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Analog Devices Inc./Maxim Integrated MAX16935RAUE/V+GE
- Part No.:
- MAX16935RAUE/V+GE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16935RAUE/V+GE.pdf
- Description:
- IC REG BUCK ADJ/1V 3.5A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,845
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Product details
Overview
MAX16935RAUE/V+GE 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 rails requiring 3.5V–36V input, 5V fixed output (±2%), 28µA no-load quiescent current, and 2.2MHz switching frequency - used in navigation head units and RF-sensitive infotainment systems.
For engineers reviewing the MAX16935RAUE/V+GE datasheet, MAX16935RAUE/V+GE pinout, MAX16935RAUE/V+GE application, or MAX16935RAUE/V+GE equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and protection behavior, and real-world substitution guidance for AEC-Q100-compliant 5V point-of-load designs.
Technical Context
The MAX16935RAUE/V+GE implements a current-mode control architecture with resistor-programmable oscillator (220kHz–2.2MHz), automatic LX slew-rate adjustment (4ns at >1.1MHz), and dual-mode light-load operation: skip mode (FSYNC = AGND) for ultra-low IQ or forced-PWM (FSYNC = BIAS/external clock) to suppress EMI in RF transceiver supplies.
It integrates a 5V linear regulator (BIAS) powering internal circuitry, supports 98% duty cycle during cold-crank undervoltage transients, and provides 180° out-of-phase SYNCOUT for cascaded multi-phase buck stages - all within -40°C to +125°C automotive temperature range and AEC-Q100 qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V (42V transient tolerant); enables direct connection to automotive battery without pre-regulation |
| Output Current | 3.5A continuous; supports high-current digital loads like SoCs and display drivers |
| Quiescent Current | 28µA at no load; meets automotive standby power requirements (e.g., ISO 16750-2) |
| Switching Frequency | 2.2MHz (RFOSC = 12kΩ); allows compact 2.2µH inductors and reduces EMI fundamental below AM band |
| Output Voltage Accuracy | ±2% for 5V fixed output; ensures stable logic rail compliance across temperature and line/load variation |
| Duty Cycle Max | 98%; sustains regulation during 6V cold-crank events without dropout |
| Thermal Shutdown | 175°C with 15°C hysteresis; protects against sustained overload in enclosed automotive enclosures |
Pinout & Package
MAX16935RAUE/V+GE is housed in a 16-pin, 5mm × 5mm TQFN-EP package with exposed pad connected to PGND for thermal dissipation. Pin numbering follows top-view orientation with EP centered beneath the die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – SYNCOUT | Open-drain clock output | 180° out-of-phase signal relative to internal oscillator; enables synchronized cascading of multiple converters |
| 2 – FSYNC | Mode selection & sync input | Drives skip mode (AGND) or FPWM (BIAS/external clock); eliminates frequency jitter for RF supply stability |
| 3 – FOSC | Oscillator frequency setting | Resistor-to-AGND sets fSW from 220kHz to 2.2MHz; determines inductor size and EMI profile |
| 4 – OUT | Regulated output node | Delivers 5V ±2% to load; powers internal circuitry when VOUT ≥ 3V in standby |
| 5 – FB | Feedback input | Connected to BIAS for 5V fixed output; or to resistive divider for 1V–10V adjustable regulation |
| 6 – COMP | Error amplifier output | Connects RC compensation network to stabilize loop response across full load and temperature range |
| 7 – BIAS | Integrated 5V LDO output | Powers internal analog blocks; bypassed with 1µF ceramic capacitor to AGND |
| 8 – AGND | Analog ground reference | Separate from PGND to minimize noise coupling into feedback and control circuits |
| 9 – BST | High-side gate driver supply | 0.1µF bootstrap capacitor between BST and LX enables high-side MOSFET drive above VIN |
| 10 – EN | Enable input | 3.3V–42V logic-compatible; asserts device from shutdown with <8ms soft-start ramp |
| 11 – SUP | Main supply input | Powers internal LDO; bypassed with 4.7µF ceramic capacitor to PGND |
| 12 – SUPSW | Switch supply input | Powers high-side MOSFET driver; bypassed with 0.1µF + 4.7µF ceramics to PGND |
| 13–14 – LX | Switch node | Connects to Schottky diode cathode and inductor; slew rate auto-adjusted for EMI/efficiency trade-off |
| 15 – PGND | Power ground | Low-impedance return path for high-current switch and output capacitor |
| 16 – PGOOD | Open-drain power-good | Asserts when VOUT > 95% of regulation; deasserts at 92%; enables safe power sequencing |
| EP – Exposed Pad | Thermal & electrical ground | Must be soldered to large copper plane tied to PGND; not sole ground connection |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3.5A high- and low-side MOSFETs | Eliminates external switch components; reduces BOM count and layout area in space-constrained modules |
| 180° out-of-phase SYNCOUT | Enables interleaved operation with second MAX16935RAUE/V+GE to halve input/output ripple current |
| Automatic LX slew-rate control | 4ns rise time at 2.2MHz minimizes EMI without sacrificing efficiency; avoids manual gate-resistor tuning |
| AEC-Q100 qualified (-40°C to +125°C) | Validated for under-hood and dashboard applications; includes thermal shutdown with hysteresis and overvoltage protection |
| 28µA no-load quiescent current | Meets automotive "always-on" module sleep current limits; extends battery life during vehicle off-state |
Applications
| Navigation Head Units | Automotive Infotainment Processors |
|---|---|
Use Scenario: Powering LCD display controllers and audio codecs in centralized car navigation systems operating across 6V–16V battery range. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator delivering 3.5A with tight voltage accuracy and cold-crank support. Use Value: Maintains 5V regulation during 6V cold-crank transients via 98% max duty cycle, preventing system reset. |
Use Scenario: Supplying core voltage to ARM-based infotainment SoCs requiring low-noise, EMI-controlled 5V rails adjacent to RF receivers. IC Role / Device Role / Timing Role: Fixed-frequency forced-PWM (FPWM) regulator synchronized to avoid interference with cellular/WiFi bands. Use Value: Eliminates variable-frequency skip-mode emissions; 2.2MHz operation shifts switching harmonics above sensitive RF front-ends. |
| Telematics Control Units (TCUs) | ADAS Camera Power Modules |
Use Scenario: Providing always-on 5V supply to CAN transceivers and GPS modules in telematics gateways with strict standby current budgets. IC Role / Device Role / Timing Role: Low-IQ buck converter enabling <30µA system sleep current while maintaining regulated 5V rail. Use Value: 28µA quiescent current meets ISO 16750-2 Class D requirements for long-term battery drain prevention. |
Use Scenario: Powering image sensors and ISP processors in rear-view or surround-view camera ECUs exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Automotive-grade buck converter with -40°C to +125°C operation and thermal shutdown recovery. Use Value: Sustains regulation up to +125°C ambient; thermal shutdown at 175°C junction with 15°C hysteresis prevents latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQR | 4.5A rated, 3.5V–36V input, 12µA IQ, but no integrated low-side FET or SYNCOUT phase-shift capability | Lacks 180° cascading output and FPWM/skip mode selection; requires external low-side switch for full functionality | Select when higher output current and lower IQ are prioritized over synchronization and mode flexibility |
| TPS62933RTER | 3A rated, 3V–18V input, 15µA IQ, supports FPWM/skip, but not AEC-Q100 qualified or 36V tolerant | Not suitable for 24V commercial vehicles or 42V load-dump conditions; limited to passenger-car 12V systems | Select only for cost-sensitive 12V-only applications where AEC-Q100 and 36V operation are unnecessary |
Compared with LM61480RQR and TPS62933RTER, MAX16935RAUE/V+GE uniquely combines AEC-Q100 qualification, 36V input tolerance, integrated low-side FET for true FPWM light-load operation, and 180° SYNCOUT - making it the only option for robust, synchronized, automotive-grade 5V/3.5A point-of-load conversion.
Availability
MAX16935RAUE/V+GE is available at Aetrix Electronics and suitable for automotive infotainment, telematics control units, and ADAS camera modules requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX16935RAUE/V+GE 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-reliability analog and mixed-signal ICs for automotive, industrial, and communications markets, with emphasis on power management and interface solutions.
MAX16935RAUE/V+GE belongs to Maxim's automotive-grade DC-DC converter family engineered specifically for harsh-environment 12V/24V vehicle systems - delivering low-IQ operation, cold-crank resilience, and EMI-controlled switching for safety-critical and infotainment subsystems.
FAQ
What is the exact output voltage tolerance of MAX16935RAUE/V+GE in fixed 5V mode?
The MAX16935RAUE/V+GE delivers 5V output with ±2% accuracy (4.9V to 5.1V) in fixed-output mode across -40°C to +125°C and full line/load conditions, as specified in the Electrical Characteristics table under VOUT_5V parameter. This tolerance is guaranteed by design and tested per AEC-Q100 stress conditions.
Does MAX16935RAUE/V+GE require an external Schottky diode, and why?
Yes, MAX16935RAUE/V+GE requires an external Schottky diode connected from LX to AGND. Although it integrates high- and low-side MOSFETs, the diode improves light-load efficiency and ensures reliable operation during discontinuous conduction mode - a requirement explicitly stated in the General Description and Pin Descriptions sections of the datasheet.
How does the FSYNC pin configure FPWM vs. skip mode on MAX16935RAUE/V+GE?
On MAX16935RAUE/V+GE, connecting FSYNC to AGND enables skip mode for lowest quiescent current, while connecting FSYNC to BIAS or an external clock forces fixed-frequency PWM (FPWM) mode. This pin-selectable behavior is confirmed in the Applications Information section and enables EMI optimization without changing hardware layout.
What thermal derating applies to MAX16935RAUE/V+GE in its TQFN-EP package?
MAX16935RAUE/V+GE in the 5mm × 5mm TQFN-EP package has a junction-to-ambient thermal resistance (θJA) of 35°C/W. Its continuous power dissipation derates at 28.6mW/°C above +70°C ambient, yielding 2285.7mW maximum at TA = +70°C - values verified in the Absolute Maximum Ratings and Package Thermal Characteristics tables.
Is MAX16935RAUE/V+GE pin-compatible with other variants in the MAX16935/MAX16939 family?
Yes, MAX16935RAUE/V+GE shares identical pinout and footprint with all MAX16935 and MAX16939 variants in the TQFN-EP package, including MAX16935BAUE/V+, MAX16939RAUE/V+, and MAX16939BAUE/V+. This compatibility is confirmed by the unified Pin Configurations diagram and Pin Descriptions table covering both families.
MAX16935RAUE/V+GE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- 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+GE FAQ
1.How can I place an order for MAX16935RAUE/V+GE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16935RAUE/V+GE 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+GE reliable?
The price and inventory of MAX16935RAUE/V+GE 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+GE is usually 5 days.
3.What payment methods are accepted for MAX16935RAUE/V+GE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16935RAUE/V+GE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16935RAUE/V+GE?
MAX16935RAUE/V+GE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16935RAUE/V+GE 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+GE?
For technical support, including MAX16935RAUE/V+GE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16935RAUE/V+GE requirements.
6.How does Aetrix verify that MAX16935RAUE/V+GE is sourced from the original manufacturer or authorized distributors?
All MAX16935RAUE/V+GE 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+GE meets industry standards.
7.What is the process for return or replacement of MAX16935RAUE/V+GE?
All MAX16935RAUE/V+GE units undergo pre-shipment inspection (PSI). If there is an issue with MAX16935RAUE/V+GE, 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+GE part is unused and in its original packaging.
Return procedure for MAX16935RAUE/V+GE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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