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Analog Devices Inc./Maxim Integrated MAX5097AATE+T
- Part No.:
- MAX5097AATE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5097AATE+T.pdf
- Description:
- IC REG BUCK ADJ/1.24V 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,508
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Product details
Overview
The MAX5097AATE+ from Maxim Integrated is a dual-mode 40V, 600mA buck DC-DC converter with integrated low-quiescent-current LDO mode, operating at 330kHz fixed switching frequency, delivering 5V output (A-grade), and supporting automotive temperature range (-40°C to +125°C) in a 16-pin TQFN-EP package. It enables seamless on-the-fly transition between high-efficiency PWM buck mode (>85% efficiency at 400mA) and ultra-low-IQ LDO mode (41μA typical at 100μA load), ideal for automotive body control modules requiring key-off current minimization.
For engineers reviewing the MAX5097AATE+ datasheet, MAX5097AATE+ pinout, MAX5097AATE+ application, or MAX5097AATE+ equivalent, this page delivers verified functional identity, validated pin roles, confirmed thermal and electrical specs across both operating modes, and real-world selection guidance for automotive power management designs where quiescent current, transient response, and mode-switching timing are critical.
Technical Context
The MAX5097AATE+ implements a current-mode PWM architecture with internal 0.9Ω p-channel high-side switch and external freewheeling diode, enabling cycle-by-cycle current limiting and stable compensation via external COMP network. Its Dual Mode™ operation uses dedicated LDO/BUCK logic input to select between buck (5–40V input, 600mA max) and LDO (4–40V input, 100mA max) paths sharing the same pass element but separate error amplifiers.
It integrates a 4V internal BP regulator (±7% accuracy), programmable soft-start (via SS capacitor), adjustable power-on-reset timeout (via CT capacitor), and synchronized oscillator (330kHz ±10%, sync range 300–500kHz). Thermal shutdown activates at +165°C with 20°C hysteresis, and protection includes short-circuit, overload, and UVLO (3.65V rising, 0.2V hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 330kHz fixed - enables compact 22μH inductor and low-ESR output capacitor selection; supports EMI-sensitive layouts. |
| Buck Output Current | 600mA continuous - sufficient for microcontroller core rails, CAN transceivers, and sensor interfaces without external boost. |
| LDO Quiescent Current | 41μA typical at 100μA load - meets automotive key-off <100μA system standby requirements. |
| Input Voltage Range | 5–40V (buck), 4–40V (LDO) - covers cold-crank (4.5V), normal battery (12–14V), and load-dump (40V) conditions. |
| Output Voltage Accuracy | ±2.5% over -40°C to +125°C - ensures reliable reset assertion and I/O rail stability in engine bay environments. |
| Thermal Dissipation | 2.6W at TA = +70°C (16-pin TQFN) - supports sustained 600mA operation with minimal heatsinking in compact ECUs. |
| Shutdown Current | 6μA typical - reduces parasitic drain during extended vehicle sleep states. |
Pinout & Package
Package: 16-pin thermally enhanced TQFN-EP (4mm × 4mm, 0.5mm pitch) with exposed pad soldered to SGND plane for optimal thermal performance (θJA = 30.0°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 15,16) | Power input supply | Dual-input pins reduce trace resistance and improve high-current handling; bypass directly to PGND with ceramic + aluminum capacitors. |
| PGND (Pin 1) | Power ground return | Primary return path for high-side switch and inductor current; must connect to input/output capacitor grounds and freewheeling diode anode. |
| SGND (Pin 2) | Signal reference ground | Separate analog ground for feedback, control, and reset circuits; tied to PGND only near input capacitor to avoid noise coupling. |
| LX (Pins 13,14) | Switch node | Drain of internal p-channel MOSFET; connects to inductor and freewheeling diode cathode; requires tight layout to minimize EMI. |
| LDO/BUCK (Pin 9) | Mode-select logic input | High (>2V) forces LDO mode (41μA IQ); low (<0.8V) enables buck mode (600mA); transition delay is 100μs (LDO→buck) or 32 clock cycles (buck→LDO). |
| EN (Pin 12) | Enable control | Logic-level input (1.4V threshold); internally pulldown; drives high to enable, low/unconnected for 6μA shutdown. |
| OUT (Pin 11) | Regulated output | Must connect ≥22μF low-ESR capacitor to PGND; serves as reference for ADJ, RESET, and soft-start circuits. |
| ADJ (Pin 10) | Feedback reference point | Connected to SGND for fixed 5V output (MAX5097A); used with resistor divider for adjustable outputs (1.237V setpoint). |
| COMP (Pin 8) | Buck loop compensation | External RC network sets bandwidth and phase margin; not used in LDO mode which requires no external compensation. |
| RESET (Pin 3) | Open-drain reset output | Asserts low when VOUT drops below 90% nominal; timeout period set by CT capacitor; requires external pullup for logic-level output. |
| SS (Pin 6) | Soft-start timer | 5μA current source charges external capacitor; controls monotonic VOUT ramp-up time; discharged instantly on EN toggle. |
| CT (Pin 7) | Reset timeout capacitor | 1μA current charges capacitor to 1.237V threshold; determines RESET active duration after power-on or brownout recovery. |
| SYNC (Pin 5) | External clock input | Accepts 300–500kHz square wave for EMI reduction or frequency coordination; grounded when unused. |
| BP (Pin 4) | Internal 4V bias supply | Powers internal circuitry; bypassed with ≥1μF ceramic cap to SGND; not for external loading beyond 25mA. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ Operation | Hardware-selectable buck (600mA, 85% eff.) or LDO (100mA, 41μA IQ) modes using single LDO/BUCK pin - eliminates need for discrete LDO in always-on subsystems. |
| Automotive-Grade Thermal Range | -40°C to +125°C operation with thermal shutdown at +165°C and 20°C hysteresis - ensures reliability in under-hood ECU deployments. |
| Integrated Power-On Reset | Adjustable timeout via CT capacitor and precise 90%/92% VOUT thresholds - provides deterministic microcontroller initialization without external supervisor IC. |
| Programmable Soft-Start | Externally set via SS capacitor (5μA charge current) - prevents inrush current damage and voltage glitches during cold-crank startup. |
| Current-Mode PWM Control | Internal 0.9Ω p-channel switch with cycle-by-cycle current limit and external COMP compensation - simplifies loop stability design across wide input/output ranges. |
Applications
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera Power |
|---|---|
Use Scenario: Powering microcontroller, LIN transceivers, and door-lock actuators in vehicle BCM with strict key-off current budget. IC Role / Device Role / Timing Role: Dual-mode regulator providing 5V buck rail during ignition and 5V LDO rail during key-off, controlled by MCU-driven LDO/BUCK signal. Use Value: Reduces system standby current from >100μA to 41μA typical, extending battery life during 30-day parking scenarios without compromising wake-up responsiveness. | Use Scenario: Supplying image sensor and ISP in rear-view camera module exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Primary 5V power source with integrated RESET and thermal shutdown, operating in buck mode during video streaming and LDO mode during idle. Use Value: Eliminates need for separate LDO and supervisor ICs; maintains 5V regulation within ±2.5% across -40°C to +125°C, ensuring consistent image quality and fault-free boot. |
| Infotainment System Core Rail | Automotive Gateway Controller |
Use Scenario: Generating stable 5V core supply for SoC in head-unit with variable load (100mA–600mA) and EMI constraints. IC Role / Device Role / Timing Role: High-frequency (330kHz) buck converter with SYNC input for spread-spectrum coordination with display backlight driver. Use Value: Enables use of smaller 22μH inductor and 22μF ceramic output cap; achieves >81% efficiency at 400mA while keeping fundamental switching noise above AM band. | Use Scenario: Powering multi-protocol gateway (CAN FD, Ethernet, LIN) requiring robust reset sequencing and brownout immunity. IC Role / Device Role / Timing Role: Primary 5V rail with daisy-chained RESET-to-EN sequencing across multiple MAX5097AATE+ units for controlled power-up order. Use Value: Guarantees deterministic boot sequence: main MCU powers first, then peripheral transceivers, preventing bus contention and protocol initialization failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-mode DC-DC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5096AATE+ | 135kHz switching frequency, lower EMI fundamental; identical pinout, package, and LDO specs. | Better suited for AM-band-sensitive locations (e.g., radio power supply); larger inductor required vs. MAX5097AATE+. | Select when EMI compliance at <150kHz is mandatory and board space allows larger magnetics. |
| TPS54340DDAR | Single-mode 40V buck only (no LDO mode); 3.5–40V input; 3.5A output; requires external LDO for key-off. | Higher current capability but lacks integrated LDO and auto-mode switching; needs additional components for automotive standby. | Choose only if >600mA output is required and system can accommodate separate low-IQ LDO + sequencing logic. |
Compared with MAX5096AATE+, the MAX5097AATE+ offers higher switching frequency for smaller passive components but trades slightly higher no-load current (680μA vs. 693μA in buck mode); versus TPS54340DDAR, it integrates LDO mode and reset functionality, reducing BOM count and PCB area in automotive body electronics.
Availability
The MAX5097AATE+ is available at Aetrix Electronics and suitable for automotive body control modules, ADAS camera systems, infotainment core rails, and gateway controllers requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX5097AATE+ 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 MAX5097AATE+ belongs to Maxim's automotive-grade Dual Mode™ DC-DC converter family, engineered specifically for power-constrained vehicle subsystems needing seamless transition between high-efficiency switching and ultra-low-quiescent linear regulation.
FAQ
What is the guaranteed output voltage accuracy of the MAX5097AATE+ over temperature?
The MAX5097AATE+ guarantees ±2.5% output voltage accuracy over the full -40°C to +125°C automotive temperature range for its fixed 5V output version. This is confirmed in the Electrical Characteristics table under "Fixed Output Voltage" with test conditions specifying 5.5V ≤ VIN ≤ 40V and IOUT = 10mA. The accuracy holds across line, load, and temperature variations, making it suitable for powering microcontrollers and sensors without external trimming.
How does the MAX5097AATE+ handle mode transitions between buck and LDO operation?
The MAX5097AATE+ transitions from buck to LDO mode within 100μs after the LDO/BUCK pin rises above 2V, and from LDO to buck mode after 32 internal clock cycles (≈96μs at 330kHz) once LDO/BUCK falls below 0.8V. Both transitions are hardware-controlled with no software intervention required. The device shares the same pass element and reference in both modes, ensuring smooth voltage continuity without dropout or overshoot during switching.
Can the MAX5097AATE+ be synchronized to an external clock, and what is its sync range?
Yes, the MAX5097AATE+ supports external synchronization via the SYNC pin, with a valid input frequency range of 300kHz to 500kHz. The internal oscillator operates at 330kHz (±10%), and the SYNC input accepts TTL/CMOS-compatible square waves. When not used, SYNC must be tied to SGND. This feature enables EMI reduction through frequency coordination with other switching regulators in the system.
What thermal protection mechanisms are built into the MAX5097AATE+?
The MAX5097AATE+ incorporates thermal shutdown that activates at +165°C junction temperature, turning off both buck and LDO regulation and discharging the soft-start capacitor. It features 20°C hysteresis, so the device re-enables only after cooling to +145°C. This cycling behavior prevents permanent damage during sustained overload. The 16-pin TQFN package delivers 2.6W dissipation at +70°C ambient, supported by θJA = 30.0°C/W and θJC = 1.7°C/W ratings.
Is the MAX5097AATE+ pin-compatible with the MAX5096AATE+?
Yes, the MAX5097AATE+ is fully pin-compatible and footprint-compatible with the MAX5096AATE+, sharing identical 16-pin TQFN-EP packaging, pin assignments, and electrical interface. The only functional difference is the internal oscillator frequency (330kHz vs. 135kHz); all control signals (EN, LDO/BUCK, SYNC, SS, CT, RESET), power pins (IN, LX, PGND, SGND, OUT, BP), and feedback (ADJ, COMP) operate identically. This allows direct substitution where higher switching frequency is acceptable.
MAX5097AATE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN 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):
- 5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.24V (3.3V)
- Voltage - Output (Max):
- 11V
- Current - Output:
- 600mA
- Frequency - Switching:
- 330kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX5097AATE+T FAQ
1.How can I place an order for MAX5097AATE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5097AATE+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 MAX5097AATE+T reliable?
The price and inventory of MAX5097AATE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5097AATE+T is usually 5 days.
3.What payment methods are accepted for MAX5097AATE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5097AATE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5097AATE+T?
MAX5097AATE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5097AATE+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 MAX5097AATE+T?
For technical support, including MAX5097AATE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5097AATE+T requirements.
6.How does Aetrix verify that MAX5097AATE+T is sourced from the original manufacturer or authorized distributors?
All MAX5097AATE+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 MAX5097AATE+T meets industry standards.
7.What is the process for return or replacement of MAX5097AATE+T?
All MAX5097AATE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5097AATE+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 MAX5097AATE+T part is unused and in its original packaging.
Return procedure for MAX5097AATE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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