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| NJU7261 Series C-MOS STEP-UP SWITCHING REGULATOR GENERAL DESCRIPTION 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. This series is suitable for portable equipment's or battery operated items because of its small packaged outline, low operating voltage and current. FEATURES * Low Operating Voltage * Low Operating Current * Low Stand-by Current * High Precision Output Voltage * Wide Operating Voltage Range * Stand-by Function * CR Oscillator On-chip * Diode On-chip * Package Outline * C-MOS Technology LINE-UP Output Voltage (V) 3.0 3.3 4.5 5.0 Line-Up NJU7261U30 NJU7261U33 NJU7261U45 NJU7261U50 PACKAGE OUTLINE PRELIMINARY NJU7261UX PIN CONFIGULATION (1.0V min.) (5.0A typ. / VOUT = 3.0V) (0.2A max. / VOUT = 3.0V) (3% max.) SOT89-5 EQUIVALENT CIRCUIT TERMINAL DESCRIPTION No. 1 2 3 4 5 Term. Name CONT GND STB VIN VOUT I/O I POWER I POWER O FUNCTION External Inductor Connect Terminal Power Source (GND) Strobe Terminal : "H" or OPEN***Normal Operation (step-up) " L" ***Standp-By Operation Power Source (+) Step-up Output Terminal Ver.2003-07-18 -1- NJU7261 Series ABSOLUTE MAXIMUM RATINGS PARAMETER Input Voltage CONT Input Voltage Strobe Input Voltage Output Voltage Power Dissipation Operating Temperature Range Storage Temperature Range SYMBOL VIN VCONT VSTB VOUT PD Topr Tstg RATINGS 10 GND-0.3 VCONT 10 GND-0.3 VSTB VIN GND-0.3 VOUT 10 300 -25 to + 75 -40 to +125 (Ta = 25C) UNIT V V V V mW C C Note1) When a coil used. This IC of VCONT possible over the absolute maximum ratings. Consequently please conduct enough to test. Note2) The CONT input voltage (VCONT) should be inspected at the real application circuit, as some kinds of coils make the CONT input voltage exceed the Absolute Maximum Rating of the VCONT. ELECTRICAL CHARACTERISTICS +3.0V Version PARAMETER Input Voltage Start Voltage Oscillator Freq. Output Voltage Input Stability Load Stability Operating Current Stand-by Current Switching Current STB Terminal Input Voltage H level L level H level L level SYMBOL VIN VSTART fOSC VOUT VOUT1 VOUT2 ISS IQ ISI VSTBH VSTBL ISTBH1 ISTBH2 ISTBL1 ISTBL2 NO LOAD VIN = 1.5V VIN = 1.5V, IOUT = 20mA VIN = 1.5V to 2.0V IOUT = 20mA VIN = 1.5V IOUT = 10A to 25mA VIN = VSTB = 1.5V, NO LOAD VIN = 1.5V VSTB = 0V, NO LOAD VDS = 0.2V VIN = 1.5V VIN = 1.5V VIN = 1.5V, VSTB = 1.0V VIN = 1.5V, VSTB = 1.5V VIN = 1.5V, VSTB = 0.4V VIN = 1.5V, VSTB = 0V CONDITION NORM MIN. 20 2.91 1.0 TYP. 30 3.0 30 30 5.0 250 15 0.1 15 0.1 MAX. 5.0 1.0 50 3.09 100 100 10 0.2 0.4 30 30 UNIT V V kHz V mV mV A A mA V V A A A A (Ta = 25C) MEASUREMENT CIRCUIT 1 1 2 1 1 1 3 4 5 5 6 6 6 6 STB Terminal Input Current -2- Ver.2003-07-18 NJU7261 Series +3.3V Version PARAMETER Input Voltage Start Voltage Oscillator Freq. Output Voltage Input Stability Load Stability Operating Current Stand-by Current Switching Current STB Terminal Input Voltage H level L level H level L level SYMBOL VIN VSTART fOSC VOUT VOUT1 VOUT2 ISS IQ ISI VSTBH VSTBL ISTBH1 ISTBH2 ISTBL1 ISTBL2 NO LOAD VIN = 1.5V VIN = 1.5V, IOUT = 20mA VIN = 1.5V to 3.0V IOUT = 20mA VIN = 1.5V IOUT = 10A to 25mA VIN = VSTB = 1.5V, NO LOAD VIN = 1.5V VSTB = 0V, NO LOAD VDS = 0.2V VIN = 1.5V VIN = 1.5V VIN = 1.5V, VSTB = 1.0V VIN = 1.5V, VSTB = 1.5V VIN = 1.5V, VSTB = 0.4V VIN = 1.5V, VSTB = 0V CONDITION NORM MIN. 20 3.20 1.0 TYP. 30 3.30 30 30 5 250 15 0.1 15 0.1 MAX. 5.0 1.0 50 3.40 100 100 10 0.2 0.4 30 30 UNIT V V kHz V mV mV A A mA V V A A A A (Ta = 25C) MEASUREMENT CIRCUIT 1 1 2 1 1 1 3 4 5 5 6 6 6 6 STB Terminal Input Current +4.5V Version PARAMETER Input Voltage Start Voltage Oscillator Freq. Output Voltage Input Stability Load Stability Operating Current Stand-by Current Switching Current STB Terminal Input Voltage H level L level H level L level SYMBOL VIN VSTART fOSC VOUT VOUT1 VOUT2 ISS IQ ISI VSTBH VSTBL ISTBH1 ISTBH2 ISTBL1 ISTBL2 NO LOAD VIN = 3.0V VIN = 3.0V, IOUT = 20mA VIN = 2.0V to 3.0V IOUT = 20mA VIN = 3.0V IOUT = 10A to 25mA VIN = VSTB = 3.0V, NO LOAD VIN = 3.0V VSTB = 0V, NO LOAD VDS = 0.2V VIN = 3.0V VIN = 3.0V VIN = 3.0V, VSTB = 2.4V VIN = 3.0V, VSTB = 3.0V VIN = 3.0V, VSTB = 0.4V VIN = 3.0V, VSTB = 0V CONDITION NORM MIN. 20 4.36 2.4 TYP. 30 4.50 30 30 5 250 50 0.1 50 0.1 MAX. 4.5 1.0 50 4.64 100 100 15 0.2 0.4 100 100 UNIT V V kHz V mV mV A A mA V V A A A A (Ta = 25C) MEASUREMENT CIRCUIT 1 1 2 1 1 1 3 4 5 5 6 6 6 6 STB Terminal Input Current Ver.2003-07-18 -3- NJU7261 Series +5.0V Version PARAMETER Input Voltage Start Voltage Oscillator Freq. Output Voltage Input Stability Load Stability Operating Current Stand-by Current Switching Current STB Terminal Input Voltage H level L level H level L level SYMBOL VIN VSTART fOSC VOUT VOUT1 VOUT2 ISS IQ ISI VSTBH VSTBL ISTBH1 ISTBH2 ISTBL1 ISTBL2 NO LOAD VIN = 3.0V VIN = 3.0V, IOUT = 20mA VIN = 2.0V to 3.0V IOUT = 20mA VIN = 3.0V IOUT = 10A to 25mA VIN = VSTB = 3.0V, NO LOAD VIN = 3.0V VSTB = 0V, NO LOAD VDS = 0.2V VIN = 3.0V VIN = 3.0V VIN = 3.0V, VSTB = 2.4V VIN = 3.0V, VSTB = 3.0V VIN = 3.0V, VSTB = 0.4V VIN = 3.0V, VSTB = 0V CONDITION NORM MIN. 20 4.85 2.4 TYP. 30 5.0 30 30 5 250 50 0.1 50 0.1 MAX. 5.0 1.0 50 5.15 100 100 15 0.2 0.4 100 100 UNIT V V kHz V mV mV A A mA V V A A A A (Ta = 25C) MEASUREMENT CIRCUIT 1 1 2 1 1 1 3 4 5 5 6 6 6 6 STB Terminal Input Current -4- Ver.2003-07-18 NJU7261 Series MEASUREMENT CIRCUIT 1 (1) External Diode Type : "D1NS4" provided by SHINDENGEN (IF = 1A, VF = 0.55V) (2) (3) ISS = I1 + l2 x VOUT V2 Under the condition of V2 =VOUT + 1.0V Ver.2003-07-18 -5- NJU7261 Series MEASUREMENT CIRCUIT 2 (4) (5) (6) -6- Ver.2003-07-18 NJU7261 Series APPLICATION CIRCUIT Ver.2003-07-18 -7- NJU7261 Series TYPICAL CHARACTERISTIC Start Voltage vs. Temperature Internal Oscillator Operation : External D1NS4 Start Voltage vs. Temperature Internal Oscillator Operation : External D1NS4 Oscillation Frequency vs. Temperature Oscillation Frequency vs. Temperature [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. -8- Ver.2003-07-18 |
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