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Analog Devices Inc./Maxim Integrated MAX16907RATE/V+CMF
- Part No.:
- MAX16907RATE/V+CMF
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX16907RATE/V+CMF.pdf
- Description:
- IC REG STEP-DOWN CONV
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Product details
Overview
MAX16907RATE/V+CMF from Maxim Integrated is a 3A, current-mode, automotive-grade step-down DC-DC converter with integrated 70mΩ high-side MOSFET, operating from 3.5V to 36V input and delivering 5V fixed or 1V–10V adjustable output. It features 30µA standby current, 2.2MHz switching frequency (adjustable 1–2.2MHz), and operates across –40°C to +125°C for engine control units and ADAS power rails.
For engineers reviewing the MAX16907RATE/V+CMF datasheet, MAX16907RATE/V+CMF pinout, MAX16907RATE/V+CMF application, or MAX16907RATE/V+CMF equivalent, key selection criteria include its 42V transient tolerance, 98% max duty cycle during cold-crank, spread-spectrum EMI reduction (factory-enabled), and dual-supply architecture (SUP/SUPSW) enabling stable operation under undervoltage transients.
Technical Context
The MAX16907RATE/V+CMF implements a constant-frequency current-mode control architecture with internal transconductance error amplifier (gm = 900µS), 80ns minimum on-time, and fast load-transient response optimized via integrator-loop enhancement. Its dual-input supply (SUP for bias LDO, SUPSW for high-side switch) decouples regulation integrity during input sags.
It supports resistor-programmed oscillator (RFOSC = 12kΩ → 2.2MHz), external clock synchronization (FSYNC), and skip-mode operation below 300mA load. Protection includes overvoltage lockout (110% VFB), thermal shutdown at +175°C with 15°C hysteresis, and automatic-recovery overcurrent limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports wide automotive battery range including cold-crank (≥9V) and load-dump (≤42V transient) |
| Output Current | 3A continuous - enables single-chip 5V/3A rail for microcontrollers, sensors, and CAN transceivers |
| Switching Frequency | 2.2MHz (typ, RFOSC = 12kΩ) - allows compact 2.2µH inductor and reduces EMI fundamental above AM band |
| Quiescent Current | 30µA (standby, VOUT = 5V) - extends battery life in always-on vehicle modules like telematics and alarm systems |
| Output Voltage Options | 5V fixed (FB tied to BIAS) or 1V–10V adjustable - eliminates external feedback resistors for standard 5V rails |
| High-Side RDS(on) | 70mΩ (typ) - minimizes conduction loss at 3A, enabling >90% efficiency at 14V→5V/2A |
| Thermal Shutdown | +175°C with 15°C hysteresis - ensures safe recovery after sustained overload without manual reset |
Pinout & Package
MAX16907RATE/V+CMF is housed in a 16-pin TQFN package (5mm × 5mm) with exposed pad (EP) for thermal dissipation. The package supports JEDEC-standard reflow and achieves 35°C/W junction-to-ambient thermal resistance on a 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FSYNC) | External clock sync input | Accepts 10% higher-frequency clock to synchronize switching; must be grounded if internal oscillator used |
| 2 (FOSC) | Oscillator frequency setting | Resistor-to-GND sets fSW from 1–2.2MHz; 12kΩ yields 2.2MHz for minimal inductor size |
| 3 (PGOOD) | Open-drain power-good monitor | Asserts low when VOUT drops below 92.5% of regulation; enables safe power sequencing with downstream ICs |
| 4 (OUT) | Switch-regulator output node | Delivers regulated voltage; powers internal circuitry in standby when VOUT = 3–5.5V |
| 5 (FB) | Feedback input | Tied to BIAS for 5V fixed output; connected to resistive divider for 1–10V adjustment (VFB = 1.0V) |
| 6 (COMP) | Error amplifier output | Connects to RC compensation network; sets loop stability and transient response bandwidth |
| 7 (BIAS) | Internal 5V LDO output | Powers internal logic; requires 1µF ceramic bypass to GND for noise immunity and startup reliability |
| 8 (GND) | Analog/digital ground reference | Primary return path; EP must be soldered to large copper pour but not used as sole GND connection |
| 9 (BST) | Bootstrap capacitor terminal | Requires 0.1µF capacitor between BST and LX to drive high-side MOSFET gate above input rail |
| 10 (SUP) | Bias supply input | Powers internal LDO; requires ≥4.7µF ceramic capacitor to GND for ripple suppression |
| 11–12 (LX) | Switching node | Connects to inductor and Schottky diode cathode; high dv/dt node requiring short PCB routing |
| 13–14 (SUPSW) | High-side switch supply | Powers internal MOSFET driver; requires 0.1µF + 4.7µF ceramic decoupling to GND |
| 15 (EN) | Enable input | Logic-compatible with 3.3V/5V/KL30; high-voltage tolerant up to 42V; pulls device into 5µA shutdown when low |
| 16 (I.C.) | Internally connected | Must be connected to GND per datasheet; no active function; floating violates layout requirements |
| EP | Exposed thermal pad | Connected to GND plane for thermal relief; contributes ~70% of total heat dissipation in TQFN package |
Key Features
| Feature | Design Value |
|---|---|
| 42V Input Transient Tolerance | Withstands automotive load-dump events without latch-up or damage, eliminating need for upstream TVS clamping |
| 98% Max Duty Cycle | Maintains regulation during cold-crank (e.g., 6V input → 5V output) by extending on-time beyond typical buck limits |
| Spread Spectrum (Factory-Enabled) | ±6% triangular modulation at 400µs period reduces peak EMI by >10dB without affecting regulation accuracy |
| Fast Load-Transient Response | Recovers from 0.1A→3A step within 100µs with <50mV undershoot - protects sensitive SoCs and ADCs |
| Power-Good Monitor with Debounce | 35µs typical debounce prevents false PGOOD toggling during line/load transients; simplifies system power sequencing |
| Integrated 3A High-Side Switch | Eliminates external MOSFET and gate driver, reducing BOM count and PCB area while ensuring matched timing |
Applications
| Automotive Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Powers 32-bit MCU, CAN transceiver, and analog front-end in under-hood ECU exposed to –40°C to +125°C ambient and 42V load-dump transients. IC Role / Device Role / Timing Role: Primary 5V/3A power rail generator with cold-crank support and PGOOD sequencing signal. Use Value: Enables single-chip solution replacing discrete buck controller + MOSFET, reducing footprint by 40% and eliminating external current-sense resistor. |
Use Scenario: Supplies vision processor and radar SoC in forward-facing camera module requiring ultra-low quiescent current during sleep mode. IC Role / Device Role / Timing Role: Always-on 5V rail with 30µA standby current and fast wake-up (<10ms) from EN assertion. Use Value: Extends vehicle battery life during parking mode; spread spectrum meets CISPR-25 Class 5 radiated emissions limits without shielding. |
| Industrial Vehicle Telematics | Railway Onboard Monitoring System |
Use Scenario: Powers GPS/GSM module and secure element in fleet-tracking device operating across 9–36V battery input with vibration and thermal cycling. IC Role / Device Role / Timing Role: Input-tolerant DC-DC stage converting wide-range battery to stable 5V for communication ICs. Use Value: Dual-supply architecture (SUP/SUPSW) maintains regulation during 100ms undervoltage dips; TQFN package withstands mechanical shock. |
Use Scenario: Generates 5V for microcontroller and isolated RS-485 transceivers in train diagnostic unit subjected to EN 50155 compliance testing. IC Role / Device Role / Timing Role: High-reliability point-of-load regulator with thermal shutdown recovery and 125°C junction rating. Use Value: Eliminates need for external thermal monitoring circuit; exposed pad ensures 150°C+ operation margin under full load at +70°C ambient. |
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 | 4.5–36V input, 8A output, 2.1MHz fixed freq, no spread spectrum, 15µA IQ | Higher current capability but larger solution size; lacks cold-crank duty-cycle extension | Select for higher-output-current needs where 98% duty cycle is not required |
| TPS62933RQYR | 3–36V input, 3A output, 2.2MHz, 15µA IQ, no FSYNC, no BIAS LDO | Lower IQ but requires external bias supply; no integrated 5V LDO for internal circuitry | Select for space-constrained designs where external bias generation is acceptable |
Compared with LM61480RQR and TPS62933RQYR, the MAX16907RATE/V+CMF uniquely combines cold-crank robustness (98% duty cycle), factory-enabled spread spectrum, and integrated BIAS LDO-making it optimal for automotive ECU and ADAS power rails where input transients, EMI, and self-powered operation are critical.
Availability
MAX16907RATE/V+CMF is available at Aetrix Electronics and suitable for automotive ECU, ADAS camera modules, and industrial telematics requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for MAX16907RATE/V+CMF 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, emphasizing reliability, integration, and ruggedized operation.
The MAX16907RATE/V+CMF belongs to Maxim's automotive power management portfolio, engineered specifically for harsh-environment DC-DC conversion in engine compartments and safety-critical subsystems.
FAQ
What is the maximum input voltage transient the MAX16907RATE/V+CMF can withstand?
The MAX16907RATE/V+CMF tolerates input transients up to 42V for durations less than 1 second, as specified in its Absolute Maximum Ratings. This capability enables direct connection to automotive batteries without additional TVS protection during load-dump events, and is validated per ISO 7637-2 Pulse 5a requirements. The device remains functional and does not latch up under these conditions.
Does the MAX16907RATE/V+CMF support external frequency synchronization?
Yes, the MAX16907RATE/V+CMF supports external clock synchronization via its FSYNC pin. The external clock must exceed the internal oscillator frequency by at least 10% (e.g., >2.42MHz for nominal 2.2MHz operation). When synchronized, the internal spread-spectrum feature is disabled, but the device retains all regulation, protection, and sequencing functions.
How does the MAX16907RATE/V+CMF achieve 98% duty cycle during cold-crank conditions?
The MAX16907RATE/V+CMF achieves 98% duty cycle by dynamically extending the high-side switch on-time beyond conventional buck limitations, enabled by its dual-supply architecture (SUP and SUPSW). During cold-crank (e.g., 6V input), SUPSW sustains gate drive while the control loop maintains regulation - a feature confirmed in the datasheet's Detailed Description section and validated in Typical Operating Characteristics Figure toc11.
What is the purpose of the I.C. pin on the MAX16907RATE/V+CMF?
The I.C. pin (Pin 16) on the MAX16907RATE/V+CMF is internally connected and must be externally tied to GND per the Pin Descriptions table. It has no active circuit function but serves as a mandatory grounding point for proper internal biasing and thermal performance. Leaving it unconnected violates the recommended layout and may cause startup failure or erratic regulation.
Can the MAX16907RATE/V+CMF operate with a 3.3V input supply?
No, the MAX16907RATE/V+CMF has a minimum input voltage of 3.5V on both SUP and SUPSW pins, as stated in the Electrical Characteristics table. Operation below 3.5V is not guaranteed and may result in failure to regulate or enable - this limit is enforced by the internal UVLO circuitry on the BIAS regulator (VUVBIAS = 2.9–3.3V).
MAX16907RATE/V+CMF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX16907RATE/V+CMF FAQ
1.How can I place an order for MAX16907RATE/V+CMF through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16907RATE/V+CMF 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 MAX16907RATE/V+CMF reliable?
The price and inventory of MAX16907RATE/V+CMF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16907RATE/V+CMF is usually 5 days.
3.What payment methods are accepted for MAX16907RATE/V+CMF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16907RATE/V+CMF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16907RATE/V+CMF?
MAX16907RATE/V+CMF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16907RATE/V+CMF 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 MAX16907RATE/V+CMF?
For technical support, including MAX16907RATE/V+CMF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16907RATE/V+CMF requirements.
6.How does Aetrix verify that MAX16907RATE/V+CMF is sourced from the original manufacturer or authorized distributors?
All MAX16907RATE/V+CMF 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 MAX16907RATE/V+CMF meets industry standards.
7.What is the process for return or replacement of MAX16907RATE/V+CMF?
All MAX16907RATE/V+CMF units undergo pre-shipment inspection (PSI). If there is an issue with MAX16907RATE/V+CMF, 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 MAX16907RATE/V+CMF part is unused and in its original packaging.
Return procedure for MAX16907RATE/V+CMF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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