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Analog Devices Inc./Maxim Integrated MAX16935BAUER/V+
- Part No.:
- MAX16935BAUER/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16935BAUER/V+.pdf
- Description:
- IC REG BUCK ADJ/1V 3.5A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,870
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Product details
Overview
MAX16935BAUER/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%), 28µA no-load quiescent current, and 2.2MHz switching frequency - used in navigation head units and RF-sensitive infotainment systems.
For engineers reviewing the MAX16935BAUER/V+ datasheet, MAX16935BAUER/V+ pinout, MAX16935BAUER/V+ application, or MAX16935BAUER/V+ equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade thermal and protection behavior, and real-world selection guidance for AEC-Q100-compliant 12V/24V system designs.
Technical Context
The MAX16935BAUER/V+ 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 operation: skip mode for light-load efficiency or forced-PWM (FPWM) via FSYNC to suppress EMI in RF transceiver supplies. It integrates a 5V BIAS LDO and supports 98% duty cycle during cold-crank undervoltage events.
Its dual supply inputs (SUP/SUPSW), 180° out-of-phase SYNCOUT for cascaded converters, cycle-by-cycle current limiting, thermal shutdown at +175°C with 15°C hysteresis, and open-drain PGOOD with 95%/92% regulation thresholds enable robust sequencing and fault handling in automotive environments operating from –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V (42V transient tolerant); supports automotive battery rail including cold-crank (≥3.5V) and load-dump (≤42V, <1s). |
| Output Current | 3.5A continuous RMS; enables single-chip 5V/3.5A PoL for ADAS camera modules or display controllers. |
| Quiescent Current | 28µA at no load; meets automotive standby power budgets without external biasing. |
| Switching Frequency | Resistor-programmable 220kHz–2.2MHz; 2.2MHz operation allows compact 2.2µH inductors and reduces EMI filter size. |
| Output Voltage Accuracy | ±2% over –40°C to +125°C for 5V fixed output; ensures stable MCU core voltage under thermal stress. |
| Thermal Protection | Auto-recovery thermal shutdown at +175°C (typ), 15°C hysteresis; prevents latch-up during sustained overload. |
| Power-Good Threshold | PGOOD asserts at 95% VFB, deasserts at 92% VFB; enables precise sequencing with downstream processors. |
Pinout & Package
MAX16935BAUER/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 metrics match JEDEC MS-012AC (TQFN-16) standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SYNCOUT | Open-drain clock output | Delivers 180° out-of-phase signal relative to internal oscillator; enables synchronized multi-phase buck stacks without external logic. |
| 2 - FSYNC | Mode-select synchronization input | Logic-level control: AGND = skip mode; BIAS or external clock = FPWM; enables EMI-critical RF supply stability. |
| 3 - FOSC | Frequency-setting resistor input | Connects to AGND via RFOSC (e.g., 12kΩ for 2.2MHz); sets switching frequency across full 220kHz–2.2MHz range. |
| 4 - OUT | Regulated output node | Delivers 5V fixed output; powers internal circuitry when VOUT ≥3V; requires 22µF ceramic output capacitance. |
| 5 - FB | Feedback input | Connected to BIAS for 5V fixed output; for adjustable outputs (1V–10V), tied to resistive divider from OUT to AGND. |
| 9 - BST | High-side gate driver supply | Requires 0.1µF capacitor between BST and LX; enables bootstrap operation of integrated high-side MOSFET. |
| 10 - EN | Enable input | 3.3V–42V compatible; drives device into shutdown (5µA ISHDN) when pulled low; supports direct KL30 connection. |
| 11 - SUP | Main supply input | Powers internal LDO (BIAS); bypassed with 4.7µF ceramic to PGND; handles full 3.5V–36V input range. |
| 12 - SUPSW | Switch supply input | Powers internal power stage; bypassed with 0.1µF + 4.7µF ceramics to PGND; decouples switch noise from logic supply. |
| 13/14 - LX | Switching node | Connects to Schottky diode cathode and inductor; peak current rating 6.2A; requires careful layout for EMI control. |
| 15 - PGND | Power ground | Dedicated low-impedance return path for high-current LX loop; must be separated from AGND except at single-point EP tie. |
| 16 - PGOOD | Open-drain power-good output | Active-low; asserts when VOUT ≥95% regulation; pulls up to BIAS via 10kΩ; enables safe processor reset sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3.5A high-side + low-side MOSFETs | Eliminates external power switches and gate drivers; reduces BOM count by ≥6 components vs. controller-based solutions. |
| 180° out-of-phase SYNCOUT | Enables interleaved operation with second MAX16935BAUER/V+ to halve input/output ripple and double effective current capability. |
| Automatic LX slew-rate control | Adjusts HSFET turn-on time to 4ns (2.2MHz) or 8ns (<1.1MHz); optimizes EMI vs. efficiency trade-off without manual tuning. |
| AEC-Q100 qualified (Grade -40°C to +125°C) | Validated for automotive powertrain and body electronics; includes production testing for HTOL, TC, and ESD per AEC-Q100 Rev H. |
| Fixed 5V output with ±2% accuracy | Meets tight tolerance requirements for microcontroller I/O and memory interfaces without external feedback compensation. |
Applications
| Navigation Head Units | RF Transceiver Power Supplies |
|---|---|
|
Use Scenario: Powering LCD display, touch controller, and audio codec in automotive infotainment head units with 12V battery input subject to cold-crank and load-dump transients. IC Role / Device Role / Timing Role: Primary 5V PoL regulator delivering 3.5A continuous current; manages undervoltage hold-up via 98% max duty cycle during cranking. Use Value: Maintains system operation down to 3.5V input while consuming only 28µA in standby - extending key-off battery life. |
Use Scenario: Supplying clean, low-noise 5V power to LTE/Wi-Fi transceivers in telematics control units where EMI emissions must meet CISPR 25 Class 5 limits. IC Role / Device Role / Timing Role: Fixed-frequency forced-PWM (FPWM) regulator synchronized via FSYNC to eliminate spectral spreading and enable predictable filtering. Use Value: Enables compliance with strict radiated emission standards without adding complex shielding or ferrite beads. |
| ADAS Camera Modules | Industrial Control HMIs |
|
Use Scenario: Providing regulated 5V power to image sensors and ISP processors in rear-view and surround-view camera ECUs exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: Automotive-grade buck converter with thermal shutdown at +175°C and auto-recovery; operates continuously from –40°C to +125°C ambient. Use Value: Eliminates need for external thermal monitoring circuitry while ensuring fail-safe shutdown before silicon damage occurs. |
Use Scenario: Powering ARM-based HMI controllers in factory automation panels with wide-input 24V DC industrial rails prone to brownouts and surges. IC Role / Device Role / Timing Role: Robust step-down regulator with 42V transient tolerance, PGOOD sequencing, and 95%/92% power-good window for deterministic boot timing. Use Value: Guarantees reliable startup and graceful shutdown during line disturbances common in motor-driven industrial 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 |
|---|---|---|---|
| MAX16939BAUER/V+ | Lower OVP threshold (105% vs. 107% for MAX16935); identical pinout, specs, and package. | Better suited for systems requiring tighter overvoltage clamping on 5V rail (e.g., FPGA I/O banks). | Select MAX16939BAUER/V+ when tighter OVP response is required; otherwise MAX16935BAUER/V+ offers broader margin. |
| LM61480QRNXTQ1 | 4.5A rated, 3.5V–36V input, 2.1MHz max fSW, 15µA IQ; no integrated low-side FET or SYNCOUT phase-shift. | Lacks 180° SYNCOUT and FPWM/skip mode selection; requires external low-side switch for full efficiency. | Choose LM61480QRNXTQ1 only if higher current (4.5A) is mandatory and SYNCOUT/cascading capability is not needed. |
Compared with MAX16939BAUER/V+, the MAX16935BAUER/V+ provides higher overvoltage protection threshold (107% vs. 105%) for enhanced safety margin, while both share identical thermal performance, pinout, and automotive qualification. Against LM61480QRNXTQ1, MAX16935BAUER/V+ delivers integrated low-side FET operation and cascading capability - reducing component count and enabling multi-rail coordination.
Availability
MAX16935BAUER/V+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera power, and industrial HMI applications requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MAX16935BAUER/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) designs high-performance analog, mixed-signal, and power-management ICs for automotive, industrial, and communications markets.
The MAX16935/MAX16939 product line targets automotive power conversion with integrated high-voltage buck regulators optimized for cold-crank resilience, low-IQ, and EMI-controlled operation in space-constrained ECUs.
FAQ
What is the maximum input voltage the MAX16935BAUER/V+ can withstand during load-dump events?
The MAX16935BAUER/V+ supports 42V transient input for ≤1 second during load-dump events, as specified in its Absolute Maximum Ratings. This rating applies to both SUP and SUPSW pins and is validated per ISO 7637-2 Pulse 5a. The device remains functional after such transients without latch-up or parameter shift, provided proper input capacitance (≥4.7µF ceramic) and layout practices are followed.
Does the MAX16935BAUER/V+ require an external Schottky diode, and why?
Yes, the MAX16935BAUER/V+ requires an external Schottky diode connected between LX and AGND. Although it integrates both high-side and low-side MOSFETs, the diode improves light-load efficiency and ensures reliable operation during boundary conduction mode. The diode also provides redundancy during low-side FET failure and supports the 98% duty cycle capability needed for cold-crank conditions.
How does the FSYNC pin control operation mode in the MAX16935BAUER/V+?
The FSYNC pin selects between skip mode and forced-PWM (FPWM) mode: connecting FSYNC to AGND enables skip mode for lowest quiescent current; connecting to BIAS or an external clock ≥1.8MHz enables FPWM for constant-frequency operation. The device synchronizes to the external clock within one cycle and reverts to internal oscillator if clock is absent for >2 cycles.
What is the purpose of the SYNCOUT pin on the MAX16935BAUER/V+?
The SYNCOUT pin delivers an open-drain 180° out-of-phase clock signal relative to the internal oscillator. It enables interleaved operation with a second MAX16935BAUER/V+ to reduce input/output ripple current by ~50%, increase total output current capability, and lower EMI peaks - without requiring external clock generators or phase-shifting circuitry.
Is the MAX16935BAUER/V+ pin-compatible with other devices in the MAX16935/MAX16939 family?
Yes, the MAX16935BAUER/V+ shares identical pinout, package (16-pin TQFN-EP), and electrical interface with all variants in the MAX16935/MAX16939 family, including MAX16935C, MAX16939BAUER/V+, and MAX16939C. Differences are limited to internal trimming (e.g., OVP threshold, soft-start time) and do not affect PCB layout or interconnect design.
MAX16935BAUER/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:
- 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
MAX16935BAUER/V+ FAQ
1.How can I place an order for MAX16935BAUER/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16935BAUER/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 MAX16935BAUER/V+ reliable?
The price and inventory of MAX16935BAUER/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16935BAUER/V+ is usually 5 days.
3.What payment methods are accepted for MAX16935BAUER/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16935BAUER/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16935BAUER/V+?
MAX16935BAUER/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16935BAUER/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 MAX16935BAUER/V+?
For technical support, including MAX16935BAUER/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16935BAUER/V+ requirements.
6.How does Aetrix verify that MAX16935BAUER/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16935BAUER/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 MAX16935BAUER/V+ meets industry standards.
7.What is the process for return or replacement of MAX16935BAUER/V+?
All MAX16935BAUER/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16935BAUER/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 MAX16935BAUER/V+ part is unused and in its original packaging.
Return procedure for MAX16935BAUER/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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