My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX16935RAUE/V+
- Part No.:
- MAX16935RAUE/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16935RAUE/V+.pdf
- Description:
- IC REG BUCK ADJ/1V 3.5A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,032
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX16935RAUE/V+ 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% accuracy), 28µA no-load quiescent current, and 2.2MHz switching frequency - deployed in navigation head units and RF-sensitive infotainment systems.
For engineers reviewing the MAX16935RAUE/V+ datasheet, MAX16935RAUE/V+ pinout, MAX16935RAUE/V+ application, or MAX16935RAUE/V+ equivalent, key selection criteria include AEC-Q100 qualification, 98% max duty cycle for cold-crank support, FPWM/skip mode control via FSYNC, 180° out-of-phase SYNCOUT for cascaded supplies, and thermal shutdown with automatic recovery.
Technical Context
The MAX16935RAUE/V+ implements a current-mode control architecture with resistor-programmable oscillator (220kHz–2.2MHz) and external clock synchronization capability via FSYNC. It integrates both high-side (100mΩ typical RDS(on)) and low-side (1.5Ω typical RDS(on)) MOSFETs and requires an external Schottky diode for optimal light-load efficiency.
It features automatic LX slew-rate adjustment (4ns at >1.1MHz, 8ns at <1.1MHz), spread-spectrum modulation (±6%, factory-enabled in S-version), and dual-supply inputs (SUP for logic, SUPSW for switch) enabling operation down to 3.5V during undervoltage transients while maintaining 98% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V (42V transient tolerant); supports automotive cold-crank and load-dump conditions without external protection. |
| Output Current | 3.5A continuous; enables single-chip 5V/3.3V PoL for microcontrollers, sensors, and RF transceivers in ADAS modules. |
| Quiescent Current | 28µA at no load; meets stringent automotive standby power budgets for always-on systems. |
| Switching Frequency | Resistor-programmable 220kHz–2.2MHz; higher frequencies reduce inductor size and output capacitance requirements. |
| Output Voltage Accuracy | ±2% over -40°C to +125°C; ensures stable 5V rail for CAN transceivers and audio codecs under temperature stress. |
| Duty Cycle Max | 98%; sustains regulated output during deep undervoltage events (e.g., engine cranking at 3.5V). |
| Thermal Protection | 175°C shutdown with 15°C hysteresis; enables robust operation in sealed automotive enclosures. |
Pinout & Package
MAX16935RAUE/V+ is housed in a 16-pin, 5mm × 5mm TQFN-EP package with exposed pad connected to PGND for thermal management. Pin count, layout, and thermal resistance (θJA = 35°C/W) are validated per JEDEC51 on multilayer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – SYNCOUT | Open-drain clock output | Provides 180° out-of-phase signal relative to internal oscillator; used to synchronize cascaded converters and minimize ripple summation. |
| 2 – FSYNC | Mode-select & sync input | Logic-controlled: AGND = skip mode; BIAS or external clock = forced PWM; enables EMI control in RF-sensitive designs. |
| 3 – FOSC | Oscillator frequency setting | Connects to AGND via resistor (e.g., 12kΩ for 2.2MHz); sets switching frequency and triggers automatic slew-rate optimization. |
| 4 – OUT | Regulated output node | Delivers 5V (fixed) or adjustable 1V–10V; powers downstream circuitry and supplies internal bias when VOUT ≥ 3V. |
| 5 – FB | Feedback input | Monitors output via resistive divider; regulation point is 1.0V ±1.5% - enables precise 5V (FB tied to BIAS) or custom voltages. |
| 6 – COMP | Error amplifier output | Drives external RC compensation network; stabilizes loop response across line/load/temperature variations. |
| 7 – BIAS | Integrated 5V LDO output | Powers internal analog blocks; requires 1µF ceramic bypass to AGND; UVLO threshold is 3.15V (typ) with 650mV hysteresis. |
| 8 – AGND | Analog ground reference | Separate from PGND; must be star-connected to minimize noise coupling into feedback and oscillator circuits. |
| 9 – BST | Bootstrap supply for high-side gate | Requires 0.1µF capacitor between BST and LX; enables efficient high-side MOSFET drive without external charge pump. |
| 10 – EN | Enable input | 3.3V–42V compatible; 2.4V high-threshold with 0.2V hysteresis; allows direct connection to KL30 or CAN transceiver INH pin. |
| 11 – SUP | Main supply input | Powers internal LDO (BIAS); bypassed with 4.7µF ceramic to PGND; supports RC filter for noise reduction. |
| 12 – SUPSW | Switch supply input | Powers internal power switches; bypassed with 0.1µF + 4.7µF ceramics to PGND; independent of SUP for improved PSRR. |
| 13/14 – LX | Switching node | Connects to external Schottky diode cathode and inductor; peak voltage reaches up to VSUPSW + 0.3V; requires careful layout for EMI. |
| 15 – PGND | Power ground | High-current return path for LX, SUPSW, and output capacitor; must be low-impedance plane connected to EP. |
| 16 – PGOOD | Open-drain power-good flag | Asserts high when VOUT ≥ 95% of regulation; deasserts at ≤92%; enables safe sequencing with microcontrollers and PMICs. |
| EP – Exposed Pad | Thermal & electrical ground | Must be soldered to large contiguous copper area tied to PGND; not a substitute for pin-level PGND connections. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3.5A High-Side + Low-Side MOSFETs | Eliminates external power switches and reduces BOM count by ≥4 components versus discrete controller solutions. |
| 180° Out-of-Phase SYNCOUT | Enables interleaved operation of two MAX16935RAUE/V+ devices to halve input/output ripple and increase total power capacity. |
| Automatic LX Slew-Rate Adjustment | Optimizes EMI vs. efficiency trade-off: 4ns rise time at 2.2MHz, 8ns at 400kHz - no manual gate-resistor tuning required. |
| AEC-Q100 Qualified (-40°C to +125°C) | Validated for automotive powertrain and body electronics; includes thermal shutdown, OVP, and cycle-by-cycle current limiting. |
| Fixed-Frequency FPWM + Skip Mode | FSYNC pin selects between EMI-critical fixed-frequency operation (RF transceivers) and efficiency-optimized skip mode (standby). |
Applications
| Navigation Head Unit Power Supply | Automotive Infotainment SoC Core Rail |
|---|---|
|
Use Scenario: Powers display processor, touchscreen controller, and GPS module in vehicle navigation systems operating across battery voltage transients (3.5V–16V). IC Role / Device Role / Timing Role: Primary 5V PoL regulator delivering 3.5A with 28µA quiescent current to meet ISO 16750-2 cold-crank requirements. Use Value: 98% max duty cycle maintains regulation during engine start; PGOOD enables safe boot sequencing with application processor. |
Use Scenario: Supplies core voltage to ARM-based infotainment SoCs requiring tight ripple (<20mVpp) and fast transient response in RF-dense cabin environments. IC Role / Device Role / Timing Role: Synchronous buck converter operating in forced-PWM mode (via FSYNC) to eliminate frequency variation and suppress conducted EMI. Use Value: Spread-spectrum modulation (±6%) and 180° SYNCOUT enable cascaded design that cuts input ripple by 50% versus single-phase operation. |
| ADAS Camera Module Power | Telematics Control Unit (TCU) Subsystem |
|
Use Scenario: Powers image sensor, ISP, and MIPI interface in rear-view or surround-view camera modules exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: Automotive-grade DC-DC with AEC-Q100 qualification and -40°C to +125°C operation supporting junction temperatures up to +150°C. Use Value: Thermal shutdown with automatic recovery prevents latch-up during sustained high ambient; BIAS LDO powers internal logic independently of output load. |
Use Scenario: Generates 5V rail for LTE modem, GNSS receiver, and CAN FD transceiver in telematics gateways requiring always-on connectivity and low sleep current. IC Role / Device Role / Timing Role: High-efficiency step-down converter with 28µA no-load IQ and EN pin compatible with 3.3V logic or KL30 battery rail. Use Value: Skip mode reduces standby power consumption below 30µA; PGOOD and SYNCOUT support coordinated power-up with cellular baseband processor. |
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+ | Lower overvoltage protection threshold (105% vs. 107% of VFB); identical pinout, package, and electrical specs otherwise. | Better suited for systems requiring tighter OVP clamping (e.g., sensitive ADC references or flash memory interfaces). | Select MAX16939RAUE/V+ only if tighter OVP is explicitly required; MAX16935RAUE/V+ remains preferred for general-purpose 5V automotive rails. |
| LM61480QRNXTQ1 | 4.5A rating, 3.5V–36V input, 12µA IQ, but no integrated low-side MOSFET - requires external diode or synchronous rectifier controller. | Lacks 180° SYNCOUT and automatic slew-rate control; offers higher current but less integration and fewer automotive-specific features. | Choose LM61480QRNXTQ1 only when >3.5A output or lower IQ is critical; MAX16935RAUE/V+ provides superior integration and EMI control for compact layouts. |
Compared with MAX16939RAUE/V+, the MAX16935RAUE/V+ offers higher OVP threshold tolerance and identical thermal/EMI performance; versus LM61480QRNXTQ1, it delivers full integration (HS+LS FETs), SYNCOUT, and AEC-Q100-compliant feature set in same 5mm×5mm footprint - reducing design risk and layout complexity for automotive PoL.
Availability
MAX16935RAUE/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MAX16935RAUE/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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX16935/MAX16939 product line was engineered specifically for automotive power conversion - emphasizing ultra-low IQ, wide VIN range, AEC-Q100 qualification, and EMI-hardened features like spread-spectrum and SYNCOUT.
FAQ
What is the maximum duty cycle supported by the MAX16935RAUE/V+?
The MAX16935RAUE/V+ supports up to 98% maximum duty cycle, enabling regulation during severe undervoltage transients such as automotive cold-crank events where input drops to 3.5V. This capability is confirmed in the Electrical Characteristics table and validated across the full -40°C to +125°C operating range. The MAX16935RAUE/V+ achieves this without external components, leveraging its dual-supply architecture (SUP/SUPSW) and adaptive control loop.
Does the MAX16935RAUE/V+ require an external Schottky diode?
Yes, the MAX16935RAUE/V+ requires an external Schottky diode connected between LX and AGND, even though it integrates both high-side and low-side MOSFETs. This is explicitly stated in the General Description and Detailed Description sections of the datasheet. The diode improves light-load efficiency and supports operation across the full 3.5A load range - the internal low-side MOSFET alone is insufficient for full-power conduction.
How is the output voltage set on the MAX16935RAUE/V+?
The MAX16935RAUE/V+ supports fixed 5V output (±2% accuracy) by connecting FB directly to BIAS, or adjustable 1V–10V output using an external resistive divider from OUT to FB to AGND. The feedback regulation voltage is precisely 1.0V (min 0.99V, max 1.015V), and the datasheet provides exact formulas for calculating RFB1 and RFB2. No trimming or calibration is required - the MAX16935RAUE/V+ achieves this accuracy across temperature and line variations.
What is the purpose of the SYNCOUT pin on the MAX16935RAUE/V+?
The SYNCOUT pin on the MAX16935RAUE/V+ provides an open-drain, 180° out-of-phase clock signal relative to the internal oscillator. It is used to synchronize multiple MAX16935RAUE/V+ devices in interleaved configurations, reducing input/output ripple and increasing total system power capacity. The datasheet specifies use of a 100Ω–1kΩ pull-up resistor to OUT for 2MHz operation, and confirms this function is active in both FPWM and skip modes.
Is the MAX16935RAUE/V+ qualified for automotive applications?
Yes, the MAX16935RAUE/V+ is AEC-Q100 qualified for automotive applications and operates over the full -40°C to +125°C junction temperature range. It includes automotive-specific protections: 42V input transient tolerance, thermal shutdown with automatic recovery, cycle-by-cycle current limiting, and overvoltage protection. These qualifications and features are documented in the Benefits and Features section and Absolute Maximum Ratings table of the official datasheet.
MAX16935RAUE/V+ 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:
- Active
- 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+ FAQ
1.How can I place an order for MAX16935RAUE/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16935RAUE/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 MAX16935RAUE/V+ reliable?
The price and inventory of MAX16935RAUE/V+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX16935RAUE/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16935RAUE/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16935RAUE/V+?
MAX16935RAUE/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16935RAUE/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 MAX16935RAUE/V+?
For technical support, including MAX16935RAUE/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16935RAUE/V+ requirements.
6.How does Aetrix verify that MAX16935RAUE/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16935RAUE/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 MAX16935RAUE/V+ meets industry standards.
7.What is the process for return or replacement of MAX16935RAUE/V+?
All MAX16935RAUE/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16935RAUE/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 MAX16935RAUE/V+ part is unused and in its original packaging.
Return procedure for MAX16935RAUE/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16935RAUE/V+ Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
