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Analog Devices Inc./Maxim Integrated MAX5098AATJ+T
- Part No.:
- MAX5098AATJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX5098AATJ+T.pdf
- Description:
- IC REG BUCK BOOST ADJ DL 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,225
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Product details
Overview
MAX5098AATJ+T from Maxim Integrated is a dual-output, high-frequency DC-DC converter with integrated n-channel power MOSFETs configurable as buck or boost regulators, delivering up to 2A (converter 1) and 1A (converter 2), supporting 4.5V–19V input range, 80V load-dump transient protection, and 200kHz–2.2MHz adjustable switching frequency for industrial power systems.
For engineers reviewing the MAX5098AATJ+T datasheet, MAX5098AATJ+T pinout, MAX5098AATJ+T application, or MAX5098AATJ+T equivalent, key selection criteria include dual independent enable/control (EN1/EN2), out-of-phase operation to reduce input ripple, four-phase master-slave synchronization via CKO/SYNC, and integrated load-dump gate driver for external n-channel MOSFET protection in automotive and industrial battery-supplied systems.
Technical Context
The MAX5098AATJ+T implements voltage-mode PWM control with external compensation at each COMPx output, enabling precise loop tuning for fast transient response and stable regulation across wide input/output conditions. Its dual converters operate 180° out-of-phase by default (FSEL_1 = VL), minimizing input capacitor RMS current and EMI.
It integrates a dedicated load-dump protection subsystem: an internal charge pump drives the GATE pin to bias an external n-channel MOSFET during overvoltage transients up to 80V on IN_HIGH, while V+ to IN_HIGH clamping (1.2–2.5V differential) and IN_HIGH clamp voltage (19–21V) provide layered fault containment without disabling core regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V–5.5V or 5.2V–19V - supports dual-rail industrial supplies and battery-backed systems with 80V transient tolerance on IN_HIGH. |
| Switching Frequency | 200kHz–2.2MHz - programmable via ROSC resistor; enables trade-offs between efficiency, size (smaller inductors/caps), and EMI profile. |
| Output Current (Buck) | 2A (CONV1), 1A (CONV2) - limited by thermal dissipation in 32-pin TQFN; peak drain currents rated at 5A/3A for 1ms. |
| On-Resistance (HS-MOSFET) | 195mΩ (CONV1), 280mΩ (CONV2) at 5.2V BST–SOURCE - defines conduction loss and thermal headroom at full load. |
| FB Regulation Accuracy | 0.785V–0.814V (–40°C to +125°C) - tight reference ensures ±1.5% output voltage accuracy over temperature and line/load. |
| Load-Dump Protection | Handles 80V transients on IN_HIGH - achieved via internal charge pump driving external n-MOSFET; no external shunt required. |
| Thermal Performance | θJA = 29.0°C/W; 2.759W max dissipation at +70°C - requires exposed pad soldering and PCB copper pour for reliable 125°C operation. |
Pinout & Package
MAX5098AATJ+T is housed in a thermally enhanced, RoHS-compliant 32-pin TQFN package (5mm × 5mm) with exposed pad (EP) for optimal heat transfer. The package supports continuous operation from –40°C to +125°C ambient and dissipates up to 2.759W at +70°C with proper PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 32 (SOURCE2) | Converter 2 MOSFET source node | Connect to switched inductor node (buck) or PGND (boost); defines low-side return path and current sensing reference. |
| 2, 3 (DRAIN2) | Converter 2 MOSFET drain node | Connect to input rail (buck high-side) or inductor/diode junction (boost low-side); carries full output current and switching stress. |
| 4 (PGOOD2) | Open-drain power-good indicator | Asserts low when VOUT2 drops below 92.5% of setpoint; used for sequencing with EN1 and system monitoring. |
| 10 (GATE) | External load-dump MOSFET gate driver | Outputs ~IN_HIGH + 9V (typ) to drive n-channel protection FET; active only when ON/OFF = high and IN_HIGH overvoltage detected. |
| 11 (ON/OFF) | n-Channel switch enable control | Drives external load-dump FET gate; pulling low disables both converters and reduces quiescent current to 7µA (typ). |
| 13 (V+) | Main supply input | Primary power rail (5.2V–19V); bypassed with ≥1µF ceramic cap; connects to IN_HIGH/VL for 4.5V–5.5V operation. |
| 28 (CKO) | Master clock output | Provides 2× converter frequency, 90° phase-shifted signal to synchronize second MAX5098A in four-phase configuration. |
| EP (Exposed Pad) | Thermal and electrical ground | Must be soldered to SGND plane; primary thermal path; not a substitute for signal/power ground connections. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent buck/boost configuration | Each converter supports selectable topology via external component placement-enables flexible rail generation (e.g., 5V buck + 12V boost from 12V bus). |
| Four-phase master-slave synchronization | CKO output drives SYNC of second device, interleaving four switching phases to halve input ripple current and reduce EMI filtering requirements. |
| Integrated load-dump protection subsystem | Internal charge pump + GATE driver eliminates need for external high-voltage gate driver IC; supports robust 80V transient handling in automotive/industrial environments. |
| Voltage-mode control with external compensation | COMP1/COMP2 pins allow custom loop shaping for optimized transient response and stability across varying output capacitance and load conditions. |
| Digital soft-start/soft-stop | 64-step internal ramp (2048 clock cycles) prevents inrush current and output overshoot during startup/shutdown-critical for sensitive downstream loads. |
| Individual enable and power-good outputs | EN1/EN2 and PGOOD1/PGOOD2 support precise power sequencing (e.g., VOUT2 powers logic before enabling VOUT1 for analog circuitry). |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powering mixed-signal circuits (microcontroller, CAN transceiver, sensors) in programmable logic controllers operating from 12V/24V battery or industrial SMPS rails. IC Role / Device Role / Timing Role: Dual-regulator PMIC providing isolated 5V (logic) and 3.3V (I/O) rails with independent sequencing and fault reporting. Use Value: 80V load-dump protection prevents shutdown during alternator dump events; out-of-phase operation reduces input capacitor stress and EMI. |
Use Scenario: Generating multiple regulated voltages in vehicle body electronics subject to ISO 7637-2 pulse 5a/b transients. IC Role / Device Role / Timing Role: Primary DC-DC controller managing 5V microcontroller core and 12V actuator drivers, with coordinated startup via EN2→EN1 sequencing. Use Value: Integrated GATE driver replaces discrete charge-pump + level-shifter solution; reduces BOM count and layout area while maintaining 125°C operation. |
| Ruggedized IoT Gateway | Factory Automation Sensor Hub |
|
Use Scenario: Power management for edge gateway devices deployed in harsh factory environments with unstable 24V DC distribution. IC Role / Device Role / Timing Role: Dual-output regulator supplying 3.3V (Wi-Fi module) and 5V (USB peripherals), synchronized to system clock via SYNC input. Use Value: 2.2MHz max switching frequency allows use of ultra-small 1.0µH inductors; CKO-driven multi-phase scaling supports future higher-power variants. |
Use Scenario: Compact sensor aggregation node powering analog front-ends, ADCs, and isolated RS-485 transceivers from unregulated 12–24V field wiring. IC Role / Device Role / Timing Role: Configurable buck-boost regulator generating 3.3V (sensor interface) and adjustable 10V (analog bias), with FB-based precision feedback. Use Value: ±1.5% FB accuracy and 0.8V reference ensure stable sensor excitation; thermal shutdown (+165°C) protects against enclosure overheating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5143AQRHBRQ1 | Single synchronous buck controller (no boost mode); requires external high-side/low-side MOSFETs; no integrated load-dump protection. | Targeted at high-efficiency automotive buck-only designs; lacks dual independent topology flexibility and transient protection subsystem. | Select when only high-current buck conversion is needed and external FETs are acceptable; not suitable for boost or load-dump-critical applications. |
| TPS54560BQPWPRQ1 | Single 60V buck converter with integrated 0.57Ω high-side MOSFET; fixed 500kHz frequency; no boost capability or load-dump protection. | Designed for cost-sensitive automotive front-end supplies; lacks dual output, configurability, and industrial-grade transient resilience. | Choose for simple single-rail 5–60V input systems where dual output and topology flexibility are unnecessary. |
Compared with LM5143AQRHBRQ1 and TPS54560BQPWPRQ1, the MAX5098AATJ+T uniquely combines dual independent buck/boost operation, integrated 80V load-dump protection, and four-phase synchronization-making it the only option that meets full industrial transient immunity and multi-topology design requirements without external protection ICs or controllers.
Availability
MAX5098AATJ+T is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, ruggedized IoT gateways, and factory automation sensor hubs requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MAX5098AATJ+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 demanding industrial, automotive, and communications applications.
The MAX5098A product line delivers highly integrated dual DC-DC controllers with built-in load-dump protection and flexible topology support-designed specifically for industrial and automotive systems requiring robustness against battery transients and compact multi-rail power solutions.
FAQ
What is the maximum supported switching frequency for MAX5098AATJ+T?
The MAX5098AATJ+T supports a programmable switching frequency range from 200kHz to 2.2MHz, set by an external resistor (ROSC) connected to the OSC pin. At ROSC = 6.81kΩ with FSEL_1 = VL, the typical frequency is 1.85MHz. Operation up to 2.2MHz enables use of smaller passive components and reduced board area in space-constrained industrial designs.
How does the load-dump protection function in MAX5098AATJ+T?
The MAX5098AATJ+T implements load-dump protection using an internal charge pump that drives the GATE pin to bias an external n-channel MOSFET during overvoltage events on IN_HIGH. When a transient exceeds the clamp threshold (~20V), the GATE output rises to ~IN_HIGH + 9V, turning on the external FET to absorb energy. This architecture handles up to 80V transients without requiring external shunt regulators or TVS diodes.
Can MAX5098AATJ+T operate in boost configuration for both outputs?
Yes, MAX5098AATJ+T supports independent boost configuration for each output. For boost operation, DRAINx connects to the inductor-diode junction and SOURCEx connects to PGND_. Output voltage is adjustable from VIN to 28V using the FBx feedback divider. This flexibility allows generation of higher-voltage rails (e.g., 12V or 15V) from lower-input sources like 5V or 12V batteries-verified in the MAX5098A datasheet Figure 6.
What is the purpose of the CKO pin on MAX5098AATJ+T?
The CKO (Clock Output) pin on MAX5098AATJ+T provides a synchronized clock signal at twice the individual converter frequency and 90° phase shift relative to converter 1. It is used to daisy-chain a second MAX5098AATJ+T in master-slave configuration, enabling four-phase interleaved operation. This reduces input ripple current by ~50% and lowers EMI filter requirements compared to single- or dual-phase designs.
Does MAX5098AATJ+T include thermal protection?
Yes, MAX5098AATJ+T incorporates thermal shutdown protection that activates at +165°C junction temperature with 20°C hysteresis. When triggered, the device disables both converters and holds PGOOD outputs low until junction temperature falls below +145°C. This safeguard ensures reliability in enclosed industrial enclosures or high-ambient-temperature deployments where heatsinking is limited.
MAX5098AATJ+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 19V
- Voltage - Output (Min/Fixed):
- 0.8V, 4.5V
- Voltage - Output (Max):
- 16.15V, 28V
- Current - Output:
- 1.75A (Switch), 2.8A (Switch)
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (5x5)
MAX5098AATJ+T FAQ
1.How can I place an order for MAX5098AATJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5098AATJ+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 MAX5098AATJ+T reliable?
The price and inventory of MAX5098AATJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5098AATJ+T is usually 5 days.
3.What payment methods are accepted for MAX5098AATJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5098AATJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5098AATJ+T?
MAX5098AATJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5098AATJ+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 MAX5098AATJ+T?
For technical support, including MAX5098AATJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5098AATJ+T requirements.
6.How does Aetrix verify that MAX5098AATJ+T is sourced from the original manufacturer or authorized distributors?
All MAX5098AATJ+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 MAX5098AATJ+T meets industry standards.
7.What is the process for return or replacement of MAX5098AATJ+T?
All MAX5098AATJ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5098AATJ+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 MAX5098AATJ+T part is unused and in its original packaging.
Return procedure for MAX5098AATJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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