TK11812

TK11812 DC-DC CONVERTER FEATURES s s s s s Miniature Package (SOT-23L) Low Start-up Voltage [0.6 V (typ.)] Few External Components Adjustable Output Voltage (1.5 to 15 V) Wide Input Voltage Range (0.6 to 14 V) APPLICATIONS s s s s s s s s Pagers Cassette Recorders Cordless Telephones Portable Instrumentation Radio Control Systems Mobile Radios Battery Operated Equipment Local Area Network (LAN) Receivers DESCRIPTION The TK11812 is a low power, low input voltage step-up DC-DC converter. This device can be set to an output of 1.5 to 15 V DC using two resistors. The output current is dependent upon the input voltage and ranges from 8 mA at 1.6 V to 24 mA at 3.5 V. The efficiency is over 80% for an output current of 4 mA to 32 mA with a 3.5 V input and 5 V output. The frequency of the built-in relaxation oscillator is set by external components. The internal voltage regulator provides a stable output voltage. Optimized Toko inductor components are available. The TK11812 is available in a miniature 6-pin SOT-23L surface mount package. BLOCK DIAGRAM VIN FB OSC TK11812 VIN 20 P FB GND FB OSC VOUT ORDERING INFORMATION VOUT TK11812M Tape/Reel Code OSCILLATOR Vref + FB TAPE/REEL CODE TL: Tape Left GND June 1999 TOKO, Inc. Page 1 TK11812 ABSOLUTE MAXIMUM RATINGS Input Voltage ............................................................ 16 V Output Voltage ......................................................... 15 V Power Dissipation (Note 1) .............................