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Analog Devices Inc./Maxim Integrated MAX25601ATJE/VY+
- Part No.:
- MAX25601ATJE/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX25601ATJE/VY+.pdf
- Description:
- IC LED DRIVER CTRLR PWM 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,925
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Product details
Overview
The MAX25601ATJE/VY+ from Maxim Integrated is a dual-stage synchronous boost + synchronous buck LED controller for automotive front-lighting systems. It integrates a 4.5V–40V input boost stage (programmable 200kHz–2.2MHz, spread-spectrum enabled) followed by a 4.5V–65V buck LED driver with F3 average-current-mode control, 1MHz max switching, analog/PWM dimming, and integrated 1A gate drivers. It supports high-beam/low-beam and HUD applications via SHUNT_CTRL/SHUNT_DRV pins.
For engineers reviewing the MAX25601ATJE/VY+ datasheet, MAX25601ATJE/VY+ pinout, MAX25601ATJE/VY+ application, or MAX25601ATJE/VY+ equivalent, key selection considerations include its dual-controller architecture, 32-pin SWTQFN package with dedicated shunt dimming control, -40°C to +125°C operation, and fault reporting on FLT pin for LED open/short, boost UVLO, and buck overvoltage conditions.
Technical Context
The MAX25601ATJE/VY+ implements a two-stage topology: a peak-current-mode boost controller with programmable slope compensation (selected at startup via DL2 pin resistor), 180° SYNCOUT for interleaved operation, and hiccup-mode protection; followed by a buck LED controller using Maxim's F3 Architecture - an average-current-mode scheme eliminating loop compensation components while maintaining constant frequency up to 1MHz.
It features independent high- and low-side gate drivers (DH1/DL1 for boost, DH2/DL2 for buck) with ≥1A peak source/sink, adaptive non-overlap logic, and integrated 5V VDRV regulator (±5% accuracy, 10mA output). The 32-pin SWTQFN package includes SHUNT_CTRL and SHUNT_DRV pins enabling fast external n-FET shunt dimming for HUDs, a capability absent in 28-pin TSSOP variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 40V - supports automotive battery rail including cold-crank (4.5V) and load-dump transients. |
| Boost Output Range | Up to 65V - enables driving long LED strings or powering high-voltage buck stages in matrix/pixel lighting. |
| Buck Switching Frequency | Up to 1MHz - allows smaller magnetics and faster transient response in space-constrained headlamp modules. |
| Gate Drive Capability | DH1/DL1 and DH2/DL2 each deliver ≥1A peak source/sink - drives moderate-size external MOSFETs without external buffers. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive placement per AEC-Q100 Grade 0 requirements. |
| Dimming Support | Analog (REFI), PWM (DIM), and analog-to-PWM (internal 200Hz ramp) - enables >10,000:1 dimming ratio with shunt FET assist. |
| Fault Reporting | Single open-drain FLT pin indicates buck LED open/short/overvoltage and boost undervoltage - simplifies system-level fault monitoring. |
Pinout & Package
The MAX25601ATJE/VY+ is housed in a 32-pin SWTQFN (5mm × 5mm, exposed pad), designated package code T3255Y+6C. Thermal resistance is θJA = 36°C/W (4-layer board), enabling high-power LED driver operation with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply for internal VDRV LDO | Accepts 4.5V–40V; must be bypassed with 0.1µF ceramic to PGND - primary power entry point. |
| VDRV | +5V regulated output | Supplies gate drivers and external circuitry (±5%, 10mA); bypass with 4.7µF ceramic to PGND. |
| SHUNT_CTRL / SHUNT_DRV | HU D dimming control interface | SHUNT_CTRL accepts PWM input; SHUNT_DRV drives external n-FET gate - enables microsecond-scale shunt dimming for heads-up displays. |
| DL2 | Buck low-side gate driver output | Drives buck low-side MOSFET; also configures boost slope compensation at startup (30kΩ/100kΩ to PGND). |
| SYNCOUT | 180° phase-shifted clock output | Drives RT/SYNCIN of second MAX25601 to enable interleaved two-phase boost operation - reduces input/output ripple. |
| FLT | Open-drain fault indicator | Asserts low on buck LED open/short/OVP or boost UVLO - shared fault signaling simplifies host MCU polling. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous boost + buck architecture | Enables wide-input automotive LED drivers with precise current regulation and high efficiency (>92% typical) across full load range. |
| F3 average-current-mode buck control | Eliminates external compensation components (no RC network on COMP), reducing BOM count and layout sensitivity. |
| Integrated 1A gate drivers with adaptive deadtime | Prevents shoot-through in both boost and buck stages without external timing circuits or gate resistors for basic operation. |
| SHUNT_CTRL/SHUNT_DRV dimming interface | Supports fast external shunt FET switching for HUD applications - achieves >10,000:1 dimming ratio with minimal latency. |
| Spread-spectrum boost switching | Reduces EMI peak emissions by ±6% frequency dithering - eases compliance with CISPR 25 Class 5 radiated emissions limits. |
Applications
| Automotive High/Low-Beam Lighting | Adaptive Matrix Headlamps |
|---|---|
Use Scenario: Dynamic beam shaping in OEM headlamp modules where high-beam segments are selectively blanked to avoid glare. IC Role / Device Role / Timing Role: MAX25601ATJE/VY+ acts as primary LED current controller - boost stage supplies 48V bus, buck stage regulates individual pixel currents with PWM dimming. Use Value: Enables real-time pixel-level current control with <100ns dimming edge fidelity via SHUNT_DRV, supporting SAE J3068-compliant adaptive driving beams. |
Use Scenario: Multi-zone LED arrays requiring independent current regulation per zone (e.g., 16–64 zones) with synchronized dimming. IC Role / Device Role / Timing Role: MAX25601ATJE/VY+ serves as zone-specific LED driver - boost stage provides stable high-voltage rail, buck stage delivers precise constant current per string. Use Value: F3 control ensures stable current regulation without loop tuning per zone; SYNCOUT enables synchronized multi-device operation for flicker-free illumination. |
| Heads-Up Display (HUD) Backlight | Daytime Running Lights (DRL) |
Use Scenario: High-contrast, high-brightness HUD backlight requiring rapid on/off transitions and deep dimming. IC Role / Device Role / Timing Role: MAX25601ATJE/VY+ controls main LED string while SHUNT_CTRL/SHUNT_DRV drives parallel shunt FET for sub-millisecond dimming. Use Value: Achieves >10,000:1 dimming ratio and <5µs shunt turn-on via dedicated SHUNT_DRV output - critical for ambient-adaptive HUD luminance control. |
Use Scenario: Safety-critical DRL modules operating continuously at elevated ambient temperatures (e.g., engine bay mounting). IC Role / Device Role / Timing Role: MAX25601ATJE/VY+ functions as robust LED current regulator - handles 12V–16V input variations and thermal stress up to +125°C junction. Use Value: Integrated thermal shutdown (165°C), -40°C to +125°C rating, and fault reporting on FLT ensure fail-safe operation meeting ISO 16750-4 environmental requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-stage LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX25601CTJE/VY+ | Same 32-pin SWTQFN package and feature set, but rated for 4.5V–48V input (vs. 4.5V–40V) and 52V absolute max on IN/UVEN/INP/INN pins. | Preferred for 24V commercial vehicle platforms or systems with higher input transients. | Select MAX25601CTJE/VY+ when input voltage may exceed 40V; otherwise MAX25601ATJE/VY+ offers optimal cost/performance for 12V automotive. |
| LM34927QMH/NOPB | Single-stage buck-boost LED controller (no separate boost + buck stages); 4.5V–65V input; no integrated shunt dimming or HUD support. | Suitable for simpler DRL or fog lamp designs without adaptive pixel control or HUD requirements. | Choose LM34927QMH/NOPB only for cost-sensitive, single-stage applications lacking matrix/HUD functionality - not a functional replacement. |
Compared with MAX25601CTJE/VY+, the MAX25601ATJE/VY+ offers tighter input voltage matching for standard 12V automotive systems and identical shunt dimming capability; versus LM34927QMH/NOPB, it provides true two-stage architecture, F3 control, and dedicated HUD interface - essential for adaptive front-lighting systems.
Availability
The MAX25601ATJE/VY+ is available at Aetrix Electronics and suitable for automotive exterior lighting, adaptive headlamp modules, and HUD backlighting requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX25601ATJE/VY+ 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 precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets, with emphasis on high-reliability, AEC-Q100-qualified solutions.
The MAX25601 series belongs to Maxim's automotive LED driver product line, engineered specifically for adaptive front-lighting systems (AFS) requiring dual-stage voltage conversion, high-current precision regulation, and fast shunt dimming for HUD and matrix applications.
FAQ
What is the function of the SHUNT_CTRL and SHUNT_DRV pins on the MAX25601ATJE/VY+?
The SHUNT_CTRL pin accepts a PWM signal to directly control the SHUNT_DRV output, which drives the gate of an external n-channel MOSFET used for shunt dimming. This enables ultra-fast LED current bypass - critical for high-contrast HUD backlighting. The MAX25601ATJE/VY+ uses this interface to achieve >10,000:1 dimming ratios with sub-microsecond switching, a capability exclusive to the 32-pin TQFN variants (A/C) like the MAX25601ATJE/VY+.
Does the MAX25601ATJE/VY+ support synchronization with a second device?
Yes, the MAX25601ATJE/VY+ features a SYNCOUT pin that provides a 180° phase-shifted clock signal, designed to drive the RT/SYNCIN pin of a second MAX25601 device. This enables interleaved two-phase boost operation, reducing input and output ripple current by up to 50%. The MAX25601ATJE/VY+ can operate as master or slave depending on the resistor value (5kΩ or 35kΩ to PGND) on SYNCOUT during startup.
What protection features does the MAX25601ATJE/VY+ provide?
The MAX25601ATJE/VY+ integrates comprehensive protection: thermal shutdown (165°C, 15°C hysteresis), boost undervoltage lockout (UVLO), buck LED open/short detection, buck output overvoltage (2.5V threshold), and hiccup-mode current limiting. All faults assert the open-drain FLT pin, and detection is synchronized to DIM high state - ensuring reliable fault reporting during active dimming cycles in the MAX25601ATJE/VY+.
How is the buck switching frequency set on the MAX25601ATJE/VY+?
The buck switching frequency on the MAX25601ATJE/VY+ is set using the TON pin, configured with an external resistor to AGND and capacitor to AGND, along with the feedback resistor divider on the OUT pin. The formula is FSW_BUCK = (ROUT2 + ROUT1) / (CTON × RTON × ROUT2). Unlike the boost stage, the buck frequency is not set via RT/SYNCIN - this distinction is fixed in the MAX25601ATJE/VY+ architecture and confirmed in the Electrical Characteristics table.
Is the MAX25601ATJE/VY+ AEC-Q100 qualified?
Yes, the MAX25601ATJE/VY+ is qualified to AEC-Q100 Grade 0 (−40°C to +150°C junction temperature), with guaranteed operation from −40°C to +125°C ambient. Its design includes automotive-grade thermal shutdown (165°C), robust ESD protection (HBM >2kV), and validated performance across voltage transients defined in ISO 7637-2 and ISO 16750-2 - all documented in Maxim's official qualification report for the MAX25601A family.
MAX25601ATJE/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- DC DC Controller
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 2
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- 4.9V ~ 5.1V
- Current - Output / Channel:
- -
- Frequency:
- 200kHz ~ 2.2MHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 32-TQFN-EP (5x5)
MAX25601ATJE/VY+ FAQ
1.How can I place an order for MAX25601ATJE/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25601ATJE/VY+ 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 MAX25601ATJE/VY+ reliable?
The price and inventory of MAX25601ATJE/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX25601ATJE/VY+ is usually 5 days.
3.What payment methods are accepted for MAX25601ATJE/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25601ATJE/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25601ATJE/VY+?
MAX25601ATJE/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25601ATJE/VY+ 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 MAX25601ATJE/VY+?
For technical support, including MAX25601ATJE/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25601ATJE/VY+ requirements.
6.How does Aetrix verify that MAX25601ATJE/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX25601ATJE/VY+ 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 MAX25601ATJE/VY+ meets industry standards.
7.What is the process for return or replacement of MAX25601ATJE/VY+?
All MAX25601ATJE/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25601ATJE/VY+, 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 MAX25601ATJE/VY+ part is unused and in its original packaging.
Return procedure for MAX25601ATJE/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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