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Analog Devices Inc./Maxim Integrated MAX25232ATCG/V+
- Part No.:
- MAX25232ATCG/V+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
MAX25232ATCG/V+.pdf
- Description:
- IC REG BUCK ADJ 3A 12TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,350
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Product details
Overview
MAX25232ATCG/V+ 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 always-on power rails in battery-sensitive systems.
For engineers reviewing the MAX25232ATCG/V+ datasheet, MAX25232ATCG/V+ pinout, MAX25232ATCG/V+ application, or MAX25232ATCG/V+ equivalent, key selection criteria include its AEC-Q100 qualification, 3.5V–36V input range with 40V load-dump tolerance, adjustable 3V–10V output via external resistor divider, PGOOD monitoring, and spread-spectrum EMI reduction capability.
Technical Context
The MAX25232ATCG/V+ employs current-mode control with no external compensation required, enabling stable regulation across wide input/output ratios. Its 65ns minimum on-time supports high step-down ratios (e.g., 24V→3.3V), while internal soft-start (3.5ms typ) and thermal shutdown (175°C) ensure robust startup and fault recovery.
It operates in either forced-PWM (FPWM) or pulse-skipping mode, selected via the SYNC pin-FPWM guarantees constant 2.1MHz switching for predictable EMI, while skip mode reduces quiescent current to 3.5µA under light loads. The SPS pin enables ±3% spread-spectrum modulation to further suppress radiated emissions without affecting SYNC-synchronized operation.
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 tolerated). |
| Output Current | 3A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in ADAS and body electronics. |
| Quiescent Current | 3.5µA at no load - enables >1-year battery standby life in always-on automotive modules (e.g., telematics, alarm systems). |
| Switching Frequency | 2.1MHz (fixed) - allows use of small 2.2µH inductors and 30µF ceramic output capacitors, minimizing solution footprint. |
| Output Voltage Range | 3V to 10V (adjustable via FB resistor divider) - provides design flexibility for diverse SoC core/logic rail requirements. |
| Accuracy (FPWM) | ±2% over 6V–18V input - ensures reliable operation of voltage-sensitive processors without external trimming. |
| PGOOD Threshold | 93% rising / 92% falling - enables precise power sequencing and fault detection in multi-rail systems. |
| Package | 12-pin TDFN (3mm × 3mm, exposed pad) - thermally optimized for high-power density in space-constrained automotive PCBs. |
Pinout & Package
MAX25232ATCG/V+ is housed in a 3mm × 3mm, 12-pin TDFN package with exposed thermal pad (EP), optimized for automotive thermal cycling and high-current operation. The exposed pad must be soldered to a dedicated ground plane for effective heat dissipation (θJA = 41°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SPS | Spread-spectrum enable | Logic-high enables ±3% frequency dithering to reduce peak EMI; internal 1MΩ pulldown ensures default disable. |
| 2 EN | High-voltage enable | Accepts 3.3V–40V logic; no internal pullup/pulldown preserves ultra-low IQ; supports direct connection to MCU GPIO or automotive KEY signal. |
| 3 BST | Bootstrap supply | Drives high-side FET gate; requires 0.1µF ceramic capacitor between BST and LX for proper gate drive during 99% duty-cycle dropout operation. |
| 4 SUP | Main supply input | 3.5V–36V input; requires 4.7µF low-ESR ceramic capacitor to PGND to handle high di/dt ripple current. |
| 5 LX | Switch node | Connects to inductor; high-impedance when disabled; internal clamp diodes protect against inductive kickback during shutdown. |
| 6 PGND | Power ground | Low-impedance return path for high-frequency switching currents; must be separated from AGND and connected to EP. |
| 7 AGND | Analog ground | Reference for FB, PGOOD, and internal bias; must be star-connected to PGND only at EP to avoid noise coupling. |
| 8 FB | Feedback input | 1.0V reference (±1.5%); used with external resistor divider to set VOUT = 3V–10V; high-impedance (20nA max) minimizes divider current loss. |
| 9 OUT | Output voltage sense | Regulated output node; bypassed with ≥30µF ceramic capacitor to PGND for stability and transient response. |
| 10 BIAS | Internal 5V bias rail | Supplies internal circuitry; requires ≥1µF ceramic capacitor to AGND; powers PGOOD pullup and SYNC/SPS logic when enabled. |
| 11 SYNC | Mode select / sync input | Ground or open → skip mode; tied to BIAS → FPWM; accepts external clock (1.7–2.6MHz) for precise frequency synchronization. |
| 12 PGOOD | Open-drain power-good | Active-high status flag; requires external 20kΩ pullup to BIAS or system rail; debounced (60µs PWM / 90µs skip mode). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualified | Rated for -40°C to +125°C ambient operation - validated for engine bay, infotainment, and ADAS applications. |
| 40V load-dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS - eliminates need for discrete clamping in 12V/24V systems. |
| 99% maximum duty cycle | Enables dropout operation down to VIN – 0.3V - critical for cold-crank support where input drops to 3.5V while maintaining regulated output. |
| Integrated high- and low-side FETs | RDS(on) = 70mΩ each - eliminates external MOSFETs and gate drivers, reducing BOM count and layout complexity. |
| Fixed 3.5ms soft-start | Prevents inrush current and output overshoot during power-up - avoids triggering downstream overcurrent protection. |
| Thermal shutdown with hysteresis | Shuts down at 175°C (typ), restarts at 160°C - prevents thermal runaway during sustained overload or poor heatsinking. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
|
Use Scenario: Powering microcontroller, CAN transceiver, and sensor interface circuits in a vehicle's central body controller. IC Role / Device Role / Timing Role: Primary 5V or 3.3V point-of-load regulator delivering stable, low-noise power with precise sequencing via PGOOD and EN. Use Value: 3.5µA quiescent current extends battery life during vehicle sleep mode; 40V load-dump tolerance eliminates external protection components. |
Use Scenario: Generating isolated 3.3V logic supply for digital I/O modules in factory automation controllers. IC Role / Device Role / Timing Role: High-reliability DC-DC converter operating from unregulated 24V industrial bus with wide temperature and transient tolerance. Use Value: AEC-Q100 qualification ensures long-term reliability in harsh environments; 65ns min on-time supports 24V→3.3V conversion without external regulators. |
| ADAS Camera Power Management | Telematics Control Unit (TCU) |
|
Use Scenario: Providing clean, low-noise 1.8V or 2.5V core supply for image signal processors in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: Adjustable-output buck converter configured via FB divider to match ASIC voltage requirements; synchronized via SYNC to avoid interference with image capture timing. Use Value: 2.1MHz switching moves noise spectrum above sensitive analog video bands; spread-spectrum (SPS) further reduces EMI coupling into image sensor lines. |
Use Scenario: Powering LTE modem, GNSS receiver, and microcontroller in always-connected vehicle tracking units. IC Role / Device Role / Timing Role: Always-on power rail with ultra-low IQ, monitored by PGOOD for wake-up validation and fault reporting over cellular network. Use Value: 3.5µA standby current enables >18-month battery backup life; EN pin compatibility with 3.3V MCU GPIO simplifies control architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480RQR | 3.5V–36V input, 4A output, 2.1MHz, but 12µA IQ (no skip mode below 10mA); no spread-spectrum; QFN-16 package. | Lacks AEC-Q100 qualification and 40V load-dump rating - requires external TVS for automotive use. | Preferred for industrial non-automotive designs needing higher current headroom and simpler thermal layout. |
| TPS62933RTER | 3V–36V input, 3A output, 2.2MHz, 2.5µA IQ, but only 125°C max junction temp; no PGOOD; WSON-10 package. | Not AEC-Q100 qualified; lacks PGOOD and load-dump protection - unsuitable for safety-critical automotive subsystems. | Suitable for cost-sensitive consumer or industrial applications where extended temperature and fault signaling are not required. |
Compared with LM61480RQR and TPS62933RTER, MAX25232ATCG/V+ uniquely combines AEC-Q100 Grade-1 qualification, 40V load-dump tolerance, PGOOD, and 3.5µA quiescent current - making it the only drop-in solution for automotive BCM, ADAS, and telematics power rails requiring zero-compromise reliability and ultra-low standby power.
Availability
MAX25232ATCG/V+ is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controllers, ADAS camera systems, and telematics control units requiring stable component supply across extended temperature and lifecycle demands.
Supply support for MAX25232ATCG/V+ 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 leader specializing in high-performance analog, mixed-signal, and power management solutions for automotive, industrial, and communications markets.
The MAX25232 product line was engineered specifically for automotive-grade DC-DC conversion-delivering ultra-low IQ, AEC-Q100 compliance, and robust transient protection in minimal footprint for next-generation vehicle electronics.
FAQ
What output voltage range does the MAX25232ATCG/V+ support?
The MAX25232ATCG/V+ supports an adjustable output voltage range of 3V to 10V, set using an external resistor divider connected between OUT, FB, and AGND. Its internal feedback reference is precisely 1.0V (±1.5%), enabling accurate programming per the equation RFB1 = RFB2 × (VOUT/1.0V − 1). This flexibility makes MAX25232ATCG/V+ ideal for custom rail generation in automotive and industrial applications where fixed-output variants are insufficient.
Does the MAX25232ATCG/V+ require external compensation components?
No, the MAX25232ATCG/V+ uses an innovative current-mode control architecture that eliminates the need for external compensation networks. Its internal loop is fully stabilized across all operating conditions-including 3.5V–36V input, 3V–10V output, and 0–3A load-without additional capacitors or resistors. This simplifies design, reduces BOM count, and improves reliability compared to voltage-mode buck controllers requiring manual compensation tuning.
How does the MAX25232ATCG/V+ achieve ultra-low quiescent current?
The MAX25232ATCG/V+ achieves 3.5µA typical quiescent current by entering a deep standby mode when load current falls below ~5mA: most internal circuitry (except essential regulation blocks) is powered down, and the internal high-voltage LDO is disabled. This mode is automatically activated in skip mode and is confirmed in datasheet testing for MAX25232ATCG/V+ across its full 3V–10V output range-making MAX25232ATCG/V+ suitable for always-on automotive modules with multi-year battery life requirements.
Is the MAX25232ATCG/V+ qualified for automotive applications?
Yes, the MAX25232ATCG/V+ is AEC-Q100 Grade-1 qualified (-40°C to +125°C ambient), with built-in 40V load-dump protection, 99% duty-cycle dropout operation, and thermal shutdown (175°C). It meets stringent automotive reliability standards for use in body control modules, ADAS cameras, and telematics units-validated through accelerated lifetime testing and failure analysis per JEDEC JESD47 guidelines.
Can the MAX25232ATCG/V+ operate with an external clock source?
Yes, the MAX25232ATCG/V+ supports external clock synchronization via the SYNC pin, accepting frequencies from 1.7MHz to 2.6MHz for the 2.1MHz variant. When an external clock is applied, the device locks to that frequency and operates in forced-PWM mode-ensuring deterministic switching timing for EMI-sensitive applications like camera modules or radar systems. This capability is explicitly specified for MAX25232ATCG/V+ in the Electrical Characteristics table and Detailed Description section.
MAX25232ATCG/V+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tray
- 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 (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-TDFN (3x3)
MAX25232ATCG/V+ FAQ
1.How can I place an order for MAX25232ATCG/V+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX25232ATCG/V+ 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+ reliable?
The price and inventory of MAX25232ATCG/V+ 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+ is usually 5 days.
3.What payment methods are accepted for MAX25232ATCG/V+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX25232ATCG/V+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX25232ATCG/V+?
MAX25232ATCG/V+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX25232ATCG/V+ 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+?
For technical support, including MAX25232ATCG/V+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX25232ATCG/V+ requirements.
6.How does Aetrix verify that MAX25232ATCG/V+ is sourced from the original manufacturer or authorized distributors?
All MAX25232ATCG/V+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX25232ATCG/V+?
All MAX25232ATCG/V+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX25232ATCG/V+, 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+ part is unused and in its original packaging.
Return procedure for MAX25232ATCG/V+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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