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Analog Devices Inc./Maxim Integrated MAX20057ATIB/VY+
- Part No.:
- MAX20057ATIB/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20057ATIB/VY+.pdf
- Description:
- IC REG BOOST ADJ 3.5A DL 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,320
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Product details
Overview
MAX20057ATIB/VY+ from Analog Devices is an automotive-grade triple-output power management IC integrating two synchronous buck converters (5V/3.5A and 3.3V/2A) and a 36V asynchronous boost controller, operating from 3.5V–36V input and supporting cold-crank down to 2V battery voltage. It delivers regulated outputs for instrument clusters and start-stop systems with 2.1MHz/400kHz selectable switching, 180° out-of-phase buck operation, and spread-spectrum EMI reduction.
For engineers reviewing the MAX20057ATIB/VY+ datasheet, MAX20057ATIB/VY+ pinout, MAX20057ATIB/VY+ application, or MAX20057ATIB/VY+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive thermal and protection specs, and real-world selection guidance for crank-ready PMIC design.
Technical Context
The MAX20057ATIB/VY+ implements valley-current-mode control for both buck converters, enabling stable regulation at high input-to-output voltage ratios and fast transient response. Its dual-buck architecture operates 180° out-of-phase to minimize input ripple across the full 3.5V–36V range, while the boost controller uses current-mode control with 50mV current-sense threshold and programmable soft-start (1ms).
FSYNC enables three operational modes: forced PWM (fixed-frequency), skip mode (ultra-low quiescent current), and PLL-synchronized external clock locking. Spread-spectrum modulation (±6% frequency dithering) is factory-enabled and active only in free-running mode - disabled during FSYNC synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V continuous; supports cold-crank operation down to 2.05V input via UVLO disable |
| Buck1 Output | Fixed 5V ±1% (PWM mode), 3.5A max continuous output current |
| Buck2 Output | Fixed 3.3V ±1% (PWM mode), 2A max continuous output current |
| Boost Output | Fixed 10V ±0.25V, 36V max input, supports pre-boost for buck regulation during cranking |
| Switching Frequency | Factory-set 2.1MHz (±10%) or 400kHz; FSYNC programmable for PLL sync or skip/FPWM mode selection |
| Quiescent Current | 30μA typical with all regulators enabled; 1μA in full shutdown |
| Thermal Protection | Thermal shutdown at 170°C (±5°C), 20°C hysteresis; θJA = 27°C/W on 4-layer board |
Pinout & Package
MAX20057ATIB/VY+ is housed in a thermally enhanced 5mm × 5mm, 28-pin TQFN-EP package (package code T2855Y+5C) with exposed pad connected to AGND for optimal heat dissipation (θJC = 3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2, EN3 | Digital enable inputs | High-voltage tolerant (to 40V), independent control of Buck1, Buck2, and Boost; enable sequencing and timeout safety |
| FB1, FB2, FB3 | Feedback inputs | Regulated to 1.0V ±1.5%; support fixed-output (via BIAS tie) or adjustable 1V–14V (via resistor divider) |
| LX1, LX2 | Power switch nodes | Connect to buck inductors; support 95% max duty cycle and 20ns min on-time for 2.1MHz operation |
| PGOOD1, PGOOD2 | Open-drain status indicators | Assert low when output drops below 93.5% of nominal; high-impedance above 95%; debounced (20μs) |
| FSYNC | External clock interface | Accepts 250kHz–2.6MHz sync signal; controls mode (skip/FPWM) and phase alignment (180° between bucks) |
| DL | N-MOSFET gate driver output | Drives external boost MOSFET gate; 1.67A peak sink/source; powered by BIAS or EXTVCC |
| BIAS, EXTVCC | Internal LDO and switchover supply | 5V internal LDO (bypass ≥2.2μF); EXTVCC bypasses LDO when 3.25V–5.5V applied, reducing dissipation |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase buck operation | Reduces input capacitor RMS current by up to 30%, enabling smaller bulk capacitance in space-constrained automotive modules |
| 20ns minimum on-time (buck) | Enables stable 3.3V output at 2.1MHz with 3.5V–36V input without pulse-skipping artifacts or regulation loss |
| Spread-spectrum modulation (±6%) | Reduces peak EMI amplitude by >10dB in AM band (530–1710kHz), eliminating need for additional shielding or filtering |
| Cycle-by-cycle overcurrent + hiccup mode | Protects against sustained short-circuit on any rail; auto-restarts after 10ms cooldown, preventing thermal runaway |
| EXTVCC switchover | Eliminates internal LDO power loss when using 3.3V/5V buck output as bias supply, improving light-load efficiency by up to 8% |
Applications
| Automotive Start-Stop System | Instrument Cluster |
|---|---|
Use Scenario: Powering microcontroller, display, and CAN transceivers during engine restart where battery voltage dips to 2.05V. IC Role / Device Role / Timing Role: Triple-output PMIC providing isolated, sequenced 5V, 3.3V, and 10V rails with cold-crank resilience and PGOOD sequencing. Use Value: Maintains full system functionality through cranking events without brownout or reset, verified over -40°C to +125°C. |
Use Scenario: Supplying TFT-LCD backlight drivers, graphics processor, and touch controller in digital dashboards. IC Role / Device Role / Timing Role: High-efficiency buck-boost power source delivering low-noise 5V/3.3V with EMI suppression critical for analog sensor interfaces. Use Value: 2.1MHz operation minimizes inductor size (<1.5mm height), while spread spectrum avoids interference with AM/FM radio reception. |
| Navigation and Radio Head Units | Distributed DC Power Systems |
Use Scenario: Supporting multi-rail SoC (e.g., NXP i.MX8) and audio codecs in infotainment head units with strict EMC requirements. IC Role / Device Role / Timing Role: Primary power controller managing buck regulation, boost-assisted hold-up, and precise power-good signaling for firmware boot integrity. Use Value: FSYNC synchronization eliminates beat frequencies with other system clocks, ensuring clean audio output and deterministic boot timing. |
Use Scenario: Centralized power node supplying multiple ECUs (e.g., ADAS camera, radar, gateway) from 12V battery with wide VIN tolerance. IC Role / Device Role / Timing Role: High-density PMIC delivering scalable 5V/3.3V/10V outputs with thermal-aware load shedding and undervoltage lockout per rail. Use Value: Thermally enhanced TQFN-EP package sustains 3.5A buck1 load at +125°C ambient without derating, validated for 95,000h lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive triple-output PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20090ATPA/VY+ | Single 5V/3A buck + dual 3.3V/2A bucks; no boost controller; 2.2MHz fixed frequency only | Suitable for non-cranking applications requiring only buck regulation; lacks cold-crank support and pre-boost capability | Select when boost functionality is unnecessary and board space permits larger inductors for lower-frequency operation |
| TPS653221AQPWPRQ1 | Triple buck (3.3V/2A, 5V/3A, 1.2V/2A); no boost; integrated watchdog and reset logic; 2.1MHz max | Targets ASIL-B functional safety systems; includes diagnostic registers and fault reporting not present in MAX20057ATIB/VY+ | Choose when ISO 26262 compliance and embedded diagnostics are required, not for crank-ready boost-dependent designs |
Compared with MAX20057ATIB/VY+, MAX20090ATPA/VY+ reduces integration by omitting the boost controller and cold-crank support, while TPS653221AQPWPRQ1 adds safety features but removes the critical pre-boost function needed for automotive cranking resilience - making MAX20057ATIB/VY+ uniquely suited for crank-ready distributed power architectures.
Availability
MAX20057ATIB/VY+ is available at Aetrix Electronics and suitable for automotive start-stop systems, instrument clusters, navigation head units, and distributed DC power systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX20057ATIB/VY+ 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, communications, and healthcare markets since 1965.
The MAX20057ATIB/VY+ belongs to Analog Devices' automotive power management IC portfolio, engineered specifically for crank-ready, EMI-conscious, thermally robust power delivery in start-stop and infotainment systems.
FAQ
What is the cold-crank input voltage limit supported by the MAX20057ATIB/VY+?
The MAX20057ATIB/VY+ supports cold-crank operation down to 2.05V input voltage when the boost controller's UVLO falling threshold is disabled. This allows the buck converters to remain in regulation during severe battery sag, a key requirement for automotive start-stop systems. The device maintains 5V and 3.3V output stability throughout this condition using the 10V boost rail as pre-boost supply. Verified per datasheet Section "Undervoltage Lockout" and Absolute Maximum Ratings table.
Does the MAX20057ATIB/VY+ support external frequency synchronization, and what are the valid FSYNC input ranges?
Yes, the MAX20057ATIB/VY+ supports external frequency synchronization via the FSYNC pin. For 2.1MHz internal operation, FSYNC accepts 1.8MHz–2.6MHz signals with ≥100ns pulse width; for 400kHz operation, it accepts 250kHz–550kHz signals with ≥1.5μs pulse width. The PLL locks buck and boost switching edges to the FSYNC rising/falling edges, enabling precise phase alignment and EMI reduction in multi-PMIC systems. Confirmed in Electrical Characteristics Table and Detailed Description section.
What is the purpose of the EXTVCC pin on the MAX20057ATIB/VY+, and how does it affect efficiency?
The EXTVCC pin on the MAX20057ATIB/VY+ allows bypassing the internal 5V BIAS LDO by applying an external 3.25V–5.5V supply - such as one of the buck outputs - thereby eliminating LDO conduction losses. This improves light-load efficiency by up to 8% and reduces die temperature. When VEXTVCC drops below ~3V, the IC automatically switches back to the internal LDO. This switchover behavior is fully specified in the Electrical Characteristics table under "EXTVCC Threshold" and "Internal BIAS Voltage".
How does the MAX20057ATIB/VY+ implement overcurrent protection across its three power channels?
The MAX20057ATIB/VY+ uses cycle-by-cycle current limiting on all three channels (Buck1, Buck2, Boost), with hiccup-mode recovery for sustained faults. When output voltage drops below 0.7V due to overload, the affected channel shuts off for ~10ms before restarting. Each channel has independent sensing: Buck1/Buck2 use internal high-side MOSFET RDS(on) sensing, while Boost uses external CSP resistor with 50mV trip threshold. These mechanisms are detailed in the "Overcurrent Protection" section and Electrical Characteristics table.
Can the MAX20057ATIB/VY+ be used without the boost controller, and what happens to its quiescent current?
Yes, the MAX20057ATIB/VY+ can operate with the boost controller disabled (EN3 = low), while Buck1 and Buck2 remain fully functional. In this configuration, total supply current is 30μA typical with both bucks enabled, and drops to 1μA when all three EN pins are low. This ultra-low shutdown current enables always-on monitoring circuits in automotive body control modules. Values are measured per Electrical Characteristics table under "Supply Current" with VEN_ conditions specified.
MAX20057ATIB/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 14V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 28-TQFN (5x5)
MAX20057ATIB/VY+ FAQ
1.How can I place an order for MAX20057ATIB/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20057ATIB/VY+ 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 MAX20057ATIB/VY+ reliable?
The price and inventory of MAX20057ATIB/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20057ATIB/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20057ATIB/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20057ATIB/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20057ATIB/VY+?
MAX20057ATIB/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20057ATIB/VY+ 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 MAX20057ATIB/VY+?
For technical support, including MAX20057ATIB/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20057ATIB/VY+ requirements.
6.How does Aetrix verify that MAX20057ATIB/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20057ATIB/VY+ 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 MAX20057ATIB/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20057ATIB/VY+?
All MAX20057ATIB/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20057ATIB/VY+, 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 MAX20057ATIB/VY+ part is unused and in its original packaging.
Return procedure for MAX20057ATIB/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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