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Analog Devices Inc./Maxim Integrated MAX20474ATDA/V+
- Part No.:
- MAX20474ATDA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
MAX20474ATDA/V+.pdf
- Description:
- IC REG BOOST ADJ 14TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:760
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Product details
Overview
MAX20474ATDA/V+ from Analog Devices is a synchronous boost DC-DC converter IC designed for automotive point-of-load applications, delivering 6V to 18V output from a 3.0V–5.5V input at up to 1A load, with ±1.5% fixed-output voltage accuracy, 2.2MHz switching frequency, and integrated low-RDS(ON) MOSFETs.
For engineers reviewing the MAX20474ATDA/V+ datasheet, MAX20474ATDA/V+ pinout, MAX20474ATDA/V+ application, or MAX20474ATDA/V+ equivalent, key selection considerations include its 3mm × 3.5mm 14-pin TDFN package, True Shutdown™ capability, RESET output with factory-programmable timeout, spread-spectrum EMI reduction, and dual-mode (PWM/SKIP) operation for light-load efficiency.
Technical Context
The MAX20474ATDA/V+ implements current-mode control with forced-PWM and pulse-skipping (SKIP) modes selectable via the SYNC pin; it integrates high-side pMOS (150mΩ) and low-side nMOS (100mΩ) switches, a 2.2MHz spread-spectrum oscillator (±3%), and internal slope compensation optimized for fixed-output variants.
It features dedicated analog power (AV), bias LDO (BIAS), and regulator (REG) rails, along with precision OV/UV monitoring (121±3% / 81±3%) mapped to an open-drain RESET output, and supports soft-start (1.9ms) and hiccup-mode recovery during startup or post-regulation short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - powers directly from automotive battery or LDO rail without pre-regulation |
| Output Voltage Range | 6V to 18V (fixed or resistor-adjustable) - covers CAN FD transceivers, sensors, and display backlight supplies |
| Switching Frequency | 2.2MHz (±10%) - enables all-ceramic designs and minimizes inductor size |
| Output Accuracy | ±1.5% (fixed), ±2.2% (adjustable) - ensures stable regulation across -40°C to +125°C |
| Peak Input Current | 4.0A - supports high transient loads without input rail collapse |
| Thermal Shutdown | 165°C with 15°C hysteresis - protects against sustained overload or poor PCB thermal design |
| RESET Timeout Options | Factory-programmable: 0.5ms / 3.7ms / 7.4ms / 14.9ms - configurable fail-safe delay for system sequencing |
Pinout & Package
Package: 3mm × 3.5mm, 14-pin TDFN (T143A3+1C) with exposed pad (EP) connected to PGND for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BIAS) | BIAS LDO output | Supplies internal analog circuitry; requires 2.2μF ceramic capacitor to GND for stability |
| 2 (AV) | Analog power supply | Low-noise 5V rail input; decoupled with 0.1μF ceramic capacitor |
| 3 (REG) | LDO output for protection logic | Must connect capacitor to OUT per Table 1 if short-circuit protection required |
| 4 (OUTS) | Output voltage feedback | Shorted to OUT for fixed versions; connects to resistor divider for adjustable outputs |
| 5 (OUT) | Regulated boost output | Delivers 6V–18V at up to 1A; drives downstream loads directly |
| 6–7 (LX) | Switch node | Connects to inductor; carries high di/dt; requires tight layout to minimize EMI |
| 8–9 (PGND) | Power ground | Separate return path for high-current switching; must be tied to EP and GND |
| 10 (RESET) | Open-drain fault indicator | Asserts low on OV/UV violation; requires external pull-up for logic-level signaling |
| 11 (SSEN) | Spread-spectrum enable | High = ±3% frequency modulation enabled; low = disabled |
| 12 (SYNC) | Mode selection clock input | GND/unconnected = SKIP mode; AV/external clock = forced-PWM mode |
| 13 (GND) | Digital ground | Reference for EN, SSEN, SYNC; tied to EP and PGND |
| 14 (EN) | Active-high enable | Threshold ~1V with 80mV hysteresis; controls startup sequence and True Shutdown™ |
| EP | Exposed thermal pad | Must be soldered to solid GND plane; primary thermal path (θJA = 45.15°C/W) |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Drives OUT to 0V with <1μA shutdown current - eliminates leakage paths in off-state systems |
| Synchronous Boost Architecture | Integrated 150mΩ pMOS / 100mΩ nMOS - achieves >90% efficiency at 1A, simplifies BOM vs discrete solutions |
| Programmable Spread Spectrum | ±3% frequency dither - reduces peak radiated emissions by >10dB without external filtering |
| Automotive-Grade Protection | Cycle-by-cycle current limit, hiccup-mode short-circuit recovery, and 165°C thermal shutdown - meets AEC-Q100 stress requirements |
| Fixed Soft-Start | 1.9ms ramp time - limits inrush current to prevent input rail droop during cold cranking |
Applications
| Automotive Camera Power Supply | ADAS Radar Module Bias |
|---|---|
Use Scenario: Powers 12V image sensor and ISP in rear-view or surround-view camera modules under 12V battery input with cold-cranking dips. IC Role / Device Role / Timing Role: Synchronous boost converter providing regulated 12V output with fast load-transient response to handle sensor burst modes. Use Value: 2.2MHz operation ensures minimal output ripple during pixel readout; RESET output signals fault to host MCU for diagnostic logging. | Use Scenario: Supplies 8V–15V bias to RF front-end and signal chain in 77GHz radar transceivers operating in engine bay environments. IC Role / Device Role / Timing Role: High-precision boost regulator with ±1.5% accuracy maintaining stable VCO and LNA supply despite wide temperature swings. Use Value: Integrated OV/UV monitoring on RESET pin enables fail-safe shutdown before RF performance degradation occurs. |
| Infotainment Display Backlight | Telematics Cellular Modem Supply |
Use Scenario: Generates 18V for LED backlight drivers in digital instrument clusters where input drops to 3.0V during stop-start cycles. IC Role / Device Role / Timing Role: Adjustable-output boost converter supporting 18V at 500mA with SKIP mode for low-idle power consumption. Use Value: Spread-spectrum modulation suppresses EMI near sensitive audio amplifiers and touch controllers in cockpit electronics. | Use Scenario: Provides 6V–12V supply to LTE/5G modems in telematics control units requiring robust operation across -40°C to +125°C ambient. IC Role / Device Role / Timing Role: Automotive-qualified boost IC with True Shutdown™ enabling deep-sleep current <1μA during cellular idle states. Use Value: 14-pin TDFN package allows compact placement near modem IC; RESET output synchronizes modem reset with power-good assertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5122MH/NOPB | Wider input range (3V–75V), external MOSFETs, no integrated spread spectrum | Used in industrial HV boost; lacks automotive temp grade and RESET diagnostics | Select when input exceeds 5.5V or higher output current (>2A) needed |
| TPS61088RHLR | Lower max output (12.6V), no OV/UV monitoring, no automotive temp rating (-40°C to +85°C only) | Consumer portable electronics; not qualified for automotive use | Select for cost-sensitive non-automotive designs requiring <12.6V output |
Compared with LM5122MH/NOPB and TPS61088RHLR, the MAX20474ATDA/V+ uniquely combines AEC-Q100 qualification, integrated diagnostics (RESET with programmable timeout), and spread-spectrum EMI control in a thermally optimized 3mm × 3.5mm package - making it the only drop-in solution for safety-critical automotive boost rails requiring functional safety awareness.
Availability
MAX20474ATDA/V+ is available at Aetrix Electronics and suitable for automotive camera power supplies, ADAS radar modules, infotainment display backlights, and telematics modem supplies requiring stable component supply across extended temperature and long lifecycle demands.
Supply support for MAX20474ATDA/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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets.
The MAX20474ATDA/V+ belongs to Analog Devices' automotive power management portfolio, engineered specifically for robust, low-EMI point-of-load conversion in safety-critical vehicle subsystems operating from 3.0V to 5.5V inputs.
FAQ
What is the maximum output current supported by the MAX20474ATDA/V+?
The MAX20474ATDA/V+ delivers up to 1A of continuous output current at its regulated voltage (6V–18V). Its 4.0A peak input current rating supports transient loads, while integrated 150mΩ pMOS and 100mΩ nMOS switches maintain high efficiency. Thermal derating applies above +70°C ambient per θJA = 45.15°C/W, and the device enters thermal shutdown at 165°C junction temperature.
Does the MAX20474ATDA/V+ support adjustable output voltage, and how is it configured?
Yes, the MAX20474ATDA/V+ supports resistor-adjustable output from 6V to 18V using an external feedback divider connected to the OUTS pin. The internal reference is 812mV (typ), so RHIGH = RLOW × (VOUT/0.812 − 1). The parallel resistance must be ≤30kΩ to minimize contamination-induced errors. For fixed-output versions, OUTS is internally shorted to OUT - leaving it unconnected risks damage.
How does the SYNC pin affect the operation mode of the MAX20474ATDA/V+?
The SYNC pin selects between two operating modes: when pulled to GND or left floating, the MAX20474ATDA/V+ operates in pulse-skipping (SKIP) mode for optimal light-load efficiency; when tied to AV or driven by an external 1.7–2.6MHz clock, it enters forced-PWM mode for constant-frequency operation and reduced EMI variability. Mode transitions are allowed dynamically but require disabling EN first to avoid output overshoot.
What protection features are integrated into the MAX20474ATDA/V+?
The MAX20474ATDA/V+ integrates overcurrent protection (cycle-by-cycle current limiting with hiccup-mode recovery), overtemperature shutdown (165°C with 15°C hysteresis), input UVLO (2.2V/2.5V thresholds), output OV/UV monitoring (121±3%/81±3% of nominal), and True Shutdown™. The RESET pin asserts low during any fault condition and holds for a factory-programmable timeout (0.5ms to 14.9ms) after regulation resumes.
Is the MAX20474ATDA/V+ qualified for automotive applications, and what is its temperature rating?
Yes, the MAX20474ATDA/V+ is designed and tested for automotive use with an operating temperature range of -40°C to +125°C ambient, meeting AEC-Q100 stress test requirements. Its 3mm × 3.5mm TDFN package includes an exposed thermal pad for efficient heat dissipation, and all specifications - including ±1.5% output accuracy and RESET timing - are guaranteed across this full range.
MAX20474ATDA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 6V
- Voltage - Output (Max):
- 18V
- Current - Output:
- -
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TDFN (3x3.5)
MAX20474ATDA/V+ FAQ
1.How can I place an order for MAX20474ATDA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20474ATDA/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 MAX20474ATDA/V+ reliable?
The price and inventory of MAX20474ATDA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20474ATDA/V+ is usually 5 days.
3.What payment methods are accepted for MAX20474ATDA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20474ATDA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20474ATDA/V+?
MAX20474ATDA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20474ATDA/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 MAX20474ATDA/V+?
For technical support, including MAX20474ATDA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20474ATDA/V+ requirements.
6.How does Aetrix verify that MAX20474ATDA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX20474ATDA/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 MAX20474ATDA/V+ meets industry standards.
7.What is the process for return or replacement of MAX20474ATDA/V+?
All MAX20474ATDA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20474ATDA/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 MAX20474ATDA/V+ part is unused and in its original packaging.
Return procedure for MAX20474ATDA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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