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Analog Devices Inc./Maxim Integrated MAX15014BATX+
- Part No.:
- MAX15014BATX+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 36-WFQFN Exposed Pad
- Datasheet:
-
MAX15014BATX+.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 36TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,226
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Product details
Overview
The MAX15014BATX+ from Maxim Integrated is a dual-output power management IC integrating a 1A, 7.5V–40V input buck converter and a 50mA, 5V fixed-output LDO regulator. It delivers regulated 3.3V (B-version) from the LDO and adjustable 1.26V–32V from the buck stage, with 135kHz switching frequency, 47μA quiescent current when buck is off, and operation across –40°C to +125°C for automotive navigation systems.
For engineers reviewing the MAX15014BATX+ datasheet, MAX15014BATX+ pinout, MAX15014BATX+ application, or MAX15014BATX+ equivalent, key selection criteria include its 3.3V LDO output variant, 7.5V minimum buck input, 135kHz fixed-frequency operation, RESET timeout programmability via CT pin, and thermal shutdown with 160°C trip point.
Technical Context
This device implements voltage-mode control with feed-forward compensation for high-noise automotive environments, enabling stable regulation despite wide VIN transients. Its dual enable architecture (EN_SYS and EN_SW) allows independent control of LDO and buck sections - critical for always-on subsystems requiring low-quiescent standby.
The integrated 0.5Ω high-side MOSFET switch supports up to 1A load with cycle-by-cycle current limiting and hiccup-mode short-circuit protection. The LDO section features 78dB PSRR at 100Hz and an active-low open-drain RESET output with user-adjustable delay via external capacitor on CT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Input Range | 7.5V to 40V - supports 12V/24V automotive battery rails with cold-crank margin down to 7.5V. |
| Buck Switching Frequency | 135kHz (fixed) - enables use of cost-effective, high-saturation-current inductors; synchronizable via SYNC pin. |
| LDO Output Voltage | 3.3V (fixed, B-version) - factory-trimmed ±1.5% over temperature; no external resistors required. |
| LDO Load Current | Guaranteed 50mA - sufficient for microcontroller I/O, CAN transceivers, or sensor biasing in always-on domains. |
| Quiescent Current (LDO only) | 47μA (typ) - enables >1-year battery life in vehicle telematics modules with periodic wake-up. |
| RESET Timeout Delay | Adjustable via CT capacitor - sets delay from LDO rise to RESET deassertion; unconnected = 50μs min. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 stress requirements. |
Pinout & Package
Package: 36-pin TQFN-EP (6mm × 6mm, thermally enhanced), exposed pad soldered to SGND for 2.86W power dissipation capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN_SW | Buck converter input supply | Accepts 7.5V–40V; must exceed 7.0V UVLO threshold before regulation begins. |
| IN_LDO | LDO input supply | 5V–40V range; independent of IN_SW - allows separate battery/supply sourcing. |
| DRAIN / LX | High-side MOSFET drain & switch node | Connect both pins to inductor and freewheeling diode cathode; handles peak 1.9A current at TJ=125°C. |
| EN_SYS | System enable (active-high) | Controls LDO and enables buck when pulled high; internal 0.5µA pull-down ensures safe default-off state. |
| EN_SW | Buck converter enable (active-high) | Independent control: LDO remains active even if EN_SW = low while EN_SYS = high. |
| SET_LDO | LDO output voltage select | Grounded for 3.3V (MAX15014B); connects to resistor divider for 1.5V–11V adjustable mode. |
| LDO_OUT | LDO regulated output | 3.3V @ 50mA; requires ≥10µF low-ESR ceramic bypass to SGND for stability and PSRR performance. |
| RESET | Active-low open-drain reset signal | Pulled high externally (≥4kΩ to LDO_OUT); asserts low during LDO startup or fault; timeout set by CT capacitor. |
| CT | Reset timeout timing capacitor | Charged by 2µA current source; RESET deasserts when CT reaches ~1.24V; shorted during thermal shutdown or EN_SYS low. |
| REG | Internal 8V LDO output | Supplies gate driver and internal circuitry; bypass with ≥1µF ceramic capacitor to SGND. |
| DVREG | Gate drive supply | Connected to REG and bootstrap diode anode; provides high-side driver voltage referenced to LX. |
| SYNC | External clock synchronization input | Accepts 100–200kHz square wave; overrides internal 135kHz oscillator; tie to SGND if unused. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable inputs | EN_SYS controls LDO; EN_SW controls buck - enables flexible power sequencing for MCU + peripheral subsystems. |
| Programmable soft-start | SS pin accepts external capacitor; sets ramp time for controlled VOUT rise and inrush current limiting. |
| Feed-forward voltage-mode control | Improves transient response and noise immunity in high-dV/dt automotive environments without complex loop compensation. |
| Low-noise LDO with high PSRR | 78dB PSRR at 100Hz suppresses buck ripple and supply noise - critical for ADC references and RF biasing. |
| Hiccup-mode short-circuit protection | After 7 consecutive current-limit events, enters 512-clock-period timeout before retry - prevents thermal runaway during sustained overload. |
Applications
| Infotainment Head Unit Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powering display controller, touch processor, and audio codec in automotive head units with always-on CAN bus monitoring. IC Role / Device Role / Timing Role: Provides 3.3V always-on rail for CAN transceiver and real-time clock, plus adjustable buck output for main SoC core voltage. Use Value: 47μA LDO quiescent current extends battery backup runtime; RESET output coordinates system boot sequence after ignition-on. | Use Scenario: Supplying image sensor, ISP, and serializer in rear-view or surround-view camera modules mounted near engine bay. IC Role / Device Role / Timing Role: Delivers clean 3.3V LDO output for sensor analog front-end and 1.8V/1.2V via buck for digital processing, operating across –40°C to +125°C. Use Value: 78dB PSRR at 100Hz rejects engine cranking noise; thermal shutdown at 160°C protects against under-hood overheating. |
| Telematics Control Unit (TCU) | Vehicle-to-Everything (V2X) Radio |
Use Scenario: Powering LTE modem, GNSS receiver, and secure MCU in cellular-connected TCU modules requiring long-term battery-backed operation. IC Role / Device Role / Timing Role: Supplies 3.3V LDO for GNSS RF section and 5V buck-derived rail for modem baseband; EN_SYS enables wake-on-CAN. Use Value: 6μA system shutdown current enables multi-year battery life in parked-state tracking; CT-programmable RESET ensures reliable modem initialization. | Use Scenario: Providing regulated supplies for DSRC/WAVE or C-V2X radio transceivers operating in high-EMI vehicle RF environments. IC Role / Device Role / Timing Role: Generates ultra-low-noise 3.3V LDO output for RF synthesizer and 1.2V buck output for baseband processor. Use Value: Feed-forward control minimizes switching noise coupling into sensitive RF paths; SYNC pin allows EMI spread-spectrum alignment with other system clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC-DC + LDO power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX15015BATX+ | 4.5V–40V buck input range; 500kHz switching frequency; 5V LDO output (B-version) | Better suited for 5V logic subsystems; wider buck VIN enables operation during cold-crank (4.5V) | Select when lower buck input voltage capability or higher switching frequency is required; not pin-compatible due to different UVLO and oscillator. |
| TPS65321A-Q1 | Automotive-qualified dual buck + LDO; 3.0V–36V input; 3.3V/50mA LDO; integrated watchdog and diagnostics | Includes safety features (ISO 26262 ASIL-B ready) and fault reporting not present in MAX15014BATX+ | Choose for functional-safety-critical applications where diagnostic coverage and ASIL compliance are mandatory. |
Compared with MAX15015BATX+, the MAX15014BATX+ offers tighter cold-crank compatibility above 7.5V but sacrifices 4.5V operation; versus TPS65321A-Q1, it lacks safety diagnostics but provides superior PSRR and simpler layout with feed-forward control.
Availability
MAX15014BATX+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX15014BATX+ 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 automotive, industrial, and communications markets.
The MAX15014–MAX15017 product line targets automotive power systems requiring dual-rail generation, low quiescent current, and AEC-Q100 qualification - specifically engineered for navigation, infotainment, and ADAS subsystems.
FAQ
What is the LDO output voltage of the MAX15014BATX+?
The MAX15014BATX+ is the 'B' version, delivering a factory-trimmed 3.3V LDO output with ±1.5% accuracy over –40°C to +125°C and load currents up to 50mA. This fixed output eliminates external feedback resistors and simplifies design for noise-sensitive analog circuits.
Can the MAX15014BATX+ operate with a 5V input supply?
No, the MAX15014BATX+ buck converter requires a minimum input voltage of 7.5V. Its undervoltage lockout (UVLO) threshold is 7.0V with 0.54V hysteresis. For 5V-input applications, consider the MAX15015BATX+ (4.5V–40V range) instead.
How is the RESET timeout delay configured on the MAX15014BATX+?
The RESET timeout delay on the MAX15014BATX+ is set by an external capacitor connected to the CT pin. An internal 2µA current source charges CT; RESET deasserts when CT reaches ~1.24V. With CT unconnected, minimum delay is 50µs. Typical values range from 100pF to 10nF for delays spanning microseconds to milliseconds.
Does the MAX15014BATX+ support external synchronization of its switching frequency?
Yes, the MAX15014BATX+ supports external clock synchronization via the SYNC pin, accepting 100kHz–200kHz square-wave inputs. When driven, the internal 135kHz oscillator is overridden. If unused, SYNC must be tied to SGND to prevent noise coupling and ensure stable internal operation.
What thermal protection features does the MAX15014BATX+ include?
The MAX15014BATX+ incorporates thermal shutdown with a 160°C junction trip point and 20°C hysteresis. When triggered, it disables both buck and LDO outputs and pulls CT low to assert RESET. Operation resumes only after junction temperature falls below 140°C, ensuring robust protection in enclosed automotive enclosures.
MAX15014BATX+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 36-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Topology:
- Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 135kHz
- Voltage/Current - Output 1:
- 1.26V ~ 32V, 1A
- Voltage/Current - Output 2:
- 5V ~ 40V, 50mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 7.5V ~ 40V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-TQFN (6x6)
MAX15014BATX+ FAQ
1.How can I place an order for MAX15014BATX+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX15014BATX+ 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 MAX15014BATX+ reliable?
The price and inventory of MAX15014BATX+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX15014BATX+ is usually 5 days.
3.What payment methods are accepted for MAX15014BATX+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX15014BATX+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX15014BATX+?
MAX15014BATX+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX15014BATX+ 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 MAX15014BATX+?
For technical support, including MAX15014BATX+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX15014BATX+ requirements.
6.How does Aetrix verify that MAX15014BATX+ is sourced from the original manufacturer or authorized distributors?
All MAX15014BATX+ 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 MAX15014BATX+ meets industry standards.
7.What is the process for return or replacement of MAX15014BATX+?
All MAX15014BATX+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX15014BATX+, 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 MAX15014BATX+ part is unused and in its original packaging.
Return procedure for MAX15014BATX+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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