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Analog Devices Inc./Maxim Integrated MAX5097AATE+
- Part No.:
- MAX5097AATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5097AATE+.pdf
- Description:
- IC REG BUCK ADJ/1.24V 16TQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX5097AATE+ from Maxim Integrated is a dual-mode 40V, 600mA buck converter with integrated low-quiescent-current LDO functionality. It operates in high-efficiency PWM buck mode (330kHz fixed frequency) at heavy loads and transitions to ultra-low-IQ LDO mode (41μA typ at 100μA load) at light loads. Designed for automotive systems, it delivers 3.3V output with ±1.5% initial accuracy, supports VIN from 5V–40V (buck) or 4V–40V (LDO), and includes thermal shutdown, short-circuit protection, and programmable soft-start.
For engineers reviewing the MAX5097AATE+ datasheet, MAX5097AATE+ pinout, MAX5097AATE+ application, or MAX5097AATE+ equivalent, key selection considerations include its 330kHz switching frequency, 16-pin TQFN-EP package with exposed pad, dual-mode control via LDO/BUCK pin, and automotive-grade -40°C to +125°C operation with integrated RESET and SYNC capability.
Technical Context
The MAX5097AATE+ implements current-mode PWM control in buck mode with external compensation on the COMP pin, enabling stable loop design across wide input/output conditions. Its internal p-channel high-side switch (RDS(ON) = 0.9Ω typ) and integrated 4V BP regulator support robust start-up and biasing without external LDOs.
In LDO mode, the same pass element is repurposed as a linear regulator controlled by separate error amplification-no external compensation required. Mode transition is deterministic: rising LDO/BUCK signal triggers LDO activation after 100μs; falling edge initiates buck operation after 32 clock cycles, ensuring glitch-free handover between power states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V (±1.5% initial accuracy); adjustable range 1.237V–11V via ADJ pin |
| Switching Frequency | 330kHz fixed (MAX5097 variant); enables compact 22μH inductor and 22μF output capacitor |
| Max Output Current | 600mA in buck mode; 100mA in LDO mode (limited by thermal dissipation in 16-pin TQFN) |
| Quiescent Current | 41μA typ in LDO mode at 100μA load; 6μA typ in shutdown |
| Input Voltage Range | +5V to +40V (buck), +4V to +40V (LDO); internal UVLO threshold 3.65V with 0.2V hysteresis |
| Operating Temperature | -40°C to +125°C ambient; junction limit +150°C; thermal shutdown at +165°C with 20°C hysteresis |
| Package | 16-pin TQFN-EP (4mm × 4mm); θJA = 30.0°C/W; 2.6W power dissipation at TA = +70°C |
Pinout & Package
MAX5097AATE+ is housed in a thermally enhanced 16-pin TQFN-EP package (4mm × 4mm, 0.5mm pitch) with exposed pad (EP) for improved heat dissipation. The EP must be soldered to a large SGND plane but not used as an electrical ground connection.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 15, 16 | IN | Regulator input (5V–40V); requires parallel ceramic + aluminum bypass capacitors to handle ripple current |
| 4 | PGND | Power ground return for high-side switch; connect input cap, diode anode, and output cap here |
| 5 | SGND | Signal ground; tie to PGND near input cap return to minimize noise coupling |
| 6 | RESET | Open-drain active-low reset output; asserts when VOUT drops below 90% of nominal; timeout set by CT capacitor |
| 7 | BP | 4V internal regulator output; bypass with ≥1μF ceramic cap close to pin; supplies internal circuitry only |
| 8 | SYNC | Synchronization input; accepts external clock 300kHz–500kHz; tie to SGND if unused |
| 9 | SS | Soft-start timer input; connect CSS capacitor to SGND to program monotonic startup ramp time |
| 10 | CT | Reset timeout period setting; capacitor value determines RESET assertion duration after power-on |
| 11 | COMP | Buck-mode loop compensation node; external RC network sets bandwidth and phase margin |
| 12 | LDO/BUCK | Mode select input; >2V forces LDO mode (100μs delay); <0.8V selects buck mode (32-clock-cycle delay) |
| 13 | ADJ | Feedback reference point; tied to SGND for fixed 3.3V output; >125mV enables adjustable mode (VFB = 1.237V) |
| 14 | OUT | Regulated output; requires ≥22μF low-ESR capacitor to PGND for stability in both modes |
| 15, 16 | LX | Drain of internal p-channel high-side switch; connects to inductor and freewheeling diode anode |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode architecture | Seamlessly switches between 85% efficient 330kHz buck mode (600mA) and 41μA-IQ LDO mode (100mA) based on load demand |
| Integrated microprocessor reset | Open-drain RESET with capacitor-programmable timeout; monitors VOUT and asserts low below 90% of regulation |
| Programmable soft-start | Monotonic output ramp using external SS capacitor; prevents inrush current and system glitches during power-up |
| External frequency synchronization | SYNC pin accepts 300kHz–500kHz external clock, enabling EMI reduction and multi-converter phase alignment |
| Thermal and fault protection | Full protection suite: overcurrent (1.15A–1.9A switch limit), short-circuit, thermal shutdown (+165°C), and UVLO with hysteresis |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Supply |
|---|---|
Use Scenario: Powering microcontrollers and CAN transceivers in door modules and seat controllers during vehicle key-off. IC Role / Device Role / Timing Role: Dual-mode regulator providing 3.3V at 100mA in LDO mode for ultra-low standby current, then switching to buck mode during wake-up events. Use Value: Reduces quiescent current to 41μA in LDO mode-critical for meeting ISO 16750-2 battery drain limits. |
Use Scenario: Generating stable 3.3V rail for audio DSPs and display interfaces in head units with variable load profiles. IC Role / Device Role / Timing Role: Buck converter delivering 600mA at 330kHz during active playback; transitions to LDO mode during pause/sleep. Use Value: 330kHz switching enables smaller magnetics and lower EMI than 135kHz alternatives, easing EMC compliance. |
| Industrial Sensor Node | Telematics Control Unit (TCU) |
Use Scenario: Powering low-power sensors and wireless transceivers in remote monitoring equipment operating from 12V/24V batteries. IC Role / Device Role / Timing Role: Primary DC-DC regulator with programmable soft-start and RESET supervision for reliable cold-start behavior. Use Value: Wide 4V–40V input range accommodates brownouts and cranking transients; -40°C to +125°C rating ensures field reliability. |
Use Scenario: Supplying 3.3V to cellular modems and GNSS receivers in vehicle telematics systems requiring high transient immunity. IC Role / Device Role / Timing Role: Dual-mode regulator with SYNC input synchronized to system clock to avoid beat frequencies in RF-sensitive bands. Use Value: External SYNC capability eliminates switching noise interference with LTE/GNSS receivers, improving signal integrity. |
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 |
|---|---|---|---|
| MAX5097BATE+ | Fixed 5V output (vs. 3.3V for MAX5097AATE+); identical pinout, package, and electrical specs otherwise | Used where 5V logic rails or USB peripherals require primary regulation | Select MAX5097BATE+ when system requires 5V instead of 3.3V; no layout or firmware changes needed |
| LM5165QPWPRQ1 | Single-mode 65V buck only (no LDO mode); 650mA output; 100kHz–2.2MHz adjustable frequency; no integrated RESET or soft-start | Suitable for high-input-voltage industrial applications where ultra-low-IQ standby is not required | Choose LM5165QPWPRQ1 only if LDO mode is unnecessary and higher VIN tolerance (65V) is critical |
Compared with MAX5097BATE+, MAX5097AATE+ provides identical performance at 3.3V output-ideal for modern low-voltage MCUs. Compared with LM5165QPWPRQ1, MAX5097AATE+ adds LDO mode, RESET, soft-start, and SYNC, making it superior for automotive battery-powered systems requiring low standby power and system-level supervision.
Availability
MAX5097AATE+ is available at Aetrix Electronics and suitable for automotive body electronics, infotainment subsystems, and industrial sensor nodes requiring stable component supply across extended temperature ranges and long production 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 MAX5096/MAX5097 product line targets automotive power systems needing adaptive efficiency-delivering high conversion efficiency under load while minimizing quiescent current during idle or key-off states.
FAQ
What output voltage does the MAX5097AATE+ deliver?
The MAX5097AATE+ delivers a factory-trimmed fixed 3.3V output with ±1.5% initial accuracy across temperature and line. It can also operate in adjustable mode (1.237V–11V) when the ADJ pin is configured with an external resistor divider. The MAX5097AATE+ datasheet specifies 3.3V output for the 'A' suffix variant, confirmed in the Ordering Information table and Electrical Characteristics section.
How does the MAX5097AATE+ switch between buck and LDO modes?
The MAX5097AATE+ switches modes via the LDO/BUCK pin: driving it >2V selects LDO mode with 100μs activation delay; pulling it <0.8V selects buck mode with 32 internal clock cycles (~96ns at 330kHz) delay. This transition is fully deterministic and occurs without output disruption. The MAX5097AATE+ uses separate error amplifiers and compensation schemes for each mode, as detailed in the Detailed Description section.
What is the maximum continuous output current in LDO mode for the MAX5097AATE+?
The MAX5097AATE+ supports up to 100mA continuous output current in LDO mode, limited by thermal dissipation in its 16-pin TQFN-EP package (2.6W at TA = +70°C). At full 100mA load, dropout voltage is 0.37V (for 5V version) and line/load regulation remain within spec. This 100mA rating is explicitly stated in the Electrical Characteristics table under "Guaranteed Output Current (LDO Mode)" and applies to the MAX5097AATE+.
Does the MAX5097AATE+ require external compensation in both operating modes?
No-the MAX5097AATE+ requires external compensation only in buck mode via the COMP pin; LDO mode uses internal compensation and needs no external components. The datasheet's Compensation Network section and Pin Description confirm COMP is "Buck Converter (Buck Mode) Control-Loop Compensation" and explicitly state "LDO mode does not need external compensation." This simplifies design when leveraging LDO mode for low-power states.
What package type and thermal characteristics apply to the MAX5097AATE+?
The MAX5097AATE+ uses a 16-pin TQFN-EP package (4mm × 4mm, 0.5mm pitch) with exposed pad. Its thermal resistance is θJA = 30.0°C/W and θJC = 1.7°C/W per JEDEC 51 on a multilayer board. Maximum power dissipation is 2666mW at TA = +70°C, derating 33.3mW/°C above that. These values are specified in the Package Thermal Characteristics table and match the ordering information row for MAX5097AATE+.
MAX5097AATE+ 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):
- 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+ FAQ
1.How can I place an order for MAX5097AATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5097AATE+ 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+ reliable?
The price and inventory of MAX5097AATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5097AATE+ is usually 5 days.
3.What payment methods are accepted for MAX5097AATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5097AATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5097AATE+?
MAX5097AATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5097AATE+ 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+?
For technical support, including MAX5097AATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5097AATE+ requirements.
6.How does Aetrix verify that MAX5097AATE+ is sourced from the original manufacturer or authorized distributors?
All MAX5097AATE+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX5097AATE+?
All MAX5097AATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5097AATE+, 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+ part is unused and in its original packaging.
Return procedure for MAX5097AATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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