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Analog Devices Inc./Maxim Integrated MAX16935RAUE/V+TGE
- Part No.:
- MAX16935RAUE/V+TGE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16935RAUE/V+TGE.pdf
- Description:
- IC REG BUCK ADJ/1V 3.5A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,428
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Product details
Overview
MAX16935RAUE/V+TGE from Maxim Integrated is a 3.5A, current-mode synchronous step-down DC-DC converter with integrated high-side and low-side MOSFETs, designed for automotive power supplies operating from 3.5V to 36V input. It delivers fixed 5V output with ±2% accuracy, supports resistor-programmable switching frequency from 220kHz to 2.2MHz, and features 28µA quiescent current at no load - enabling compliance with automotive cold-crank and standby requirements.
For engineers reviewing the MAX16935RAUE/V+TGE datasheet, MAX16935RAUE/V+TGE pinout, MAX16935RAUE/V+TGE application, or MAX16935RAUE/V+TGE equivalent, this device is selected for AEC-Q100 qualified 5V point-of-load regulation in navigation head units, RF transceiver power rails requiring EMI-controlled FPWM mode, and distributed automotive DC systems needing cascaded SYNCOUT clocking.
Technical Context
The MAX16935RAUE/V+TGE implements current-mode control with cycle-by-cycle overcurrent protection and automatic LX slew-rate adjustment (4ns at >1.1MHz, 8ns otherwise) to optimize EMI/efficiency trade-offs. Its dual supply inputs (SUP and SUPSW) support undervoltage operation down to 3.5V while maintaining up to 98% duty cycle during cold-crank transients.
It integrates a 5V BIAS linear regulator (4.7–5.4V output), open-drain PGOOD with 95%/92% VFB thresholds, and SYNCOUT delivering 180° out-of-phase clock for synchronized multi-rail designs. FSYNC enables mode selection between skip mode (low IQ) and forced-PWM (EMI-stable), and external clock synchronization is supported within ±20% of internal fOSC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V (42V tolerant); supports automotive battery transients including load dump and cold crank. |
| Output Current | 3.5A continuous; validated for sustained operation across -40°C to +125°C junction temperature. |
| Quiescent Current | 28µA at no load; enables <100µA system standby power in always-on automotive modules. |
| Switching Frequency | 220kHz–2.2MHz, resistor-programmable via FOSC pin; allows optimization of inductor size vs. core loss. |
| Output Voltage Accuracy | ±2% for fixed 5V output; ensures stable logic rail regulation without external feedback trimming. |
| Thermal Protection | 175°C shutdown with 15°C hysteresis; prevents thermal runaway in enclosed automotive enclosures. |
| AEC-Q100 Grade | Qualified to Grade 1 (-40°C to +125°C ambient); certified for front-end automotive power applications. |
Pinout & Package
MAX16935RAUE/V+TGE is housed in a 16-pin, 5mm × 5mm TQFN-EP package with exposed thermal pad connected to PGND. The package supports high-power dissipation (θJA = 35°C/W) and meets automotive reflow standards (260°C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – SYNCOUT | Open-drain clock output | Delivers 180° out-of-phase signal relative to internal oscillator; enables phase-interleaved cascaded power supplies. |
| 2 – FSYNC | Mode control & sync input | Selects skip mode (AGND) or FPWM (BIAS/external clock); synchronizes to external clock within one cycle. |
| 3 – FOSC | Frequency setting input | Resistor-to-AGND sets fSW from 220kHz to 2.2MHz; determines inductor sizing and ripple trade-off. |
| 4 – OUT | Regulated output node | Provides 5V output; powers internal circuitry when VOUT ≥ 3V during standby. |
| 5 – FB | Feedback input | Connected to BIAS for fixed 5V; used with resistive divider for adjustable 1V–10V outputs. |
| 6 – COMP | Error amplifier output | Connects RC compensation network to stabilize loop response across line/load/temperature. |
| 7 – BIAS | Internal LDO output | 5V ±0.3V regulated supply for internal logic; bypassed with 1µF ceramic capacitor to AGND. |
| 8 – AGND | Analog ground reference | Separate ground for precision analog blocks; must be tied to PGND at single point near EP. |
| 9 – BST | High-side gate driver supply | Bootstrap capacitor (0.1µF) between BST and LX enables high-side MOSFET drive. |
| 10 – EN | Enable input | 3.3V–42V compatible; logic-high enables regulation, logic-low reduces IQ to 5µA in shutdown. |
| 11 – SUP | Main supply input | Powers internal bias regulator; bypassed with 4.7µF ceramic capacitor to PGND. |
| 12 – SUPSW | Switch supply input | Powers internal high-side MOSFET driver; bypassed with 0.1µF + 4.7µF ceramics to PGND. |
| 13–14 – LX | Switching node | Connects to Schottky diode cathode and inductor; requires careful layout to minimize EMI. |
| 15 – PGND | Power ground | Low-impedance return path for high-current switch node; tied to EP and system ground plane. |
| 16 – PGOOD | Open-drain power-good | Asserts high when VOUT > 95% of regulation; used for power sequencing with 10kΩ pull-up to BIAS. |
| EP – Exposed Pad | Thermal & electrical ground | Must be soldered to large contiguous copper area on PCB; not sole ground connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3.5A high- and low-side MOSFETs | Eliminates external power switches and reduces BOM count by ≥4 components versus discrete controllers. |
| 180° out-of-phase SYNCOUT clock | Enables two-phase interleaving with second MAX16935RAUE/V+TGE to halve input/output ripple current. |
| Automatic LX slew-rate control | Adjusts gate drive rise time (4ns/8ns) based on fOSC to minimize EMI without sacrificing efficiency. |
| Spread-spectrum modulation (factory option) | Reduces peak EMI amplitude by ±6% frequency dithering; disabled when externally synchronized. |
| Power-good monitor with 95%/92% thresholds | Provides precise sequencing control for downstream processors and FPGAs in automotive ECUs. |
| 98% maximum duty cycle capability | Maintains regulation during automotive cold-crank events where VIN drops to 3.5V with 5V output. |
Applications
| Navigation Head Unit Power Supply | RF Transceiver Bias Rail |
|---|---|
Use Scenario: Powering infotainment display, touch controller, and audio codec in automotive center-stack head units. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator supplying logic and analog subsystems. Use Value: 28µA quiescent current enables <100µA system standby; AEC-Q100 qualification ensures reliability over vehicle lifetime. |
Use Scenario: Providing clean, low-noise 5V supply to cellular/Wi-Fi/BLE RF transceivers in telematics control units. IC Role / Device Role / Timing Role: Fixed-frequency forced-PWM (FPWM) regulator synchronized to avoid spectral interference with RF bands. Use Value: FPWM mode eliminates variable switching frequency noise; 180° SYNCOUT enables dual-rail interleaving to reduce conducted EMI. |
| Distributed Automotive DC System | Cold-Crank Resilient ECU Core Supply |
Use Scenario: Cascading multiple regulators across body control module, gateway, and ADAS domain controllers. IC Role / Device Role / Timing Role: Master regulator generating SYNCOUT to slave devices for phase-aligned multi-rail operation. Use Value: 180° SYNCOUT eliminates beat frequencies; wide 3.5V–36V input handles battery voltage fluctuations across all vehicle states. |
Use Scenario: Delivering stable 5V core supply to microcontrollers in engine control units during cranking (VIN = 3.5V–6V). IC Role / Device Role / Timing Role: High-duty-cycle buck converter maintaining regulation under undervoltage transients. Use Value: 98% max duty cycle prevents dropout; thermal shutdown with auto-recovery ensures fault resilience in high-temp under-hood environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16939RAUE/V+TGE | Lower overvoltage protection threshold (105% vs. 107% of VFB); identical pinout, package, and electrical specs otherwise. | Better suited for systems requiring tighter OVP clamping on 5V rail, e.g., sensitive sensor interfaces. | Select MAX16939RAUE/V+TGE only if tighter OVP is required; MAX16935RAUE/V+TGE remains preferred for general-purpose 5V regulation. |
| LM61480QRNXTQ1 | 3.5A, 3.5V–36V input, but uses voltage-mode control; 15µA IQ; no SYNCOUT or 180° phase output; different pinout. | Lacks cascaded power supply capability and FPWM mode selection via FSYNC; simpler control loop. | Choose LM61480QRNXTQ1 for cost-sensitive, non-interleaved designs where SYNCOUT and mode flexibility are unnecessary. |
Compared with MAX16939RAUE/V+TGE, the MAX16935RAUE/V+TGE offers higher OVP threshold tolerance for robustness against transient overshoot; compared with LM61480QRNXTQ1, it provides unique 180° SYNCOUT and FSYNC-selectable FPWM/skip modes essential for EMI-critical automotive RF power rails.
Availability
MAX16935RAUE/V+TGE is available at Aetrix Electronics and suitable for automotive navigation systems, RF transceiver power supplies, and distributed DC power architectures requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for MAX16935RAUE/V+TGE 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 power management, interface, and sensing solutions.
The MAX16935/MAX16939 product line targets automotive-grade DC-DC conversion, delivering high-efficiency, low-IQ, and EMI-optimized regulation for demanding under-hood and infotainment applications.
FAQ
What is the output voltage configuration of the MAX16935RAUE/V+TGE?
The MAX16935RAUE/V+TGE is configured for fixed 5V output. This is achieved by connecting the FB pin directly to the BIAS pin. The device guarantees ±2% output voltage accuracy across temperature and line/load conditions, eliminating the need for external feedback resistors in standard 5V applications.
Does the MAX16935RAUE/V+TGE support external clock synchronization?
Yes, the MAX16935RAUE/V+TGE supports external clock synchronization via the FSYNC pin. When driven with a logic-level clock signal (1.8MHz–2.6MHz, ±20% of internal fOSC), the device locks to the external source within one cycle. Synchronization disables internal spread-spectrum modulation but passes any modulation present on the external clock to SYNCOUT.
How does the MAX16935RAUE/V+TGE handle cold-crank conditions?
The MAX16935RAUE/V+TGE maintains regulation during cold-crank events (VIN as low as 3.5V) by operating up to 98% duty cycle. Its dual-supply architecture (SUP and SUPSW) ensures internal bias and switch drivers remain functional even when input voltage falls below the 5V output, preventing dropout in engine-start scenarios.
What thermal protection features does the MAX16935RAUE/V+TGE include?
The MAX16935RAUE/V+TGE incorporates thermal shutdown at +175°C (typical) with 15°C hysteresis. Upon exceeding the threshold, the internal bias regulator and step-down controller disable; recovery occurs automatically once junction temperature falls below +160°C. This protects against sustained overload or poor heatsinking in sealed automotive enclosures.
Can the MAX16935RAUE/V+TGE be used in skip mode and forced-PWM mode?
Yes, the MAX16935RAUE/V+TGE supports both modes via the FSYNC pin. Connecting FSYNC to AGND enables skip mode for lowest quiescent current; connecting to BIAS or an external clock enables fixed-frequency forced-PWM (FPWM) mode to eliminate frequency variation and minimize EMI - critical for RF-sensitive applications.
MAX16935RAUE/V+TGE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V (5V)
- Voltage - Output (Max):
- 10V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 220kHz ~ 2.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MAX16935RAUE/V+TGE FAQ
1.How can I place an order for MAX16935RAUE/V+TGE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16935RAUE/V+TGE 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 MAX16935RAUE/V+TGE reliable?
The price and inventory of MAX16935RAUE/V+TGE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16935RAUE/V+TGE is usually 5 days.
3.What payment methods are accepted for MAX16935RAUE/V+TGE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16935RAUE/V+TGE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16935RAUE/V+TGE?
MAX16935RAUE/V+TGE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16935RAUE/V+TGE 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 MAX16935RAUE/V+TGE?
For technical support, including MAX16935RAUE/V+TGE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16935RAUE/V+TGE requirements.
6.How does Aetrix verify that MAX16935RAUE/V+TGE is sourced from the original manufacturer or authorized distributors?
All MAX16935RAUE/V+TGE 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 MAX16935RAUE/V+TGE meets industry standards.
7.What is the process for return or replacement of MAX16935RAUE/V+TGE?
All MAX16935RAUE/V+TGE units undergo pre-shipment inspection (PSI). If there is an issue with MAX16935RAUE/V+TGE, 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 MAX16935RAUE/V+TGE part is unused and in its original packaging.
Return procedure for MAX16935RAUE/V+TGE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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