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Analog Devices Inc./Maxim Integrated MAX15462CATA+T
- Part No.:
- MAX15462CATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN
- Datasheet:
-
MAX15462CATA+T.pdf
- Description:
- IC REG BUCK ADJ 300MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:7,014
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Product details
Overview
MAX15462CATA+T from Analog Devices is a high-efficiency, 42V-input synchronous step-down DC-DC converter with integrated MOSFETs, delivering up to 300mA at adjustable output voltages (0.9V to 0.89×VIN), featuring peak-current-mode control, PFM/PWM mode selection via MODE pin, and operation across –40°C to +125°C ambient. It targets industrial point-of-load regulation in space-constrained systems.
For engineers reviewing the MAX15462CATA+T datasheet, MAX15462CATA+T pinout, MAX15462CATA+T application, or MAX15462CATA+T equivalent, this page delivers verified technical context, confirmed pin functions, real-world application constraints, and validated alternative options for industrial power design.
Technical Context
The MAX15462CATA+T employs a peak-current-mode architecture with internal slope compensation and a latched MODE pin that determines startup behavior: grounded MODE enables forced-PWM (fixed 465–535kHz switching), while unconnected MODE enables PFM for light-load efficiency. Its error amplifier compares FB/VOUT against a precise 0.9V reference (±1.3% over temperature) to regulate output.
It integrates a 5V LDO (VCC) with 4.75–5.25V output, 13–50mA current limit, and 150mV dropout at 5mA; features monotonic soft-start (4.1ms typical), hiccup-mode overcurrent protection (0.56A peak limit), and open-drain RESET with 92–97.5% undervoltage threshold and 2ms delay after regulation recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 42V - supports wide industrial input rails including 24V and 36V systems without external pre-regulation. |
| Output Voltage Range | 0.9V to 0.89 × VIN - adjustable via external resistor divider on FB/VOUT, enabling custom rail generation. |
| Max Output Current | 300mA - sufficient for low-power microcontrollers, sensors, and analog front-ends in harsh environments. |
| Peak Efficiency | 92% - achieved at mid-load (e.g., 100–200mA) with ceramic capacitors and optimized layout. |
| Switching Frequency | 465–535kHz - fixed-frequency PWM mode enables predictable EMI filtering; PFM mode skips pulses below ~55mA load. |
| Shutdown Current | 2.2µA (typ) - enables ultra-low-power standby in battery-backed or energy-harvested systems. |
| Operating Temperature | –40°C to +125°C ambient - qualified for industrial and automotive under-hood applications. |
Pinout & Package
MAX15462CATA+T is housed in an 8-pin, 2mm × 2mm TDFN package with exposed thermal pad (pin 8 = LX, top-side thermal connection). The compact footprint supports high-density PCB layouts with minimal board area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | Primary input supply (4.5–42V); requires local 1µF X7R ceramic bypass to GND for stability and noise suppression. |
| EN/UVLO (Pin 2) | Enable / Input UVLO Input | Active-high enable with programmable turn-on threshold (1.19–1.24V rising); also serves as input undervoltage detector. |
| VCC (Pin 3) | Internal LDO Output | 5V regulated supply for internal circuitry; must be bypassed with ≥1µF ceramic capacitor to GND. |
| FB/VOUT (Pin 4) | Feedback Input | Connects to resistor divider for adjustable output; internally referenced to 0.9V ±1.3% for precision regulation. |
| MODE (Pin 5) | Control Mode Selection | Latched at power-up: GND = forced-PWM (constant frequency); open = PFM (pulse-skipping, high light-load efficiency). |
| RESET (Pin 6) | Open-Drain Reset Output | Asserts low when VOUT falls below 92% of regulation; releases high-impedance 2ms after VOUT exceeds 95%. |
| GND (Pin 7) | Power Ground | Common return for VIN, VCC, FB/VOUT, and LX; must connect to low-impedance ground plane at single-point star node. |
| LX (Pin 8) | Switch Node | Connection to inductor switch node; high-impedance during shutdown; carries full switching current (±800mA RMS). |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | Integrated high-side pMOS (1.75Ω max @ +25°C) and low-side nMOS (0.55Ω max @ +25°C) eliminate external FETs and Schottky diodes. |
| Internal Compensation | Fixed-frequency current-mode loop requires no external compensation components-reduces BOM count and layout sensitivity. |
| Programmable EN/UVLO Threshold | External resistor divider on EN/UVLO sets precise input-voltage turn-on point (e.g., 12V or 24V system wake-up). |
| Monotonic Soft-Start into Prebiased Output | 4.1ms internal soft-start prevents output voltage overshoot or reverse current flow when powering up into existing rail voltage. |
| Hiccup-Mode Overcurrent Protection | Auto-retry current limiting (0.56A peak, 0.66A runaway) protects against sustained short-circuit without thermal runaway. |
| Thermal Shutdown with Hysteresis | 166°C trip with 10°C hysteresis ensures safe recovery after overheating events in sealed enclosures or high ambient conditions. |
Applications
| Process Control Sensors | 4–20mA Loop Transmitters |
|---|---|
Use Scenario: Powering isolated analog sensor front-ends in PLC I/O modules operating from 24V industrial bus rails. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 24V to 3.3V/5V for ADCs, op-amps, and signal conditioning circuits. Use Value: High input voltage range eliminates need for intermediate buck stages; PFM mode extends battery life in wireless sensor nodes. |
Use Scenario: Supplying precision current-loop transmitter ICs (e.g., XTR115) requiring stable 5V or adjustable bias from 12–42V field wiring. IC Role / Device Role / Timing Role: Regulator with tight output tolerance (±1.5%) and low noise to maintain 4–20mA accuracy under varying line conditions. Use Value: Integrated RESET monitors output integrity; hiccup protection prevents latch-up during loop fault conditions. |
| HVAC Zone Controllers | Industrial IoT Edge Nodes |
Use Scenario: Powering microcontroller, RF transceiver, and environmental sensors in DIN-rail mounted HVAC controllers powered from 24V AC/DC supplies. IC Role / Device Role / Timing Role: Main DC-DC converter delivering 3.3V at 300mA with robust ESD and thermal performance in high-temperature cabinets. Use Value: –40°C to +125°C rating ensures reliability in unventilated enclosures; TDFN package enables compact, fanless designs. |
Use Scenario: Providing clean, efficient power to ARM Cortex-M based edge nodes with BLE/Wi-Fi radios and multiple peripherals. IC Role / Device Role / Timing Role: Adjustable-output regulator supporting dual-rail requirements (e.g., 1.8V core, 3.3V I/O) via feedback divider reconfiguration. Use Value: 2.2µA shutdown current enables multi-year battery operation; soft-start prevents brown-out during cold boot. |
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, fixed 3.3V/5V only; no adjustable output or MODE-selectable PFM/PWM. | Lacks FB/VOUT adjustability and flexible mode control-unsuitable for custom voltage rails or ultra-low-IQ sleep modes. | Select MAX15462CATA+T when adjustable output, PFM efficiency below 50mA, or 0.9V reference precision is required. |
| TPS563211DDFR | 17V input max, 3A output, external compensation; higher current but incompatible with >17V industrial inputs. | Cannot replace MAX15462CATA+T in 24V/36V systems without upstream pre-regulation-adds cost and complexity. | Choose MAX15462CATA+T for direct 42V-to-3.3V/5V conversion in space- and thermal-constrained industrial modules. |
Compared with LMR36520RNXR and TPS563211DDFR, MAX15462CATA+T uniquely combines 42V input capability, 0.9V precision reference, MODE-selectable operation, and ultra-small TDFN packaging-making it optimal for compact, high-voltage, low-power industrial regulators where flexibility and thermal resilience are critical.
Availability
MAX15462CATA+T is available at Aetrix Electronics and suitable for process control sensors, 4–20mA loop transmitters, HVAC zone controllers, industrial IoT edge nodes, and high-voltage LDO replacement applications requiring stable component supply and long-term industrial qualification.
Supply support for MAX15462CATA+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 is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets with precision power, sensing, and signal chain solutions.
The MAX15462 series was designed specifically for rugged, ultra-compact industrial point-of-load regulation-delivering high efficiency, wide input range, and robust protection in extreme temperature environments without external compensation or discrete FETs.
FAQ
What output voltage options does the MAX15462CATA+T support?
The MAX15462CATA+T is the adjustable-output variant of the MAX15462 family and supports output voltages from 0.9V up to 0.89 × VIN using an external resistor divider on the FB/VOUT pin. Its internal reference is precisely 0.9V (±1.3% over temperature), enabling accurate regulation across the full range. Unlike the fixed 3.3V (MAX15462A) or 5V (MAX15462B) versions, MAX15462CATA+T offers design flexibility for custom rail generation in mixed-voltage systems.
How does the MODE pin affect MAX15462CATA+T operation?
The MODE pin on MAX15462CATA+T is latched at power-up and determines control mode: grounding MODE forces constant-frequency PWM operation (465–535kHz) for EMI-sensitive applications, while leaving MODE unconnected enables PFM mode-skipping pulses at light loads to achieve >85% efficiency down to 1mA. Mode changes during operation are ignored; the setting is static after startup.
Can MAX15462CATA+T start up into a prebiased output?
Yes, MAX15462CATA+T supports monotonic soft-start into a prebiased output in both PFM and forced-PWM modes. Its internal soft-start ramp begins only after EN/UVLO exceeds threshold and does not discharge the output capacitor, preventing reverse current flow-a critical feature for multi-rail systems where other supplies may already be active when MAX15462CATA+T powers up.
What protection features are built into the MAX15462CATA+T?
MAX15462CATA+T includes hiccup-mode overcurrent protection (0.56A peak, 0.66A runaway limit), thermal shutdown (166°C with 10°C hysteresis), output undervoltage monitoring via open-drain RESET (92–97.5% thresholds), and input UVLO with programmable EN/UVLO threshold. These features ensure reliable operation in industrial environments with transient overloads, high ambient temperatures, and unstable input rails.
Is the MAX15462CATA+T pin-compatible with other variants in the MAX15462 family?
Yes, MAX15462CATA+T shares identical 8-pin TDFN (2mm × 2mm) packaging and pinout with MAX15462AATA+T and MAX15462BATA+T-including VIN, EN/UVLO, VCC, FB/VOUT, MODE, RESET, GND, and LX. This allows drop-in replacement across output voltage variants in the same PCB layout, simplifying design reuse and inventory management for industrial power subsystems.
MAX15462CATA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 8-WFDFN
- 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):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 37.37V
- Current - Output:
- 300mA
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x2)
MAX15462CATA+T FAQ
1.How can I place an order for MAX15462CATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX15462CATA+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 MAX15462CATA+T reliable?
The price and inventory of MAX15462CATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX15462CATA+T is usually 5 days.
3.What payment methods are accepted for MAX15462CATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX15462CATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX15462CATA+T?
MAX15462CATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX15462CATA+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 MAX15462CATA+T?
For technical support, including MAX15462CATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX15462CATA+T requirements.
6.How does Aetrix verify that MAX15462CATA+T is sourced from the original manufacturer or authorized distributors?
All MAX15462CATA+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 MAX15462CATA+T meets industry standards.
7.What is the process for return or replacement of MAX15462CATA+T?
All MAX15462CATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX15462CATA+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 MAX15462CATA+T part is unused and in its original packaging.
Return procedure for MAX15462CATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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