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Analog Devices Inc./Maxim Integrated MAX17244ETESA+
- Part No.:
- MAX17244ETESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX17244ETESA+.pdf
- Description:
- IC REG BCK PROG/1V 2.5A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,637
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Product details
Overview
MAX17244ETESA+ 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 MAX17244ETESA+ datasheet, MAX17244ETESA+ pinout, MAX17244ETESA+ application, or MAX17244ETESA+ equivalent, key selection criteria include its 98% max duty cycle for dropout operation, 220kHz–2.2MHz resistor-programmable switching frequency, spread-spectrum EMI reduction, power-good output, and 180° out-of-phase SYNCOUT for cascaded supplies.
Technical Context
The MAX17244ETESA+ uses current-mode control with selectable PWM (fixed-frequency) or PFM (pulse-skipping) operation-PFM disables negative inductor current and skips pulses at light loads to achieve >90% peak efficiency. Its FSYNC pin selects mode: AGND enables PFM; BIAS or external clock enables forced-PWM.
It integrates a 5V BIAS linear regulator (4.7–5.4V output), features cycle-by-cycle current limiting, thermal shutdown with 15°C hysteresis, overvoltage protection at 105% VFB, and automatic LX slew-rate adjustment (4ns/8ns) based on switching frequency to optimize EMI vs. efficiency trade-offs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V continuous, with 42V transient protection - supports automotive cold-crank and industrial wide-input applications. |
| Output Current | Up to 2.5A continuous - sufficient for point-of-load regulation of microcontrollers, sensors, and RF transceivers. |
| Output Voltage Options | Fixed 5V (±2%) or 3.3V (±2%), or adjustable 1V–10V via FB resistive divider - enables flexible system-level voltage scaling. |
| Quiescent Current | 28µA typical in standby - extends battery life in always-on IoT and automotive modules. |
| Switching Frequency | 220kHz–2.2MHz, resistor-programmable (RFOSC) and externally synchronizable - allows layout-optimized EMI control and inductor size reduction. |
| Efficiency | >90% peak efficiency - achieved via synchronous rectification, all-ceramic capacitor support, and PFM/PWM load-adaptive operation. |
| Duty Cycle Max | 98% - enables ultra-low dropout operation during undervoltage transients (e.g., 12V input → 5V output at <1.2V drop). |
Pinout & Package
MAX17244ETESA+ is housed in a 16-pin TQFN (5mm × 5mm, exposed pad) package optimized for thermal dissipation and compact PCB layout. The exposed pad (EP) must be connected to PGND for effective heat transfer and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNCOUT | Open-drain clock output | Provides 180° out-of-phase signal relative to internal oscillator - enables phase-interleaved multi-converter designs to reduce input ripple and EMI. |
| FSYNC | Mode-select logic input | AGND = PFM mode (low IQ); BIAS or external clock = forced-PWM (fixed frequency, low EMI variation) - critical for RF supply stability. |
| FOSC | Frequency-setting input | Resistor-to-AGND sets switching frequency (220kHz–2.2MHz) - determines inductor size, capacitor count, and core loss vs. conduction loss trade-off. |
| FB | Feedback input | Monitors output via resistive divider (VFB = 1.0V ±1.5%) - enables precise regulation across 1V–10V range or fixed 3.3V/5V when tied to BIAS. |
| PGOOD | Open-drain power-good flag | Asserts high when VOUT ≥ 95% VFB; deasserts low at ≤92% - simplifies power sequencing and fault detection in multi-rail systems. |
| EN | High-voltage enable input | Compatible with 3.5V–42V logic levels - allows direct connection to automotive KL30 or CAN transceiver INH pins without level-shifting. |
| LX | Switching node | Connects to inductor and Schottky diode cathode - requires snubber (1Ω + 220pF) when VIN ≥25V, VOUT ≤5V, fSW ≥1.8MHz to suppress ringing. |
| BST | Bootstrap supply | 0.1µF capacitor between BST and LX powers high-side gate driver - ensures robust turn-on of integrated MOSFET under all load conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates external switches and reduces BOM count - RON_H = 220mΩ (max), RON_L = 3Ω (max) enable high-efficiency synchronous operation. |
| All-ceramic capacitor support | Enables ultra-compact, low-profile designs - no electrolytic or tantalum capacitors required for stable operation. |
| Spread-spectrum modulation (S-version) | ±6% frequency dither centered on fSW - reduces peak EMI by spreading energy across spectrum, factory-enabled in MAX17244ETESA+. |
| Automatic LX slew-rate control | 4ns rise time at fSW >1.1MHz; 8ns at lower frequencies - dynamically optimizes EMI vs. switching loss without external tuning. |
| Power sequencing support | PGOOD output and high-voltage EN input simplify coordination with upstream regulators or microcontroller reset logic. |
Applications
| Automotive Body Control Module (BCM) | Industrial IoT Sensor Node |
|---|---|
Use Scenario: Powering MCU, CAN transceiver, and analog front-end from 12V battery with cold-crank resilience. IC Role / Device Role / Timing Role: Primary 5V/3.3V point-of-load regulator with 42V transient tolerance and 98% duty cycle dropout recovery. Use Value: Maintains regulated output during 6V battery dips; 28µA quiescent current prevents battery drain in sleep mode. | Use Scenario: Battery-powered wireless sensor with LoRa/Bluetooth radio requiring low-noise, EMI-compliant 3.3V supply. IC Role / Device Role / Timing Role: Synchronous buck converter operating in forced-PWM mode synchronized to host MCU clock to suppress switching noise in RF band. Use Value: Spread-spectrum + fixed-frequency FPWM eliminates EMI peaks interfering with sub-GHz ISM band reception. |
| Medical Portable Diagnostic Device | Telecom Remote Radio Unit (RRU) |
Use Scenario: Compact handheld ultrasound or glucose meter needing reliable 3.3V/5V rails from single-cell Li-ion or USB input. IC Role / Device Role / Timing Role: Wide-input (3.5V–36V) buck converter supporting both battery and wall-adapter inputs with seamless transition. Use Value: Adjustable 1V–10V output accommodates diverse subsystem voltages; thermal shutdown with auto-recovery ensures safe operation during enclosure overheating. | Use Scenario: Outdoor small-cell base station requiring high-reliability 5V supply for FPGA and ADCs in temperature-varying environments. IC Role / Device Role / Timing Role: Cascaded power stage using SYNCOUT to drive second MAX17244ETESA+ in 180° phase - cuts input capacitor RMS current by ~30%. Use Value: Phase interleaving reduces bulk capacitance requirements and improves thermal distribution across PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 1.5A, 1.2MHz fixed freq, no PFM mode, no spread-spectrum | Higher VIN range suits 48V industrial buses; lower IOUT limits use in 2.5A loads | Select if 65V transient tolerance is mandatory and light-load efficiency is secondary. |
| TPS54240DGQR | 3.5V–42V input, 2.5A, 100kHz–2.5MHz adjustable, no integrated low-side FET, higher Qg | Requires external low-side MOSFET and bootstrap circuit - increases layout complexity and BOM cost | Choose only if design requires custom gate drive timing or discrete FET optimization. |
Compared with LM5164QPWPRQ1 and TPS54240DGQR, MAX17244ETESA+ delivers superior light-load efficiency via PFM mode, integrated low-side FET reduces component count, and factory-enabled spread-spectrum provides out-of-box EMI compliance - making it optimal for space-constrained, battery-sensitive, and RF-cohabiting applications.
Availability
MAX17244ETESA+ is available at Aetrix Electronics and suitable for automotive body electronics, industrial IoT sensor nodes, portable medical diagnostics, and telecom remote radio units requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MAX17244ETESA+ 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 demanding industrial, automotive, and communications applications.
The MAX17244 belongs to Maxim's high-efficiency, wide-input synchronous buck converter product line, engineered specifically for EMI-sensitive, battery-conscious, and transient-resilient power delivery in compact embedded systems.
FAQ
What is the maximum input voltage transient rating for MAX17244ETESA+?
The MAX17244ETESA+ supports 42V input voltage transients for durations under 1 second. This rating applies to short-duration spikes such as load dump in automotive systems. The device remains functional and protected without latch-up or damage, provided the absolute maximum ratings (e.g., LX to PGND ≤ +42V) are not exceeded for longer than 50ns under normal operation.
Does MAX17244ETESA+ require an external Schottky diode?
Yes, MAX17244ETESA+ requires an external Schottky diode connected from LX to PGND. Although it integrates both high-side and low-side MOSFETs, the datasheet explicitly states the low-side MOSFET is used only for fixed-frequency forced-PWM operation under light loads - the Schottky diode remains necessary to support full 2.5A output current and ensure stable operation across all load conditions.
How is the output voltage set to 5V on MAX17244ETESA+?
To set MAX17244ETESA+ to fixed 5V output, connect the FB pin directly to the BIAS pin. This configuration leverages the internal 1.0V feedback reference and BIAS regulator to deliver a tightly regulated 5.0V ±2% output. No external resistors are needed, simplifying design and improving accuracy compared to resistor-divider configurations.
What is the purpose of the SYNCOUT pin on MAX17244ETESA+?
The SYNCOUT pin on MAX17244ETESA+ provides an open-drain, 180° out-of-phase clock signal relative to the internal oscillator. When used to drive a second MAX17244ETESA+ (via its FSYNC pin), it enables phase-interleaved operation - reducing input capacitor RMS current, lowering EMI, and distributing thermal load across multiple converters in high-power cascaded supplies.
Can MAX17244ETESA+ operate in dropout condition, and what is the minimum input-output differential?
Yes, MAX17244ETESA+ operates in dropout by achieving up to 98% duty cycle. At 5V output, the theoretical minimum input is approximately VOUT + (IOUT × RON_H) / 0.98 ≈ 5.55V at 2.5A (using RON_H = 220mΩ max). In practice, with efficiency and layout losses, it sustains regulation down to ~5.8V input - enabling functionality during severe automotive brownouts.
MAX17244ETESA+ 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)
MAX17244ETESA+ FAQ
1.How can I place an order for MAX17244ETESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17244ETESA+ 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 MAX17244ETESA+ reliable?
The price and inventory of MAX17244ETESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17244ETESA+ is usually 5 days.
3.What payment methods are accepted for MAX17244ETESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17244ETESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17244ETESA+?
MAX17244ETESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17244ETESA+ 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 MAX17244ETESA+?
For technical support, including MAX17244ETESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17244ETESA+ requirements.
6.How does Aetrix verify that MAX17244ETESA+ is sourced from the original manufacturer or authorized distributors?
All MAX17244ETESA+ 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 MAX17244ETESA+ meets industry standards.
7.What is the process for return or replacement of MAX17244ETESA+?
All MAX17244ETESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17244ETESA+, 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 MAX17244ETESA+ part is unused and in its original packaging.
Return procedure for MAX17244ETESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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