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Analog Devices Inc./Maxim Integrated MAX5097BATE+T
- Part No.:
- MAX5097BATE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5097BATE+T.pdf
- Description:
- IC REG BUCK ADJ/5V 600MA 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,646
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Product details
Overview
MAX5097BATE+T from Maxim Integrated is a dual-mode 40V, 600mA buck converter with integrated low-quiescent-current LDO mode, operating in PWM switch-mode (330kHz) at high load and transitioning to 41μA-quiescent LDO mode at light load for automotive microcontroller power management. It delivers fixed 5V output, supports external synchronization, and features programmable soft-start, thermal shutdown, and integrated power-on-reset.
For engineers reviewing the MAX5097BATE+T datasheet, MAX5097BATE+T pinout, MAX5097BATE+T application, or MAX5097BATE+T equivalent, this device is selected for automotive body control modules, infotainment power rails, and always-on ECU subsystems requiring dynamic efficiency optimization across wide input voltage (5–40V buck / 4–40V LDO) and load (0–600mA buck / 0–100mA LDO) ranges.
Technical Context
The MAX5097BATE+T implements current-mode PWM control in buck mode with a factory-fixed 330kHz switching frequency and external synchronization capability (300–500kHz), enabling noise-sensitive layout and EMI compliance. Its dual-mode architecture shares a single p-channel high-side switch (RDS(ON) = 0.9Ω typ) between buck and LDO paths, with separate error amplifiers and compensation schemes.
LDO mode activation is controlled via the LDO/BUCK pin (2.0V high threshold), triggering a 100μs transition delay; buck-to-LDO transition occurs within 32 clock periods. The internal 4V BP regulator powers all circuitry and enables UVLO (3.65V rising, 0.2V hysteresis), while RESET provides open-drain supervision with capacitor-adjustable timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V ±1.2% (4.89–5.09V at 10mA, 4V–40V input), stable over -40°C to +125°C. |
| Switching Frequency | 330kHz fixed (MAX5097), synchronizable 300–500kHz - enables compact magnetics and AM-band EMI avoidance. |
| Buck Output Current | 600mA continuous - sufficient for MCU cores, CAN transceivers, and sensor interfaces without derating. |
| LDO Quiescent Current | 41μA typical at 100μA load - extends battery life during vehicle key-off states. |
| Shutdown Current | 6μA typical - ensures minimal parasitic drain when EN = 0V. |
| Dual-Mode Transition | LDO/BUCK pin controls mode switching: >2V selects LDO (100μA IQ); <0.8V selects buck (85% efficiency @ 400mA). |
| Thermal Protection | 165°C shutdown with 20°C hysteresis - prevents damage under sustained overload or poor heatsinking. |
Pinout & Package
MAX5097BATE+T is housed in a thermally enhanced 16-pin TQFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed pad for PCB-level heat dissipation (θJA = 30.0°C/W, 2.6W max at TA = +70°C).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 15, 16 | IN | Main input supply (5–40V buck / 4–40V LDO); requires parallel ceramic + aluminum bypass capacitors. |
| 4 | PGND | Power ground return for high-side switch and freewheeling diode; must connect to input/output capacitor grounds. |
| 5 | SGND | Signal ground; tie to PGND near CIN return to minimize noise coupling into feedback and control circuits. |
| 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 (300–500kHz); tie to SGND if unused. |
| 9 | SS | Soft-start timer input; connect CSS capacitor (e.g., 0.047μF) to SGND to set monotonic startup ramp time. |
| 10 | CT | Reset timeout period input; capacitor value sets RESET assertion duration after power-up or brownout. |
| 11 | COMP | Buck-mode loop compensation node; external RC network required for stability with selected inductor/capacitor. |
| 12 | LDO/BUCK | Mode select input; >2V forces LDO mode (low IQ); <0.8V enables buck mode (high efficiency). |
| 13 | ADJ | Feedback reference point; tied to SGND for fixed 5V output (MAX5097B); used with resistor divider for adjustable outputs. |
| 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; carries peak currents up to 1.9A. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Mode Efficiency Optimization | Automatically switches between 85% efficient 330kHz buck mode (600mA) and 41μA-quiescent LDO mode (100mA) based on load demand. |
| Integrated Power-On Reset | Capacitor-programmable RESET timeout with 92% VOUT rising threshold and 90% falling threshold - eliminates external supervisor IC. |
| Programmable Soft-Start | Single-CSS capacitor sets monotonic output ramp time, limiting inrush current and preventing system glitches during startup. |
| External Synchronization | SYNC pin accepts 300–500kHz external clock - enables synchronized multi-rail systems and EMI frequency spreading. |
| Robust Protection Suite | Includes thermal shutdown (165°C), short-circuit current limit (150–500mA), output overload detection, and UVLO with hysteresis. |
Applications
| Automotive Body Control Module (BCM) | Infotainment System Power Rail |
|---|---|
Use Scenario: Powering microcontrollers, LIN transceivers, and LED drivers in door modules and lighting controllers during vehicle key-off and ignition cycles. IC Role / Device Role / Timing Role: Dual-mode DC-DC regulator providing 5V rail with sub-50μA quiescent current in LDO mode and high-efficiency buck operation during active state. Use Value: Enables <100μA total system standby current, meeting ISO 16750-2 quiescent drain requirements for 10-year battery life. |
Use Scenario: Supplying 5V to audio DSPs, display controllers, and USB hubs in head units where EMI must avoid AM radio band. IC Role / Device Role / Timing Role: 330kHz buck converter with SYNC input, allowing frequency alignment to avoid interference with adjacent AM channels. Use Value: Eliminates need for shielding or ferrite beads by shifting fundamental switching energy above 300kHz, reducing BOM cost and board area. |
| Engine Control Unit (ECU) Auxiliary Supply | Telematics Control Unit (TCU) Always-On Subsystem |
Use Scenario: Generating stable 5V for CAN FD transceivers and sensor signal conditioning circuits exposed to wide automotive input transients (4V–40V). IC Role / Device Role / Timing Role: Input-tolerant buck-LDO hybrid delivering regulated output despite cold-crank (4.5V) and load-dump (45V transient) events. Use Value: Withstands 45V transient on IN pin and maintains regulation down to 4V input in LDO mode - reduces need for upstream TVS or pre-regulator stages. |
Use Scenario: Powering GPS/GNSS receivers and cellular modems that must remain active during vehicle sleep for remote wake-up and geofencing. IC Role / Device Role / Timing Role: Low-IQ LDO mode (41μA) activated via microcontroller-driven LDO/BUCK pin during deep sleep, with fast buck reactivation on wake event. Use Value: Achieves <50μA total subsystem quiescent draw while retaining full 600mA burst capability for modem transmission - extends telematics battery backup runtime. |
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 |
|---|---|---|---|
| MAX5096BATE+T | 135kHz fixed switching frequency; higher θJA (30.0°C/W same package); identical pinout and dual-mode logic. | Better suited for AM-band-sensitive environments (e.g., radio power supplies) due to lower fundamental frequency and harmonics. | Select MAX5096BATE+T when EMI compliance below 450kHz is critical; MAX5097BATE+T preferred for space-constrained designs needing smaller inductors. |
| TPS54340DDAR | Single-mode 42V buck only (no LDO mode); 3.5–42V input; 3.5A output; no integrated RESET or soft-start; requires external compensation. | Used where continuous high-current buck operation is needed without ultra-low-IQ requirement; lacks automotive-grade LDO fallback. | Choose TPS54340DDAR for cost-sensitive industrial applications without key-off current constraints; MAX5097BATE+T remains optimal for automotive battery-life-critical systems. |
Compared with MAX5096BATE+T, MAX5097BATE+T trades lower EMI risk for smaller passive components; versus TPS54340DDAR, it adds integrated LDO mode, RESET, and soft-start at the cost of reduced max output current - making it uniquely suited for automotive always-on subsystems demanding both efficiency and ultra-low standby drain.
Availability
MAX5097BATE+T is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power rails, and telematics always-on subsystems requiring stable component supply across extended temperature (-40°C to +125°C) and long-lifecycle production programs.
Supply support for MAX5097BATE+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX5096/MAX5097 product line was designed specifically for automotive power systems requiring dynamic efficiency scaling - combining buck converter performance with linear regulator quiescent current for battery-sensitive ECU and module applications.
FAQ
What is the maximum input voltage rating for MAX5097BATE+T in buck mode?
The MAX5097BATE+T supports an input voltage range of +5V to +40V in buck mode. Its absolute maximum rating for the IN pin is +45V for 1ms transients, enabling robust operation during automotive load-dump events. This allows direct connection to vehicle battery rails without additional overvoltage protection in most implementations.
How does the LDO/BUCK pin control mode selection in MAX5097BATE+T?
The LDO/BUCK pin on MAX5097BATE+T selects operating mode: driving it above 2.0V (typ) forces LDO mode with 41μA quiescent current, while pulling it below 0.8V (typ) enables buck mode with 330kHz switching. Transition from buck to LDO takes 100μs; LDO to buck completes within 32 internal clock periods - enabling microcontroller-controlled dynamic efficiency scaling.
Can MAX5097BATE+T be synchronized to an external clock, and what is its sync frequency range?
Yes, MAX5097BATE+T supports external synchronization via the SYNC pin, accepting clock frequencies from 300kHz to 500kHz. This allows precise timing alignment across multiple power rails to reduce beat frequencies and simplify EMI filtering. When not used, SYNC must be tied to SGND to prevent noise coupling into the internal oscillator.
What output voltage options are supported by MAX5097BATE+T?
MAX5097BATE+T is the fixed 5V version of the family. It delivers 4.89V to 5.09V (±1.2%) across temperature and load when ADJ is tied to SGND. For adjustable outputs (1.237V–11V), use the MAX5097AATE+T variant with external resistor divider on the ADJ pin - the MAX5097BATE+T itself is not configurable outside its factory-trimmed 5V setting.
Does MAX5097BATE+T include built-in protection features, and which ones?
Yes, MAX5097BATE+T integrates thermal shutdown (165°C trip, 20°C hysteresis), short-circuit current limiting (150–500mA), output overload detection, input undervoltage lockout (3.65V rising, 0.2V hysteresis), and cycle-by-cycle current limiting in buck mode. These protections operate in both buck and LDO modes, ensuring safe operation under fault conditions without external circuitry.
MAX5097BATE+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 (5V)
- 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)
MAX5097BATE+T FAQ
1.How can I place an order for MAX5097BATE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5097BATE+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 MAX5097BATE+T reliable?
The price and inventory of MAX5097BATE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5097BATE+T is usually 5 days.
3.What payment methods are accepted for MAX5097BATE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5097BATE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5097BATE+T?
MAX5097BATE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5097BATE+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 MAX5097BATE+T?
For technical support, including MAX5097BATE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5097BATE+T requirements.
6.How does Aetrix verify that MAX5097BATE+T is sourced from the original manufacturer or authorized distributors?
All MAX5097BATE+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 MAX5097BATE+T meets industry standards.
7.What is the process for return or replacement of MAX5097BATE+T?
All MAX5097BATE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5097BATE+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 MAX5097BATE+T part is unused and in its original packaging.
Return procedure for MAX5097BATE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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