TPS74801QDRCRQ1 - 1.5A Low-VIN Automotive LDO | TI
MPN: TPS74801QDRCRQ1 ✓ Hoạt độngTPS74801QDRCRQ1 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho TPS74801QDRCRQ1 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TPS74801QDRCRQ1 (cùng hình factor và footprint) — khác nhau ở Output Type, Package, Enable Pin, Maximum Output Current, Output Voltage Range.
TPS74801TDRCRQ1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS74801DRCR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TPS74401DRCR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS74901DRCR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS74801QDRCRQ1 Tỷ lệ tối đa & tính chất điện
| Kiểu đầu ra | Adjustable positive |
| Điện áp tối đa đầu ra | 1.5 A |
| Minimum Input Voltage | 0.8 V |
| Đầu ra tốt về điện năng | Yes |
| N Nap kích hoạt | Yes |
| Bắt đầu mềm | Programmable via external capacitor |
| Số lượng đầu ra | 1 |
| Hộp | VSON-10 (DRC) 3x3 mm |
| Kiểu lắp đặt | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified (Q1) |
| Trạng thái RoHS | Compliant |
| Regulator Topology | LDO (linear regulator) |
Cấu hình chân TPS74801QDRCRQ1
| Chân 1 | IN — Input supply (0.8 V minimum) |
| Chân 2 | EN — Enable input for power sequencing |
| Chân 3 | SS — Soft-start programming capacitor |
| Chân 4 | PG — Power-good output (open-drain) |
| Chân 5 | FB — Feedback for adjustable output divider |
| Chân 6 | OUT — Regulated output |
| Chân 7 | OUT — Regulated output |
| Chân 8 | GND — Ground |
| Chân 9 | GND — Ground |
| Chân 10 | GND/Pad — Ground / exposed thermal pad |
Ứng dụng tiêu biểu
TPS74801QDRCRQ1 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS74801QDRCRQ1 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Automotive AEC-Q100 qualification in a compact 3x3 mm footprint (vsTPS74801DRCR)
- 35% smaller footprint than the RGW variant (vsTPS74801QRGWRQ1)
- 0.8-V low-VIN operation enables single-stage post-regulation (vsTPS74401DRCR)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
