4R7 (1/2) Conformity to RoHS Directive SMD Inductors(Coils) For Power Line(Wound, Magnetic Shielded) VLF Series VLF4012S FEATURES SHAPES AND DIMENSIONS Miniature size Mount area: 3.6 3.8mm Low profile: 1.2mm max. height Generic use for portable DC to DC converter line. 3.80.2 1.2max. High magnetic shield construction should actualize high resolu- Dimensions in mm tion for EMC protection. Available for automatic mounting in tape and real package. The products contain no lead and also support lead-free RECOMMENDED PC BOARD PATTERN soldering. It is a product conforming to RoHS directive. 2.9 4.7 Dimensions in mm APPLICATIONS Power souce inductor for mobile devices such as mobile phones, HDDs, and DSCs ELECTRICAL CHARACTERISTICS DC resistance( ) Rated current(A) Inductance Inductance Test frequency Part No. Based on inductance Based on temperature (H) tolerance(%) (MHz) max. typ. change max. rise typ. VLF4012ST-1R0N1R9 1 30 1 0.054 0.045 2.7 1.9 VLF4012ST-2R2M1R3 2.2 20 1 0.12 0.097 1.7 1.3 VLF4012ST-3R3M1R1 3.3 20 1 0.16 0.13 1.5 1.1 VLF4012ST-4R7M1R0 4.7 20 1 0.19 0.16 1.4 1 VLF4012ST-6R8MR80 6.8 20 1 0.32 0.27 1 0.8 VLF4012ST-100MR65 10 20 1 0.49 0.41 0.9 0.65 Rated current: Value obtained when current flows and the temperature has risen to 40C or when DC current flows and the nominal value of inductance has fallen by 30%, whichever is smaller. Operating temperature range: 40 to +105C (Including self-temperature rise) TYPICAL ELECTRICAL CHARACTERISTICS INDUCTANCE vs. DC SUPERPOSITION CHARACTERISTICS VLF4012ST-1R0N1R9 VLF4012ST-2R2M1R3 2.5 1.2 1.0 2.0 0.8 1.5 0.6 1.0 0.4 0.5 0.2 0.0 0.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 ( ) ( ) DC current A DC current A Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and specific bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications. All specifications are subject to change without notice. 002-04 / 20080821 / e531 vlf4012s.fm ( ) Inductance H ( ) Inductance H 3.60.2 1.3(2/2) TYPICAL ELECTRICAL CHARACTERISTICS INDUCTANCE vs. DC SUPERPOSITION CHARACTERISTICS VLF4012ST-3R3M1R1 VLF4012ST-4R7M1R0 6 4.0 3.5 5 3.0 4 2.5 3 2.0 1.5 2 1.0 1 0.5 0 0.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 ( ) ( ) DC current A DC current A VLF4012ST-6R8MR80 VLF4012ST-100MR65 12 8 7 10 6 8 5 6 4 3 4 2 2 1 0 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 ( ) DC current A ( ) DC current A TEST CIRCUIT C=20,000F A L=0.1H 2 1 Sample 1: LCR meter 4285A f=1MHz 2: DC constant current All specifications are subject to change without notice. 002-04 / 20080821 / e531 vlf4012s.fm ( ) Inductance H ( ) Inductance H ( ) ( ) Inductance H Inductance H