TPS74801QDRCRQ1 - 1.5A Low-VIN Automotive LDO | TI
部品番号: TPS74801QDRCRQ1 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1 | $1.00 |
| 10 | $1 | $10.00 |
| 100 | $1 | $100.00 |
| 500 | $1 | $500.00 |
| 1,000 | $1 | $1,000.00 |
TPS74801QDRCRQ1 概要
An LDO (low-dropout) regulator is a type of linear voltage regulator that maintains a regulated output voltage even when the input supply is only slightly higher than the output. Within the power management IC hierarchy, the TPS74801-Q1 belongs to the low-VIN LDO family, positioned after point-of-load DC-DC converters to deliver clean post-regulated rails for processors, FPGAs, and ASICs.
Key features include a 0.8 V minimum input voltage that supports post-regulation of low core rails, 1.5 A continuous output current, a low dropout voltage that maximizes conversion efficiency in low-headroom designs, and programmable soft-start via an external capacitor for controlled inrush into heavy capacitive loads. The power-good (PG) output enables rail monitoring and sequencing logic, while the enable (EN) pin supports multi-rail power-up ordering.
Technically, the device uses an adjustable feedback architecture; the output voltage is set by an external resistor divider from OUT to the FB/adjacency network per the TI datasheet, and the soft-start pin programs output ramp time. The VSON-10 (DRC) package features an exposed thermal pad for low theta-JA and efficient heat spreading on multilayer PCBs.
Typical applications include automotive ADAS and infotainment processor core rails, FPGA/ASIC I/O and core power in industrial systems, and post-regulation of switching converter outputs where low noise and fast transient response are required. The Q1 grade suits 12 V automotive battery-derived intermediate buses.
Design tip: size the soft-start capacitor to limit inrush given downstream capacitance, and ensure the input rail stays above 0.8 V under all transients; dropout and thermal limits (1.5 A) should be verified with the TI thermal design procedure at maximum VIN-VOUT differential.
ドロップイン代替品: TPS74801QDRCRQ1 — 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: TPS74801QDRCRQ1 （同一形状・フットプリント） — 相違点: Output Type, Package, Enable Pin, Maximum Output Current, Output Voltage Range.
クイック比較ツール — 並列比較する代替部品を選択:
TPS74801TDRCRQ1
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS74801DRCR
✅ ドロップイン✓ 在庫あり
$1.18 / 個
データシートを見る →TPS74401DRCR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS74901DRCR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS74801QDRCRQ1 最大定格＆電気的特性
| 出力タイプ | Adjustable positive |
| 最大出力電流 | 1.5 A |
| Minimum Input Voltage | 0.8 V |
| パワーグッド出力 | Yes |
| イネーブルピン | Yes |
| ソフトスタート | Programmable via external capacitor |
| 出力数 | 1 |
| パッケージ | VSON-10 (DRC) 3x3 mm |
| 実装タイプ | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified (Q1) |
| RoHS ステータス | Compliant |
| Regulator Topology | LDO (linear regulator) |
TPS74801QDRCRQ1 ピン構成
| ピン 1 | IN — Input supply (0.8 V minimum) |
| ピン 2 | EN — Enable input for power sequencing |
| ピン 3 | SS — Soft-start programming capacitor |
| ピン 4 | PG — Power-good output (open-drain) |
| ピン 5 | FB — Feedback for adjustable output divider |
| ピン 6 | OUT — Regulated output |
| ピン 7 | OUT — Regulated output |
| ピン 8 | GND — Ground |
| ピン 9 | GND — Ground |
| ピン 10 | GND/Pad — Ground / exposed thermal pad |
主な用途
TPS74801QDRCRQ1 の用途: 6 件s: Automotive ADAS Processor Core Power, FPGA I/O and Core Rails, Infotainment and Display Power, Point-of-Load Post-Regulation, Industrial Control and Robotics, Camera and Sensor Module Supplies.
Automotive ADAS Processor Core Power
The TPS74801QDRCRQ1 fits ADAS SoC and microcontroller core rails because its 0.8-V minimum input permits post-regulation of already-low DC-DC outputs, and its 1.5-A rating covers typical core loads. Used after a buck converter, the LDO strips switching ripple without adding noise; the programmable soft-start limits inrush into large core decoupling, and the power-good flag gates downstream sequencing for safe processor power-up.
おすすめ
FPGA I/O and Core Rails
FPGAs require tightly regulated, sequenced rails; the TPS74801-Q1 delivers 1.5 A with adjustable output for VCCO/VCCAUX-class supplies. The enable pin allows rail ordering with system sequencing logic, while power-good signals completion to the FPGA configuration controller. Placing the LDO after a switching pre-regulator yields low output ripple; the trade-off is dissipation proportional to VIN-VOUT, so thermal margin must be verified at full load.
おすすめ
Infotainment and Display Power
In automotive infotainment head units, the TPS74801QDRCRQ1 post-regulates display, audio, and connectivity supply rails where noise from switching converters degrades performance. Its low-VIN operation suits the 1.0-1.8 V intermediate rails common in these systems, and the compact 3x3 mm DRC package fits dense PCBs behind displays. The power-good output simplifies fault reporting to the body controller via ISO transceivers.
おすすめ
Point-of-Load Post-Regulation
Distributed power architectures generate low intermediate buses with buck modules and then post-regulate locally. The TPS74801-Q1 is designed for exactly this: 0.8-V minimum input, adjustable output, and fast transient response for point-of-load rails feeding ASICs and memories. Unlike a second switching stage, the LDO adds no switching noise and needs only small ceramic capacitors; efficiency loss is the price of the cleanest possible rail.
おすすめ
Industrial Control and Robotics
Industrial drives and robotics controllers use multiple low-voltage rails for DSPs, gate drivers, and sensing. The TPS74801QDRCRQ1's enable and power-good features integrate into supply-sequencing state machines, and the AEC-Q100 grade provides robustness margins valued in harsh factory environments. Its 1.5-A capacity covers DSP core supplies such as those of C2000-family controllers used in motor control.
おすすめ
Camera and Sensor Module Supplies
Automotive camera and radar sensor modules require low-noise analog rails for image sensors and AFEs. The TPS74801-Q1 supplies these rails from low intermediate voltages with the adjustable output set precisely by resistor divider; soft-start prevents voltage overshoot that could stress sensitive sensor inputs. The 3x3 mm package suits the tight board space typical of camera modules mounted behind windshields.
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: TPS74801QDRCRQ1 — 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 | TPS74801TDRCRQ1 | TPS74801DRCR | TPS74401DRCR | TPS74901DRCR |
|---|---|---|---|---|---|
| Package | VSON-10 (DRC) 3x3 mm | VSON-10 (DRC) 3x3 mm - same | VSON-10 (DRC) 3x3 mm - same | VSON-10 (DRC) 3x3 mm - same | VSON-10 (DRC) 3x3 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 1.5 A | 1.5 A | 1.5 A | 1.5 A | Higher (family high-current variant) |
| Automotive Grade (Q1) | Yes (AEC-Q100) | Yes (AEC-Q100) | No | No (EP variant available) | No |
| Adjustable Output | Yes | Yes | Yes | Yes | Yes |
主な差別化要因
- Automotive AEC-Q100 qualification in a compact 3x3 mm footprint （vs TPS74801DRCR)
- 35% smaller footprint than the RGW variant （vs TPS74801QRGWRQ1)
- 0.8-V low-VIN operation enables single-stage post-regulation （vs TPS74401DRCR)
設計ノート
At 1.5 A with a large VIN-VOUT differential (e.g., 3.3 V to 1.2 V at 1.5 A = 3.15 W), the 3x3 mm VSON package relies heavily on the exposed thermal pad. Connect the pad to a solid ground plane with a via array (minimum 5x5 grid of thermal vias) per TI datasheet layout guidelines. Calculate junction temperature using theta-JA from the datasheet thermal table for your board stack-up before finalizing the layout.
Place the input and output ceramic capacitors (typically 10 uF class, per datasheet stability requirements) within 2-3 mm of the IN and OUT pins. Keep the FB divider trace short and away from switching-node traces to avoid coupling ripple into the feedback loop, which degrades transient response and output accuracy.
Do not let the input fall below 0.8 V, the TPS74801-Q1 minimum supply, during cold-crank or load-dump transients in automotive systems - verify against your supply's transient profile. Ensure the PG pin has an appropriate pull-up (to a valid rail, not an unpowered one), and size the SS capacitor so inrush current into downstream bulk capacitance stays below the 1.5-A limit.
コンプライアンス情報
AEC-Q100 automotive qualified (Q1 grade per ordering part number). RoHS/lead-free status typical of TI DRC-package LDOs; REACH and halogen details not present in provided data.
