RTQ2533WGQV(2) - 3A Ultra-Low Noise LDO, 6.5V, VQFN-20 | Richtek
Артикул: RTQ2533WGQV(2) ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.67 | $16,70 |
| 100 | $1.48 | $148,00 |
| 500 | $1.32 | $660,00 |
| 1.000 | $1.18 | $1.180,00 |
| 3.000 | $1.05 | $3.150,00 |
RTQ2533WGQV(2) Обзор
An LDO (Low-Dropout) linear regulator is a type of linear voltage regulator that maintains a regulated output voltage even when the input-to-output differential approaches the minimum pass-element headroom. Within the broader product hierarchy, an LDO is a linear regulator is a voltage regulator is a power management IC. Because the pass element operates in the linear region (not switching), the LDO adds no high-frequency switching noise to the output - this is the defining advantage over switch-mode converters for noise-sensitive analog and RF rails.
Key features of the RTQ2533WGQV(2) include pin-programmable output voltage that eliminates feedback resistors for the most common voltages (reducing BOM count and PCB area), an exposed thermal pad for high-current operation, internal soft-start to limit inrush current, and built-in protection including current limit and thermal shutdown. The combination of 3 A continuous load and 180 mV maximum dropout supports tight point-of-load regulation in systems where headroom is constrained.
The regulator uses a PNP pass architecture with a precision bandgap reference and trimmed feedback network, achieving 1% output accuracy across the entire VIN/VOUT/load/temperature envelope. The exposed thermal pad on the VQFN-20 package provides a low thermal-resistance path (theta_JC substantially lower than theta_JA) for sustained 3 A operation without external heatsinking.
Typical applications include FPGA and ASIC core/IO rail regulation, server and networking point-of-load supplies, audio codec and DAC power rails, RF transceiver local regulation, and industrial 5 V/3.3 V point-of-load conversion. The wide input range and 3 A output suit multi-rail systems where one input rail feeds several regulated outputs.
When designing with this part, follow the manufacturer's PCB layout guidelines: place input and output capacitors as close as possible to the IC, use sufficient copper pour on the exposed thermal pad to keep junction temperature below 125 C, and select the output voltage via proper PCB routing as documented in the datasheet to avoid needing external resistors.
This page synthesizes distributor pricing, drop-in Richtek same-family alternatives, and practical thermal/layout guidance not consolidated in the manufacturer datasheet alone, giving engineers a single source for selection and procurement decisions.
Аналоги без доработки для RTQ2533WGQV(2) — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
RTQ2533WGQV
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
RTQ2533W
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
RTQ2533AGQV
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
RTQ2533WGQV(2) Максимальные параметры и электрические характеристики
| Топология | Low-Dropout (LDO) Linear Regulator |
| Диапазон входного напряжения | 1.1 V to 6.5 V |
| Output Voltage Range (set by resistive divider) | 0.8 V to 5.5 V |
| Output Voltage Range (set by PCB layout) | 0.8 V to 3.95 V |
| Максимальный выходной ток | 3 A |
| Напряжение падения | 180 mV (max at 3 A) |
| Output Noise (0.8 V) | 6.8 uVrms |
| Output Noise (3.3 V) | 10 uVrms |
| PSRR | 40 dB at 500 kHz |
| Output Voltage Accuracy | 1% over line, load, and temperature |
| Тип выхода | Positive Adjustable (pin-selectable) |
| Корпус | 20-VQFN (3.5 mm x 3.5 mm) |
| Тип монтажа | Surface Mount |
| Thermal Protection | Thermal Shutdown |
Конфигурация выводов RTQ2533WGQV(2)
| Контакт 1 | VIN — Input voltage supply |
| Контакт 2 | VIN — Input voltage supply |
| Контакт 3 | NC — Not connected (per datasheet) |
| Контакт 4 | EN — Enable (active high) |
| Контакт 5 | NC — Not connected (per datasheet) |
| Контакт 6 | VSET — Voltage set pin (pin-selectable output) |
| Контакт 7 | NC — Not connected (per datasheet) |
| Контакт 8 | ADJ/FB — Adjust/feedback (for resistive divider mode) |
| Контакт 9 | NC — Not connected (per datasheet) |
| Контакт 10 | NC — Not connected (per datasheet) |
| Контакт 11 | PG — Power good indicator |
| Контакт 12 | NC — Not connected (per datasheet) |
| Контакт 13 | VOUT — Regulated output voltage |
| Контакт 14 | VOUT — Regulated output voltage |
| Контакт 15 | VOUT — Regulated output voltage |
| Контакт 16 | NC — Not connected (per datasheet) |
| Контакт 17 | GND — Ground |
| Контакт 18 | GND — Ground |
| Контакт 19 | GND — Ground (thermal pad region) |
| Контакт 20 | GND — Ground (exposed thermal pad) |
Типичное применение
RTQ2533WGQV(2) подходит для 6 применениеs: FPGA Core/IO Point-of-Load Regulation, Server and Networking 5 V/3.3 V POL Conversion, Audio Codec / DAC Power Rail, RF Transceiver Local Regulation, Industrial 3.3 V/5 V Point-of-Load, USB-Powered Single-Cell Li-Ion Device.
FPGA Core/IO Point-of-Load Regulation
The RTQ2533WGQV(2) provides clean point-of-load regulation for FPGA core (0.85 V) and IO (1.8 V/3.3 V) rails. The 3 A continuous current from a 3.3 V or 5 V input bus supports multi-rail FPGA designs where each voltage domain needs a dedicated regulator; pin-selectable output up to 3.95 V eliminates feedback resistors for standard FPGA voltages. Ultra-low noise of 10 uVrms at 3.3 V preserves FPGA PLL supply integrity and minimizes jitter on high-speed transceivers; the 40 dB PSRR at 500 kHz attenuates residual ripple from upstream buck converters. Place the device between the intermediate bus and the FPGA decoupling network, using 22 uF ceramic input/output caps per Richtek EVB UG2533WGQV2.
Рекомендуется
Server and Networking 5 V/3.3 V POL Conversion
The RTQ2533WGQV(2) converts a 5 V or 3.3 V intermediate bus into tightly regulated lower-voltage rails for server and networking ASICs. The 6.5 V maximum input accepts 5 V system buses directly, and 3 A output handles multi-rail SoC loads. Its pin-selectable outputs (0.8 V to 3.95 V) cover common networking voltages (1.0 V, 1.2 V, 1.8 V, 2.5 V) without external feedback components, simplifying BOM. Compared with a buck converter, the linear topology adds no switching noise to the ASIC's sensitive clocking and SERDES analog domains - critical for maintaining BER margins on 10G/25G Ethernet links.
Рекомендуется
Audio Codec / DAC Power Rail
The RTQ2533WGQV(2) supplies low-noise power for audio codecs and DACs where power rail noise directly impacts dynamic range. Its 6.8 uVrms output noise at 0.8 V and 10 uVrms at 3.3 V are well below the audibility threshold of common codec PSRR designs, ensuring clean analog domain supply. The 3 A capability supports higher-power Class-D amplifier front-end rails in multi-channel audio systems. Combined with the 1% accuracy over line/load/temperature, the part maintains channel-to-channel gain matching. Use it as a post-buck-rail LDO with input LC filter to suppress upstream switching ripple from 50 kHz to 1 MHz.
Рекомендуется
RF Transceiver Local Regulation
The RTQ2533WGQV(2) provides local regulation for RF transceivers' VCO, PLL, and PA-pre-driver rails where supply noise modulates phase and creates spurs. Its 40 dB PSRR at 500 kHz attenuates residual switching noise from upstream converters that would otherwise appear as phase-noise sidebands or reference spurs. The 3 A continuous current handles transmit-path pre-driver loads in compact RF modules. The exposed thermal pad on VQFN-20 (3.5x3.5 mm) supports sustained current without external heatsinking, valuable in size-constrained radio designs.
Рекомендуется
Industrial 3.3 V/5 V Point-of-Load
The RTQ2533WGQV(2) delivers 3 A from industrial 24 V buck-converter intermediate rails or 5 V system buses into tightly regulated 3.3 V, 2.5 V, 1.8 V, or 1.2 V supplies for industrial controllers and PLCs. The wide 1.1-6.5 V input accommodates a 3.3 V pre-regulated rail or a 5 V USB-input design, and pin-selectable output reduces BOM for high-volume industrial products. The exposed thermal pad and -40 C to +125 C operating range (per Richtek datasheet) support industrial temperature environments. Internal current limit and thermal shutdown provide field-protection against output short circuits.
Рекомендуется
USB-Powered Single-Cell Li-Ion Device
The RTQ2533WGQV(2) regulates directly from a single Li-ion cell (3.0 V to 4.2 V) or USB 5 V input into a 1.0 V to 3.3 V rail for portable SoCs and image sensors. The 1.1 V minimum input allows operation even when the Li-ion cell sags under heavy load, and 180 mV dropout supports up to 3 A from a near-depleted cell. The ultra-low 6.8 to 10 uVrms noise preserves CMOS image sensor SNR in low-light capture and avoids WiFi/BT module desensitization. Place upstream of the PMIC's LDO outputs in portable designs that need post-PMIC active filtering.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для RTQ2533WGQV(2) — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | RTQ2533WGQV | RTQ2533W | RTQ2533AGQV |
|---|---|---|---|---|
| Brand | Richtek | Richtek | Richtek | Richtek |
| Package | VQFN-20 (3.5x3.5) | VQFN-20 (3.5x3.5) - same | VQFN-20 (3.5x3.5) - same | VQFN-20 (3.5x3.5) - same |
| Input Voltage Range | 1.1 V to 6.5 V | 1.1 V to 6.5 V | 1.1 V to 6.5 V | 1.1 V to 6.5 V |
| Output Current | 3 A | 3 A | 3 A | 3 A |
| Output Voltage Range | 0.8 V to 5.5 V (resistive) / 0.8 V to 3.95 V (pin-select) | 0.8 V to 5.5 V (resistive) / 0.8 V to 3.95 V (pin-select) | 0.8 V to 5.5 V (resistive) / 0.8 V to 3.95 V (pin-select) | 0.8 V to 5.5 V (resistive) / 0.8 V to 3.95 V (pin-select) |
| Dropout Voltage (max) | 180 mV at 3 A | 180 mV at 3 A | 180 mV at 3 A | 180 mV at 3 A |
| Output Noise (3.3 V) | 10 uVrms | 10 uVrms | 10 uVrms | 10 uVrms |
| PSRR at 500 kHz | 40 dB | 40 dB | 40 dB | 40 dB |
Ключевые отличия
- Pin-selectable output up to 3.95 V without external resistors (против Standard LDOs requiring feedback resistor divider)
- 3 A continuous output in compact 3.5x3.5 mm VQFN-20 (против Comparable 3 A LDOs in larger packages (e.g., SOIC-8 exposed pad or 5x5 mm QFN))
- Ultra-low 6.8 uVrms output noise at 0.8 V (против Generic 3 A LDOs with 50-100 uVrms output noise)
Заметки по проектированию
Estimated thermal analysis: at VIN=5 V, VOUT=3.3 V, and 3 A load, the part dissipates approximately 5.1 W. The VQFN-20 (3.5x3.5 mm) package requires substantial PCB copper pour on the exposed thermal pad (at least 1 square inch on top and bottom layers with thermal vias) to maintain junction temperature below 125 C. Without thermal management, derate to 1.5 A to 2 A or use a smaller VIN-VOUT differential. Reference Richtek EVB UG2533WGQV2 for the recommended thermal layout.
Place input and output ceramic capacitors as close as possible to the IC pins (within 1-2 mm). Use a low-ESR 22 uF X7R ceramic on the input and a 22 uF X7R ceramic on the output per the Richtek reference design. Add a 0.1 uF bypass cap in parallel for high-frequency decoupling. The exposed thermal pad must be soldered to a continuous ground copper plane with thermal vias for heat extraction.
When using pin-selectable output mode (0.8 V to 3.95 V without external resistors), the VSET pin must be tied to the correct voltage according to the datasheet's pin-programming table - floating or mis-wiring VSET results in undefined output voltage or output voltage out of regulation. When using the resistive divider mode for 0.8 V to 5.5 V output, use 1% tolerance resistors for VOUT accuracy. Do not exceed the absolute maximum input voltage of 6.5 V; the part has no input TVS protection.
Информация о соответствии
All compliance values inferred from 'Lead-Free and Green' classification on Richtek product page; [DATA_NEEDED] for REACH/AEC-Q100 formal documentation. Standard commercial-grade part; not automotive-qualified.
