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Analog Devices Inc./Maxim Integrated MAX17577ATC+
- Part No.:
- MAX17577ATC+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX17577ATC+.pdf
- Description:
- IC REG BUCK ADJ 1A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:755
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Product details
Overview
The MAX17577ATC+ from Analog Devices is a high-voltage, synchronous, inverting DC-DC converter IC with integrated MOSFETs, peak current-mode control, internal compensation, and system-ground-referenced I/O. It delivers up to 1A output current, supports adjustable output voltages from –0.9V to –36V, operates across a 4.5V to (60V – |VOUT|) input range, and achieves 90.6% peak efficiency in industrial power supplies.
For engineers reviewing the MAX17577ATC+ datasheet, MAX17577ATC+ pinout, MAX17577ATC+ application, or MAX17577ATC+ equivalent, key selection considerations include its CCM-only operation, –36V negative output capability, 600kHz default switching frequency, ±1.3% feedback regulation accuracy over –40°C to +125°C, and built-in hiccup-mode overload protection for robust industrial deployment.
Technical Context
The MAX17577ATC+ implements a peak current-mode control architecture with fixed-frequency continuous conduction mode (CCM) operation across all load conditions, ensuring stable switching frequency and predictable EMI behavior. Its internal error amplifier compares FB voltage against a 0.9V reference, modulating high-side MOSFET on-time to regulate output voltage.
It integrates dual nMOSFETs (330mΩ high-side, 163mΩ low-side), a 5V internal LDO (VCC) referenced to SOUT, and system-ground-referenced EN/UVLO, RESET, and RT/SYNC pins-eliminating external level shifters. The device features monotonic startup into prebiased outputs and programmable soft-start via an external capacitor on SS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Polarity | Inverting: generates regulated negative output voltage from positive input |
| Output Voltage Range | –0.9V to –36V; set via resistor divider on FB pin with ±1.3% regulation accuracy |
| Input Voltage Range | 4.5V to (60V – |VOUT|); e.g., max 48V input for –12V output |
| Max Output Current | 1A continuous; limited by internal 2.4A peak current threshold and thermal design |
| Switching Frequency | Default 600kHz; adjustable 400kHz–2.2MHz via RT/SYNC resistor or external clock sync |
| Efficiency | 90.6% peak at mid-load; enabled by synchronous rectification and low RDS-ON MOSFETs |
| Shutdown Current | 6.2μA; enables ultra-low-power standby in battery-backed or energy-sensitive systems |
| Operating Temp | –40°C to +125°C ambient; junction rated to +150°C with thermal shutdown at +165°C |
Pinout & Package
MAX17577ATC+ is housed in a compact 12-pin TDFN-EP package (3mm × 3mm, TD1233+1C), with exposed pad (EP) thermally connected to SOUT for enhanced heat dissipation. Pin functions are validated per Analog Devices' official pin description and functional diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power input | Accepts 4.5V–(60V–|VOUT|); requires ≥2.2μF X7R ceramic decoupling to GND |
| EN/UVLO | Enable & input UVLO | System-ground-referenced; rising threshold 1.229V, falling 1.09V; no level shifter needed |
| RESET | Open-drain status output | Pulls low when VOUT < 92% of set value; deasserts after 1024 cycles above 95% regulation |
| SS | Soft-start timing | Capacitor-to-SOUT sets ramp time; ensures monotonic startup into prebiased outputs |
| VCC | Internal 5V LDO output | Supplies internal circuitry; bypassed with 2.2μF ceramic to SOUT; not for external loading |
| RT/SYNC | Freq programming / sync input | Resistor-to-SOUT sets fSW (400kHz–2.2MHz); also accepts AC-coupled external clock (1.1–1.4× fSW) |
| FB | Feedback sensing | Monitors output via resistor divider; 0.9V internal reference; ±1.3% accuracy over full temp range |
| SOUT | Reference node | Internal control ground; Kelvin connection point for output capacitor; ties to EP |
| GND | System ground | Power ground return; single-point star connection recommended for noise control |
| BST | Bootstrap supply | Connects 0.1μF ceramic to LX; powers high-side gate driver |
| LX | Switching node | Drives external inductor; high-impedance during shutdown; requires low-inductance layout |
| OUT | Negative output terminal | Low-side MOSFET source node; connects directly to output capacitor negative terminal |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous inverting topology | Enables efficient negative rail generation without external diode; reduces BOM count and thermal stress |
| Internal loop compensation | Eliminates need for external compensation network; simplifies design and improves stability margin |
| System-ground-referenced I/O | EN/UVLO, RESET, RT/SYNC operate relative to GND-not SOUT-removing level-shifter circuitry |
| Hiccup-mode overload protection | Enters 32,768-cycle shutdown on overcurrent or VFB < 0.58V; limits power dissipation during short-circuit |
| Prebiased output startup | Prevents sinking current from existing output voltage; ensures safe start into live-rail systems |
| CISPR 32 Class B compliance | Meets conducted/radiated emissions requirements without added filtering-reduces EMC debug time |
Applications
| Industrial Control Power Supply | Gate-Drive Circuits |
|---|---|
Use Scenario: Providing isolated –15V bias for IGBT or SiC MOSFET gate drivers in motor drives and inverters. IC Role / Device Role / Timing Role: Inverting DC-DC converter generating stable negative rail from 24V or 48V system bus. Use Value: Enables fast, symmetric turn-on/turn-off of power switches using integrated MOSFETs and 600kHz switching for compact magnetics. | Use Scenario: Generating –5V or –12V for op-amp biasing, analog sensor interfaces, or precision ADC references in PLC modules. IC Role / Device Role / Timing Role: Negative-output point-of-load regulator with ±1.3% regulation accuracy over –40°C to +125°C. Use Value: Maintains signal integrity in noisy industrial environments via monotonic startup, hiccup protection, and CISPR 32 compliance. |
| Motion Control | Wall-Transformer Regulation |
Use Scenario: Supplying –24V for servo amplifier feedback circuitry and position encoder interfaces in CNC systems. IC Role / Device Role / Timing Role: High-voltage inverting converter operating from 48V bus with 1A capability and wide input range. Use Value: Delivers clean, regulated negative rail despite input ripple from unregulated DC bus; supports long-term reliability at +125°C ambient. | Use Scenario: Replacing linear regulators in wall-adaptor-powered equipment requiring –3.3V or –5V auxiliary rails. IC Role / Device Role / Timing Role: Efficient synchronous inverter replacing lossy 78Lxx-style solutions in space-constrained enclosures. Use Value: Reduces thermal load by >70% vs. linear regulator; enables smaller heatsinks and higher power density in sealed housings. |
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 |
|---|---|---|---|
| MAX17578ATC+ | Discontinuous conduction mode (DCM) at light loads; lower no-load current (1.5mA vs. 6.3mA); same pinout and package | Better light-load efficiency; less suitable for constant-frequency EMI-sensitive applications | Select MAX17578ATC+ when optimizing for standby power in battery-backed or intermittent-duty systems |
| LM5160QPWPRQ1 | Non-synchronous buck-boost; requires external Schottky diode; wider input (3V–65V); no integrated negative-output capability | Requires external inverting stage for negative rails; lacks internal compensation and ground-referenced I/O | Choose LM5160QPWPRQ1 only if designing custom inverting topology with discrete FETs and needing automotive AEC-Q100 qualification |
Compared with MAX17577ATC+, the MAX17578ATC+ offers superior light-load efficiency but sacrifices fixed-frequency operation, while the LM5160QPWPRQ1 demands additional components and layout effort to achieve comparable negative output functionality-making MAX17577ATC+ optimal for compact, high-reliability industrial inverting supplies.
Availability
MAX17577ATC+ 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 MAX17577ATC+ 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 MAX17577ATC+ belongs to the Himalaya series of high-voltage DC-DC converters designed specifically for cooler, smaller, and simpler industrial power-supply solutions-emphasizing integration, ruggedness, and ease of use in harsh environments.
FAQ
What is the maximum negative output voltage supported by the MAX17577ATC+?
The MAX17577ATC+ supports an adjustable output voltage range from –0.9V to –36V. This is achieved using a resistor divider on the FB pin with a 0.9V internal reference. The upper limit is constrained by the input voltage relationship: VIN ≤ 60V – |VOUT|, so a –36V output requires VIN ≤ 24V. The ±1.3% regulation accuracy holds across the full –40°C to +125°C temperature range.
Does the MAX17577ATC+ require external compensation components?
No, the MAX17577ATC+ features internal loop compensation, eliminating the need for external compensation networks such as type-II or type-III compensators. This simplifies PCB layout, reduces BOM count, and improves design predictability. Stability is ensured across the full output voltage and load range without user-adjustable compensation components.
How does the MAX17577ATC+ handle startup into a prebiased output?
The MAX17577ATC+ implements monotonic startup into prebiased outputs: both high-side and low-side MOSFETs remain off until the SS pin voltage exceeds the FB pin voltage. Only then does soft-start commence, allowing VFB and VOUT to ramp up smoothly. This prevents reverse current flow and ensures safe operation in systems where the output rail is already energized before the converter powers up.
What protection features are integrated into the MAX17577ATC+?
The MAX17577ATC+ integrates hiccup-mode overload protection, thermal shutdown (+165°C trip, +155°C hysteresis), adjustable EN/UVLO, programmable soft-start, built-in output monitoring with open-drain RESET, and overtemperature protection. It also features cycle-by-cycle peak current limiting (2.4A) and runaway current limiting (2.65A) to safeguard against short-circuit and overload conditions without external circuitry.
Can the MAX17577ATC+ synchronize to an external clock, and what are the requirements?
Yes, the MAX17577ATC+ supports external clock synchronization via the RT/SYNC pin. The external clock must fall within 1.1× to 1.4× the internally programmed switching frequency (set by RRT/SYNC). Pulse width must exceed 100ns, and duty cycle must be between 10% and 90%. The clock signal is AC-coupled, and amplitude depends on duty cycle-e.g., >1.3V for 20–80% DSYNC. An external resistor must remain connected during sync operation.
MAX17577ATC+ 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)
MAX17577ATC+ FAQ
1.How can I place an order for MAX17577ATC+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17577ATC+ 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 MAX17577ATC+ reliable?
The price and inventory of MAX17577ATC+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17577ATC+ is usually 5 days.
3.What payment methods are accepted for MAX17577ATC+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17577ATC+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17577ATC+?
MAX17577ATC+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17577ATC+ 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 MAX17577ATC+?
For technical support, including MAX17577ATC+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17577ATC+ requirements.
6.How does Aetrix verify that MAX17577ATC+ is sourced from the original manufacturer or authorized distributors?
All MAX17577ATC+ 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 MAX17577ATC+ meets industry standards.
7.What is the process for return or replacement of MAX17577ATC+?
All MAX17577ATC+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17577ATC+, 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 MAX17577ATC+ part is unused and in its original packaging.
Return procedure for MAX17577ATC+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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