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Analog Devices Inc./Maxim Integrated MAX17578ATC+
- Part No.:
- MAX17578ATC+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17578ATC+.pdf
- Description:
- IC REG BUCK ADJ 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:555
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Product details
Overview
The MAX17578ATC+ from Analog Devices is a high-voltage, synchronous, inverting DC-DC converter IC with integrated MOSFETs, peak current-mode control, and internal compensation. It delivers up to 1A output current, supports adjustable negative output voltages from –0.9V to –36V, operates across a 4.5V to (60V – |VOUT|) input range, and achieves 90.6% peak efficiency in DCM mode - ideal for industrial gate-drive circuits and high-voltage single-board systems.
For engineers reviewing the MAX17578ATC+ datasheet, MAX17578ATC+ pinout, MAX17578ATC+ application, or MAX17578ATC+ equivalent, key selection considerations include its system-ground-referenced EN/UVLO and RESET pins, DCM operation for light-load efficiency, ±1.3% feedback regulation accuracy over –40°C to +125°C, 400kHz–2.2MHz programmable switching frequency, and TDFN-EP (3mm × 3mm) package with exposed thermal pad.
Technical Context
The MAX17578ATC+ implements a peak current-mode control architecture with internal loop compensation and operates exclusively in discontinuous conduction mode (DCM) to maximize light-load efficiency. Its control logic disables negative inductor current, eliminating reverse conduction losses while maintaining stable regulation across wide input/output voltage combinations.
It integrates dual nMOSFETs (RDS(on)H = 330–660 mΩ, RDS(on)L = 163–325 mΩ), a 5V internal LDO (VCC), and system-ground-referenced I/O (EN/UVLO, RESET, RT/SYNC) - enabling direct interfacing with microcontrollers without level shifters. The device features hiccup-mode OCP, monotonic startup into prebiased outputs, and built-in output monitoring via RESET assertion at VFB < 92% of regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Inverting synchronous buck-boost - generates regulated negative output from positive input without external inverting transformer or charge pump. |
| Output Voltage Range | –0.9V to –36V - adjustable via FB resistor divider; supports rail generation for op-amp biasing, sensor interfaces, and gate drivers requiring negative supply. |
| Input Voltage Range | 4.5V to (60V – |VOUT|) - enables use with 12V/24V/48V industrial buses while maintaining safe operating margin relative to output magnitude. |
| Max Output Current | 1A continuous - sufficient for driving multiple MOSFET gates or powering isolated analog front-ends in motion control systems. |
| Switching Frequency | 400kHz to 2.2MHz - programmable via RT/SYNC resistor or external clock sync; higher frequencies allow smaller magnetics and reduced solution footprint. |
| Feedback Accuracy | ±1.3% over –40°C to +125°C - ensures stable output regulation across extended industrial temperature environments without calibration. |
| Shutdown Current | 6.2μA - minimizes standby power loss in battery-backed or energy-sensitive applications such as wall-transformer regulation. |
Pinout & Package
The MAX17578ATC+ is housed in a compact 12-pin TDFN-EP package (3mm × 3mm, 0.5mm pitch) with an exposed thermal pad (EP) connected to SOUT for enhanced heat dissipation. Pin assignment is validated per official Analog Devices pin configuration diagram and functional description.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power input node | Accepts 4.5V–(60V–|VOUT|); requires ≥2.2μF X7R ceramic decoupling close to pin for EMI suppression and transient response. |
| EN/UVLO | Enable & input UVLO control | System-ground-referenced; rising threshold 1.229V - eliminates need for level shifter when driven by MCU GPIO or resistive divider from IN. |
| RESET | Open-drain fault status output | Asserts low when VFB falls below 92% of target; deasserts after 1024 cycles once VFB exceeds 95% - provides reliable power-good signaling for downstream logic. |
| SS | Soft-start timing input | Capacitor-to-SOUT sets ramp time; prevents inrush current during startup and enables monotonic rise into prebiased outputs. |
| VCC | Internal 5V LDO output | Powers internal circuitry; bypassed with 2.2μF ceramic to SOUT; not intended for external loading. |
| RT/SYNC | Frequency programming / clock sync | Resistor-to-SOUT sets fSW (400kHz–2.2MHz); accepts external clock (1.1×–1.4× fSW) for synchronized multi-rail systems. |
| FB | Voltage feedback input | Monitors output via resistor divider; reference voltage 0.9V ±1.2%; enables precise negative rail adjustment with minimal external components. |
| SOUT | Control circuit reference node | Reference for internal error amplifier, VCC LDO, and RESET comparator - must connect Kelvin-style to output capacitor for accurate sensing. |
| GND | System ground return | Low-impedance connection point for all ground paths; tie to power ground plane at single point to minimize noise coupling. |
| BST | Bootstrap capacitor terminal | Connects 0.1μF ceramic to LX; supplies gate drive voltage for high-side MOSFET - critical for proper switching under high-duty-cycle conditions. |
| LX | Switching node | Drives external inductor; high-impedance during shutdown; requires low-inductance layout to reduce ringing and EMI. |
| OUT | Negative output terminal | Source of regulated negative voltage; connects directly to output capacitor cathode and load return - forms return path for low-side MOSFET current. |
Key Features
| Feature | Design Value |
|---|---|
| Discontinuous Conduction Mode (DCM) | Enables >90% efficiency at light loads (<100mA) without forced PWM or burst-mode artifacts - ideal for intermittent gate-drive or sensor-bias applications. |
| System-Ground-Referenced I/O Pins | EN/UVLO, RESET, and RT/SYNC referenced to GND - removes need for external level shifters, simplifying interface with standard microcontrollers and logic families. |
| Integrated Dual nMOSFETs | Eliminates external power switches; RDS(on)H/RDS(on)L optimized for 1A operation - reduces BOM count, PCB area, and thermal design complexity. |
| Hiccup-Mode Overcurrent Protection | Triggers at 2.65A runaway current or VFB < 0.58V; limits average power dissipation during short-circuit - protects IC and board under sustained overload without thermal runaway. |
| Prebiased Output Startup | Prevents sinking current from existing negative rail during startup - essential for hot-swap or redundant power systems where output may be precharged. |
Applications
| Industrial Control Power Supply | Gate-Drive Circuits |
|---|---|
Use Scenario: Providing isolated negative bias for high-side IGBT or SiC MOSFET drivers in PLC I/O modules and motor drives. IC Role / Device Role / Timing Role: Inverting DC-DC regulator generating –15V rail from 24V bus; delivers 1A peak current during gate turn-on transitions. Use Value: Enables robust gate control with fast edge rates and low shoot-through risk, leveraging DCM efficiency during idle periods between switching events. | Use Scenario: Generating dual-rail supplies (±12V) for precision op-amps and analog comparators in industrial signal conditioning circuits. IC Role / Device Role / Timing Role: Negative-output converter paired with standard buck regulator; FB accuracy ±1.3% ensures matched gain and offset stability over temperature. Use Value: Eliminates need for discrete inverting charge pumps or transformers - reduces size, cost, and EMI while supporting full –40°C to +125°C operation. |
| Motion Control | Wall-Transformer Regulation |
Use Scenario: Powering encoder interface circuitry and position feedback amplifiers in servo drives requiring clean, low-noise negative supply. IC Role / Device Role / Timing Role: Low-ripple inverting regulator with 90.6% peak efficiency and 6.2μA shutdown current - maintains regulation during microsecond-scale position updates. Use Value: Minimizes self-heating in enclosed enclosures; supports long-term reliability in fanless motion control cabinets. | Use Scenario: Replacing linear regulators in AC/DC wall adapters to improve efficiency and reduce thermal stress in compact consumer/industrial adapters. IC Role / Device Role / Timing Role: High-input-voltage inverting converter accepting up to 48V input (for –12V output), operating at 2.2MHz to shrink filter components. Use Value: Achieves >85% efficiency at 100mA load - cuts adapter surface temperature by >15°C versus 78L15-based solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17577ATC+ | Operates in continuous conduction mode (CCM); constant-frequency operation; higher light-load quiescent current (1.5–2mA vs. 6.2μA). | Better suited for noise-sensitive applications requiring fixed-frequency EMI profile; less efficient below ~200mA load. | Select MAX17577ATC+ only when CCM is required for spectral compliance or when output ripple must remain predictable across full load range. |
| LM5180QDGSRQ1 | Non-synchronous flyback controller; requires external MOSFET and transformer; no integrated negative-output capability - needs additional inverting stage. | Automotive AEC-Q100 qualified; supports 65V max input; lacks integrated compensation and system-ground-referenced I/O. | Choose LM5180QDGSRQ1 only for automotive-grade designs requiring ASIL-B compliance and transformer isolation - not a drop-in replacement. |
Compared with MAX17577ATC+, the MAX17578ATC+ trades constant-frequency operation for superior light-load efficiency and lower shutdown current, making it optimal for intermittently active industrial subsystems; versus LM5180QDGSRQ1, it offers simpler implementation, smaller footprint, and true integrated inverting functionality - but lacks automotive qualification.
Availability
MAX17578ATC+ is available at Aetrix Electronics and suitable for industrial control power supplies, gate-drive circuits, motion control systems, and wall-transformer regulation requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17578ATC+ 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision power, signal chain, and RF solutions.
The MAX17578ATC+ belongs to the Himalaya series of high-voltage DC-DC converters designed specifically for cooler, smaller, and simpler industrial power-supply solutions - emphasizing integration, efficiency, and rugged operation in harsh environments.
FAQ
What is the maximum input voltage supported by the MAX17578ATC+ for a –24V output?
The MAX17578ATC+ supports a maximum input voltage of 60V minus the absolute value of the output voltage. For a –24V output, the upper limit is 60V – 24V = 36V. This constraint ensures internal voltage ratings (e.g., LX-to-OUT, BST-to-LX) remain within safe operating limits. Exceeding 36V risks permanent damage even if other parameters appear nominal.
Does the MAX17578ATC+ require external compensation components?
No, the MAX17578ATC+ features internal loop compensation - no external Type-II or Type-III compensation network is needed. This simplifies design, reduces component count, and improves consistency across production units. All stability optimization is handled internally, verified across the full –0.9V to –36V output range and 400kHz–2.2MHz frequency band.
Can the MAX17578ATC+ start up into a precharged output voltage?
Yes, the MAX17578ATC+ supports monotonic startup into prebiased outputs. When the output is already at a negative voltage before enable, both high-side and low-side MOSFETs remain off until the SS pin voltage exceeds the FB pin voltage. This prevents reverse current flow and ensures controlled ramp-up - critical for hot-swap and redundant power architectures.
How does the RESET pin on the MAX17578ATC+ behave during thermal shutdown?
During thermal shutdown, the RESET pin on the MAX17578ATC+ is actively pulled low - identical to its behavior during output undervoltage or EN/UVLO deactivation. This provides unified fault signaling regardless of root cause. RESET remains low until junction temperature drops by 10°C (hysteresis), soft-start reinitiates, and FB rises above 95% of regulation for 1024 cycles.
Is the MAX17578ATC+ pin-compatible with the MAX17577ATC+?
Yes, the MAX17578ATC+ and MAX17577ATC+ share identical pinout, package (TDFN-EP), and footprint - enabling direct PCB-level substitution. However, their control modes differ: MAX17578ATC+ uses DCM for light-load efficiency, while MAX17577ATC+ uses CCM for constant frequency. No layout changes are required, but system-level validation of efficiency, ripple, and EMI is recommended after substitution.
MAX17578ATC+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Negative
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- -0.9V
- Voltage - Output (Max):
- -36V
- Current - Output:
- 1A
- Frequency - Switching:
- 400kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX17578ATC+ FAQ
1.How can I place an order for MAX17578ATC+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17578ATC+ 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 MAX17578ATC+ reliable?
The price and inventory of MAX17578ATC+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17578ATC+ is usually 5 days.
3.What payment methods are accepted for MAX17578ATC+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17578ATC+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17578ATC+?
MAX17578ATC+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17578ATC+ 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 MAX17578ATC+?
For technical support, including MAX17578ATC+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17578ATC+ requirements.
6.How does Aetrix verify that MAX17578ATC+ is sourced from the original manufacturer or authorized distributors?
All MAX17578ATC+ 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 MAX17578ATC+ meets industry standards.
7.What is the process for return or replacement of MAX17578ATC+?
All MAX17578ATC+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17578ATC+, 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 MAX17578ATC+ part is unused and in its original packaging.
Return procedure for MAX17578ATC+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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