リニア･レギュレータは、安定して制御された出力電圧を簡単な設計と、わずかな外付け部品で実装するコスト効率に優れた製品です。出力電流が数アンペア未満で出力電圧が入力電圧に近いアプリケーションでは、低ドロップアウト（LDO）リニア･レギュレータを使用することで、コストとパフォーマンスの最適なトレードオフが得られます。
LDOは、デバイスの発熱による電力損失を最小限に抑え、変換効率を高めるために、極めて低い入力-出力電圧差（ドロップアウト電圧）で動作するように設計されたリニア･ボルテージ･レギュレータです。
DC-DCスイッチング･コンバータと比較すると、LDOレギュレータはリップルが発生しないため、極めてノイズの少ない電源電圧が得られます。また、必要な外部受動部品数が最小限に抑えられるため設計工数も低減されます。
STの低ドロップアウト（LDO）レギュレータは、低ドロップアウト電圧、低暗電流、高速過渡応答、低ノイズ、および良好なリップル除去比の最適な組み合わせを提供しています。
特に、以下の機能を備える超低ドロップアウト･レギュレータは、コンスーマおよび産業アプリケーション、携帯型医療機器のバッテリ駆動アプリケーションに最適です。
- バッテリ駆動時間を延ばす超低暗電流（最小0.3µA）
- 最小フットプリントを実現する超小型パッケージ･オプション（0.65 x 0.65mmフリップチップ、0.47 x 0.47mm STSTAMP™など）
高いPSRR（電源電圧変動除去比）と低いノイズにより、信号パス全体で幅広い入力電圧および出力電流にわたり信号の信頼性を維持します。
ビデオ
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.
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LDBL20
200 mA very 200 mA very low quiescent current linear regulator IC in (0.47x0.47) mm² ST STAMP™ package
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LDL212
1.2A Low Drop Linear Regulator IC
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LFXX
Very low drop voltage regulator with inhibit
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STLQ50
50mA, 3µA Supply current low drop linear regulator
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LD39050
500 mA low quiescent current and low noise voltage regulator
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LDLN025
250 mA ultra-low noise LDO
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LD39015J
150 mA low quiescent current low noise voltage regulator
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ST1L05
Very low quiescent BiCMOS voltage regulator
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LDK130
300 mA low quiescent current very low noise LDO
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ST1L08
800 mA Ultra low drop, high PSRR voltage regulator
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LK112S
Low noise and low drop voltage regulator with shutdown function
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LD39150
Ultra low drop BiCMOS voltage regulator
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ST715
High input voltage - 85 mA LDO linear regulator
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LDK120
200 mA low quiescent current very low noise LDO
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L4940
1.5 A very low drop voltage regulator IC
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LD49150
1.5 A ultra low dropout voltage regulator
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LD39080
Ultra low drop BICMOS voltage regulator
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LD49300
3A Very low drop for low output voltage regulator
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LDCL015
150 mA capless ultra low drop linear regulator ICs
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LM2931
Very low drop voltage regulators with inhibit function
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LK112
Low noise and low drop voltage regulator with shutdown function
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L4941
Very low drop 1A regulator
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LDLN050
500 mA, high performance low dropout linear regulator
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LDL112
1.2 A low quiescent current LDO with reverse current protection
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LDLN030
300 mA ultra-low noise LDO with Power Good and Soft Start
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L6932
High Performance 2A ULDO Linear Regulator
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LD39115J
150 mA low quiescent current low noise voltage regulator
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LDK715
High input voltage 85 mA LDO linear regulator
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LD39030SJ
300 mA low quiescent current soft-start, low noise voltage regulator
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ST730
300 mA, 28 V low-dropout voltage regulator, with 5 µA quiescent current
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LDF
1A Very low drop voltage regulator IC
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LD2979
Very low drop voltage regulators with inhibit
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LD2980
Ultra low drop voltage regulators compatible with low ESR output capacitors
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LEXX
Very low-dropout voltage regulator with inhibit function
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KFXX
Very low drop voltage regulators with inhibit
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LD56050
500mA ultra low dropout linear regulator with bias supply
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LD59030
300 mA very low dropout current linear regulator IC
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LDS3985
Very low drop and low noise BiCMOS 300 mA voltage regulator
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LD59015
150 mA low noise high PSRR linear voltage regulator
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LD39300
Ultra low drop BICMOS voltage regulator
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LDLN015
150 mA - ultra low noise - high PSRR linear voltage regulator IC
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LDK320
200 mA low quiescent current and high PSRR voltage regulator
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LDL1117
1.2 A High PSRR low dropout linear voltage regulator
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LD39015
150 mA low quiescent current low noise voltage regulator
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LD29150
1.5 A, very low drop voltage regulators
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LD39200
2 A high PSRR ultra low drop linear regulator with reverse current protection
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LD3985
Ultra low drop-low noise BiCMOS voltage regulators low ESR capacitors compatible
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LDFM
500 mA very low drop voltage regulator
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LD39130S
300 mA very low quiescent current Linear regulator IC with automatic Green mode
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LD59150
1.5A Low Dropout Linear Regulator with Programmable Soft-Start
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LD56100
1A very low dropout fast transient ultra-low noise linear regulator
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LD39030
300 mA very low quiescent current linear regulator IC
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L6932H1.2
High Performance 2A ULDO Linear Regulator
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STLQ020
200 mA ultra-low quiescent current LDO
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LD39100
1 A low quiescent current low noise voltage regulator
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LDO40L
400 mA, 38 V low-dropout regulator, with 45µA quiescent current
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LD59100
1A Ultra Low-Dropout regulator with Reverse Current Protection
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LDK220
200 mA low quiescent current and low noise LDO
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ST732
300mA, 28V low-dropout voltage regulator, with 6µA quiescent current
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STLQ015
150 mA - ultra low quiescent current linear voltage regulator
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LD29300
3 A, very low drop voltage regulators
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L4931
Very low drop voltage regulators with inhibit
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LD2981
Ultra low drop voltage regulators with inhibit low ESR output
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LD29080
800 mA fixed and adjustable output very low drop voltage regulator
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LD39020
200 mA very low quiescent current Linear regulator IC
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LD2985
Very low drop and low noise voltage regulator with inhibit function
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LD39030
300 mA very low quiescent current linear regulator IC
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LDBL20
200 mA very 200 mA very low quiescent current linear regulator IC in (0.47x0.47) mm² ST STAMP™ package
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LD59015
150 mA low noise high PSRR linear voltage regulator
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STLQ020
200 mA ultra-low quiescent current LDO
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LD39100
1 A low quiescent current low noise voltage regulator
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STLQ50
50mA, 3µA Supply current low drop linear regulator
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LD39050
500 mA low quiescent current and low noise voltage regulator
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LDLN015
150 mA - ultra low noise - high PSRR linear voltage regulator IC
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LDLN025
250 mA ultra-low noise LDO
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LD39115J
150 mA low quiescent current low noise voltage regulator
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ST732
300mA, 28V low-dropout voltage regulator, with 6µA quiescent current
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LD39015
150 mA low quiescent current low noise voltage regulator
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STLQ015
150 mA - ultra low quiescent current linear voltage regulator
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LDK715
High input voltage 85 mA LDO linear regulator
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LD39015J
150 mA low quiescent current low noise voltage regulator
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LDK130
300 mA low quiescent current very low noise LDO
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LD39200
2 A high PSRR ultra low drop linear regulator with reverse current protection
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LD39030SJ
300 mA low quiescent current soft-start, low noise voltage regulator
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ST715
High input voltage - 85 mA LDO linear regulator
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LDK120
200 mA low quiescent current very low noise LDO
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LD39020
200 mA very low quiescent current Linear regulator IC
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ST730
300 mA, 28 V low-dropout voltage regulator, with 5 µA quiescent current
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LD39130S
300 mA very low quiescent current Linear regulator IC with automatic Green mode
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LD59150
1.5A Low Dropout Linear Regulator with Programmable Soft-Start
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LD56100
1A very low dropout fast transient ultra-low noise linear regulator
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LD59030
300 mA very low dropout current linear regulator IC
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LDBL20
200 mA very 200 mA very low quiescent current linear regulator IC in (0.47x0.47) mm² ST STAMP™ package
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LD39100
1 A low quiescent current low noise voltage regulator
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LD59015
150 mA low noise high PSRR linear voltage regulator
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LD39050
500 mA low quiescent current and low noise voltage regulator
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LDLN050
500 mA, high performance low dropout linear regulator
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LDLN030
300 mA ultra-low noise LDO with Power Good and Soft Start
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LDLN015
150 mA - ultra low noise - high PSRR linear voltage regulator IC
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LD59100
1A Ultra Low-Dropout regulator with Reverse Current Protection
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LDLN025
250 mA ultra-low noise LDO
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LD39115J
150 mA low quiescent current low noise voltage regulator
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LD39015
150 mA low quiescent current low noise voltage regulator
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LD39200
2 A high PSRR ultra low drop linear regulator with reverse current protection
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LD39030SJ
300 mA low quiescent current soft-start, low noise voltage regulator
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LD39020
200 mA very low quiescent current Linear regulator IC
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LD3985
Ultra low drop-low noise BiCMOS voltage regulators low ESR capacitors compatible
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LD59030
300 mA very low dropout current linear regulator IC
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LD56050
500mA ultra low dropout linear regulator with bias supply
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LDL212
1.2A Low Drop Linear Regulator IC
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LDS3985
Very low drop and low noise BiCMOS 300 mA voltage regulator
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LD39050
500 mA low quiescent current and low noise voltage regulator
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LD39300
Ultra low drop BICMOS voltage regulator
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LDK320
200 mA low quiescent current and high PSRR voltage regulator
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LD39015
150 mA low quiescent current low noise voltage regulator
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LD39200
2 A high PSRR ultra low drop linear regulator with reverse current protection
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LDK130
300 mA low quiescent current very low noise LDO
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ST1L08
800 mA Ultra low drop, high PSRR voltage regulator
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LK112S
Low noise and low drop voltage regulator with shutdown function
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LD39150
Ultra low drop BiCMOS voltage regulator
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LDK120
200 mA low quiescent current very low noise LDO
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LD3985
Ultra low drop-low noise BiCMOS voltage regulators low ESR capacitors compatible
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LDFM
500 mA very low drop voltage regulator
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L4940
1.5 A very low drop voltage regulator IC
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LD39130S
300 mA very low quiescent current Linear regulator IC with automatic Green mode
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LD49150
1.5 A ultra low dropout voltage regulator
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LD59150
1.5A Low Dropout Linear Regulator with Programmable Soft-Start
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LD39080
Ultra low drop BICMOS voltage regulator
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LD49300
3A Very low drop for low output voltage regulator
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LDCL015
150 mA capless ultra low drop linear regulator ICs
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LD56100
1A very low dropout fast transient ultra-low noise linear regulator
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LD39100
1 A low quiescent current low noise voltage regulator
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L6932H1.2
High Performance 2A ULDO Linear Regulator
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L4941
Very low drop 1A regulator
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LDL112
1.2 A low quiescent current LDO with reverse current protection
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LDO40L
400 mA, 38 V low-dropout regulator, with 45µA quiescent current
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LD59100
1A Ultra Low-Dropout regulator with Reverse Current Protection
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LD39115J
150 mA low quiescent current low noise voltage regulator
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STLQ015
150 mA - ultra low quiescent current linear voltage regulator
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LDK220
200 mA low quiescent current and low noise LDO
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L6932
High Performance 2A ULDO Linear Regulator
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L4931
Very low drop voltage regulators with inhibit
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LD39030SJ
300 mA low quiescent current soft-start, low noise voltage regulator
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LDF
1A Very low drop voltage regulator IC
