NJM3524 SWITCHING REGULATOR CONTROL CIRCUIT GENERAL DESCRIPTION PACKAGE OUTLINE The NJM3524 of regulating pulse width modulators contains all of the control circuitry necessary to implement switching regulators of either polarity converters and voltage doublers, as well as other power control applications. This device includes a 5V voltage regulator capable of supplying up to 50mA to external circuitry a control amplifier, an oscillator, a pulse width modulator, a phase splitting flip-flop, dual alternating output NJM3524D NJM3524M switch transistors, and current limiting and shut-down circuitry. Both the regulator output transistor and each output switch are internally current limited and, to limit junction temperature, an internal thermal shut-down circuit is employed. NJM3524V FEATURES Operating Voltage (8V to 40V) Complete PWM Power Control Circuitry Uncommitted Outputs for Single-Ended or Pash-Pull Appli Cutions Low Stand by Current Package Outline DIP16, DMP16, SSOP16 Bipolar Technology RECOMMEND OPERATING CONDITION PIN CONFIGURATION Parameter Symbol Min. Typ. Max. Unit + Operating Voltage V 8 20 40 V Output Reference Current I 0 - 50 mA REF Timing Resistance R 1.8 - 100 k T Timing Capacitor C - 0.1 F T Operating Temperature Range T -20 25 75 C opr EQUIVALENT CIRCUIT Ver.2003-07-18 -1- NJM3524 ABSOLUTE MAXIMUM RATINGS (T = 25C) a PARAMETER SYMBOL RATINGS UNIT + Supply Voltage V 40 V Output Current I 100 mA O Output Reference Current I 50 mA REF (DIP16) 700 mW Power Dissipation P D (DMP16) 300 mW Operating Temperature Range T -20 to + 75 C opr Storage Temperature Range T -40 to +125 C stg ELECTRICAL CHARACTERISTICS + Electrical characteristics over recommended operating free-air temperature range, V = 20V, f = 20kHz (unless otherwise noted). Reference Section PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX.UNIT + Output Voltage V V = 20v 4.6 5.0 5.4 V REF + + Line Regulation V -V V = 8 to 40V - 10 30 mV REF + Load Regulation V -I V = 10V, I = 0 to 20mA - 20 50 mV REF REF REF + Ripple Rejection RR V = 20V, f = 120Hz - 66 - dB Temperature Coefficient T. C. Ta = -20 to +75C - -1 - mV/C Short Circuit Output Current I - 100 - mA REF S Error Amplifier Section Input Offset Voltage V V = 2.5V - 2 10 mV IO IC Input Bias Current I (1) V = 2.5V - 2 10 A B IC Open Loop Voltage Gain A 60 80 - dB V Input Common Mode Voltage Range V T = 25C 1.8 - 3.4 V CM a Common Mode Rejection Ratio CMR - 70 - dB Unity Gain Bandwidth - - 3 - MHz Output Voltage Swing - 0.5 - 3.8 V Oscillator Section Frequency f C = 0.01F, R = 2k - 30 - kHz OSC T T + Frequency Change with Voltage - V = 8 to 40V - - 1 % Frequency Change with Temperature - T = -20 to +75C - - 3 % a Output Pulse Width (Pin 3) - C = 0.01F - 0.5 - S T Output Amplitude (Pin 3) - - 3.5 - V Ver.2003-07-18 - 2 -