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Analog Devices Inc./Maxim Integrated MAX20057ATI/VY+T
- Part No.:
- MAX20057ATI/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20057ATI/VY+T.pdf
- Description:
- IC REG BOOST ADJ 3.5A DL 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,088
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Product details
Overview
MAX20057ATI/VY+T 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 with cold-crank support down to 2V battery voltage. It delivers regulated power for instrument clusters, start-stop systems, and head units under wide temperature (-40°C to +125°C) and transient conditions.
For engineers reviewing the MAX20057ATI/VY+T datasheet, MAX20057ATI/VY+T pinout, MAX20057ATI/VY+T application, or MAX20057ATI/VY+T equivalent, key selection criteria include its 2.1MHz/400kHz selectable switching frequency, 180° out-of-phase buck operation, spread-spectrum EMI reduction, FSYNC synchronization capability, and thermally enhanced 5mm × 5mm TQFN-EP package with exposed pad.
Technical Context
The MAX20057ATI/VY+T implements valley current-mode control for both buck converters, enabling stable regulation at high input-to-output voltage ratios and supporting forced PWM, skip, and external clock-synchronized modes via FSYNC. Its dual-buck architecture operates 180° out-of-phase to minimize input ripple across 3.5V–36V supply range.
The integrated boost controller features cycle-by-cycle current limiting with 50mV CSP threshold, UVLO with 4.5V rising/2.05V falling thresholds, and supports preboost during cold-crank to maintain buck regulation. Internal 5V BIAS LDO and EXTVCC switchover enable flexible biasing with <30μA total quiescent current when all regulators are active.
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 boost pre-regulation |
| Buck1 Output | Fixed 5V ±1% or adjustable 1V–14V; 3.5A continuous output with 95% max duty cycle |
| Buck2 Output | Fixed 3.3V ±1% or adjustable 1V–14V; 2A continuous output with 180° phase shift vs Buck1 |
| Boost Output | Fixed 10V ±0.25V or adjustable; 36V capable with external N-MOSFET and DL gate driver |
| Switching Frequency | Selectable 400kHz or 2.1MHz; ±6% spread spectrum option reduces EMI without layout changes |
| Quiescent Current | 30μA typical with all regulators enabled; 1μA in full shutdown mode |
| Thermal Range | -40°C to +125°C ambient; thermal shutdown at +170°C with 20°C hysteresis |
Pinout & Package
MAX20057ATI/VY+T uses a thermally enhanced 5mm × 5mm, 28-pin TQFN-EP package (package code T2855Y+5C) with exposed pad connected to AGND for optimal heat dissipation. Junction-to-ambient thermal resistance is 27°C/W on a four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2, EN3 | Independent digital enable inputs | High-voltage tolerant (to 40V); control startup sequencing of Buck1, Buck2, and Boost independently |
| FB1, FB2, FB3 | Feedback inputs | Regulated to 1.0V ±1.5%; support fixed outputs (via BIAS tie) or resistor-divider adjustment (1V–14V) |
| LX1, LX2 | Power switch node connections | Drive external inductors; require low-ESR ceramic bootstrap capacitors (BST1/BST2) for high-side gate drive |
| PGOOD1, PGOOD2 | Open-drain power-good indicators | Assert low if output drops below 93.5% of nominal; high-impedance above 95%; used for rail sequencing and fault signaling |
| FSYNC | External clock synchronization input | Accepts 250kHz–2.6MHz signal; enables PLL-based synchronization and 180° phase alignment between bucks |
| DL | N-MOSFET low-side gate driver output | Sources/sinks up to 1.67A peak; drives external boost MOSFET with internal 5V BIAS or EXTVCC supply |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase buck operation | Reduces input capacitor RMS current by ~30%, enabling smaller bulk capacitance and lower EMI |
| 20ns minimum on-time (buck) | Enables stable 3.3V output at 2.1MHz without pulse-skipping artifacts or audible noise |
| Spread-spectrum modulation | ±6% frequency dither centered at fSW; lowers peak EMI by >10dB without compromising regulation |
| EXTVCC switchover | Bypasses internal 5V LDO using external 3.25V–5.5V supply; cuts IC power loss and improves light-load efficiency |
| Cycle-by-cycle overcurrent protection | 50mV CSP threshold minimizes sense resistor power loss; hiccup mode prevents thermal runaway during short circuits |
Applications
| Instrument Cluster Power | Start-Stop System Supply |
|---|---|
Use Scenario: Powering LCD display, microcontroller, CAN transceiver, and backlight drivers in vehicle dashboards under stop-start cycling and load-dump transients. IC Role / Device Role / Timing Role: Primary PMIC delivering tightly regulated 5V and 3.3V rails while maintaining regulation during 2V cold-crank events via integrated boost pre-regulation. Use Value: Eliminates need for external preboost stage; ensures uninterrupted MCU operation and display functionality during engine restart. | Use Scenario: Providing stable 5V/3.3V to engine control unit (ECU) peripherals and sensors during repeated engine stop/start cycles with battery voltage sag to 2.05V. IC Role / Device Role / Timing Role: Triple-output regulator with independent EN control enabling precise power sequencing and fast wake-up from ultra-low-quiescent standby (<1μA). Use Value: Guarantees system-level reliability during 10,000+ stop-start cycles; meets OEM cold-crank specification without external supervision. |
| Navigation Head Unit | Distributed DC Power System |
Use Scenario: Supplying processor core, memory, GPS module, and audio codec in infotainment head units exposed to AM-band EMI-sensitive environments. IC Role / Device Role / Timing Role: High-frequency (2.1MHz) PMIC with spread-spectrum and FSYNC synchronization to avoid AM radio interference while minimizing filter component size. Use Value: Enables compact 4-layer PCB design with no AM band harmonics; passes CISPR-25 Class 5 radiated emissions without shielding. | Use Scenario: Centralized power hub for ADAS camera modules, radar processors, and domain controllers requiring isolated, sequenced, and monitored 5V/3.3V/10V rails. IC Role / Device Role / Timing Role: Integrated triple-output PMIC with PGOOD signaling, thermal shutdown, and undervoltage lockout per rail for autonomous system-level fault containment. Use Value: Reduces bill-of-materials by consolidating three discrete regulators; simplifies functional safety diagnostics via dedicated rail status flags. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20090ATI/VY+ | Single 5V/3.5A buck + boost; lacks second buck channel and 180° phase control | Suitable for simpler loads where only one regulated rail is required | Select MAX20090ATI/VY+ when system needs only one high-current buck output plus boost pre-regulation |
| TPS65321A-Q1 | Triple buck (3A/2A/1.5A) but no integrated boost; requires external preboost circuit for cold-crank | Requires additional external components to achieve 2V cold-crank operation | Select TPS65321A-Q1 when boost is unnecessary or implemented separately with higher efficiency trade-offs |
Compared with MAX20057ATI/VY+T, MAX20090ATI/VY+ offers reduced integration for cost-sensitive single-rail designs, while TPS65321A-Q1 provides higher buck current flexibility but mandates external boost circuitry-making MAX20057ATI/VY+T the only solution combining dual-phase bucks, integrated preboost, and automotive thermal robustness in one 5mm × 5mm package.
Availability
MAX20057ATI/VY+T 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 MAX20057ATI/VY+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 power management semiconductors, serving automotive, industrial, and communications markets with AEC-Q100 qualified solutions.
The MAX20057ATI/VY+T belongs to Analog Devices' automotive PMIC portfolio, designed specifically to meet stringent OEM cold-crank, EMI, and functional safety requirements in modern vehicle electrical architectures.
FAQ
What is the maximum input voltage supported by the MAX20057ATI/VY+T?
The MAX20057ATI/VY+T supports a continuous input voltage range of 3.5V to 36V. Its absolute maximum rating allows transient exposure up to 40V on SUP, SUPSW1, SUPSW2, FB3, and EN pins relative to AGND. During cold-crank, the integrated boost controller maintains buck regulation even when battery voltage sags to 2.05V, extending effective operational range beyond the nominal input specification.
Does the MAX20057ATI/VY+T support external clock synchronization?
Yes, the MAX20057ATI/VY+T supports external clock synchronization via the FSYNC pin. It accepts input frequencies from 250kHz to 2.6MHz and uses an internal PLL to align buck switching edges-LX1 falling edge to FSYNC rising edge, LX2 falling edge to FSYNC falling edge-enabling precise 180° phase shift and EMI reduction through deterministic frequency placement.
How does the MAX20057ATI/VY+T handle thermal overload?
The MAX20057ATI/VY+T incorporates thermal shutdown protection that disables all regulators when junction temperature exceeds +170°C. After shutdown, the device remains off until junction temperature cools by 20°C (hysteresis), then automatically resumes operation. This behavior is guaranteed over the full -40°C to +125°C ambient range and complements the 27°C/W θJA thermal performance of its 5mm × 5mm TQFN-EP package.
Can the MAX20057ATI/VY+T operate with only one buck converter enabled?
Yes, the MAX20057ATI/VY+T supports independent control of each regulator via dedicated enable pins: EN1 for Buck1, EN2 for Buck2, and EN3 for the boost controller. When only Buck1 is enabled, quiescent current drops to 10μA; with only Buck2 enabled, it drops to 8μA. Full shutdown (all EN pins low) reduces supply current to 1μA, making it suitable for ultra-low-power automotive standby modes.
What is the purpose of the EXTVCC pin on the MAX20057ATI/VY+T?
The EXTVCC pin on the MAX20057ATI/VY+T allows bypassing the internal 5V BIAS LDO by applying an external 3.25V–5.5V supply-such as a clean buck output or system rail. When valid voltage is present, the IC switches BIAS internally to EXTVCC, disabling the LDO to reduce power dissipation and improve light-load efficiency. If EXTVCC falls below 3V, the internal LDO re-engages to maintain regulation.
MAX20057ATI/VY+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:
- Discontinued at Digi-Key
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 28-TQFN (5x5)
MAX20057ATI/VY+T FAQ
1.How can I place an order for MAX20057ATI/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20057ATI/VY+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 MAX20057ATI/VY+T reliable?
The price and inventory of MAX20057ATI/VY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20057ATI/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20057ATI/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20057ATI/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20057ATI/VY+T?
MAX20057ATI/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20057ATI/VY+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 MAX20057ATI/VY+T?
For technical support, including MAX20057ATI/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20057ATI/VY+T requirements.
6.How does Aetrix verify that MAX20057ATI/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20057ATI/VY+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 MAX20057ATI/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20057ATI/VY+T?
All MAX20057ATI/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20057ATI/VY+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 MAX20057ATI/VY+T part is unused and in its original packaging.
Return procedure for MAX20057ATI/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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