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Analog Devices Inc./Maxim Integrated MAX17530AUB+
- Part No.:
- MAX17530AUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX17530AUB+.pdf
- Description:
- IC REG BUCK ADJ 25MA 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:342
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Product details
Overview
MAX17530AUB+ from Maxim Integrated is a high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs, operating from 4V to 42V input and delivering up to 25mA output current. It supports adjustable output voltages from 0.8V to 0.9 × VIN, features ±1.75% FB regulation accuracy over –40°C to +125°C, and achieves >90% peak efficiency in PWM mode. It is used in industrial sensors and battery-powered equipment requiring ultra-small footprint and low quiescent current.
For engineers reviewing the MAX17530AUB+ datasheet, MAX17530AUB+ pinout, MAX17530AUB+ application, or MAX17530AUB+ equivalent, key selection considerations include its 22µA no-load supply current in PFM mode, 100kHz–2.2MHz programmable switching frequency via RT/SYNC resistor, monotonic startup into prebiased loads, and integrated peak-current-mode control architecture with internal compensation.
Technical Context
The MAX17530AUB+ employs peak-current-mode control with internal slope compensation and an error amplifier comparing FB voltage to a 0.8V reference. Its dual-mode operation-PWM (forced, constant-frequency) when MODE = GND, and PFM (pulse-skipping, light-load optimized) when MODE is unconnected-enables adaptive efficiency across load ranges.
It integrates high-side pMOS (RDS(on) = 3.2Ω typ) and low-side nMOS (RDS(on) = 1.6Ω typ) switches, supports external synchronization at up to 2.2MHz, and includes built-in protections: peak current limit (72mA typ), thermal shutdown (160°C), and output voltage monitoring via open-drain RESET with 92–95% hysteresis thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 42V - enables direct replacement of high-voltage LDOs in industrial and automotive-supply rails without pre-regulation. |
| Output Current Capability | Up to 25mA - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained systems. |
| Feedback Accuracy | ±1.75% over –40°C to +125°C - ensures stable output regulation across full industrial temperature range without calibration. |
| No-Load Supply Current | 22µA in PFM mode - minimizes standby power in battery-backed or energy-harvesting applications. |
| Switching Frequency Range | 100kHz to 2.2MHz, adjustable via RT resistor or external SYNC - allows EMI optimization and inductor size reduction. |
| Quiescent Current in Shutdown | 1.2µA max - enables long-term storage or deep-sleep states without significant battery drain. |
| Operating Junction Temp | –40°C to +150°C - supports reliable operation in harsh environments such as HVAC and motor control enclosures. |
Pinout & Package
MAX17530AUB+ is packaged in a 10-pin µMAX® (3mm × 3mm) package with exposed pad (EP) connected to GND. The µMAX package offers compact layout, improved thermal performance vs. TDFN in low-power applications, and compatibility with standard reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply rail | Accepts 4V–42V; requires local 1µF X7R ceramic bypass capacitor to GND for stability and noise suppression. |
| EN/UVLO | Enable and input undervoltage lockout | Active-high logic; rising threshold 1.25V typ; configurable UVLO hysteresis via external resistor divider. |
| RT/SYNC | Oscillator timing and sync input | Connect resistor to GND for frequency setting (100kHz–2.2MHz); accepts external clock for system-level synchronization in PWM mode. |
| SS | Soft-start control | Internal 5.1ms soft-start if unconnected; external capacitor enables user-defined ramp time and monotonic startup into prebiased outputs. |
| FB | Output voltage feedback | Compares divided VOUT to 0.8V internal reference; ±1.75% accuracy enables precise regulation without trimming. |
| VOUT | External bias supply input | Connected to output node via 22.1Ω + 0.22µF RC network for 3.3V–5V outputs; improves efficiency by powering internal circuitry from regulated rail. |
| RESET | Open-drain output voltage monitor | Pulls low when FB falls below 92% of setpoint; releases after 2ms delay when FB rises above 95% - provides reliable power-good signaling. |
| MODE | PFM/PWM mode selection | Unconnected = automatic PFM at light loads; GND = forced PWM for fixed-frequency operation and EMI predictability. |
| GND | Power and signal ground | Single-point connection point for all grounds; EP must be soldered to GND plane for thermal and electrical integrity. |
| LX | Switch node | Drives external inductor; high-impedance during shutdown; requires low-inductance layout to minimize ringing and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated high-side pMOS and low-side nMOS eliminate need for external Schottky diode, reducing BOM count and conduction losses. |
| Internal compensation | Eliminates external compensation components across full output voltage range (0.8V to 0.9×VIN), simplifying design and improving reliability. |
| All-ceramic capacitor support | Enables compact, low-profile designs using only X7R/X5R MLCCs on input and output - no electrolytics or tantalums required. |
| Programmable switching frequency | 100kHz–2.2MHz adjustment via single RT resistor allows trade-off between efficiency, size, and EMI compliance without changing layout. |
| Monotonic startup into prebiased load | Prevents reverse current flow during power-up when output is already biased - critical for hot-swap and multi-rail systems. |
| PFM mode with hibernate | Skips pulses and shuts down internal blocks at light loads, achieving 22µA no-load IQ and extending battery life in intermittent-use devices. |
Applications
| Industrial Sensor Power | High-Voltage LDO Replacement |
|---|---|
|
Use Scenario: Powering 4–20mA loop-powered temperature and pressure transmitters in factory automation systems. IC Role / Device Role: Primary 3.3V or 5V regulator converting 24V field bus to low-voltage sensor and ADC supply. Use Value: 42V max input withstands load-dump transients; 22µA PFM IQ extends loop lifetime; ±1.75% FB accuracy ensures sensor measurement integrity. |
Use Scenario: Replacing inefficient 78L05-style LDOs in PLC I/O modules powered from 24V or 36V rails. IC Role / Device Role: High-efficiency buck converter delivering 5V/25mA to isolated digital isolators and level shifters. Use Value: >90% peak efficiency reduces heat buildup in sealed enclosures; 100kHz–2.2MHz frequency tuning avoids noise coupling into analog signal paths. |
| Battery-Powered Remote Monitoring | HVAC Zone Controller Power |
|
Use Scenario: Regulating power for LoRaWAN or NB-IoT nodes powered by 3.6V LiSOCl₂ or 12V primary lithium batteries. IC Role / Device Role: Step-down converter generating stable 3.3V for MCU, RF transceiver, and environmental sensors. Use Value: 1.2µA shutdown current preserves battery shelf life; PFM mode maintains >85% efficiency at 100µA loads; wide VIN accommodates aging battery discharge curves. |
Use Scenario: Providing auxiliary 3.3V/5V supply in smart thermostats and zone dampers powered from 24VAC/DC HVAC distribution. IC Role / Device Role: Compact, thermally robust DC-DC stage converting rectified 24VAC to clean logic supply under variable ambient conditions. Use Value: –40°C to +125°C operating range ensures reliability in attic or outdoor enclosures; RESET output enables brownout detection for firmware-safe shutdown. |
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 |
|---|---|---|---|
| LM5164QDRCRQ1 | Automotive-grade (AEC-Q100), 4–65V input, 300mA output, requires external MOSFETs and compensation. | Higher output current and extended input range; suited for automotive body electronics where higher load capability is needed. | Select LM5164QDRCRQ1 when >25mA output or AEC-Q100 qualification is mandatory; MAX17530AUB+ remains optimal for space- and IQ-constrained industrial sub-100mA rails. |
| TPS562201 | 2.7–17V input, 2A output, integrated FETs, 500kHz fixed frequency, no PFM mode or RESET output. | Targeted at low-voltage consumer/industrial applications; lacks high-VIN capability, thermal grade, and monitoring features. | Choose TPS562201 for cost-sensitive 5V/12V systems with ample board area; MAX17530AUB+ is preferred for 24V+ industrial rails needing precision, low IQ, and RESET functionality. |
Compared with LM5164QDRCRQ1 and TPS562201, the MAX17530AUB+ uniquely balances ultra-low 22µA PFM quiescent current, integrated RESET, –40°C to +125°C operation, and 4V–42V input in a 3mm × 3mm µMAX package - making it the most suitable choice for compact, battery-aware, high-reliability industrial DC-DC conversion.
Availability
MAX17530AUB+ is available at Aetrix Electronics and suitable for industrial sensors and process control, battery-powered equipment, and HVAC and building control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX17530AUB+ 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 MAX17530 belongs to Maxim's high-voltage DC-DC converter product line, engineered specifically for space-constrained industrial systems requiring high efficiency, wide input range, and robust operation across extreme temperatures.
FAQ
What is the maximum input voltage rating for the MAX17530AUB+?
The MAX17530AUB+ has an absolute maximum input voltage rating of 48V on the IN pin, with continuous operation specified from 4V to 42V. This 42V upper limit ensures reliable performance in 24V industrial systems subject to load-dump transients, while the 48V absolute rating provides margin against short-duration overvoltage events.
Does the MAX17530AUB+ support external synchronization of its switching frequency?
Yes, the MAX17530AUB+ supports external synchronization via the RT/SYNC pin, but only when operated in forced-PWM mode (MODE pin grounded). An external clock signal - coupled through a 47pF capacitor, with logic-high >3V and duty cycle 10–70% - can synchronize the internal oscillator up to 2.2MHz, enabling deterministic EMI management in system-level timing domains.
How does the MODE pin affect efficiency and operation of the MAX17530AUB+?
The MODE pin selects between two distinct operating modes: when left unconnected, MAX17530AUB+ enters PFM mode at light loads, skipping pulses and disabling internal blocks to achieve 22µA no-load IQ; when tied to GND, it forces constant-frequency PWM operation across all loads, ensuring predictable EMI and supporting negative inductor current for tighter regulation - at the expense of higher light-load IQ.
What is the function of the VOUT pin on the MAX17530AUB+ and how should it be connected?
The VOUT pin on the MAX17530AUB+ supplies bias power to internal circuitry. For 3.3V–5V output configurations, it must be connected to the output node via a 22.1Ω resistor and 0.22µF capacitor to reduce switching losses and improve efficiency. For outputs <3.3V or >5V, VOUT is connected directly to GND to prevent violation of its –0.3V to 6V absolute maximum rating.
Can the MAX17530AUB+ start up safely into a prebiased output voltage?
Yes, the MAX17530AUB+ supports monotonic startup into a prebiased output. During power-up, both high-side and low-side MOSFETs remain off until the internal reference ramps up, preventing reverse current flow from the precharged output capacitor. This feature eliminates output voltage overshoot and protects downstream circuitry in hot-swap and multi-rail systems.
MAX17530AUB+ 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:
- 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):
- 42V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 37.8V
- Current - Output:
- 25mA
- 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-uMAX/uSOP
MAX17530AUB+ FAQ
1.How can I place an order for MAX17530AUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17530AUB+ 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 MAX17530AUB+ reliable?
The price and inventory of MAX17530AUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17530AUB+ is usually 5 days.
3.What payment methods are accepted for MAX17530AUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17530AUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17530AUB+?
MAX17530AUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17530AUB+ 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 MAX17530AUB+?
For technical support, including MAX17530AUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17530AUB+ requirements.
6.How does Aetrix verify that MAX17530AUB+ is sourced from the original manufacturer or authorized distributors?
All MAX17530AUB+ 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 MAX17530AUB+ meets industry standards.
7.What is the process for return or replacement of MAX17530AUB+?
All MAX17530AUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX17530AUB+, 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 MAX17530AUB+ part is unused and in its original packaging.
Return procedure for MAX17530AUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX17530AUB+ Tags
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