| NJM2360A HIGH PRECISION DC/DC CONVERTOR CONTROL IC m GENERAL DESCRIPTION @ PACKAGE OUTLINE The NJM2360A is a control circuit containing the primary func- tions required for DC to DC CONVERTOR. This device consist of high precision reference, comparator controlled duty cycle oscillator with an active current limit circuit, GA driver and high current output switch. This IC was speciffically designed to be incorporated in step-up, step-down and inverting applications with a minimum number of exter- nal components. This IC is desiged to be +5% output voltage by using precision 1% resistance on external detected resistance. NJM2360A0 NJM2960AM = FEATURES @ Operating Voltage (2.5V~40V) @ Precision +2% Reference e@ Low Standby Current @ Output Voltage Vor 1.25~40V e@ Oscillator Frequency fosc 100Hz ~ 100kHz @ Output Switch Current to 1.5A @ Package Outline DIP8, DMP8& @ Bipolar Technology = PIN COFIGURATION Oo PIN FUNCTION 10 8 1. Cs 2c 7 2. Es 3. Cr 3 6 4. GND 4 5 5. INVin q A 6. Vt NJM236040 ae WJM2360AM = BLOCK DIAGRAM Switch Coltector| | Switch 2 Emitter Timing Capacitor 3 GND [| 3 Drive Collector 7] Ix Sense on 5] Comparator Inverting Input New Japan Radio Co.thd. 6-109NJM2360A = ABSOLUTE MAXIMUM RATINGS (Ta=25T) PARAMETER SYMBOL RATINGS UNIT Supply Voltage vv 40 v Comparator Input Voltage Range Vir 0.3~40 v (DIP8) 875 mW Power Dissipation Pp (DMP8) 700 (note) mW Switch Current Isw 15 A Operating Temperature Range Topr ~20~+75 c Storage Temperature Range Tstg ~ 40~+150 Cc (note) At on PC board @ ELECTRICAL CHARACTERISTICS @ DC Characteristics (V*=5V, Ta=25) PARAMETER SYMBOL TEST CONDITION MIN. | TYP. | MAX.| UNIT Operating Current Icc SVS V*S40V, Cr=0.001 nF _ 2.4 35 | mA Sr = vt, IN Vin > Vin, Es=GND Oscillator Charge Current Teng SVSV+S40V 20 | 35 50 | wA Discharge Current ldischg S5VSVt*S40V 150 | 200 250 | vA Voltage Swing Vosc _ 0.5 Vp-p Discharge to Charge Current Ratio Laischg/Teng | Si= Vt 6 _ Peak Current Sense Voltage VIPK (sense) Ichg = Taischg 250 | 300 350 | mV Output Switch (Note 1) Saturation Voltage | Vcetsat) Darlington Connection (Cs=Cp) 1.0 1.3 v Isw=1.0A Saturation Voltage 2 VecEtsat) 2 Isw=1.0A, Ictdrivery = SOMA _ 05 | O07 | Vv (Forced 8520) DC Current Gain hee Isw=1.0A, VcE=5.0V 35 4120 _ _ Collector Off State Current Iccom Vce=40V - 1 10 | nd Comparator Threshold Voltage Vth 1.225] 1.250) 1.275] Vv Input Bias Current lip Vin=OV 140 400 nA Note | - Output switch tests are performed under pulsed conditions to minimize power dissipation. 6-110 New Japan Radio Co.Ltd.