LDO（低ドロップアウト）リニア･レギュレータは、きわめて低い入出力電圧差（ドロップアウト電圧）で動作するリニア･ボルテージ･レギュレータです。デバイスの発熱による電力損失を最小限に抑え、変換効率の向上に貢献します。
STが提供するクラス最高レベルのLDOレギュレータの製品ポートフォリオ
LDOレギュレータとリニア･レギュレータの比較
リニア･ボルテージ･レギュレータはコスト効率に優れ、外付け部品をほとんど必要としないシンプルな設計により、安定して制御された出力電圧を供給します。LDOレギュレータは、出力電流が数アンペア未満で、入出力電圧差の小さいアプリケーションにおいて優れたコストパフォーマンスを実現します。
LDOレギュレータとスイッチング･コンバータの比較
LDOレギュレータは、DC-DCスイッチング･コンバータと比べて、リップルが生じないため、きわめてノイズの少ない電源電圧が得られます。また、外付けの受動部品が最小限で済むため、設計工数の削減に貢献します。
STのLDOレギュレータは以下の特徴があります。
- 低ドロップアウト電圧
- 低静止電流（低IQ）
- 高速過渡応答
- 低ノイズ
- 高いリップル除去比
STの超低ドロップアウト･レギュレータは、コンスーマ向け、産業向け、および携帯型医療機器におけるバッテリ駆動アプリケーションに適した以下の特徴を持ちます。
- バッテリ駆動時間を延ばす超低静止電流（最小0.3µA）
- 最小基盤面積を実現する超小型パッケージ･オプション（0.65mm x 0.65mmフリップチップ、0.47mm x 0.47mm STSTAMP™など）
高いPSRR（電源電圧変動除去比）と低ノイズにより、信頼性の高い信号を信号パス全体の幅広い入力電圧 / 出力電流にわたり実現します。
推奨コンテンツ
Find the best design solution thanks to high-performances Quad-LDO evaluation board
The STEVAL-LDO001V1 allows smart evaluation of four ST's high-performance low-dropout linear voltage regulators specially designed for extend battery life in portable smart devices. Thanks to state-of-the-art technologies, designs and innovative packaging, designers can select the best solution in terms of ultra-low quiescent current, ultra-low noise and high PSRR, automatic green mode and miniature packages such as Flip-Chip or ST STAMP™.
Ultra-tiny low-dropout regulator in breakthrough bumpless chip-scale package
The LDBL20 is a powerful 200 mA LDO in a tiny 0.47 x 0.47 mm innovative ST STAMP™ chip-scale package. The input voltage can range from 1.5 to 5.5 V, with 200 mV typical dropout. Rejection (PSRR) of 80 dB at 100 Hz and 50 dB at 100 kHz simplifies filtering over a wide frequency range to provide a stable rail for low-power circuitry in battery-operated applications. Quiescent current of 20 µA no-load, 100 µA full-load, and 0.3 µA in standby help maximize efficiency under all operating conditions.
More from 低ドロップアウト（LDO）リニア･レギュレータ portfolio
- LDBL20 200 mA very low quiescent current linear regulator IC in (0.47x0.47) mm² ST STAMP™ package
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- LD39200 2 A high PSRR ultra low drop linear regulator with reverse current protection
- LD39030SJ 300 mA low quiescent current soft-start, low noise voltage regulator
- ST715 High input voltage, 85 mA LDO linear regulator
- LDK120 200 mA low quiescent current very low noise LDO
- LD39020 200 mA very low quiescent current Linear regulator IC
- ST730 300 mA, 28 V low-dropout voltage regulator, with 5 µA quiescent current
- LD39130S 300 mA very low quiescent current Linear regulator IC with automatic Green mode
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- LD57100 1 A ultra low-dropout LDO with bias
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