NJM2344 Datasheet | New Japan Radio

DESCRIPTION The NJM2344 is a general purpose PWM DC/DC converter IC configurable for step-up, step-down and inverting applications. An internal 1.5A power transistor, a pulse-by pulse current limit and 1% precision reference make the NJM2344 suitable for a wide range of voltage converter needs. The NJM2344 features a standby function that can be used for both power saving and safety operation. - PACKAGE OUTLINE NJM2344D NJM2344M - FEATURES - Operating Voltage 3.0V to 40V - Wide Oscillator Frequency 1k Hz to 150k Hz - Precision Reference Voltage Vth=1.25V ± 1% - Internal High Power Transistor 1.5A max. - Internal Over Current Limit Circuit - PWM switching control - Standby Function 9µA typ. - Bipolar Technology - Package Outline NJM2344D : DIP8 NJM2344M : DMP8 - PIN CONFIGURATION 1 .. 2 3 4 8 7 6 5 - BLOCK DIAGRAM PIN FUNCTION 1. CS 2. ES 3. CT 4. GND 5. IN6. V+ 7. ON/OFF 8. SI Q R PWM Logic 1.5A 160Ω S ON/OFF High :ON Low :OFF (Standby) NJM2344D NJM2344M OSC Block MAX ON Duty 9:1 CT 3 Error AMP Vref 1.25V Ipk Sense 300m V 6 PWM P V+ 4 Buffer IN- Ver.2009-10-13 -1- - ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL Maximum Supply Voltage V+ parator Input Voltage VIR ON/OFF Terminal Voltage VON/OFF Output Driver Voltage VC(driver) Output Switch Voltage VSW Output Driver Current IC(driver) Output Switch Current ISW Power Dissipation Operating Temperature Range Storage Temperature Range PD Topr Tstg MAXIMUM RATINGS 40 -0.3 ~ 40 (note) -0.3 ~ 40 (note) 40 40 100 1.5 DIP8 875 DMP8 580 (- 1) 750 (- 2) -40 ~ +85 -50 ~ +150 UNIT V V V V m A A m W °C °C (note) When supply voltage is less than 40V, the absolute maximum input voltage is equal to the supply voltage. (- 1) At on PC board : 114.3mm × 76.2mm × 1.6mm(2 layer FR-4) : Conform to EIA/JEDEC (- 2) At on PC board : 114.3mm × 76.2mm × 1.6mm(4 layer FR-4) : Conform to EIA/JEDEC - POWER DISSIPATION vs. AMBIENT TEMPERATURE Power Dissipation vs. Ambient Temperature 1000 (m W) 800...