カテゴリー別アーカイブ: DC-DC

USB to 3.3V DC-DC

TPS62250 2〜6V 600mA SON6 $1.28@100@digikey
1310220540 1310220541 1310220542 1310220543

MIC23050 2.7〜5.5V 600mA MLF6 $1.36@100@digikey
1310220600 1310220601 1310220602 1310220603

LT >$3.00@100@digikey

NCP1529 2.7〜5.5V 1A SOP5 $0.63@100@digikey
5pin(FB): クリティカル(タッチするとリセットする)、220,102,103交換でも効果なし
1310220640 1310220641 1310220642 13102206431310220830 1310220831 1310220832 1310220833 1310220834
3.3V=0.6V x (1+R1/R2), (3.3V/0.6V)-1=9/2=R1/R2
R1=900K, R2=200K or R1=1M, R2=1/9*2=0.222=222K
R1=1M,R2=221K, 3.315V=0.6V * (1+1000/221)
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Cff=18pF(min), 220:動作確認済, 102,103:動作確認済(始動が遅くなる)
1310240810
MLP2520H2R2S 2.5×2.0mm 2.2uH 80mΩ 1.5A $0.27@100@digikey
1310221250 1310221251
VLS252010T-2R2M 2.5×2.0mm 2.2uH 158mΩ 1.4A $0.55@100@digikey 動作確認済
1310221252 1310221253
LQM2HPN2R2MG0L 2.5×2.0mm 2.2uH 80mΩ 1.3A $0.22@100@digikey
1310221355 1310221356

LT3973 4.2V〜42V 750mA MSOP10

LT3973 4.2V〜42V 750mA MSOP10 $3.46@100@digikey
1310210929 1310210930 1310210931 1310210932
Coil: VLC5045T-150M 5.0×5.0mm 0.1Ω 1.8A $0.32@100@digikey
R1=R2 * ( Vout/1.21 – 1 ), 1M=R2 * ( 3.3V / 1.21 – 1 ), R2=579K
3.31V R1=1M R2=576K
1310250800
要検証: C2=0.47uF 0.22uF
要検証: C5=15pF 10pF

LTC3255 4V〜48V 50mA MSOP10 $2.79@100@digikey
Output 2.4V〜12.5V, Charge Pump (No Inductor)

ADuM5402 DC-DC

ADuM521x 3.3V 66mW
ADuM5402 3.3V 200mW SOP16-1.27 5402ARWZ(1Mbps)$7.75, 5402CRWZ(25Mbps)$9.43@100@Digikey
ADuM620x 3.3V 132mW
ADuM640x 3.3V 132mW
絶縁 isolated

DC-DC 降圧 入力12V 出力3.3V 5.0V

降圧コンバーター

  • TI TPS62160DGK SOP8 (excl. Inductor) in 3-17V out 0.9-6V 1A $1.34-@100@digikey
  • TI TPS62160DSG SON8 (excl. Inductor) in 3-17V out 0.9-6V 1A $1.34-@100@digikey パッケージ
  • Taiyo Yuden Inductor 2.2uH, 1.5A, 3.0×3.0x1.5mm, NR3015T2R2M, $0.24@100@digikey
  • TDK VLF3012ST-2R2M1R4 $0.77-@100@digikey
  • TDK VLS3015T-2R2M1R4 $0.47-@100@digikey
  • CDPH28D11FNP-2R2MC $0.39-@100@digikey
  • TPS62160EVM-627 評価ボード $25.5-@digikey
  • R1=R2*(Vout/0.8-1), (R2<400K) → 出力 3.3V: R1=R2*3.125 → R1=1M, R2=320K(220K+100K)
  • Capacitor Input 10uF, Output 22uF
  • Vin -0.3 to 20V 絶対最大電圧
  • 出力電圧誤差 ±4%
  • Vin ≥ Vout +1V