NJM2360A HIGH PRECISION DC/DC CONVERTER CONTROL IC GENERAL DESCRIPTION The NJM2360A is a control circuit containing the primary functions required for DC to DC CONVERTOR. This device consist of high precision reference, comparator controlled duty cycle oscillator with an active current limit circuit, driver and high current output switch. This IC was specifically designed to be incorporated in step-up, step-down and inverting applications with a minimum number of external components. This IC is designed to be 5% output voltage by using precision 1% resistance on external detected resistance. PACKAGE OUTLINE NJM2360AD NJM2360AM FEATURES * Precision Reference 1.25V2% * Output Switch Current 1.5A (MAX) * Operating Voltage 2.5V* to 40V * Internal Over Current Limit Circuit * Supply Voltage V+ 2.5V* to 40V * Output Voltage VOR 1.25V to 40V * Oscillator Frequency fOSC 100Hz to 100kHz * Package Outline DIP8, DMP8 *Ta =25C. At low temperature, the minimum voltage is 3.0V. PIN CONFIGURATION NJM2360AD NJM2360AM BLOCK DIAGRAM Ver.2007-06-08 -1- NJM2360A ABSOLUTE MAXIMUM RATINGS PARAMETER (Ta = 25C) SYMBOL RATINGS UNIT Supply Voltage V+ 40 V Comparator Input Voltage Range VIR -0.3 to 40 V Power Dissipation PD (DIP8) 875 (DMP8) 750 (note1) mW mW Switch Current ISW 1.5 A Operating Temperature Range Topr -40 to + 85 C Storage Temperature Range Tstg -40 to +150 C (note 1) At on PC board ELECTRICAL CHARACTERISTICS DC Characteristics (V+ = 5V, Ta = 25C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT - 2.4 3.5 mA 20 150 250 35 200 0.5 6 300 50 250 350 A A VP-P mV - 1.0 1.3 V - 0.5 0.7 V 35 - 120 10 - nA 1.225 - 1.250 40 1.275 400 V nA + Operating Current ICC 5V V 40V, CT = 0.001F + S1 = V , INVIN > Vth, ES = GND Oscillator Charge Current Discharge Current Voltage Swing Discharge to Charge Current Ratio Peak Current Sense Voltage Ichg Idischg VOSC Idischg/Ichg VIPK(sense) 5V V+ 40V 5V V+ 40V SI = V+ Ichg = Idischg Output Switch (Note 2) hFE IC(off) Darlington Connection (CS = CD) ISW = 1.0A ISW = 1.0A, IC (driver) = 50mA (Forced =20) ISW = 1.0A, VCE = 5.0V VCE = 40V Vth IIB VIN = OV Saturation Voltage 1 VCE(sat) 1 Saturation Voltage 2 VCE(sat) 2 DC Current Gain Collector Off-State Current Comparator Threshold Voltage Input Bias Current Note 2 : Output switch tests are performed under pulsed conditions to minimize power dissipation. [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. -2- Ver.2007-06-08