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Analog Devices Inc./Maxim Integrated MAX5096AAUP+
- Part No.:
- MAX5096AAUP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX5096AAUP+.pdf
- Description:
- IC REG BCK ADJ/FIX 600MA 20TSSOP
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Inventory:4,300
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Product details
Overview
MAX5096AAUP+ from Maxim Integrated is a dual-mode 40V, 600mA buck converter with integrated low-quiescent-current LDO regulator functionality. It operates as a high-efficiency PWM switcher (135kHz fixed frequency) under heavy load and transitions to LDO mode (41μA typical IQ at 100μA load) during light-load or key-off conditions. Designed for automotive power systems, it delivers stable 5V output with ±1.5% regulation over -40°C to +125°C.
For engineers reviewing the MAX5096AAUP+ datasheet, MAX5096AAUP+ pinout, MAX5096AAUP+ application, or MAX5096AAUP+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal performance (θJA = 46.0°C/W), and real-world dual-mode transition timing (100μs LDO entry, 32 clock cycles buck entry).
Technical Context
The MAX5096AAUP+ implements current-mode PWM control in buck mode with internal 0.9Ω p-channel high-side switch and external freewheeling diode rectification. Its dual-mode architecture shares the same pass element and reference between buck and LDO paths but uses separate error amplifiers with distinct compensation schemes - COMP for buck, no external compensation required for LDO.
Mode selection is controlled via the LDO/BUCK input, which triggers deterministic transitions: rising edge initiates LDO operation after 100μs delay; falling edge enables buck mode after 32 internal clock cycles. The device integrates a 4V BP regulator (±7% accuracy), programmable soft-start (via SS capacitor), and open-drain RESET with capacitor-adjustable timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range (Buck) | +5V to +40V - supports wide automotive battery range including cold-crank transients up to +45V absolute max. |
| Input Voltage Range (LDO) | +4V to +40V - enables start-stop system operation down to 4V battery voltage without dropout. |
| Output Current (Buck) | 600mA continuous - sufficient for microcontroller core rails, CAN transceivers, and sensor interfaces. |
| Output Current (LDO) | 100mA continuous - adequate for low-power MCU standby domains while maintaining 41μA quiescent current. |
| Switching Frequency | 135kHz fixed - keeps fundamental and third harmonic below AM radio band (450kHz), minimizing EMI in infotainment systems. |
| Thermal Performance | θJA = 46.0°C/W (20-pin TSSOP-EP) - enables 1.7W dissipation at TA = +70°C, validated for under-hood automotive placement. |
| Protection Features | Thermal shutdown (+165°C, 20°C hysteresis), short-circuit (500mA limit), overload, and UVLO (3.65V BP threshold) - ensures robust field operation. |
Pinout & Package
MAX5096AAUP+ is housed in a thermally enhanced 20-pin TSSOP-EP package with exposed pad connected to SGND for improved heat dissipation. Pin functions are validated per Maxim's official pin description table and schematic diagrams.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 15,16,17) | Regulator Input | Accepts +4V to +40V input; requires parallel ceramic + aluminum bypass capacitors to handle ripple current. |
| PGND (Pin 4) | Power Ground | Return path for high-side switch; must connect input cap, diode anode, and output cap return to minimize noise coupling. |
| SGND (Pin 5) | Signal Ground | Reference for feedback, reset, and control circuits; tied to PGND near input capacitor for clean ground separation. |
| LX (Pins 13,14) | Switch Node | Drain of internal p-channel MOSFET; connects to inductor and freewheeling diode anode; swings from -1V to VIN+0.3V. |
| OUT (Pin 11) | Regulator Output | Delivers regulated output; requires ≥22μF low-ESR capacitor to PGND for stability in both buck and LDO modes. |
| ADJ (Pin 10) | Feedback Reference | Sets output voltage: grounded for fixed 5V (MAX5096B variant); 1.237V reference enables 1.24–11V adjustable range via resistor divider. |
| LDO/BUCK (Pin 9) | Mode Select Control | Logic-high (>2V) forces LDO mode; logic-low (<0.8V) enables buck mode; transitions are deterministic and externally controllable. |
| EN (Pin 12) | Enable Input | Active-high enable with 1.4V threshold; internal 0.5μA pulldown allows direct connection to microcontroller GPIO for precise sequencing. |
| RESET (Pin 3) | Open-Drain Reset Output | Asserts low when VOUT drops below 90% nominal; timeout period set by CT capacitor; compatible with standard logic-level pullups. |
| COMP (Pin 8) | Buck Loop Compensation | Connects external RC network to stabilize current-mode buck loop; not used in LDO mode. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Mode Operation | Automatically switches between 85% efficient buck mode (600mA) and 41μA IQ LDO mode (100mA) based on load and LDO/BUCK pin state. |
| Automotive Temperature Range | Guaranteed operation from -40°C to +125°C junction temperature, qualified per AEC-Q100 stress test requirements. |
| Programmable Soft-Start | Single external capacitor (CSS) sets monotonic startup time; prevents inrush current glitches in high-impedance supply systems. |
| Integrated Power-On Reset | Capacitor-adjustable timeout (CCT) with 92% VOUT rising threshold and 90% falling threshold ensures reliable MCU initialization. |
| External Frequency Sync | Synchronization input (SYNC) accepts 120–500kHz external clock, enabling EMI reduction via spread-spectrum or channel-aware frequency hopping. |
Applications
| Automotive Infotainment Power | Body Control Module (BCM) Core Rail |
|---|---|
|
Use Scenario: Powering AM/FM tuner ICs and DSP processors in vehicle head units where EMI sensitivity is critical. IC Role / Device Role / Timing Role: Primary 5V buck regulator with 135kHz switching frequency to keep harmonics below 450kHz and avoid AM band interference. Use Value: Enables direct integration into infotainment PCBs without additional EMI filtering, reducing BOM cost and board area. |
Use Scenario: Supplying microcontroller core voltage in door modules and seat controllers requiring low standby current. IC Role / Device Role / Timing Role: Dual-mode regulator that transitions to LDO mode during vehicle key-off to maintain <50μA system quiescent draw. Use Value: Eliminates need for separate LDO and buck ICs, cutting component count and simplifying thermal design in space-constrained modules. |
| Engine Control Unit (ECU) Sensor Interface | Telematics Control Unit (TCU) Backup Power |
|
Use Scenario: Providing stable 5V rail for oxygen sensors, knock sensors, and CAN transceivers in harsh under-hood environments. IC Role / Device Role / Timing Role: Automotive-grade DC-DC converter with thermal shutdown (+165°C) and input UVLO (3.65V) for engine bay reliability. Use Value: Withstands 125°C ambient with 1.7W dissipation capability in TSSOP-EP package, eliminating need for heatsinks or forced air. |
Use Scenario: Maintaining GPS module and cellular modem operation during main battery disconnect in emergency call systems. IC Role / Device Role / Timing Role: LDO-mode regulator powered from backup supercapacitor or secondary battery, delivering 100mA at ultra-low IQ. Use Value: 41μA typical quiescent current extends backup runtime significantly compared to standard buck-only solutions. |
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 |
|---|---|---|---|
| MAX5097AAUP+ | 330kHz fixed switching frequency vs. 135kHz; identical pinout, package, and dual-mode architecture. | Better suited for space-constrained designs requiring smaller inductors/capacitors; higher EMI baseline due to 3rd harmonic at 990kHz. | Select MAX5097AAUP+ when board area is limited and AM-band EMI is not a concern. |
| LM5165QPWPRQ1 | Single-mode 65V synchronous buck only; no integrated LDO mode; 100μA IQ in shutdown vs. 41μA in LDO mode. | Lacks automatic light-load mode transition; requires external LDO and control logic for key-off current optimization. | Choose LM5165QPWPRQ1 only if full 65V input range is mandatory and dual-mode operation is handled externally. |
Compared with MAX5097AAUP+, the MAX5096AAUP+ offers lower EMI in AM-sensitive zones but larger magnetics; versus LM5165QPWPRQ1, it eliminates external LDO dependency and reduces total solution size for automotive start-stop systems.
Availability
MAX5096AAUP+ is available at Aetrix Electronics and suitable for automotive infotainment systems, body control modules, engine control units, and telematics applications requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX5096AAUP+ 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 needing seamless transition between high-efficiency switching and ultra-low-IQ linear regulation - addressing start-stop, always-on, and EMI-sensitive use cases.
FAQ
What is the maximum input voltage rating for MAX5096AAUP+?
The MAX5096AAUP+ supports a continuous input voltage range of +5V to +40V in buck mode and +4V to +40V in LDO mode. Its absolute maximum transient rating is +45V for 1ms, making it suitable for automotive battery systems experiencing cold-crank and load-dump events. This rating is confirmed in the Absolute Maximum Ratings table of the official datasheet.
Does MAX5096AAUP+ require external compensation in LDO mode?
No, MAX5096AAUP+ does not require external compensation in LDO mode. The LDO path uses an internal error amplifier with fixed compensation, unlike the buck mode which requires external RC components on the COMP pin. This simplifies design for applications that rely on LDO operation during key-off or low-power states.
How does the LDO/BUCK pin control mode transitions in MAX5096AAUP+?
The LDO/BUCK pin on MAX5096AAUP+ is a digital control input: driving it high (>2V) forces immediate LDO mode activation after a 100μs delay, while pulling it low (<0.8V) initiates buck mode after 32 internal clock cycles. This deterministic timing allows precise coordination with microcontroller wake-up sequences in automotive systems.
What output voltage options are supported by MAX5096AAUP+?
MAX5096AAUP+ is the 5V fixed-output variant (MAX5096B subfamily). It delivers 4.85V to 5.12V over full load and temperature range. When configured in adjustable mode via the ADJ pin, it supports 1.24V to 11V outputs using an external resistor divider with 1.237V internal reference - confirmed in Electrical Characteristics Table 1.
Is MAX5096AAUP+ qualified for automotive applications?
Yes, MAX5096AAUP+ is explicitly rated for the -40°C to +125°C automotive temperature range and packaged in a thermally enhanced 20-pin TSSOP-EP. Its specifications - including thermal shutdown (+165°C), UVLO hysteresis, and 100% production testing at temperature extremes - meet AEC-Q100 requirements for automotive power management ICs.
MAX5096AAUP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX5096AAUP+ FAQ
1.How can I place an order for MAX5096AAUP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5096AAUP+ 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 MAX5096AAUP+ reliable?
The price and inventory of MAX5096AAUP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5096AAUP+ is usually 5 days.
3.What payment methods are accepted for MAX5096AAUP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5096AAUP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5096AAUP+?
MAX5096AAUP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5096AAUP+ 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 MAX5096AAUP+?
For technical support, including MAX5096AAUP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5096AAUP+ requirements.
6.How does Aetrix verify that MAX5096AAUP+ is sourced from the original manufacturer or authorized distributors?
All MAX5096AAUP+ 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 MAX5096AAUP+ meets industry standards.
7.What is the process for return or replacement of MAX5096AAUP+?
All MAX5096AAUP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5096AAUP+, 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 MAX5096AAUP+ part is unused and in its original packaging.
Return procedure for MAX5096AAUP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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