My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX17244ETERB+
- Part No.:
- MAX17244ETERB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX17244ETERB+.pdf
- Description:
- IC REG BCK PROG/1V 2.5A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,425
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX17244ETERB+ from Maxim Integrated is a 3.5V–36V input, 2.5A synchronous step-down DC-DC converter with integrated high-side and low-side MOSFETs, fixed 5V/3.3V or adjustable 1V–10V output, 28µA quiescent current, and 42V transient protection. It operates in PWM or PFM mode and supports external synchronization for EMI-sensitive RF power supplies.
For engineers reviewing the MAX17244ETERB+ datasheet, MAX17244ETERB+ pinout, MAX17244ETERB+ application, or MAX17244ETERB+ equivalent, key selection criteria include input transient tolerance (42V), light-load efficiency optimization (PFM/FPWM toggle via FSYNC), 98% max duty cycle for dropout operation, and spread-spectrum EMI reduction - all validated for industrial and automotive point-of-load designs.
Technical Context
The MAX17244ETERB+ uses current-mode control with resistor-programmable switching frequency (220kHz–2.2MHz) and supports external clock synchronization via FSYNC. Its dual-mode operation enables fixed-frequency PWM for EMI-critical RF transceivers or pulse-skipping PFM for ultra-low quiescent current (28µA typical) at light loads.
It integrates a 5V BIAS linear regulator, open-drain PGOOD output with ±3% hysteresis, and 180° out-of-phase SYNCOUT for cascaded supply designs. Protection includes cycle-by-cycle current limiting, thermal shutdown with 15°C hysteresis, overvoltage protection (105% VFB trip), and automatic LX slew-rate adjustment optimized per switching frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V continuous; withstands 42V transients ≤50ns - enables robust operation in automotive cold-crank and industrial surge environments. |
| Output Current | Up to 2.5A continuous; peak LX current limit 3.75A - supports demanding point-of-load rails without external current sensing. |
| Output Voltage Options | Fixed 5V (±2%) or 3.3V (±2%), or adjustable 1V–10V via FB divider - simplifies design across multiple system voltage domains. |
| Quiescent Current | 28µA typical in standby; 5µA in shutdown - extends battery life in always-on IoT and telematics applications. |
| Switching Frequency | 220kHz–2.2MHz (resistor-programmed); synchronizable externally - allows layout-optimized inductor/capacitor selection and EMI band placement. |
| Efficiency | >90% peak efficiency; maintains >85% at 10mA load in PFM mode - reduces thermal load in sealed enclosures and high-density PCBs. |
| Duty Cycle Max | 98% typical - enables regulation down to VIN ≈ VOUT/0.98 + IOUT×RON_H, critical for wide-input undervoltage hold-up. |
Pinout & Package
MAX17244ETERB+ is housed in a 5mm × 5mm, 16-pin TQFN package with exposed pad (EP), rated for –40°C to +85°C operation. The EP must be soldered to a large-area PGND copper plane for thermal management and cannot serve as sole ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNCOUT (Pin 10) | Open-drain clock output | Delivers 180° out-of-phase signal vs. internal oscillator; enables synchronized multi-rail cascading with minimal phase noise coupling. |
| FSYNC (Pin 2) | Mode-select logic input | Connect to AGND for PFM (low IQ); connect to BIAS or external clock for forced-PWM (fixed fSW, EMI control). |
| FOSC (Pin 3) | Frequency-setting input | Resistor-to-AGND sets fSW from 220kHz–2.2MHz; enables trade-off between size (high fSW) and efficiency (low fSW). |
| FB (Pin 5) | Voltage feedback node | Monitors output via resistive divider; regulates to 1.0V reference - supports precise 1V–10V programmability with ±0.5% load regulation. |
| PGOOD (Pin 16) | Open-drain status flag | Asserts high when VOUT ≥95% VFB; deasserts at ≤92% VFB - provides clean power-sequencing signal for FPGA/CPU reset logic. |
| EN (Pin 10) | High-voltage enable input | Logic-compatible with 3.5V–42V inputs (e.g., KL30, CAN INH); enables direct battery monitoring without level-shifting. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates external switch selection; RON_H = 220mΩ max, RON_L = 3Ω max - reduces BOM count and improves thermal performance in compact layouts. |
| All-ceramic capacitor support | Enables full ceramic input/output filtering (CIN = 4.7µF ×2, COUT = 22µF) - removes electrolytic bulk caps, enhancing lifetime and reliability in high-temp environments. |
| Spread-spectrum modulation (factory-enabled) | ±6% fSW dither centered on FOSC setting - reduces peak EMI by >10dB without altering filter design or layout. |
| Automatic LX slew-rate control | 4ns rise time at fSW >1.1MHz; 8ns at fSW <1.1MHz - dynamically balances EMI suppression and switching loss across operating frequencies. |
| Power-good and sync outputs | PGOOD with 25µs debounce; SYNCOUT with 180° phase shift - enables deterministic multi-rail sequencing and interleaved converter stacking without external timing ICs. |
Applications
| Distributed Supply Regulation | Wall Transformer Regulation |
|---|---|
|
Use Scenario: Powering isolated subsystems (e.g., sensor nodes, interface modules) from a shared 24V industrial bus with varying load profiles. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 5V/3.3V with 98% duty cycle capability during bus dips. Use Value: Maintains regulation during 36V→12V transients without brownout; PFM mode cuts standby IQ to 28µA, extending system uptime. |
Use Scenario: Replacing linear regulators in AC/DC wall adapters to improve efficiency and reduce heat in compact enclosures. IC Role / Device Role / Timing Role: High-efficiency step-down stage converting rectified 30V–40V to 5V/2.5A for USB-C PD accessories. Use Value: Achieves >90% efficiency at full load and <100µA no-load consumption - meets DOE Level VI and EU CoC Tier 2 requirements. |
| General-Purpose Point-of-Load | RF Transceiver Power Supply |
|
Use Scenario: Local regulation for microcontrollers, ADCs, or communication ICs on dense PCBs where space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Compact 5V PoL converter using 2.2MHz switching and all-ceramic passives to minimize footprint. Use Value: 5mm × 5mm TQFN + 2.2µH inductor fits within 120mm² area; spread-spectrum reduces conducted EMI below CISPR-22 Class B limits. |
Use Scenario: Clean, low-noise 3.3V rail for LTE/Wi-Fi transceivers requiring strict spectral purity and minimal switching interference. IC Role / Device Role / Timing Role: Forced-PWM (FPWM) mode locked to fixed 2.2MHz via FSYNC - eliminates frequency jitter that modulates RF carriers. Use Value: Fixed fSW prevents sideband generation in RX band; PGOOD ensures transceiver enable only after rail stability (±2% at 2.5A). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | 4.5V–36V input, 8A output, 12µA IQ, but no integrated BIAS LDO or spread-spectrum - requires external bias supply and external EMI filters. | Better suited for high-current motor drives; lacks PGOOD accuracy (±4%) and FSYNC flexibility for RF systems. | Choose LM61480RQWR only when >5A output or lower IQ is mandatory; MAX17244ETERB+ offers superior integration for mixed-signal PoL. |
| TPS54202HDDCR | 4.5V–28V input, 2A output, 26µA IQ, no 42V transient rating, no SYNCOUT, and no spread-spectrum - limited to non-automotive environments. | Targeted at cost-sensitive consumer electronics; lacks thermal shutdown hysteresis and overvoltage protection thresholds. | Select TPS54202HDDCR for budget-limited commercial designs; MAX17244ETERB+ delivers automotive-grade robustness and RF-ready features. |
Compared with LM61480RQWR and TPS54202HDDCR, MAX17244ETERB+ uniquely combines 42V transient tolerance, integrated BIAS LDO, 180° SYNCOUT, and factory-enabled spread-spectrum - making it optimal for space-constrained, EMI-sensitive, and automotive-qualified power rails.
Availability
MAX17244ETERB+ is available at Aetrix Electronics and suitable for distributed supply regulation, wall transformer replacement, and general-purpose point-of-load applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for MAX17244ETERB+ 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, automotive, and communications markets.
The MAX17244 is part of Maxim's high-efficiency, wide-input synchronous buck converter family, engineered for robust point-of-load regulation in harsh environments with stringent EMI and thermal constraints.
FAQ
What is the maximum input voltage transient tolerance of the MAX17244ETERB+?
The MAX17244ETERB+ withstands 42V input transients for durations ≤50ns under normal operation and full-load conditions. This rating is self-protected without external clamping components, enabling reliable use in automotive cold-crank (ISO 16750-2) and industrial surge environments. The device remains functional beyond 36V nominal input as long as transient energy stays within JEDEC-defined limits.
How does the MAX17244ETERB+ achieve low quiescent current in light-load conditions?
The MAX17244ETERB+ achieves 28µA typical quiescent current by entering pulse-frequency modulation (PFM) mode when FSYNC is pulled to AGND. In PFM, the controller disables negative inductor current and skips switching cycles at light loads, reducing gate charge and switching losses. Shutdown current drops further to 5µA when EN is driven low.
Can the MAX17244ETERB+ operate in dropout mode, and what is its maximum duty cycle?
Yes, the MAX17244ETERB+ operates in dropout mode with a typical maximum duty cycle of 98%. When input voltage approaches output voltage, the IC sustains regulation by extending on-time - enabling stable 5V output even with 5.1V input. The dropout condition is actively monitored per cycle, and the off-time threshold (25ns) triggers forced low-side conduction to maintain control.
What is the purpose of the SYNCOUT pin on the MAX17244ETERB+?
The SYNCOUT pin on the MAX17244ETERB+ provides an open-drain 180° out-of-phase clock signal relative to the internal oscillator. It enables precise interleaving of multiple MAX17244ETERB+ converters to reduce input/output ripple current and total RMS input capacitance - critical for high-power, low-EMI multi-phase supplies without external timing controllers.
Does the MAX17244ETERB+ support adjustable output voltage, and how is it configured?
Yes, the MAX17244ETERB+ supports adjustable output from 1V to 10V using an external resistive divider from OUT to FB to AGND. The FB pin regulates to a precise 1.0V reference (±1.5mV), and the divider ratio determines VOUT. For fixed 5V or 3.3V, connect FB directly to BIAS - eliminating external resistors and ensuring ±2% accuracy across temperature and line.
MAX17244ETERB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V (3.3V)
- Voltage - Output (Max):
- 10V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 400kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX17244ETERB+ FAQ
1.How can I place an order for MAX17244ETERB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17244ETERB+ 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 MAX17244ETERB+ reliable?
The price and inventory of MAX17244ETERB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17244ETERB+ is usually 5 days.
3.What payment methods are accepted for MAX17244ETERB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17244ETERB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17244ETERB+?
MAX17244ETERB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17244ETERB+ 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 MAX17244ETERB+?
For technical support, including MAX17244ETERB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17244ETERB+ requirements.
6.How does Aetrix verify that MAX17244ETERB+ is sourced from the original manufacturer or authorized distributors?
All MAX17244ETERB+ 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 MAX17244ETERB+ meets industry standards.
7.What is the process for return or replacement of MAX17244ETERB+?
All MAX17244ETERB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17244ETERB+, 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 MAX17244ETERB+ part is unused and in its original packaging.
Return procedure for MAX17244ETERB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX17244ETERB+ 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…
