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Analog Devices Inc./Maxim Integrated MAX17552ATB+T
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- Part No.:
- MAX17552ATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17552ATB+T.pdf
- Description:
- IC REG BUCK ADJ 100MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,717
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Product details
Overview
The MAX17552ATB+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, 22µA no-load supply current in PFM mode, and operates in a compact 10-pin TDFN (3mm × 2mm) package.
For engineers reviewing the MAX17552ATB+T datasheet, MAX17552ATB+T pinout, MAX17552ATB+T application, or MAX17552ATB+T equivalent, key selection considerations include its ultra-low quiescent current for battery-powered sensors, wide input range for industrial 24V/48V rails, PFM/PWM mode configurability for light-load efficiency vs. EMI control, and built-in RESET monitoring for system-level power sequencing.
Technical Context
The MAX17552ATB+T implements a peak-current-mode control architecture with internal slope compensation and an error amplifier comparing FB voltage to 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), enabling dynamic trade-offs between EMI predictability and light-load efficiency.
It integrates protection features including cycle-by-cycle peak-current limiting (210mA typ), thermal shutdown at +160°C with 20°C hysteresis, monotonic startup into prebiased outputs, and open-drain RESET with 95% rising/92% falling thresholds. The EN/UVLO pin supports programmable turn-on at 1.25V (rising) with 100nA leakage, and RT/SYNC enables external clock synchronization up to 2.2MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - supports wide industrial and automotive supply rails without pre-regulation. |
| Output Current Capability | Up to 100mA - sufficient for powering microcontrollers, sensors, and analog front-ends in space-constrained systems. |
| No-Load Supply Current | 22µA in PFM mode - extends battery life in always-on IoT sensor nodes and remote transmitters. |
| Feedback Regulation Accuracy | ±1.75% over –40°C to +125°C - ensures stable reference for precision analog circuitry across harsh environments. |
| Switching Frequency Range | 100kHz to 2.2MHz - allows optimization of inductor size (higher fSW → smaller L) and EMI filtering requirements. |
| Peak Current Limit | 210mA (typ) - protects internal MOSFETs and external inductor during short-circuit or overload conditions. |
| RESET Threshold Accuracy | 95% rising / 92% falling of VFB - provides reliable power-good signaling for microcontroller reset management. |
Pinout & Package
MAX17552ATB+T is housed in a 10-pin TDFN package (3mm × 2mm, exposed pad), optimized for thermal performance on four-layer PCBs (θJA = 67.3°C/W). Pin functions are validated per Analog Devices' official pin description and block diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Power Input | Bypassed with 1µF X7R ceramic; accepts 4V–60V unregulated input for direct connection to industrial bus rails. |
| EN/UVLO (Pin 2) | Enable & UV Detection | Active-high logic input; threshold 1.25V rising enables soft-start; resistor divider sets custom UVLO trip point. |
| RT/SYNC (Pin 3) | Oscillator Timing / Clock Sync | Resistor-to-GND sets fSW (100kHz–2.2MHz); AC-coupled external clock synchronizes switching to reduce EMI peaks. |
| SS (Pin 4) | Soft-Start Control | Capacitor-to-GND programs ramp time (default 5.1ms); prevents inrush current into downstream capacitors. |
| FB (Pin 5) | Feedback Input | Connects to resistor divider from VOUT; regulates output to 0.8V reference with ±1.75% accuracy over temperature. |
| VOUT (Pin 6) | External Bias Supply | Connected to output capacitor via 22.1Ω resistor for 3.3V–5V outputs; decoupled with 0.22µF for internal LDO stability. |
| RESET (Pin 7) | Open-Drain Power-Good | Pulls low when FB < 92% of setpoint; releases after 2ms delay when FB > 95% - enables sequenced system boot. |
| MODE (Pin 8) | PFM/PWM Selection | Unconnected = automatic PFM at light loads; grounded = forced PWM for fixed-frequency operation and EMI control. |
| GND (Pin 9) | Power Ground | Primary ground return; exposed pad (EP) must be soldered to GND plane for thermal and electrical integrity. |
| LX (Pin 10) | Switch Node | Connects to inductor switch node; high-impedance in shutdown; drives internal high-side pMOS and low-side nMOS. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | On-chip 2.7Ω high-side pMOS and 1.4Ω low-side nMOS eliminate external Schottky diode and simplify layout. |
| Programmable Soft-Start | 5.1ms default or user-defined via SS capacitor - prevents output overshoot and inrush stress on load capacitance. |
| Ultra-Low Quiescent Current | 22µA in PFM mode - enables multi-year battery operation in wireless sensor nodes and energy-harvesting systems. |
| CISPR 32 Class B Compliance | Meets conducted/radiated emissions limits without additional shielding - reduces system-level EMI design effort. |
| Monotonic Startup into Prebiased Output | Guarantees controlled ramp-up even when output is precharged - critical for hot-swap and redundant power applications. |
| Internal Compensation | Eliminates external compensation components - reduces BOM count and design validation time for standard configurations. |
Applications
| Industrial Sensors and Process Control | 4mA–20mA Current-Loop Powered Sensors |
|---|---|
Use Scenario: Powering loop-powered temperature, pressure, or flow transmitters in hazardous-area field devices. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24V loop supply to stable 3.3V/5V for sensor signal conditioning and ADC. Use Value: 60V input rating tolerates line surges; 22µA no-load current minimizes loop burden; RESET ensures clean MCU initialization. |
Use Scenario: Providing regulated bias to analog front-end ICs within 4–20mA transmitter modules. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering precise 3.3V from variable loop voltage (12–45V). Use Value: ±1.75% output accuracy maintains ADC reference stability; PFM mode sustains operation down to 4mA loop current. |
| High-Voltage LDO Replacement | Battery-Powered Equipment |
Use Scenario: Replacing inefficient linear regulators in 24V/48V industrial control cabinets where heat dissipation is constrained. IC Role / Device Role / Timing Role: Efficient buck converter replacing 78L05-style LDOs to reduce thermal load and improve system efficiency. Use Value: >90% peak efficiency vs. ~20% for LDO at 24V→5V; 100mA output supports multiple peripherals without derating. |
Use Scenario: Powering low-duty-cycle IoT edge nodes powered by LiSOCl₂ or alkaline primary cells. IC Role / Device Role / Timing Role: Primary system regulator enabling long shelf life and deep sleep modes via ultra-low IQ. Use Value: 22µA PFM IQ extends 10-year battery life targets; 1.2µA shutdown current eliminates leakage paths during storage. |
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 |
|---|---|---|---|
| MAX17552TATA+ | Same die, 10-pin µMAX (3mm × 3mm) package - larger footprint, higher θJA (113.1°C/W), lower power dissipation limit (707mW). | Preferred where µMAX land pattern is already established; less suitable for ultra-dense layouts or high-ambient-temperature enclosures. | Select MAX17552TATA+ only if board space permits larger package and thermal margin is adequate. |
| LM5165QDGSRQ1 | Automotive-grade (AEC-Q100), 65V input, 150mA output, 17µA IQ, but requires external MOSFETs and compensation components. | Required for automotive under-hood applications; adds design complexity and BOM cost versus MAX17552ATB+T's fully integrated solution. | Choose LM5165QDGSRQ1 only when AEC-Q100 qualification is mandatory and external FET integration is acceptable. |
Compared with MAX17552TATA+, the MAX17552ATB+T offers superior thermal performance and smaller PCB area; compared with LM5165QDGSRQ1, it delivers faster time-to-market with no external power stage design, though lacks automotive qualification.
Availability
MAX17552ATB+T is available at Aetrix Electronics and suitable for industrial sensors and process control, 4–20mA loop-powered transmitters, and battery-powered IoT edge devices requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX17552ATB+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and consumer markets.
The MAX17552ATB+T belongs to the Himalaya power portfolio, designed specifically for compact, high-efficiency, wide-input-voltage DC-DC conversion in space- and thermally-constrained industrial and sensor applications.
FAQ
What is the maximum output current capability of the MAX17552ATB+T?
The MAX17552ATB+T delivers up to 100mA of continuous output current across its full input voltage range (4V–60V) and output voltage range (0.8V–0.9×VIN). This rating is validated under thermal constraints of its 3mm × 2mm TDFN package with proper PCB copper area and airflow. Peak current limit is 210mA (typ), providing headroom for transient loads without triggering hiccup protection.
How does the MODE pin affect efficiency and EMI behavior in the MAX17552ATB+T?
When the MODE pin is left unconnected, the MAX17552ATB+T operates in PFM mode, skipping pulses at light loads to achieve 22µA no-load supply current and >85% efficiency at 1mA load. When grounded, it forces constant-frequency PWM operation - improving EMI predictability and reducing spectral spreading but increasing light-load IQ to ~245µA. The choice directly impacts battery life and EMC compliance strategy.
Can the MAX17552ATB+T be synchronized to an external clock source?
Yes, the MAX17552ATB+T supports external clock synchronization via the RT/SYNC pin. An AC-coupled clock signal (with minimum off-time ≥40ns and rising threshold of 1.22V) can lock the internal oscillator to frequencies up to 2.2MHz. This feature enables deterministic switching alignment across multiple converters to suppress beat frequencies and simplify EMI filter design in multi-rail systems.
What is the purpose of the VOUT pin on the MAX17552ATB+T, and how should it be connected?
The VOUT pin on the MAX17552ATB+T supplies bias to the internal LDO regulator that powers control circuitry. For output voltages between 3.3V and 5V, connect VOUT to the output capacitor's positive terminal through a 22.1Ω resistor and decouple to GND with a 0.22µF capacitor. For outputs <3.3V or >5V, connect VOUT directly to GND. Incorrect connection degrades regulation accuracy and may cause startup failure.
Does the MAX17552ATB+T provide output voltage monitoring, and how is it implemented?
Yes, the MAX17552ATB+T provides output voltage monitoring via the open-drain RESET pin. It asserts low when the FB voltage falls below 92% of its regulated value and releases high-impedance 2ms after FB rises above 95%. This provides a robust, temperature-stable power-good signal for microcontroller reset sequencing, independent of external supervision ICs.
MAX17552ATB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-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):
- 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-TDFN (3x2)
MAX17552ATB+T FAQ
1.How can I place an order for MAX17552ATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17552ATB+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 MAX17552ATB+T reliable?
The price and inventory of MAX17552ATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17552ATB+T is usually 5 days.
3.What payment methods are accepted for MAX17552ATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17552ATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17552ATB+T?
MAX17552ATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17552ATB+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 MAX17552ATB+T?
For technical support, including MAX17552ATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17552ATB+T requirements.
6.How does Aetrix verify that MAX17552ATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17552ATB+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 MAX17552ATB+T meets industry standards.
7.What is the process for return or replacement of MAX17552ATB+T?
All MAX17552ATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17552ATB+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 MAX17552ATB+T part is unused and in its original packaging.
Return procedure for MAX17552ATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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