2V 4 9 16 mA OM+_2 FB IN- Output Sink Current I V =1V, V =1.1V 0.10 0.16 0.22 mA OM- FB IN- PWM Comparate Block V Duty=0% 0.16 0.22 0.28 V Input Threshold Voltage T_0 V Duty=50% 0.44 0.5 0.56 V T_50 M D V =0.9V 85 90 95 % Maximum Duty Cycle AX UTY_1 FB M D V =0.9V, R =47kΩ 40 50 60 % AX UTY_2 FB DTC Output Block Output High Level R I =-20mA – 10 20 Ω ON Resistance OH O Output Low Level R I =+20mA – 5 10 Ω ON Resistance OL O General Characteristics Quiescent Current I R =Non Load – 800 1200 µA DD L -4- Ver.2012-08-03

NJU7600 ■ TYPICAL APPLICATIONS Step-Up Converter L SBD V+ V OUT C IN R2 C NJU7600 FET COUT 1 V+ OUT 8 R1 2 FB GND 7 C NF R T 3 IN- RT 6 RNF 4 SCP DTC 5 C R C SCP DTC S Flyback Converter SBD T V+ V OUT C IN R2 C NJU7600 FET COUT 1 V+ OUT 8 R1 2 FB GND 7 C NF RT R 3 IN- RT 6 NF 4 SCP DTC 5 C R C SCP DTC S Ver.2012-08-03 -5-

NJU7600 ■TYPICAL CHARACTERISTICS Oscillation Frequency vs. Timing Resistance Maximum Duty Cycle vs. Oscillator Frequency (V+=3.3V, Ta=25oC) (V+=3.3V, Ta=25oC) 1000 100 ) z H k ( e OSC Cycl%) 95 ncy f Duty (Y_1 que um DUT90 e m X Fr xiMA on Ma 85 ati cill Os 100 80 10 100 100 1000 Timing Resistance R (kΩ) Oscillator Frequency f (kHz) T OSC Duty Cycle vs. R Oscillation Frequency vs. Operating Voltage DTC (R =47kΩ, Ta=25oC) (V+=3.3V, R =47kΩ, Ta=25oC) z) 740 T 100 T H k ( c %) 80 s cy fo 720 (UTY 60 n D e X qu 700 MA n Fre ycle 40 atio 680 y C 20 cill Dut s O 0 660 0 20 40 60 80 100 0 2 4 6 8 10 Dead Time Control Resistance R (kΩ) Operating Voltage V+ (V) DTC Reference Voltage vs. Operating Voltage Quiescent Current vs. Operating Voltage (Ta=25oC) (R =47kΩ, R =Non Load, Ta=25oC) 1.004 1400 T L V) A) ( µ 1200 V B1.002 (D ge nt ID 1000 a e 800 ce Volt 1 nt Curr 600 n e e c 400 Refer 0.998 Quies 200 0.996 0 0 2 4 6 8 10 0 2 4 6 8 10 Operating Voltage V+ (V) Operating Voltage V+ (V) -6- Ver.2012-08-03

NJU7600 ■TYPICAL CHARACTERISTICS Error Amplifier Block Voltage Gain, Phase vs. Frequency (V+=3.3V, Gain=40dB, Ta=25 oC) 60 180 ) B d v ( 45 Phase 135eg) A d Gain 30 Gain 90 e (Φ e as g h a P olt 15 45 V 0 0 0.1 1 10 100 1000 10000 Frequency f (kHz) Output Block Output Block Output High Level ON Resistance Output Low Level ON Resistance vs. Temperature (Io=-20mA) vs. Temperature (Io=+20mA) e 14 e 14 c c an V+=1.95V an st 12 st 12 esi esi V+=1.95V R 10 R 10 N N O)Ω 8 V+=3.3V O)Ω 8 vel (H vel (L V+=3.3V e O6 e O6 LR LR h w Hig 4 Lo 4 ut 2 V+=8V ut 2 p p ut ut V+=8V O 0 O 0 -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Ambient Temperature Ta (oC) Error Amplifier Block Error Amplifier Block Output Source Current vs. Temperature Output Sink Current vs. Temperature (V =1V, V =0.9V) (V =1V, V =1.1V) )1000 FB IN- 0.2 FB IN- A ) m A ( m OM+ V+=8V (M-0.15 ent I 100 nt IO V+=1.95V, 3.3V, 8V r e ur rr 0.1 C u ce V+=3.3V k C r 10 n ou Si 0.05 ut S V+=1.95V put p ut ut O O 1 0 -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Ambient Temperature Ta (oC) Ver.2012-08-03 -7-

NJU7600 ■TYPICAL CHARACTERISTICS Soft Start Time vs. Temperature Reference Voltage vs. Temperature (V+=3.3V) (V+=3.3V) 24 1.01 s) 22 V) m ( s ( 20 V B1.005 Ts 18 e e ag m 16 olt 1 Ti V art 14 ce St 12 en 0.995 Soft 10 efer R 8 0.99 -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Ambient Temperature Ta (oC) Oscillator Frequency vs. Temperature Muximum Duty Cycle vs. Temperature (V+=3.3V, R =47kΩ) (V+=3.3V) 760 T 100 ) z H (kC 740 cle 90 S y M D cy fO 720 uty C (%) 80 AX UTY_1 uen 700 m DDUTY70 eq u X ator Fr 666800 MuximMA5600 MAXDUTY_2 cill s O 640 40 -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Ambient Temperature Ta (oC) Quiescent Current vs. Temperature Under Voltage Lockout Block vs. Temperature (V+=3.3V, R =47kΩ) 2.06 1000 T ) A V) 2.02 µ 800 e ( V (D oltag 1.98 T_ON ent ID 600 V r r hold 1.94 nt Cu 400 Thres 1.9 VT_OFF uiesce 200 Q 1.86 0 -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) Ambient Temperature Ta (oC) -8- Ver.2012-08-03

NJU7600 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. Ver.2012-08-03 -9-