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Analog Devices Inc./Maxim Integrated MAX16907SAUE+T
- Part No.:
- MAX16907SAUE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MAX16907SAUE+T.pdf
- Description:
- IC REG BUCK ADJ/1V 3A 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,473
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Product details
Overview
MAX16907SAUE+T 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 no-load quiescent 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 MAX16907SAUE+T datasheet, MAX16907SAUE+T pinout, MAX16907SAUE+T application, or MAX16907SAUE+T equivalent, key selection criteria include its 42V transient tolerance, 98% max duty cycle during cold-crank, spread-spectrum EMI reduction (S-version), PGOOD monitoring, and TSSOP-16 package with exposed pad for thermal management.
Technical Context
The MAX16907SAUE+T implements constant-frequency current-mode control with internal transconductance error amplifier (gm = 900µS), 80ns minimum on-time, and fast-loop architecture enabling stable regulation under ±3A load transients. Its dual-supply inputs (SUP and SUPSW) decouple bias and switch power paths, supporting high-duty-cycle operation during undervoltage events down to 3.5V.
It integrates a 5V/100mA linear regulator (BIAS) with 3.1V UVLO hysteresis, synchronization input (FSYNC) accepting external clocks ≥10% above internal fSW, and skip-mode operation below 300mA load to reduce standby current to 30µA. Overvoltage (110% VFB trip), thermal shutdown (+175°C), and cycle-by-cycle current limiting (4.1A typ) are implemented with automatic recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports wide automotive battery range including cold-crank (≥3.5V) and load-dump (42V transient tolerant) |
| Output Current | 3A continuous - sustains full load at 125°C ambient with TSSOP-16 package and proper PCB copper area |
| Switching Frequency | 1MHz to 2.2MHz - resistor-programmable via FOSC pin; enables compact magnetics and noise-sensitive layout optimization |
| Quiescent Current | 30µA at no load - enables always-on systems (e.g., CAN wake-up circuits) without excessive battery drain |
| Output Voltage Options | 5V fixed (FB tied to BIAS) or 1V–10V adjustable (via external resistor divider) - simplifies design for multiple rail requirements |
| Protection Features | Overcurrent (cycle-by-cycle), overvoltage (110% VFB trip), thermal shutdown (+175°C), and PGOOD monitoring - ensures robust operation in harsh environments |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 stress test guidelines |
Pinout & Package
MAX16907SAUE+T is housed in a 16-pin TSSOP package with exposed pad (EP) for thermal dissipation. The EP must be soldered to a large contiguous copper ground plane; it is not a functional signal pin but critical for junction-to-ambient thermal resistance of 38.3°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FSYNC) | Synchronization input | Accepts external clock ≥10% above internal fSW; disables internal spread spectrum when active |
| 2 (FOSC) | Frequency-setting input | Resistor-to-GND sets fSW from 1–2.2MHz; 12kΩ yields 2.2MHz typical |
| 3 (PGOOD) | Open-drain power-good output | Asserts low when VOUT drops below 92.5% VFB; used for supply sequencing and fault indication |
| 4 (OUT) | Switch-regulator output | Delivers regulated voltage; powers internal circuitry when VOUT = 3–5V in standby mode |
| 5 (FB) | Feedback input | Connect to BIAS for 5V fixed output; connect to resistive divider for adjustable output (VFB = 1.0V) |
| 6 (COMP) | Error-amplifier output | External RC compensation network stabilizes control loop; referenced to GND |
| 7 (BIAS) | Linear regulator output | 5V/100mA LDO powering internal logic; requires 1µF ceramic bypass to GND |
| 8 (GND) | Analog/digital ground | Main reference node; connects to EP and all local decoupling capacitors |
| 9 (BST) | Bootstrap supply | 0.1µF capacitor between BST and LX enables high-side gate drive; critical for MOSFET turn-on |
| 10 (SUP) | Bias supply input | Powers internal LDO; requires ≥4.7µF ceramic capacitor to GND for stability |
| 11–12 (LX) | Switching node | Connects to inductor and Schottky freewheeling diode cathode; high dv/dt node requiring short trace 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/12V systems; 2V threshold with 0.2V hysteresis; pulls device into 5µA shutdown |
| 16 (I.C.) | Internally connected | Must be tied to GND; not functional but required for correct internal biasing |
| EP | Exposed thermal pad | Electrically connected to GND; mandatory for thermal performance and reliability in automotive operation |
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% maximum duty cycle | Maintains regulation during cold-crank (e.g., 6V input → 5V output) without dropout, critical for engine start-up |
| Spread-spectrum modulation (S-version) | ±6% triangular frequency dither at 2.2MHz base reduces peak EMI by >10dB, easing CISPR-25 Class 5 compliance |
| Fast load-transient response | Recovers from 0→3A step within 100µs with <50mV overshoot, protecting downstream 5V logic and sensors |
| Integrated 3A high-side switch | 70mΩ RDS(on) MOSFET eliminates external switch and gate driver, reducing BOM count and board space by >30% |
| Power-good (PGOOD) monitor | Provides precise enable/disable signaling for microcontroller reset sequencing and system-level power management |
Applications
| Automotive Engine Control Unit (ECU) | ADAS Camera Power Supply |
|---|---|
|
Use Scenario: Powers 3.3V/5V rails for microcontrollers, CAN transceivers, and sensor interfaces in under-hood ECUs exposed to –40°C to +125°C ambient and 42V load-dump transients. IC Role / Device Role / Timing Role: Primary 5V buck regulator supplying core logic and communication peripherals; provides PGOOD for safe MCU boot sequencing. Use Value: 30µA quiescent current prevents battery drain during vehicle sleep mode; 98% duty cycle maintains regulation during cranking. |
Use Scenario: Generates clean 5V supply for image sensors and ISP processors in forward-facing ADAS cameras mounted near windshield. IC Role / Device Role / Timing Role: Point-of-load DC-DC converter delivering low-noise, tightly regulated 5V with fast transient response to handle burst-mode imaging loads. Use Value: Spread-spectrum operation suppresses EMI that could corrupt image data; 2.2MHz switching enables small 2.2µH inductor and minimal footprint. |
| Industrial IoT Gateway | Railway Onboard Controller |
|
Use Scenario: Powers ARM-based gateway SoCs and cellular/Wi-Fi modules in industrial edge devices operating from 24V DC rails with brownout conditions. IC Role / Device Role / Timing Role: Main system regulator converting 24V to 5V; synchronized to system clock via FSYNC to avoid beat frequencies with other switching supplies. Use Value: Adjustable output supports multiple SoC variants; 1–2.2MHz programmability allows noise-sensitive RF sections to operate in quiet bands. |
Use Scenario: Supplies 5V to safety-critical train control logic in EN 50121-3-2 compliant onboard computers subjected to 36V nominal and 60V surge conditions. IC Role / Device Role / Timing Role: High-reliability buck converter with overvoltage, overtemperature, and short-circuit protection meeting SIL-2 functional safety requirements. Use Value: Thermal shutdown with 15°C hysteresis prevents thermal runaway; PGOOD enables watchdog-triggered fail-safe state transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRTWRQ1 | 4A output, 3.5–36V input, 2.1MHz fixed fSW, no spread spectrum, 17µA IQ | Lacks PGOOD and adjustable frequency; optimized for higher efficiency at mid-load, not ultra-low IQ | Select when higher current headroom and lower quiescent current are prioritized over EMI control and sequencing flexibility |
| TPS62933QPWRRQ1 | 3A output, 3–36V input, 1–2.2MHz adjustable fSW, 15µA IQ, no integrated high-side FET driver | Requires external MOSFET; lacks BIAS LDO and cold-crank duty cycle boost | Select when discrete FET selection is needed for thermal or SOA optimization, and external bias supply is available |
Compared with LM61480QRTWRQ1 and TPS62933QPWRRQ1, MAX16907SAUE+T uniquely combines 5V fixed output, integrated BIAS LDO, 98% cold-crank duty cycle, and factory-enabled spread spectrum-making it optimal for cost-sensitive, space-constrained automotive modules requiring robust sequencing and EMI control.
Availability
MAX16907SAUE+T is available at Aetrix Electronics and suitable for automotive ECU, ADAS camera, and industrial IoT gateway designs requiring stable component supply, AEC-Q100-compliant operation, and long-term lifecycle support.
Supply support for MAX16907SAUE+T 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 precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX16907SAUE+T belongs to Maxim's automotive power management portfolio, engineered specifically for demanding 12V/24V vehicle systems requiring high transient immunity, ultra-low standby current, and seamless integration with CAN/LIN networks.
FAQ
What is the maximum input voltage the MAX16907SAUE+T can withstand during load-dump events?
The MAX16907SAUE+T tolerates input transients up to 42V for durations less than 1 second, as specified in its Absolute Maximum Ratings. This capability eliminates the need for external TVS diodes in standard automotive load-dump protection schemes, provided the input capacitor network is properly sized per the datasheet guidelines. The device remains fully functional after such events without latch-up or parameter shift.
Does the MAX16907SAUE+T support both fixed 5V and adjustable output configurations?
Yes, the MAX16907SAUE+T supports both configurations. For fixed 5V output, connect the FB pin directly to the BIAS pin. For adjustable output from 1V to 10V, use an external resistive divider between OUT and GND with FB connected to the divider midpoint. The internal feedback reference is precisely 1.00V (±1.5mV), enabling accurate regulation across temperature and line variations.
How does the MAX16907SAUE+T achieve 98% duty cycle during cold-crank conditions?
The MAX16907SAUE+T achieves 98% duty cycle by dynamically managing its dual-supply architecture: SUP powers the control logic while SUPSW powers the high-side switch. During cold-crank (e.g., 6V input), the controller maintains high duty cycle by regulating the gate drive and minimizing internal losses, ensuring continuous 5V output even when input drops near the 3.5V minimum. This behavior is verified across –40°C to +125°C.
What is the purpose of the I.C. pin on the MAX16907SAUE+T, and how should it be connected?
The I.C. pin (Pin 16) on the MAX16907SAUE+T is internally connected and must be tied to GND for proper device operation. It is not a functional signal pin but serves an internal biasing role. Leaving it floating or connecting it to any other voltage violates the recommended operating conditions and may cause erratic startup behavior or failure to regulate. This connection is mandatory in all layouts.
Can the MAX16907SAUE+T be synchronized to an external clock, and what are the timing requirements?
Yes, the MAX16907SAUE+T can be synchronized to an external clock applied to the FSYNC pin. The external clock frequency must exceed the internal oscillator frequency by at least 10% for reliable acquisition. The device locks to the external signal within one cycle (tFSYNC = 1 cycle), and spread-spectrum modulation is automatically disabled when FSYNC is active. This feature enables deterministic noise placement in multi-rail systems.
MAX16907SAUE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 3A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MAX16907SAUE+T FAQ
1.How can I place an order for MAX16907SAUE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16907SAUE+T 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 MAX16907SAUE+T reliable?
The price and inventory of MAX16907SAUE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16907SAUE+T is usually 5 days.
3.What payment methods are accepted for MAX16907SAUE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16907SAUE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16907SAUE+T?
MAX16907SAUE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16907SAUE+T 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 MAX16907SAUE+T?
For technical support, including MAX16907SAUE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16907SAUE+T requirements.
6.How does Aetrix verify that MAX16907SAUE+T is sourced from the original manufacturer or authorized distributors?
All MAX16907SAUE+T 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 MAX16907SAUE+T meets industry standards.
7.What is the process for return or replacement of MAX16907SAUE+T?
All MAX16907SAUE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16907SAUE+T, 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 MAX16907SAUE+T part is unused and in its original packaging.
Return procedure for MAX16907SAUE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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