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Analog Devices Inc./Maxim Integrated MAX17532ATB+T
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- Part No.:
- MAX17532ATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17532ATB+T.pdf
- Description:
- IC REG BUCK ADJ 100MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,535
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Product details
Overview
MAX17532ATB+T from Maxim Integrated is a high-efficiency, synchronous step-down DC-DC converter with integrated MOSFETs, operating from 4V to 42V input and delivering up to 100mA output current. It supports adjustable output voltages from 0.8V to 0.9 × VIN, achieves ±1.75% FB voltage accuracy over –40°C to +125°C, and features peak-current-mode control with selectable PWM or PFM operation. It is used in industrial sensors and battery-powered equipment requiring compact, high-voltage regulation.
For engineers reviewing the MAX17532ATB+T datasheet, MAX17532ATB+T pinout, MAX17532ATB+T application, or MAX17532ATB+T equivalent, key selection considerations include its 22µA no-load quiescent current, 100kHz–2.2MHz adjustable switching frequency with external synchronization, internal compensation for any output voltage, monotonic startup into prebiased loads, and built-in RESET with 2ms delay.
Technical Context
The MAX17532ATB+T implements a peak-current-mode control architecture with an internal error amplifier, slope compensation, and cycle-by-cycle current limiting. Its high-side pMOS and low-side nMOS switches are fully integrated, with RDS(on) of 2.7Ω (high-side) and 1.4Ω (low-side) at 100mA load.
It supports dual operating modes: forced-PWM (MODE = GND) for fixed-frequency operation and PFM (MODE unconnected) for enhanced light-load efficiency via pulse-skipping and hibernation. The device includes programmable EN/UVLO thresholds, internal soft-start, and open-drain RESET monitoring output with 92–95% VFB trip points.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 42V - enables direct regulation from 12V/24V/36V industrial rails without pre-regulation. |
| Output Current | Up to 100mA - sufficient for powering microcontrollers, sensors, and analog front-ends in space-constrained systems. |
| Quiescent Current | 22µA in PFM mode - extends battery life in always-on, low-duty-cycle applications like remote sensors. |
| Switching Frequency | 100kHz to 2.2MHz, adjustable via RT/SYNC resistor or external clock - allows EMI optimization and inductor size reduction. |
| Feedback Accuracy | ±1.75% over –40°C to +125°C - ensures stable output regulation across harsh industrial temperature ranges. |
| Shutdown Current | 1.2µA - minimizes system standby power loss when disabled via EN/UVLO. |
| Efficiency Peak | >90% - achieved with synchronous rectification and all-ceramic capacitor support, reducing thermal stress. |
Pinout & Package
MAX17532ATB+T is packaged in a 10-pin TDFN (3mm × 2mm) with exposed pad (EP), RoHS-compliant and optimized for thermal performance on four-layer PCBs (θJA = 67.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply rail | Bypassed with 1µF X7R ceramic; accepts 4V–42V; powers internal LDO and gate drivers. |
| EN/UVLO | Enable and input UVLO control | Active-high logic; threshold programmable via resistor divider; pulls IN current to <1.2µA in shutdown. |
| RT/SYNC | Oscillator timing and sync input | Resistor sets fSW (100kHz–2.2MHz); accepts external clock for system-level timing alignment in PWM mode. |
| SS | Soft-start control | Capacitor sets ramp time (default 5.1ms); ensures monotonic VOUT rise even into prebiased loads. |
| FB | Output voltage feedback | Monitors resistive divider; regulates VOUT to 0.8V reference with ±1.75% accuracy across temperature. |
| VOUT | External bias supply input | Connects to output rail (3.3V–5V) via RC network to reduce IN current and improve efficiency. |
| RESET | Open-drain power-good monitor | Pulls low if VFB < 92%; releases after 2ms delay when VFB > 95% - enables system reset sequencing. |
| MODE | PFM/PWM selection | Unconnected = auto PFM at light loads; GND = forced PWM - selectable per system noise/efficiency trade-off. |
| GND | Power and signal ground | Single-point connection point; EP must be soldered to GND plane for thermal and electrical integrity. |
| LX | Switch node | Drives external inductor; high-impedance in shutdown; requires low-inductance layout to minimize ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side pMOS and low-side nMOS | Eliminates external FETs and reduces BOM count; RDS(on) values ensure <100mA continuous delivery with minimal conduction loss. |
| Internal compensation network | Enables stable loop response across full output voltage range (0.8V–0.9×VIN) without external compensation components. |
| All-ceramic capacitor support | Allows compact, low-profile designs using only X7R MLCCs for CIN, COUT, and soft-start - no electrolytics required. |
| Programmable EN/UVLO threshold | Configurable turn-on/off voltage via resistor divider on EN/UVLO pin - supports brown-out protection and sequenced power-up. |
| Hiccup-mode overload protection | Enters safe, low-power restart cycle during sustained short-circuit - prevents thermal runaway without latch-off. |
Applications
| Industrial Sensors and Process Control | High-Voltage LDO Replacement |
|---|---|
|
Use Scenario: Powering 4–20mA loop transmitters and isolated analog sensor interfaces in factory automation cabinets. IC Role / Device Role / Timing Role: Primary 3.3V/5V point-of-load regulator converting 24V field bus directly, replacing discrete buck + LDO solutions. Use Value: 22µA quiescent current enables ultra-low standby power; ±1.75% regulation ensures ADC reference stability over temperature. |
Use Scenario: Replacing inefficient 78L05-style linear regulators in 12V–36V industrial modules where heat dissipation is constrained. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter delivering regulated 5V/100mA with no heatsink required. Use Value: >90% peak efficiency eliminates thermal derating; 42V max input withstands load-dump transients in automotive-adjacent systems. |
| Battery-Powered Equipment | HVAC and Building Control |
|
Use Scenario: Long-life wireless sensor nodes powered by two LiSOCl₂ cells (6.8V–7.2V) or three alkaline cells (4.5V–4.8V). IC Role / Device Role / Timing Role: Primary DC-DC regulator enabling deep-sleep MCU operation with 1.2µA shutdown current. Use Value: PFM mode delivers >85% efficiency at 100µA load; monotonic startup prevents reverse current into precharged supercaps. |
Use Scenario: Powering BACnet MS/TP controllers, damper actuators, and CO₂ sensors in commercial HVAC ducts (-40°C to +85°C ambient). IC Role / Device Role / Timing Role: Robust 24V-to-3.3V conversion with built-in RESET, thermal shutdown, and wide-temp operation. Use Value: –40°C to +125°C ambient rating ensures reliability in unconditioned mechanical rooms; hiccup protection handles motor stall faults. |
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 |
|---|---|---|---|
| LMR36520RNXR | 65V input, 200mA output, 26µA IQ, fixed 5V/3.3V options only - no adjustable VOUT or PFM mode. | Suitable for higher-input-voltage systems but lacks flexibility for custom output voltages and light-load optimization. | Select when 65V input tolerance is mandatory and fixed outputs suffice; avoid when adjustable VOUT or sub-100µA IQ is required. |
| TPS561201DDCR | 17V input, 1.2A output, 95µA IQ, integrated compensation - wider current range but lower voltage rating and higher quiescent current. | Better for high-current, low-voltage applications (e.g., FPGA I/O rails), not for 42V industrial inputs or µA-level standby. | Choose for cost-sensitive, high-current 12V systems; reject for 24V+/battery-backed designs needing ultra-low IQ or wide VIN. |
Compared with LMR36520RNXR and TPS561201DDCR, MAX17532ATB+T uniquely balances 42V input capability, 100mA output, 22µA PFM IQ, and fully adjustable output - making it optimal for space- and power-constrained industrial edge nodes where voltage flexibility and efficiency at microamp loads are critical.
Availability
MAX17532ATB+T is available at Aetrix Electronics and suitable for industrial sensors and process control, battery-powered equipment, and HVAC and building control systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX17532ATB+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 markets.
The MAX17532ATB+T belongs to Maxim's ultra-small, high-efficiency DC-DC converter family targeting space-constrained industrial and battery-operated systems requiring wide-input-voltage regulation with minimal external components.
FAQ
What is the maximum input voltage supported by the MAX17532ATB+T?
The MAX17532ATB+T supports a maximum input voltage of 42V, with absolute maximum rating up to 48V on the IN pin. This enables direct regulation from common industrial 24V and 36V rails, including transient-tolerant operation in environments with load-dump events. Operation above 42V violates recommended conditions and may impact reliability.
Does the MAX17532ATB+T require external compensation components?
No, the MAX17532ATB+T features internal compensation optimized for all output voltages from 0.8V to 0.9 × VIN. This eliminates the need for external Type-II or Type-III compensation networks, simplifying design and reducing board area - a key advantage confirmed in the device's Electrical Characteristics and Block Diagram sections.
How does the MODE pin affect efficiency and noise performance of the MAX17532ATB+T?
When MODE is unconnected, MAX17532ATB+T operates in PFM mode at light loads, skipping pulses to achieve 22µA quiescent current and >85% efficiency at 100µA. When MODE is grounded, it forces fixed-frequency PWM operation - improving EMI predictability but increasing light-load IQ to ~245µA. The choice directly trades efficiency versus spectral content.
Can the MAX17532ATB+T start up safely into a prebiased output voltage?
Yes, the MAX17532ATB+T supports monotonic startup into prebiased outputs. During power-up, both high-side and low-side FETs remain off until the first PWM pulse is commanded, preventing reverse current flow. This behavior is explicitly verified in the "Startup Into a Prebiased Output" section and typical waveforms (Figures 35–38).
What is the function of the VOUT pin on the MAX17532ATB+T, and how should it be connected?
The VOUT pin on MAX17532ATB+T provides external bias for internal circuitry. For 3.3V–5V outputs, connect it to the output rail via a 22.1Ω resistor and 0.22µF capacitor to reduce IN current and improve efficiency. For outputs <3.3V or >5V, tie VOUT directly to GND - misconnection risks exceeding the –0.3V absolute minimum rating under fault conditions.
MAX17532ATB+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):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 37.8V
- 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 (3x2)
MAX17532ATB+T FAQ
1.How can I place an order for MAX17532ATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17532ATB+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 MAX17532ATB+T reliable?
The price and inventory of MAX17532ATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17532ATB+T is usually 5 days.
3.What payment methods are accepted for MAX17532ATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17532ATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17532ATB+T?
MAX17532ATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17532ATB+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 MAX17532ATB+T?
For technical support, including MAX17532ATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17532ATB+T requirements.
6.How does Aetrix verify that MAX17532ATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17532ATB+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 MAX17532ATB+T meets industry standards.
7.What is the process for return or replacement of MAX17532ATB+T?
All MAX17532ATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17532ATB+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 MAX17532ATB+T part is unused and in its original packaging.
Return procedure for MAX17532ATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX17532ATB+T Tags
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MC34063EBD-TR
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