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Analog Devices Inc./Maxim Integrated MAX20029ATIA/V+T
- Part No.:
- MAX20029ATIA/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20029ATIA/V+T.pdf
- Description:
- IC REG BUCK ADJ 1.5A QUAD 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,926
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Product details
Overview
MAX20029ATIA/V+T from Analog Devices is a quad-output automotive-grade PMIC integrating four synchronous step-down DC-DC converters with factory-programmable 1.5A per channel, 2.2MHz fixed-frequency PWM operation, and 3.0V–5.5V input range. It delivers tightly regulated 1.0V–4.0V outputs and features spread-spectrum EMI reduction, individual enable/PG signals, and -40°C to +125°C operation for ADAS domain controllers and infotainment power rails.
For engineers reviewing the MAX20029ATIA/V+T datasheet, MAX20029ATIA/V+T pinout, MAX20029ATIA/V+T application, or MAX20029ATIA/V+T equivalent, key selection criteria include per-channel current capability (1.5A ×4), TQFN-28 EP package thermal performance (θJC = 3°C/W), SYNC input compatibility (1.7–2.5MHz), and factory-set output voltage configuration without external resistors.
Technical Context
The MAX20029ATIA/V+T implements peak current-mode control with internal slope compensation and loop compensation, enabling stable regulation across load, line, and temperature. Its hybrid load-line architecture reduces required output capacitance while maintaining fast transient response (±1.5% deviation under 1A step load).
All four buck regulators operate in forced-PWM mode outside the AM band, with OUT3 and OUT4 phase-shifted 180° to minimize input ripple. The device supports external clock synchronization via SYNC pin and includes factory-configured spread-spectrum modulation (±3% frequency deviation at 1.5kHz) to suppress radiated emissions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct connection to automotive battery rail with UVLO at 2.77V and OV protection at 5.8V. |
| Output Current per Channel | 1.5A ×4 - enables independent powering of multiple SoC domains (e.g., CPU core, GPU, I/O, memory) without external current sharing. |
| Switching Frequency | 2.2MHz ±10% - allows full-ceramic design with compact 1.5µH inductors and reduces audible noise in vehicle cabins. |
| Output Voltage Range | 1.0V to 4.0V (factory-programmed) - eliminates need for precision feedback resistors; achieves ±3% accuracy over -40°C to +125°C. |
| Thermal Resistance | θJC = 3°C/W - exposed pad enables efficient heat transfer to PCB ground plane, supporting >2W continuous dissipation in automotive under-hood environments. |
| EMI Mitigation | 180° phase shift on OUT3/OUT4 + spread-spectrum option - reduces peak input current ripple by ~30% and lowers radiated emissions in 30–1000MHz band. |
| Protection Features | Cycle-by-cycle current limiting, overtemperature shutdown at +185°C, input OV/UVLO, and open-drain PG outputs with 256-cycle timeout - ensures robust fault recovery in safety-critical systems. |
Pinout & Package
MAX20029ATIA/V+T is housed in a 28-pin 5mm × 5mm × 0.8mm TQFN-EP package with exposed thermal pad (EP = GND). The package meets AEC-Q100 Grade 0 qualification and supports reflow soldering up to +260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN4 | Active-high enable inputs | Independent digital control of each buck converter; pull-down resistance 100kΩ enables safe default-off behavior during power-up. |
| PG1–PG4 | Open-drain power-good outputs | Assert low if output deviates >6% below or >10% above nominal; require external pull-up ≤VA for logic-level interfacing with microcontrollers. |
| LX1–LX4 | Switching node terminals | High-impedance when disabled; connect LX1–LX2 together only on MAX20029B/D variants - not applicable to MAX20029ATIA/V+T. |
| OUTS1–OUTS4 | Voltage sense inputs | Direct connection to output capacitors enables accurate regulation; factory-trimmed reference (1.0V) eliminates external resistor network for fixed outputs. |
| SYNC | External clock input | Accepts 1.7–2.5MHz square wave; connects to PGND_ to disable synchronization and use internal 2.2MHz oscillator. |
| VA | Analog supply | Must be tied to same rail as PV_ inputs; powers internal reference and control logic - decoupling with ≥1µF ceramic capacitor is mandatory. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 1.5A Buck Converters | Four fully independent, high-efficiency synchronous regulators eliminate need for discrete DC-DC solutions and reduce BOM count by ≥12 components. |
| Factory-Programmed Outputs | Fixed 1.0V–4.0V outputs configured at wafer level - removes tolerance stack-up from external resistors and improves long-term stability over temperature. |
| Forced-PWM Operation | Maintains constant 2.2MHz switching regardless of load - prevents subharmonic oscillation and ensures predictable EMI profile across entire operating range. |
| 180° Phase Interleaving | OUT3 and OUT4 operate out-of-phase to cancel input ripple current - reduces required bulk input capacitance by up to 50% versus single-phase designs. |
| Integrated Thermal Protection | Auto-shutdown at +185°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking conditions. |
Applications
| ADAS Domain Controller Power | Automotive Infotainment SoC |
|---|---|
Use Scenario: Powers vision processor, radar preprocessor, and CAN-FD interface in centralized ADAS ECU requiring tight voltage tracking and low noise. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 1.2V/1.5A (core), 1.8V/1.5A (I/O), 3.3V/1.5A (peripherals), and 1.0V/1.5A (memory interface) simultaneously. Use Value: Phase interleaving and spread spectrum reduce conducted EMI below CISPR 25 Class 5 limits without adding ferrite beads or shielding cans. | Use Scenario: Supplies multi-core application processor, GPU, DDR memory, and display interface in head-unit system operating across wide ambient temperature range. IC Role / Device Role / Timing Role: Single-chip quad-buck solution replacing four discrete converters - simplifies layout, reduces board area by 40%, and ensures synchronized soft-start sequencing. Use Value: Individual EN/PG pins enable precise power-up/down sequencing per subsystem, meeting ISO 26262 ASIL-B functional safety timing requirements. |
| Automotive Telematics Module | Body Control Module (BCM) |
Use Scenario: Powers LTE modem, GNSS receiver, and secure MCU in connected car telematics unit exposed to battery transients and thermal cycling. IC Role / Device Role / Timing Role: Regulates 1.8V (modem RF), 3.3V (GNSS LNA), 1.2V (secure enclave), and 1.0V (baseband DSP) from 12V battery via intermediate 5V rail. Use Value: Input OV/UVLO and overtemperature shutdown ensure uninterrupted operation during jump-start events and under-hood thermal stress. | Use Scenario: Delivers clean, sequenced power to door module microcontroller, LIN transceivers, LED drivers, and sensor interfaces in distributed BCM architecture. IC Role / Device Role / Timing Role: Replaces legacy linear regulators and discrete buck ICs - provides higher efficiency (>92% at 1A), lower thermal footprint, and integrated fault reporting via PG outputs. Use Value: Soft-start ramp time (~1.5ms) limits inrush current during wake-up from sleep mode, preventing brown-out on shared 5V supply rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-buck PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20029ATIF/V+T | Same 1.5A×4 architecture but factory-set to 1.0V/1.8V/ADJ/3.3V outputs - no resistor programming needed for common SoC voltage combinations. | Preconfigured for mixed-voltage SoCs (e.g., NXP S32K, Renesas RH850); lacks flexibility of fully adjustable MAX20029ATIA/V+T. | Select when targeting known voltage sets to avoid custom trimming; MAX20029ATIA/V+T preferred for prototyping or multi-platform reuse. |
| TPS65321A-Q1 | Triple 2.5A/1.5A/1.5A buck + LDO; lower switching frequency (2.1MHz); no spread spectrum; different pinout and enable logic (active-low). | Better suited for high-current single-rail applications (e.g., motor control MCU); lacks phase interleaving and requires external feedback resistors. | Choose for higher current on one rail; MAX20029ATIA/V+T offers superior EMI performance and smaller total solution size for balanced quad loads. |
Compared with MAX20029ATIF/V+T and TPS65321A-Q1, the MAX20029ATIA/V+T provides full configurability across all four outputs without hardware changes, tighter thermal resistance (3°C/W vs. 5.2°C/W), and integrated 180° phasing - making it optimal for space-constrained, EMI-sensitive automotive compute modules.
Availability
MAX20029ATIA/V+T is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment SoC power delivery, telematics modules, and body control units requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MAX20029ATIA/V+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with AEC-Q100-qualified power solutions.
The MAX20029 series belongs to Analog Devices' automotive PMIC portfolio designed specifically for centralized domain controller architectures, emphasizing low EMI, high integration density, and functional safety compliance (ASIL-B ready).
FAQ
What is the maximum output current capability of each channel in the MAX20029ATIA/V+T?
The MAX20029ATIA/V+T supports up to 1.5A per channel across all four buck regulators. This rating is validated over the full -40°C to +125°C automotive temperature range and includes derating for thermal performance in typical PCB layouts. Each channel uses integrated low-RDS(ON) MOSFETs (125mΩ pMOS / 100mΩ nMOS) to maintain >92% efficiency at 1.5A load with 5V input and 3.3V output. The MAX20029ATIA/V+T does not support channel paralleling like the MAX20029B variants.
Does the MAX20029ATIA/V+T require external feedback resistors to set output voltages?
No, the MAX20029ATIA/V+T does not require external feedback resistors. It is factory-programmed with adjustable output voltage capability (1.0V to 4.0V) using internal trimming bits, achieving ±3% accuracy over temperature and load without external components. The OUTS pins are internally connected to a 1.0V reference; connecting OUTS to VOUT configures fixed 1.0V output, while resistor dividers may be added only if non-standard voltages outside the factory range are needed - which is not typical for MAX20029ATIA/V+T applications.
How does the spread-spectrum feature function in the MAX20029ATIA/V+T?
The MAX20029ATIA/V+T includes a factory-enabled spread-spectrum option that modulates the internal 2.2MHz oscillator frequency by ±3% at 1.5kHz rate, reducing peak radiated emissions in narrowband EMI scans. This feature operates only when the internal oscillator is active; it is disabled when an external clock is applied via the SYNC pin. Spread spectrum is implemented as linear frequency deviation and does not affect regulation accuracy, transient response, or power-good timing - verified per CISPR 25 testing in standard evaluation boards.
What thermal management provisions are built into the MAX20029ATIA/V+T package?
The MAX20029ATIA/V+T uses a 28-pin TQFN-EP package with a bottom-exposed thermal pad electrically and thermally connected to GND. With proper PCB layout - including ≥6 thermal vias under the pad connected to a solid inner-layer ground plane - the device achieves θJC = 3°C/W and supports >2W continuous power dissipation at +70°C ambient. The datasheet specifies 2285mW maximum power dissipation on a JEDEC-standard 4-layer board, and thermal shutdown activates at +185°C junction temperature with 15°C hysteresis to prevent permanent damage.
Can the MAX20029ATIA/V+T synchronize to an external clock, and what are the valid frequency ranges?
Yes, the MAX20029ATIA/V+T supports external clock synchronization via its dedicated SYNC pin, accepting square-wave inputs from 1.7MHz to 2.5MHz. When driven within this range, the internal PWM generators lock to the external clock edge, eliminating beat frequencies and enabling deterministic EMI alignment in multi-PMIC systems. If synchronization is not required, the SYNC pin must be tied to PGND_ to enable the internal 2.2MHz oscillator. The device maintains ±1% frequency accuracy and full protection functionality during synchronized operation.
MAX20029ATIA/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 4V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (5x5)
MAX20029ATIA/V+T FAQ
1.How can I place an order for MAX20029ATIA/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20029ATIA/V+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 MAX20029ATIA/V+T reliable?
The price and inventory of MAX20029ATIA/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20029ATIA/V+T is usually 5 days.
3.What payment methods are accepted for MAX20029ATIA/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20029ATIA/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20029ATIA/V+T?
MAX20029ATIA/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20029ATIA/V+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 MAX20029ATIA/V+T?
For technical support, including MAX20029ATIA/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20029ATIA/V+T requirements.
6.How does Aetrix verify that MAX20029ATIA/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20029ATIA/V+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 MAX20029ATIA/V+T meets industry standards.
7.What is the process for return or replacement of MAX20029ATIA/V+T?
All MAX20029ATIA/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20029ATIA/V+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 MAX20029ATIA/V+T part is unused and in its original packaging.
Return procedure for MAX20029ATIA/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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