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Analog Devices Inc./Maxim Integrated MAX20029CATIB/V+T
- Part No.:
- MAX20029CATIB/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20029CATIB/V+T.pdf
- Description:
- IC REG BUCK ADJ 1.5A QUAD 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,326
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Product details
Overview
MAX20029CATIB/V+T 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, 1.15V, 1.4V), 2.2MHz fixed-frequency PWM operation, ±3% output voltage accuracy over load/line/temperature, and 1.5A per channel current capability. It operates from 3.0V to 5.5V input and delivers stable power for ADAS domain controllers and infotainment SoCs.
For engineers reviewing the MAX20029CATIB/V+T datasheet, MAX20029CATIB/V+T pinout, MAX20029CATIB/V+T application, or MAX20029CATIB/V+T equivalent, key selection considerations include its 28-pin TQFN-EP package, 180° phase interleaving between OUT3/OUT4, spread-spectrum EMI reduction, individual enable/PG outputs, and -40°C to +125°C automotive qualification.
Technical Context
The MAX20029CATIB/V+T 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, 4µs recovery).
It features factory-programmed output voltages (1.0V, 1.8V, 1.15V, 1.4V), 180° out-of-phase switching on OUT3/OUT4 to minimize input ripple, and a SYNC input supporting 1.7–2.5MHz external clock synchronization. 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 5V rail or post-regulated supplies without external LDO pre-regulation. |
| Output Voltage Setpoints | 1.0V, 1.8V, 1.15V, 1.4V - factory-programmed, enabling precise SoC core/I/O voltage sequencing without external resistive dividers. |
| Max Output Current | 1.5A per channel - sufficient for powering multiple low-voltage rails in automotive microcontrollers and sensors. |
| Switching Frequency | 2.2MHz (±10%) - enables all-ceramic capacitor design and compact 1.5µH inductors, reducing board area and BOM cost. |
| Output Accuracy | ±3% over load, line, and temperature - ensures reliable regulation across automotive ambient extremes (-40°C to +125°C). |
| EMI Reduction Features | Spread-spectrum (+3% Δf) and 180° phase interleaving on OUT3/OUT4 - lowers peak radiated emissions without requiring shielding or ferrites. |
| Thermal Protection | +185°C junction shutdown with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
MAX20029CATIB/V+T is housed in a 28-pin, 5mm × 5mm × 0.8mm TQFN-EP package with exposed thermal pad (EP = GND). The package supports high-power dissipation (θJA = 35°C/W, θJC = 3°C/W) and requires soldering the EP pad to a large internal ground plane via thermal vias for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN4 | Active-high digital enable inputs | Independent control of each buck converter; allows flexible power sequencing and dynamic rail enable/disable. |
| PG1–PG4 | Open-drain power-good outputs | Assert low if output deviates >6% below or >10% above nominal; used for system-level fault detection and reset coordination. |
| OUTS1–OUTS4 | Voltage sense inputs | Connect directly to output capacitors for accurate feedback; factory-trimmed for 1.0V reference, enabling ±3% accuracy without precision resistors. |
| LX1–LX4 | Switching node terminals | High-impedance when disabled; require low-inductance layout to PV_ and PGND_ pins to minimize switching losses and EMI. |
| PV1–PV4 | Input voltage supply pins | Each powers one buck stage; require local 2.2µF ceramic bypass capacitors placed adjacent to respective PV_/PGND pair. |
| PGND1–PGND4 | Power ground returns | Separate ground paths per buck stage reduce cross-talk and improve transient response; must be tied to main GND at single point. |
| SYNC | External clock synchronization input | Accepts 1.7–2.5MHz clock to align switching frequency with system timing; connect to PGND_ to use internal 2.2MHz oscillator. |
| VA | Analog supply voltage | Powers internal reference and control circuitry; requires 1µF ceramic capacitor to GND and must be connected to same supply as PV_ inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Quad synchronous buck converters | Four integrated FET stages eliminate need for external MOSFETs, drivers, and gate resistors-reducing solution size by >40% vs discrete designs. |
| Factory-programmed output voltages | Fixed 1.0V, 1.8V, 1.15V, 1.4V outputs achieve ±3% accuracy without external feedback resistors-cutting BOM cost and layout complexity. |
| 180° phase interleaving (OUT3/OUT4) | Halves effective input ripple current, reducing required input capacitance and easing EMI filter design for automotive CISPR-25 compliance. |
| Spread-spectrum modulation | Linear ±3% frequency dither at 1.5kHz spreads spectral energy, lowering peak radiated emissions by up to 10dB in critical AM band (0.53–1.8MHz). |
| Individual soft-start and PG timing | Configurable 256-cycle PG timeout enables precise power-rail sequencing for multi-core SoCs without external timers or FPGA logic. |
| Integrated protection suite | Cycle-by-cycle current limiting, input OV/UVLO, and thermal shutdown provide autonomous fault handling-eliminating need for external supervisors. |
Applications
| ADAS Camera Module Power | Automotive Infotainment SoC |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and interface logic in rear-view or surround-view camera modules operating in under-hood environments. IC Role / Device Role / Timing Role: Quad PMIC delivering 1.15V (ISP core), 1.4V (sensor I/O), 1.0V (MIPI PHY), and 1.8V (DDR I/O) with synchronized startup and independent fault reporting. Use Value: Factory-set voltages ensure correct SoC boot sequence; 180° phase interleaving minimizes conducted noise coupling into analog video signals. |
Use Scenario: Supplies multiple voltage domains for quad-core ARM-based infotainment processors with GPU, audio DSP, and display interfaces. IC Role / Device Role / Timing Role: Centralized power controller providing 1.0V (CPU core), 1.8V (DDR3L), 1.15V (GPU), and 1.4V (PCIe I/O) with individual EN/PG signaling for safe state transitions. Use Value: Spread-spectrum mode suppresses switching noise in sensitive audio bands; SYNC input allows alignment with display refresh timing to avoid beat frequencies. |
| Automotive Telematics Control Unit | Body Control Module Microcontroller |
|
Use Scenario: Powers LTE modem, GNSS receiver, MCU, and CAN transceivers in cellular-connected telematics units mounted in vehicle dashboards. IC Role / Device Role / Timing Role: Single-chip solution generating 1.8V (modem RF), 1.4V (GNSS baseband), 1.0V (ARM Cortex-M7), and 1.15V (CAN FD PHY) with ESD-hardened I/O. Use Value: -40°C to +125°C rating ensures reliability in non-ventilated enclosures; input OV protection guards against jump-start transients up to 6V. |
Use Scenario: Supplies 16-bit automotive MCU, LIN transceiver, EEPROM, and LED drivers in door module or seat control units. IC Role / Device Role / Timing Role: Low-quiescent PMIC delivering 1.0V (MCU core), 1.8V (LIN PHY), 1.15V (EEPROM VCC), and 1.4V (LED driver bias) with ultra-low shutdown current (<2µA). Use Value: 2.2MHz operation enables tiny 1.5µH inductors and 2.2µF input caps-fitting tight space constraints behind interior trim panels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-buck PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20029BATIC/V+ | Offers 3A combined channel (CH1+CH2) instead of four 1.5A channels; fixed 1.1V/1.8V/1.0V/1.0V outputs; no spread-spectrum option. | Better suited for systems needing one high-current rail (e.g., radar SoC core) plus three auxiliary rails; lacks EMI-reduction features for noise-sensitive zones. | Select MAX20029BATIC/V+ only if 3A capability is required and spread-spectrum is unnecessary; not drop-in compatible due to different output programming and PG timeout (256 vs 20,480 cycles). |
| TPS653221A-Q1 | Triple buck (3A/2A/2A) + LDO; 2.2MHz switching; AEC-Q100 Grade 1; no phase interleaving or spread-spectrum; different pinout and enable logic. | Targeted at safety-critical ASIL-B systems with integrated watchdog and fault reporting; lacks fourth buck channel and advanced EMI features. | Choose TPS653221A-Q1 for ISO 26262-compliant applications requiring functional safety diagnostics; MAX20029CATIB/V+T provides superior EMI performance and rail count for non-ASIL designs. |
Compared with MAX20029BATIC/V+, MAX20029CATIB/V+T delivers balanced 1.5A per rail with factory-set precision and EMI mitigation, whereas TPS653221A-Q1 trades rail count for safety features-making MAX20029CATIB/V+T optimal for cost-sensitive, high-density ADAS modules where EMI headroom is constrained.
Availability
MAX20029CATIB/V+T is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC power delivery, telematics control units, and body control module microcontrollers requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX20029CATIB/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 robust, qualified components.
The MAX20029 family is part of Analog Devices' automotive power solutions portfolio, designed specifically for demanding point-of-load regulation in ADAS, infotainment, and telematics systems requiring AEC-Q100 Grade 0/1 qualification and low EMI.
FAQ
What output voltages are factory-programmed in the MAX20029CATIB/V+T?
The MAX20029CATIB/V+T has four factory-programmed output voltages: 1.0V (OUT1), 1.8V (OUT2), 1.15V (OUT3), and 1.4V (OUT4). These values are laser-trimmed during manufacturing to achieve ±3% accuracy without external resistive feedback networks, simplifying layout and reducing BOM cost. The MAX20029CATIB/V+T does not support resistor-adjustable outputs.
Does the MAX20029CATIB/V+T support external clock synchronization?
Yes, the MAX20029CATIB/V+T supports external clock synchronization via its SYNC pin, which accepts input frequencies from 1.7MHz to 2.5MHz. When driven by an external clock, the internal oscillator locks to that frequency, enabling deterministic timing alignment with system clocks such as display or audio master clocks. If unused, SYNC must be tied to PGND_ to retain the default 2.2MHz operation.
How does the MAX20029CATIB/V+T reduce electromagnetic interference?
The MAX20029CATIB/V+T reduces EMI through two integrated techniques: (1) 180° phase interleaving between OUT3 and OUT4, which cancels input ripple current and cuts required input capacitance; and (2) linear spread-spectrum modulation (±3% frequency dither at 1.5kHz), which smears spectral energy and lowers peak radiated emissions-particularly effective in the AM radio band (0.53–1.8MHz).
What protection features are included in the MAX20029CATIB/V+T?
The MAX20029CATIB/V+T integrates input overvoltage protection (trips at 5.8V), input undervoltage lockout (2.77V falling), cycle-by-cycle current limiting per channel, and thermal shutdown at +185°C (with 15°C hysteresis). All four buck regulators also feature independent power-good outputs with configurable timeout (256 cycles), enabling robust system-level fault detection and safe power sequencing.
Is the MAX20029CATIB/V+T qualified for automotive applications?
Yes, the MAX20029CATIB/V+T is AEC-Q100 qualified for automotive applications and specified for operation over the full -40°C to +125°C junction temperature range. Its 28-pin TQFN-EP package, integrated protection features, and EMI-reduction capabilities meet stringent requirements for deployment in ADAS cameras, infotainment head units, and telematics control units within modern vehicles.
MAX20029CATIB/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)
MAX20029CATIB/V+T FAQ
1.How can I place an order for MAX20029CATIB/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20029CATIB/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 MAX20029CATIB/V+T reliable?
The price and inventory of MAX20029CATIB/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 MAX20029CATIB/V+T is usually 5 days.
3.What payment methods are accepted for MAX20029CATIB/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20029CATIB/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20029CATIB/V+T?
MAX20029CATIB/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20029CATIB/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 MAX20029CATIB/V+T?
For technical support, including MAX20029CATIB/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20029CATIB/V+T requirements.
6.How does Aetrix verify that MAX20029CATIB/V+T is sourced from the original manufacturer or authorized distributors?
All MAX20029CATIB/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 MAX20029CATIB/V+T meets industry standards.
7.What is the process for return or replacement of MAX20029CATIB/V+T?
All MAX20029CATIB/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20029CATIB/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 MAX20029CATIB/V+T part is unused and in its original packaging.
Return procedure for MAX20029CATIB/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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