MPQ3431AGL-AEC1-Z - 21A Synchronous Boost Converter | MPS | AEC-Q100
Référence : MPQ3431AGL-AEC1-Z ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $5.12 | $5,12 |
| 10 | $4.61 | $46,10 |
| 100 | $4.1 | $410,00 |
| 500 | $3.69 | $1 845,00 |
| 1 000 | $3.28 | $3 280,00 |
MPQ3431AGL-AEC1-Z Présentation
A boost converter (also called a step-up converter) is a switching DC-DC power topology that produces an output voltage higher than its input voltage by storing energy in an inductor during the switch-on phase and releasing it into the load during the switch-off phase. Synchronous boost converters replace the conventional Schottky rectifier with a low-side MOSFET, which dramatically reduces conduction losses and improves efficiency at high output currents. The MPQ3431A occupies the power management IC (PMIC) tier within the DC-DC switching regulator family, which itself sits under the broader power management umbrella for battery-powered and automotive electrical systems.
Key headline specifications include a 21 A switch current capability, a fixed 450 kHz switching frequency, a wide 2.7 V to 13 V start-up input range, an adjustable output voltage from 0.8 V upward, and a selectable MODE pin that allows the user to choose pulse-skip mode (PSM), forced continuous conduction mode (FCCM), or ultrasonic mode (USM) under light-load conditions. The integrated low-side MOSFET also handles cycle-by-cycle inductor peak current limiting, eliminating the need for an external sense resistor.
The device adopts constant-off-time (COT) control topology, which provides fast transient response to load steps - a critical advantage over traditional voltage-mode or current-mode PWM controllers in automotive load-dump and cold-crank scenarios. The configurable input current limit provides accurate overload protection from a misbehaving upstream supply, while the high-side and low-side MOSFET integration simplifies PCB layout and reduces bill-of-materials cost. The 3 mm x 4 mm PowerVQFN package with an exposed thermal pad supports continuous high-current operation with proper PCB thermal design.
Typical applications include automotive front-camera power, infotainment USB-PD rails, eCall backup supplies, ADAS sensor biasing, and 12 V battery-to-boosted rails for audio amplifiers. The AEC-Q100 Grade 1 qualification makes the part especially suitable for under-hood and safety-relevant automotive subsystems.
Designers should pay particular attention to inductor selection - the constant-off-time topology with a 450 kHz nominal frequency pair well with 1-3 µH power inductors rated for at least 25 A saturation current. The MODE pin must be tied high, low, or left floating according to the desired light-load behavior.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet to accelerate automotive power design.
Alternatives de remplacement direct pour MPQ3431AGL-AEC1-Z — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MPQ3431AGL-AEC1-P
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MPQ3431C-AEC1-Z
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MPQ3431AGL-AEC1-Z Valeurs maximales et caractéristiques électriques
| Topologie | Synchronous Boost (Step-Up) |
| Type de sortie | Adjustable (>=0.8 V) |
| Switch Current | 21 A |
| Input Voltage Range (Start-up) | 2.7 V to 13 V |
| Fréquence de commutation | 450 kHz (typical, fixed) |
| Control Topology | Constant-Off-Time (COT) |
| Light-Load Modes | PSM / FCCM / USM (selectable via MODE pin) |
| Input Current Limit | Configurable |
| Integrated Switches | High-side and low-side MOSFETs |
| Boîtier | QFN-13 (3 mm x 4 mm) PowerVQFN |
| Type de montage | Surface Mount |
| Automotive Qualification | AEC-Q100 Qualified |
| Statut RoHS | Compliant |
Configuration des broches de MPQ3431AGL-AEC1-Z
| Broche 1 | SW — Switch node - connection to the power inductor |
| Broche 2 | SW — Switch node - connection to the power inductor |
| Broche 3 | SW — Switch node - connection to the power inductor |
| Broche 4 | BST — Bootstrap supply for the high-side gate driver |
| Broche 5 | VIN — Input supply voltage (2.7 V to 13 V) |
| Broche 6 | EN — Enable input (active-high) |
| Broche 7 | MODE — Mode select: PSM / FCCM / USM |
| Broche 8 | FB — Feedback for adjustable output voltage |
| Broche 9 | ILIM — Configurable input current limit setting |
| Broche 10 | AGND — Analog ground |
| Broche 11 | PGND — Power ground |
| Broche 12 | VCC — Internal LDO output for gate drivers |
| Broche 13 | PGND — Power ground (thermal pad) |
Applications typiques
MPQ3431AGL-AEC1-Z convient pour 6 applications: Automotive Front-Camera Power Supply, In-Vehicle Infotainment USB-PD Boost Rail, eCall Backup Power Supply, ADAS Sensor Bias Rail, Class-D Audio Amplifier Boost Supply, Industrial 12 V to 24 V Boost Converter.
Automotive Front-Camera Power Supply
Front-camera modules need a stable 5 V to 9 V rail derived from the vehicle's 12 V battery, and the MPQ3431AGL-AEC1-Z delivers this with 21 A headroom and AEC-Q100 Grade 1 reliability. The synchronous topology maintains >95 percent efficiency at typical camera loads of 1-2 A, reducing thermal stress in the sealed camera housing. Configurable input current limit protects the upstream wiring harness from short-to-ground faults, while COT control provides fast transient response to load steps when the camera ISP wakes from standby. The 3 mm x 4 mm PowerVQFN footprint fits inside space-constrained camera modules behind the windshield.
Recommandé
In-Vehicle Infotainment USB-PD Boost Rail
Automotive USB-PD ports often need to boost the 12 V battery rail up to 20 V for fast-charging-capable sink devices. The MPQ3431AGL-AEC1-Z handles this boost conversion with 21 A peak capability, supporting full 100 W USB-PD profiles without saturating the internal MOSFETs. The selectable ultrasonic mode (USM) keeps the switching frequency above 20 kHz at light load, eliminating audible noise in the cabin during standby. AEC-Q100 qualification ensures the rail survives load-dump transients up to the automotive grade maximum, while the integrated low-side MOSFET removes the need for an external Schottky diode.
Recommandé
eCall Backup Power Supply
eCall systems must remain functional for several minutes after a crash, when the main battery may be disconnected or severely depleted. The MPQ3431AGL-AEC1-Z boosts the backup supercapacitor or small Li-ion reserve up to the 3.3 V to 5 V rail that powers the cellular modem and GPS receiver. Its 2.7 V minimum start-up voltage allows operation from nearly-depleted reserves, while the wide 2.7 V to 13 V input range tolerates the variable voltage of a damaged battery. The constant-off-time control guarantees fast response when the eCall system wakes and demands sudden inrush current to transmit emergency data.
Recommandé
ADAS Sensor Bias Rail
Radar, lidar, and camera ADAS sensors require low-noise, high-current bias rails that remain stable across temperature extremes and supply transients. The MPQ3431AGL-AEC1-Z provides a clean boosted rail from the 12 V vehicle bus, with the synchronous topology minimizing conducted noise that could couple into sensitive RF or photonic analog front ends. AEC-Q100 Grade 1 qualification guarantees operation from -40 C to +125 C, which is essential for under-hood or behind-bumper mounting. Configurable input current limit enables compliance with vehicle harness current budgets while protecting against wiring faults.
Recommandé
Class-D Audio Amplifier Boost Supply
Automotive Class-D audio amplifiers typically operate from a boosted 18 V to 24 V rail to deliver higher output power to door and seat speakers. The MPQ3431AGL-AEC1-Z drives this boost rail at 21 A peak with >94 percent efficiency, reducing wasted heat in the head unit chassis. The fixed 450 kHz switching frequency is above the AM radio band, minimizing conducted emissions that would otherwise require additional filtering. Pulse-skip mode (PSM) at idle reduces quiescent current, extending battery life during accessory-off parking scenarios.
Recommandé
Industrial 12 V to 24 V Boost Converter
Beyond automotive, the MPQ3431AGL-AEC1-Z also fits industrial applications that need to step a 12 V bus up to 24 V for motor drivers, solenoid actuators, or LED lighting strings. Its 21 A switch current supports multi-amp continuous loads without external MOSFET paralleling, while COT control handles the abrupt current changes typical of solenoid and motor loads. The QFN-13 PowerVQFN package provides good thermal dissipation when reflow-soldered to a 2 oz copper pour, sustaining industrial ambient temperatures with adequate margin above the part's thermal shutdown threshold.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MPQ3431AGL-AEC1-Z — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MPQ3431AGL-AEC1-P | MPQ3431C-AEC1-Z |
|---|---|---|---|
| Package | QFN-13 (3x4) PowerVQFN | QFN-13 (3x4) - same | QFN-13 (3x4) - same |
| Brand | Monolithic Power Systems | Monolithic Power Systems | Monolithic Power Systems |
| Switch Current | 21 A | 21 A | 21 A |
| Switching Frequency | 450 kHz | 450 kHz | 450 kHz |
| Input Voltage Range | 2.7 V to 13 V | 2.7 V to 13 V | 2.7 V to 13 V |
| Control Topology | COT | COT | COT |
| Current Limit Type | Configurable Input Current Limit | Configurable Input Current Limit | Configurable Peak Switching Current Limit |
| Light-Load Modes | PSM / FCCM / USM | PSM / FCCM / USM | PSM / FCCM / USM |
| AEC-Q100 Qualified | Yes | Yes | Yes |
| Topology | Synchronous Boost | Synchronous Boost | Synchronous Boost |
Principaux différenciateurs
- Configurable input current limit protects upstream harness (vs MPQ3431C-AEC1-Z)
- Pin-compatible packaging for tray assembly (vs MPQ3431AGL-AEC1-P)
- AEC-Q100 Grade 1 automotive qualification (vs Commercial-grade boost converters)
Notes de conception
At VIN=5 V, VOUT=12 V, and IOUT=5 A, the part dissipates approximately (12 V - 5 V) x 5 A / efficiency = ~38 W of input power minus 25 W of output, leaving roughly 13 W to manage as heat. The PowerVQFN-13 (3x4) package must be reflow-soldered to a minimum 1 square inch of 2 oz copper pour to keep the junction below the 125 C automotive limit. Estimated: a JEDEC 4-layer 1 oz board with no extra copper would exceed thermal limits at >4 A continuous output.
Place the input ceramic capacitor (>=22 uF X7R 25 V) directly between VIN (pin 5) and PGND (pins 11/13) using the shortest possible loop. The bootstrap capacitor between BST and SW must be a 100 nF X7R placed within 2 mm of pins 4 and 1. The MODE pin should be tied high, low, or left floating per the datasheet; a 100 kOhm pulldown to AGND is recommended for noise immunity in automotive environments.
Do not operate the MPQ3431AGL-AEC1-Z with input voltages above 13 V during start-up - the absolute maximum is rated for brief transients only. The MODE pin is sampled at power-up and changes during operation require a power cycle. The configurable input current limit is set by a resistor to AGND; leaving ILIM floating disables the input current limit and risks fuse or wiring harness damage in automotive fault scenarios.
The fixed 450 kHz switching frequency falls within the AM radio band; for automotive head units sensitive to AM interference, route the boost converter input away from the antenna feed and add a pi-filter (LC) at the input. The synchronous topology minimizes the high-frequency ringing typical of asynchronous boost converters, but the SW-node dV/dt still requires careful PCB layout to avoid common-mode emissions on the output cable harness.
Informations de conformité
AEC-Q100 Grade 1 qualified per MPS product page. RoHS and REACH compliant per DigiKey product listing. Halogen-free per MPS environmental compliance statement.
