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Analog Devices Inc./Maxim Integrated MAX5097BATE+
- Part No.:
- MAX5097BATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5097BATE+.pdf
- Description:
- IC REG BUCK ADJ/5V 600MA 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:169
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Product details
Overview
MAX5097BATE+ from Maxim Integrated is a dual-mode 40V, 600mA buck converter with integrated low-quiescent-current LDO regulator functionality. It operates in high-efficiency PWM buck mode (330kHz fixed frequency) under heavy load and switches to ultra-low-IQ LDO mode (41μA typical at 100μA load) during light-load or key-off conditions. Designed for automotive power rails, it delivers regulated 5V output (±1.2% over temperature) from 5–40V input in buck mode and 4–40V in LDO mode.
For engineers reviewing the MAX5097BATE+ datasheet, MAX5097BATE+ pinout, MAX5097BATE+ application, or MAX5097BATE+ equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and protection behavior, real-world transient response data, and two rigorously cross-checked alternative parts for automotive-grade DC-DC conversion with adaptive efficiency modes.
Technical Context
The MAX5097BATE+ implements current-mode PWM control in buck mode with internal 0.9Ω p-channel high-side switch, enabling cycle-by-cycle current limiting and stable operation with external compensation. Its dual-mode architecture uses a shared pass element and reference but separate error amplifiers - one optimized for buck loop stability (COMP pin), the other for LDO regulation without external compensation.
Mode selection is dynamic via the LDO/BUCK pin: driving it high (>2V) forces immediate LDO activation (100μs delay), while pulling it low initiates buck operation after 32 clock cycles. The integrated 4V BP regulator powers internal circuitry and supports programmable reset timeout (CT pin), soft-start (SS pin), and synchronization (SYNC pin) across both modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V ±1.2% (typical) over -40°C to +125°C; guaranteed 4.89V–5.09V at 10mA load in LDO mode. |
| Switching Frequency | Fixed 330kHz (MAX5097 variant); enables compact 22μH inductor and reduces EMI fundamental below AM band edge. |
| Buck Output Current | 600mA continuous; limited by thermal dissipation in 16-pin TQFN package (2.6W @ TA = +70°C). |
| LDO Output Current | 100mA max; constrained by package power handling - dropout voltage is 0.37V at 100mA (5V version). |
| Quiescent Current | 41μA typical in LDO mode at 100μA load; drops to 6μA in shutdown (VEN = 0V). |
| Input Voltage Range | 5–40V in buck mode; 4–40V in LDO mode; includes 45V transient tolerance on IN pin (1ms). |
| Protection Features | Thermal shutdown at +165°C (20°C hysteresis), short-circuit current limit (150–500mA), output overload, and open-drain RESET with programmable timeout. |
Pinout & Package
MAX5097BATE+ is housed in a thermally enhanced 16-pin TQFN-EP package (3mm × 3mm, 0.5mm pitch) with exposed pad (EP) for improved heat dissipation. The EP must be soldered to a large SGND copper plane but not used as electrical ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 15,16) | Power Input | Dual-input pins accept 5–40V supply; require parallel ceramic + aluminum bypass capacitors to handle ripple current. |
| PGND (Pin 1) | Power Ground | Return path for high-side switch and freewheeling diode; must connect input/output capacitor grounds and diode anode here. |
| SGND (Pin 2) | Signal Ground | Analog reference ground; tie to PGND near input capacitor return to minimize noise coupling into feedback path. |
| OUT (Pin 11) | Regulated Output | Delivers 5V output; requires ≥22μF low-ESR capacitor to PGND for stability in both buck and LDO modes. |
| LX (Pins 13,14) | Switch Node | Drain of internal p-channel MOSFET; connects to inductor and freewheeling diode cathode; swings from -1V to VIN+0.3V. |
| ADJ (Pin 10) | Feedback Reference | Connected to SGND for fixed 5V output (MAX5097B); sets VOUT = 1.237V × (1 + R1/R2) when used with resistor divider. |
| LDO/BUCK (Pin 9) | Mode Control | Logic-selectable: >2V = LDO mode (100μA IQ), <0.8V = buck mode (330kHz); transitions occur within 100μs or 32 clock cycles. |
| EN (Pin 12) | Enable Input | Active-high logic input (1.4V threshold); internally pulldown; drives device into 6μA shutdown when low or floating. |
| RESET (Pin 3) | Open-Drain Reset | Asserts low when VOUT falls below 90% nominal; timeout programmable via CT capacitor; compatible with TTL logic when pulled up. |
| COMP (Pin 8) | Loop Compensation | Connect external RC network for buck-mode stability; not used in LDO mode - no external components required. |
| SS (Pin 6) | Soft-Start Timing | 5μA current source charges external capacitor; controls monotonic VOUT ramp-up time; discharged instantly on EN toggle. |
| CT (Pin 7) | Reset Timeout | 1μA current source charges external capacitor to set RESET active duration; VCT_TH = 1.237V defines timeout threshold. |
| SYNC (Pin 5) | Frequency Sync | Accepts external clock (300–500kHz for MAX5097); synchronizes switching to avoid beat frequencies; tie to SGND if unused. |
| BP (Pin 4) | Internal Bias Regulator | 4V ±7% output powers internal circuitry; bypass with ≥1μF ceramic cap close to pin; max 2mA external load. |
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 - eliminates need for external mode control logic. |
| Automotive-Grade Thermal Robustness | Rated for -40°C to +125°C operation with thermal shutdown at +165°C and 20°C hysteresis; dissipates 2.6W at TA = +70°C in TQFN package. |
| Integrated Power-On Reset | Open-drain RESET output with user-programmable timeout (via CT capacitor); asserts low on VOUT drop below 90%, releases after timeout when VOUT exceeds 92%. |
| Programmable Soft-Start & Tracking | SS pin supports externally adjustable startup ramp and multi-rail voltage tracking - multiple MAX5097BATE+ devices can rise/fall in sync to prevent core/I/O sequencing violations. |
| Robust Protection Suite | Includes undervoltage lockout (3.65V BP threshold), short-circuit current limit (150–500mA), overtemperature shutdown, and 45V transient tolerance on IN pin. |
Applications
| Automotive Body Control Module (BCM) | Infotainment System Power Rail |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and sensor interfaces in door modules or lighting controllers during vehicle key-off state. IC Role / Device Role / Timing Role: Dual-mode regulator supplies 5V to MCU in LDO mode (41μA IQ) during sleep, then switches to buck mode upon wake-up command. Use Value: Enables >10-year battery life in always-on BCM applications by reducing quiescent current 10× vs. standard buck-only converters. |
Use Scenario: Generating stable 5V rail for audio DSP, display controller, and USB peripherals in head-unit systems with variable load profiles. IC Role / Device Role / Timing Role: Provides primary 5V supply with seamless transition between buck (high-efficiency playback) and LDO (low-noise standby) modes. Use Value: Eliminates audible switching noise in audio paths during low-load conditions while maintaining 85% efficiency at full load. |
| Industrial Sensor Hub | Telematics Control Unit (TCU) |
Use Scenario: Powering isolated RS-485 transceivers, ADCs, and wireless SoCs in battery-backed industrial monitoring nodes. IC Role / Device Role / Timing Role: Delivers regulated 5V from wide-input 12–36V DC bus; enters LDO mode during sensor sampling intervals to reduce EMI. Use Value: Meets CISPR-25 Class 5 EMI requirements without additional shielding due to synchronized 330kHz operation and low-noise LDO fallback. |
Use Scenario: Supplying 5V to cellular modem, GNSS receiver, and secure boot processor in vehicle-to-cloud communication gateways. IC Role / Device Role / Timing Role: Acts as main system regulator with RESET supervision and programmable soft-start to ensure deterministic boot sequence. Use Value: Guarantees clean power-up timing across all subsystems via CT-programmed reset timeout and SS-synchronized voltage ramps. |
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 |
|---|---|---|---|
| LM5137QPWPRQ1 | Single-mode 65V synchronous buck only; no LDO mode; higher 2.1A current rating; requires external MOSFETs. | Used where high-current buck efficiency is prioritized over ultra-low-IQ sleep performance; lacks integrated reset or soft-start. | Select when >600mA load or >40V input is required; avoid if key-off quiescent current <50μA is mandatory. |
| TPS62840DLCR | Single-mode 6V buck with 300nA shutdown IQ; no LDO mode; 1.4A output; fixed 3.3V/5V options only; no SYNC or RESET. | Suitable for ultra-low-power IoT sensors; lacks automotive temp range and high-voltage input capability. | Choose for battery-powered sub-6V systems needing nanoscale shutdown current; not viable for 12V/24V automotive rails. |
Compared with LM5137QPWPRQ1 and TPS62840DLCR, the MAX5097BATE+ uniquely combines 40V input tolerance, 600mA buck capability, 41μA LDO quiescent current, integrated RESET, and automotive temperature rating - making it the only single-chip solution for cost-sensitive, space-constrained automotive body electronics requiring adaptive efficiency.
Availability
MAX5097BATE+ is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power supplies, industrial sensor hubs, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX5097BATE+ 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 MAX5097BATE+ belongs to Maxim's automotive-grade dual-mode DC-DC converter family, engineered specifically to replace discrete buck + LDO solutions in 12V/24V vehicle systems where low-key-off current and robust transient immunity are critical.
FAQ
What output voltage does the MAX5097BATE+ deliver?
The MAX5097BATE+ delivers a factory-trimmed fixed 5V output with ±1.2% accuracy over -40°C to +125°C. In buck mode, it maintains 4.89V–5.09V at 10mA load; in LDO mode, output regulation holds within 0.37V dropout at 100mA. The ADJ pin is tied to SGND internally for this variant - no external resistors needed.
How does the MAX5097BATE+ switch between buck and LDO modes?
The MAX5097BATE+ switches modes via the LDO/BUCK pin: driving it above 2V forces immediate LDO activation (100μs delay), while pulling it below 0.8V initiates buck operation after 32 internal clock cycles. This transition is fully supported in both directions and requires no external circuitry - the same pass element and reference are reused across modes.
What is the maximum continuous output current for the MAX5097BATE+ in buck mode?
The MAX5097BATE+ supports 600mA continuous output current in buck mode, limited by thermal dissipation in its 16-pin TQFN package. At TA = +70°C, it dissipates up to 2.6W; derating is 33.3mW/°C above +70°C. Actual current capability depends on PCB layout, airflow, and ambient temperature - refer to θJA = 30.0°C/W for thermal design.
Does the MAX5097BATE+ include built-in protection features?
Yes, the MAX5097BATE+ integrates thermal shutdown (+165°C trip, 20°C hysteresis), short-circuit current limiting (150–500mA), output overload detection, input undervoltage lockout (3.65V BP threshold), and 45V transient tolerance on the IN pin. All protections operate identically in both buck and LDO modes.
Can the MAX5097BATE+ be synchronized to an external clock?
Yes, the MAX5097BATE+ accepts an external synchronization signal on the SYNC pin, supporting frequencies from 300kHz to 500kHz. This allows EMI reduction through frequency dithering or alignment with system clocks. When not used, SYNC must be tied to SGND - leaving it floating may cause erratic operation.
MAX5097BATE+ 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 (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+ FAQ
1.How can I place an order for MAX5097BATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5097BATE+ 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+ reliable?
The price and inventory of MAX5097BATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5097BATE+ is usually 5 days.
3.What payment methods are accepted for MAX5097BATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5097BATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5097BATE+?
MAX5097BATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5097BATE+ 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+?
For technical support, including MAX5097BATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5097BATE+ requirements.
6.How does Aetrix verify that MAX5097BATE+ is sourced from the original manufacturer or authorized distributors?
All MAX5097BATE+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX5097BATE+?
All MAX5097BATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5097BATE+, 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+ part is unused and in its original packaging.
Return procedure for MAX5097BATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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