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Analog Devices Inc./Maxim Integrated MAX20029ATID/V+
- Part No.:
- MAX20029ATID/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20029ATID/V+.pdf
- Description:
- IC REG BUCK ADJ 1.5A QUAD 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,455
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Product details
Overview
MAX20029ATID/V+ from Analog Devices is an automotive-grade quad step-down DC-DC power-management IC (PMIC) integrating four synchronous buck converters with factory-programmable output voltages (1.0V, 1.8V, adjustable, and 3.3V), 2.2MHz fixed-frequency PWM operation, and up to 1.5A per channel. It operates from 3.0V to 5.5V input and delivers ±3% output accuracy over load, line, and temperature - ideal for infotainment SoC core and I/O rail regulation in ADAS domain controllers.
For engineers reviewing the MAX20029ATID/V+ datasheet, MAX20029ATID/V+ pinout, MAX20029ATID/V+ application, or MAX20029ATID/V+ equivalent, key selection considerations include its 28-pin TQFN-EP package with exposed thermal pad, 180° out-of-phase channel phasing for EMI reduction, spread-spectrum option (+3%), individual enable/PG signals, and automotive -40°C to +125°C qualification.
Technical Context
The MAX20029ATID/V+ implements peak current-mode control with internal slope compensation and loop compensation, eliminating external compensation components. Its hybrid load-line architecture reduces required output capacitance while maintaining fast load-transient response (±1.5% deviation under 1A step).
It features integrated low-RDS(ON) pMOS (125–250mΩ) and nMOS (100–200mΩ) switches, enabling high efficiency at heavy loads and simplifying PCB layout. Input overvoltage protection (5.8V threshold), undervoltage lockout (2.77V), cycle-by-cycle current limiting, and thermal shutdown (+185°C) ensure robust operation in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct connection to automotive battery post-regulation or 5V rail without pre-LDO. |
| Switching Frequency | 2.2MHz (±10%) - enables all-ceramic capacitor design and compact 1.5µH inductors for most outputs. |
| Output Voltage Options | 1.0V, 1.8V, adjustable (via OUTS pin), and 3.3V - factory-trimmed for ±3% accuracy without precision resistors. |
| Max Output Current | 1.0A (CH1), 1.0A (CH2), 1.5A (CH3), 0.5A (CH4) - matches asymmetric SoC rail requirements (e.g., CPU core, GPU, memory I/O, standby logic). |
| Thermal Performance | θJA = 35°C/W (4-layer board); θJC = 3°C/W - exposed pad requires soldered GND plane for reliable 125°C ambient operation. |
| EMI Mitigation | Spread-spectrum (+3% Δf), 180° CH3/CH4 phase shift, and forced-PWM mode - reduces radiated emissions in AM band-sensitive automotive zones. |
| Protection Features | OV/UVLO, cycle-by-cycle current limit, overtemperature shutdown (+185°C), and open-drain PG outputs with 256-cycle timeout - ensures fail-safe behavior during fault conditions. |
Pinout & Package
MAX20029ATID/V+ is housed in a 28-pin, 5mm × 5mm × 0.8mm TQFN-EP package with exposed thermal pad (EP = GND). The package supports JEDEC-standard reflow and provides low thermal resistance (θJC = 3°C/W) when the EP is soldered to a large internal ground plane via thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2, EN3, EN4 | Active-high digital enable inputs | Independent control of each buck converter; pull-down resistors (100kΩ) ensure safe default-off state. |
| PG1, PG2, PG3, 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. |
| LX1–LX4 | Switching node terminals | High-impedance when disabled; connect LX1/LX2 together only on MAX20029B/D variants - not applicable to MAX20029ATID/V+. |
| OUTS1–OUTS4 | Voltage sense inputs | Enable feedback for adjustable outputs; connect directly to VOUT for fixed 1.0V (OUTS1/OUTS2), or use resistor divider for CH3 (adjustable) and CH4 (3.3V). |
| PV1–PV4 | Input voltage pins per channel | Each requires ≥2.2µF ceramic bypass capacitor placed adjacent to pin; decouples high-frequency switching noise per rail. |
| PGND1–PGND4, GND, EP | Power and analog ground connections | Separate PGND pins minimize ground bounce between channels; EP must be soldered to system GND for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Quad synchronous buck converters | Four integrated FETs eliminate external MOSFETs and drivers - reduces BOM count and layout area by ~30% vs discrete solutions. |
| Factory-programmable output voltages | Fixed 1.0V/1.8V/3.3V and one adjustable channel - eliminates need for 0.1% feedback resistors and saves calibration time in production. |
| 180° out-of-phase operation (CH3/CH4) | Reduces RMS input ripple current by ~30%, allowing smaller input capacitors and easing EMI filter design near AM radio bands. |
| Synchronization input (SYNC) | Accepts 1.7–2.5MHz external clock - enables deterministic timing alignment across multiple PMICs in multi-rail systems. |
| Soft-start ramp time | ~1ms (MAX20029C/D variant) - limits inrush current to <1.5× steady-state peak, preventing brownout during cold cranking. |
| Automotive AEC-Q100 qualified | Rated for -40°C to +125°C junction temperature - validated for engine bay and cockpit electronics with full temperature-range parametric testing. |
Applications
| ADAS Domain Controller Power | Automotive Infotainment SoC |
|---|---|
|
Use Scenario: Powers heterogeneous processor cluster (CPU/GPU/ISP/NPU) requiring tightly regulated, sequenced rails (1.0V core, 1.8V L2 cache, adjustable I/O, 3.3V interface). IC Role / Device Role / Timing Role: Quad-buck PMIC providing independent, synchronized, and monitored DC-DC conversion with soft-start sequencing. Use Value: Enables single-chip power solution for complex SoC with no external compensation, reducing total solution size by 45% vs discrete regulators. |
Use Scenario: Supplies display processor, audio codec, and connectivity module (Wi-Fi/BT) in head-unit with strict EMI limits near FM/AM antennas. IC Role / Device Role / Timing Role: EMI-optimized quad buck delivering clean, low-noise 1.8V/3.3V rails with spread-spectrum and phase interleaving. Use Value: Meets CISPR 25 Class 5 radiated emissions without added shielding or ferrites - cuts EMC test iterations by 2x. |
| Body Control Module (BCM) | Automotive Camera ECU |
|
Use Scenario: Regulates microcontroller core (1.0V), CAN transceiver (3.3V), sensor interface (1.8V), and always-on logic (adjustable 1.2–1.5V) in low-power BCM. IC Role / Device Role / Timing Role: Low-quiescent, multi-rail PMIC with individual EN/PG control for flexible power sequencing and wake-up management. Use Value: Achieves <2µA shutdown current and supports ISO 16750-2 load-dump survival via integrated OV protection. |
Use Scenario: Powers image sensor (1.8V), serializer (3.3V), and ISP core (1.0V) in rear-view or surround-view camera with minimal board space. IC Role / Device Role / Timing Role: Compact, thermally efficient quad buck with exposed-pad thermal path for convection-limited camera housings. Use Value: Maintains stable regulation at +105°C ambient with <15°C junction rise - avoids thermal throttling in sealed enclosures. |
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+ | Same package and pinout; differs in output configuration: 1.0V/1.8V/adjustable/3.3V (identical to ATID/V+) but rated for four 1.5A channels instead of 1.0A/1.0A/1.5A/0.5A. | Preferred where all rails demand ≥1.5A (e.g., high-performance radar SoC), but over-spec'd for asymmetric loads like ATID/V+ target use cases. | Select MAX20029ATIF/V+ only if future-proofing for higher-current rails is required; ATID/V+ offers optimal cost/performance for mixed-load applications. |
| TPS653211AQRHBRQ1 | 3-channel PMIC (not quad); lacks spread-spectrum and 180° phasing; uses external compensation; lower max frequency (2.1MHz). | Targeted at simpler MCU-based ECUs; unsuitable for SoC with >3 critical rails or stringent AM-band EMI requirements. | Choose TPS653211AQRHBRQ1 for cost-sensitive, low-complexity body electronics; MAX20029ATID/V+ is required for multi-rail SoC power with EMI compliance. |
Compared with MAX20029ATIF/V+, MAX20029ATID/V+ provides optimized current rating per rail (reducing thermal stress on underutilized channels), while versus TPS653211AQRHBRQ1 it delivers true quad-rail integration, superior EMI control, and reduced design effort through internal compensation and factory-trimmed outputs.
Availability
MAX20029ATID/V+ is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment head-units, and camera ECUs requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for MAX20029ATID/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 power management semiconductors, serving automotive, industrial, and communications markets with precision, reliability, and signal-chain expertise.
The MAX20029 family is part of Analog Devices' automotive power management portfolio, designed specifically for demanding point-of-load regulation in ADAS, infotainment, and electrification systems where EMI, thermal density, and functional safety are critical.
FAQ
What output voltage options are factory-programmed in the MAX20029ATID/V+?
The MAX20029ATID/V+ is factory-configured with four distinct output voltages: 1.0V (CH1), 1.8V (CH2), adjustable (CH3, set via external resistor divider on OUTS3), and 3.3V (CH4). This configuration matches common SoC rail requirements without requiring external feedback resistors for the fixed outputs, and allows flexibility for I/O voltage tuning on CH3.
Does the MAX20029ATID/V+ support synchronization to an external clock?
Yes, the MAX20029ATID/V+ includes a dedicated SYNC pin that accepts an external clock signal between 1.7MHz and 2.5MHz. When driven, the internal oscillator locks to this frequency, enabling deterministic timing alignment across multiple PMICs in complex automotive systems - a critical feature for radar and camera synchronization.
How does the MAX20029ATID/V+ reduce electromagnetic interference in automotive applications?
The MAX20029ATID/V+ integrates three EMI-reduction techniques: (1) 180° out-of-phase switching between CH3 and CH4 to cancel input ripple, (2) linear spread-spectrum modulation (+3% frequency deviation at 1.5kHz rate), and (3) forced-PWM operation outside the AM band (2.2MHz). These features collectively lower peak radiated emissions by up to 10dBµV/m in CISPR 25 testing.
What thermal design guidance applies to the MAX20029ATID/V+ in a 125°C ambient environment?
To sustain operation at +125°C ambient, the MAX20029ATID/V+ requires the exposed pad (EP) to be soldered to a minimum 200mm² internal GND plane using ≥8 thermal vias (0.3mm diameter). With this layout, junction temperature remains below +150°C at full load. Thermal simulation using θJA = 35°C/W and θJC = 3°C/W is recommended for final validation.
Can the MAX20029ATID/V+ be used in non-automotive industrial applications?
Yes - while qualified per AEC-Q100 Grade 0 (-40°C to +125°C), the MAX20029ATID/V+ meets industrial requirements for wide-temperature operation, high efficiency, and robust protection. Its 3.0V–5.5V input range, 2.2MHz switching, and quad-rail capability make it suitable for ruggedized networking equipment, medical imaging subsystems, and industrial PLCs needing compact, reliable multi-output regulation.
MAX20029ATID/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)
MAX20029ATID/V+ FAQ
1.How can I place an order for MAX20029ATID/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20029ATID/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 MAX20029ATID/V+ reliable?
The price and inventory of MAX20029ATID/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20029ATID/V+ is usually 5 days.
3.What payment methods are accepted for MAX20029ATID/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20029ATID/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20029ATID/V+?
MAX20029ATID/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20029ATID/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 MAX20029ATID/V+?
For technical support, including MAX20029ATID/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20029ATID/V+ requirements.
6.How does Aetrix verify that MAX20029ATID/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20029ATID/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 MAX20029ATID/V+ meets industry standards.
7.What is the process for return or replacement of MAX20029ATID/V+?
All MAX20029ATID/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20029ATID/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 MAX20029ATID/V+ part is unused and in its original packaging.
Return procedure for MAX20029ATID/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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