My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX17502EATB+
.jpg)
- Part No.:
- MAX17502EATB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17502EATB+.pdf
- Description:
- IC REG BUCK 3.3V 1A 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,056
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX17502EATB+ from Maxim Integrated is a 60V input, 1A synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS FETs, delivering fixed 3.3V output with ±1.7% regulation accuracy over –40°C to +125°C ambient. It operates at 600kHz switching frequency, achieves >90% peak efficiency, and features programmable soft-start, EN/UVLO, and open-drain RESET for industrial power management in space-constrained systems.
For engineers reviewing the MAX17502EATB+ datasheet, MAX17502EATB+ pinout, MAX17502EATB+ application, or MAX17502EATB+ equivalent, key selection criteria include its 4.5V–60V wide input range, internal MOSFETs eliminating external Schottky diodes, all-ceramic capacitor support, TDFN-10 (3mm × 2mm) ultra-small footprint, and hiccup-mode overcurrent protection for robust operation in harsh environments.
Technical Context
The MAX17502EATB+ employs peak-current-mode control with fixed-frequency PWM, using an internal transconductance error amplifier (GM = 590µS typ) and slope compensation to ensure stable regulation across line, load, and temperature. Its integrated 0.85Ω high-side pMOS and 0.35Ω low-side nMOS deliver up to 1A continuous output while maintaining >90% efficiency at full load under 24V input.
It implements comprehensive protection: cycle-by-cycle peak current limit (1.65A typ), runaway current limit (1.7A typ), sink current limit (0.65A typ), thermal shutdown at +165°C with 10°C hysteresis, and output voltage monitoring via open-drain RESET with 92.5% undervoltage and 95.5% overvoltage thresholds referenced to FB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial bus voltages including 12V, 24V, 36V, and 48V systems without external pre-regulation. |
| Output Voltage | Fixed 3.3V ±1.7% - guaranteed accuracy over –40°C to +125°C ambient enables reliable logic supply in extended-temperature applications. |
| Switching Frequency | 600kHz (typ) - enables compact magnetics and low-output-ripple design with minimal EMI filtering requirements. |
| Peak Efficiency | >90% - achieved using integrated low-RDS(on) MOSFETs (0.85Ω HS / 0.35Ω LS), reducing conduction loss and thermal stress. |
| Shutdown Current | 0.9µA (typ) - ultra-low quiescent draw extends battery life in always-on or low-power wake-up systems. |
| RESET Threshold Accuracy | VOUT-OKR = 95.5% ±2%, VOUT-OKF = 92.5% ±2% - precise power-good signaling ensures deterministic system boot sequencing. |
| Thermal Protection | Hiccup-mode shutdown at +165°C junction with 10°C hysteresis - prevents thermal runaway during overload or poor PCB heatsinking. |
Pinout & Package
MAX17502EATB+ is housed in a 10-pin, 3mm × 2mm TDFN package with exposed pad (EP) for enhanced thermal performance. The package supports ≤1188.7mW continuous power dissipation at +70°C ambient (θJA = 67.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power Ground | High-current return path for LX switch 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 DC; requires ≥2.2µF X7R ceramic input capacitance close to pin for ripple suppression and stability. |
| 3 EN/UVLO | Enable / Input UVLO Control | Resistor-divider programmable turn-on threshold (1.218V typ 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; shuts down if VCC drops below 3.7V. |
| 5 FB/VO | Feedback Input | Direct connection to 3.3V output for fixed-voltage regulation; internal reference is 0.9V, enabling accurate closed-loop control. |
| 6 SS | Soft-Start Timing | Capacitor-to-GND sets soft-start time (tSS ≈ 5.55µs × CSS); reduces inrush current during power-up and prebiased start. |
| 7 N.C./COMP | No Connect (Fixed-Vout) | Not connected internally for MAX17502E; must remain unconnected - no external compensation required. |
| 8 RESET | Open-Drain Power-Good | Active-low signal pulled low when VOUT < 92.5%; rises after 1024 clock cycles once VOUT > 95.5%; requires external pullup. |
| 9 GND | Analog Ground | Low-noise reference for FB, COMP, and internal circuits; separate from PGND but tied together at single-point VCC bypass. |
| 10 LX | Switching Node | Connects to inductor's switch-side terminal; high-impedance during shutdown; handles ±1.6A RMS current. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 0.85Ω pMOS high-side and 0.35Ω nMOS low-side eliminate external Schottky diode, improving efficiency by ~5–8% and reducing BOM count. |
| All-ceramic capacitor support | Stable operation with only X7R MLCCs on input (≥2.2µF) and output (≥22µF for 3.3V), enabling ultra-compact, low-profile PCB layouts. |
| Programmable EN/UVLO | Resistor-divider on EN/UVLO pin sets precise turn-on voltage (e.g., 12V or 24V rail detection), preventing brownout operation in noisy industrial supplies. |
| Hiccup-mode overcurrent protection | Triggers after one runaway current event (1.7A) or sustained VOUT drop to 71.14%, suspending switching for 32,768 cycles before retry - limits fault power dissipation to <100mW. |
| Prebiased soft-start | Starts safely into existing 3.3V output without sinking current; high- and low-side FETs remain off until first PWM pulse initiates controlled ramp-up. |
Applications
| Industrial Process Control | HVAC and Building Control |
|---|---|
|
Use Scenario: Powering PLC I/O modules, sensor transmitters, and fieldbus interface ICs in factory automation cabinets with 24V DC rails subject to load dumps and surges. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 24V/36V industrial bus to clean, regulated 3.3V for microcontrollers and analog front-ends. Use Value: 60V absolute max rating and hiccup-mode protection withstand 40V transients per ISO 16750-2; ±1.7% regulation ensures ADC reference stability across temperature. |
Use Scenario: Supplying 3.3V to HVAC controller MCUs, display drivers, and wireless communication modules (Zigbee, BLE) in thermostats and zone controllers. IC Role / Device Role / Timing Role: Compact, thermally efficient buck converter replacing discrete solutions in space-limited wall-mounted enclosures. Use Value: TDFN-10 (3mm × 2mm) footprint saves >40% board area vs. TSSOP; 600kHz switching allows use of 2.2µH inductors ≤3.2mm height. |
| Base Station Power Management | Battery-Powered Test Equipment |
|
Use Scenario: Generating 3.3V bias for RF front-end ICs, clock buffers, and FPGA configuration in small-cell base station remote radio units (RRUs). IC Role / Device Role / Timing Role: High-input-voltage buck regulator supporting 48V PoE-derived or telecom -48V (with polarity inversion) input sources. Use Value: 4.5V–60V input range accepts both standard 48V DC and boosted intermediate rails; RESET output synchronizes FPGA configuration sequence. |
Use Scenario: Powering portable oscilloscopes, multimeters, and handheld analyzers operating from 9V–36V Li-ion or alkaline battery packs. IC Role / Device Role / Timing Role: Main system regulator delivering 3.3V at up to 1A with ultra-low shutdown current for long standby life. Use Value: 0.9µA shutdown current extends shelf life; programmable soft-start prevents battery voltage sag during cold start; prebias capability avoids output collapse when hot-swapping batteries. |
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 | Automotive-grade (AEC-Q100), 65V input, 1A, adjustable output only; requires external compensation; no integrated RESET. | Targeted at automotive infotainment and ADAS; lacks fixed 3.3V option and power-good signaling. | Select LM5164QDDARQ1 only when AEC-Q100 qualification and 65V margin are mandatory; MAX17502EATB+ offers faster time-to-market for industrial designs with plug-and-play 3.3V output. |
| TPS54160DGQR | 60V input, 1.5A, adjustable output only; 3.5mA no-load IQ; no internal MOSFETs (external high/low-side FETs required). | Requires external FETs and loop compensation; larger solution size; higher BOM cost and layout complexity. | Choose TPS54160DGQR only when >1A output or custom output voltage (e.g., 2.5V) is needed; MAX17502EATB+ provides lower total solution cost and smaller footprint for fixed 3.3V. |
Compared with LM5164QDDARQ1 and TPS54160DGQR, MAX17502EATB+ delivers immediate 3.3V regulation without external components, includes integrated RESET for system sequencing, and achieves superior light-load efficiency due to its 0.9µA shutdown current - making it optimal for cost-sensitive, space-constrained industrial power rails.
Availability
MAX17502EATB+ 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 consistent parametric performance across production batches.
Supply support for MAX17502EATB+ 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, medical, and communications applications.
The MAX17502 series was developed to address demand for ultra-small, high-voltage synchronous buck regulators with integrated protection and minimal external components - targeting space- and reliability-critical industrial point-of-load applications.
FAQ
What is the maximum input voltage rating for MAX17502EATB+?
The MAX17502EATB+ has an absolute maximum input voltage rating of +70V, with guaranteed continuous operation from 4.5V to 60V. This 60V operational ceiling supports common industrial bus standards including 24V, 36V, and 48V systems, while the 70V absolute limit provides margin against transient spikes per IEC 61000-4-5.
Does MAX17502EATB+ require external MOSFETs or diodes?
No. MAX17502EATB+ integrates both high-side pMOS and low-side nMOS power switches, eliminating the need for external MOSFETs or Schottky diodes. Its synchronous architecture uses internal 0.85Ω and 0.35Ω RDS(on) FETs to achieve >90% peak efficiency and simplify PCB layout with all-ceramic capacitor support.
How does the RESET pin function on MAX17502EATB+?
The open-drain RESET pin on MAX17502EATB+ asserts low when FB falls below 92.5% of its nominal value and releases high 1024 switching cycles after FB rises above 95.5%. It requires an external pullup resistor and remains valid only when EN/UVLO is high and VIN exceeds 4.5V - providing precise power-good signaling for MCU reset sequencing.
Can MAX17502EATB+ start into a prebiased output?
Yes. MAX17502EATB+ supports prebiased start: both high-side and low-side FETs remain off until the first PWM pulse initiates, preventing reverse current flow from an existing 3.3V rail. This feature protects downstream circuitry and enables hot-swap capability in battery-backed or redundant power systems.
What package type and thermal characteristics apply to MAX17502EATB+?
MAX17502EATB+ uses a 10-pin TDFN package (3mm × 2mm) with exposed pad. Its thermal resistance is θJA = 67.3°C/W (multilayer board), enabling 1188.7mW continuous power dissipation at +70°C ambient. The exposed pad must be soldered to a large GND copper plane to realize full thermal performance.
MAX17502EATB+ 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:
- 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:
- 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)
MAX17502EATB+ FAQ
1.How can I place an order for MAX17502EATB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17502EATB+ 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 MAX17502EATB+ reliable?
The price and inventory of MAX17502EATB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17502EATB+ is usually 5 days.
3.What payment methods are accepted for MAX17502EATB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17502EATB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17502EATB+?
MAX17502EATB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17502EATB+ 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 MAX17502EATB+?
For technical support, including MAX17502EATB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17502EATB+ requirements.
6.How does Aetrix verify that MAX17502EATB+ is sourced from the original manufacturer or authorized distributors?
All MAX17502EATB+ 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 MAX17502EATB+ meets industry standards.
7.What is the process for return or replacement of MAX17502EATB+?
All MAX17502EATB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17502EATB+, 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 MAX17502EATB+ part is unused and in its original packaging.
Return procedure for MAX17502EATB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX17502EATB+ 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…
