My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX17501AATB+T
.jpg)
- Part No.:
- MAX17501AATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17501AATB+T.pdf
- Description:
- IC REG BUCK 3.3V 500MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:12,857
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX17501AATB+T from Maxim Integrated is a 60V input, 500mA synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS FETs, fixed 3.3V output, ±1.7% regulation accuracy over –40°C to +125°C, and 600kHz switching frequency - deployed in industrial power rails, telecom point-of-load, and battery-powered equipment requiring ultra-small footprint and high light-load efficiency.
For engineers reviewing the MAX17501AATB+T datasheet, MAX17501AATB+T pinout, MAX17501AATB+T application, or MAX17501AATB+T equivalent, key selection criteria include its PFM light-load operation mode, resistor-programmable EN/UVLO threshold (1.218V typ), open-drain RESET with 95.5% rising threshold, 10-pin 3mm × 2mm TDFN package, and hiccup-mode overcurrent protection triggered at 780mA runaway current limit.
Technical Context
The MAX17501AATB+T implements peak-current-mode control with internal transconductance error amplifier (GM = 590µS typ), slope compensation, and PWM comparator driving integrated pMOS/nMOS switches. It operates in PFM mode at light loads to minimize quiescent current (0.9µA typ shutdown), while maintaining fixed 600kHz switching under forced-PWM conditions for noise-sensitive systems.
Its architecture includes an internal 5V LDO (VCC) with 40mA sourcing capability, programmable soft-start via external capacitor on SS pin, and dual-level overcurrent protection: cycle-by-cycle peak limit (760mA typ) and runaway limit (780mA typ) that initiates hiccup mode after one violation. Output voltage monitoring is performed via FB/VO pin with ±1.7% accuracy across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial and battery-derived supplies including 24V, 36V, and 48V bus systems without external pre-regulation. |
| Output Voltage | Fixed 3.3V - factory-trimmed; regulated to ±1.7% over –40°C to +125°C ambient, enabling direct powering of MCU I/O, sensors, and logic. |
| Max Output Current | 500mA - sustained delivery with integrated 0.85Ω high-side pMOS and 0.35Ω low-side nMOS ensures >90% peak efficiency at full load. |
| Switching Frequency | 600kHz (typ) - enables compact magnetics and ceramic output capacitors; minimum on-time of 120ns supports high VIN/VOUT ratios. |
| EN/UVLO Threshold | 1.218V (typ, rising) - resistor-divider programmable turn-on point for controlled power sequencing in multi-rail systems. |
| RESET Function | Open-drain output asserting low when VOUT falls below 92.5% of nominal; rises after 1024 cycles once VOUT exceeds 95.5% - provides reliable power-good signaling. |
| Thermal Protection | Hiccup-mode shutdown at 165°C junction temperature with 10°C hysteresis - prevents thermal runaway during overload or poor PCB heatsinking. |
Pinout & Package
MAX17501AATB+T is housed in a 10-pin, 3mm × 2mm TDFN package with exposed pad (EP) connected to GND for thermal performance. Pin 1 is PGND; pin 10 is LX; EP must be soldered to a dedicated GND copper plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | High-current return path for LX switch node; must connect externally to power ground plane and tie to GND at VCC bypass capacitor. |
| 2 VIN | Main Input Supply | Accepts 4.5V–60V; requires ≥1µF ceramic input capacitance; absolute max rating is +70V. |
| 3 EN/UVLO | Enable / Input Undervoltage Lockout | Resistor-divider programmable startup threshold; pulls up to VIN for always-on operation; leakage <200nA at 60V. |
| 4 VCC | Internal 5V LDO Output | Bypass with 1µF ceramic to GND; sources up to 40mA; UVLO disables LDO if VCC drops below 3.7V. |
| 5 FB/VO | Feedback Input | Direct connection to 3.3V output; monitors regulation with 0.9V reference; bias current 6.8–17µA depending on version. |
| 6 SS | Soft-Start Control | Capacitor-to-GND sets ramp time; charging current 5µA (typ); supports prebiased start-up without sinking output current. |
| 7 N.C./COMP | No Connect (Fixed-Output Version) | Not connected internally for MAX17501A; must remain unconnected - not used for loop compensation. |
| 8 RESET | Open-Drain Power-Good Signal | Sinks 2mA when low; requires external pull-up; asserts low on undervoltage (92.5%), thermal shutdown, or hiccup fault. |
| 9 GND | Analog Ground | Reference for FB, COMP, SS, RESET; separate from PGND but tied together at VCC bypass capacitor. |
| 10 LX | Switching Node | Connects to inductor; high-impedance in shutdown; voltage swing from PGND to VIN+0.3V (abs max). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated High/Low-Side MOSFETs | 0.85Ω pMOS + 0.35Ω nMOS eliminates external switches and Schottky diode, reducing BOM count and layout area. |
| PFM Light-Load Efficiency Mode | Reduces no-load switching current to ~80µA at +25°C, extending battery life in standby applications. |
| Programmable EN/UVLO Threshold | Resistor-divider configuration allows precise power sequencing alignment with upstream supplies or system reset timing. |
| Hiccup-Mode Overcurrent Protection | 32,768-cycle timeout limits average power dissipation during short-circuit, enabling safe operation without thermal derating. |
| Prebiased Start-Up Capability | Prevents reverse current flow into powered outputs - critical for hot-swap and redundant supply architectures. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
|
Use Scenario: Powering PLC I/O modules, sensor transmitters, and fieldbus interface ICs in 24V/36V distributed control cabinets. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator delivering stable rail for microcontrollers and analog front-ends. Use Value: ±1.7% output accuracy over –40°C to +125°C ensures consistent ADC reference and digital logic timing across ambient extremes. |
Use Scenario: Supplying HVAC controllers, damper actuators, and environmental sensors operating from 48V building power buses. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter replacing discrete solutions in space-constrained wall-mounted units. Use Value: 600kHz switching enables use of ≤2.2µH inductors and all-ceramic output caps, eliminating electrolytics for 15-year lifetime. |
| Base Station & Telecom | Battery-Powered Equipment |
|
Use Scenario: Generating 3.3V for small-cell radio control boards, remote PHY interfaces, and VoIP endpoint processors. IC Role / Device Role / Timing Role: Secondary regulator downstream of 12V/48V intermediate bus, providing clean, low-noise supply. Use Value: PFM mode reduces no-load current to <100µA, minimizing standby drain in always-on network infrastructure. |
Use Scenario: Powering portable test instruments, handheld meters, and ruggedized data loggers with Li-ion or 9V primary batteries. IC Role / Device Role / Timing Role: Main system regulator supporting wide input range (e.g., 9V–56V) from varying battery states and adapters. Use Value: 60V absolute max input withstands load-dump transients in automotive-grade portable tools without external TVS. |
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, 3.3V fixed, 500mA, 600kHz, AEC-Q100 qualified; higher RDS-ON (1.2Ω/0.7Ω), no PFM mode. | Automotive-qualified; lacks hiccup-mode protection and prebias start-up; requires external compensation. | Select for automotive environments requiring ASIL-B compliance; avoid where PFM efficiency or robust fault recovery is required. |
| TPS54360DGQR | 3.5V–60V input, adjustable output, 3.5A, 100–2500kHz programmable; larger SOIC-8 package; no integrated high-side FET. | Higher current capability; requires external high-side MOSFET and compensation network; no fixed 3.3V option. | Choose when >500mA output or programmable frequency is needed; not drop-in due to pinout, package, and external FET requirement. |
Compared with LM5164QDDARQ1 and TPS54360DGQR, the MAX17501AATB+T delivers superior light-load efficiency via PFM, guaranteed hiccup-mode protection, and true fixed-output simplicity - making it optimal for industrial and telecom POE where reliability, size, and low-quiescent design dominate.
Availability
MAX17501AATB+T is available at Aetrix Electronics and suitable for industrial process control, HVAC systems, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17501AATB+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, designs precision analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The MAX17501 series targets high-voltage, low-power point-of-load conversion in space-constrained industrial and telecom systems - emphasizing integration, thermal robustness, and ease of use without external compensation.
FAQ
What is the output voltage tolerance of the MAX17501AATB+T over temperature?
The MAX17501AATB+T maintains ±1.7% output voltage accuracy over the full –40°C to +125°C ambient operating temperature range. This specification is guaranteed by design and characterization, not just tested at +25°C, ensuring reliable 3.3V regulation for sensitive digital and analog circuitry in harsh environments.
Does the MAX17501AATB+T support prebiased start-up?
Yes, the MAX17501AATB+T supports prebiased start-up: both high-side and low-side switches remain off until the first PWM pulse is commanded, preventing reverse current flow into an already-powered output rail - a critical feature for hot-swap and redundant supply configurations.
What is the function of the N.C./COMP pin on the MAX17501AATB+T?
The N.C./COMP pin (Pin 7) is a no-connect for the MAX17501AATB+T, as it is a fixed-output variant. It must remain unconnected - unlike adjustable versions (e.g., MAX17501G/H), this pin has no internal connection and is not used for loop compensation or any other function.
How does the RESET pin behave during thermal shutdown on the MAX17501AATB+T?
During thermal shutdown, the RESET pin on the MAX17501AATB+T is actively driven low, providing a clear fault indication to the host system. RESET remains low until the junction temperature cools by 10°C and soft-start completes successfully, then rises high after 1024 clock cycles once VOUT reaches 95.5% of nominal.
Can the MAX17501AATB+T operate with only ceramic capacitors?
Yes, the MAX17501AATB+T is designed for all-ceramic capacitor operation: input requires ≥1µF X7R ceramic, output uses standard ceramic types, and VCC bypass needs 1µF ceramic. No electrolytic or tantalum capacitors are required - simplifying layout and improving long-term reliability.
MAX17501AATB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- 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)
MAX17501AATB+T FAQ
1.How can I place an order for MAX17501AATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17501AATB+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 MAX17501AATB+T reliable?
The price and inventory of MAX17501AATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17501AATB+T is usually 5 days.
3.What payment methods are accepted for MAX17501AATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17501AATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17501AATB+T?
MAX17501AATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17501AATB+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 MAX17501AATB+T?
For technical support, including MAX17501AATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17501AATB+T requirements.
6.How does Aetrix verify that MAX17501AATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17501AATB+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 MAX17501AATB+T meets industry standards.
7.What is the process for return or replacement of MAX17501AATB+T?
All MAX17501AATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17501AATB+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 MAX17501AATB+T part is unused and in its original packaging.
Return procedure for MAX17501AATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX17501AATB+T Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
