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Analog Devices Inc./Maxim Integrated MAX17502GATB+
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- Part No.:
- MAX17502GATB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17502GATB+.pdf
- Description:
- IC REG BUCK ADJ 1A 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,331
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Product details
Overview
MAX17502GATB+ from Maxim Integrated is a 60V input, 1A synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS power switches, delivering adjustable output from 0.9V to 92%VIN with ±1.7% regulation accuracy over –40°C to +125°C ambient. It operates at 600kHz fixed frequency, achieves >90% peak efficiency, and supports industrial applications requiring robust overcurrent and thermal protection.
For engineers reviewing the MAX17502GATB+ datasheet, MAX17502GATB+ pinout, MAX17502GATB+ application, or MAX17502GATB+ equivalent, key selection criteria include its 0.9V–92%VIN adjustable output, 600kHz switching frequency, hiccup-mode current limiting, open-drain RESET output with 92.5%/95.5% VOUT thresholds, and TDFN-10 (3mm × 2mm) package with exposed pad for thermal management.
Technical Context
The MAX17502GATB+ implements peak-current-mode control with internal transconductance error amplifier (GM = 590µS typ), slope compensation, and fixed-frequency PWM. Its control loop supports stable operation with all-ceramic output capacitors and requires external RC compensation on the COMP pin for adjustable-output variants.
It integrates a 5V LDO (VCC) capable of sourcing up to 40mA, resistor-programmable EN/UVLO threshold (1.218V typ rising), adjustable soft-start via SS pin (5µA charging current), and built-in hiccup-mode protection triggered by either runaway current limit (1.7A typ) or VOUT falling below 71.14% of nominal after soft-start completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - enables direct connection to unregulated industrial rails, battery stacks, or PoE-powered systems without pre-regulation. |
| Output Voltage Range | 0.9V to 92%VIN - supports wide-range point-of-load conversion including sub-1V core supplies and high-VIN-to-VOUT ratios. |
| Max Output Current | 1A - sufficient for powering microcontrollers, FPGAs, sensors, and communication ICs in space-constrained designs. |
| Switching Frequency | 600kHz (typ) - balances efficiency, inductor size, and EMI performance; allows use of compact 1–2.2µH shielded inductors. |
| Regulation Accuracy | ±1.7% over –40°C to +125°C - ensures stable system operation across extended industrial temperature range without calibration. |
| Peak Efficiency | >90% - minimizes thermal load and extends battery life in portable equipment; achieved via integrated 0.85Ω pMOS / 0.35Ω nMOS switches. |
| RESET Thresholds | VOUT-OKR = 95.5%, VOUT-OKF = 92.5% - provides precise power-good signaling for sequenced startup and fault detection in multi-rail systems. |
Pinout & Package
MAX17502GATB+ is housed in a 10-pin, 3mm × 2mm TDFN package with exposed thermal pad (EP) connected to GND. The compact footprint supports ultra-dense PCB layouts while enabling efficient heat dissipation through the EP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | Low-impedance return path for high-current LX switching node; must be connected directly to power ground plane and tied to GND at VCC bypass capacitor. |
| 2 VIN | Main Input Supply | Accepts 4.5V–60V input; requires ≥2.2µF X7R ceramic input capacitor close to pin for ripple suppression and stability. |
| 3 EN/UVLO | Enable / Input UVLO Control | Resistor-divider programmable turn-on threshold (1.218V typ); pull high to VIN for always-on operation. |
| 4 VCC | Internal 5V LDO Output | Powers internal circuitry and low-side gate driver; requires 1µF ceramic bypass to GND; shuts down if VCC falls below 3.7V. |
| 5 FB/VO | Feedback Input | Connects to center of resistive divider (R4/R5) for adjustable output; sets regulation point at 0.9V reference; bias current <100nA ensures minimal divider loading. |
| 6 SS | Soft-Start Timing | Capacitor-to-GND sets ramp time; 5µA internal current source enables predictable inrush control during power-up or prebiased start. |
| 7 N.C./COMP | Compensation Node | For MAX17502G/H: connect RC network (RZ/CZ) for loop stability; for fixed-output versions: no-connect and must remain floating. |
| 8 RESET | Open-Drain Power-Good | Active-low signal asserted when VOUT drops below 92.5%; releases 1024 cycles after VOUT rises above 95.5%; requires external pullup. |
| 9 GND | Analog Ground | Reference for FB, SS, COMP, RESET; separate from PGND but tied together at single-point near VCC capacitor. |
| 10 LX | Switching Node | Connects to inductor switch node; high-impedance during shutdown; handles ±1.6A RMS current; requires low-inductance layout to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | On-chip 0.85Ω pMOS high-side and 0.35Ω nMOS low-side switches eliminate external Schottky diode and reduce BOM count and board area. |
| Hiccup-Mode Overcurrent Protection | Triggers after one runaway current event (1.7A typ) or sustained VOUT undervoltage (71.14% of setpoint), then suspends switching for 32,768 cycles before retry-minimizing fault power dissipation. |
| Prebiased Power-Up Support | Both switches remain off until first PWM pulse, preventing reverse current flow into precharged output rails-critical for hot-swap and redundant supply systems. |
| Thermal Shutdown with Hysteresis | Shuts down at 165°C junction temperature and restarts only after cooling by 10°C, preventing thermal oscillation and ensuring safe recovery under overload. |
| Industrial Temperature Rating | Specified for –40°C to +125°C ambient operation with junction limit of +150°C-enables deployment in harsh environments like factory automation and outdoor telecom. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Powering PLC I/O modules, analog sensor interfaces, and isolated RS-485 transceivers in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 24V/48V field bus to 3.3V/5V logic rails with hiccup-mode fault containment. Use Value: ±1.7% output accuracy ensures ADC reference stability; 600kHz switching enables small 1.5µH inductors and reduces EMI filtering cost. | Use Scenario: Supplying HVAC zone controllers, damper actuators, and environmental sensor nodes deployed in ceiling plenums or outdoor enclosures. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC stage converting 24V AC-DC output to regulated 3.3V for MCU and wireless SoC operation. Use Value: TDFN-10 package with exposed pad maintains <125°C junction under full load at 70°C ambient; EN/UVLO prevents brownout resets during line sags. |
| Base Station Power Management | Battery-Powered Test Equipment |
Use Scenario: Generating auxiliary 3.3V/5V rails for fronthaul interface ICs, clock buffers, and FPGA configuration in remote radio units (RRUs). IC Role / Device Role / Timing Role: High-input-voltage buck converter accepting 48V PoE++ or telecom -48V (with polarity inversion) to generate clean logic supplies. Use Value: 60V absolute max rating accommodates 48V transients; RESET output synchronizes FPGA configuration with stable VOUT. | Use Scenario: Powering handheld oscilloscopes, multimeters, and portable spectrum analyzers operating from 2S–3S Li-ion packs (7.2V–12.6V). IC Role / Device Role / Timing Role: Adjustable-output buck regulator scaling battery voltage to precise 1.8V/3.3V rails for mixed-signal data acquisition circuits. Use Value: 0.9V–92%VIN range supports deep discharge down to 6V; shutdown current of 0.9µA extends shelf life during storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5V–65V input, 1A, 600kHz, AEC-Q100 qualified; requires external MOSFETs; no integrated COMP compensation network. | Automotive-grade; lacks prebiased start and hiccup-mode reset behavior; higher external component count. | Select LM5164QDDARQ1 only when AEC-Q100 qualification is mandatory and layout space permits discrete FETs and compensation design. |
| TPS54160DGQR | 3.5V–60V input, 1.5A, 100kHz–2.5MHz adjustable frequency; integrated FETs; no RESET output; ±2% output accuracy. | Lower switching frequency increases inductor size; no power-good signaling; wider accuracy tolerance impacts precision analog rails. | Choose TPS54160DGQR when lower EMI emissions are prioritized over size and when system-level monitoring replaces dedicated RESET functionality. |
Compared with LM5164QDDARQ1 and TPS54160DGQR, MAX17502GATB+ delivers superior integration (internal COMP network, RESET, hiccup mode), tighter regulation (±1.7%), and smaller solution size due to TDFN-10 packaging and all-ceramic capacitor support-making it optimal for space-constrained industrial and test equipment designs.
Availability
MAX17502GATB+ is available at Aetrix Electronics and suitable for industrial process control, HVAC systems, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX17502GATB+ 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, designs high-performance analog and mixed-signal ICs for industrial, automotive, communications, and computing markets.
The MAX17502 product line targets compact, high-reliability DC-DC conversion in harsh environments-emphasizing wide input range, integrated protection, and minimal external components for rapid point-of-load implementation.
FAQ
What is the recommended input capacitor for MAX17502GATB+?
A minimum 2.2µF X7R ceramic capacitor is required at the VIN pin, placed as close as possible to the device. For improved ripple suppression and damping-especially with long input traces-an electrolytic capacitor (e.g., 10–47µF) should be added in parallel. This configuration meets the discontinuous input current demands of the 600kHz switching frequency and prevents instability caused by trace inductance.
Does MAX17502GATB+ support prebiased output startup?
Yes, MAX17502GATB+ supports prebiased output startup. When enabled into a precharged rail, both high-side and low-side MOSFETs remain off until the first PWM command initiates switching-preventing reverse current flow and ensuring controlled ramp-up. This behavior is confirmed in the datasheet's "Prebiased Output" section and validated in typical operating waveforms (Figure MAX17502 toc17–toc18).
What is the function of the N.C./COMP pin on MAX17502GATB+?
On MAX17502GATB+, the N.C./COMP pin serves as the compensation node for the error amplifier. Unlike fixed-output variants, this pin must be connected to an external RC network (RZ and CZ) to stabilize the control loop for adjustable output configurations. The values are calculated based on switching frequency and output inductance per the datasheet's "External Loop Compensation" section-leaving it unconnected will cause regulation instability.
How does the RESET output of MAX17502GATB+ behave during thermal shutdown?
During thermal shutdown, the RESET output of MAX17502GATB+ is actively driven low, providing a reliable fault indicator to the host system. RESET remains low until the junction temperature cools by 10°C and the device successfully reinitiates soft-start. This behavior is explicitly documented in the "RESET Output" section and ensures system-level fault detection even when regulation is lost due to overheating.
Can MAX17502GATB+ operate with an input voltage below 4.5V?
No, MAX17502GATB+ cannot operate with an input voltage below 4.5V. The absolute minimum operating input voltage is specified as 4.5V in the Electrical Characteristics table, and attempting operation below this threshold results in undefined behavior, failure to regulate, or automatic shutdown. The EN/UVLO pin can be configured to enable only above a higher threshold (e.g., 12V), but the device will not function if VIN itself drops below 4.5V-even if EN is asserted.
MAX17502GATB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Strip
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- 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):
- 55.2V
- Current - Output:
- 1A
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN (3x2)
MAX17502GATB+ FAQ
1.How can I place an order for MAX17502GATB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17502GATB+ 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 MAX17502GATB+ reliable?
The price and inventory of MAX17502GATB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17502GATB+ is usually 5 days.
3.What payment methods are accepted for MAX17502GATB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17502GATB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17502GATB+?
MAX17502GATB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17502GATB+ 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 MAX17502GATB+?
For technical support, including MAX17502GATB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17502GATB+ requirements.
6.How does Aetrix verify that MAX17502GATB+ is sourced from the original manufacturer or authorized distributors?
All MAX17502GATB+ 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 MAX17502GATB+ meets industry standards.
7.What is the process for return or replacement of MAX17502GATB+?
All MAX17502GATB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17502GATB+, 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 MAX17502GATB+ part is unused and in its original packaging.
Return procedure for MAX17502GATB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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