TPS7A4700RGWR - 36V 1A Ultralow-Noise LDO | Texas Instruments
部品番号: TPS7A4700RGWR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $6.2727 | $6.27 |
| 10 | $4.5303 | $45.30 |
| 100 | $4.0076 | $400.76 |
| 500 | $3.8333 | $1,916.65 |
| 1,000 | $3.6591 | $3,659.10 |
TPS7A4700RGWR 概要
An LDO is a type of linear voltage regulator that maintains a stable output even when the input-to-output differential is small. In the power-management IC hierarchy, an LDO typically follows a switching converter or battery to generate a clean analog rail for noise-sensitive loads such as op-amps, ADCs, and PLL/VCO blocks.
Key features include 4.17 uVRMS output noise, high power supply rejection ratio (PSRR), and the unique ANY-OUT technique: the output voltage is user-programmable up to 20.5V via PCB layout connections without external feedback resistors or feed-forward capacitors, reducing component count and eliminating resistor thermal noise. Note this variant has no enable pin (choose TPS7A4701 for enable).
Technically, the bipolar architecture with precision bandgap reference delivers high PSRR, suppressing switching-converter ripple and making the device an ideal post-regulator after a DC-DC stage. The absent external divider shortens the sense path, lowering the noise floor further.
Typical applications include precision test and measurement instrumentation, RF transceiver PLL/VCO rails, audio DAC supplies, industrial 24V-bus sensor conditioning (36V rating provides headroom), and medical diagnostics.
Design consideration: verify the PCB routing pattern that sets the output voltage, since this variant has no external adjust pin; use adequate copper pour under the exposed pad for thermal relief. As of 2026-08-29, the part is stocked at DigiKey and Mouser.
ドロップイン代替品: TPS7A4700RGWR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TPS7A4700RGWR （同一形状・フットプリント） — 相違点: Enable Pin, Output Type, Package, Input Voltage Range, Output Noise.
クイック比較ツール — 並列比較する代替部品を選択:
TPS7A4701RGWR
✓ 在庫あり
$3.2467 / 個
データシートを見る →TPS7A4700QRGWRQ1
✓ 在庫あり
$3.65 / 個
データシートを見る →TPS7A4701QRGWRQ1
✓ 在庫あり
$3.48 / 個
データシートを見る →TPS7A3301RGWR
📋 参考代替品（カタログ未掲載）
LT3045EDD
📋 参考代替品（カタログ未掲載）
TPS7A4700RGWR 最大定格＆電気的特性
| 出力タイプ | Positive, adjustable (ANY-OUT programmable) |
| 出力電圧範囲 | 1.4 V to 20.5 V (ANY-OUT via PCB layout) |
| 最大出力電流 | 1 A |
| 入力電圧範囲 | 3 V to 36 V |
| 出力ノイズ | 4.17 uVRMS (20 Hz to 100 kHz) |
| イネーブルピン | No (TPS7A4701 variant has enable) |
| パッケージ | VQFN-20 (RGW) 5x5 mm with exposed pad |
| 実装タイプ | Surface Mount |
| MSLレベル | 2 (260C, 1 year) |
| RoHS ステータス | Compliant |
| Regulator Topology | LDO linear regulator (bipolar, bandgap reference) |
TPS7A4700RGWR ピン構成
| ピン 1 | IN — Input supply, 3V to 36V |
| ピン 2 | IN — Input supply |
| ピン 3 | EN/NC — No enable on TPS7A4700 (TPS7A4701 only) |
| ピン 4 | NR/SS — Noise reduction / soft-start capacitor |
| ピン 5 | GND — Ground |
| ピン 6 | SENSE combos (ANY-OUT) — PCB-programmed output voltage sense pins |
| ピン 7 | OUT — Regulated output, 1.4V to 20.5V |
| ピン 8 | OUT — Regulated output |
| ピン 9 | PG — [DATA_NEEDED: exact per-pin mapping from datasheet pin table] |
| ピン Pad | Thermal Pad — Exposed pad, connect to GND for thermal dissipation |
主な用途
TPS7A4700RGWR の用途: 6 件s: RF Transceiver PLL/VCO Power Rails, Precision Test and Measurement Instrumentation, Audio DAC and Headphone Amplifier Supply, Industrial 24V Bus Sensor Conditioning, Medical Diagnostic Equipment, Automotive Infotainment and ADAS Analog Rails.
RF Transceiver PLL/VCO Power Rails
The TPS7A4700RGWR's 4.17 uVRMS noise and high PSRR make it ideal for powering PLL and VCO blocks in RF transceivers, where phase noise directly depends on supply cleanliness. Placed as a post-regulator after a DC-DC converter, it suppresses switching ripple before it reaches the oscillator tuning port. The 36V input also supports RF modules fed from higher-voltage industrial supplies. Use 10uF ceramic input/output capacitors with short sense routing to preserve the low noise floor.
おすすめ
Precision Test and Measurement Instrumentation
Bench instruments and automated test equipment need clean analog rails to preserve measurement accuracy at microvolt levels. The TPS7A4700RGWR's 4.17 uVRMS noise and bandgap-based reference support ADC/DAC reference supplies and op-amp rails without adding resistor-divider thermal noise thanks to the ANY-OUT topology. The 1A capacity covers multiple signal-chain blocks from one regulator, and the 36V input tolerates industrial supply variation during line-transient testing.
おすすめ
Audio DAC and Headphone Amplifier Supply
Audio DACs and headphone amplifiers demand supply rails with noise far below the audible threshold. The TPS7A4700RGWR delivers 4.17 uVRMS over 20 Hz to 100 kHz, and because ANY-OUT programming uses no feedback resistors, no divider thermal noise couples into the audio band. Its high PSRR rejects upstream switcher ripple that would otherwise appear as audible artifacts. A single 1A rail can power the DAC analog supply and output amplifiers together.
おすすめ
Industrial 24V Bus Sensor Conditioning
Industrial sensor front ends powered from 24V buses benefit from the TPS7A4700RGWR's 36V input rating, which leaves surge headroom above nominal bus voltage. A DC-DC converter steps down efficiently first, then this LDO post-regulates to a clean analog rail for signal conditioning amplifiers and ADCs, rejecting switching residue. Any-OUT programming allows rail voltages matched to sensor requirements without external resistors that add noise and BOM cost.
おすすめ
Medical Diagnostic Equipment
Medical imaging and diagnostic signal chains require extremely low supply noise to preserve physiological signal fidelity. The TPS7A4700RGWR's 4.17 uVRMS noise floor and high PSRR support analog front-end rails for biosignal amplifiers and precision converters. The 1A output powers multi-channel front ends from one regulator, simplifying rail count, while the low-dropout bipolar architecture maintains regulation even at low headroom, extending battery-powered portable instrument runtime.
おすすめ
Automotive Infotainment and ADAS Analog Rails
For automotive designs requiring AEC-Q100 qualification, the pin-compatible TPS7A4700QRGWRQ1 variant delivers identical 36V/1A/4.17 uVRMS performance with automotive-grade screening. It is suited to ADAS sensor module analog rails and infotainment audio supplies where 12V-battery transients demand high input ratings. Pair it with an automotive buck pre-regulator to maximize efficiency while preserving the low-noise post-regulation benefit.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TPS7A4700RGWR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TPS7A4701RGWR | TPS7A4700QRGWRQ1 | TPS7A4701QRGWRQ1 | TPS7A3301RGWR | LT3045EDD |
|---|---|---|---|---|---|---|
| Package | VQFN-20 (RGW) 5x5 mm | VQFN-20 (RGW) - same | VQFN-20 (RGW) - same | VQFN-20 (RGW) - same | VQFN-20 (RGW) - same | DFN-10 - different |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Input Voltage Range | 3V to 36V | 3V to 36V | 3V to 36V | 3V to 36V | -3V to -36V | 1.8V to 5.5V |
| Output Current | 1 A | 1 A | 1 A | 1 A | 1 A (negative) | 0.5 A |
| Output Noise | 4.17 uVRMS | 4.17 uVRMS | 4.17 uVRMS | 4.17 uVRMS | 6.5 uVRMS | 0.8 uVRMS |
| Output Voltage Range | 1.4V to 20.5V (ANY-OUT) | 1.4V to 34V (external divider) | 1.4V to 20.5V (ANY-OUT) | 1.4V to 34V (external divider) | -1.2V to -36V | 0V to 15V |
| Enable Pin | No | Yes (active-high) | No | Yes (active-high) | Yes | Yes |
主な差別化要因
- ANY-OUT resistor-free output programming （vs TPS7A4701RGWR)
- High-voltage 36V input headroom （vs LT3045EDD)
- Automotive drop-in option （vs TPS7A4700QRGWRQ1)
設計ノート
The ANY-OUT output voltage is set by which sense pins are connected to OUT in the PCB layout - follow the TPS7A47 datasheet programming table exactly and verify routing before fabrication, since errors cannot be fixed with component changes. Use 10uF ceramic input and output capacitors placed within 2-3 mm of the pins, with a 0.1uF parallel cap for high-frequency bypass.
At large VIN-VOUT differentials, dissipation is significant: 24V in, 5V out at 1A means 19W. The VQFN-20 exposed pad requires a solid GND copper pour (at least 1 square inch, multiple thermal vias) to keep junction temperature within limits. For high-dissipation designs, consider splitting the drop across a DC-DC pre-regulator plus this LDO.
This variant has no enable pin - if your design requires power sequencing, choose TPS7A4701RGWR (same footprint). Do not exceed 36V input including transients on industrial 24V buses. The NR/SS capacitor sets soft-start and noise bandwidth; do not omit it or output startup overshoot and excess noise may result.
コンプライアンス情報
RoHS compliant per DigiKey/PartGenie listings. MSL 2 (260C, 1 year). AEC-Q100 qualification applies only to the Q1 variants (TPS7A4700QRGWRQ1).
