RTQ2183-QA - 3A 5.5V Automotive Sync Buck Converter | Richtek
Référence : RTQ2183-QA ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.65 | $16,50 |
| 100 | $1.38 | $138,00 |
| 500 | $1.15 | $575,00 |
| 1 000 | $0.98 | $980,00 |
| 3 000 | $0.84 | $2 520,00 |
RTQ2183-QA Présentation
A synchronous buck (step-down) converter is a switching DC-DC topology that uses a high-side MOSFET, a low-side synchronous rectifier, an LC output filter, and a control loop to deliver a lower regulated voltage from a higher input rail with high efficiency. Synchronous designs replace the traditional Schottky rectifier with a low-RDS(on) MOSFET to reduce conduction losses, and the RTQ2183-QA integrates both FETs inside the package for the smallest possible footprint. ACOT® (Advanced Constant On-Time) is Richtek's proprietary control architecture that delivers fast transient response without requiring loop compensation, making the part well-suited to point-of-load applications where the load steps quickly.
Key specifications include 3 A continuous output current, 2.5 V to 5.5 V input range, 0.6 V to 3.3 V adjustable output, 2.4 MHz nominal switching frequency, and integrated 65 mΩ/35 mΩ MOSFETs. Comprehensive protection is built in: input undervoltage-lockout (UVLO), output undervoltage protection (UVP), output overvoltage protection (OVP), overcurrent protection (OCP) with cycle-by-cycle current limit, and over-temperature protection (OTP). The part is AEC-Q100 qualified for automotive environments.
The ACOT® control loop eliminates the external compensation network typically required by peak-current-mode or voltage-mode buck converters, simplifying PCB layout and reducing BOM count. The 2.4 MHz switching frequency enables a 1 µH inductor and small ceramic output capacitors, allowing a complete 3 A point-of-load solution under 25 mm². Soft-start is internally trimmed to limit inrush current during power-up, and the device supports 100% duty-cycle operation for low-dropout conditions at VIN close to VOUT.
Typical applications include automotive infotainment systems, ADAS camera/sensor rails, body electronics, USB Type-C VBUS buck regulation, and industrial 5 V distributed-bus point-of-load converters. The wide VIN range also covers USB-PD source applications, portable instrumentation, and FPGA/CPU core rails powered from a single Li-ion cell.
When designing with this device, place the input ceramic capacitor within 2 mm of the VIN and PGND pins to suppress switching-node ringing, and keep the feedback trace away from the SW node to avoid noise coupling. The exposed pad must be soldered to a continuous ground plane to meet the thermal rating at 3 A continuous load.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, providing engineers with verified guidance for automotive buck-converter selection and PCB implementation.
Alternatives de remplacement direct pour RTQ2183-QA — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec RTQ2183-QA (même facteur de forme et même empreinte) — différant par Input Voltage Range, Output Voltage Range, Package, Soft Start, Topology.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
RTQ2183TN-QAA
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
RTQ2182-QA
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
RTQ2184-QA
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TPS62840DLCR
✅ Remplacement direct✓ En stock
$1.21 / unité
Voir la fiche technique →LMR54406
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
RTQ2183-QA Valeurs maximales et caractéristiques électriques
| Topologie | Synchronous Buck (Step-Down) Converter |
| Plage de tension d'entrée | 2.5 V to 5.5 V |
| Plage de tension de sortie | 0.6 V to 3.3 V (adjustable) |
| Continuous Output Current | 3 A |
| Fréquence de commutation | 2.4 MHz (nominal) |
| Control Architecture | ACOT® (Advanced Constant On-Time) |
| High-Side MOSFET RDS(on) | 65 mΩ |
| Low-Side MOSFET RDS(on) | 35 mΩ |
| High-Side MOSFET Type | Integrated N-channel |
| Low-Side MOSFET Type | Integrated N-channel synchronous rectifier |
| Boîtier | WET-VDFN-8J2L 2x1.5 mm (FC, flip-chip) |
| Type de montage | Surface Mount |
| Nombre de broches | 8 |
| AEC-Q100 Qualification | Qualified (automotive grade) |
| Protection Features | UVLO, UVP, OVP, OCP (cycle-by-cycle), OTP |
| Démarrage progressif | Internal |
| Statut RoHS | Compliant |
Configuration des broches de RTQ2183-QA
| Broche 1 | PGND — Power ground for low-side synchronous MOSFET |
| Broche 2 | VIN — Input supply voltage (2.5 V to 5.5 V) |
| Broche 3 | EN — Enable input (active-high) |
| Broche 4 | FB — Feedback voltage input for output regulation |
| Broche 5 | GND — Analog signal ground |
| Broche 6 | BST — Bootstrap for high-side gate driver |
| Broche 7 | SW — Switching node (connected to external inductor) |
| Broche 8 | VOUT — Output voltage sense / power output |
Applications typiques
RTQ2183-QA convient pour 6 applications: Automotive Infotainment System Power, ADAS Camera and Sensor Power Rails, Automotive Body Electronics, USB Type-C VBUS Buck Regulation, Industrial 5V Distributed-Bus Point-of-Load, Portable Battery-Powered Devices.
Automotive Infotainment System Power
The RTQ2183-QA's AEC-Q100 qualification and 2.5 V to 5.5 V input range make it ideal for automotive infotainment rails that step down from a 5 V system supply. Its 3 A continuous output current supports SoC core rails, audio DSP power, and display backlight drivers simultaneously. The 2.4 MHz switching frequency places fundamental and harmonic noise above the AM radio band, eliminating interference with AM broadcast reception - a critical requirement for automotive OEMs. ACOT® control delivers fast transient response to the rapidly varying loads typical of audio playback and touch-screen interaction. The WET-VDFN-8J2L 2x1.5 mm flip-chip package enables routing on the dense multilayer boards used behind head-unit displays.
Recommandé
ADAS Camera and Sensor Power Rails
Advanced Driver Assistance Systems require low-noise, stable power for CMOS image sensors, radar MMICs, and LiDAR receivers. The RTQ2183-QA provides 3 A from a 5 V automotive bus to generate sensor rails such as 1.8 V, 2.8 V, or 3.3 V with tight regulation thanks to ACOT® control. The integrated 65 mΩ/35 mΩ MOSFETs minimize conduction losses, keeping the part within thermal limits even in sealed camera housings with limited airflow. Cycle-by-cycle overcurrent protection and output OVP/UVP protect sensitive image sensors from supply transients during fault events. AEC-Q100 Grade 1/2 qualification ensures the part operates reliably across automotive temperature profiles.
Recommandé
Automotive Body Electronics
Body control modules (BCMs) require compact, efficient buck regulators to power interior lighting, mirror controllers, seat adjustment motors, and HVAC actuators from the 12 V/5 V automotive bus. The RTQ2183-QA's 2.5 V to 5.5 V input range aligns directly with 5 V regulated body domains, while its 3 A output supports multiple downstream loads on a single converter. The WET-VDFN-8J2L package is small enough for the densely populated BCM PCBs where board area is at a premium. Integrated OCP, OVP, UVP, and OTP features minimize external protection circuitry, reducing BOM cost and PCB complexity for high-volume body electronics programs.
Recommandé
USB Type-C VBUS Buck Regulation
USB Type-C ports in automotive head units and rear-seat entertainment systems require a downstream buck regulator to convert VBUS (5 V nominal) to lower voltages for protocol controllers, MUXes, and cable compensations. The RTQ2183-QA operates directly from USB VBUS (2.5 V to 5.5 V input) and delivers 3 A at adjustable outputs from 0.6 V to 3.3 V. The 2.4 MHz switching frequency stays above the USB 2.0 high-speed data band edges, minimizing conducted and radiated EMI. ACOT® control handles the load steps encountered when USB devices negotiate higher current contracts without output voltage droop.
Recommandé
Industrial 5V Distributed-Bus Point-of-Load
Industrial PLCs, factory automation controllers, and HMI panels distribute 5 V across backplanes and require local point-of-load converters for 3.3 V, 1.8 V, and 1.2 V rails. The RTQ2183-QA's 2.5 V to 5.5 V input range and 0.6 V to 3.3 V adjustable output cover all common logic-rail conversions at 3 A continuous current. ACOT® control eliminates external compensation, simplifying design and shortening time-to-market for industrial platforms. The AEC-Q100 automotive grade provides additional margin in industrial environments with wide temperature swings and electrical noise.
Recommandé
Portable Battery-Powered Devices
Portable instruments, handheld scanners, and battery-powered IoT edge devices using single-cell Li-ion or Li-polymer batteries benefit from the RTQ2183-QA's 2.5 V input minimum (battery cutoff voltage) and high efficiency from integrated synchronous rectification. The 2.4 MHz switching frequency enables a 1 µH inductor, reducing total solution height to under 1.5 mm for ultra-thin portable form factors. The WET-VDFN-8J2L package occupies only 3 mm² of PCB area. Internal soft-start limits inrush current, protecting battery cells from voltage droop during power-up.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour RTQ2183-QA — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | RTQ2183TN-QAA | RTQ2182-QA | RTQ2184-QA | TPS62840 | LMR54406 |
|---|---|---|---|---|---|---|
| Brand | Richtek | Richtek | Richtek | Richtek | Texas Instruments | Texas Instruments |
| Package | WET-VDFN-8J2L 2x1.5 mm | WET-VDFN-8J2L 2x1.5 mm - same | WET-VDFN-8J2L 2x1.5 mm - same | WET-VDFN-8J2L 2x1.5 mm - same | QFN-6 (DDC) 2x1.5 mm | QFN-6 (DBV) 2x1.5 mm |
| Output Current | 3 A | 3 A | 2 A (-33%) | 4 A (+33%) | 0.75 A (-75%) | 4 A (+33%) |
| Input Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 1.8 V to 6.5 V (wider) | 4 V to 36 V (much wider) |
| Switching Frequency | 2.4 MHz | 2.4 MHz | 2.4 MHz | 2.4 MHz | 1.8 MHz to 4 MHz | Up to 2.1 MHz |
| Control Architecture | ACOT® | ACOT® | ACOT® | ACOT® | DCS-Control (similar fast transient) | COT (Constant On-Time) |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | No (industrial) | No (industrial) |
Principaux différenciateurs
- AEC-Q100 qualified automotive grade (vs TPS62840)
- Higher output current at same footprint (vs RTQ2182-QA)
- Smaller, more integrated solution vs TI counterparts (vs LMR54406)
Notes de conception
Place the input ceramic capacitor within 2 mm of the VIN and PGND pins to minimize high-frequency switching-loop inductance. Use a 22 µF X7R or X5R 6.3 V ceramic cap on VIN, and route a wide PGND copper pour directly to the exposed pad. The exposed pad must be soldered to a continuous ground plane on the top layer with multiple thermal vias to inner ground layers to meet the 3 A thermal rating.
Estimated: at VIN = 5 V, VOUT = 3.3 V, IOUT = 3 A, efficiency is approximately 92-94%. Power dissipation is therefore around 0.18-0.25 W, which is manageable in the WET-VDFN-8J2L package on a standard 4-layer PCB. At VIN = 5 V, VOUT = 1.0 V (high step-down ratio), efficiency drops to ~85% and dissipation rises to ~0.53 W; ensure adequate copper area or forced airflow. For sustained 3 A operation, junction temperature must stay below 125°C - verify with measured theta_JA on your specific PCB layout.
Do not route the feedback (FB) trace near the SW node or under the inductor - noise coupling can cause output voltage instability and audible switching noise in audio applications. Keep the FB trace short and routed over a continuous ground plane. The bootstrap capacitor on BST must use a 0.1 µF ceramic placed as close to the BST and SW pins as possible; an undersized or misplaced bootstrap cap causes high-side gate-drive loss and reduced efficiency.
The 2.4 MHz fundamental switching frequency sits just above the AM broadcast band (530 kHz to 1710 kHz), reducing AM-band conducted and radiated EMI. To further minimize EMI, use shielded inductors with low DCR, place the input capacitor return directly to the PGND copper pour, and consider a small RC snubber (1 Ω + 100 pF) on the SW node if radiated emissions exceed target limits during pre-compliance testing.
Informations de conformité
AEC-Q100 qualified for automotive applications. RoHS and REACH compliant per Richtek product page. Halogen-free packaging. Conflict-minerals declaration available on request.
