CAT.No.TU074 SEP.2000 5V Stepping Down DC to DC Converter Power IC MD1620F Converter ICE ff ic ie n c y n w o D g in p d H ig h trol Step 2A PWM ConH ig h O u t p u t P o w e r a nd h ig h f u n c t io n in It a c h ie v e s h ig h p e r f o r m a n c e a n in t e g r a t in g ckage Compact pa Summary MD1620F is a non-isolated, PWM control stepping down DC- DC converter power IC including main MOSFET switch and free wheel SBD inside. It has maximum 10W ( 5V 2A ) output power and high efficiency in wide range. It also has wide input voltage range ( 12- 57V ) . Its package is compact surface mount type and it is possible to design DC to DC converter with fewer external components and smaller mounting area. Feature Input Voltage Range 12-57V Maximum Output Current 2A Included main MOSFET switch and free wheel SBD Fixed Frequency 250kHz PWM Control Over Current Protection Function Low Input Voltage Protection Function ( ULVO) Thermal Shut Down Function Recruit Ikebukuro Bldg., 13-23, 1-chome, Minami Ikebukuro, Toshima-ku, Tokyo 171-0022, Japan Phone: Tokyo(03)5951-8106 Fax :(03)5951-8089 Block Diagram Vref Vcc Vboot VB VG VDD 26 5 6 23 22 TAB2 BOOT reference Vref=11V Driver Vref=Vout+10V UVLO START =11.3V STOP =10.8V reference Vref=5V + - 5% Main Switch MOS OFF TSD 100 C driver 150 C Error amp TAB1 PWM Comp - VOUT 5.0VF/B Q 2.5V 3V R S 1V OSC f=250kHz 25 28 CLM Vth= 0.1~0.2V 27 CHOUT amp- 1 Application Example INPUT 12~57V Vboot VB VOUT VDD VCC 2 3 S/S F/B OCL- OCL+ ampOUT 4 24 8~11 GND P.GND Pin Layout OUTPUT 5V MD1620F OCL+ S/S : 1 F/B OCL- : 2 OCL+ : 3 GND : 4 Vcc : 5 Vboot : 6 N/C : 7 28 : amp27 : ampOUT 26 : Vref 25 : CHOUT 24 : GND 23 : VB 22 : VG amp OUT F/B OCLamp- VOUT : TAB1 TAB2 : VDD CHOUT GND S/S GND P.GND GND P.GND : 8 P.GND : 9 P.GND : 10 P.GND : 11 N/C : 12 N/C : 13 N/C : 14 21 : N/C 20 : N/C 19 : N/C 18 : N/C 17 : N/C 16 : N/C 15 : N/C Absolute Maximum Rating ( Ta = 25 ) Item Power Supply Voltage Output MOS Input Voltage Output Current ( A V E ) Output Current ( P E A K ) Storage Temperature Junction Temperature Symbol V IN V DD I OUT ave I OUT peak Tstg Tj Electrical Characteristics ( Ta = 25 Item HighsideMOS Drain-Source Voltage HighsideMOS Zero Gate Voltage Drain Current HighsideMOS Static Drain-Source On-state Resistance HighsideMOS Source-Drain Diode Forward Voltage LowSideSBD Maximum Reverse Voltage LowSideSBD Forward Voltage LowSideSBD Reverse Current Start up Voltage Stopping Voltage Start - Stop Hysteresis Current Consumption ( In Operation ) BOOT terminal voltage Internal voltage reference Internal oscillation frequency Over current threshold vol SoftStart terminal current Thermal Shut Down Operation Temp Rating 60 60 2 3 -40 ~ 150 150 Unit V V A A C C ) Symbol Condition MIN TYP MAX Unit Vdss ID = 1mA,VGS = 0V 60 - - V Idss VDS = 60V,VGS = 0V - - 10 Ron ID = 1.2A,VGS = 4V - 270 550 VSD IS = 1.2A,VDS = 0V - - 1.5 V VRM - 60 - - V VF IF = 1.2A - - 0.58 V IR VR = VRM - - 2.5 mA Vcc_start Vcc_stop Vcc_hys Icc Vboot Vref fosc Vth_OCL IS/S T_TSD Vcc= 12~ 57V Vcc= 12~ 57V Vcc= 12~ 57V Vcc= 48V Vcc= 48V Vcc= 48V - 10.5 10 10 4.75 212.5 0.162 -20 - 11.25 10.75 0.5 11 11 5 250 0.19 -12.5 150 11.9 11.5 13 12.5 5.25 287.5 0.218 -5 - V V V mA V V kHz V C Recommended Operation Conditions Item Input Voltage Operation Temp Recommerded Value 12 ~ 57 -10 ~ 80 Unit V C 14 + 0.1 8.8 - Lot No. 1 + 0.8 -0.2 0~10 TAB1 Type No. +0.1 15 0.25 -0.05 TAB2 12.23 - Company Name 28 + 0.3 Outline Dimensions Detail of A Portion S = 12 / 1 21.5MAX + 20.7 -0.1 1.0 7.0 + 0.4 -0.1 + -0.2 2.4 0.1- + 5.4-0.1 0.15 + 0.1 2.3 + -0.1 A Portion 0.2 M Unit : mm The level of quality of our products shown in this catalog is intended for use in standard applications requiring ordinary reliability. In the case these products are to be used in equipment or devices for special or specific applications requiring extremely high levels of quality and reliability in which failure or malfunction of a product may directly affect human life or health, always make sure to obtain confirmation by contacting our firm in advance. The quality levels of our products are classified in the manner shown below, Standard Applications Computers, OA and other office equipment, communication terminal equipment, measuring instruments, AV equipment, amusement equipment, home appliances, machine tools, personal equipment, industrial robots, etc. Special Applications Transportation equipment (automotive, marine, etc.), trunk line communication equipment, traffic signal equipment, fire prevention/anti-theft equipment, various safety devices, health care equipment, etc. Specific Applications Nuclear power control systems, aeronautical equipment, aerospace equipment, submarine relay equipment, devices and systems for preserving life, etc. Although efforts are constantly made to improve quality and reliability, please select a product after careful examination so that personal injury, accidents and social damage can be prevented as a result of deploying measures such as a redundant design, designs that prevent the spreading of fire, designs that prevent malfunctions and so forth while taking safety into consideration as necessary. * All specifications are subject to change without notice. SHINDENGEN ELECTRIC MFG. CO., LTD. RECRUIT Ikebukuro Bldg., 13-23, 1-chome Minami-Ikebukuro, Toshima-ku, Tokyo 171-0022 Japan Facsimile : 03-5951-8090 Phone : 03-5951-8106 2K920 (NP)