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Analog Devices Inc./Maxim Integrated MAX20052ATC/V+CMS
- Part No.:
- MAX20052ATC/V+CMS
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX20052ATC/V+CMS.pdf
- Description:
- IC LED DRVR RGLTR PWM 2A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,352
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Product details
Overview
MAX20052ATC/V+CMS from Analog Devices is a 2.1MHz synchronous-buck HB LED driver with integrated 0.14Ω (typ) MOSFETs, designed for automotive exterior lighting. It delivers up to 2A LED current with ±2.5% full-scale regulation accuracy, high-side current sensing, and 4.5V–65V input range-enabling robust operation during cold-crank and load-dump events in headlamps and DRLs.
For engineers reviewing the MAX20052ATC/V+CMS datasheet, MAX20052ATC/V+CMS pinout, MAX20052ATC/V+CMS application, or MAX20052ATC/V+CMS equivalent, key selection factors include its 2.1MHz switching frequency (reducing EMI and enabling compact magnetics), internal loop compensation (minimizing external components), and AEC-Q100 qualification for automotive-grade reliability.
Technical Context
The MAX20052ATC/V+CMS implements high-side average current-mode control using an internal 2.1MHz oscillator with spread-spectrum modulation to suppress EMI peaks. Its transconductance error amplifier compares REFI voltage (0–1.2V) against a 5× amplified current-sense signal (CS+, CS−), generating PWM duty cycle via a sawtooth comparator.
It integrates fully synchronous power switches (RDS(ON) ≤ 340mΩ HS / ≤ 300mΩ LS at +125°C), supports analog dimming down to zero current, and features active-low open-drain FLT output for LED open/short and thermal fault reporting-with 105µs deglitching and 210ms shutdown timer on sustained PWM low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 65V - supports full automotive battery transient profile including cold-crank (down to 4.5V) and load-dump (up to 65V). |
| Switching Frequency | 2.1MHz (typ) - enables small inductors/capacitors and avoids AM-band interference; includes spread-spectrum modulation. |
| LED Output Current | Up to 2A continuous - regulated via high-side current sense with ±2.5% accuracy at full scale over −40°C to +125°C. |
| Current Sense Voltage | 200mV full-scale - low-loss sensing with 5× gain; allows precise current programming using standard resistor values. |
| Regulator Output | 5V, 10mA LDO (VCC) - powers external bias circuitry; maintains regulation across 5.5V–65V input with ±2.5% tolerance. |
| Fault Protection | Open-LED, short-circuit, overtemperature, and undervoltage lockout - FLT pin asserts after 105µs deglitch; thermal shutdown at 165°C. |
| Quiescent Current | 5µA (typ) in shutdown - achieved when PWM held low >210ms; enables ultra-low standby power in always-on lighting systems. |
Pinout & Package
MAX20052ATC/V+CMS is housed in a thermally enhanced 12-pin (3mm × 3mm) TDFN package with exposed pad (EP), optimized for automotive PCB layouts requiring high power density and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | PGND | Power ground return for high-current LX path; must connect to large copper pour under EP for thermal dissipation. |
| 3 | CS+ | High-side current-sense positive input; connects to inductor side of sense resistor (200mV full-scale). |
| 4 | CS− | High-side current-sense negative input; connects to LED string anode; enables single-point LED grounding. |
| 5 | PWM | Logic-level dimming enable; low = disable both MOSFETs; >210ms low triggers 5µA shutdown mode. |
| 6 | FLT | Active-low open-drain fault indicator; asserts for LED open/short, thermal, or UVLO conditions. |
| 7 | AGND | Analog ground reference for REFI, COMP, and internal control circuitry; separate from PGND to minimize noise coupling. |
| 8 | REFI | Analog dimming control input; 0–1.2V sets LED current linearly (0V = 0A, 1.2V = full scale); clamped at 1.3V max. |
| 9 | VCC | 5V, 10mA regulated output; requires 1µF ceramic bypass to AGND; powers external logic or sensors. |
| 10 | BST | Bootstrap supply for high-side gate drive; requires 0.1µF ceramic capacitor to LX for proper top-FET turn-on. |
| 11, 12 | LX | Switching node connecting internal HS/LS FETs; ties to inductor and BST capacitor; carries full 2A peak current. |
| EP | Exposed Pad | Thermal and electrical ground; must be soldered to solid ground plane and connected to AGND/PGND externally. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualification | Rated for −40°C to +125°C ambient operation with full parametric guarantee - meets automotive reliability standards. |
| Integrated 0.14Ω (typ) MOSFETs | Reduces external component count and layout complexity while maintaining >90% efficiency at 12V input and 2A output. |
| Internal loop compensation | Eliminates need for external compensation network (COMP pin not used), simplifying design and improving stability margin. |
| High-side current regulation | Requires only one connection to LED string; enables local LED cathode grounding - simplifies mechanical mounting and EMC layout. |
| Synchronized PWM dimming | Rising edge of PWM restarts oscillator, ensuring deterministic timing and consistent dimming at low duty cycles (<1%). |
| Ultra-low shutdown current | 5µA typical at 12V IN - extends battery life in always-on vehicle systems such as daytime running lamps (DRLs). |
Applications
| Daytime Running Lamps (DRLs) | Head Lamps |
|---|---|
|
Use Scenario: Continuous low-power illumination during daylight hours for vehicle visibility compliance. IC Role / Device Role / Timing Role: Constant-current LED driver regulating 1–2A through 4–6 series LEDs at 2.1MHz switching frequency. Use Value: Internal compensation and 5µA shutdown current enable minimal BOM count and extended battery runtime without compromising brightness stability. |
Use Scenario: Main forward lighting with adaptive beam shaping and dynamic intensity control. IC Role / Device Role / Timing Role: High-reliability buck controller delivering 2A LED current with ±2.5% regulation accuracy across temperature. Use Value: 4.5V–65V input range and AEC-Q100 qualification ensure uninterrupted operation during engine start and alternator load dump. |
| Fog Lamps | Rear Lamps |
|
Use Scenario: Short-range, high-intensity illumination in low-visibility weather conditions. IC Role / Device Role / Timing Role: Robust current regulator supporting analog dimming (via REFI) and PWM dimming for intensity modulation. Use Value: High-side sensing eliminates need for isolated ground return, simplifying integration into metal-housing fog lamp assemblies. |
Use Scenario: Brake, tail, and turn signal functions requiring fast response and fault diagnostics. IC Role / Device Role / Timing Role: Fault-aware LED driver with open/short detection and active-low FLT output for system-level safety monitoring. Use Value: 105µs FLT deglitching and thermal shutdown at 165°C prevent false alarms and protect against thermal runaway in enclosed housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar HB LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20052ATC+T | Same die, tape-and-reel packaging (no /V+CMS suffix); identical electrical specs and pinout. | No functional difference; selected for automated SMT assembly vs. cut-tape evaluation. | Choose MAX20052ATC+T for volume production; MAX20052ATC/V+CMS for prototyping or small-batch builds. |
| MAX20053ATC/V+ | 2.1MHz switching frequency, external loop compensation (COMP pin accessible), no internal compensation. | Requires external RC network for stability tuning; preferred where dynamic response or EMI optimization is critical. | Choose MAX20053ATC/V+ when loop bandwidth or phase margin must be adjusted; MAX20052ATC/V+CMS when simplicity and minimal BOM are priorities. |
Compared with MAX20052ATC/V+CMS, MAX20052ATC+T offers identical performance in tape-and-reel format for production lines, while MAX20053ATC/V+ trades internal compensation for design flexibility-making it suitable for systems requiring custom loop shaping but increasing component count and layout sensitivity.
Availability
MAX20052ATC/V+CMS is available at Aetrix Electronics and suitable for automotive exterior lighting, commercial LED signage, and industrial status illumination requiring stable component supply, AEC-Q100 compliance, and high-temperature operation.
Supply support for MAX20052ATC/V+CMS 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and consumer markets.
The MAX20050–MAX20053 family was engineered specifically for automotive exterior LED lighting, emphasizing wide-input operation, integrated power stages, and robust fault handling to replace discrete DC-DC + driver solutions.
FAQ
What is the switching frequency of the MAX20052ATC/V+CMS?
The MAX20052ATC/V+CMS operates at a fixed internal switching frequency of 2.1MHz (typ), with ±10% variation over temperature and line. This high-frequency operation minimizes external passive component size and avoids AM-band interference, and includes spread-spectrum modulation to reduce EMI peaks. The MAX20052ATC/V+CMS does not support external frequency synchronization or adjustment.
Does the MAX20052ATC/V+CMS support both analog and PWM dimming?
Yes, the MAX20052ATC/V+CMS supports dual dimming modes: analog dimming via the REFI pin (0–1.2V input sets LED current linearly from 0A to full scale), and PWM dimming via the dedicated PWM pin (logic-level input with synchronized oscillator restart). Both methods can be used independently; simultaneous use is not recommended due to potential interaction between control loops.
What protection features are integrated into the MAX20052ATC/V+CMS?
The MAX20052ATC/V+CMS integrates LED open-circuit detection, LED short-circuit protection, overtemperature shutdown (165°C trigger with 10°C hysteresis), input undervoltage lockout (4.45V rising threshold), and cycle-by-cycle current limiting (300mV CS threshold). Fault conditions assert the open-drain FLT pin after a 105µs deglitch timer, and thermal faults force immediate shutdown.
Is the MAX20052ATC/V+CMS pin-compatible with other devices in the MAX20050–MAX20053 family?
No-MAX20052ATC/V+CMS uses the 12-pin TDFN package shared with MAX20050, but differs electrically from MAX20051/MAX20053 (14-pin TSSOP) and MAX20053D (24-pin TQFN). Within the TDFN group, MAX20050 and MAX20052 share identical pinout and internal compensation, but differ in switching frequency (400kHz vs. 2.1MHz) and spread-spectrum enablement.
What is the purpose of the REFI pin on the MAX20052ATC/V+CMS?
The REFI pin on the MAX20052ATC/V+CMS serves as the analog dimming control input: a voltage from 0V to 1.2V applied here linearly sets the LED current from 0A to full scale (2A). Below 0.18V, LED current is guaranteed zero; above 1.2V, REFI is clamped. It interfaces directly with microcontroller DACs or resistive dividers-no external op-amp required.
MAX20052ATC/V+CMS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 65V
- Voltage - Output:
- 4.875V ~ 5.125V
- Current - Output / Channel:
- 2A
- Frequency:
- 2.1MHz
- Dimming:
- PWM
- Applications:
- Commercial & Industrial Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX20052ATC/V+CMS FAQ
1.How can I place an order for MAX20052ATC/V+CMS through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20052ATC/V+CMS 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 MAX20052ATC/V+CMS reliable?
The price and inventory of MAX20052ATC/V+CMS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20052ATC/V+CMS is usually 5 days.
3.What payment methods are accepted for MAX20052ATC/V+CMS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20052ATC/V+CMS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20052ATC/V+CMS?
MAX20052ATC/V+CMS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20052ATC/V+CMS 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 MAX20052ATC/V+CMS?
For technical support, including MAX20052ATC/V+CMS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20052ATC/V+CMS requirements.
6.How does Aetrix verify that MAX20052ATC/V+CMS is sourced from the original manufacturer or authorized distributors?
All MAX20052ATC/V+CMS 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 MAX20052ATC/V+CMS meets industry standards.
7.What is the process for return or replacement of MAX20052ATC/V+CMS?
All MAX20052ATC/V+CMS units undergo pre-shipment inspection (PSI). If there is an issue with MAX20052ATC/V+CMS, 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 MAX20052ATC/V+CMS part is unused and in its original packaging.
Return procedure for MAX20052ATC/V+CMS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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