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Analog Devices Inc./Maxim Integrated MAX20029ATIB/V+
- Part No.:
- MAX20029ATIB/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20029ATIB/V+.pdf
- Description:
- IC REG BUCK ADJ 1.5A QUAD 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,378
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Product details
Overview
MAX20029ATIB/V+ from Analog Devices is an automotive-grade quad-output PMIC integrating four synchronous step-down DC-DC converters with factory-programmed output voltages of 1.5V, 1.8V, 1.15V, and 1.4V; supports 3.0V–5.5V input, delivers up to 1.5A per channel, and operates at 2.2MHz for compact all-ceramic designs in ADAS domain controllers and infotainment power rails.
For engineers reviewing the MAX20029ATIB/V+ datasheet, MAX20029ATIB/V+ pinout, MAX20029ATIB/V+ application, or MAX20029ATIB/V+ equivalent, key selection criteria include its 28-pin TQFN-EP package, spread-spectrum EMI reduction, individual enable/PG outputs, -40°C to +125°C operation, and factory-set 1.15V/1.4V dual low-voltage rails for SoC I/O and core logic sequencing.
Technical Context
The MAX20029ATIB/V+ uses peak current-mode control with internal slope compensation and fixed-frequency PWM at 2.2MHz, enabling stable regulation across load, line, and temperature with ±3% output accuracy. Its hybrid load-line architecture reduces required output capacitance while maintaining fast transient response.
Two buck channels (OUT3/OUT4) operate 180° out-of-phase to minimize input ripple and EMI; all four channels support forced-PWM mode outside the AM band and accept external synchronization via the SYNC pin (1.7–2.5MHz). Input overvoltage protection triggers at 5.8V, and thermal shutdown activates at +185°C 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 UVLO at 2.68V and OV threshold at 5.8V. |
| Output Voltages (Factory-Set) | 1.5V, 1.8V, 1.15V, 1.4V - eliminates need for external feedback resistors and ensures ±3% accuracy over -40°C to +125°C. |
| Max Output Current per Channel | 1.5A (CH1–CH4) - enables single-chip power delivery for multi-rail SoC subsystems without external current sharing. |
| Switching Frequency | 2.2MHz (±10%) - allows use of small 1.5µH inductors and 2.2µF ceramic input capacitors per rail. |
| Spread Spectrum | +3% frequency deviation - reduces peak radiated emissions without requiring layout changes or added filtering. |
| Thermal Shutdown Threshold | +185°C junction temperature - protects against sustained overload or poor PCB thermal design in under-hood environments. |
| Operating Temperature Range | -40°C to +125°C - qualified for AEC-Q100 Grade 1 and suitable for engine bay and dashboard-mounted ECUs. |
Pinout & Package
MAX20029ATIB/V+ is housed in a 28-pin, 5mm × 5mm × 0.8mm TQFN-EP package with exposed thermal pad (EP = GND), optimized for automotive thermal and EMI requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN4 | Active-high digital enable inputs | Independent control of each buck converter; pull-down resistance 100kΩ enables simple microcontroller GPIO interfacing. |
| PG1–PG4 | Open-drain power-good outputs | Assert low during soft-start, fault, or undervoltage; require external pull-up ≤ VA for sequenced system reset signaling. |
| LX1–LX4 | Switching node terminals | High-impedance when disabled; connect LX1/LX2 together only on MAX20029B/D variants - not applicable here. |
| OUTS1–OUTS4 | Voltage sense inputs | Direct connection to output capacitor for precision regulation; factory-trimmed reference (1.0V) enables accurate fixed-voltage operation. |
| SYNC | External clock synchronization input | Accepts 1.7–2.5MHz CMOS signal; tie to PGND_ to use internal 2.2MHz oscillator. |
| VA | Analog supply voltage | Must be decoupled with ≥1µF ceramic cap to GND; powers internal reference and control circuitry independently of PV_ rails. |
Key Features
| Feature | Design Value |
|---|---|
| Quad synchronous buck converters with integrated FETs | Eliminates 8 external MOSFETs and associated gate drivers, reducing BOM count and board area by >40% vs discrete solutions. |
| 180° phase interleaving on OUT3/OUT4 | Cuts input ripple current amplitude by ~70%, allowing smaller bulk input capacitors and easing EMI filter design. |
| Factory-programmed output voltages | Guarantees 1.15V/1.4V/1.5V/1.8V accuracy without external resistors - critical for noise-sensitive analog and low-voltage logic rails. |
| Individual soft-start and PG timing | 256-cycle PG timeout enables precise power sequencing across multiple voltage domains in complex SoC systems. |
| Integrated current sensing and loop compensation | Removes need for external current-sense resistors and compensation networks, simplifying layout and improving reliability. |
Applications
| ADAS Domain Controller Power | Automotive Infotainment SoC |
|---|---|
Use Scenario: Powers vision processor, radar MCU, and CAN/FlexRay transceivers in centralized ADAS ECU with strict EMI limits and thermal constraints. IC Role / Device Role / Timing Role: Primary quad-rail PMIC delivering 1.15V core, 1.4V I/O, 1.5V memory, and 1.8V interface supplies with synchronized startup and independent fault reporting. Use Value: 180° phasing and spread-spectrum reduce conducted emissions below CISPR 25 Class 5 limits; -40°C to +125°C rating ensures operation near engine compartment. |
Use Scenario: Supplies multi-core application processor, GPU, DDR memory, and display interface in head-unit with dynamic load profiles. IC Role / Device Role / Timing Role: Centralized power manager providing sequenced 1.5V/1.8V/1.15V rails with individual EN/PG control for safe boot and thermal throttling coordination. Use Value: Factory-set outputs eliminate resistor tolerance drift; 2.2MHz switching enables <1mm² per rail solution size using 1.5µH inductors and 22µF ceramic caps. |
| Automotive Telematics Module | Body Control Module (BCM) |
Use Scenario: Powers LTE modem, GNSS receiver, and secure element in cellular-connected telematics unit with aggressive size and thermal targets. IC Role / Device Role / Timing Role: Compact quad-buck regulator delivering 1.4V RF front-end, 1.5V baseband, 1.8V interface, and 1.15V crypto core with minimal external components. Use Value: Exposed-pad TQFN package achieves 3°C/W θJC; combined with forced-PWM mode, maintains regulation stability during GSM burst transmission current spikes. |
Use Scenario: Supplies microcontroller, LIN transceivers, LED drivers, and sensor interfaces in distributed body electronics with long-term reliability demands. IC Role / Device Role / Timing Role: Robust power source supporting 15-year vehicle lifecycle; provides fault-isolated 1.5V/1.8V rails with overtemperature and short-circuit protection. Use Value: Input OV/UVLO and thermal shutdown protect against battery jump-start transients and under-hood ambient extremes; AEC-Q100 qualification ensures field longevity. |
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 |
|---|---|---|---|
| MAX20029ATIF/V+ | Same package and pinout; factory-set outputs at 1.0V/1.8V/ADJ/3.3V instead of 1.5V/1.8V/1.15V/1.4V. | Suitable for designs requiring 3.3V I/O rail and adjustable 1.0V core voltage, but lacks 1.15V/1.4V pairing for modern low-Vdd SoCs. | Select when 3.3V interface supply is mandatory and 1.15V/1.4V rails are not required. |
| TPS65321A-Q1 | Triple-output (not quad); max 2.5A on main rail; no spread-spectrum; 2.1MHz switching; different pinout and enable logic. | Used in simpler safety-critical MCUs (e.g., TMS570), not complex multi-rail SoCs; lacks independent PG per rail and 180° phasing. | Choose only for cost-sensitive, lower-complexity applications where quad output and advanced EMI features are unnecessary. |
Compared with MAX20029ATIF/V+, the MAX20029ATIB/V+ offers tighter matching for dual low-voltage SoC domains (1.15V/1.4V), while versus TPS65321A-Q1 it provides higher integration, superior EMI control, and full quad-rail flexibility essential for next-gen automotive processors.
Availability
MAX20029ATIB/V+ is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment SoC power management, and telematics modules requiring stable component supply across extended vehicle lifecycles.
Supply support for MAX20029ATIB/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, communications, and healthcare markets.
The MAX20029 series belongs to Analog Devices' automotive power-management portfolio, designed specifically for demanding point-of-load regulation in ADAS, infotainment, and telematics systems with stringent EMI, thermal, and reliability requirements.
FAQ
What output voltages are factory-programmed in the MAX20029ATIB/V+?
The MAX20029ATIB/V+ has four factory-programmed output voltages: 1.5V (CH1), 1.8V (CH2), 1.15V (CH3), and 1.4V (CH4). These values are laser-trimmed during production and do not require external feedback resistors. The 1.15V and 1.4V outputs are specifically optimized for low-voltage SoC I/O and core logic rails, ensuring ±3% accuracy across -40°C to +125°C.
Does the MAX20029ATIB/V+ support external clock synchronization?
Yes, the MAX20029ATIB/V+ supports external clock synchronization via its dedicated SYNC pin, which accepts input frequencies from 1.7MHz to 2.5MHz. When SYNC is left unconnected or tied to PGND_, the device operates at its internal 2.2MHz switching frequency. This feature enables system-level EMI reduction by aligning switching edges across multiple PMICs or with other clock domains in the vehicle network.
How does the MAX20029ATIB/V+ reduce electromagnetic interference?
The MAX20029ATIB/V+ reduces EMI through three integrated mechanisms: 180° phase interleaving between OUT3 and OUT4 to cancel input ripple, a programmable ±3% spread-spectrum option that smears spectral energy, and forced-PWM operation outside the AM radio band (0.53–1.71MHz). These features collectively lower peak radiated emissions without requiring additional shielding or ferrite beads in compliant automotive designs.
What thermal performance can be expected from the MAX20029ATIB/V+ in a standard 4-layer PCB?
In a JEDEC-standard 4-layer board, the MAX20029ATIB/V+ exhibits a junction-to-ambient thermal resistance (θJA) of 35°C/W and junction-to-case (θJC) of 3°C/W. With proper layout - including soldering the exposed pad to a large internal ground plane using ≥8 thermal vias - the device sustains continuous 1.5A per channel at +125°C ambient. Derating curves in the datasheet confirm 2285mW maximum power dissipation at TA = +70°C.
Can the MAX20029ATIB/V+ be used in non-automotive industrial applications?
While the MAX20029ATIB/V+ is AEC-Q100 qualified and optimized for automotive (-40°C to +125°C), its electrical specifications - 3.0V–5.5V input, 2.2MHz switching, and robust protection features - make it suitable for industrial applications requiring high reliability and EMI control. However, users must verify that the factory-set 1.15V/1.4V/1.5V/1.8V outputs match their system's rail requirements, as these cannot be adjusted post-manufacture.
MAX20029ATIB/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:
- 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)
MAX20029ATIB/V+ FAQ
1.How can I place an order for MAX20029ATIB/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20029ATIB/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 MAX20029ATIB/V+ reliable?
The price and inventory of MAX20029ATIB/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20029ATIB/V+ is usually 5 days.
3.What payment methods are accepted for MAX20029ATIB/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20029ATIB/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20029ATIB/V+?
MAX20029ATIB/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20029ATIB/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 MAX20029ATIB/V+?
For technical support, including MAX20029ATIB/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20029ATIB/V+ requirements.
6.How does Aetrix verify that MAX20029ATIB/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20029ATIB/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 MAX20029ATIB/V+ meets industry standards.
7.What is the process for return or replacement of MAX20029ATIB/V+?
All MAX20029ATIB/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20029ATIB/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 MAX20029ATIB/V+ part is unused and in its original packaging.
Return procedure for MAX20029ATIB/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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