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Analog Devices Inc./Maxim Integrated MAX25232ATCG/V+T
- Part No.:
- MAX25232ATCG/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX25232ATCG/V+T.pdf
- Description:
- IC REG BUCK ADJ 3A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,592
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Product details
Overview
MAX25232ATCG/V+T from Maxim Integrated is a 36V, 3A synchronous buck converter with integrated high-side and low-side MOSFETs, designed for automotive and industrial DC-DC conversion. It delivers ±2% output voltage accuracy in FPWM mode (6–18V input), features 65ns minimum on-time, 2.1MHz fixed switching frequency, and ultra-low 3.5µA quiescent current at no load - enabling reliable operation in start-stop vehicle systems and battery-powered industrial sensors.
For engineers reviewing the MAX25232ATCG/V+T datasheet, MAX25232ATCG/V+T pinout, MAX25232ATCG/V+T application, or MAX25232ATCG/V+T equivalent, key selection considerations include its adjustable 3V–10V output via external resistor divider, AEC-Q100 qualification, 40V load-dump protection, 99% dropout duty cycle, and spread-spectrum EMI reduction capability.
Technical Context
The MAX25232ATCG/V+T implements current-mode control with no external compensation required, enabling stable regulation across wide input (3.5V–36V) and output (3V–10V) ranges. Its 2.1MHz switching frequency supports compact 2.2µH inductors and 30µF ceramic output capacitance while avoiding AM band interference.
It operates in forced-PWM (FPWM) or skip mode depending on SYNC pin state, with automatic transition between modes. The device integrates thermal shutdown (175°C), overcurrent protection (3.5A typ peak), PGOOD monitoring, and internal 5V BIAS LDO - all within a thermally enhanced 3mm × 3mm TDFN package with exposed pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports full automotive battery range including cold-crank (≥3.5V) and load-dump transients (up to 40V) |
| Output Current | 3A continuous - sufficient for powering microcontrollers, CAN transceivers, and sensor signal chains in automotive ECUs |
| Output Voltage Range | 3V to 10V (adjustable via external resistor divider on FB pin) - enables flexible rail generation without custom trimming |
| Quiescent Current | 3.5µA at no load - extends battery life in always-on vehicle modules such as telematics and body controllers |
| Switching Frequency | 2.1MHz (fixed) - allows use of small 2.2µH inductors and reduces EMI filtering component count |
| Accuracy (FPWM) | ±2% over temperature and line/load - ensures compliance with tight supply tolerances for ADAS and infotainment SoCs |
| Package | 12-pin TDFN (3mm × 3mm) with exposed pad - provides 41°C/W θJA for high-power-density placement in constrained PCB areas |
Pinout & Package
MAX25232ATCG/V+T is housed in a 12-pin thermally enhanced TDFN package (3mm × 3mm) with exposed pad (EP), optimized for automotive thermal cycling and board-level reliability. The EP must be soldered to a solid ground plane for effective heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable | Logic-high enables ±3% frequency modulation to reduce EMI peak emissions; internal 1MΩ pulldown ensures default disable |
| 2 EN | High-voltage enable input | Accepts 3.3V–40V logic; enables device when pulled above 2.4V; no internal pullup/pulldown minimizes standby leakage |
| 3 BST | Bootstrap supply for high-side gate driver | Requires 0.1µF ceramic capacitor from BST to LX; enables efficient 100% duty-cycle operation in dropout |
| 4 SUP | Main power input | Connects to 4.7µF ceramic capacitor to PGND; supports 3.5V–36V operation with 40V transient tolerance |
| 5 LX | Switch node | Connects to inductor; high-impedance when disabled; internal clamp diodes protect against inductive kickback |
| 6 PGND | Power ground | Return path for high-current switching paths; must be separated from AGND and connected to EP |
| 7 AGND | Analog ground | Reference for FB, SYNC, SPS, PGOOD; requires dedicated low-noise connection to EP or system ground |
| 8 FB | Feedback input | Used with external resistor divider to set VOUT = 3V–10V; 1.0V ±1.5% reference enables precise ratio-based programming |
| 9 OUT | Regulated output | Connects to output capacitor (30µF ceramic recommended); senses regulated voltage through internal error amplifier |
| 10 BIAS | Internal 5V bias supply | Provides 5V for internal circuitry; requires ≥1µF ceramic cap to AGND; powers PGOOD pullup and SYNC/SPS logic |
| 11 SYNC | Mode select / synchronization input | Ground or open → skip mode; tied to BIAS → FPWM; accepts external clock (1.7–2.6MHz) for jitter-free synchronization |
| 12 PGOOD | Open-drain power-good indicator | Active-high signal asserts when VOUT > 93% nominal; debounced (60µs PWM / 90µs skip); requires external 20kΩ pullup |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Rated for automotive applications (-40°C to +125°C junction), including vibration, thermal cycling, and ESD robustness |
| 40V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS, reducing BOM cost and board space |
| 99% maximum duty cycle | Enables operation in dropout during low-input conditions (e.g., engine cranking), maintaining regulated output down to VIN ≈ VOUT |
| Fixed 3.5ms soft-start | Prevents inrush current and output overshoot during power-up; includes 7ms fault recovery timeout for short-circuit events |
| Integrated current-mode controller | Eliminates need for external compensation components, simplifying design and improving loop stability across operating conditions |
| PGOOD with voltage monitoring | Monitors output within ±2% window (91–95% threshold) and provides clean reset signaling for downstream processors |
Applications
| Automotive Body Control Module (BCM) | Industrial Programmable Logic Controller (PLC) I/O Power |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and sensor interface circuitry in a vehicle body control unit under varying battery conditions (6V–16V). IC Role / Device Role / Timing Role: Primary 5V or 3.3V point-of-load regulator delivering stable supply despite cold-crank dips and load-dump spikes. Use Value: AEC-Q100 rating, 40V transient tolerance, and 3.5µA quiescent current ensure long-term reliability and low parasitic drain in always-on BCM subsystems. |
Use Scenario: Generating isolated 3.3V/5V rails for digital I/O modules in factory automation PLCs operating from 24V DC bus. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter replacing discrete solutions to meet space-constrained DIN-rail mount requirements. Use Value: 3mm × 3mm TDFN package and minimal external components (2.2µH inductor + 30µF ceramic cap) reduce footprint by >40% vs. legacy designs. |
| Automotive ADAS Camera Power Supply | High-Voltage Industrial Sensor Node |
Use Scenario: Providing clean, low-noise 3.3V supply to CMOS image sensor and ISP in forward-facing ADAS camera modules. IC Role / Device Role / Timing Role: Low-EMI FPWM regulator with spread-spectrum enabled to minimize RF interference with radar and V2X receivers. Use Value: 2.1MHz fixed frequency + ±3% spread spectrum lowers peak radiated emissions by >10dB, easing CISPR 25 Class 5 compliance. |
Use Scenario: Converting 24V–36V industrial bus voltage to 5V for wireless sensor nodes with LoRaWAN or NB-IoT modems. IC Role / Device Role / Timing Role: High-input-voltage buck converter supporting wide VIN range and ultra-low IQ for multi-year battery life. Use Value: 3.5µA no-load IQ and 65ns minimum on-time allow direct step-down from 36V to 5V at high efficiency (>85% at 100mA), eliminating intermediate stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQWR | 3.5V–36V input, 4A output, 2.1MHz, but lacks AEC-Q100 qualification and 40V load-dump protection | Suitable for industrial but not automotive front-end power; requires external EMI filtering due to no spread-spectrum option | Choose LM61480RQWR only for non-automotive applications where higher current headroom is needed and qualification is not required. |
| TPS543B20RTWT | 4.5V–18V input, 3A output, 2.2MHz, AEC-Q100 rated, but no 40V transient tolerance or adjustable 3V–10V output range | Limited to mid-range automotive inputs; fixed 5V/3.3V options only - cannot replace MAX25232ATCG/V+T's programmable VOUT | Select TPS543B20RTWT only when input stays within 4.5V–18V and fixed-output configuration suffices; verify external TVS needed for load-dump. |
Compared with LM61480RQWR and TPS543B20RTWT, the MAX25232ATCG/V+T uniquely combines AEC-Q100 qualification, 40V load-dump immunity, 3V–10V programmability, and integrated spread-spectrum - making it the only drop-in solution for automotive-grade adjustable-buck applications requiring single-chip robustness.
Availability
MAX25232ATCG/V+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, ADAS camera modules, and high-voltage sensor nodes requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MAX25232ATCG/V+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX25232 product line was designed specifically for automotive power conversion - emphasizing AEC-Q100 reliability, wide-input operation, low IQ, and EMI control in compact packages for next-generation ECU and ADAS platforms.
FAQ
What is the output voltage range supported by MAX25232ATCG/V+T?
The MAX25232ATCG/V+T supports an externally adjustable output voltage range of 3V to 10V using a resistor divider connected between OUT, FB, and AGND. Its internal feedback reference is precisely 1.0V ±1.5%, enabling accurate ratio-based programming. This differs from fixed-output variants (e.g., MAX25232ATCA), which are factory-trimmed to 5V or 3.3V only.
Does MAX25232ATCG/V+T require external compensation components?
No, the MAX25232ATCG/V+T uses an integrated current-mode control architecture that eliminates the need for external compensation networks. Its internal loop is fully stabilized across all operating conditions - including full input (3.5V–36V) and output (3V–10V) ranges - reducing design complexity and component count compared to voltage-mode controllers.
How does MAX25232ATCG/V+T handle automotive load-dump transients?
The MAX25232ATCG/V+T withstands 40V load-dump transients per ISO 7637-2 Pulse 5a without external protection components. Its absolute maximum SUP rating is +40V, and internal clamping structures prevent latch-up or damage during these events - enabling direct connection to automotive battery rails without added TVS diodes in most implementations.
What is the purpose of the SPS pin on MAX25232ATCG/V+T?
The SPS (Spread-Spectrum) pin on MAX25232ATCG/V+T enables ±3% frequency modulation of the internal 2.1MHz oscillator when pulled high. This spreads radiated EMI energy across a narrow band, reducing peak emissions by up to 10dB - critical for passing CISPR 25 Class 5 in automotive camera and radar modules. The feature is inactive when SPS is low or floating.
Can MAX25232ATCG/V+T operate in dropout, and what is its minimum dropout voltage?
Yes, the MAX25232ATCG/V+T supports dropout operation with up to 99% duty cycle, allowing regulation even when input voltage approaches output voltage. Its minimum dropout voltage is determined by RDS(on) of internal FETs (70mΩ HS/LS) and load current - e.g., at 3A output, dropout is ~210mV. This enables stable operation during engine cranking (down to ~6V) when regulating 5V outputs.
MAX25232ATCG/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-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):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- 10V
- Current - Output:
- 3A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX25232ATCG/V+T FAQ
1.How can I place an order for MAX25232ATCG/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25232ATCG/V+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 MAX25232ATCG/V+T reliable?
The price and inventory of MAX25232ATCG/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX25232ATCG/V+T is usually 5 days.
3.What payment methods are accepted for MAX25232ATCG/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25232ATCG/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25232ATCG/V+T?
MAX25232ATCG/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25232ATCG/V+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 MAX25232ATCG/V+T?
For technical support, including MAX25232ATCG/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25232ATCG/V+T requirements.
6.How does Aetrix verify that MAX25232ATCG/V+T is sourced from the original manufacturer or authorized distributors?
All MAX25232ATCG/V+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 MAX25232ATCG/V+T meets industry standards.
7.What is the process for return or replacement of MAX25232ATCG/V+T?
All MAX25232ATCG/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX25232ATCG/V+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 MAX25232ATCG/V+T part is unused and in its original packaging.
Return procedure for MAX25232ATCG/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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