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Analog Devices Inc./Maxim Integrated MAX17624ATA+T
- Part No.:
- MAX17624ATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MAX17624ATA+T.pdf
- Description:
- IC REG BUCK ADJ 1A 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,544
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Product details
Overview
MAX17624ATA+T from Maxim Integrated is a 4MHz synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS FETs, delivering up to 1A output current across an input range of 2.9V–5.5V and adjustable output voltage from 1.5V to 3.3V. It features peak-current-mode control, ±1% feedback accuracy, and operates in either forced-PWM or PFM mode-ideal for compact point-of-load regulation in battery-powered industrial sensors.
For engineers reviewing the MAX17624ATA+T datasheet, MAX17624ATA+T pinout, MAX17624ATA+T application, or MAX17624ATA+T equivalent, key selection criteria include its 4MHz fixed switching frequency, 100% duty-cycle capability, internal compensation, open-drain PGOOD output, and thermal/overcurrent protection for robust embedded power delivery.
Technical Context
The MAX17624ATA+T employs a fixed-frequency peak-current-mode control architecture with internal slope compensation and latched MODE pin logic that selects between constant-frequency PWM (for EMI-sensitive systems) or pulse-frequency modulation (for light-load efficiency). Its controller integrates soft-start ramping, prebias startup, and cycle-by-cycle current limiting.
It uses internally compensated loop dynamics optimized for 1µH inductors and 10µF ceramic output capacitors, supporting 100% duty-cycle operation to maximize battery utilization. Protection includes overtemperature shutdown at +165°C (10°C hysteresis), valley/peak current limits (1.5A/2A typ), and undervoltage lockout with 2.8V threshold and 200mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.9V to 5.5V - supports single-cell Li-ion, USB, and standard 3.3V/5V rails without external LDO pre-regulation. |
| Switching Frequency | 4MHz fixed - enables ultra-small external components (1µH inductor, 10µF X7R ceramic output cap) and reduces EMI fundamental frequency. |
| Output Voltage Range | 1.5V to 3.3V - set via resistor divider on FB pin; internal 0.8V reference ensures ±1% regulation accuracy over temperature and load. |
| Max Output Current | 1A continuous - sustained under full ambient range (-40°C to +125°C) with proper PCB thermal design (θJA = 85.3°C/W). |
| Quiescent Current | 0.1µA in shutdown - minimizes battery drain during system sleep; EN pin controls entry/exit with 2V rising threshold. |
| Protection Features | Overcurrent (peak/valley limits), overtemperature (+165°C shutdown), UVLO (2.8V ±40mV), and open-drain PGOOD with 93.5%/90% thresholds. |
| Package | 8-pin TDFN (2mm × 2mm, T822+3C) - exposed pad requires direct GND connection with multiple thermal vias for junction-to-case θJC = 8.9°C/W. |
Pinout & Package
MAX17624ATA+T is housed in an 8-pin, 2mm × 2mm TDFN package (package code T822+3C) with exposed thermal pad (EP) that must be soldered to a dedicated GND plane using ≥4 thermal vias for reliable thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power input supply | Accepts 2.9V–5.5V; requires local 2.2µF ceramic decoupling capacitor placed adjacent to IN and GND pins. |
| 2 GND | Power ground reference | Primary return path for power and control circuits; connects directly to EP and large PCB ground plane. |
| 3 EN | Active-high enable | Drives internal reference ramp; 2V min rising threshold initiates 1ms soft-start; pulled low disables all circuitry (<0.1µA IQ). |
| 4 MODE | Operation mode select | Ground = forced-PWM (4MHz fixed); floating = PFM (pulse-skipping at light loads); latched at power-up only. |
| 5 PGOOD | Open-drain power-good indicator | Asserts high when VOUT > 93.5% of target; deasserts low at <90%; 184µs delay after soft-start completion. |
| 6 FB | Feedback voltage sense | Monitors resistive divider from VOUT; internal 0.8V reference enables precise output setting (1.5V–3.3V range). |
| 7 OUTSNS | Output voltage Kelvin sense | Connects to positive terminal of COUT via separate trace to reject PCB IR drop and improve regulation accuracy. |
| 8 LX | Switching node | Drives external 1µH inductor; high dv/dt node requiring short, low-inductance layout; connects to both MOSFETs internally. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates external compensation components; optimized for 1µH inductor and 10µF ceramic output capacitor. |
| Selectably forced-PWM or PFM operation | MODE pin configures fixed 4MHz switching (PWM) or pulse-skipping (PFM) - balances EMI control vs. light-load efficiency. |
| 100% duty-cycle capability | Enables dropout-free operation down to VIN ≈ VOUT + IOUT×(RDS_ONH + DCR_L), extending usable battery voltage range. |
| Prebias startup support | Allows safe soft-start into precharged output without discharging COUT - critical for multi-rail digital systems. |
| Robust protection suite | Includes cycle-by-cycle overcurrent, thermal shutdown (+165°C), UVLO (2.8V), and open-drain PGOOD with tight voltage thresholds. |
Applications
| Industrial Sensor Node Power | Portable Medical Device Rail |
|---|---|
|
Use Scenario: Powering low-power microcontrollers, analog front-ends, and wireless transceivers in battery-operated environmental sensors. IC Role / Device Role / Timing Role: Primary step-down regulator converting 3.7V Li-ion to stable 3.3V or 2.5V rail with minimal footprint and thermal rise. Use Value: 4MHz operation allows 1µH inductor and 10µF output cap, reducing solution size by >40% vs. 2MHz alternatives; PFM mode extends battery life during idle sensing intervals. |
Use Scenario: Generating clean, regulated 1.8V or 2.8V supplies for ADCs, op-amps, and Bluetooth LE modules in handheld diagnostics tools. IC Role / Device Role / Timing Role: High-accuracy, low-noise point-of-load converter with ±1% feedback tolerance and PGOOD monitoring for system health reporting. Use Value: Internal compensation and prebias startup ensure reliable power sequencing across multiple rails; 100% duty cycle maintains regulation until battery drops to ~2.9V. |
| Smart Meter Auxiliary Supply | IoT Edge Node Core Rail |
|
Use Scenario: Providing isolated auxiliary 3.3V rail from 5V PLC or RS-485 interface supply in utility smart meters. IC Role / Device Role / Timing Role: Compact, thermally efficient buck converter operating continuously in harsh ambient conditions (-40°C to +125°C). Use Value: TDFN package with exposed pad and θJA = 85.3°C/W enables convection-only cooling; overtemperature protection prevents field failures during prolonged high-load events. |
Use Scenario: Delivering 1.5V core voltage to ARM Cortex-M microcontrollers in always-on edge AI sensors with intermittent burst processing. IC Role / Device Role / Timing Role: Fast-transient response buck regulator with 1ms soft-start and PGOOD signaling for coordinated firmware boot sequence. Use Value: Peak-current-mode control and 4MHz switching yield fast load-step recovery (<10µs); PGOOD assertion confirms rail stability before MCU release from reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17623ATA+T | 2MHz switching frequency; output range 0.8V–1.5V; optimized for 1.5µH inductor and 22µF output capacitor. | Better suited for sub-1.5V core rails (e.g., FPGA I/O, low-voltage logic) where lower frequency eases EMI filtering but increases inductor size. | Select MAX17623ATA+T when output ≤1.5V and board space permits larger magnetics; MAX17624ATA+T is mandatory for 1.5V–3.3V outputs. |
| TPS62840DLCR | 2.7V–6.5V input; 0.6V–5.5V output; 2.4MHz switching; 200nA IQ in shutdown; no integrated OUTSNS pin. | Lacks Kelvin sense (OUTSNS), limiting regulation accuracy under high-PCB-resistance conditions; superior ultra-low-IQ for multi-year battery life. | Choose TPS62840DLCR for extreme low-power IoT endpoints where 200nA shutdown current outweighs need for precision Kelvin sensing. |
Compared with MAX17623ATA+T, MAX17624ATA+T delivers higher output voltages and faster switching for smaller passives, while TPS62840DLCR trades sensing precision for nanoscale quiescent current-making MAX17624ATA+T optimal for 1.5V–3.3V industrial sensor rails demanding accuracy, thermal resilience, and compactness.
Availability
MAX17624ATA+T is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical devices, smart meter auxiliary supplies, and IoT edge node core rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17624ATA+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, automotive, and communications applications.
The MAX17624ATA+T belongs to the Himalaya series of DC-DC converters engineered for cooler, smaller, and simpler power solutions-specifically targeting space-constrained, thermally demanding embedded systems requiring high integration and reliability.
FAQ
What is the maximum output voltage supported by the MAX17624ATA+T?
The MAX17624ATA+T supports an adjustable output voltage range from 1.5V to 3.3V, set using an external resistor divider connected to the FB pin. Its internal 0.8V reference and ±1% feedback accuracy ensure stable regulation across this range under full load and temperature conditions. The MAX17624ATA+T cannot regulate below 1.5V - for outputs from 0.8V to 1.5V, the MAX17623ATA+T variant must be used.
Does the MAX17624ATA+T require external compensation components?
No, the MAX17624ATA+T features an internally compensated control loop optimized for use with a 1µH inductor and 10µF ceramic output capacitor. This eliminates the need for external compensation networks, simplifying design, reducing BOM count, and improving layout robustness. The internal compensation ensures stable operation across the full 1.5V–3.3V output range and -40°C to +125°C ambient temperature.
How does the MODE pin affect operation of the MAX17624ATA+T?
The MODE pin on the MAX17624ATA+T selects between two operating modes: grounding the pin enables forced-PWM mode (fixed 4MHz switching), while leaving it unconnected enables PFM mode (pulse-skipping at light loads). The selection is latched at power-up and cannot be changed dynamically. PWM mode ensures predictable EMI and supports negative inductor current; PFM improves light-load efficiency but introduces variable frequency behavior.
Can the MAX17624ATA+T start up into a prebiased output?
Yes, the MAX17624ATA+T supports startup into a prebiased output without discharging the output capacitor - in both PWM and PFM modes. This feature prevents bus contention and voltage overshoot when powering multi-rail digital systems where other regulators may already be active. Prebias startup is enabled by default and requires no configuration; it works seamlessly with the device's internal soft-start and current-limiting architecture.
What thermal considerations apply to the MAX17624ATA+T package?
The MAX17624ATA+T uses an 8-pin TDFN package (2mm × 2mm) with an exposed thermal pad (EP) that must be soldered to a solid GND plane using at least four thermal vias. With θJA = 85.3°C/W (four-layer board), junction temperature rise is calculated as TJ = TA + (85.3 × PLOSS). For high-reliability operation, keep TJ ≤ +125°C; above this, lifetime degradation accelerates. Thermal shutdown activates at +165°C with 10°C hysteresis to protect the MAX17624ATA+T under overload.
MAX17624ATA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 1A
- Frequency - Switching:
- 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (2x2)
MAX17624ATA+T FAQ
1.How can I place an order for MAX17624ATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17624ATA+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 MAX17624ATA+T reliable?
The price and inventory of MAX17624ATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17624ATA+T is usually 5 days.
3.What payment methods are accepted for MAX17624ATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17624ATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17624ATA+T?
MAX17624ATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17624ATA+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 MAX17624ATA+T?
For technical support, including MAX17624ATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17624ATA+T requirements.
6.How does Aetrix verify that MAX17624ATA+T is sourced from the original manufacturer or authorized distributors?
All MAX17624ATA+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 MAX17624ATA+T meets industry standards.
7.What is the process for return or replacement of MAX17624ATA+T?
All MAX17624ATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17624ATA+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 MAX17624ATA+T part is unused and in its original packaging.
Return procedure for MAX17624ATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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