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Analog Devices Inc./Maxim Integrated MAX20029ATIF/V+
- Part No.:
- MAX20029ATIF/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20029ATIF/V+.pdf
- Description:
- IC REG BUCK ADJ 1.5A QUAD 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:296
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Product details
Overview
MAX20029ATIF/V+ from Analog Devices is an automotive-grade quad synchronous step-down DC-DC PMIC integrating four high-efficiency buck converters with factory-programmed output voltages of 1.0V, 1.8V, adjustable (ADJ), and 3.3V; supports 1.5A per channel; operates from 3.0V to 5.5V input; features 2.2MHz fixed-frequency PWM operation and spread-spectrum EMI reduction; used in ADAS domain controllers and infotainment power rails.
For engineers reviewing the MAX20029ATIF/V+ datasheet, MAX20029ATIF/V+ pinout, MAX20029ATIF/V+ application, or MAX20029ATIF/V+ equivalent, key selection criteria include per-channel current capability (1.5A ×4), factory-set output voltage configuration (1.0V/1.8V/ADJ/3.3V), 28-pin TQFN-EP package thermal performance (θJC = 3°C/W), automotive -40°C to +125°C operation, and SYNC input for external clock synchronization.
Technical Context
The MAX20029ATIF/V+ implements peak current-mode control with internal slope compensation and loop compensation, enabling stable regulation without external compensation components. It uses integrated low-RDS(ON) pMOS (125–250mΩ) and nMOS (100–200mΩ) switches optimized for ceramic-capacitor-based all-ceramic designs at 2.2MHz switching frequency.
Two of its four buck channels (OUT3/OUT4) operate 180° out-of-phase to reduce input ripple and required input capacitance; spread-spectrum modulation (±3% deviation at 1.5kHz) is factory-enabled; all channels maintain constant PWM mode outside the AM band and support individual enable inputs and open-drain power-good outputs with programmable timeout (256 cycles).
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 up to 6.0V absolute max. |
| Output Voltage Setpoints | 1.0V, 1.8V, adjustable (via external resistor divider), 3.3V - factory-programmed for precise rail generation without external feedback resistors on fixed outputs. |
| Per-Channel Output Current | 1.5A ×4 - enables independent powering of multiple SoC cores, memory, and interface ICs in compact automotive ECUs. |
| Switching Frequency | 2.2MHz (±10%) - allows use of small 1.5µH inductors and 2.2µF ceramic input capacitors per channel, minimizing board area. |
| Thermal Performance | θJC = 3°C/W - exposed pad enables efficient heat transfer to PCB ground plane, supporting continuous 1.5A operation at +125°C ambient. |
| EMI Mitigation | Factory-enabled spread-spectrum (±3%), 180° phase interleaving on OUT3/OUT4, and forced-PWM mode - reduces peak radiated emissions across CISPR 25 Class 5 limits. |
| Protection Features | Input overvoltage lockout (5.8V typ), cycle-by-cycle current limiting, thermal shutdown at +185°C (15°C hysteresis), and open-drain PG_ outputs with 15µs fault detection latency. |
Pinout & Package
MAX20029ATIF/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 achieves θJA = 35°C/W on a four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN4 | Active-high digital enable inputs | Independent control of each buck converter; pulled down internally (100kΩ) for default disable; enables precise power sequencing. |
| PG1–PG4 | Open-drain power-good outputs | Assert high when output is within ±6% of nominal; require external pull-up to VA (≤VA); timeout set to 256 switching cycles. |
| OUTS1–OUTS4 | Voltage sense inputs | Connect directly to output capacitor for regulation; OUTS3 is adjustable via external resistor divider; others tied to VOUT for fixed outputs. |
| LX1–LX4 | Switching node terminals | High-impedance when disabled; drive external inductors; LX3/LX4 are 180° out-of-phase to reduce input ripple current. |
| PV1–PV4 | Power input pins per channel | Each requires ≥2.2µF ceramic bypass capacitor placed adjacent to pin; decouples high-frequency switching noise per rail. |
| PGND1–PGND4 | Power ground returns per channel | Separate low-impedance return paths minimize ground bounce and cross-regulator coupling; must be connected to EP and system GND. |
| SYNC | External clock synchronization input | Accepts 1.7–2.5MHz square wave; disables internal oscillator when driven; connects to PGND_ to use default 2.2MHz frequency. |
| VA | Analog supply reference | Supplies internal reference and control circuitry; requires ≥1µF ceramic capacitor to GND; must be tied to same potential as PV_ inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Quad synchronous buck architecture | Four fully independent 1.5A regulators in single 5mm × 5mm package - eliminates discrete DC-DC solutions and reduces BOM count by ≥12 components. |
| Factory-programmed output voltages | 1.0V, 1.8V, adjustable, and 3.3V configured at wafer level - achieves ±3% output accuracy without precision external resistors or layout-sensitive feedback traces. |
| Phase-interleaved operation | OUT3 and OUT4 operate 180° out-of-phase - cuts RMS input ripple current by ~30%, allowing smaller input capacitors and lower EMI filter cost. |
| Spread-spectrum modulation | ±3% frequency dither at 1.5kHz - spreads spectral energy to reduce peak radiated emissions, easing CISPR 25 Class 5 compliance without added shielding. |
| Automotive-grade reliability | -40°C to +125°C operation with AEC-Q100 qualification - includes input OV/UVLO, thermal shutdown, and cycle-by-cycle current limiting for harsh vehicle environments. |
Applications
| ADAS Domain Controller Power | Infotainment System Core Rails |
|---|---|
Use Scenario: Powers vision processor, radar SoC, and CAN/FlexRay transceivers in centralized ADAS ECU with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Quad buck PMIC delivering isolated 1.0V (core), 1.8V (I/O), adjustable (DDR termination), and 3.3V (peripheral) rails with synchronized soft-start and sequenced PG_ asserts. Use Value: Phase interleaving and spread-spectrum reduce conducted/radiated emissions below CISPR 25 Class 5 limits; 2.2MHz operation enables compact 1.5µH inductors and 2.2µF input caps per rail. |
Use Scenario: Supplies multi-core application processor, LPDDR4 memory, audio codec, and display interface in automotive head unit. IC Role / Device Role / Timing Role: Single-chip power solution generating four regulated rails with independent enable control and power-good monitoring for safe boot sequencing. Use Value: Factory-set 1.0V/1.8V/3.3V outputs eliminate external feedback resistors; adjustable output supports DDR VTT termination; 1.5A per channel handles burst loads during video decode. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Provides power to microcontroller, LIN transceivers, sensor interfaces, and LED drivers in distributed body electronics. IC Role / Device Role / Timing Role: Centralized PMIC replacing discrete LDOs and buck converters; leverages individual EN_/PG_ signals for modular subsystem power management. Use Value: -40°C to +125°C rating ensures operation under hood-mounted conditions; input OV/UVLO protects against battery jump-start transients; 28-pin TQFN fits space-constrained PCB layouts. |
Use Scenario: Powers cellular modem, GNSS receiver, Ethernet PHY, and secure element in 5G-connected vehicle telematics gateway. IC Role / Device Role / Timing Role: High-efficiency quad regulator supplying 1.0V (modem core), 1.8V (GNSS RF), adjustable (VREF for ADC), and 3.3V (Ethernet interface) with low-noise operation. Use Value: Forced-PWM mode prevents frequency shifting during load transients; 2.2MHz switching avoids AM band interference; SYNC input enables system-level clock alignment for deterministic timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-buck PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20029ATIA/V+ | No spread-spectrum; all outputs adjustable; same 1.5A ×4 current rating and 28-pin TQFN package. | Suitable where EMI filtering is handled externally or system-level clock sync is preferred over spectral spreading. | Select when spread-spectrum is unnecessary and full output adjustability is required across all four channels. |
| MAX20029BATIE/V+ | Tri-output variant (3A + 1.5A + 1.5A); different channel current allocation; same spread-spectrum and 256-cycle PG timeout. | Better suited for asymmetric loads like high-current modem + dual low-power peripherals. | Choose when one rail demands >1.5A (e.g., 5G modem core) while others remain ≤1.5A; not pin-compatible due to different EN_/PG_ mapping. |
Compared with MAX20029ATIF/V+, MAX20029ATIA/V+ offers identical quad-1.5A capability but lacks factory-enabled spread-spectrum, while MAX20029BATIE/V+ trades balanced 1.5A channels for a higher-current 3A rail-neither is pin-compatible, requiring PCB redesign for substitution.
Availability
MAX20029ATIF/V+ is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, infotainment systems, and telematics gateways requiring stable component supply, AEC-Q100-compliant sourcing, and long-term production continuity.
Supply support for MAX20029ATIF/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 with precision power, sensing, and connectivity solutions.
The MAX20029 series belongs to Analog Devices' automotive power-management portfolio, designed specifically for demanding point-of-load regulation in safety-critical vehicle systems including ADAS, infotainment, and body electronics.
FAQ
What output voltage configuration does the MAX20029ATIF/V+ provide?
The MAX20029ATIF/V+ has factory-programmed output voltages of 1.0V (OUT1), 1.8V (OUT2), adjustable (OUT3, set via external resistor divider), and 3.3V (OUT4). This configuration is defined in the Selector Guide and cannot be altered post-manufacture. All four channels deliver up to 1.5A, and the adjustable output supports 0.7V to 4.0V range using a standard resistive feedback network referenced to the 1.0V internal VREF.
Does the MAX20029ATIF/V+ support external clock synchronization?
Yes, the MAX20029ATIF/V+ includes a dedicated SYNC pin that accepts an external clock signal between 1.7MHz and 2.5MHz. When driven, the internal oscillator synchronizes to this input, enabling deterministic switching timing across multiple PMICs or with system clocks. If unused, SYNC must be connected to PGND_ to retain the default 2.2MHz operation. The MAX20029ATIF/V+ retains spread-spectrum modulation only when using its internal oscillator.
How is power sequencing managed on the MAX20029ATIF/V+?
The MAX20029ATIF/V+ supports flexible power sequencing through four independent active-high enable inputs (EN1–EN4) and four open-drain power-good outputs (PG1–PG4). Each PG_ asserts high after its respective output reaches regulation and remains asserted for 256 switching cycles post-fault. Sequencing is implemented externally by cascading EN_/PG_ signals - for example, connecting PG1 to EN2 ensures OUT2 enables only after OUT1 is stable.
What thermal design considerations apply to the MAX20029ATIF/V+?
The MAX20029ATIF/V+ uses a 28-pin TQFN-EP package with θJC = 3°C/W. To maintain junction temperature ≤+150°C at full 1.5A load per channel, the exposed pad must be soldered to a large internal GND plane using ≥6 thermal vias (0.3mm diameter, spaced ≤1mm apart). Ambient derating begins above +70°C (28.6mW/°C), and maximum continuous power dissipation is 2285mW on a four-layer JEDEC board.
Is the MAX20029ATIF/V+ qualified for automotive applications?
Yes, the MAX20029ATIF/V+ is specified for -40°C to +125°C operation and built on Analog Devices' automotive-grade process. It incorporates input overvoltage protection (5.8V threshold), undervoltage lockout (2.77V falling), thermal shutdown (+185°C), and cycle-by-cycle current limiting - all essential for AEC-Q100 compliance. While full qualification documentation is maintained by Analog Devices, the device is widely deployed in production automotive ECUs meeting ISO 26262 ASIL-B requirements.
MAX20029ATIF/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)
MAX20029ATIF/V+ FAQ
1.How can I place an order for MAX20029ATIF/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20029ATIF/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 MAX20029ATIF/V+ reliable?
The price and inventory of MAX20029ATIF/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20029ATIF/V+ is usually 5 days.
3.What payment methods are accepted for MAX20029ATIF/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20029ATIF/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20029ATIF/V+?
MAX20029ATIF/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20029ATIF/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 MAX20029ATIF/V+?
For technical support, including MAX20029ATIF/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20029ATIF/V+ requirements.
6.How does Aetrix verify that MAX20029ATIF/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20029ATIF/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 MAX20029ATIF/V+ meets industry standards.
7.What is the process for return or replacement of MAX20029ATIF/V+?
All MAX20029ATIF/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20029ATIF/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 MAX20029ATIF/V+ part is unused and in its original packaging.
Return procedure for MAX20029ATIF/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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