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Analog Devices Inc./Maxim Integrated MAX16936SATEA/V+
- Part No.:
- MAX16936SATEA/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX16936SATEA/V+.pdf
- Description:
- IC REG BUCK ADJ/1V 2.5A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,862
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Product details
Overview
MAX16936SATEA/V+ from Maxim Integrated is a 2.5A current-mode step-down DC-DC converter with integrated high-side and low-side MOSFETs, designed for automotive power supplies requiring 3.5V–36V input, 5V/3.3V fixed or 1V–10V adjustable output, 28µA no-load quiescent current, and AEC-Q100 qualification. It supports forced-PWM (FPWM) and skip modes, operates up to 98% duty cycle during cold-crank transients, and delivers stable regulation in navigation head units and RF-sensitive infotainment systems.
For engineers reviewing the MAX16936SATEA/V+ datasheet, MAX16936SATEA/V+ pinout, MAX16936SATEA/V+ application, or MAX16936SATEA/V+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade protection features (42V load-dump, thermal shutdown), exact switching frequency range (220kHz–2.2MHz), and real-world design implications of its 180° out-of-phase SYNCOUT and automatic LX slew-rate control.
Technical Context
The MAX16936SATEA/V+ implements a current-mode control architecture with resistor-programmable oscillator (FOSC pin), enabling precise frequency setting from 220kHz to 2.2MHz and external synchronization via FSYNC. Its dual supply inputs (SUP and SUPSW) decouple logic and power-switch domains, supporting operation down to 3.5V while maintaining 98% max duty cycle during undervoltage events.
It integrates a 5V BIAS linear regulator with auto-switching to OUT for self-powering above 3V output, a cycle-by-cycle current-limited high-side MOSFET (RON_H = 220mΩ max), and an open-drain PGOOD output with 95%/92% rising/falling thresholds referenced to FB. The 180° out-of-phase SYNCOUT enables cascaded multi-phase designs without external phase-shift circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports automotive battery rails including cold-crank (down to 3.5V) and load-dump (up to 42V transient) |
| Output Current | 2.5A continuous - peak inductor current limit of 3.75A ensures robust overload handling without foldback |
| Quiescent Current | 28µA at no load - enables always-on subsystems (e.g., CAN wake-up circuits) with minimal battery drain |
| Switching Frequency | 220kHz to 2.2MHz - resistor-programmable (FOSC) with external sync capability; higher frequencies reduce inductor size and output capacitance |
| Output Voltage Options | Fixed 5V (±2%) or 3.3V (±2%), or adjustable 1V–10V via FB divider - enables direct replacement of legacy LDOs with higher efficiency |
| Protection Features | Cycle-by-cycle current limit, thermal shutdown (175°C, 15°C hysteresis), 42V load-dump tolerance, and overvoltage protection (107% of VFB for MAX16936) |
| Operating Temperature | −40°C to +125°C - qualified per AEC-Q100 Grade 0, suitable for under-hood and dashboard-mounted ECUs |
Pinout & Package
MAX16936SATEA/V+ is housed in a 16-pin TSSOP-EP package with exposed pad (EP) connected to PGND for thermal management. Pin numbering follows standard TSSOP top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 / SYNCOUT | Open-drain clock output | 180° out-of-phase signal relative to internal oscillator; used to synchronize cascaded converters without external phase-shifting components |
| 2 / FSYNC | Mode selection & sync input | Logic-controlled: grounded → skip mode; tied to BIAS or external clock → FPWM; enables EMI-optimized fixed-frequency operation |
| 3 / FOSC | Frequency programming input | Resistor-to-AGND sets switching frequency; supports 220kHz–2.2MHz range with ±6% spread-spectrum option (factory-set) |
| 4 / OUT | Power output node | Delivers regulated DC output; also powers internal circuitry when VOUT is 3V–5.5V (BIAS auto-disables after regulation) |
| 5 / FB | Feedback input | Monitors output via resistive divider; 1.0V reference enables precise 1V–10V adjustment or direct tie to BIAS for 5V/3.3V fixed output |
| 6 / COMP | Error amplifier output | Connect RC compensation network here to stabilize loop response; critical for transient performance across full load and temperature range |
| 7 / BIAS | Internal 5V LDO output | Powers analog blocks; bypassed with 1µF capacitor; automatically disabled once OUT reaches regulation (3V–5.5V range) |
| 8 / AGND | Analog ground reference | Separate from PGND to minimize noise coupling into feedback and error amplifier paths |
| 9 / BST | High-side gate driver supply | Connected via 0.1µF capacitor to LX; supplies bootstrap voltage for high-side MOSFET drive during each switching cycle |
| 10 / EN | Enable input | 3.3V–42V compatible; logic-high enables device; internal UVLO (2.4V threshold) ensures clean startup during battery brownout |
| 11 / SUP | Logic supply input | Powers internal bias regulator; bypassed with 4.7µF ceramic capacitor; supports RC filter for noise suppression on sensitive logic rails |
| 12 / SUPSW | Switch supply input | Directly powers high-side MOSFET driver; bypassed with 0.1µF + 4.7µF ceramics to handle high di/dt transients at LX node |
| 13–14 / LX | Switching node | Connects to Schottky diode cathode and inductor; automatic slew-rate control (4ns/8ns) optimizes EMI vs. efficiency trade-off based on fSW |
| 15 / PGND | Power ground | Primary return path for high-current switch and output capacitor; must be low-impedance and thermally coupled to EP |
| 16 / PGOOD | Open-drain power-good | Active-low signal asserts when VOUT ≥95% of regulation; deasserts at ≤92%; enables safe power sequencing with microcontrollers and PMICs |
| EP | Exposed thermal pad | Must be soldered to large contiguous copper plane connected to PGND; not a functional signal - essential for thermal dissipation (TJ max = +150°C) |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.5A high-side + low-side MOSFETs | Eliminates external power switches and reduces BOM count; RON_H ≤220mΩ and RON_L ≤3Ω ensure <90% efficiency at 2A/5V output |
| 180° out-of-phase SYNCOUT | Enables two-stage cascaded buck conversion with interleaved operation - cuts input/output ripple by ~50% and reduces required bulk capacitance |
| Automatic LX slew-rate control | Adjusts high-side gate drive rise time (4ns @ >1.1MHz, 8ns @ <1.1MHz) to balance EMI reduction and conduction loss without manual tuning |
| Spread-spectrum modulation (factory-enabled) | ±6% frequency dither centered on FOSC reduces peak EMI emissions by 10dB; disabled only when synchronized to external clock |
| AEC-Q100 Grade 0 qualification | Validated for −40°C to +125°C operation with 42V load-dump immunity and 175°C thermal shutdown - meets automotive safety-critical power requirements |
Applications
| Navigation Head Units | RF Transceiver Power Supplies |
|---|---|
|
Use Scenario: Powering display controllers, GPS modules, and audio DSPs in automotive infotainment head units with wide battery voltage variation (5V–16V nominal, down to 3.5V cold crank). IC Role / Device Role / Timing Role: Primary 5V/3.3V point-of-load regulator delivering 2.5A with fast transient response and seamless dropout recovery. Use Value: 98% max duty cycle maintains regulation during engine start; 28µA quiescent current preserves battery life during vehicle sleep mode. |
Use Scenario: Supplying low-noise, fixed-frequency power to LTE/WiFi/BLE radio transceivers where spectral purity and EMI compliance are critical. IC Role / Device Role / Timing Role: Fixed-frequency forced-PWM (FPWM) regulator synchronized to system clock to eliminate variable switching noise in RF bands. Use Value: FSYNC-driven FPWM eliminates frequency jitter; spread-spectrum option further suppresses narrowband EMI peaks without affecting RF performance. |
| Distributed Automotive ECUs | Industrial Control Modules |
|
Use Scenario: Providing isolated 3.3V/5V rails to CAN/LIN gateway nodes, body control modules, and ADAS sensor interfaces in harsh under-hood environments. IC Role / Device Role / Timing Role: Robust buck converter with AEC-Q100 qualification, 42V load-dump protection, and thermal shutdown for long-term reliability. Use Value: Dual supply inputs (SUP/SUPSW) prevent latch-up during battery transients; PGOOD enables safe firmware-initiated power sequencing. |
Use Scenario: Powering programmable logic controllers (PLCs), motor drives, and industrial HMIs operating from unregulated 24V DC bus with wide ambient temperature swings. IC Role / Device Role / Timing Role: High-input-voltage buck regulator supporting 3.5V–36V range and −40°C to +125°C operation in factory automation equipment. Use Value: Adjustable 1V–10V output accommodates diverse FPGA I/O banks and analog sensor front-ends; TSSOP-EP package simplifies thermal layout on dense PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRTWRQ1 | 3.5A rated, 3.5V–36V input, but lacks integrated low-side MOSFET and 180° SYNCOUT; requires external diode or synchronous rectifier controller | Better suited for high-current (>2.5A), non-cascaded applications where footprint is less constrained and phase synchronization is unnecessary | Choose LM61480QRTWRQ1 if higher output current headroom is needed and cascaded power stages are not required. |
| TPS62933RTER | 3A rated, 3V–36V input, 15µA IQ, but only supports 2.2MHz max fSW and no load-dump rating; not AEC-Q100 qualified | Targeted at space-constrained industrial or consumer applications where automotive qualification and 42V transients are irrelevant | Choose TPS62933RTER for cost-sensitive, non-automotive designs prioritizing ultra-low IQ and small solution size over transient robustness. |
Compared with LM61480QRTWRQ1 and TPS62933RTER, MAX16936SATEA/V+ uniquely combines AEC-Q100 qualification, integrated low-side FET for FPWM light-load operation, 180° SYNCOUT for cascading, and 42V load-dump tolerance - making it the only choice for automotive-critical, multi-rail, EMI-sensitive power architectures.
Availability
MAX16936SATEA/V+ is available at Aetrix Electronics and suitable for automotive infotainment systems, distributed ECU power distribution, and industrial control modules requiring stable component supply, long lifecycle support, and guaranteed AEC-Q100 compliance.
Supply support for MAX16936SATEA/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 MAX16936/MAX16938 product line was engineered specifically for automotive power conversion - delivering high-efficiency, low-IQ, transient-hardened buck regulation with integrated protection and synchronization features for next-generation vehicle electronics.
FAQ
What is the maximum duty cycle supported by the MAX16936SATEA/V+?
The MAX16936SATEA/V+ supports a maximum duty cycle of 98%, enabling operation during severe undervoltage transients such as automotive cold-crank events (down to 3.5V input). This allows the device to maintain regulated output even when input voltage approaches the output level, minimizing dropout risk in safety-critical systems.
Does the MAX16936SATEA/V+ require an external Schottky diode?
Yes, the MAX16936SATEA/V+ requires an external Schottky diode connected between LX and PGND. Although it integrates both high-side and low-side MOSFETs, the diode is necessary to support the full 2.5A load range and ensure reliable operation in all modes, including skip mode and during startup/shutdown transitions.
How does the FSYNC pin affect operating mode selection in the MAX16936SATEA/V+?
The FSYNC pin selects between skip mode and forced-PWM (FPWM) operation: connecting FSYNC to AGND enables skip mode for highest light-load efficiency, while tying it to BIAS or an external clock forces fixed-frequency FPWM mode to minimize EMI variability - critical for RF-sensitive applications like automotive telematics.
What is the purpose of the SYNCOUT pin on the MAX16936SATEA/V+?
The SYNCOUT pin provides an open-drain 180° out-of-phase clock signal relative to the internal oscillator. This enables direct cascading of multiple MAX16936SATEA/V+ devices to create interleaved, multiphase buck converters - reducing input/output ripple, easing EMI filtering, and increasing total power capacity without complex external timing circuitry.
Is the MAX16936SATEA/V+ qualified for automotive use?
Yes, the MAX16936SATEA/V+ is AEC-Q100 Grade 0 qualified, rated for −40°C to +125°C operation, and tested for 42V load-dump immunity. It includes automotive-specific protections including thermal shutdown with hysteresis, cycle-by-cycle current limiting, and robust enable input compatibility with KL30/KL15 battery rails.
MAX16936SATEA/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN 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:
- 2.5A
- 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-TQFN (5x5)
MAX16936SATEA/V+ FAQ
1.How can I place an order for MAX16936SATEA/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16936SATEA/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 MAX16936SATEA/V+ reliable?
The price and inventory of MAX16936SATEA/V+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16936SATEA/V+ is usually 5 days.
3.What payment methods are accepted for MAX16936SATEA/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16936SATEA/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16936SATEA/V+?
MAX16936SATEA/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16936SATEA/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 MAX16936SATEA/V+?
For technical support, including MAX16936SATEA/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16936SATEA/V+ requirements.
6.How does Aetrix verify that MAX16936SATEA/V+ is sourced from the original manufacturer or authorized distributors?
All MAX16936SATEA/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 MAX16936SATEA/V+ meets industry standards.
7.What is the process for return or replacement of MAX16936SATEA/V+?
All MAX16936SATEA/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX16936SATEA/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 MAX16936SATEA/V+ part is unused and in its original packaging.
Return procedure for MAX16936SATEA/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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