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Analog Devices Inc./Maxim Integrated MAX5092AATE+T
- Part No.:
- MAX5092AATE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5092AATE+T.pdf
- Description:
- IC REG DL BUCK/LNR 1MHZ 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,850
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Product details
Overview
The MAX5092AATE+T from Maxim Integrated is a wide-input, low-quiescent-current LDO regulator with integrated boost preregulator, delivering a factory-preset 3.3V output at up to 250mA across 3.5V–72V input range. It features 65μA typical quiescent current in LDO mode, 5μA shutdown current, and seamless cold-crank operation down to 3.5V - making it ideal for automotive always-on power rails such as telematics control units and ADAS domain controllers.
For engineers reviewing the MAX5092AATE+T datasheet, MAX5092AATE+T pinout, MAX5092AATE+T application, or MAX5092AATE+T equivalent, key selection criteria include its dual-stage architecture (boost + LDO), programmable reset timeout via CT pin, HOLD self-holding functionality, and thermal protection up to +150°C junction temperature.
Technical Context
The MAX5092AATE+T implements a hybrid buck-boost topology: a high-frequency PFM-controlled boost preregulator (with internal MOSFET and blocking diode) feeds a p-channel LDO stage. The boost converter disables when VBSOUT − VOUT ≥ 2.5V (typ), reducing IQ to 65μA; it re-enables within <10μs when VBSOUT − VOUT drops below 2.0V (typ), ensuring uninterrupted regulation during cold-crank transients.
Its LDO uses an internal p-MOSFET pass device with 0.9V typical dropout at 250mA, while the boost stage delivers up to 250mA BSOUT current at VIN = 4V. The RESET output is open-drain with 90% VOUT undervoltage detection and externally programmable timeout via CT capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 72V - supports full automotive battery range including cold-crank (3.5V) and load-dump (72V) events. |
| LDO Output Voltage | Factory-preset 3.3V ±3% (MAX5092A variant) - stable for MCU core/logic rails without external feedback resistors. |
| Max Output Current | 250mA continuous - limited by package thermal dissipation (2.7W at +70°C on multilayer PCB). |
| Quiescent Current | 65μA typical in LDO-only mode (VIN ≥ 8V) - enables >10-year battery life in always-on systems. |
| Shutdown Current | 5μA typical - meets ISO 26262 ASIL-B standby power requirements for automotive ECUs. |
| RESET Threshold | 90% VOUT undervoltage detection with 2% hysteresis - ensures reliable system reset before logic corruption. |
| Operating Temp | −40°C to +125°C ambient - qualified for under-hood automotive applications per AEC-Q100 Grade 1. |
Pinout & Package
MAX5092AATE+T is housed in a thermally enhanced 16-pin 5mm × 5mm thin QFN package with exposed paddle (EP), rated for 2.7W power dissipation at +70°C on multilayer PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply voltage | Battery rail input (3.5V–72V); requires 47μF electrolytic + 1μF ceramic bypass close to pin. |
| 2 EN | Enable input (active-high) | Logic-level control: ≥2.4V turns on regulator; ≤0.4V forces shutdown; internal 500nA pulldown. |
| 3 SGND | Signal ground reference | Reference plane for SET, BSFB, CT, RESET; must connect to EP and tie to PGND at input cap negative. |
| 4 HOLD | Self-hold control (active-low) | Drives low to latch regulator ON after EN release; internally pulled up to OUT with 4μA current. |
| 5 PGND_LDO | LDO power ground | Return path for LDO output current; separate from boost ground to minimize noise coupling. |
| 6 SET | LDO feedback input | Connect to SGND for 3.3V preset; use resistor divider to OUT/SGND for adjustable 1.5V–9V output. |
| 7 OUT_SENSE | Remote output voltage sense | Connect directly to output capacitor near load to compensate for PCB trace IR drop. |
| 8 OUT | LDO regulated output | 3.3V (±3%) @ 250mA; bypass with 10μF ceramic capacitor to PGND_LDO. |
| 9 BSOUT | Boost regulator output | Preset 7V; adjustable up to 11V; powers LDO stage; bypass with 22μF electrolytic + 1μF ceramic. |
| 10–11 LX | Switch node connection | Drain of internal boost MOSFET; connect pins together and to inductor switch node; max 2.5A peak. |
| 12 PGND_BST | Boost power ground | Return path for boost inductor current; tie to SGND at input cap negative to avoid ground loops. |
| 13 BSFB | Boost feedback input | Connect to SGND for 7V output; use resistor divider to BSOUT/PGND_BST for 7V–11V adjustment. |
| 14 VL | Internal IC supply rail | 5.5V regulated output for internal circuitry; bypass with 1μF/6.3V ceramic to SGND. |
| 15 CT | RESET timeout programming | Capacitor to SGND sets delay: 25μs min (no cap) to >1s (e.g., 100nF); linear with capacitance. |
| 16 RESET | Open-drain power-good indicator | Pulls low when VOUT < 90% nominal; high-impedance after timeout when VOUT > 92% nominal. |
| EP | Exposed thermal paddle | Must connect to SGND plane for thermal performance and EMI reduction; critical for 2.7W dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated boost + LDO architecture | Eliminates need for custom SEPIC/flyback magnetics; uses single off-the-shelf inductor and no external diode (MAX5092_ only). |
| Self-holding circuit via HOLD pin | Enables ignition-switch controlled power-up with zero-component latching - no external latch IC or MOSFET required. |
| Programmable power-on-reset (RESET) | CT capacitor sets precise timeout (25μs–1s+); avoids premature microcontroller boot during slow-rising VOUT. |
| Thermal and overload protection | Auto-recovery shutdown at +165°C junction; short-circuit current limit (255–490mA) prevents damage during fault conditions. |
| Low-noise LDO stage | 80dB PSRR at 100Hz and 60dB at 1MHz rejects boost switching ripple, enabling clean supply for analog/RF circuits. |
Applications
| Automotive Telematics Control Unit | ADAS Domain Controller Power Rail |
|---|---|
|
Use Scenario: Powers LTE/V2X modem, GNSS receiver, and microcontroller in vehicle infotainment gateway during engine-off battery monitoring. IC Role / Device Role / Timing Role: Primary always-on 3.3V LDO with cold-crank support and programmable RESET for safe MCU initialization. Use Value: 65μA quiescent current extends parked-battery life beyond 10 years; 3.5V startup ensures GPS lock during cranking. |
Use Scenario: Supplies vision processor I/O and sensor interface rails in centralized ADAS ECU exposed to under-hood temperatures. IC Role / Device Role / Timing Role: High-PSRR 3.3V regulator with thermal shutdown and remote sensing for precision analog front-end stability. Use Value: 80dB PSRR at 100Hz suppresses boost ripple that could corrupt image sensor data; −40°C to +125°C rating matches chassis temp range. |
| Industrial CAN Gateway Node | Railway Onboard Monitoring System |
|
Use Scenario: Provides isolated 3.3V supply for CAN transceiver and ARM Cortex-M7 host in train control network edge node. IC Role / Device Role / Timing Role: Input-tolerant LDO with 72V load-dump immunity and HOLD-based fail-safe power sequencing. Use Value: Withstands 72V transients without clamping diodes; HOLD pin enables deterministic power-up after brownout recovery. |
Use Scenario: Powers microcontroller, RTC, and non-volatile memory in onboard diagnostics unit operating across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Low-IQ always-on regulator with programmable RESET timeout for tamper-proof boot integrity verification. Use Value: 5μA shutdown current meets EN 50121-3-2 EMC standby limits; CT-programmed RESET ensures secure firmware validation window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO-with-boost-preregulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5092BATE+ | Factory-preset 5V LDO output (vs. 3.3V); identical pinout, package, and boost architecture. | Suitable where 5V logic/microcontroller supply is required instead of 3.3V; same thermal and transient performance. | Select MAX5092BATE+ only if system requires 5V output; no layout change needed but verify downstream 5V tolerance. |
| MAX5093AATE+ | Higher boost output capability (up to 12V vs. 11V); requires external Schottky diode; no integrated blocking diode. | Enables higher LDO output voltages (up to 10V) or lower boost-stage conduction loss at high current. | Choose MAX5093AATE+ only when >11V BSOUT or >250mA sustained boost current is required; adds external diode BOM cost. |
Compared with MAX5092BATE+, the MAX5092AATE+T provides lower-system-voltage compatibility for modern 3.3V MCUs, while MAX5093AATE+ trades integrated simplicity for higher boost flexibility - neither is pin-compatible without verifying diode placement and feedback resistor values.
Availability
MAX5092AATE+T is available at Aetrix Electronics and suitable for automotive telematics, ADAS domain controllers, and industrial CAN gateways requiring stable component supply across extended temperature and high-reliability environments.
Supply support for MAX5092AATE+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 high-performance analog and mixed-signal ICs for automotive, industrial, and communications markets, with emphasis on power management and reliability.
The MAX5092/MAX5093 family was engineered specifically for automotive always-on power rails, combining boost preregulation and LDO regulation to eliminate custom magnetics while meeting stringent quiescent current and thermal requirements.
FAQ
What is the guaranteed minimum input voltage for MAX5092AATE+T startup?
The MAX5092AATE+T guarantees startup at 3.5V falling input voltage, with internal undervoltage lockout releasing at 3.4V (typical rising threshold). This enables reliable operation during automotive cold-crank events where battery voltage dips to 3.5V, ensuring continuous 3.3V output to critical microcontrollers without brownout resets.
Can MAX5092AATE+T operate without external feedback resistors?
Yes - the MAX5092AATE+T is factory-configured for 3.3V LDO output. Connecting the SET pin directly to SGND activates the internal 3.3V reference, eliminating need for external resistors. Similarly, connecting BSFB to SGND configures the boost stage for 7V output, enabling fully resistor-free operation for standard 3.3V/7V use cases.
How does the HOLD pin function in MAX5092AATE+T?
The HOLD pin in MAX5092AATE+T implements a self-holding circuit: when driven low after EN enables the regulator, it latches the output ON even if EN returns low. Releasing HOLD (by disconnecting or tying to OUT) turns OFF the regulator. This enables ignition-switch-based power control without external latching components - a key feature for automotive ECU power architecture.
What thermal derating applies to MAX5092AATE+T at elevated temperatures?
MAX5092AATE+T has a thermal derating factor of 33.3mW/°C above +70°C ambient, based on JEDEC 51 multilayer board conditions. At +105°C ambient, maximum continuous power dissipation drops to ~1.5W. Designers must ensure PCB copper area, airflow, and component placement maintain junction temperature ≤ +150°C under worst-case load and ambient conditions.
Is MAX5092AATE+T compatible with 72V load-dump transients?
Yes - MAX5092AATE+T is rated for absolute maximum input voltage of +80V and operates continuously across 3.5V–72V. Its internal UVLO, robust gate drive, and thermal shutdown protect against 72V load-dump events common in 24V automotive systems. No external TVS or clamping is required for compliance with ISO 7637-2 Pulse 5a/b.
MAX5092AATE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 1MHz
- Voltage/Current - Output 1:
- 7V/Adj to 11V, 250mA
- Voltage/Current - Output 2:
- 3.3V/1.5V ~ 9V, 250mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 3.5V ~ 72V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX5092AATE+T FAQ
1.How can I place an order for MAX5092AATE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5092AATE+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 MAX5092AATE+T reliable?
The price and inventory of MAX5092AATE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5092AATE+T is usually 5 days.
3.What payment methods are accepted for MAX5092AATE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5092AATE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5092AATE+T?
MAX5092AATE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5092AATE+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 MAX5092AATE+T?
For technical support, including MAX5092AATE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5092AATE+T requirements.
6.How does Aetrix verify that MAX5092AATE+T is sourced from the original manufacturer or authorized distributors?
All MAX5092AATE+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 MAX5092AATE+T meets industry standards.
7.What is the process for return or replacement of MAX5092AATE+T?
All MAX5092AATE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5092AATE+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 MAX5092AATE+T part is unused and in its original packaging.
Return procedure for MAX5092AATE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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