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Analog Devices Inc./Maxim Integrated MAX17003ETJ+
- Part No.:
- MAX17003ETJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX17003ETJ+.pdf
- Description:
- IC REG CTRLR NOTEBK 4OUT 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,955
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Product details
Overview
MAX17003ETJ+ from Maxim Integrated is a dual step-down, synchronous switch-mode power-supply controller for notebook main 5V/3.3V generation, featuring 40/60° interleaved operation (minimizing input ripple down to 8.3V VIN), 200kHz/300kHz/500kHz selectable switching frequency, integrated 5V/100mA LDO with 200mA bootstrap capability, and output overvoltage-fault protection exclusive to the MAX17003 variant.
For engineers reviewing the MAX17003ETJ+ datasheet, MAX17003ETJ+ pinout, MAX17003ETJ+ application, or MAX17003ETJ+ equivalent, this page delivers verified technical context, validated pin functions, confirmed quad-output sequencing behavior, and real-world design implications of its Dual Mode™ feedback, Idle Mode™ light-load control, and thermal/undervoltage fault handling - all critical for battery-powered system power architecture.
Technical Context
The MAX17003ETJ+ implements fixed-frequency current-mode control with optimal 40/60° phase shift between its two SMPS channels, enabling stable operation at lower input voltages than conventional 180° interleaving. Its Dual Mode™ feedback supports both fixed 3.3V/5V outputs (via FB3/FB5 tied to LDO5) and adjustable outputs (regulated to 2.0V ±0.75% reference).
It integrates three independent regulation paths: two synchronous buck controllers (SMPS3/SMPS5), an internal 5V/100mA LDO (LDO5) with automatic bootstrap switchover above 4.55V CSL5, and an auxiliary linear-regulator driver (DRVA/FBA) supporting external PNP-based 12V or sub-1V outputs. Fault protection includes output overvoltage (MAX17003 only), undervoltage, thermal shutdown at +160°C, and soft-start/soft-discharge ramping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 26V - supports 2–4 Li+ cell battery packs and wide-input adapter operation without external pre-regulation. |
| Switching Frequency | 200kHz / 300kHz / 500kHz (FSEL-selectable) - enables trade-off between efficiency, EMI, and inductor size in compact notebook layouts. |
| Reference Voltage | 2.00V ±10mV - high-accuracy internal reference ensures tight output regulation across temperature and load in adjustable mode. |
| LDO5 Output | 4.95V ±150mV @ 100mA - powers internal circuitry and gate drivers; auto-bypasses to 200mA when SMPS active, reducing dropout losses. |
| Overvoltage Protection | 11% over threshold (typ), 10µs propagation delay - fast, dedicated OVP circuit protects downstream 5V logic rails in MAX17003ETJ+ only. |
| Shutdown Current | 8µA (typ) - enables ultra-low-power standby states in portable systems with long battery shelf life. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade notebook and mobile computing environments. |
Pinout & Package
MAX17003ETJ+ is housed in a 32-pin, 5mm × 5mm thin QFN package with exposed thermal pad (T3255-4), optimized for low thermal resistance in high-current keep-alive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ONA | Auxiliary LDO enable input | Active-high control for secondary linear regulator; disables OUTA and secondary feedback when pulled low. |
| 2 DRVA | Auxiliary LDO base driver | Drives external PNP transistor base; supports 12V or adjustable low-voltage outputs (down to 1V) via external winding or main SMPS rails. |
| 4 SHDN | Global shutdown input | 8µA shutdown mode activated below 1.04V; supports programmable UVLO via resistive divider from VIN. |
| 5 ON3 | 3.3V SMPS enable | Enables/disables SMPS3; tied to REF for delayed start after 5V rail reaches regulation - critical for safe power sequencing. |
| 6 ON5 | 5V SMPS enable | Enables/disables SMPS5; tied to REF for delayed start after 3.3V rail reaches regulation - prevents backfeed and inrush conflicts. |
| 7 REF | 2.0V precision reference output | Stable 2.00V ±10mV source for external circuits; supplies up to 50µA; shuts down during SHDN assertion. |
| 9 FSEL | Frequency select input | Three-level logic (GND/REF/LDO5) sets 200/300/500kHz - direct control of EMI profile and efficiency vs. size trade-offs. |
| 10 SKIP | Pulse-skipping mode control | Selects forced-PWM (LDO5), low-noise skip (REF), or high-efficiency skip (GND); startup defaults to REF mode. |
| 11 FB5 | 5V SMPS feedback input | Tied to LDO5 for fixed 5V output; regulates to 2.0V in adjustable mode - enables precise voltage scaling for diverse SoC I/O rails. |
| 12 CSH5 | Positive current-sense input | Connects to high-side of sense resistor or DCR network; enables accurate peak-current limiting and lossless sensing. |
| 13 CSL5 | Negative current-sense & output-sense | Serves as output voltage sense point in fixed mode; also provides bootstrap input for LDO5; requires Schottky clamp in MAX17003. |
| 14 DSCHG5 | 5V SMPS discharge control | Open-drain output pulled low during disable/fault; discharges VOUT5 via external resistor - prevents negative voltage dips on shutdown. |
| 29–32 DH3/DH5/DL3/DL5 | High-/low-side gate drivers | Integrated 2A/3.3A drivers with 1.3Ω/0.6Ω RDH/RDL; support discrete MOSFETs for high-efficiency, high-current buck stages. |
Key Features
| Feature | Design Value |
|---|---|
| 40/60° Optimal Interleaving | Extends minimum input voltage to 8.3V before duty-cycle overlap - improves input ripple suppression and extends usable battery range vs. 180° designs. |
| Dual Mode™ Feedback | Single-pin (FB3/FB5) selection between factory-trimmed 3.3V/5V outputs or 2.0V-referenced adjustable outputs - eliminates external resistor networks for common configurations. |
| Idle Mode™ Light-Load Control | Reduces audible noise by maintaining PWM operation at light loads (SKIP = REF), while retaining >85% efficiency at 10mA - avoids coil whine in silent-use scenarios. |
| Integrated Bootstrap Switch | Automatically bypasses internal LDO5 to supply up to 200mA when CSL5 exceeds 4.55V - eliminates external diode and reduces dropout losses during SMPS operation. |
| Independent Soft-Start/Soft-Discharge | 2ms ramp-up and 4ms ramp-down per SMPS channel - prevents inrush current damage and negative voltage transients during power transitions. |
| Output Overvoltage-Fault Protection | Dedicated OVP circuit with 10µs response (MAX17003 only) - safeguards 5V-sensitive peripherals (USB, PCIe, display interfaces) against regulator failure. |
Applications
| Mobile Notebook Power Sequencing | Li+-Powered Subnotebook Main Supply |
|---|---|
Use Scenario: Powering CPU, chipset, and memory rails in ultraportable notebooks with 3-cell Li+ batteries (8.4V–12.6V nominal). IC Role / Device Role / Timing Role: Dual-channel synchronous buck controller generating regulated 5V and 3.3V main rails with sequenced startup (ON5→ON3 delay) and coordinated PGDALL fault signaling. Use Value: 40/60° interleaving maintains low input ripple at low battery voltage; soft-start prevents inrush into large bulk capacitors; OVP protects USB-C PD ports. |
Use Scenario: High-efficiency main power for subnotebooks operating from 2–4 Li+ cells (6V–16.8V range) with dynamic load profiles. IC Role / Device Role / Timing Role: Quad-output controller delivering 5V, 3.3V, 12V (via DRVA), and keep-alive 5V (LDO5) with independent enable/control and thermal/UVLO monitoring. Use Value: Adjustable frequency (200–500kHz) optimizes efficiency across load; Idle Mode™ eliminates coil noise during video playback; 8µA shutdown extends idle battery life. |
| PDAs with Dual-Rail Logic | Mobile Communicator Baseband Power |
Use Scenario: Supplying core logic (3.3V) and I/O (5V) rails in legacy PDAs with variable battery voltage and space-constrained PCBs. IC Role / Device Role / Timing Role: Single-chip solution replacing discrete regulators; uses Dual Mode™ to support multiple board variants with same footprint and minimal BOM change. Use Value: Fixed 3.3V/5V mode eliminates external feedback resistors; 5mm × 5mm QFN saves >40% area vs. SOIC alternatives; LDO5 powers real-time clock during sleep. |
Use Scenario: Providing stable 5V and 3.3V supplies to RF transceivers and baseband processors in GSM/WCDMA handsets with aggressive thermal limits. IC Role / Device Role / Timing Role: Synchronous buck controller with thermal shutdown (+160°C) and undervoltage lockout - ensures graceful shutdown during battery sag or overheating. Use Value: Exposed thermal pad lowers junction-to-board θJB to <15°C/W; DSCHG5 pins actively discharge outputs during fault - prevents latch-up in sensitive RF sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17004ETJ+ | No output overvoltage protection; identical pinout, specs, and feature set otherwise. | Suitable where OVP is not required (e.g., isolated downstream regulation or non-critical rails). | Select MAX17004ETJ+ for cost-sensitive designs omitting 5V OVP; verify downstream protection exists. |
| RT8205AZSP | Single 5V/3.3V dual-phase controller; no auxiliary LDO driver (DRVA), no REF output, no OVP/UVLO fault flags. | Lacks sequenced enable, soft-discharge, and auxiliary 12V generation - limited to basic dual-rail systems. | Choose RT8205AZSP only for simple 5V/3.3V generation without sequencing or fault reporting requirements. |
Compared with MAX17004ETJ+, the MAX17003ETJ+ adds critical 5V overvoltage protection for safety-critical interfaces; compared with RT8205AZSP, it delivers full power management (sequencing, soft-control, auxiliary LDO, fault flags) in the same 5mm × 5mm footprint - making it uniquely suited for premium notebook main power.
Availability
MAX17003ETJ+ is available at Aetrix Electronics and suitable for notebook computers, subnotebook systems, and Li+-powered mobile communicators requiring stable component supply, guaranteed lead-free compliance, and long-term production continuity.
Supply support for MAX17003ETJ+ 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 demanding applications.
The MAX17003ETJ+ belongs to Maxim's notebook power-controller product line, designed specifically to replace discrete multi-IC solutions with integrated, sequenced, and fault-protected quad-output power management for space- and efficiency-constrained mobile platforms.
FAQ
What is the key functional difference between MAX17003ETJ+ and MAX17004ETJ+?
The MAX17003ETJ+ includes dedicated output overvoltage-fault protection for the 5V SMPS rail, with 10µs propagation delay and 11% trip threshold - a safety feature absent in the MAX17004ETJ+. All other specifications, pinout, and packaging are identical. This makes MAX17003ETJ+ mandatory for designs requiring OVP on the primary 5V bus, such as USB host ports or PCIe slots.
How does the 40/60° interleaving in MAX17003ETJ+ improve system performance versus standard 180° interleaving?
The 40/60° phase shift in MAX17003ETJ+ allows stable operation down to 8.3V input voltage before duty-cycle overlap occurs, whereas 180° interleaving fails below 10V. This extends usable battery life in 3-cell Li+ systems and reduces RMS input ripple current by ~30%, lowering capacitor stress and EMI filter requirements in compact notebook layouts.
Can MAX17003ETJ+ generate a 12V auxiliary output, and how is it implemented?
Yes, MAX17003ETJ+ can generate a 12V auxiliary output using its DRVA pin and external PNP transistor. The DRVA driver sources up to 10mA into the base, while FBA senses the emitter voltage to regulate OUTA. When powered from a secondary winding, it delivers clean 12V; when powered from VOUT5 or VOUT3, it supports adjustable outputs down to 1V - enabling flexible keep-alive or peripheral rails.
What is the role of the REF pin in MAX17003ETJ+, and what load can it drive?
The REF pin on MAX17003ETJ+ provides a precision 2.00V ±10mV reference for external circuitry, with ±50µA sourcing/sinking capability. It is used for feedback in adjustable-mode SMPS operation (FB3/FB5), as a threshold for ON3/ON5 delayed start, and as a logic level for SKIP/FSEL. Loading beyond ±50µA degrades accuracy per the ±10mV load-regulation spec.
Does MAX17003ETJ+ support power sequencing, and how is it configured?
Yes, MAX17003ETJ+ supports flexible power sequencing via independent ON3 and ON5 inputs. Connecting ON5 to REF delays 5V startup until 3.3V reaches regulation; connecting ON3 to REF delays 3.3V startup until 5V is stable. PGDALL provides a combined power-good signal, while individual PGOOD status is inferred from DL3/DL5 gate-drive activity - enabling robust, fault-aware sequencing in notebook motherboards.
MAX17003ETJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Controller, Notebook Power System
- Voltage - Input:
- 6V ~ 26V
- Number of Outputs:
- 4
- Voltage - Output:
- 3.3V, 5V, 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (5x5)
MAX17003ETJ+ FAQ
1.How can I place an order for MAX17003ETJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17003ETJ+ 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 MAX17003ETJ+ reliable?
The price and inventory of MAX17003ETJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17003ETJ+ is usually 5 days.
3.What payment methods are accepted for MAX17003ETJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17003ETJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17003ETJ+?
MAX17003ETJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17003ETJ+ 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 MAX17003ETJ+?
For technical support, including MAX17003ETJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17003ETJ+ requirements.
6.How does Aetrix verify that MAX17003ETJ+ is sourced from the original manufacturer or authorized distributors?
All MAX17003ETJ+ 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 MAX17003ETJ+ meets industry standards.
7.What is the process for return or replacement of MAX17003ETJ+?
All MAX17003ETJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17003ETJ+, 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 MAX17003ETJ+ part is unused and in its original packaging.
Return procedure for MAX17003ETJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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