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Analog Devices Inc./Maxim Integrated MAX20457ATIG/VY+
- Part No.:
- MAX20457ATIG/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX20457ATIG/VY+.pdf
- Description:
- IC REG BUCK 1V/1V DL 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:960
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Product details
Overview
The MAX20457ATIG/VY+ from Maxim Integrated is an automotive-grade dual synchronous buck converter IC supporting fixed 5V/3.3V outputs or adjustable 1V–14V outputs, with 3.5A/2A continuous current capability per channel, 3.5V–36V input range, and operation up to +125°C - designed for crank-ready automotive power systems including start-stop and instrument clusters.
For engineers reviewing the MAX20457ATIG/VY+ datasheet, MAX20457ATIG/VY+ pinout, MAX20457ATIG/VY+ application, or MAX20457ATIG/VY+ equivalent, key selection considerations include its 2.1MHz/400kHz selectable switching frequency, 180° out-of-phase dual-channel operation, spread-spectrum EMI reduction, thermal shutdown at 170°C, and integrated PGOOD indicators with 93.5% undervoltage threshold.
Technical Context
The MAX20457ATIG/VY+ integrates two valley-current-mode synchronous buck controllers operating 180° out of phase to minimize input ripple; each supports forced PWM or skip mode via FSYNC pin control and features independent enable (EN1/EN2), feedback (FB1/FB2), and power-good (PGOOD1/PGOOD2) signals.
It employs a thermally enhanced 5mm × 5mm TQFN-EP package with dedicated PGND1/PGND2/PGND3 planes, internal 5V BIAS LDO (with UVLO at 3.1V rising / 2.6V falling), and EXTVCC switchover capability enabling external 3.25V–5.5V bias supply to reduce internal dissipation and improve light-load efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports cold-crank (down to 3.5V) and load-dump conditions in automotive systems. |
| Output Current Capability | BUCK1: 3.5A max; BUCK2: 2A max - enables mid-to-high-power rail generation without external MOSFETs. |
| Switching Frequency Options | Fixed 2.1MHz or 400kHz - 2.1MHz enables compact magnetics; 400kHz maximizes efficiency at higher loads. |
| Thermal Shutdown Threshold | 170°C with 20°C hysteresis - ensures reliable operation under sustained high-power conditions in engine bay environments. |
| Quiescent Current | 10µA with both bucks enabled - meets OEM low-power standby requirements for always-on modules. |
| Feedback Reference Voltage | 1.0V ±15mV - enables precise output regulation across temperature and line/load variations. |
| Power-Good Threshold Accuracy | Rising: 95% VOUT; Falling: 93.5% VOUT - provides robust sequencing margin for downstream logic and analog circuits. |
| Minimum On-Time | 20ns (typ) - guarantees stable 3.3V output at 2.1MHz without skip-mode instability. |
Pinout & Package
MAX20457ATIG/VY+ uses a thermally enhanced 28-pin TQFN-EP package (5mm × 5mm, outline 21-100130) with exposed pad (EP) tied to AGND/PGND for optimal thermal performance in automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1, EN2 | Active-high enable inputs | Independent digital control of BUCK1/BUCK2; tolerate up to 40V - simplifies direct battery connection without level-shifting. |
| FB1, FB2 | Feedback inputs | Regulated to 1.0V reference; support fixed output (via internal divider) or adjustable 1V–14V via external resistor network. |
| PGOOD1, PGOOD2 | Open-drain power-good outputs | Assert low when output drops below 93.5% VOUT; used for rail sequencing and fault signaling in safety-critical systems. |
| LX1, LX2 | Switch-node connections | High dv/dt nodes driving external inductors; require tight layout and low-inductance paths to minimize EMI and switching losses. |
| BST1, BST2 | Bootstrap capacitor terminals | Supply gate drive for internal high-side MOSFETs; require 100nF+ ceramic capacitors between BSTx and corresponding LXx. |
| FSYNC | External clock synchronization input | Enables PLL-based synchronization to external clock; 50% duty cycle yields 180° phase shift between channels. |
| EXTVCC | External bias supply input | Accepts 3.25V–5.5V to bypass internal BIAS LDO - reduces thermal load and improves light-load efficiency. |
| PGND1, PGND2, PGND3, PGND | Dedicated power ground terminals | Separate ground returns for each buck channel and boost controller - critical for noise isolation and thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase dual-channel operation | Reduces input capacitor RMS current by ~30% versus in-phase converters - extends capacitor lifetime in high-temp automotive environments. |
| Skip mode with ultra-low quiescent current | 8–10µA supply current with one or both bucks active - meets stringent OEM sleep-mode power budgets. |
| Spread-spectrum modulation (±6%) | Reduces peak EMI amplitude by >10dB across AM band (530–1710kHz) without requiring additional filtering components. |
| Frequency foldback during dropout | Automatically shifts from 2.1MHz to 350kHz when VIN approaches VOUT - maintains regulation and prevents output droop during cold-crank events. |
| Cycle-by-cycle overcurrent protection with hiccup mode | Shuts down affected channel for ~10ms after sustained overcurrent - protects against short circuits while allowing automatic recovery if fault clears. |
Applications
| Automotive Start-Stop System | Instrument Cluster Power Supply |
|---|---|
Use Scenario: Powers microcontroller, display driver, and CAN transceiver during engine restart after stop, where battery voltage dips to 3.5V–6V. IC Role / Device Role / Timing Role: Dual-buck regulator delivering stable 5V and 3.3V rails with fast transient response and dropout operation at 95% duty cycle. Use Value: Maintains system functionality during cranking without brownout; 20ns minimum on-time prevents subharmonic oscillation at 2.1MHz. | Use Scenario: Supplies infotainment processor, TFT LCD bias, and touch controller in dashboard cluster with strict EMI limits near AM radio antennas. IC Role / Device Role / Timing Role: Dual-channel DC-DC converter with spread-spectrum and 180° phase shift to suppress conducted emissions into sensitive analog sections. Use Value: Meets CISPR 25 Class 5 radiated emission limits without added ferrites or shielding - reduces BOM cost and board area. |
| Navigation Head Unit | Distributed DC Power System |
Use Scenario: Generates isolated 5V and 3.3V rails for GPS module, audio codec, and SD card interface in head unit with wide input voltage variation. IC Role / Device Role / Timing Role: High-efficiency synchronous buck pair with EXTVCC switchover to improve light-load efficiency when powered from internal 5V rail. Use Value: Achieves >85% efficiency at 10mA load via skip mode - extends battery runtime during vehicle-off monitoring states. | Use Scenario: Centralized power management for ADAS camera modules, radar sensors, and domain controllers sharing common 12V battery input. IC Role / Device Role / Timing Role: Dual-output PMIC providing independently controlled, sequenced, and monitored power rails with PGOOD feedback to host MCU. Use Value: Enables centralized fault detection and graceful shutdown via PGOOD1/PGOOD2 assertion - improves system-level functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4332GQ-AEC1-Z | Single 3.5A buck with external compensation; no integrated 3.3V channel or PGOOD2; 2.2MHz fixed frequency only. | Lacks second regulated output and dual-rail sequencing - requires additional regulator for 3.3V rail in instrument cluster designs. | Select when only one high-current rail is needed and board space allows discrete 3.3V solution. |
| TPS653221A-Q1 | Triple-output PMIC (2 buck + 1 LDO); 2.2MHz switching; no spread spectrum; different pinout and enable logic (active-low). | Includes integrated LDO but lacks EXTVCC switchover and 180° phase shift - less effective for EMI-sensitive navigation units. | Prefer for multi-rail systems needing LDO bias, but verify thermal derating at 125°C ambient. |
Compared with MPQ4332GQ-AEC1-Z and TPS653221A-Q1, the MAX20457ATIG/VY+ uniquely delivers dual independent buck outputs with synchronized 180° operation, factory-enabled spread spectrum, and EXTVCC switchover - making it optimal for compact, EMI-constrained automotive modules requiring two tightly regulated rails.
Availability
MAX20457ATIG/VY+ is available at Aetrix Electronics and suitable for automotive start-stop systems, instrument cluster power supplies, and distributed DC power systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX20457ATIG/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
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets, with emphasis on reliability, integration, and AEC-Q100 qualification.
The MAX20457ATIG/VY+ belongs to Maxim's automotive power management portfolio, engineered specifically for crank-ready, EMI-sensitive, and thermally demanding vehicle subsystems such as infotainment and ADAS domains.
FAQ
What is the maximum junction temperature specification for the MAX20457ATIG/VY+?
The MAX20457ATIG/VY+ has a thermal shutdown threshold of 170°C with 20°C hysteresis. Its specified operating junction temperature range is -40°C to +150°C, and it is rated for continuous operation up to +125°C ambient for 95,000 hours. The device complies with AEC-Q100 Grade 0 requirements, ensuring robustness in under-hood automotive environments where the MAX20457ATIG/VY+ must sustain high thermal loads without derating.
How does the MAX20457ATIG/VY+ support automotive cold-crank conditions?
The MAX20457ATIG/VY+ supports cold-crank via its 3.5V–36V input range and 95% maximum duty cycle operation, enabling regulation even when battery voltage collapses to 3.5V. It also implements frequency foldback - automatically reducing switching frequency from 2.1MHz to 350kHz when input drops near output voltage - preserving regulation stability. These features ensure uninterrupted 5V/3.3V rail delivery during engine cranking, a core requirement validated in MAX20457ATIG/VY+ automotive qualification testing.
Can the MAX20457ATIG/VY+ generate adjustable output voltages, and what is the supported range?
Yes, the MAX20457ATIG/VY+ supports adjustable output voltages from 1V to 14V on both BUCK1 and BUCK2 channels using external resistor dividers connected to FB1 and FB2. The internal feedback reference is 1.0V ±15mV, and bottom resistors should be ≤100kΩ. For example, a 50kΩ bottom resistor with appropriate top resistor yields precise 5V or 3.3V outputs. This flexibility allows the MAX20457ATIG/VY+ to replace multiple fixed-output regulators in multi-voltage automotive systems.
What is the purpose of the EXTVCC pin on the MAX20457ATIG/VY+, and how should it be used?
The EXTVCC pin on the MAX20457ATIG/VY+ allows bypassing the internal 5V BIAS LDO by applying an external 3.25V–5.5V supply - reducing internal power dissipation and improving light-load efficiency. When valid voltage is present, the IC switches bias internally to EXTVCC and disables the LDO. If EXTVCC drops below ~3V, the LDO re-enables automatically. This feature makes the MAX20457ATIG/VY+ ideal for systems where a clean 5V rail is already available, such as from another buck converter output.
Does the MAX20457ATIG/VY+ include built-in protection features, and which ones are implemented?
Yes, the MAX20457ATIG/VY+ includes cycle-by-cycle current limiting, thermal shutdown at 170°C, undervoltage lockout on BIAS (3.1V rising / 2.6V falling), and hiccup-mode overcurrent recovery. It also features dedicated PGOOD1/PGOOD2 outputs with 93.5% undervoltage detection and soft-start timing (5.5ms typical). These protections are fully integrated and tested per AEC-Q100, ensuring the MAX20457ATIG/VY+ sustains safe operation during load dumps, shorts, and thermal overload in automotive applications.
MAX20457ATIG/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V (3.3V), 1V (5V)
- Voltage - Output (Max):
- 14V, 14V
- Current - Output:
- -
- 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)
MAX20457ATIG/VY+ FAQ
1.How can I place an order for MAX20457ATIG/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20457ATIG/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 MAX20457ATIG/VY+ reliable?
The price and inventory of MAX20457ATIG/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20457ATIG/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20457ATIG/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20457ATIG/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20457ATIG/VY+?
MAX20457ATIG/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20457ATIG/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 MAX20457ATIG/VY+?
For technical support, including MAX20457ATIG/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20457ATIG/VY+ requirements.
6.How does Aetrix verify that MAX20457ATIG/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20457ATIG/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 MAX20457ATIG/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20457ATIG/VY+?
All MAX20457ATIG/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20457ATIG/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 MAX20457ATIG/VY+ part is unused and in its original packaging.
Return procedure for MAX20457ATIG/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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