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Analog Devices Inc./Maxim Integrated MAX5093AATE+T
- Part No.:
- MAX5093AATE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5093AATE+T.pdf
- Description:
- IC REG DL BUCK/LNR 1MHZ 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,218
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Product details
Overview
The MAX5093AATE+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, featuring 65μA typical quiescent current in LDO mode, 5μA shutdown current, and power-on-reset with programmable timeout - designed for automotive cold-crank and load-dump resilience in always-on systems.
For engineers reviewing the MAX5093AATE+T datasheet, MAX5093AATE+T pinout, MAX5093AATE+T application, or MAX5093AATE+T equivalent, key selection considerations include its seamless buck-boost operation using a single off-the-shelf inductor, adjustable LDO output (1.5V–10V), programmable boost output (up to 12V), thermal/short-circuit protection, and TQFN-EP package capable of 2.7W dissipation at +70°C.
Technical Context
The MAX5093AATE+T combines a high-frequency PFM-controlled boost preregulator (min off-time / max on-time control) with a p-channel MOSFET LDO to achieve wide-input regulation without custom magnetics. Its boost stage regulates BSOUT to 7V (preset) or up to 12V (adjustable), while the LDO maintains precise VOUT despite VIN dropping to 3.5V - enabling uninterrupted operation during automotive cold-crank events.
Control logic includes dual-threshold boost enable/disable (VBST_EN = 2.0V typ, VBST_DIS = 2.5V typ), self-holding HOLD input with internal 4μA pullup to OUT, and open-drain RESET with 90%–92% VOUT threshold hysteresis. The internal VL regulator supplies 5.5V to core circuitry when BSOUT ≥ 5.5V, tracking BSOUT otherwise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 72V - supports full automotive battery transients including cold-crank (down to 3.5V) and load-dump (up to 72V). |
| LDO Output Voltage | Factory-preset 3.3V (±3% over temp); adjustable 1.5V–10V via external resistor divider on SET pin. |
| Boost Output Voltage | Preset 7V; adjustable up to 12V via BSFB feedback - enables flexible intermediate rail generation. |
| Quiescent Current | 65μA typical in LDO-only mode (VIN ≥ 8V) - ensures ultra-low standby power for always-on applications. |
| Output Current | 250mA guaranteed continuous - limited by thermal dissipation (2.7W @ +70°C) and internal 3A switch current limit. |
| Shutdown Current | 5μA typical - enables deep sleep states without compromising system wake-up readiness. |
| RESET Threshold | 90% VOUT trip point with 2% hysteresis - provides reliable power-fail detection for microcontroller supervision. |
Pinout & Package
MAX5093AATE+T is housed in a thermally enhanced 16-pin 5mm × 5mm thin QFN package with exposed paddle (EP), rated for up to 2.7W power dissipation at +70°C on multilayer PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN | Input supply voltage | Battery/rail input (3.5V–72V); bypassed with 47μF electrolytic + 1μF ceramic near IC. |
| 2 EN | Enable input (active-high) | Logic control: ≥2.4V enables device; ≤0.4V disables; internal 500nA pulldown. |
| 3 SGND | Signal ground reference | Reference plane for analog blocks; connected to EP and tied to PGND at input capacitor negative. |
| 4 HOLD | Self-hold control (active-low) | Forces latched ON state when pulled low; internally pulled up to OUT with 4μA current. |
| 5 PGND_LDO | LDO power ground | Power return path for LDO stage; tied to SGND at input capacitor negative. |
| 6 SET | LDO feedback input | Connect to SGND for 3.3V preset; use resistor divider to OUT/SGND for adjustable output (1.5V–10V). |
| 7 OUT_SENSE | Remote output sensing | Connects to output capacitor near load to compensate for trace IR drop and improve regulation accuracy. |
| 8 OUT | LDO regulated output | 3.3V (or adjustable) output; bypassed with 10μF ceramic capacitor to PGND_LDO. |
| 9 BSOUT | Boost regulator output | 7V (preset) or up to 12V (adjustable); bypassed with 22μF electrolytic + 1μF ceramic to PGND_BST. |
| 10–11 LX | Switch node connection | Drain of internal MOSFET; connects to inductor switch node; pins 10 & 11 must be shorted externally. |
| 12 PGND_BST | Boost regulator power ground | Power return for boost stage; tied to SGND at input capacitor negative. |
| 13 BSFB | Boost feedback input | Connect to SGND for 7V output; use resistor divider to BSOUT/PGND_BST for adjustable output (up to 12V). |
| 14 VL | Internal bias regulator output | 5.5V supply for internal circuitry when BSOUT ≥ 5.5V; tracks BSOUT otherwise; bypassed with 1μF ceramic. |
| 15 CT | RESET timeout programming | Capacitor to SGND sets RESET assertion delay; 680pF yields ~200µs timeout per datasheet Figure 21. |
| 16 RESET | Open-drain power-good indicator | Asserts low when VOUT < 90% nominal; releases high-Z after timeout when VOUT > 92% - requires external pullup to OUT. |
| EP | Exposed thermal paddle | Must be soldered to SGND plane for thermal performance and EMI reduction; improves θJA by ~30%. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost topology | Eliminates need for SEPIC/flyback transformers - uses single standard inductor and reduces BOM count. |
| Ultra-low quiescent current | 65μA typical in LDO mode enables >10-year battery life in always-on automotive modules. |
| Programmable RESET timeout | CT capacitor sets delay from power-on to RESET deassertion - supports MCU boot timing requirements. |
| Integrated self-hold circuit | HOLD input allows ignition-switch-triggered latching without external components - simplifies system power sequencing. |
| Robust protection suite | Includes thermal shutdown (+165°C), short-circuit current limiting (2.5A peak), and output overload protection. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power Supply |
|---|---|
|
Use Scenario: Powering microcontrollers and CAN transceivers in vehicle door modules during engine cranking (VIN drops to 3.5V). IC Role / Device Role / Timing Role: Primary 3.3V LDO with boost preregulator maintaining regulation through cold-crank transients. Use Value: Prevents brownout resets by sustaining 3.3V output even when battery dips below 3.3V - no external supervisor needed. |
Use Scenario: Providing isolated 5V/3.3V rails for analog sensor interfaces and digital logic in harsh industrial environments. IC Role / Device Role / Timing Role: Wide-input primary regulator converting unregulated 24V DC bus to stable LDO output. Use Value: Eliminates need for pre-regulator + LDO cascade; single-chip solution withstands 72V surges per IEC 61000-4-5. |
| Telematics Control Unit (TCU) | Rail-to-Rail Automotive Sensor Hub |
|
Use Scenario: Always-on power domain for GPS/GNSS receivers and cellular modems requiring sub-100μA standby draw. IC Role / Device Role / Timing Role: Low-IQ LDO with programmable RESET ensuring clean boot after wake-from-sleep events. Use Value: 5μA shutdown current extends backup battery life; RESET timeout matches modem firmware initialization window. |
Use Scenario: Powering multiple rail-sensitive sensors (e.g., IMU, pressure, temperature) with tight voltage tolerance. IC Role / Device Role / Timing Role: Precision-adjustable LDO (1.5V–10V) with remote sense compensating for PCB trace losses. Use Value: OUT_SENSE pin enables ±0.5% load regulation across 0–250mA - critical for ADC reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wide-input LDO-with-boost applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5092AATE+ | Same pinout and function, but max boost output limited to 11V (vs. 12V); includes integrated blocking diode (no external diode required). | Suitable where 11V boost ceiling is sufficient and board space is constrained - eliminates external Schottky diode. | Select MAX5092AATE+ when minimizing component count is prioritized over maximum boost voltage headroom. |
| LM5165QPWPRQ1 | Wide-input synchronous buck regulator (not LDO); 3V–65V input, 150mA output; no integrated LDO or RESET. | Requires external post-LDO for noise-sensitive loads; lacks built-in power-on-reset and hold functionality. | Choose LM5165QPWPRQ1 only if higher efficiency (>85%) at light loads is mandatory and system-level supervision is already implemented. |
Compared with MAX5092AATE+, the MAX5093AATE+T offers higher boost voltage capability (12V vs. 11V) and supports external Schottky diodes for lower conduction loss, while LM5165QPWPRQ1 trades integrated supervision and low-noise LDO output for higher conversion efficiency - making MAX5093AATE+T optimal for noise-sensitive, always-on automotive domains requiring guaranteed clean power and robust fault signaling.
Availability
MAX5093AATE+T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and telematics control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX5093AATE+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 precision analog and mixed-signal ICs for automotive, industrial, and communications markets, emphasizing high reliability, extended temperature operation, and functional safety compliance.
The MAX5092/MAX5093 family targets automotive power management with integrated boost+LDO architecture, specifically engineered to replace discrete DC-DC + LDO solutions in cold-crank-resilient always-on systems.
FAQ
What is the minimum input voltage required for MAX5093AATE+T to start up?
The MAX5093AATE+T has an internal undervoltage lockout (UVLO) with a rising threshold of 3.4V to 3.8V. It begins switching and regulating BSOUT once VIN exceeds approximately 3.6V (typical). Below 3.5V (falling), the device shuts down - ensuring reliable cold-crank operation down to automotive battery minimums. This behavior is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables.
Can MAX5093AATE+T operate without an external Schottky diode?
Yes - unlike the MAX5092 series, the MAX5093AATE+T does not integrate a blocking diode. However, it is designed to work with an external Schottky diode connected from LX to BSOUT (anode to LX, cathode to BSOUT), as specified in the Functional Diagram and Detailed Description. Omitting this diode will prevent proper boost operation and may cause damage. The MAX5092AATE+ includes the diode internally; MAX5093AATE+T requires it externally.
How is the RESET timeout period set for MAX5093AATE+T?
The RESET timeout period for MAX5093AATE+T is programmed by connecting a capacitor from the CT pin to SGND. A 680pF capacitor yields a typical timeout of ~200µs, as shown in Figure 21 of the datasheet. Larger values increase the delay linearly - e.g., 10nF gives ~3ms. The CT pin sources 2µA (typ) to charge the capacitor; RESET deasserts after the voltage crosses the internal 1.24V comparator threshold.
What is the maximum power dissipation capability of MAX5093AATE+T at +125°C ambient?
At +125°C ambient, the MAX5093AATE+T's power dissipation is thermally limited. With a junction-to-ambient thermal resistance (θJA) of ~37.5°C/W (per JEDEC 51 multilayer board), and maximum junction temperature of +150°C, the allowable power is (150°C − 125°C) / 37.5°C/W ≈ 0.67W. This is significantly lower than the 2.7W rating at +70°C - confirming derating is essential for high-temp operation.
Does MAX5093AATE+T support adjustable LDO output voltages above 5V?
Yes - the MAX5093AATE+T supports LDO output adjustment from 1.5V to 10V using an external resistor divider on the SET pin. This is explicitly stated in the General Description and Electrical Characteristics table (VADJMAX = 10V for MAX5093_). The 10V upper limit is enabled by its higher boost output capability (up to 12V), providing sufficient headroom for the LDO's dropout voltage (≤1.6V at 250mA).
MAX5093AATE+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:
- Obsolete
- Topology:
- Step-Down (Buck) (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 1MHz
- Voltage/Current - Output 1:
- 7V/Adj to 12V, 250mA
- Voltage/Current - Output 2:
- 3.3V/1.5V ~ 10V, 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)
MAX5093AATE+T FAQ
1.How can I place an order for MAX5093AATE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5093AATE+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 MAX5093AATE+T reliable?
The price and inventory of MAX5093AATE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5093AATE+T is usually 5 days.
3.What payment methods are accepted for MAX5093AATE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5093AATE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5093AATE+T?
MAX5093AATE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5093AATE+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 MAX5093AATE+T?
For technical support, including MAX5093AATE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5093AATE+T requirements.
6.How does Aetrix verify that MAX5093AATE+T is sourced from the original manufacturer or authorized distributors?
All MAX5093AATE+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 MAX5093AATE+T meets industry standards.
7.What is the process for return or replacement of MAX5093AATE+T?
All MAX5093AATE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX5093AATE+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 MAX5093AATE+T part is unused and in its original packaging.
Return procedure for MAX5093AATE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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