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Analog Devices Inc./Maxim Integrated MAX77324GEWTAD+T
- Part No.:
- MAX77324GEWTAD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-WFBGA, WLBGA
- Datasheet:
-
MAX77324GEWTAD+T.pdf
- Description:
- IC REG BUCK ADJ 1.5A 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:4,496
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Product details
Overview
MAX77324GEWTAD+T from Analog Devices is a single-channel synchronous step-down (buck) converter delivering up to 1.5A output current, operating from 2.5V–4.8V input (Li⁺ battery compatible), with adjustable 0.6V–2.0V output voltage (±2% FB accuracy), fixed 2MHz PWM switching, and 1μA shutdown current. It serves as a core power supply for ultra-compact portable systems requiring stable, high-efficiency core voltage regulation.
For engineers reviewing the MAX77324GEWTAD+T datasheet, MAX77324GEWTAD+T pinout, MAX77324GEWTAD+T application, or MAX77324GEWTAD+T equivalent, this page delivers verified electrical specs, WLP-6 package layout guidance, real-world transient performance data, and validated alternative options for space-constrained battery-powered designs.
Technical Context
The MAX77324GEWTAD+T implements Maxim's proprietary Quick-PWM™ constant-on-time control architecture optimized for fast load-transient response and wide VIN/VOUT ratios. It operates exclusively in forced PWM mode-no automatic skip-mode transition-ensuring deterministic 2MHz switching across all loads, critical for EMI-sensitive RF and sensor subsystems.
Its integrated high-side PMOS (100mΩ RDS(ON)) and low-side NMOS (50mΩ RDS(ON)) enable synchronous rectification without external diodes. Protection includes cycle-by-cycle peak current limiting (3.0A typ), active output discharge (100Ω), thermal shutdown (165°C), and UVLO (2.65V rising threshold), all implemented on-die with no external components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.5A continuous - supports full-core operation of microcontrollers and SoCs in wearables and IoT edge nodes. |
| Input Voltage Range | 2.5V to 4.8V - fully covers single-cell Li⁺ battery discharge curve (3.0V–4.2V nominal). |
| Output Voltage Range | 0.6V to 2.0V adjustable via external resistor divider - enables direct core voltage scaling for ARM Cortex-M, RISC-V, and ASIC logic rails. |
| Switching Frequency | 2MHz nominal - allows use of tiny 0603 0.47μH inductors and minimizes solution footprint to 6.89mm². |
| Efficiency (Peak) | 93% at 3.8VIN/1.8VOUT - reduces thermal load in sealed enclosures and extends battery runtime under medium-to-heavy loads. |
| Quiescent Current | Not applicable in PWM-only mode; shutdown current ≤1μA - enables multi-year shelf life in always-on sensor nodes. |
| Protection Features | UVLO, soft-start, active output discharge, cycle-by-cycle OCP, thermal shutdown - eliminates need for external supervision circuitry. |
Pinout & Package
MAX77324GEWTAD+T uses a 1.22mm × 0.85mm, 6-bump wafer-level package (WLP) with 0.4mm pitch, optimized for ultra-dense PCB layouts. Total solution area is 6.89mm² including 0603 inductor and 0402/0603 passives.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 IN | Power Input | Bypassed to PGND with 10μF ceramic capacitor; handles 2.5V–4.8V Li⁺ input; absolute max 5.5V. |
| A2 LX | Switching Node | Connects to 0.47μH inductor; internal clamp diodes to PGND/VIN; requires short/wide trace to minimize EMI. |
| A3 PGND | Power Ground | High-current return path for inductor and MOSFETs; must be connected directly to AGND on PCB. |
| B1 EN | Enable Input | Active-high logic (VEN_HI ≥1.2V); internal 500kΩ pulldown; controls startup/shutdown and initiates active discharge. |
| B2 AGND | Analog Ground | Reference for FB and internal bias circuits; tied to PGND at single point on PCB to avoid noise coupling. |
| B3 FB | Feedback Input | Senses output via resistor divider (RBOT = 30.1kΩ typical); 0.6V reference with ±2% accuracy over –40°C to +85°C. |
Key Features
| Feature | Design Value |
|---|---|
| PWM-only operation | Guarantees fixed 2MHz switching under all load conditions-enables predictable EMI filtering and avoids audible noise in audio-adjacent circuits. |
| Integrated MOSFETs | 100mΩ high-side PMOS + 50mΩ low-side NMOS eliminate external FETs and Schottky diodes, reducing BOM count and board area. |
| Active output discharge | 100Ω internal resistor from LX to PGND discharges VOUT within milliseconds upon disable-prevents back-powering of downstream logic. |
| Quick-PWM™ control | Delivers <30mV load transient deviation (0→750mA in 6µs) and <30mV line transient deviation (3.4V→2.9V in 25µs), ensuring stable core voltage during burst processing. |
| Robust protection suite | Includes UVLO (2.65V rising), thermal shutdown (165°C), cycle-by-cycle OCP (3.0A peak), and soft-start (2.34mV/µs FB ramp)-no external fault management needed. |
Applications
| Wearable Fitness Tracker | Bluetooth LE Sensor Node |
|---|---|
Use Scenario: Compact wrist-worn device powered by 3.7V Li⁺ cell, hosting MCU, accelerometer, and BLE radio. IC Role / Device Role / Timing Role: Primary core voltage regulator supplying 1.1V to ARM Cortex-M4F MCU and 1.8V to BLE transceiver. Use Value: 6.89mm² total solution size fits within 12mm × 12mm PCB area; 93% peak efficiency extends battery life beyond 7 days per charge. |
Use Scenario: Coin-cell–sized environmental sensor node with temperature/humidity sensing and periodic BLE advertising. IC Role / Device Role / Timing Role: Single-supply buck converter generating stable 1.8V rail for sensor interface and radio, enabled only during active measurement cycles. Use Value: 1μA shutdown current enables >10-year shelf life; 2MHz PWM avoids interference with 2.4GHz BLE band; EN pin enables precise power gating. |
| Industrial IoT Edge Controller | AR/VR Microdisplay Power |
Use Scenario: DIN-rail mounted gateway with Cortex-A53 SoC, Ethernet PHY, and RS-485 interface, powered from 3.3V–5V industrial supply. IC Role / Device Role / Timing Role: Point-of-load regulator stepping 4.2V down to 1.0V for SoC core domain, synchronized to system clock for noise isolation. Use Value: Fixed-frequency 2MHz operation simplifies EMI filter design; ±2% output accuracy ensures reliable SoC boot and DVFS compliance. |
Use Scenario: Near-eye display module requiring ultra-low-noise 1.2V supply for OLED microdisplay driver IC with strict ripple limits. IC Role / Device Role / Timing Role: Low-ripple core supply delivering 1.2V @ 1.2A with <10mVPP ripple in PWM mode, placed adjacent to display IC. Use Value: Synchronous rectification and 50mΩ low-side RDS(ON) minimize output impedance; 2.34mV/µs soft-start prevents display flash during power-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6286418RTER | 2.5V–5.5V input, 1.8V fixed output, 1.5A, 2.25MHz PWM-only, 0.5μA shutdown, 1.07mm × 0.77mm DSBGA-6 | Fixed 1.8V output only; no external feedback adjustment; slightly smaller package but same 6-bump WLP footprint class | Select when fixed 1.8V output suffices and lowest possible shutdown current (<0.5μA) is prioritized over adjustability. |
| RTQ2134BGQW | 2.5V–5.5V input, 0.6V–3.3V adjustable, 1.5A, 2MHz PWM-only, 1.5μA shutdown, 1.22mm × 0.85mm WLCSP-6 | Wider VOUT range (up to 3.3V); higher shutdown current (1.5μA vs. 1μA); identical package dimensions and pinout | Choose when higher output voltage capability (e.g., 3.3V I/O rail) is required alongside core voltage regulation in same footprint. |
Compared with MAX77324GEWTAD+T, TPS6286418RTER offers lower shutdown current but sacrifices output adjustability, while RTQ2134BGQW extends output voltage range to 3.3V with identical form factor-both serve distinct voltage-programming needs in space-constrained designs where PWM-only operation is mandatory.
Availability
MAX77324GEWTAD+T is available at Aetrix Electronics and suitable for wearable electronics, Bluetooth LE sensor nodes, industrial IoT edge controllers, and AR/VR microdisplay power systems requiring stable component supply and long-term production continuity.
Supply support for MAX77324GEWTAD+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and automotive markets.
The MAX77324 product line delivers ultra-small, high-efficiency buck converters for battery-powered portable and IoT devices where minimal PCB area, low quiescent power, and robust protection are non-negotiable design requirements.
FAQ
What is the key functional difference between MAX77324GEWTAD+T and MAX77324EWTAD+T?
The MAX77324GEWTAD+T operates exclusively in forced PWM mode across all load conditions, ensuring deterministic 2MHz switching and predictable EMI behavior. In contrast, MAX77324EWTAD+T automatically transitions between PWM and skip modes-improving light-load efficiency but introducing variable frequency operation. This makes MAX77324GEWTAD+T preferable for noise-sensitive RF or timing-critical applications where spectral content must remain fixed.
Does MAX77324GEWTAD+T support pre-biased output startup?
Yes, MAX77324GEWTAD+T supports pre-biased output startup. If the output voltage is already present and below the target level, the device ramps up monotonically at the preset 2.34mV/µs slew rate at the FB pin. If the pre-bias exceeds the target, no switching occurs during soft-start-preventing reverse current flow and ensuring safe integration into multi-rail power systems where sequencing is managed externally.
What is the recommended inductor for MAX77324GEWTAD+T and why?
The recommended inductor for MAX77324GEWTAD+T is HTTL25201T-R47MSRG-57 (0.47μH, 14mΩ DCR, 5A saturation). Its low DCR maximizes efficiency, its 5A saturation rating exceeds the 3.37A peak current limit, and its 2.5mm × 2.0mm footprint aligns with the ultra-compact 6.89mm² solution size target. Alternative DFE18SANR47MG0L (0.47μH, 54mΩ) is offered for minimal board area at the cost of ~3% efficiency loss.
How does the active output discharge function work in MAX77324GEWTAD+T?
In MAX77324GEWTAD+T, active output discharge engages automatically when EN is pulled low, thermal shutdown triggers, or UVLO activates. A dedicated 100Ω internal resistor connects LX to PGND, discharging the output capacitor rapidly-typically bringing VOUT below 100mV within 1–2ms. This prevents back-powering of upstream logic, avoids latch-up in cascaded regulators, and meets strict power sequencing requirements in multi-voltage systems.
Can MAX77324GEWTAD+T be used with ceramic capacitors only, and what are the key selection criteria?
Yes, MAX77324GEWTAD+T is designed for all-ceramic operation. CIN must be ≥10μF X5R/X7R (6.3V rating), placed adjacent to IN pin with low-ESR/ESL traces (<15mΩ + <2nH). COUT must be ≥22μF X5R/X7R (6.3V), selected considering DC bias derating-e.g., a 1.0mm × 0.5mm 22μF part may deliver only ~12μF at 1.8V bias. Effective capacitance, not nominal value, determines transient response and ripple performance.
MAX77324GEWTAD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 4.8V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 2V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLP (1.22x0.85)
MAX77324GEWTAD+T FAQ
1.How can I place an order for MAX77324GEWTAD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77324GEWTAD+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX77324GEWTAD+T reliable?
The price and inventory of MAX77324GEWTAD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77324GEWTAD+T is usually 5 days.
3.What payment methods are accepted for MAX77324GEWTAD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77324GEWTAD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77324GEWTAD+T?
MAX77324GEWTAD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77324GEWTAD+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX77324GEWTAD+T?
For technical support, including MAX77324GEWTAD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77324GEWTAD+T requirements.
6.How does Aetrix verify that MAX77324GEWTAD+T is sourced from the original manufacturer or authorized distributors?
All MAX77324GEWTAD+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX77324GEWTAD+T meets industry standards.
7.What is the process for return or replacement of MAX77324GEWTAD+T?
All MAX77324GEWTAD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77324GEWTAD+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX77324GEWTAD+T part is unused and in its original packaging.
Return procedure for MAX77324GEWTAD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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