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Analog Devices Inc./Maxim Integrated MAX20734EPL+T
- Part No.:
- MAX20734EPL+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 15-VFQFN, FCQFN
- Datasheet:
-
MAX20734EPL+T.pdf
- Description:
- IC REG BUCK ADJ 40A 15FCQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,706
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Product details
Overview
MAX20734EPL+T from Maxim Integrated is a fully integrated, PMBus-enabled step-down switching regulator designed for high-current point-of-load applications. It delivers up to 40A output current from a 4.5V–16V input, supports 0.6V–5.5V programmable output voltage, achieves 90.7% peak efficiency at 12VIN/1VOUT, and features valley current-mode control with fast transient response (up to 300A/μs) - used in telecom server power rails and µP VDDQ regulation.
For engineers reviewing the MAX20734EPL+T datasheet, MAX20734EPL+T pinout, MAX20734EPL+T application, or MAX20734EPL+T equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and protection behavior, and real-world selection guidance for high-density DC-DC designs requiring telemetry, sequencing, and remote sensing.
Technical Context
The MAX20734EPL+T implements a valley current-mode control architecture with fixed-frequency PWM operation (400–900kHz), dynamically adjusting switching frequency during load transients to minimize undershoot/overshoot. Its integrated high-side and low-side MOSFETs, gate drivers, precision DAC reference, and on-die current-sense circuit eliminate external sense resistors and support all-MLCC output configurations.
It uses differential remote sensing (VSENSE+/VSENSE−) with open-circuit detection, programmable soft-start (0.75–6ms), and dual-programmability via PMBus or analog R/C networks on PGMA/PGMB pins. Protection includes hiccup-mode overcurrent (OCP settings 0–3), cycle-by-cycle positive/negative OCP, programmable thermal shutdown (130°C or 150°C), and input UVLO with 350mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 16V - supports standard 5V, 12V, and intermediate bus architectures without external pre-regulation. |
| Output Current Rating | 40A max continuous - enables single-chip replacement of multi-phase controllers in space-constrained PoL designs. |
| Output Voltage Range | 0.6V to 5.5V - covers core logic (0.6–1.2V), I/O (1.8–3.3V), and auxiliary rails (5V) with ±1% VREF accuracy. |
| Peak Efficiency | 90.7% at 12VIN/1VOUT/40A - reduces thermal load in 509mm² total solution size including inductor and output capacitors. |
| Switching Frequency | 400–900kHz (PMBus-programmable) - balances EMI, inductor size, and transient response for high-speed digital loads. |
| Transient Response | Supports 300A/μs load-step transients - maintains tight regulation under CPU/GPU burst current demands. |
| PMBus Compliance | Fully compliant with SMBus 3.0 and PMBus 1.3 - enables real-time telemetry (VOUT, IOUT, TJ) and dynamic configuration in system management firmware. |
Pinout & Package
MAX20734EPL+T is housed in a 15-pin FCQFN package (5mm × 5mm, 0.5mm pitch, exposed thermal pad), outline number 21-100027, land pattern 90-100025. Thermal resistance θJA = 12°C/W (still air, no heatsink); θJC = 0.42°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSENSE+ | Remote sense positive input | Connects to load-side VOUT for Kelvin sensing; enables <±0.7% static load regulation across PCB IR drops. |
| VSENSE− | Remote sense negative input | Connects to load-side GND; differential pair rejects common-mode noise and detects open-circuit faults. |
| PGMA / PGMB | Analog programming inputs | Accept resistor-capacitor networks to set VOUT, fSW, OCP threshold, and soft-start time without PMBus interface. |
| VDDH | Main power input (4.5–16V) | Supplies high-side switch; requires local high-frequency bypass ≤60 mils away to sustain 6A average input current. |
| VX | Switching node | Connects directly to buck inductor; rated −10V to +23V (25ns pulse) - dictates layout criticality for EMI and reliability. |
| BST | Bootstrap supply for high-side driver | Requires 0.22µF ceramic capacitor to VX; enables efficient N-channel high-side MOSFET drive without external charge pump. |
| OE | Enable input with precise threshold | 0.83–0.97V rising threshold; internal 275kΩ pulldown enables power sequencing with other regulators. |
| STAT | Open-drain power-good/fault indicator | Drives low on PWRGD fault, OVP, OTP, or UVLO; blanking time programmable to 125µs or 2ms to avoid false triggers. |
| CLK / DATA / SMALERT | PMBus interface signals | 400kHz clock support; SMALERT asserts on critical faults (OVP, OTP, BST fault) for system-level alert prioritization. |
Key Features
| Feature | Design Value |
|---|---|
| Differential remote sensing with open-circuit detection | Eliminates load regulation error from PCB trace resistance and provides fault indication if sense lines disconnect. |
| Hiccup-mode overcurrent protection | Shuts down on sustained overload, then auto-retries - prevents thermal runaway while preserving system availability. |
| Valley current-mode control with adaptive frequency | Maintains stability with all-MLCC outputs and dynamically increases fSW during load steps to reduce voltage deviation. |
| Programmable thermal shutdown (130°C or 150°C) | Allows trade-off between safety margin and maximum power delivery in thermally constrained enclosures. |
| Integrated current-sense architecture | Replaces external sense resistors - reduces BOM count, improves efficiency, and avoids parasitic inductance errors. |
Applications
| Telecom Line Cards | AI Accelerator Boards |
|---|---|
Use Scenario: Powering FPGA I/O banks and SerDes transceivers on high-port-density line cards with strict thermal limits. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 1.8V/3.3V at up to 35A with remote sensing to compensate for backplane voltage drop. Use Value: 90.7% efficiency at full load reduces board-level heat by >3W vs. discrete solutions, enabling higher port density without forced air. |
Use Scenario: Supplying VDDQ to HBM2E memory stacks on GPU/AI accelerator modules requiring sub-100mV regulation window. IC Role / Device Role / Timing Role: High-bandwidth, low-noise PoL converter with 300A/μs transient response and differential sensing at memory die. Use Value: Fast transient recovery (<5µs) and ±0.7% static load regulation ensure HBM2E timing margins are maintained under burst workloads. |
| Enterprise SSD Controllers | 5G Baseband Units |
Use Scenario: Generating 1.2V core voltage for NVMe SSD controllers with aggressive power cycling and thermal throttling requirements. IC Role / Device Role / Timing Role: Digitally managed regulator using PMBus to report real-time IOUT and TJ for firmware-based thermal derating. Use Value: Programmable 130°C OTP threshold allows safe operation up to 85°C ambient with 200LFM airflow, extending SSD lifetime. |
Use Scenario: Powering RF front-end ASICs in massive MIMO baseband units where EMI and layout area are tightly constrained. IC Role / Device Role / Timing Role: Compact 5mm × 5mm regulator with 400kHz–900kHz programmable fSW to shift switching noise away from sensitive RF bands. Use Value: Single-chip integration eliminates external MOSFET drivers and sense resistors, reducing layout area by >40% vs. controller+driver solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current, PMBus-enabled buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8770GQ-Z (Monolithic Power Systems) | 40A rating, 4.5–16V input, but lacks differential remote sensing and PMBus telemetry; uses analog-only programming. | Suitable for cost-sensitive industrial PoL where telemetry and precision load regulation are not required. | Choose MP8770GQ-Z only when remote sensing and digital monitoring are unnecessary - MAX20734EPL+T provides superior accuracy and system visibility. |
| TPS546D24RUTR (Texas Instruments) | 40A, PMBus 1.3 compliant, supports 0.5–5.5V VOUT, but requires external current-sense resistor and has larger 6mm × 6mm QFN package. | Better suited for designs needing ultra-low VOUT (0.5V) or where TI's Fusion Digital Power GUI workflow is mandated. | Select TPS546D24RUTR if design already uses TI ecosystem tools; MAX20734EPL+T offers smaller footprint and integrated sensing for faster bring-up. |
Compared with MP8770GQ-Z and TPS546D24RUTR, MAX20734EPL+T uniquely combines 5mm × 5mm FCQFN packaging, integrated current sensing, differential remote sensing, and full PMBus telemetry - delivering the highest power density and lowest system-level BOM count for telecom and AI infrastructure.
Availability
MAX20734EPL+T is available at Aetrix Electronics and suitable for networking equipment, telecom line cards, and AI accelerator boards requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.
Supply support for MAX20734EPL+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
Maxim Integrated, now part of Analog Devices, designs high-performance analog and mixed-signal ICs for demanding applications in communications, computing, and industrial systems.
The MAX20734EPL+T belongs to Maxim's high-current, digitally managed power regulator family - engineered specifically for compact, telemetry-rich point-of-load conversion in datacenter, telecom, and AI hardware where efficiency, thermal performance, and system-level controllability are critical.
FAQ
What is the maximum continuous output current supported by the MAX20734EPL+T?
The MAX20734EPL+T supports up to 40A continuous output current under thermal conditions of TA = 55°C with 200LFM airflow. At 85°C ambient with no airflow, its thermal rating drops to 22A. These ratings are validated per the SOA curves in the datasheet and depend on PCB copper weight, layout, and heatsinking - the device itself is rated for 40A average output current regardless of ambient conditions.
Does the MAX20734EPL+T require an external current-sense resistor?
No, the MAX20734EPL+T does not require an external current-sense resistor. It uses Maxim's proprietary integrated current-sense technology to monitor inductor valley current directly, enabling cycle-by-cycle overcurrent protection and accurate IOUT telemetry reporting over PMBus without added component count or PCB area.
Can the MAX20734EPL+T operate with only analog programming, without PMBus?
Yes, the MAX20734EPL+T can be fully configured using analog programming via resistors and capacitors on PGMA and PGMB pins - setting output voltage, switching frequency, soft-start time, and overcurrent threshold. PMBus is optional and used for dynamic reconfiguration, telemetry, and fault logging during system operation.
What is the purpose of the VSENSE+ and VSENSE− pins on the MAX20734EPL+T?
The VSENSE+ and VSENSE− pins implement differential remote sensing to measure output voltage directly at the load, compensating for IR drop across PCB traces and connectors. This ensures ±0.7% static load regulation accuracy and includes open-circuit detection - if either pin floats or shorts, the STAT pin asserts fault and regulation halts.
How does the MAX20734EPL+T handle overtemperature conditions?
The MAX20734EPL+T features programmable overtemperature protection with default trip point at 150°C junction temperature, adjustable to 130°C via PMBus. Upon triggering, it shuts down, drives STAT low, and auto-restarts after cooldown - hysteresis is 10°C. This behavior is confirmed in the Electrical Characteristics table and protects against thermal runaway in enclosed systems.
MAX20734EPL+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 15-VFQFN, FCQFN
- 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):
- 4.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 40A
- Frequency - Switching:
- 400kHz ~ 900kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-FCQFN (9x4.15)
MAX20734EPL+T FAQ
1.How can I place an order for MAX20734EPL+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20734EPL+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 MAX20734EPL+T reliable?
The price and inventory of MAX20734EPL+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20734EPL+T is usually 5 days.
3.What payment methods are accepted for MAX20734EPL+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20734EPL+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20734EPL+T?
MAX20734EPL+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20734EPL+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 MAX20734EPL+T?
For technical support, including MAX20734EPL+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20734EPL+T requirements.
6.How does Aetrix verify that MAX20734EPL+T is sourced from the original manufacturer or authorized distributors?
All MAX20734EPL+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 MAX20734EPL+T meets industry standards.
7.What is the process for return or replacement of MAX20734EPL+T?
All MAX20734EPL+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20734EPL+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 MAX20734EPL+T part is unused and in its original packaging.
Return procedure for MAX20734EPL+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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