TK651XX TOKO [TOKO, Inc], TK651XX Datasheet
TK651XX
Related parts for TK651XX
TK651XX Summary of contents
Page 1
... The TK651xx low power step-up DC-DC converter is designed for portable battery powered systems, capable of operating from a single battery cell down to 0.9 V. The TK651xx provides the power switch and the control circuit for a boost converter. The converter takes a DC input and boosts regulated 2.7, 3.0 or 3.3 V output . ...
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... TK651xx ABSOLUTE MAXIMUM RATINGS All Pins Except SW and GND .................................... Pin ....................................................................... 9 V Power Dissipation (Note 1) ................................ 400 mW TK651xx ELECTRICAL CHARACTERISTICS Over operating temperature range and supply voltage range, unless otherwise specified ...
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... January 1999 TOKO, Inc. FINAL TEST CIRCUIT V IN LOI 300 k GND GND µF V OUT µ 220 µ the bench, the converter was loaded until “no pulse OUT TK651xx I OUT V OUT + µF Page 3 ...
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... TK651xx TK65127 ELECTRICAL CHARACTERISTICS Over operating temperature range and supply voltage range, unless otherwise specified ...
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... MAXIMUM OUTPUT CURRENT INDUCTOR VALUE (µ 100 0 40 INDUCTOR VALUE (µH) TK651xx VS LOAD 1 1 (V) VS 1.3 V 1 100 I OUT (mA) VS. NO PULSE SKIPPING MODE 1.3 V ...
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... TK651xx TK65130 ELECTRICAL CHARACTERISTICS Over operating temperature range and supply voltage range, unless otherwise specified ...
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... V 2.9 2.5 V 2.8 2.7 100 1 MAXIMUM OUTPUT CURRENT INDUCTOR VALUE (µ 1 2 100 0 40 INDUCTOR VALUE (µH) TK651xx VS LOAD 1 1 (V) VS 1.3 V 1.6 V 2.5 V 1 100 I OUT (mA) VS. NO PULSE SKIPPING MODE ...
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... TK651xx TK65133 ELECTRICAL CHARACTERISTICS Over operating temperature range and supply voltage range, unless otherwise specified ...
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... 0.9 V 3.2 2.5 V 3.1 3.0 100 1 MAXIMUM OUTPUT CURRENT INDUCTOR VALUE (µ 100 0 40 INDUCTOR VALUE (µH) TK651xx VS LOAD 1 1 (V) VS 1.3 V 2.0 V 1.1 V 2 100 I OUT (mA) VS. NO PULSE SKIPPING MODE ...
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... TK651xx The TK651xx is a boost converter control IC with the power MOSFET switch built into the device. It operates from a single battery cell and steps up the output voltage to a regulated 2.7, 3.0 and 3.3 V. The device operates at a fixed nominal clock frequency of 83 kHz. In its simplest form, a boost power converter using the TK651xx requires only three external components: an inductor, a diode, and a capacitor ...
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... OUT(MIN) ” is best approximated by the diode forward F(MAX ” which, in turn function of “L”. PK ”, and then determine a new PK ”. Then, if necessary, reiterate. TK651xx ” F(MAX) IN(MIN) ” F ”, F ” and “D”, and IN Page 11 ...
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... The following series of Toko inductors work especially well with the TK651xx : 10RF, 12RF, 3DF, D73, and D75. The 5CA series can be used for isolated-output applications, although such design objectives are not considered here. ...
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... SINGLE-CELL APPLICATION (CONT the same battery is powering the TK651xx at the V pin (i.e., the normal case), then the IC may become inoperable due to insufficient V . This is why the application IN test circuit features an RC filter into the V draw is very small, so the voltage drop across this filter resistor is negligible ...
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... When any DC-DC converter is used to convert power in RF circuits (e.g., pagers) the spectral noise generated by the converter, whether conducted or radiated concern. The oscillator of the TK651xx has been trimmed and stabilized to 83 +/- 4 kHz with the intention of greatly Page 14 minimizing interference at the common IF frequency of 455 kHz ...
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... OUT 2 OUT L Targeted output current capability Diode forward voltage Oscillating duty ratio of main switch Inductance value Inductor winding resistance Output filter resistance Snubber capacitance ” equal to the targeted value. Then, OUT TK651xx OUT Page 15 ...
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... TK651xx There are special considerations involved in designing a converter with the TK651xx for use with two battery cells. With two battery cells, the TK651xx can provide substantially more output current than a single cell input for the same efficiency. The concern is the possibility of saturating the inductor. ...
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... STEP-DOWN CONVERTER APPLICATION HOW TO MAKE A STEP-DOWN CONVERTER USING THE TK651xx AND AN IRF7524D1 “FETKY” PART The TK651xx can be used as a controller in a step-down converter with the following two additional changes. See Fig 3. FIGURE 3: STEP-DOWN CONVERTER USING THE TK651xx SCHEMATIC 1) Change the main switch orientation for use in a step-down converter. An external P-channel power MOSFET is used as the main switch in a step-down converter configuration ...
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... An evaluation board for this converter has been made using a TOKO 3DF, D73 or D75 series inductor, using only 0.96 sq. inches of board space. The artwork for the surface-mount circuit board is shown below in Figure 4. FIGURE 4: TK651xx STEP-DOWN CONVERTER EVALUATION BOARD ARTWORK Page 18 Actual Size VOUT G G VIN 1.2 " Note: Short pin for use with TK651xx January 1999 TOKO, Inc. ...
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... LOI GND GND 10 µF V OUT IND µ 220 TK651xx Note: Equal charge into and out of “supercap” (30 mA (1A) Drawing not to scale - µ OUT V OUT "SUPERCAP" GOLD CAP Page 19 ...
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... Feehanville Drive, Mount Prospect, Illinois 60056 Tel: (847) 297-0070 Eastern Regional Office Toko America, Inc. 107 Mill Plain Road Danbury, CT 06811 Tel: (203) 748-6871 Fax: (203) 797-1223 IC-xxx-TK651xx 0798O0.0K Marking Information TK65127 TK65130 TK65133 0.4 Fax: (847) 699-7864 Semiconductor Technical Support ...