My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX17501EATB+T
.jpg)
- Part No.:
- MAX17501EATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17501EATB+T.pdf
- Description:
- IC REG BUCK 3.3V 500MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,376
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX17501EATB+T from Maxim Integrated is a 60V input, 3.3V fixed-output, 500mA synchronous step-down DC-DC converter in a 10-pin 3mm × 2mm TDFN package. It features peak-current-mode control, 600kHz switching frequency, ±1.7% output voltage accuracy over –40°C to +125°C, and integrated high-side pMOS (0.85Ω typ) and low-side nMOS (0.35Ω typ) switches. It delivers high efficiency (>90% peak) in industrial power rails for battery-powered equipment and point-of-load regulation.
For engineers reviewing the MAX17501EATB+T datasheet, MAX17501EATB+T pinout, MAX17501EATB+T application, or MAX17501EATB+T equivalent, key selection considerations include its 4.5V–60V wide input range, resistor-programmable EN/UVLO threshold, open-drain RESET with 92.5% undervoltage trip, adjustable soft-start via external capacitor, and hiccup-mode overcurrent protection with 32,768-cycle timeout.
Technical Context
The MAX17501EATB+T implements peak-current-mode control with internal slope compensation and a transconductance error amplifier (590µS typ). Its PWM comparator compares sensed inductor current against an error-amplifier-derived reference to set duty cycle, while the 600kHz oscillator governs switching timing. The device integrates both power MOSFETs - a high-side p-channel (RDS(ON) = 0.85Ω at +25°C) and low-side n-channel (RDS(ON) = 0.35Ω at +25°C) - enabling compact, all-ceramic-capacitor designs.
It supports forced-PWM operation only (no PFM), ensuring fixed-frequency switching across all loads for EMI-sensitive systems. Protection includes cycle-by-cycle peak current limiting (760mA typ), runaway current limit (780mA typ), thermal shutdown (+165°C), and output undervoltage monitoring via the open-drain RESET pin with 95.5% rising and 92.5% falling thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - enables direct regulation from 12V/24V/48V industrial buses or unregulated battery inputs without pre-regulation. |
| Output Voltage | Fixed 3.3V ±1.7% over –40°C to +125°C - ensures stable logic supply for microcontrollers and sensors in harsh environments. |
| Max Output Current | 500mA continuous - sufficient for powering multiple low-power ICs or small FPGA I/O banks in space-constrained designs. |
| Switching Frequency | 600kHz (typ) - allows use of small, low-profile inductors (e.g., ~2.2µH) and reduces output ripple without compromising transient response. |
| Efficiency (Peak) | >90% at 24VIN/3.3VOUT/250mA - minimizes thermal load and extends battery life in portable equipment. |
| Shutdown Current | 0.9µA (typ) - enables ultra-low quiescent power in always-on monitoring circuits or wake-on-event systems. |
| Soft-Start Control | Capacitor-programmable via SS pin - prevents input inrush and output overshoot during power-up or hot-swap events. |
Pinout & Package
MAX17501EATB+T is housed in a thermally enhanced 10-pin TDFN package (3mm × 2mm, 0.6mm height) with exposed pad (EP) connected to GND for improved heat dissipation. Pin 1 is PGND; pin 10 is LX; EP must be soldered to a large GND copper plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | Low-impedance return path for high-current switch node; must connect externally to power ground plane and tie to GND at VCC bypass capacitor. |
| 2 VIN | Main Power Input | Accepts 4.5V–60V supply; requires local 1µF ceramic decoupling; absolute max rating is +70V. |
| 3 EN/UVLO | Enable / Input Undervoltage Lockout | Resistor-divider programmable turn-on threshold (1.218V rising); pull high to VIN for always-on operation. |
| 4 VCC | Internal 5V LDO Output | Bypass with 1µF ceramic to GND; powers internal circuitry and low-side gate driver; UVLO triggers at 3.7V falling. |
| 5 FB/VO | Feedback Input | Direct connection to 3.3V output (fixed version); monitors regulation and drives RESET when deviation exceeds ±7.5%. |
| 6 SS | Soft-Start Timing | Connect external capacitor to GND to control ramp rate; prevents inrush current and output overshoot. |
| 7 N.C./COMP | No Connect (Fixed Output) | Not connected on MAX17501E; reserved for external compensation on adjustable versions (G/H). |
| 8 RESET | Open-Drain Power-Good Signal | Sinks 2mA when low; asserts after 1024 cycles once FB rises above 95.5% VOUT; valid only when enabled and VIN > 4.5V. |
| 9 GND | Analog Ground | Reference for FB, SS, COMP, RESET; connect to PGND at VCC bypass cap to minimize noise coupling. |
| 10 LX | Switching Node | Connects to inductor's switch-side terminal; high-impedance in shutdown; handles up to ±1.6A RMS current. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification with integrated MOSFETs | Eliminates external Schottky diode, reduces BOM count, and improves full-load efficiency by minimizing conduction losses. |
| Fixed 3.3V output with internal feedback divider | Removes need for external resistive divider, simplifies layout, and guarantees ±1.7% accuracy over full temperature range. |
| Programmable EN/UVLO threshold | Enables precise brown-in/brown-out control using two external resistors - critical for reliable startup in variable-input systems. |
| Hiccup-mode overcurrent protection | Shuts down for 32,768 clock cycles upon runaway current detection, limiting average power dissipation during sustained overload or short-circuit. |
| Prebiased output startup support | Prevents reverse current flow into a precharged output rail - essential for hot-swap and redundant power applications. |
| Thermal shutdown with 10°C hysteresis | Disables switching at +165°C junction temperature and re-enables only after cooling to +155°C, preventing thermal runaway. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
Use Scenario: Powering analog sensor front-ends, PLC I/O modules, and isolated RS-485 transceivers in factory automation cabinets. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator converting 24V DC bus to clean, regulated logic supply. Use Value: Wide 4.5V–60V input accommodates brownout conditions; ±1.7% accuracy ensures ADC reference stability; hiccup mode protects against field-wiring faults. |
Use Scenario: Supplying microcontrollers, display drivers, and wireless SoCs in smart thermostats and building management controllers. IC Role / Device Role / Timing Role: Compact, high-efficiency DC-DC stage replacing linear regulators to reduce heat in sealed enclosures. Use Value: 600kHz switching enables tiny 2.2µH inductors; 0.9µA shutdown current extends battery backup runtime; TDFN package saves PCB area. |
| Base Station & Telecom | Battery-Powered Equipment |
Use Scenario: Generating 3.3V bias for RF front-end ICs, clock buffers, and Ethernet PHYs in remote radio units and VoIP gateways. IC Role / Device Role / Timing Role: Secondary regulator fed from intermediate 12V or 48V telecom supply rails. Use Value: Forced-PWM ensures predictable EMI profile; RESET signal synchronizes system boot sequence; thermal shutdown guards against enclosure overheating. |
Use Scenario: Regulating 3.3V for portable test instruments, handheld scanners, and IoT edge nodes powered by Li-ion or 9V batteries. IC Role / Device Role / Timing Role: Main system power converter operating across full battery discharge curve (6V–42V). Use Value: >90% peak efficiency extends operational time; prebias startup avoids output collapse during battery swap; SS pin enables controlled wake-up. |
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, 350mA output, 600kHz, AEC-Q100 qualified; no integrated VCC LDO - requires external bias. | Automotive-grade qualification; lower current rating limits use in higher-power industrial nodes. | Select LM5164QDDARQ1 only if AEC-Q100 compliance is mandatory and 350mA suffices; MAX17501EATB+T offers higher current and integrated VCC. |
| TPS54360DGQR | 3.5V–60V input, adjustable output (0.8V–58V), 3.5A output, 100kHz–2.5MHz programmable frequency; larger SOIC-8 package. | Higher current and adjustable output suit broader design reuse but require external feedback resistors and compensation. | Choose TPS54360DGQR when >500mA load or output flexibility is needed; MAX17501EATB+T provides smaller footprint and simpler fixed-3.3V implementation. |
Compared with LM5164QDDARQ1 and TPS54360DGQR, MAX17501EATB+T delivers optimal balance of compact size (3mm × 2mm), fixed 3.3V precision, 500mA capability, and integrated VCC LDO - making it ideal for space- and reliability-critical industrial and portable applications where design simplicity and thermal performance are prioritized.
Availability
MAX17501EATB+T is available at Aetrix Electronics and suitable for industrial process control, HVAC systems, and battery-powered equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX17501EATB+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX17501 series was designed as ultra-small, high-voltage synchronous buck converters targeting space-constrained industrial and portable applications needing robust input range, precise regulation, and integrated protection - with MAX17501EATB+T optimized for 3.3V fixed-output use cases.
FAQ
What is the maximum input voltage rating for the MAX17501EATB+T?
The MAX17501EATB+T has an absolute maximum input voltage rating of +70V, with guaranteed operation from 4.5V to 60V. Exceeding 60V may cause functional instability, and operation above +70V risks permanent damage. The device's overvoltage tolerance supports transient surges common in 48V industrial buses and automotive cold-crank scenarios.
Does the MAX17501EATB+T support PFM mode for light-load efficiency?
No, the MAX17501EATB+T operates exclusively in forced-PWM mode - it does not support pulse-frequency modulation. This ensures constant 600kHz switching across all load conditions, which simplifies EMI filtering and avoids audible noise in sensitive applications. PFM operation is only available on MAX17501A/B variants.
How is the EN/UVLO threshold programmed on the MAX17501EATB+T?
The EN/UVLO threshold is set using an external resistor divider between VIN and GND, connected to pin 3 (EN/UVLO). With a typical rising threshold of 1.218V, selecting R1 and R2 such that VEN = VIN × R2/(R1 + R2) = 1.218V establishes the turn-on voltage. For example, a 1MΩ top resistor and 25.5kΩ bottom resistor sets activation at ~48V.
What is the purpose of the N.C./COMP pin on the MAX17501EATB+T?
Pin 7 (N.C./COMP) is a no-connect on the MAX17501EATB+T because it is a fixed-output variant. It is reserved for external loop compensation on adjustable-output versions (MAX17501G/H). Leaving this pin unconnected is mandatory; routing traces or capacitors to it may disrupt internal biasing or cause instability.
Can the MAX17501EATB+T safely start into a precharged 3.3V output?
Yes, the MAX17501EATB+T supports prebiased output startup. When enabled into a precharged rail, both high-side and low-side MOSFETs remain off until the first PWM command, preventing reverse current flow and output voltage collapse. This behavior is confirmed in the datasheet's "Prebiased Output" section and validated in typical operating waveforms (Figure MAX17501 toc28).
MAX17501EATB+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)
MAX17501EATB+T FAQ
1.How can I place an order for MAX17501EATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17501EATB+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 MAX17501EATB+T reliable?
The price and inventory of MAX17501EATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17501EATB+T is usually 5 days.
3.What payment methods are accepted for MAX17501EATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17501EATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17501EATB+T?
MAX17501EATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17501EATB+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 MAX17501EATB+T?
For technical support, including MAX17501EATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17501EATB+T requirements.
6.How does Aetrix verify that MAX17501EATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17501EATB+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 MAX17501EATB+T meets industry standards.
7.What is the process for return or replacement of MAX17501EATB+T?
All MAX17501EATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17501EATB+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 MAX17501EATB+T part is unused and in its original packaging.
Return procedure for MAX17501EATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX17501EATB+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…
