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Analog Devices Inc./Maxim Integrated MAX20471ASAA/V+
- Part No.:
- MAX20471ASAA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX20471ASAA/V+.pdf
- Description:
- IC REG BOOST 5V 500MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,454
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Product details
Overview
MAX20471ASAA/V+ from Analog Devices is a high-efficiency, automotive-grade synchronous boost converter IC that converts 3.0V–4.0V input to a factory-preset 5.0V output at up to 500mA, achieving ±1.5% output voltage accuracy over load, line, and temperature (−40°C to +125°C). It operates at 2.2MHz fixed-frequency PWM mode with spread-spectrum modulation, integrates low-RDS(ON) MOSFETs (150mΩ pMOS / 100mΩ nMOS), and features True Shutdown™, soft-start (1.9ms), and open-drain RESET output for automotive point-of-load and CAN transceiver power rails.
For engineers reviewing the MAX20471ASAA/V+ datasheet, MAX20471ASAA/V+ pinout, MAX20471ASAA/V+ application, or MAX20471ASAA/V+ equivalent, key selection considerations include its 8-pin SOIC package, 5V/500mA factory-configured output, 2.2MHz switching frequency enabling all-ceramic designs, and integrated protections including overtemperature (165°C shutdown), current-limit (1.4A–4A range), and UV/OV monitoring on RESET.
Technical Context
The MAX20471ASAA/V+ implements a current-mode, synchronous boost architecture with dual-operation modes: forced-PWM (FPWM) enabled via SYNC pin high or external clock, and pulse-skipping (SKIP) for light-load efficiency-automatically transitioning based on load current threshold. Its internal oscillator delivers 2.2MHz nominal switching with ±3% spread-spectrum modulation to reduce EMI.
It integrates a 2A typ charge-mode current source for rapid output pre-charge, soft-start ramp control, and independent UV/OV detection (93±2% UV, 107±2% OV) mapped to an open-drain RESET pin with four selectable hold times (0.5ms/3.7ms/7.4ms/14.8ms). The device uses analog ground (AV) and power ground (PGND) separation for noise-sensitive regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set 5.0V ±1.5% - ensures stable rail for CAN transceivers without external feedback resistors. |
| Output Current | 500mA continuous - supports single CAN FD transceiver or multiple low-power automotive sensors. |
| Input Voltage Range | 3.0V to 4.0V - compatible with automotive battery-supplied 3.3V domains and degraded 12V system rails. |
| Switching Frequency | 2.2MHz ±10% - enables use of small 1µH inductor and all-ceramic capacitors; minimizes EMI with spread-spectrum. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 requirements. |
| Shutdown Current | 0.1µA to 2µA - preserves battery life during vehicle sleep mode with True Shutdown™ disabling output fully. |
| Protection Features | Overtemperature (165°C shutdown +15°C hysteresis), current-limit (1.4A–4A configurable), UVLO (2.55V rising), short-circuit recovery via hiccup mode. |
Pinout & Package
MAX20471ASAA/V+ is housed in an 8-pin SOIC (0.150") package with exposed pad (Package Code: S8+2C), optimized for thermal dissipation in automotive PCB layouts. Pin 1 is EN; Pin 8 is SYNC; Pin 5 is LX; Pin 6 is PGND; Pin 7 is RESET; Pin 3 is OUT; Pin 4 is GND; Pin 2 is AV.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Active-high enable input | Drives IC into full operation when pulled ≥1.5V; 100mV hysteresis prevents chatter near threshold. |
| OUT (Pin 3) | Main regulated output | 5.0V output node; requires 22µF ceramic capacitor for stability and ripple suppression. |
| LX (Pin 5) | Switch node connection | Connects to inductor's switched side; carries high di/dt; must be routed with minimal loop area. |
| PGND (Pin 6) | Power ground return | Separate low-impedance return path for high-current switching; tied to exposed pad for thermal conduction. |
| RESET (Pin 7) | Open-drain fault indicator | Asserts low if output falls below 93% or exceeds 107% of 5.0V; requires external pull-up for logic-level signal. |
| AV (Pin 2) | Analog power supply | Provides clean bias for internal reference and error amplifier; decoupled with 1µF X7R ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Output discharges to 0V with RDISCH = 300Ω internal path - eliminates leakage into downstream circuitry during sleep. |
| Synchronous Boost Architecture | Integrated 150mΩ pMOS and 100mΩ nMOS switches - eliminates external diode, improves efficiency >90% at mid-load. |
| Programmable Spread Spectrum | ±3% frequency dithering - reduces peak radiated emissions by spreading energy across 2.14–2.26MHz band. |
| Factory-Configured Output | 5.0V preset in 50mV steps - eliminates external resistor divider, saves board space, and guarantees accuracy without trimming. |
| Charge Mode Pre-charge | 2A typical current source - rapidly lifts output from 0V to within 600mV of input before soft-start, avoiding startup brownout. |
Applications
| Automotive CAN Transceiver Power | Infotainment System Point-of-Load |
|---|---|
Use Scenario: Supplying isolated 5V rail to high-speed CAN FD transceivers (e.g., TJA1044, SN65HVD230) in body control modules. IC Role / Device Role / Timing Role: Primary 5V boost regulator delivering clean, low-noise power with fast transient response to handle CAN bus arbitration spikes. Use Value: Enables direct replacement of discrete boost solutions; ±1.5% accuracy ensures transceiver VCC compliance across temperature; RESET pin provides fault signaling to MCU. |
Use Scenario: Generating 5V for USB-C PD controllers, display backlight drivers, or audio codecs in center-stack infotainment units. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC stage converting 3.3V domain to higher-voltage auxiliary rail with minimal BOM count. Use Value: 2.2MHz operation allows 1µH inductor and 22µF ceramic output cap - reduces solution size by >40% vs. lower-frequency alternatives. |
| ADAS Camera Module Bias Supply | Automotive Gateway Microcontroller Core Rail |
Use Scenario: Providing stable 5V bias to image sensor interfaces (e.g., MIPI CSI-2 PHY) and lens actuator drivers in surround-view cameras. IC Role / Device Role / Timing Role: Low-noise, high-PSRR boost converter ensuring clean analog supply for precision imaging circuits. Use Value: Spread-spectrum modulation suppresses switching noise near sensitive analog bands; -40°C to +125°C rating supports under-hood mounting. |
Use Scenario: Powering 5V core logic of automotive gateway MCUs (e.g., S32K3, TC3xx) requiring tight voltage tolerance and fail-safe monitoring. IC Role / Device Role / Timing Role: Fault-aware power management IC providing regulated 5V with integrated UV/OV watchdog and reset assertion. Use Value: RESET pin with 93±2% UV and 107±2% OV thresholds enables autonomous MCU reset without external supervisor IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX20471ATCA/V+ | Same 5V/500mA output but in 12-pin TDFN (3mm × 3mm); higher thermal performance (θJA = 41°C/W vs. SOIC's 128.4°C/W). | Better suited for space-constrained, thermally demanding modules where PCB real estate is limited. | Select MAX20471ATCA/V+ when layout density or junction temperature rise must be minimized; MAX20471ASAA/V+ preferred for legacy SOIC footprints and ease of rework. |
| TPS61232DRCR | 5V/500mA boost with 2.5MHz switching; no spread spectrum; only 100mV UV/OV tolerance (vs. ±2%); no factory-trimmed output. | Lacks automotive qualification (−40°C to +125°C not guaranteed); no RESET pin with programmable hold time. | Use TPS61232DRCR only in non-automotive industrial applications where cost is prioritized over AEC-Q100 compliance and diagnostic capability. |
Compared with MAX20471ATCA/V+, MAX20471ASAA/V+ trades thermal efficiency for through-hole assembly compatibility and serviceability; compared with TPS61232DRCR, it delivers tighter regulation, built-in diagnostics, and full automotive qualification - critical for safety-relevant power domains.
Availability
MAX20471ASAA/V+ is available at Aetrix Electronics and suitable for automotive CAN transceivers, infotainment point-of-load supplies, and ADAS camera bias rails requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for MAX20471ASAA/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, communications, and healthcare markets.
The MAX20471ASAA/V+ belongs to the MAX2047x family of low-voltage synchronous boost converters designed specifically for automotive power management - emphasizing high accuracy, integrated diagnostics, and robust operation in harsh environments.
FAQ
What is the factory-configured output voltage of the MAX20471ASAA/V+?
The MAX20471ASAA/V+ is factory-configured to deliver a precise 5.0V output with ±1.5% accuracy over load, line, and temperature (−40°C to +125°C). This fixed output eliminates the need for external feedback resistors and ensures consistent performance across automotive operating conditions without user calibration.
Does the MAX20471ASAA/V+ support spread-spectrum frequency modulation?
Yes, the MAX20471ASAA/V+ includes built-in spread-spectrum frequency modulation (±3% around 2.2MHz) to reduce peak radiated EMI. This feature is enabled by default and does not require external configuration - it operates pseudorandomly to avoid audible noise and simplify EMC compliance testing in automotive systems.
How does the RESET pin function on the MAX20471ASAA/V+?
The RESET pin on the MAX20471ASAA/V+ is an open-drain output that asserts low when the 5.0V output falls below 93% (4.65V) or rises above 107% (5.35V) of nominal. It holds low for a factory-selectable timeout (0.5ms/3.7ms/7.4ms/14.8ms) after regulation is restored, providing reliable fault signaling to microcontrollers in automotive gateways and ECUs.
What package type is used for the MAX20471ASAA/V+?
The MAX20471ASAA/V+ uses an 8-pin SOIC (0.150") package with exposed pad (Package Code: S8+2C), RoHS-compliant and automotive-qualified. Its through-hole-compatible footprint simplifies prototyping and repair while maintaining thermal performance via the EP-to-ground connection - distinct from the TDFN/SWTDFN variants in the same family.
Can the MAX20471ASAA/V+ operate in both forced-PWM and skip modes?
Yes, the MAX20471ASAA/V+ supports dual operation modes controlled by the SYNC pin: forced-PWM (FPWM) when SYNC is pulled high to VAV or driven by an external clock, and pulse-skipping (SKIP) when SYNC is grounded or left floating. This enables optimal efficiency across full load range - FPWM for low-noise, SKIP for ultra-low quiescent current in standby.
MAX20471ASAA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 4V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX20471ASAA/V+ FAQ
1.How can I place an order for MAX20471ASAA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20471ASAA/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 MAX20471ASAA/V+ reliable?
The price and inventory of MAX20471ASAA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20471ASAA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20471ASAA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20471ASAA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20471ASAA/V+?
MAX20471ASAA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20471ASAA/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 MAX20471ASAA/V+?
For technical support, including MAX20471ASAA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20471ASAA/V+ requirements.
6.How does Aetrix verify that MAX20471ASAA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20471ASAA/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 MAX20471ASAA/V+ meets industry standards.
7.What is the process for return or replacement of MAX20471ASAA/V+?
All MAX20471ASAA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20471ASAA/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 MAX20471ASAA/V+ part is unused and in its original packaging.
Return procedure for MAX20471ASAA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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