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Analog Devices Inc./Maxim Integrated MAX20029BATIA/V+
- Part No.:
- MAX20029BATIA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20029BATIA/V+.pdf
- Description:
- IC REG BUCK ADJ 3A QUAD 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:240
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Product details
Overview
MAX20029BATIA/V+ from Analog Devices is an automotive-grade quad-output PMIC integrating four synchronous step-down DC-DC converters with factory-programmable output voltages, 3.0V–5.5V input range, 2.2MHz fixed-frequency PWM operation, and up to 3A combined channel capability (via channel 1+2 interleaving). It delivers precise power regulation for ADAS domain controllers and infotainment SoCs requiring multiple low-voltage rails.
For engineers reviewing the MAX20029BATIA/V+ datasheet, MAX20029BATIA/V+ pinout, MAX20029BATIA/V+ application, or MAX20029BATIA/V+ equivalent, key selection considerations include its 3A/1.5A/1.5A output current configuration, TQFN-28 exposed-pad package, -40°C to +125°C automotive qualification, spread-spectrum EMI reduction, and individual enable/PG outputs for sequencing-critical systems.
Technical Context
The MAX20029BATIA/V+ implements peak current-mode control with internal slope compensation and loop compensation, enabling stable all-ceramic capacitor designs. Its hybrid load-line architecture reduces required output capacitance while maintaining fast load-transient response (±5% deviation over 1A step).
It features two buck channels operating 180° out-of-phase to minimize input ripple and improve EMI performance, plus a SYNC input supporting external clock synchronization between 1.7MHz and 2.5MHz. Input overvoltage protection triggers at 5.8V (typ), and thermal shutdown activates at +185°C (typ) with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct connection to automotive battery rail with transient tolerance |
| Switching Frequency | 2.2MHz ±10% - enables compact 1.5µH inductors and all-ceramic output filtering |
| Output Current Capability | Channel 1: 3A (interleaved CH1+CH2), Channels 3 & 4: 1.5A each - meets multi-rail SoC core/I/O voltage requirements |
| Output Voltage Range | Adjustable 1.0V to 4.0V (factory-programmed or resistor-set) - covers DDR, PCIe, GPU, and logic supply needs |
| Operating Temperature | -40°C to +125°C - qualified for under-hood and dashboard-mounted automotive electronics |
| Protection Features | Cycle-by-cycle current limiting, input OV/UVLO, overtemperature shutdown, open-drain PG outputs - ensures robust fault handling in harsh environments |
| Package | 28-pin TQFN (5mm × 5mm × 0.8mm) with exposed pad - provides low θJC = 3°C/W for high-power density thermal management |
Pinout & Package
MAX20029BATIA/V+ uses a 28-pin thermally enhanced TQFN package (5mm × 5mm, 0.8mm height) with exposed pad connected to GND for optimal heat dissipation. The pinout supports independent enable/control of four buck regulators and includes dedicated LX, PV, PGND, and OUTS terminals per channel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 | Active-high enable for Buck 1 | Starts 3A interleaved output; tied high or controlled by system sequencer |
| LX1/LX2 | Switching nodes for Buck 1 & 2 | Connected externally to form single 3A phase; requires low-inductance layout |
| PGND1–PGND4 | Power ground returns per channel | Must be routed separately to minimize cross-talk and ground bounce |
| OUTS1–OUTS4 | Voltage sense inputs | Enable precision feedback; OUTS2 grounded for MAX20029B variant per datasheet |
| PG1/PG3/PG4 | Open-drain power-good outputs | Signal regulation status; require external pull-up to VA (≤VA) for logic-level interface |
| SYNC | External clock synchronization input | Accepts 1.7–2.5MHz clock; connect to PGND if unused to retain internal 2.2MHz oscillator |
Key Features
| Feature | Design Value |
|---|---|
| Interleaved 3A output (CH1+CH2) | Reduces input RMS current by ~30% vs. single-phase 3A design, lowering input capacitor stress |
| 180° out-of-phase CH3/CH4 operation | Cuts input ripple amplitude by >50%, allowing smaller bulk input capacitance |
| Factory-programmable PG timeout | 20,480-cycle delay (vs. 256-cycle default) prevents false resets during slow-start or brownout recovery |
| Integrated current sensing & compensation | Eliminates need for external current-sense resistors and compensation networks, saving board space |
| Spread-spectrum option disabled | Maximizes switching frequency stability for noise-sensitive RF or ADC subsystems |
Applications
| ADAS Domain Controller Power | Automotive Infotainment SoC |
|---|---|
Use Scenario: Powers NVIDIA Orin or Qualcomm SA8155P SoC with multiple voltage rails (core, GPU, I/O, memory). IC Role / Device Role / Timing Role: Primary quad-rail PMIC delivering 3A @ 1.0V (CPU core), 1.5A @ 1.8V (GPU), 1.5A @ 3.3V (I/O), with precise sequencing via EN/PG signals. Use Value: Enables single-chip power solution replacing discrete DC-DCs, reducing BOM count by 4x and PCB area by 35%. |
Use Scenario: Supplies Renesas R-Car H3 processor in digital cockpit systems with strict EMI limits. IC Role / Device Role / Timing Role: Provides synchronized, low-noise 1.1V/1.8V/3.3V rails with 180° phase-shifted CH3/CH4 to suppress AM-band emissions. Use Value: Meets CISPR-25 Class 5 radiated emissions without added shielding, cutting system cost by $1.20/unit. |
| Automotive Telematics Unit | Electric Vehicle Battery Management Interface |
Use Scenario: Powers u-blox cellular modem, GNSS receiver, and CAN transceiver in telematics control unit (TCU). IC Role / Device Role / Timing Role: Delivers 1.5A @ 1.2V (modem core), 1.5A @ 3.3V (GNSS), and 3A @ 1.8V (interface logic) with independent enable control. Use Value: Supports cold-cranking down to 3.0V input while maintaining all outputs regulated - critical for vehicle start-stop operation. |
Use Scenario: Supplies isolated microcontroller, signal conditioning circuitry, and CAN FD transceiver in BMS master module. IC Role / Device Role / Timing Role: Generates 3.3V (MCU), 1.8V (ADC reference), and 5.0V (isolated gate driver bias) with UVLO lockout at 2.77V to prevent erratic behavior during battery sag. Use Value: Integrates OV/UVLO, thermal shutdown, and cycle-by-cycle current limiting - eliminates need for external protection ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-output automotive PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20029ATIA/V+ | Four independent 1.5A channels; no interleaving; 256-cycle PG timeout | Better suited for non-interleaved, balanced multi-rail loads (e.g., radar sensors) | Select when 3A single-rail demand is absent and tighter PG timing is required |
| TPS659422RGER | TI device with 4 buck + 3 LDOs; 2.2MHz switching; 1.2V–3.6V outputs; QFN-40 | Higher integration (LDOs included); larger footprint; different pinout and sequencing logic | Choose when mixed buck/LDO regulation is needed and board space allows larger package |
Compared with MAX20029ATIA/V+, MAX20029BATIA/V+ trades balanced channel current for higher single-rail capability and longer PG timeout - ideal for CPU-centric loads. Against TPS659422RGER, it offers smaller footprint and simpler sequencing but lacks integrated LDOs, requiring external regulators for analog supplies.
Availability
MAX20029BATIA/V+ is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment SoC power delivery, and telematics units requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX20029BATIA/V+ 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, and communications markets with precision power, sensing, and signal chain solutions.
The MAX20029 family is part of Analog Devices' automotive power-management portfolio, designed specifically for demanding point-of-load regulation in ADAS, infotainment, and body electronics where EMI, thermal efficiency, and AEC-Q100 compliance are critical.
FAQ
What is the maximum output current configuration supported by MAX20029BATIA/V+?
MAX20029BATIA/V+ supports a 3A output on Channel 1 achieved by interleaving Channels 1 and 2, plus independent 1.5A outputs on Channels 3 and 4. This configuration is factory-set and cannot be reprogrammed in-circuit. The 3A capability is validated per the Absolute Maximum Ratings (LX continuous RMS current = 2.0A per pin, with dual-LX paralleling enabling 3A total), and thermal performance must be verified using the provided θJA = 35°C/W and θJC = 3°C/W values in the target PCB layout.
How does the MAX20029BATIA/V+ handle power sequencing for multi-rail systems?
MAX20029BATIA/V+ provides individual active-high enable inputs (EN1–EN4) and open-drain power-good outputs (PG1, PG3, PG4) for precise sequencing control. EN1 initiates the 3A rail, while PG outputs assert after soft-start completion and remain high only when their respective output is within ±6% of nominal. The factory-programmed 20,480-cycle PG timeout (vs. 256 cycles in base variants) accommodates slower-rising rails in complex SoC power trees, ensuring reliable handoff to downstream logic.
Is spread-spectrum modulation enabled on the MAX20029BATIA/V+?
No, spread-spectrum modulation is disabled on MAX20029BATIA/V+ as indicated in the Selector Guide. This preserves strict 2.2MHz switching frequency stability, which is advantageous in systems sensitive to frequency-dependent interference - such as RF front-ends or high-resolution ADCs. EMI reduction is instead achieved through 180° phase interleaving of Channels 3 and 4 and optimized PCB layout per the datasheet guidelines.
What is the role of the OUTS2 pin on MAX20029BATIA/V+?
On MAX20029BATIA/V+, the OUTS2 pin is grounded per the MAX20029B variant specification. This disables the feedback path for Channel 2, which is internally paralleled with Channel 1 to form the 3A output. Grounding OUTS2 ensures correct regulation of the combined output using only the Channel 1 feedback network (OUTS1), eliminating potential instability from dual-sense configurations.
Does MAX20029BATIA/V+ support external clock synchronization?
Yes, MAX20029BATIA/V+ includes a dedicated SYNC pin that accepts an external clock signal between 1.7MHz and 2.5MHz to synchronize its internal oscillator. When not used, SYNC must be connected to PGND to maintain default 2.2MHz operation. Synchronization enables deterministic switching timing across multiple PMICs or with system clocks, reducing beat frequencies and improving EMI predictability in multi-rail designs.
MAX20029BATIA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tube
- 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:
- 3A
- 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)
MAX20029BATIA/V+ FAQ
1.How can I place an order for MAX20029BATIA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20029BATIA/V+ 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 MAX20029BATIA/V+ reliable?
The price and inventory of MAX20029BATIA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20029BATIA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20029BATIA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20029BATIA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20029BATIA/V+?
MAX20029BATIA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20029BATIA/V+ 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 MAX20029BATIA/V+?
For technical support, including MAX20029BATIA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20029BATIA/V+ requirements.
6.How does Aetrix verify that MAX20029BATIA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20029BATIA/V+ 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 MAX20029BATIA/V+ meets industry standards.
7.What is the process for return or replacement of MAX20029BATIA/V+?
All MAX20029BATIA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20029BATIA/V+, 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 MAX20029BATIA/V+ part is unused and in its original packaging.
Return procedure for MAX20029BATIA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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