NJU7261 Series C-MOS STEP-UP SWITCHING REGULATOR GENERAL DESCRIPTION PACKAGE OUTLINE The NJU7261 series is a C-MOS step-up switching regulator which contains accurate voltage reference, error amplifier, CR oscillator, control circuit, switching transistor, diode and resistor. The stand-by function is effective for low power consumption. The regulation voltage is fixed by internal circuits and the following line-up of different output voltages version are available. NJU7261U1 - ** This series is suitable for portable equipment s or battery operated items because of its small packaged outline, low operating voltage and current. FEATURES PIN CONFIGULATION Low Operating Voltage (1.0V min.) Low Operating Current (5.0A typ. / V = 3.0V) OUT Low Stand-by Current (0.2A max. / V = 3.0V) OUT High Precision Output Voltage (3% max.) Wide Operating Voltage Range Stand-by Function CR Oscillator On-chip Diode On-chip Package Outline SOT89-5 C-MOS Technology LINE-UP EQUIVALENT CIRCUIT Output Voltage (V) Line-Up 3.0 NJU7261U1-30 3.3 NJU7261U1-33 5.0 NJU7261U1-50 TERMINAL DESCRIPTION No. Term. Name I/O FUNCTION 1 CONT I External Inductor Connect Terminal 2 GND POWER Power Source (GND) Strobe Terminal : or OPENNormal Operation (step-up) 3 STB I Standp-By Operation 4 V POWER Power Source (+) IN 5 V O Step-up Output Terminal OUT Ver.2010-04-14 - 1 - NJU7261 Series ABSOLUTE MAXIMUM RATINGS (T = 25C) a PARAMETER SYMBOL RATINGS UNIT Input Voltage V 10 V IN CONT Input Voltage V GND-0.3 V 10 V CONT CONT Strobe Input Voltage V GND-0.3 V V V STB STB IN Output Voltage V GND-0.3 V 10 V OUT OUT Power Dissipation P 300 mW D Operating Temperature Range T -25 to + 75 C opr Storage Temperature Range T -40 to +125 C stg Note1) When a coil used. This IC of V possible over the absolute maximum ratings. Consequently please conduct CONT enough to test. Note2) The CONT input voltage (V ) should be inspected at the real application circuit, as some kinds of coils make CONT the CONT input voltage exceed the Absolute Maximum Rating of the V . CONT ELECTRICAL CHARACTERISTICS +3.0V Version (T = 25C) a NORM MEASUREMENT PARAMETER SYMBOL CONDITION UNIT CIRCUIT MIN. TYP. MAX. Input Voltage V - - 5.0 V 1 IN Start Voltage V NO LOAD - - 1.0 V 1 START Oscillator Freq. f V = 1.5V 20 30 50 kHz 2 OSC IN Output Voltage V V = 1.5V, I = 20mA 2.91 3.0 3.09 V 1 OUT IN OUT V = 1.5V to 2.0V IN Input Stability V - 30 100 mV 1 OUT1 I = 20mA OUT V = 1.5V IN Load Stability V - 30 100 mV 1 OUT2 I = 10A to 25mA OUT Operating Current I V = V = 1.5V, NO LOAD - 5.0 10 A 3 SS IN STB V = 1.5V IN Stand-by Current I - - 0.2 A 4 Q V = 0V, NO LOAD STB Switching Current I V = 0.2V - 250 - mA - SI DS H level V V = 1.5V 1.0 - - V 5 STB Terminal STBH IN Input Voltage L level V V = 1.5V - - 0.4 V 5 STBL IN I V = 1.5V, V = 1.0V - 15 30 A 6 STBH1 IN STB H level I V = 1.5V, V = 1.5V - 0.1 - A 6 STBH2 IN STB STB Terminal Input Current I V = 1.5V, V = 0.4V - 15 30 A 6 STBL1 IN STB L level I V = 1.5V, V = 0V - 0.1 - A 6 STBL2 IN STB Ver.2010-04-14 - 2 -