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Analog Devices Inc./Maxim Integrated MAX20029CATIB/V+
- Part No.:
- MAX20029CATIB/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20029CATIB/V+.pdf
- Description:
- IC REG BUCK ADJ 1.5A QUAD 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,494
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Product details
Overview
MAX20029CATIB/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 1.0V, 1.8V, 1.15V, and 1.4V; supports 3.0V–5.5V input, delivers up to 1.5A per channel, operates at 2.2MHz fixed frequency, and features spread-spectrum EMI reduction for ADAS camera modules and infotainment power rails.
For engineers reviewing the MAX20029CATIB/V+ datasheet, MAX20029CATIB/V+ pinout, MAX20029CATIB/V+ application, or MAX20029CATIB/V+ equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal performance in TQFN-28 EP, and real-world automotive sequencing use cases - all extracted from Analog Devices' official MAX20029 family datasheet Rev 17.
Technical Context
The MAX20029CATIB/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 (125mΩ typ) and nMOS (100mΩ typ) switches to sustain >90% efficiency at 1.5A loads across -40°C to +125°C.
Two buck channels (OUT3/OUT4) operate 180° out-of-phase to reduce input ripple and required bulk capacitance; all four channels run in forced-PWM mode outside the AM band and support SYNC input (1.7–2.5MHz) for system-level clock alignment. Spread-spectrum modulation (±3% deviation at 1.5kHz) is factory-enabled on this variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - compatible with automotive battery rail after pre-regulation; supports cold-crank down to 3.0V. |
| Output Voltages | 1.0V, 1.8V, 1.15V, 1.4V - factory-programmed, ±3% accuracy over load/line/temp, eliminating need for precision feedback resistors. |
| Max Output Current | 1.5A per channel - enables single-chip power for multi-rail SoC subsystems (e.g., image sensor + ISP + memory interface). |
| Switching Frequency | 2.2MHz (±10%) - allows full-ceramic design with 1.5µH inductors and reduces EMI filter size by shifting noise above AM band. |
| Thermal Performance | Junction-to-case θJC = 3°C/W - exposed pad enables efficient heat transfer to PCB ground plane; rated for continuous operation at +125°C ambient. |
| Protection Features | Input OVP (5.8V), UVLO (2.77V), cycle-by-cycle current limit, thermal shutdown at +185°C - ensures robustness in harsh automotive environments. |
| EMI Mitigation | Spread-spectrum enabled (±3%), 180° phase shift on OUT3/OUT4, forced-PWM mode - reduces peak radiated emissions by >10dB in 30–1000MHz range. |
Pinout & Package
MAX20029CATIB/V+ is housed in a 28-pin TQFN-EP package (5mm × 5mm × 0.8mm) with exposed thermal pad (EP = GND). The package meets AEC-Q100 Grade 0 qualification and supports reflow per J-STD-020 (260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN4 | Active-high enable inputs | Independent digital control of each buck; 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 10kΩ pull-up to VA (≤VA); timeout set to 256 cycles. |
| OUTS1–OUTS4 | Voltage sense inputs | Connect directly to output capacitors for accurate regulation; factory-trimmed reference (1.0V) enables ±3% VOUT accuracy. |
| LX1–LX4 | Switching node terminals | High-impedance when off; drive external inductors; LX3/LX4 are 180° out-of-phase to minimize 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 locally. |
| PGND1–PGND4 | Channel-specific power grounds | Separate ground returns prevent cross-talk between high-current paths; must be connected to main GND via low-inductance routes. |
| SYNC | External clock synchronization input | Accepts 1.7–2.5MHz CMOS signal; connects to PGND if unused; overrides internal 2.2MHz oscillator. |
| VA | Analog supply voltage | Provides bias for internal references and comparators; requires ≥1µF ceramic cap to GND; tied to PV_ supplies in typical layout. |
Key Features
| Feature | Design Value |
|---|---|
| Quad synchronous buck with integrated FETs | Eliminates 8 external MOSFETs and associated gate drivers; reduces BOM count and layout area by >40% vs discrete solution. |
| Factory-programmed output voltages | 1.0V/1.8V/1.15V/1.4V set at wafer level - removes need for external resistor dividers and associated placement/tolerance errors. |
| 180° phase interleaving on OUT3/OUT4 | Cuts RMS input ripple current by ~30%, allowing smaller input capacitors (e.g., single 4.7µF instead of dual 10µF ceramics). |
| Soft-start with programmable PG timeout | Fixed 256-cycle timeout ensures controlled ramp-up of all four rails; prevents inrush-induced brownout in multi-load systems. |
| Hybrid load-line architecture | Reduces required output capacitance by 25–30% while maintaining <±1.5% transient deviation under 1A step load (4µs response). |
Applications
| ADAS Camera Power Management | Automotive Infotainment SoC Rails |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and DDR memory interface in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Quad-buck PMIC delivering tightly regulated 1.0V (core), 1.8V (I/O), 1.15V (analog), and 1.4V (memory) simultaneously. Use Value: Phase interleaving and spread-spectrum reduce EMI coupling into analog video signals; 125°C operation ensures reliability behind vehicle bumper. |
Use Scenario: Supplies multiple voltage domains for multimedia SoCs (e.g., NXP i.MX8, Renesas R-Car) in head units and digital clusters. IC Role / Device Role / Timing Role: Centralized power controller managing sequencing, PG signaling, and dynamic load response across CPU, GPU, and display interfaces. Use Value: Individual EN/PG pins enable precise power-up order (e.g., DDR before core); 2.2MHz switching avoids interference with audio PLLs. |
| Automotive Telematics Control Unit | Body Control Module Subsystem |
|
Use Scenario: Powers LTE modem, GNSS receiver, and CAN FD transceiver in telematics control units (TCUs) requiring low quiescent current and high EMI immunity. IC Role / Device Role / Timing Role: Primary DC-DC source converting 5V pre-regulated rail to 1.8V (modem core), 1.15V (GNSS LNA), 1.4V (CAN FD PHY), and 1.0V (secure element). Use Value: Forced-PWM mode eliminates frequency jitter in RF-sensitive bands; spread-spectrum option suppresses narrowband emissions near cellular frequencies. |
Use Scenario: Supplies microcontroller, LIN transceivers, and LED drivers in body control modules where space and thermal constraints are critical. IC Role / Device Role / Timing Role: Compact, thermally efficient quad-buck replacing discrete regulators and linear post-regulators in confined under-dash locations. Use Value: Exposed pad + 3°C/W θJC enables 1.5A/channel operation without heatsink; -40°C to +125°C rating matches BCM under-hood thermal profile. |
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+ | Same 28-pin TQFN package and 1.5A/channel rating, but all four outputs adjustable (1V–4V) via external resistors; no factory-set voltages. | Suitable for designs requiring flexible voltage tuning across prototypes or variants; lacks the fixed 1.0V/1.8V/1.15V/1.4V configuration of MAX20029CATIB/V+. | Select when board-level voltage customization is needed; avoid if production BOM simplicity and guaranteed accuracy are priorities. |
| TPS65917B1RSLR | TI's 7-channel PMIC in 48-pin VQFN; offers LDOs, RTC, and charger alongside 4 buck converters; higher integration but larger footprint and different sequencing logic. | Better suited for full-featured infotainment platforms needing battery charging and real-time clock; over-integrated for dedicated camera or TCU use. | Choose for complex multi-rail systems requiring mixed power + management functions; not drop-in due to pin count, size, and control interface differences. |
Compared with MAX20029ATIA/V+, MAX20029CATIB/V+ trades adjustability for guaranteed factory-set accuracy and reduced external component count; versus TPS65917B1RSLR, it offers smaller size, lower cost, and simpler sequencing - ideal for focused quad-rail automotive subsystems.
Availability
MAX20029CATIB/V+ is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC power delivery, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MAX20029CATIB/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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, and communications markets since 1965.
The MAX20029 family is part of Analog Devices' automotive power management portfolio, designed specifically for compact, EMI-robust point-of-load regulation in safety-critical ADAS and infotainment systems operating across extended temperature ranges.
FAQ
What is the output voltage configuration of the MAX20029CATIB/V+?
The MAX20029CATIB/V+ has factory-programmed output voltages of 1.0V (OUT1), 1.8V (OUT2), 1.15V (OUT3), and 1.4V (OUT4), with ±3% accuracy over load, line, and temperature. These values are laser-trimmed during wafer test and require no external resistors - unlike adjustable variants such as MAX20029ATIA/V+. The MAX20029CATIB/V+ uses internal reference trimming to achieve this accuracy without 0.1% external components.
Does the MAX20029CATIB/V+ support synchronization to an external clock?
Yes, the MAX20029CATIB/V+ features a dedicated SYNC pin that accepts an external clock signal between 1.7MHz and 2.5MHz. When driven, it overrides the internal 2.2MHz oscillator and locks all four buck converters to the external frequency. If unused, SYNC must be connected to PGND. This capability enables deterministic timing alignment in multi-PMIC systems or noise-sensitive applications like radar and camera interfaces - a key feature of the MAX20029CATIB/V+ design.
How does the MAX20029CATIB/V+ manage electromagnetic interference (EMI)?
The MAX20029CATIB/V+ integrates three EMI-reduction techniques: (1) 180° phase interleaving between OUT3 and OUT4 to cancel input ripple current, (2) factory-enabled spread-spectrum modulation (±3% frequency deviation at 1.5kHz), and (3) forced-PWM operation outside the AM band (300kHz–3MHz). These features collectively lower peak radiated emissions by >10dB in automotive EMC testing - a verified characteristic of the MAX20029CATIB/V+ variant per Analog Devices' application notes.
What thermal performance can be expected from the MAX20029CATIB/V+ in a standard 4-layer PCB?
On a standard 4-layer PCB with 2oz copper and proper thermal vias under the exposed pad, the MAX20029CATIB/V+ achieves a junction-to-ambient thermal resistance (θJA) of 35°C/W. With its 3°C/W junction-to-case (θJC) rating, this allows continuous 1.5A operation per channel at +125°C ambient - validated in Analog Devices' thermal characterization reports. The MAX20029CATIB/V+'s TQFN-EP package relies on the exposed pad soldered to a large GND plane for optimal heat dissipation.
Can the MAX20029CATIB/V+ be used in non-automotive applications?
While qualified per AEC-Q100 Grade 0 (-40°C to +125°C) and optimized for automotive EMI requirements, the MAX20029CATIB/V+ is functionally suitable for industrial or medical applications demanding high reliability, wide temperature operation, and low-noise power conversion. Its 2.2MHz switching, integrated FETs, and factory-set outputs provide advantages in space-constrained, thermally demanding environments - though users should verify regulatory compliance (e.g., IEC 60601) separately, as the MAX20029CATIB/V+ is not certified for medical use out-of-box.
MAX20029CATIB/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)
MAX20029CATIB/V+ FAQ
1.How can I place an order for MAX20029CATIB/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20029CATIB/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 MAX20029CATIB/V+ reliable?
The price and inventory of MAX20029CATIB/V+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX20029CATIB/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20029CATIB/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20029CATIB/V+?
MAX20029CATIB/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20029CATIB/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 MAX20029CATIB/V+?
For technical support, including MAX20029CATIB/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20029CATIB/V+ requirements.
6.How does Aetrix verify that MAX20029CATIB/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20029CATIB/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 MAX20029CATIB/V+ meets industry standards.
7.What is the process for return or replacement of MAX20029CATIB/V+?
All MAX20029CATIB/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20029CATIB/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 MAX20029CATIB/V+ part is unused and in its original packaging.
Return procedure for MAX20029CATIB/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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