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Analog Devices Inc./Maxim Integrated MAX17530ATB+T
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- Part No.:
- MAX17530ATB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX17530ATB+T.pdf
- Description:
- IC REG BUCK ADJ 25MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX17530ATB+T 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 features ±1.75% feedback voltage accuracy over –40°C to +125°C, 22µA no-load supply current in PFM mode, and adjustable switching frequency from 100kHz to 2.2MHz. It serves as an ultra-small, high-efficiency replacement for high-voltage LDOs in space-constrained industrial sensor modules.
For engineers reviewing the MAX17530ATB+T datasheet, MAX17530ATB+T pinout, MAX17530ATB+T application, or MAX17530ATB+T equivalent, key selection considerations include its wide input range, internal compensation enabling any output voltage from 0.8V to 0.9×VIN, monotonic startup into prebiased loads, peak-current-mode control architecture, and dual PWM/PFM mode operation with programmable EN/UVLO threshold.
Technical Context
The MAX17530ATB+T implements peak-current-mode control with internal slope compensation and an error amplifier comparing FB voltage to a 0.8V reference. Its architecture supports cycle-by-cycle current limiting, programmable soft-start via SS pin, and external synchronization on the RT/SYNC pin - but only when MODE is grounded for forced-PWM operation.
It integrates complementary high-side pMOS (typ. 5.9Ω RDS(on)) and low-side nMOS (typ. 3.0Ω RDS(on)) switches, enabling fully synchronous operation without external diodes. The VOUT pin provides external biasing capability for improved efficiency at 3.3V–5V outputs, while RESET offers open-drain output monitoring with 92%–95% hysteresis relative to regulated FB voltage.
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 25mA - sufficient for powering microcontrollers, sensors, and analog front-ends in low-power systems. |
| Feedback Accuracy | ±1.75% over –40°C to +125°C - ensures stable output voltage across full industrial temperature range. |
| 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 - allows EMI optimization and compact magnetics selection via RT resistor or external sync clock. |
| Quiescent Current in Shutdown | 1.2µA max - supports ultra-low-power system-level sleep states with minimal leakage. |
| Operating Temperature | –40°C to +125°C ambient - qualified for harsh environments including HVAC, process control, and automotive under-hood proximity. |
Pinout & Package
MAX17530ATB+T is packaged in a 10-pin TDFN (3mm × 2mm) with exposed pad, designated by package code T1032N+1. This thermally enhanced package delivers θJA = 67.3°C/W on a four-layer board, supporting reliable operation at full load in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input power rail connection | Bypassed with 1µF X7R ceramic; accepts 4V–42V unregulated input with robust absolute max rating of 48V. |
| EN/UVLO | Enable and input undervoltage lockout input | Active-high logic; rising threshold 1.25V (typ); programmable UVLO via resistor divider for system-level brownout protection. |
| RT/SYNC | Oscillator timing and external sync input | Connect resistor to GND for 100kHz–2.2MHz fSW; accept external clock (1.1×fSW max) only in PWM mode for deterministic timing alignment. |
| SS | Soft-start control | Internal 5.1ms soft-start if left open; external capacitor enables user-defined ramp time for monotonic startup into prebiased outputs. |
| FB | Output voltage feedback node | Compares against 0.8V internal reference; sets output via resistor divider; ±1.75% accuracy ensures tight regulation without trimming. |
| VOUT | External bias supply input | Connected to output capacitor via 22.1Ω resistor + 0.22µF capacitor 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 target; releases after 2ms delay when FB rises above 95% - enables system reset sequencing. |
| MODE | PFM/PWM operation mode select | Ground for fixed-frequency PWM; floating for automatic light-load PFM - no dynamic switching during operation. |
| GND | Power and signal ground reference | Single-point connection point for all grounds; exposed pad (EP) must be soldered to GND plane for thermal and electrical integrity. |
| LX | Switch node connection | Drives external inductor; high-impedance in shutdown; supports ≤0.8A RMS current; requires low-inductance layout for EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side pMOS and low-side nMOS | Eliminates need for external Schottky diode and reduces BOM count; RDS(on) values (5.9Ω / 3.0Ω typ) enable >90% peak efficiency. |
| Internal compensation network | Supports stable operation across full output voltage range (0.8V to 0.9×VIN) without external compensation components. |
| Programmable EN/UVLO threshold | Enables precise input voltage supervision - e.g., disable converter before main system brownout - using simple resistor divider on EN/UVLO. |
| Monotonic startup into prebiased output | Prevents reverse current flow during power-up when output is already biased; critical for hot-swap and redundant power systems. |
| Hiccup-mode overload protection | Enters current-limited restart cycle (51ms timeout) during sustained short-circuit, preventing thermal runaway without latch-off. |
Applications
| Industrial Sensor Node | High-Voltage LDO Replacement |
|---|---|
|
Use Scenario: Powering 4–20mA loop-powered temperature/pressure transmitters with 24V supply rail and <25mA total load. IC Role / Device Role / Timing Role: Primary DC-DC regulator converting 24V input to stable 3.3V or 5V for MCU, ADC, and signal conditioning circuitry. Use Value: Replaces inefficient 24V-to-3.3V LDOs, reducing thermal load by >75% and enabling smaller enclosures without heatsinks. |
Use Scenario: Replacing discrete 36V-input LDOs in building automation controllers requiring 5V for communication ICs. IC Role / Device Role / Timing Role: High-efficiency buck converter delivering regulated 5V at up to 25mA with 22µA quiescent current. Use Value: Achieves >90% efficiency at full load vs. <30% for LDOs, cutting PCB temperature rise and extending system lifetime. |
| Battery-Powered Equipment | HVAC Control Module |
|
Use Scenario: Regulating from 9–36V lithium-thionyl chloride or primary battery packs in remote telemetry units. IC Role / Device Role / Timing Role: Always-on power management IC providing low-noise 3.3V rail with PFM mode for sub-µA standby current. Use Value: Extends battery life by minimizing no-load draw (22µA) and enabling deep sleep modes with 1.2µA shutdown current. |
Use Scenario: Powering microcontroller, display, and relay drivers in commercial HVAC zone controllers with 24V AC/DC input. IC Role / Device Role / Timing Role: Input-tolerant DC-DC stage accepting rectified 24V AC (up to 34V peak) and delivering clean 5V/3.3V. Use Value: Withstands line surges and brownouts; RESET output coordinates safe firmware reset during undervoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR36520RNXR | Wider 3V–65V input, higher 200mA output, larger 8-pin SO PowerPAD package (5mm × 6mm), no integrated VOUT bias path. | Targeted at higher-current industrial PLC I/O modules; lacks PFM mode and monotonic prebias startup. | Select when >25mA output or >42V input margin is required; not drop-in due to different pinout, size, and control interface. |
| TPS562201DDCR | Lower 4.5V–17V input range, 2A output, 6-pin SOT-23 package, fixed 500kHz fSW, no RT/SYNC or MODE pin. | Suited for low-voltage embedded systems (e.g., 12V automotive body electronics); lacks high-voltage tolerance and programmability. | Choose for cost-sensitive, high-current 12V applications where 42V operation and light-load efficiency are unnecessary. |
Compared with LMR36520RNXR and TPS562201DDCR, the MAX17530ATB+T uniquely balances ultra-small TDFN footprint, 42V input capability, 22µA PFM quiescent current, and programmable UVLO/soft-start - making it optimal for space- and power-constrained 24V industrial nodes.
Availability
MAX17530ATB+T is available at Aetrix Electronics and suitable for industrial sensors and process control, high-voltage LDO replacement, battery-powered equipment, and HVAC and building control requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX17530ATB+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 MAX17530ATB+T belongs to Maxim's ultra-small, high-voltage DC-DC converter product line, engineered specifically for replacing inefficient LDOs and powering low-current subsystems in harsh industrial environments.
FAQ
What is the maximum input voltage rating for the MAX17530ATB+T?
The MAX17530ATB+T has an absolute maximum input voltage rating of 48V on the IN pin, with guaranteed operation across 4V to 42V. This allows robust use in 24V and 36V industrial systems, including those with transient overvoltage conditions up to 48V, without external clamping circuitry.
Does the MAX17530ATB+T support external synchronization of its switching frequency?
Yes, the MAX17530ATB+T supports external synchronization via the RT/SYNC pin - but only when the MODE pin is grounded to force PWM operation. An external clock (1.1×fSW max) must be coupled through a 47pF capacitor, with logic-high >3V and duty cycle between 10% and 70%. The internal RT resistor must be set to 10% below the sync frequency.
How does the MAX17530ATB+T achieve monotonic startup into a prebiased output?
The MAX17530ATB+T prevents reverse current flow during startup by holding both high-side and low-side MOSFETs off until the PWM comparator commands the first pulse. This ensures the output voltage ramps monotonically from its prebiased level to the target value, protecting downstream circuitry in hot-swap and redundant power applications.
What is the function of the VOUT pin on the MAX17530ATB+T?
The VOUT pin on the MAX17530ATB+T supplies bias power to internal circuitry when the output voltage exceeds 3.1V. For 3.3V–5V outputs, it must be decoupled with a 0.22µF capacitor and connected to the output capacitor's positive terminal via a 22.1Ω resistor to improve efficiency and prevent voltage overshoot during short-circuit events.
Can the MAX17530ATB+T operate in both PWM and PFM modes simultaneously?
No - the MAX17530ATB+T operates exclusively in either forced-PWM mode (MODE pin grounded) or automatic PFM mode (MODE pin floating). Mode selection is static at power-up; dynamic switching between modes during operation is not supported. PFM mode disables negative inductor current and skips pulses for light-load efficiency, while PWM maintains fixed frequency.
MAX17530ATB+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:
- 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-TDFN (3x2)
MAX17530ATB+T FAQ
1.How can I place an order for MAX17530ATB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17530ATB+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 MAX17530ATB+T reliable?
The price and inventory of MAX17530ATB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17530ATB+T is usually 5 days.
3.What payment methods are accepted for MAX17530ATB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17530ATB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17530ATB+T?
MAX17530ATB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17530ATB+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 MAX17530ATB+T?
For technical support, including MAX17530ATB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17530ATB+T requirements.
6.How does Aetrix verify that MAX17530ATB+T is sourced from the original manufacturer or authorized distributors?
All MAX17530ATB+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 MAX17530ATB+T meets industry standards.
7.What is the process for return or replacement of MAX17530ATB+T?
All MAX17530ATB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17530ATB+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 MAX17530ATB+T part is unused and in its original packaging.
Return procedure for MAX17530ATB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX17530ATB+T Tags
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