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Analog Devices Inc./Maxim Integrated MAX17552BATB+
- Part No.:
- MAX17552BATB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17552BATB+.pdf
- Description:
- IC REG BUCK ADJ 100MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,159
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Product details
Overview
The MAX17552BATB+ 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 output current at 0.8V–0.9×VIN. It features ±1.75% output voltage accuracy over –40°C to +125°C, 22µA no-load supply current in PFM mode, and peak efficiency >90%. It is used in industrial sensors and 4–20mA loop-powered systems requiring ultra-small, high-efficiency regulation.
For engineers reviewing the MAX17552BATB+ datasheet, MAX17552BATB+ pinout, MAX17552BATB+ application, or MAX17552BATB+ equivalent, key selection criteria include its 10-pin TDFN (3mm × 2mm) package, programmable 100kHz–2.2MHz switching frequency, MODE-selectable PFM/PWM operation, EN/UVLO threshold programmability, and open-drain RESET for output monitoring.
Technical Context
This device employs a peak-current-mode control architecture with internal slope compensation and an error amplifier referenced to a 0.8V internal feedback threshold. Its MODE pin selects between forced-PWM (constant frequency, negative inductor current allowed) and PFM (pulse-skipping, zero-negative-current, optimized for light-load efficiency).
The IC integrates all power switches and compensation, supports external clock synchronization via RT/SYNC, and implements monotonic startup into prebiased outputs. Overload protection differs by variant: MAX17552 uses cycle-by-cycle peak-current limiting, while MAX17552A/B use hiccup-mode-though MAX17552BATB+ is confirmed as the MAX17552 variant per package code T1032N+1 and datasheet revision history.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 60V - enables direct regulation from unregulated industrial rails, battery stacks, or PoE-derived supplies without pre-regulation. |
| Output Current | Up to 100mA - sufficient for powering microcontrollers, analog front-ends, and isolated interface ICs in space-constrained nodes. |
| No-Load Supply Current | 22µA in PFM mode - minimizes standby power in always-on sensor nodes and battery-backed systems. |
| Feedback Accuracy | ±1.75% over –40°C to +125°C - ensures stable output under wide ambient and junction temperature swings in industrial environments. |
| Switching Frequency Range | 100kHz to 2.2MHz - allows optimization of inductor size vs. efficiency; supports external synchronization for EMI reduction. |
| Soft-Start Time | Fixed 5.1ms (SS unconnected) - prevents inrush current into downstream capacitive loads during power-up. |
| Shutdown Current | 1.2µA typical - enables deep sleep states in energy-harvesting or low-power IoT endpoints. |
Pinout & Package
MAX17552BATB+ is housed in a 10-pin TDFN package (3mm × 2mm, outline 21-0429, land pattern 90-0082), with exposed pad (EP) connected to GND for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Power Input | Bypassed with 1µF X7R ceramic; accepts 4V–60V unregulated input; feeds internal high-side switch and bias LDO. |
| 2 EN/UVLO | Enable & UV Detection | Active-high logic input; rising threshold 1.25V typ; resistor divider sets turn-on VIN level; supports true shutdown below 0.7V. |
| 3 RT/SYNC | Oscillator Timing / Sync Input | Connect resistor to GND for 100kHz–2.2MHz fSW; AC-coupled external clock accepted for EMI-aligned switching. |
| 4 SS | Soft-Start Control | Capacitor-to-GND sets ramp time; unconnected = fixed 5.1ms internal soft-start; prevents output overshoot and inrush. |
| 5 FB | Feedback Input | Monitors output via resistor divider; regulates VOUT to 0.8V reference; ±1.75% accuracy maintained across full temp range. |
| 6 VOUT | External Bias Input | Connected to output capacitor via 22.1Ω resistor for 3.3V–5V outputs; improves transient response and stability. |
| 7 RESET | Open-Drain Output Monitor | Pulls low when FB falls below 92% of setpoint; releases after 2ms delay when FB rises above 95%; requires external pull-up. |
| 8 MODE | Control Mode Selection | Unconnected = PFM (light-load efficiency); GND = forced-PWM (fixed frequency, EMI-controlled); no external pull required. |
| 9 GND | Power & Signal Ground | Single-point ground connection point; EP must be soldered to same ground plane for thermal performance and noise immunity. |
| 10 LX | Switch Node | Connects to inductor switch node; high-impedance in shutdown; handles ±1.6A RMS current; requires tight layout to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | Eliminates external Schottky diode and reduces BOM count; high-side pMOS (2.7Ω typ) and low-side nMOS (1.4Ω typ) enable >90% peak efficiency. |
| Programmable Switching Frequency | 100kHz–2.2MHz via RT resistor or external SYNC clock - enables trade-off between inductor size, efficiency, and conducted/radiated EMI compliance. |
| PFM/PWM Mode Flexibility | On-the-fly MODE pin selection allows dynamic adaptation: PFM for battery life extension, PWM for deterministic timing in noise-sensitive systems. |
| Prebias Startup Capability | Monotonic start-up into precharged output avoids reverse current flow - critical for hot-swap and redundant power applications. |
| CISPR 32 Class B Compliance | Meets conducted and radiated emissions limits without added filtering - reduces design iteration and board area for industrial EMC certification. |
Applications
| Industrial Sensors and Process Control | 4–20mA Current-Loop Powered Sensors |
|---|---|
Use Scenario: Powering analog sensor signal conditioning circuits in factory-floor PLC I/O modules where input rail varies from 12V to 48V DC. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting unregulated field bus voltage to stable 3.3V/5V for op-amps, ADCs, and isolators. Use Value: 60V max input withstands transients on industrial buses; ±1.75% accuracy maintains sensor measurement linearity across temperature. | Use Scenario: Supplying regulated bias to loop-powered pressure/temperature transmitters drawing <100mA from 4–20mA loop. IC Role / Device Role / Timing Role: High-voltage buck converter deriving local 3.3V rail from loop's 12–42V compliance voltage. Use Value: 22µA no-load IQ extends loop lifetime; PFM mode sustains efficiency at µA-level quiescent loads typical in smart transmitters. |
| High-Voltage LDO Replacement | Battery-Powered Equipment |
Use Scenario: Replacing inefficient 60V-input linear regulators in HVAC controllers to reduce heat and improve system efficiency. IC Role / Device Role / Timing Role: Efficient step-down regulator replacing dropout-limited LDOs in 24V/48V embedded control units. Use Value: >90% peak efficiency eliminates heatsink requirement; 100mA output supports MCU + peripherals without thermal derating. | Use Scenario: Power management in portable test equipment powered by 12V–36V Li-ion packs or 9V alkaline stacks. IC Role / Device Role / Timing Role: Main system regulator delivering 3.3V to MCU, display, and wireless SoC with minimal standby drain. Use Value: 1.2µA shutdown current preserves battery shelf life; 5.1ms soft-start prevents brown-out during cold-start from depleted cells. |
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 |
|---|---|---|---|
| MAX17552AATB+ | Hiccup-mode overload protection (vs. cycle-by-cycle limit); different MODE pin internal pullup (123kΩ vs. 235kΩ); identical pinout and package. | Better suited for applications with sustained short-circuit risk where thermal stress on inductor/FETs must be minimized. | Select MAX17552AATB+ if hiccup protection is required; verify MODE pin bias compatibility in existing designs. |
| LM5165QDGSRQ1 | Automotive-grade (AEC-Q100); wider 3V–65V input; 150mA output; 3.5µA IQ; no integrated VOUT bias path or RESET pin. | Targeted at automotive body electronics; lacks RESET monitoring and external bias capability needed for precision analog rails. | Choose LM5165QDGSRQ1 only for automotive qualification needs; MAX17552BATB+ offers superior analog monitoring features for industrial sensing. |
Compared with MAX17552AATB+, the MAX17552BATB+ provides faster overload response and higher light-load efficiency due to cycle-by-cycle current limiting and optimized PFM behavior; compared with LM5165QDGSRQ1, it delivers tighter output monitoring (RESET), better thermal performance in compact layouts, and simplified biasing for 3.3V/5V outputs.
Availability
MAX17552BATB+ 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 RoHS-compliant sourcing.
Supply support for MAX17552BATB+ 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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX17552 series belongs to the Himalaya power portfolio, designed specifically for ultra-compact, high-efficiency DC-DC conversion in harsh industrial environments where wide input range, thermal robustness, and EMI compliance are mandatory.
FAQ
What is the maximum input voltage rating for the MAX17552BATB+?
The MAX17552BATB+ has an absolute maximum input voltage rating of +70V on the IN pin, but its specified operational input range is 4V to 60V. Operation within the 4V–60V range ensures guaranteed performance across temperature and load conditions per the datasheet specifications. Exceeding 60V may compromise regulation accuracy or reliability, even if below the 70V absolute maximum stress limit.
Does the MAX17552BATB+ support external clock synchronization?
Yes, the MAX17552BATB+ supports external clock synchronization via the RT/SYNC pin. An AC-coupled external clock signal can be applied to synchronize the internal oscillator, enabling deterministic switching timing for EMI reduction in noise-sensitive systems. The SYNC input accepts frequencies up to 2.2MHz and requires ≥1 cycle to lock, with a minimum off-time of 40ns between pulses.
What is the function of the VOUT pin on the MAX17552BATB+?
The VOUT pin on the MAX17552BATB+ provides external bias to the internal control circuitry. For output voltages between 3.3V and 5V, it must be connected to the output capacitor's positive terminal through a 22.1Ω resistor and decoupled with a 0.22µF capacitor to GND. This configuration improves transient response and loop stability. For outputs outside that range, VOUT is connected directly to GND.
How does the MODE pin affect efficiency in the MAX17552BATB+?
The MODE pin on the MAX17552BATB+ selects between PFM and forced-PWM operation. When unconnected, the device enters PFM mode at light loads, disabling negative inductor current and skipping pulses to achieve 22µA no-load supply current and >85% efficiency at 1mA. When grounded, it operates in constant-frequency PWM mode, maintaining fixed switching frequency but increasing no-load IQ to ~245µA - optimal for EMI-sensitive applications despite lower light-load efficiency.
Is the MAX17552BATB+ pin-compatible with other variants in the MAX17552 family?
Yes, the MAX17552BATB+ is fully pin-compatible with MAX17552AATB+ and MAX17552BBTB+ - all share identical 10-pin TDFN (3mm × 2mm) footprints and pin functions. Differences lie in internal protection behavior (cycle-by-cycle vs. hiccup overload), MODE pin pullup resistance, and minor parameter tolerances; no PCB changes are required when substituting within the same package variant.
MAX17552BATB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN-EP (2x3)
MAX17552BATB+ FAQ
1.How can I place an order for MAX17552BATB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17552BATB+ 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 MAX17552BATB+ reliable?
The price and inventory of MAX17552BATB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17552BATB+ is usually 5 days.
3.What payment methods are accepted for MAX17552BATB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17552BATB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17552BATB+?
MAX17552BATB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17552BATB+ 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 MAX17552BATB+?
For technical support, including MAX17552BATB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17552BATB+ requirements.
6.How does Aetrix verify that MAX17552BATB+ is sourced from the original manufacturer or authorized distributors?
All MAX17552BATB+ 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 MAX17552BATB+ meets industry standards.
7.What is the process for return or replacement of MAX17552BATB+?
All MAX17552BATB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17552BATB+, 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 MAX17552BATB+ part is unused and in its original packaging.
Return procedure for MAX17552BATB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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