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Analog Devices Inc./Maxim Integrated MAX17004AETJ+
- Part No.:
- MAX17004AETJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX17004AETJ+.pdf
- Description:
- MAX17004 HIGH-EFFICIENCY, QUAD-O
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX17004AETJ+ from Maxim Integrated is a dual step-down, synchronous switch-mode power-supply controller for main 5V/3.3V generation in battery-powered systems, featuring 40/60 interleaving, 200kHz/300kHz/500kHz selectable switching frequency, 6V–26V input range, and integrated 5V/100mA LDO regulator. It enables high-efficiency, low-noise operation in notebook computers and subnotebooks.
For engineers reviewing the MAX17004AETJ+ datasheet, MAX17004AETJ+ pinout, MAX17004AETJ+ application, or MAX17004AETJ+ equivalent, key selection criteria include interleaved ripple reduction, dual-mode feedback (fixed/adjustable outputs), soft-start/soft-discharge sequencing, lossless DCR current sensing support, and thermal/undervoltage fault protection - all in a 32-pin 5mm × 5mm thin QFN package.
Technical Context
The MAX17004AETJ+ implements fixed-frequency, current-mode control with optimal 40/60 phase shift between its two SMPS channels, minimizing input ripple down to 8.3V input before duty-cycle overlap occurs. Its architecture supports both resistor-based and lossless inductor DCR current sensing via dedicated CSH_/CSL_ inputs.
It integrates three independent regulation paths: dual synchronous buck controllers (3.3V/5V), an internal 5V/100mA LDO (bypassed to 200mA when active), and an auxiliary linear-regulator driver (DRVA/FBA) supporting adjustable outputs from 1V to 12V using external PNP transistors. Independent ON3/ON5 enables flexible power sequencing with delayed startup capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 26V - supports 2–4 Li+ cell battery packs and wide-input industrial rails without external pre-regulation. |
| Switching Frequency | 200kHz / 300kHz / 500kHz (FSEL-selectable) - balances efficiency, EMI, and inductor size across load conditions. |
| Output Voltage Accuracy | ±0.75% at 2V reference - ensures tight regulation for sensitive logic supplies in notebooks and PDAs. |
| Quiescent Supply Current | 8µA shutdown, 65–120µA standby - extends battery life during system sleep states. |
| Thermal Shutdown Threshold | +160°C with 15°C hysteresis - protects against sustained overload in compact thermal environments. |
| Current-Sense Threshold | 50mV (fixed) or adjustable 94–215mV (ILIM-controlled) - enables precise peak-current limiting with either sense resistors or DCR sensing. |
| Soft-Start Ramp Time | 2ms - limits inrush current during power-up, preventing voltage droop on shared input rails. |
Pinout & Package
MAX17004AETJ+ is housed in a 32-pin, 5mm × 5mm thin QFN package with exposed thermal pad (T3255-4). The backside pad must be soldered to PCB ground for optimal thermal performance in high-power keep-alive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ONA | Auxiliary LDO enable | Active-high control for secondary linear regulator (e.g., 12V or 1V output); disables OUTA and feedback when low. |
| DRVA | Auxiliary LDO base driver | Drives external PNP transistor base; supports adjustable outputs from 1V to 12V with external components. |
| ILIM | Current-limit threshold adjust | Sets peak current limit from 50mV (default) to 215mV via voltage divider; enables precision overcurrent protection. |
| SHDN | Global shutdown control | Reduces supply current to 8µA when pulled below 1.04V; supports programmable UVLO via resistive divider. |
| ON3 / ON5 | Independent SMPS enable inputs | Enable/disable 3.3V and 5V buck regulators separately; connecting to REF enables delayed startup sequencing. |
| FB3 / FB5 | Feedback inputs | Support Dual Mode™: connect to LDO5 for fixed 3.3V/5V outputs, or use 2.0V reference for adjustable 2.0–5.5V range. |
| CSH3/CSL3 & CSH5/CSL5 | Current-sense differential inputs | Accept either precision shunt resistor or lossless inductor DCR sensing; support bidirectional current monitoring. |
| BST3/BST5 | Bootstrap capacitor connections | Supply gate-drive voltage for DH3/DH5 high-side drivers; internal BST switches reduce external component count. |
| PGDALL | Global power-good output | Open-drain signal asserting when both SMPS outputs are within ±10% regulation; includes hysteresis and fault blanking. |
Key Features
| Feature | Design Value |
|---|---|
| 40/60 Optimal Interleaving | Reduces input ripple current by >50% vs. 180° out-of-phase designs, enabling smaller input capacitors and extending low-input operation to 8.3V. |
| Dual Mode™ Feedback | Single-pin configuration (FB3/FB5 tied to LDO5 or floating) selects between factory-trimmed 3.3V/5V outputs or user-adjustable 2.0–5.5V range. |
| Low-Noise Pulse-Skipping Mode | SKIP = REF enables automatic transition to forced-PWM at light loads, keeping switching frequency outside audible range (<20kHz) while maintaining >85% efficiency at 1mA. |
| Integrated 5V/100mA LDO with Bootstrap Switch | Powers internal circuitry and gate drivers; automatically bypasses to 200mA when main SMPS is regulating - eliminates need for external bias supply. |
| Soft-Start & Soft-Discharge | Voltage ramp control prevents inrush current at startup and avoids negative voltage dips during shutdown - critical for FPGA and DDR memory power sequencing. |
Applications
| Mobile Notebook Power Management | Subnotebook Main Supply |
|---|---|
|
Use Scenario: Primary 3.3V/5V power generation for CPU core logic, chipset I/O, and display interface in 12–20W portable systems. IC Role / Device Role / Timing Role: Dual-channel synchronous buck controller with interleaved timing and independent enable/control for sequenced rail activation. Use Value: 40/60 interleaving reduces input capacitance by 40% vs. conventional 180° designs, saving board space and cost in ultra-thin form factors. |
Use Scenario: Compact, high-efficiency main power solution for fanless subnotebooks with strict thermal and acoustic constraints. IC Role / Device Role / Timing Role: Dual-output SMPS controller with low-noise SKIP mode and soft-discharge to meet <25dB acoustic noise requirements. Use Value: Forced-PWM at light loads eliminates audible coil whine while maintaining >90% efficiency at 10mA - essential for silent operation. |
| Li+ Battery-Powered PDA | Mobile Communicator Baseband Power |
|
Use Scenario: Main system supply in handheld PDAs with 2–4-cell Li+ batteries and dynamic load profiles (touchscreen, wireless, UI). IC Role / Device Role / Timing Role: High-efficiency dual-buck controller with independent ON3/ON5 sequencing and PGDALL fault aggregation. Use Value: 8µA shutdown current extends standby time to >30 days on typical 2000mAh battery; undervoltage/thermal protection prevents brownouts. |
Use Scenario: Power delivery for baseband processors and RF front-end in mobile communicators requiring fast transient response. IC Role / Device Role / Timing Role: Synchronous buck controller with 2ms soft-start and 10µs fault propagation delay for rapid fault containment. Use Value: 10µs overvoltage/undervoltage fault detection (MAX17003A) and 1µs PGDALL propagation ensure safe shutdown before IC damage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17003AETJ+ | Includes output overvoltage-fault protection (OVP); identical pinout, specs, and package. | OVP required for safety-critical 5V rail monitoring in medical or industrial notebooks. | Select MAX17003AETJ+ only if OVP is mandated; otherwise MAX17004AETJ+ offers same functionality at lower cost. |
| RT8205AZSP | Single 5V/3.3V dual-buck controller with 300kHz fixed frequency; no interleaving, no DCR sensing, no auxiliary LDO driver. | Limited to simpler, lower-cost notebooks without advanced sequencing or low-noise requirements. | Choose RT8205AZSP for cost-sensitive designs where 40/60 interleaving, soft-discharge, and DRVA-driven auxiliary outputs are unnecessary. |
Compared with MAX17003AETJ+, the MAX17004AETJ+ omits overvoltage protection but retains full interleaving, DCR sensing, and auxiliary LDO driver capability - making it ideal for mainstream notebooks where cost and feature balance outweigh OVP necessity. Against RT8205AZSP, MAX17004AETJ+ delivers superior ripple suppression, acoustic performance, and design flexibility at moderate BOM cost increase.
Availability
MAX17004AETJ+ is available at Aetrix Electronics and suitable for notebook computers, subnotebooks, and Li+-powered mobile communicators requiring stable component supply, long-term lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX17004AETJ+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for computing, communications, and industrial markets.
The MAX17003A/MAX17004A product line was designed specifically for high-efficiency, quad-output main power supplies in space-constrained, battery-powered notebook platforms - emphasizing thermal efficiency, acoustic noise control, and robust fault management.
FAQ
What is the key functional difference between MAX17004AETJ+ and MAX17003AETJ+?
The MAX17004AETJ+ lacks output overvoltage-fault protection (OVP), which is present in the MAX17003AETJ+. All other specifications - including pinout, 40/60 interleaving, dual-mode feedback, soft-start/soft-discharge, and thermal/undervoltage protection - are identical between the two devices. Therefore, MAX17004AETJ+ is functionally equivalent to MAX17003AETJ+ except for the absence of OVP circuitry, making it suitable for applications where OVP is not required.
Does MAX17004AETJ+ support lossless current sensing using inductor DCR?
Yes, MAX17004AETJ+ supports lossless inductor DCR current sensing via its dedicated CSH3/CSL3 and CSH5/CSL5 differential inputs. When configured with appropriate RC networks per Maxim's application notes, the device accurately measures inductor current without adding shunt resistor losses - improving efficiency and thermal performance in high-current notebook power rails.
How does the 40/60 interleaving in MAX17004AETJ+ improve system-level design?
The 40/60 interleaving in MAX17004AETJ+ reduces input ripple current amplitude by over 50% compared to conventional 180° out-of-phase dual buck controllers. This allows designers to use smaller input bulk capacitors, achieve lower EMI emissions, and extend minimum operational input voltage down to 8.3V - directly enabling longer runtime from partially discharged Li+ battery packs in notebook applications.
Can MAX17004AETJ+ generate a 12V auxiliary supply?
Yes, MAX17004AETJ+ can generate a 12V auxiliary supply using its DRVA pin and external PNP transistor. By connecting DRVA to the base of a PNP pass transistor and referencing FBA to the output, the device regulates VOUTA to 12V - provided the input voltage exceeds 12.5V and the external components meet layout and thermal requirements outlined in the MAX17004AETJ+ evaluation kit documentation.
What is the purpose of the PGDALL pin on MAX17004AETJ+?
The PGDALL pin on MAX17004AETJ+ is an open-drain power-good output that asserts low when either the 3.3V or 5V SMPS output falls outside its regulation window (±10%). It provides system-level fault aggregation and sequencing control, enabling host processors or PMICs to monitor overall power health without polling individual rails - simplifying firmware integration in notebook platforms.
MAX17004AETJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Controller, Notebook Power System
- Voltage - Input:
- 4.5V ~
- Number of Outputs:
- 4
- Voltage - Output:
- 3.3V, 5V, 12V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN-EP (5x5)
MAX17004AETJ+ FAQ
1.How can I place an order for MAX17004AETJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17004AETJ+ 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 MAX17004AETJ+ reliable?
The price and inventory of MAX17004AETJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17004AETJ+ is usually 5 days.
3.What payment methods are accepted for MAX17004AETJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17004AETJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17004AETJ+?
MAX17004AETJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17004AETJ+ 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 MAX17004AETJ+?
For technical support, including MAX17004AETJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17004AETJ+ requirements.
6.How does Aetrix verify that MAX17004AETJ+ is sourced from the original manufacturer or authorized distributors?
All MAX17004AETJ+ 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 MAX17004AETJ+ meets industry standards.
7.What is the process for return or replacement of MAX17004AETJ+?
All MAX17004AETJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17004AETJ+, 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 MAX17004AETJ+ part is unused and in its original packaging.
Return procedure for MAX17004AETJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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