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Analog Devices Inc./Maxim Integrated MAX17579ATC+
- Part No.:
- MAX17579ATC+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17579ATC+.pdf
- Description:
- IC REG BUCK ADJ 300MA 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:758
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Product details
Overview
The MAX17579ATC+ from Analog Devices is a high-voltage, synchronous, inverting DC-DC converter IC with integrated high-side and low-side nMOSFETs, peak current-mode control, internal compensation, and system-ground-referenced EN/UVLO, RESET, and RT/SYNC pins. It delivers up to 300mA output current, supports adjustable output voltages from –0.9V to –36V, operates from 4.5V to (60V – |VOUT|) input, and achieves 88.4% peak efficiency in industrial power supplies.
For engineers reviewing the MAX17579ATC+ datasheet, MAX17579ATC+ pinout, MAX17579ATC+ application, or MAX17579ATC+ equivalent, this page provides verified technical context, confirmed pin functions, real-world operating constraints (e.g., ±1.3% FB regulation accuracy over –40°C to +125°C), validated CCM operation mode, and documented thermal shutdown at 165°C - all essential for robust negative-rail point-of-load design.
Technical Context
The MAX17579ATC+ implements a peak current-mode control architecture with fixed-frequency continuous conduction mode (CCM) operation across all load conditions, ensuring stable switching frequency without light-load mode transitions. Its internal error amplifier compares FB voltage against a 0.9V reference, directly setting peak inductor current to regulate output voltage.
It integrates an internal 5V LDO (VCC) referenced to SOUT, with 4.75V–5.25V output and 25–100mA current limit, powering internal circuitry without external bias. All I/O pins - EN/UVLO, RESET, and RT/SYNC - are referenced to system ground (GND), eliminating level-shifters in industrial control interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Polarity | Inverting: generates regulated negative output voltage (–0.9V to –36V) from positive input |
| Input Voltage Range | 4.5V to (60V – |VOUT|): enables wide-input operation while respecting absolute max ratings (e.g., –15V output allows up to 45V input) |
| Max Output Current | 300mA: sustained load capability with integrated MOSFETs (RDS-ONH = 0.975Ω typ, RDS-ONL = 0.443Ω typ) |
| Switching Frequency | 400kHz–2.2MHz adjustable via RT/SYNC resistor or external clock sync: supports compact magnetics and EMI optimization |
| FB Regulation Accuracy | ±1.3% over –40°C to +125°C: ensures stable output under full industrial temperature range without calibration |
| Shutdown Current | 6.2μA: ultra-low quiescent draw during disable, critical for battery-backed or always-on systems |
| Thermal Shutdown | 165°C junction threshold with 10°C hysteresis: protects against sustained overload or poor PCB thermal design |
Pinout & Package
Package: 12-pin TDFN-EP (3mm × 3mm), exposed pad (EP) connected to SOUT for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power supply input | Accepts 4.5V–(60V–|VOUT|); requires ≥1μF X7R ceramic decoupling close to pin |
| EN/UVLO | Enable/undervoltage lockout input | GND-referenced; rising threshold 1.229V (typ), enables startup only above configured VIN |
| RESET | Open-drain status output | Pulled low when VOUT < 92% of setpoint; requires external 10kΩ pullup to monitor regulation |
| SS | Soft-start timing input | Capacitor to SOUT sets monotonic startup; prevents inrush into prebiased outputs |
| VCC | Internal 5V LDO output | Supplies internal logic; bypassed with 2.2μF ceramic to SOUT; not for external loading |
| RT/SYNC | Frequency programming / sync input | GND-referenced; resistor sets fSW (400kHz–2.2MHz) or accepts AC-coupled external clock (1.1–1.4× fSW) |
| FB | Feedback input | Monitors output via resistor divider; 0.9V regulation reference with ±1.3% accuracy over temp |
| SOUT | Reference node for control circuitry | Kelvin connection point for output capacitor; serves as return for VCC, FB, SS, and EP |
| GND | System ground | Power ground plane connection point; single-point grounding recommended for noise control |
| BST | Bootstrap capacitor terminal | Connects 0.1μF ceramic to LX; enables high-side gate drive in inverting buck-boost topology |
| LX | Switching node | High-impedance when disabled; connects to inductor; handles peak currents up to 0.803A |
| OUT | Negative output node | Low-side MOSFET source terminal; connects directly to output capacitor and system ground |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous MOSFETs | Eliminates external FETs and drivers; reduces BOM count and layout complexity in negative-rail converters |
| System-ground-referenced I/O | EN/UVLO, RESET, and RT/SYNC tied to GND - no level shifters needed for PLC or motion controller interfacing |
| Internal loop compensation | Removes external compensation network; simplifies design and improves stability across input/output ranges |
| Hiccup-mode overload protection | Shuts down for 32,768 cycles at half frequency upon short-circuit or runaway current (>0.893A), limiting power dissipation |
| Prebiased output startup | Prevents sinking current from existing negative rail during power-up; ensures monotonic VOUT rise |
Applications
| Industrial Control Power Supply | Gate-Drive Circuits |
|---|---|
Use Scenario: Providing isolated –15V rail for analog sensor front-ends and ADC reference buffers in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Inverting DC-DC converter generating stable negative bias from 24V system bus. Use Value: ±1.3% FB accuracy and –40°C to +125°C operation ensure consistent sensor signal conditioning across factory floor temperatures. | Use Scenario: Generating –5V gate drive for high-side IGBTs in servo motor inverters. IC Role / Device Role / Timing Role: Compact, high-efficiency negative rail generator synchronized to system clock via RT/SYNC pin. Use Value: 400kHz–2.2MHz adjustable frequency enables EMI compliance in motion control cabinets with tight spectral masks. |
| Motion Control | Wall-Transformer Regulation |
Use Scenario: Supplying –12V to op-amps and comparators in closed-loop position feedback circuits. IC Role / Device Role / Timing Role: CCM-mode inverting regulator delivering 300mA with constant frequency for predictable EMI behavior. Use Value: 88.4% peak efficiency and 6.2μA shutdown current extend uptime in fanless embedded motion controllers. | Use Scenario: Replacing linear regulators in wall-adapted equipment requiring –3.3V or –5V for USB-C PD auxiliary rails. IC Role / Device Role / Timing Role: High-input-voltage inverting converter accepting up to 45V (for –15V output) from unregulated transformer secondaries. Use Value: Wide 4.5V–(60V–|VOUT|) input range accommodates varying transformer output under load and line fluctuations. |
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 |
|---|---|---|---|
| MAX17580ATC+ | Discontinuous conduction mode (DCM) at light loads; lower no-load current (1.5mA vs. 3.6mA); identical pinout and package | Better light-load efficiency in intermittent-duty systems (e.g., sensor polling), but variable frequency may complicate EMI filtering | Select MAX17580ATC+ only if light-load efficiency >85% at <10mA is required; otherwise MAX17579ATC+ preferred for fixed-frequency stability |
| LT8330EMSE#TRPBF | Fixed 2MHz switching; no internal compensation; requires external loop components; 40V max input (vs. 60V–|VOUT|) | Smaller solution size possible, but lacks system-ground-referenced EN/UVLO and RESET, increasing interface complexity | Choose LT8330 only when board space is constrained and design team has loop-compensation expertise; MAX17579ATC+ offers faster time-to-market with integrated features |
Compared with MAX17580ATC+, the MAX17579ATC+ guarantees constant-frequency CCM operation - critical for EMI-sensitive motion control. Against LT8330EMSE#TRPBF, it trades minor size penalty for full integration, ground-referenced I/O, and simplified qualification in industrial environments.
Availability
MAX17579ATC+ is available at Aetrix Electronics and suitable for industrial control power supply, gate-drive circuits, and motion control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17579ATC+ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX17579ATC+ belongs to the Himalaya series of high-voltage DC-DC converters, designed specifically for compact, efficient, and thermally robust negative-rail power generation in harsh industrial environments.
FAQ
What is the maximum input voltage supported by the MAX17579ATC+ for a –24V output?
The MAX17579ATC+ supports an input voltage up to (60V – |VOUT|). For a –24V output, |VOUT| = 24V, so the maximum input is 60V – 24V = 36V. This limit ensures internal voltage ratings (e.g., IN-to-OUT stress) remain within safe operating area. Exceeding 36V risks damage even if the nominal VIN spec appears higher.
Does the MAX17579ATC+ require external compensation components?
No, the MAX17579ATC+ includes internal loop compensation. Its control architecture eliminates the need for external Type-II or Type-III compensation networks, reducing component count and layout sensitivity. This is confirmed in the "Benefits and Features" section and functional block diagram of the official datasheet.
Can the MAX17579ATC+ start up into a prebiased output voltage?
Yes, the MAX17579ATC+ supports monotonic startup into a prebiased output. During initial power-up, both high-side and low-side MOSFETs remain off until the SS pin voltage exceeds the FB pin voltage, preventing reverse current flow and ensuring controlled ramp-up of VOUT. This behavior is explicitly documented in the "Prebiased Output" section.
What is the function of the SOUT pin on the MAX17579ATC+?
The SOUT pin on the MAX17579ATC+ serves as the reference node for internal control circuitry - including the VCC LDO, FB comparator, SS timer, and RESET logic. It must be connected to the output capacitor's negative terminal via a Kelvin sense path and tied to the exposed pad (EP). All internal references are referenced to SOUT, not GND.
How does the RESET pin on the MAX17579ATC+ behave during thermal shutdown?
During thermal shutdown, the RESET pin on the MAX17579ATC+ is actively pulled low, indicating fault condition. This occurs independently of FB voltage - RESET asserts low not only when VOUT drops below 92% of regulation but also during thermal events or when EN/UVLO falls below its falling threshold (VENF = 1.09V). The pin remains low until junction temperature cools by 10°C and soft-start completes successfully.
MAX17579ATC+ 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):
- 60V
- Voltage - Output (Min/Fixed):
- -0.9V
- Voltage - Output (Max):
- -36V
- Current - Output:
- 300mA
- 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)
MAX17579ATC+ FAQ
1.How can I place an order for MAX17579ATC+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17579ATC+ 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 MAX17579ATC+ reliable?
The price and inventory of MAX17579ATC+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17579ATC+ is usually 5 days.
3.What payment methods are accepted for MAX17579ATC+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17579ATC+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17579ATC+?
MAX17579ATC+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17579ATC+ 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 MAX17579ATC+?
For technical support, including MAX17579ATC+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17579ATC+ requirements.
6.How does Aetrix verify that MAX17579ATC+ is sourced from the original manufacturer or authorized distributors?
All MAX17579ATC+ 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 MAX17579ATC+ meets industry standards.
7.What is the process for return or replacement of MAX17579ATC+?
All MAX17579ATC+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17579ATC+, 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 MAX17579ATC+ part is unused and in its original packaging.
Return procedure for MAX17579ATC+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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