Doc No. TA4-EA-05266 Revision. 4 AN33012UA V = 5 to 25 V, V = 1.2 to 22 V, 2-channel DC-DC Controller IN OUT IC with Step down regulation FEATURES DESCRIPTION 2-channel DC-DC Step Down Regulator Circuit that AN33012UA is 2-channnel DC-DC Controller IC with employs Voltage Mode Switching Control System Step down Regulation that employs the voltage mode switching control system, and drives P-channel external Internal reference voltage is within 2% accuracy power MOSFET stages. Input Voltage Range : VCC: 5 V ~ 25 V This IC can be operated with wide input voltage range Adjustable Output Voltage Range with external and is build in several protection functions, so this IC can Resistor : 1.2 V ~ 22 V (Note) provide high reliability power supply system. Adjustable Switching Frequency with external Since it is possible to use up to 2 MHz switching Resistor : 200 kHz ~ 2 MHz frequency and output current is adjustable by P-channel Standby mode consumes less than 1 A current external power MOSFET, this IC realizes downsizing of Output over voltage protection function (OVP1) set and reducing in the number of external parts. Output ground short protection function Output voltage is adjustable by user. Input over voltage protection (OVP2) function Output current is dependent on external FET. Over current protection with adjustable threshold. Under voltage lockout function (UVLO) APPLICATIONS Thermal Shut Down function High Input Voltage Power Systems such as Adjustable soft-start function Car-Audio system Channel-to-channel Phase reversal function Car-Navigation system SSOP024-P-0300F OA Equipment ( Size : 8.1 mm X 7.8 mm, 0.65 mm pitch ), Home Appliances etc. 24pin Plastic Shrink Small Outline Package (SSOP Type) (Note) F=490kHz. Please refer Page 10 SIMPLIFIED APPLICATION PVIN EFFICIENCY CURVE 100 Pull-up 1.0F 22F3 90 80 200k VREG EN2 EN1 70 FLAG VCC S1 60 VCC S2 11m RS1 11m 50 LX1 RS2 VCC=6V 40 (ECH8035 LX2 VCC=12V HSD1 30 (ECH8035 VCC=25V 0.1F AN33012UA HSD2 SS1 0.1F 20 DC-DC 0.1F DC-DC 10H SS2 10H OUT2 TL OUT1 10 0.1F SYNC CT 0 COMP1 0 200 400 600 800 1000 1200 1400 1600 1800 2000 COMP2 22F 22F SGND TL CTRL 2.2nF Iload (mA) 2.2nF FB2 RT PGND FB1 27pF 7.5k 27pF 7.5k 130k 7.5k 30k 30k 7.5k Condition ) 470pF 1.5k 1.5k 470pF Vin = 6 , 12 , 25 V, Vout = 5 V, Notes) This application circuit is an example. The operation LX1/LX2 : ECH8035 (SANYO) of mass production set is not guaranteed. You should Lo = 10 H, Co = 22 F, Frequency = 490 kHz perform enough evaluation and verification on the design of mass production set. You are fully responsible for the incorporation of the above application circuit and information in the design of your equipment. Established : 2010-08-05 Page 1 of 19 Revised : 2013-06-28 Efficiency (%)Doc No. TA4-EA-05266 Revision. 4 AN33012UA ABSOLUTE MAXIMUM RATINGS Note Parameter Symbol Rating Unit s Supply voltage V 50 V *1 CC Operating free-air temperature T 40 to + 85 C *2 opr Operating junction temperature T 40 to + 150 C *2 j Storage temperature T 55 to + 150 C *2 stg V ,V , *1 CC S1 RS1 (V 5.5) to ( + 0.3) V CC VCC V ,V *3 CC S2 RS2 *1 Input Voltage Range V ,V 0.3 to (V + 0.3) V EN1 EN2 CC *4 V , V , V , V , RT TL SS1 SS2 0.3 to 5.5 V *1 V ,V ,V ,V FB1 FB2 TL CTRL SYNC V , V , V , V 0.3 to 5.5 V *1 FLAG COMP1 COMP2 CT Output Voltage Range *1 V , V (V 5.5) to ( + 0.3) V HSD1 HSD2 CC VCC *3 V (Human Body Model) 2 kV HBM ESD V (Machine Model) 200 V MM Notes) Do not apply external currents and voltages to any pin not specifically mentioned. This product may sustain permanent damage if subjected to conditions higher than the above stated absolute maximum rating. This rating is the maximum rating and device operating at this range is not guaranteeable as it is higher than our stated recommended operating range. When subjected under the absolute maximum rating for a long time, the reliability of the product may be affected. Vcc is voltage for VCC. *1:The values under the condition not exceeding the above absolute maximum ratings and the power dissipation. *2:Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25 C. *3:(Vcc 5.5) V must not be exceeded 0.3 V, and (Vcc + 0.3) V must not be exceeded 50 V *4:(Vcc + 0.3) V must not be exceeded 50 V. POWER DISSIPATION RATING PD PD PACKAGE j-a j-c ( Ta = 25 C) ( Ta = 85 C) 24 Pin Plastic Shrink Small Outline 135.1 C / W 11.8 C / W 0.925 W 0.481 W *1 Package (SSOP Type) Note). For the actual usage, please refer to the PD-Ta characteristics diagram in the package specification, follow the power supply voltage, load and ambient temperature conditions to ensure that there is enough margin and the thermal design does not exceed the allowable value. *1:Glass Epoxy Substrate(1 Layer) Glass-Epoxy: 50 X 50 X 0.8t(mm) CAUTION Although this has limited built-in ESD protection circuit, but permanent damage may occur on it. Therefore, proper ESD precautions are recommended to avoid electrostatic damage to the MOS gates Established : 2010-08-05 Page 2 of 19 Revised : 2013-06-28