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Analog Devices Inc./Maxim Integrated MAX17552AUB+T
- Part No.:
- MAX17552AUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX17552AUB+T.pdf
- Description:
- IC REG BUCK ADJ 100MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:12,511
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Product details
Overview
MAX17552AUB+T from Analog Devices is a Himalaya-series synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS FETs, operating from 4V to 60V input and delivering up to 100mA at 0.8V–0.9×VIN output voltage with ±1.75% regulation accuracy over –40°C to +125°C. It features peak-current-mode control, programmable 100kHz–2.2MHz switching frequency, and 22µA no-load supply current in PFM mode-ideal for industrial sensor power rails requiring ultra-low quiescent consumption and wide VIN tolerance.
For engineers reviewing the MAX17552AUB+T datasheet, MAX17552AUB+T pinout, MAX17552AUB+T application, or MAX17552AUB+T equivalent, key selection considerations include its TDFN-10 (3mm × 2mm) package, MODE-pin-configurable PFM/PWM operation, EN/UVLO programmability, open-drain RESET monitoring, and HICCUP-type overload protection specific to the MAX17552A variant.
Technical Context
The MAX17552AUB+T implements a peak-current-mode control architecture with internal slope compensation and an error amplifier comparing FB voltage against a 0.8V reference. Its MODE pin selects between forced-PWM (constant frequency, negative inductor current allowed) and PFM (pulse-skipping, zero-negative-current, 22µA IQ) modes-enabling optimization for EMI-sensitive or battery-constrained systems.
It integrates dual MOSFETs (RDS(on)H = 2.7Ω typ, RDS(on)L = 1.4Ω typ), supports external clock synchronization via RT/SYNC, and uses monotonic soft-start (5.1ms default) into prebiased outputs. Overload protection employs HICCUP mode (51ms timeout), distinct from the cycle-by-cycle peak-current limit of the base MAX17552.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - enables direct replacement of HV LDOs and operation from unregulated industrial rails (e.g., 24V/48V bus, PoE-powered sensors). |
| Output Current | Up to 100mA - sufficient for powering microcontrollers, ADCs, transceivers, and analog front-ends in space-constrained IoT nodes. |
| No-Load Supply Current | 22µA in PFM mode - extends battery life in always-on remote sensors without compromising startup speed or regulation stability. |
| Output Voltage Accuracy | ±1.75% over –40°C to +125°C - ensures reliable biasing of precision analog circuits across full industrial temperature range. |
| Switching Frequency Range | 100kHz to 2.2MHz - allows trade-off between inductor size (higher fSW) and efficiency/EMI (lower fSW); supports external clock sync for system-level noise coordination. |
| Overload Protection | HICCUP mode (51ms timeout) - limits thermal stress on internal FETs and inductor during sustained short-circuit or overload, enabling safe auto-recovery. |
| RESET Function | Open-drain output asserting low when FB falls below 92% of setpoint - provides system-level power-good signaling for MCU reset or fault logging without external comparators. |
Pinout & Package
MAX17552AUB+T is housed in a 10-pin TDFN package (3mm × 2mm, exposed pad), optimized for thermal performance (θJA = 67.3°C/W) and high-density PCB layouts. The exposed pad (EP) must be soldered to GND for electrical and thermal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power input | Bypassed with 1µF X7R ceramic; withstands 70V transient - supports robust front-end filtering in noisy industrial environments. |
| 2 EN/UVLO | Enable & UVLO input | Programmable turn-on threshold (1.25V typ rising); enables brownout protection and controlled sequencing with resistor divider. |
| 3 RT/SYNC | Oscillator timing & sync | Resistor sets fSW; AC-coupled external clock synchronizes switching to avoid beat frequencies in multi-rail systems. |
| 4 SS | Soft-start control | Capacitor sets ramp time (default 5.1ms); prevents inrush into prebiased outputs - critical for hot-swap and modular systems. |
| 5 FB | Feedback input | Monitors output via resistor divider; 0.8V reference enables precise VOUT setting from 0.8V to 0.9×VIN with minimal external components. |
| 6 VOUT | External bias rail | Connected to output capacitor via 22.1Ω resistor for 3.3V–5V outputs - improves light-load efficiency and transient response by biasing internal LDO. |
| 7 RESET | Power-good flag | Open-drain output with 2ms delay after regulation recovery - eliminates need for external supervisor IC in compact designs. |
| 8 MODE | PFM/PWM selection | Unconnected = PFM (high light-load efficiency); GND = forced-PWM (fixed frequency, EMI control) - runtime reconfigurable. |
| 9 GND | Power ground | Single-point connection point for all grounds; EP tied to this pin - essential for noise immunity and thermal dissipation. |
| 10 LX | Switch node | Drives external inductor; high-impedance in shutdown - requires careful layout to minimize EMI and ringing in high-dV/dt switching. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode - reduces BOM count, improves full-load efficiency (>90%), and simplifies thermal design. |
| Internal compensation | Removes need for external compensation network - accelerates design cycle and ensures stable loop response across all operating conditions. |
| All-ceramic capacitor support | Enables ultra-compact 2-layer PCB layouts using only MLCCs - avoids bulkier tantalum or electrolytic capacitors in space-limited modules. |
| CISPR 32 Class B compliance | Meets conducted/radiated emissions limits without added shielding or ferrites - reduces EMC debug time in industrial and building automation products. |
| Monotonic startup into prebiased output | Prevents reverse current flow during hot-insertion - protects downstream circuitry in modular sensor or field-device applications. |
Applications
| Industrial Sensors and Process Control | 4mA–20mA Current-Loop Powered Sensors |
|---|---|
Use Scenario: Powering loop-powered pressure/temperature transmitters in hazardous-area instrumentation cabinets where input voltage varies widely (12V–48V) and standby current must be minimized. IC Role / Device Role / Timing Role: Primary DC-DC regulator generating stable 3.3V or 5V rail from loop supply; operates in PFM mode during sensor sleep cycles. Use Value: 22µA no-load IQ extends battery or capacitor backup runtime; 60V max input tolerates surge transients on long cable runs. | Use Scenario: Providing isolated auxiliary power for smart valve positioners or HART modems powered solely by the 4–20mA loop. IC Role / Device Role / Timing Role: High-efficiency buck converter stepping down loop-derived voltage (typically ~24V) to 3.3V for microcontroller and analog circuitry. Use Value: Delivers 100mA peak current for HART burst transmission while maintaining <1.5mA total loop draw; ±1.75% output accuracy ensures ADC reference stability. |
| High-Voltage LDO Replacement | Battery-Powered Equipment |
Use Scenario: Replacing inefficient 60V-input linear regulators in programmable logic controllers (PLCs) to reduce heat generation and enable smaller enclosures. IC Role / Device Role / Timing Role: Efficient point-of-load regulator converting 24V/48V backplane to 5V for I/O conditioning circuitry. Use Value: >90% peak efficiency vs. <20% for HV LDOs at 24V→5V - cuts power dissipation by >4× and eliminates heatsinks. | Use Scenario: Power management in portable gas detectors or handheld test equipment using primary Li-ion or 9V alkaline batteries. IC Role / Device Role / Timing Role: Main system regulator supporting deep-sleep modes with fast wake-up; RESET pin used for brownout detection. Use Value: 1.2µA shutdown current preserves battery shelf life; programmable EN/UVLO prevents operation below safe battery voltage. |
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 |
|---|---|---|---|
| MAX17552BUB+T | Same pinout and electrical specs, but uses TDFN-CU package (θJA = 63.8°C/W) with improved thermal resistance vs. TDFN (67.3°C/W). | Preferred for higher ambient temperature or higher continuous load scenarios where thermal headroom is constrained. | Select MAX17552BUB+T when board-level thermal management is marginal and junction temperature must stay below 150°C under full 100mA load. |
| LM5165QDGSRQ1 | Automotive-grade (AEC-Q100), wider 3V–65V input, 150mA output, but higher 25µA no-load IQ and no HICCUP protection (uses cycle-by-cycle limit). | Targeted at automotive body electronics; lacks industrial temp range guarantee and RESET pin functionality. | Choose LM5165QDGSRQ1 only if AEC-Q100 qualification is mandatory and the application requires >100mA or extended low-VIN capability below 4V. |
Compared with MAX17552BUB+T, the MAX17552AUB+T offers slightly lower thermal performance but identical functional behavior and qualification; versus LM5165QDGSRQ1, it delivers tighter industrial temperature assurance, lower quiescent current, and integrated power-good signaling-making it optimal for non-automotive industrial edge nodes.
Availability
MAX17552AUB+T is available at Aetrix Electronics and suitable for industrial sensors and process control, 4–20mA loop-powered devices, and high-voltage LDO replacement applications requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX17552AUB+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX17552AUB+T belongs to the Himalaya power portfolio, designed specifically for ultra-small, high-efficiency DC-DC conversion in harsh industrial environments-emphasizing wide input range, low IQ, and robust protection features.
FAQ
What is the maximum input voltage rating for the MAX17552AUB+T?
The MAX17552AUB+T has an absolute maximum input voltage rating of +70V on the IN pin, with recommended continuous operation from 4V to 60V. This 60V upper limit ensures reliable performance in industrial 48V systems and accommodates transient surges common in factory automation and building control wiring.
Does the MAX17552AUB+T support external clock synchronization?
Yes, the MAX17552AUB+T supports external clock synchronization via the RT/SYNC pin. An AC-coupled external clock signal (1.1× fSW max) can be applied to align switching edges across multiple converters-reducing beat frequencies and easing EMI filter design in multi-rail power systems.
How does the HICCUP overload protection in the MAX17552AUB+T differ from standard current limiting?
The MAX17552AUB+T implements HICCUP-mode overload protection with a 51ms timeout, where the device shuts down, cools, then attempts automatic restart. This contrasts with cycle-by-cycle peak-current limiting (used in MAX17552), which continuously limits peak inductor current but sustains thermal stress-making HICCUP safer for sustained shorts in sealed enclosures.
Can the MAX17552AUB+T operate with a prebiased output during startup?
Yes, the MAX17552AUB+T features monotonic startup into prebiased outputs. When enabled, it prevents reverse current flow by controlling gate drive sequencing-ensuring safe power-up in hot-swap modules, redundant power supplies, and field-replaceable sensor cartridges where the output may already be biased.
What is the function of the VOUT pin on the MAX17552AUB+T?
The VOUT pin on the MAX17552AUB+T provides external bias to the internal LDO regulator. For 3.3V–5V outputs, it connects to the output capacitor via a 22.1Ω resistor to improve light-load efficiency and transient response; for outputs outside that range, it connects directly to GND-enabling flexible configuration without additional components.
MAX17552AUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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):
- 4V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 54V
- Current - Output:
- 100mA
- Frequency - Switching:
- 100kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX17552AUB+T FAQ
1.How can I place an order for MAX17552AUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17552AUB+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 MAX17552AUB+T reliable?
The price and inventory of MAX17552AUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17552AUB+T is usually 5 days.
3.What payment methods are accepted for MAX17552AUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17552AUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17552AUB+T?
MAX17552AUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17552AUB+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 MAX17552AUB+T?
For technical support, including MAX17552AUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17552AUB+T requirements.
6.How does Aetrix verify that MAX17552AUB+T is sourced from the original manufacturer or authorized distributors?
All MAX17552AUB+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 MAX17552AUB+T meets industry standards.
7.What is the process for return or replacement of MAX17552AUB+T?
All MAX17552AUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17552AUB+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 MAX17552AUB+T part is unused and in its original packaging.
Return procedure for MAX17552AUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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