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Analog Devices Inc./Maxim Integrated MAX15009ATN+T
- Part No.:
- MAX15009ATN+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 56-WFQFN Exposed Pad
- Datasheet:
-
MAX15009ATN+T.pdf
- Description:
- IC REG LIN POS ADJ 300MA 56TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,168
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Product details
Overview
The MAX15009ATN+T from Maxim Integrated is a 300mA LDO regulator with integrated switched output and overvoltage protection (OVP) controller, designed for automotive power systems. It operates from 5V to 40V input, withstands 45V load-dump transients, delivers 5V fixed LDO output (±1.8% over temperature), features 67μA quiescent current, and supports OVP threshold adjustment via external resistor divider - used in multimedia power supplies requiring robust battery-supplied rail conditioning.
For engineers reviewing the MAX15009ATN+T datasheet, MAX15009ATN+T pinout, MAX15009ATN+T application, or MAX15009ATN+T equivalent, key selection criteria include its dual-rail control (LDO + switch + OVP), programmable reset timeout (via CT capacitor), adjustable OVP threshold (FB_PROT), 0.28Ω internal switch RDS(ON), and -40°C to +125°C automotive qualification in a 5mm × 5mm TQFN package.
Technical Context
The MAX15009ATN+T integrates three independent functional blocks: a 300mA LDO with microprocessor reset output and HOLD latching logic; a current-limited switched output with programmable blanking delay (OC_DELAY) and adjustable ILIM threshold (30–240mA); and an external n-channel MOSFET–driven OVP controller (MAX15009-specific) configurable as either load-disconnect switch or closed-loop voltage limiter via SOURCE/FB_PROT feedback topology.
Its architecture uses separate ground domains (SGND for signal, PGND for protector pulldown return), charge-pump–driven GATE output (8.1V above VIN, 63mA pulldown), and dual-mode FB_LDO sensing (fixed 5V or adjustable 1.8V–11V). Thermal shutdown triggers at +160°C with 20°C hysteresis, and UVLO activates at 4.27V (typ) with 260mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 5V to 40V - supports 12V/24V automotive batteries and handles load-dump surges up to 45V without damage. |
| LDO Output Voltage | 5.00V ±1.8% (4.92V–5.09V) - tightly regulated fixed output; adjustable 1.8V–11V via FB_LDO divider. |
| Quiescent Current | 67μA (typ) at light load - enables low-power always-on operation in battery-backed systems. |
| OVP Threshold Accuracy | 1.235V ±2.5% at FB_PROT - sets precise overvoltage trip point (e.g., 35V or 42V) using external resistive divider. |
| Switch RDS(ON) | 0.28Ω (typ) - minimizes dropout (36–70mV at 100mA) and conduction loss in high-current switched loads. |
| Reset Timeout Programmability | Adjustable via CT capacitor (e.g., 220pF → ~0.4ms; 2.2nF → ~1.8ms) - provides flexible power-on sequencing timing. |
| Operating Temperature | -40°C to +125°C - fully specified for under-hood automotive environments per AEC-Q100 stress requirements. |
Pinout & Package
Package: 32-pin thermally enhanced TQFN (5mm × 5mm, exposed pad), RoHS-compliant, rated for 2.7W continuous dissipation at +70°C (θJA = 29.0°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 19,20) | Input Supply Rail | Accepts 5V–40V input; bypassed with 10μF/ESR <1.5Ω capacitor to SGND. |
| OUT_LDO (Pins 21,22) | LDO Regulated Output | Delivers 5V (or adjustable) at up to 300mA; requires ≥22μF ceramic output capacitance. |
| OUT_SW (Pins 27,28) | Switched Output | Provides current-limited path from OUT_LDO; supports remote load control with programmable fault recovery. |
| FB_PROT (Pin 10) | OVP Threshold Sense Input | Monitors system voltage via external divider; determines OVP trip point (1.235V reference) for disconnect or limiting mode. |
| GATE (Pin 12) | External MOSFET Gate Driver | Charge-pump output driving external n-channel MOSFET gate; 63mA pulldown ensures fast turn-off during overvoltage. |
| SOURCE (Pin 13) | OVP Feedback Reference | Connects to MOSFET source terminal; enables closed-loop voltage limiting mode when tied to FB_PROT divider. |
| RESET (Pin 7) | Open-Drain Reset Output | Active-low signal asserting while VOUT_LDO < 92.5% of nominal; timeout set by CT capacitor. |
| EN_LDO / EN_SW / EN_PROT (Pins 16,17,18) | Independent Enable Inputs | Active-high logic controls LDO, switch, and OVP blocks separately; each internally pulled down (1μA). |
| HOLD (Pin 25) | LDO State Latch Input | Active-low hold function maintains LDO ON even after EN_LDO is removed - critical for brownout resilience. |
| OC_DELAY (Pin 23) | Overcurrent Blanking Timer | Capacitor-connected node setting blanking time before switch shutdown; prevents false trips on inrush. |
| ILIM (Pin 24) | Switch Current Limit Set | Resistor-to-SGND sets current limit (30–240mA); connect to OUT_LDO for factory preset 170mA (min). |
| SGND / PGND (Pins 5,6) | Signal & Power Grounds | Separate grounds minimize noise coupling; PGND returns OVP pulldown current - tie together at bypass cap negative. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated OVP Controller | Configurable as load-disconnect switch or closed-loop voltage limiter using external n-MOSFET - eliminates need for discrete protection ICs. |
| Low-IQ LDO with Hold Function | 67μA quiescent current + HOLD latching enables reliable power sequencing in start-stop automotive systems without MCU intervention. |
| Programmable Switch Fault Recovery | OC_DELAY capacitor sets user-defined blanking time and autoretry delay - avoids latch-up during transient overloads. |
| Thermally Robust TQFN Package | 5mm × 5mm footprint with exposed pad (EP) tied to SGND - achieves θJC = 1.7°C/W for high-power density in space-constrained modules. |
| Automotive-Grade Reliability | Qualified to -40°C to +125°C ambient, 45V load-dump tolerant, and AEC-Q100–compatible design - suitable for front-end power in infotainment ECUs. |
Applications
| Infotainment System Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers DSP, display interface, and audio codec in automotive head units where battery voltage varies from 6V (cold crank) to 45V (load dump). IC Role / Device Role / Timing Role: Provides clean 5V rail (LDO), enables auxiliary 5V-peripheral switching (OUT_SW), and protects downstream ASICs from overvoltage events (OVP controller). Use Value: Single-chip solution reduces BOM count vs. discrete LDO + switch + TVS + OVP IC, while maintaining <1.8% output regulation across temperature. |
Use Scenario: Supplies image sensor and serializer in rear-view or surround-view cameras mounted near vehicle exterior. IC Role / Device Role / Timing Role: Delivers stable 5V to sensor (LDO), powers LED flash via switched output (OUT_SW), and disconnects camera rail during battery overvoltage (OVP switch mode). Use Value: 67μA IQ extends parking-mode runtime; OVP response <0.6µs prevents sensor latch-up during alternator surge. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) Subsystem |
Use Scenario: Conditions power for LTE modem, GNSS receiver, and CAN transceiver in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Generates primary 5V domain (LDO), isolates modem RF section via switched output (OUT_SW), and limits bus voltage during jump-start (OVP limiter mode). Use Value: RESET output synchronizes modem boot sequence; CT-programmed timeout ensures deterministic power-up timing across temperature. |
Use Scenario: Powers door module microcontroller and window motor driver ICs in centralized body electronics architecture. IC Role / Device Role / Timing Role: Supplies MCU core voltage (LDO), drives window lift relay coil (switched output), and disables entire subsystem during battery overvoltage (OVP disconnect). Use Value: HOLD input maintains MCU supply during brief cranking dips; ILIM resistor sets safe 100mA limit for relay coil drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX15011ATN+T | Omits OVP controller (no FB_PROT, GATE, SOURCE pins); identical LDO + switch functionality and pinout. | Used where overvoltage protection is handled externally (e.g., upstream TVS or dedicated OVP IC). | Select when OVP is unnecessary - saves cost and simplifies layout while retaining LDO/reset/switch features. |
| TLE8888-2SA | Includes integrated high-side switch (not LDO), no programmable reset, wider 3.5V–40V range, but lacks adjustable OVP threshold and CT-based timeout. | Targets high-current load switching (up to 5A) rather than precision-regulated low-noise supply generation. | Choose for pure load-switching applications without LDO regulation needs; not drop-in compatible due to different pin functions and control logic. |
Compared with MAX15011ATN+T and TLE8888-2SA, the MAX15009ATN+T uniquely combines regulated LDO output, current-limited switching, and field-configurable OVP in one package - enabling compact, fail-safe power architectures where rail integrity, sequencing, and transient protection must coexist.
Availability
The MAX15009ATN+T is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature and high-reliability automotive qualification.
Supply support for MAX15009ATN+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, emphasizing integration, reliability, and power efficiency.
The MAX15009ATN+T belongs to Maxim's automotive power management portfolio, engineered specifically for robust front-end power conditioning in vehicles - integrating LDO regulation, load switching, and overvoltage protection to simplify ECU power architecture.
FAQ
What is the maximum input voltage the MAX15009ATN+T can withstand during load-dump events?
The MAX15009ATN+T is rated to withstand load-dump transients up to 45V without damage. Its absolute maximum IN rating is +45V, and it operates continuously from 5V to 40V. This makes the MAX15009ATN+T suitable for 12V and 24V automotive systems where ISO 7637-2 Pulse 5a/b surges occur. The device incorporates internal protection circuitry to maintain functionality during these events.
How do I configure the MAX15009ATN+T for adjustable LDO output voltage?
To configure the MAX15009ATN+T for adjustable LDO output (1.8V–11V), connect FB_LDO to an external resistive divider between OUT_LDO and SGND instead of tying it directly to SGND. The internal reference is 1.235V, so VOUT = 1.235V × (1 + R1/R2). The MAX15009ATN+T datasheet provides standard resistor values for common outputs like 3.3V and 12V, and specifies minimum load requirements to ensure stability.
Can the MAX15009ATN+T operate in overvoltage-limiter mode, and how is it implemented?
Yes, the MAX15009ATN+T supports overvoltage-limiter mode. To implement it, connect the SOURCE pin to the source terminal of the external n-channel MOSFET and tie FB_PROT to a resistive divider between SOURCE and SGND. This creates closed-loop feedback that regulates the source voltage - turning the MOSFET into a hysteretic clamp. In this mode, the MAX15009ATN+T actively limits output voltage rather than disconnecting the load.
What is the purpose of the HOLD pin on the MAX15009ATN+T, and how does it affect power sequencing?
The HOLD pin on the MAX15009ATN+T provides latched enable functionality: when EN_LDO is high and HOLD is pulled low, the LDO remains enabled even after EN_LDO is removed or drops - preventing unintended shutdown during brief input dips. This is essential for automotive start-stop operation. For the MAX15009ATN+T, HOLD is internally pulled up to OUT_LDO (0.6μA), so leaving it unconnected defaults to normal enable behavior.
Does the MAX15009ATN+T require external components for basic operation, and which ones are mandatory?
Yes, the MAX15009ATN+T requires several mandatory external components: a 10μF input capacitor (ESR <1.5Ω) from IN to SGND; a ≥22μF ceramic output capacitor from OUT_LDO to SGND; a 0.1μF capacitor from OUT_SW to SGND; and a capacitor from CT to SGND to set RESET timeout. For OVP operation, FB_PROT requires a resistive divider, and GATE/SOURCE require connection to an external n-channel MOSFET. These are all specified in the MAX15009ATN+T typical application circuits.
MAX15009ATN+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 56-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.8V, (5V)
- Voltage - Output (Max):
- 11V
- Voltage Dropout (Max):
- 1.5V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 85 µA
- Current - Supply (Max):
- 500 µA
- PSRR:
- 60dB (100Hz)
- Control Features:
- Current Limit, Enable, Hold, Reset
- Protection Features:
- Load Dump, Over Temperature, Over Voltage, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TQFN (8x8)
MAX15009ATN+T FAQ
1.How can I place an order for MAX15009ATN+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX15009ATN+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 MAX15009ATN+T reliable?
The price and inventory of MAX15009ATN+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX15009ATN+T is usually 5 days.
3.What payment methods are accepted for MAX15009ATN+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX15009ATN+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX15009ATN+T?
MAX15009ATN+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX15009ATN+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 MAX15009ATN+T?
For technical support, including MAX15009ATN+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX15009ATN+T requirements.
6.How does Aetrix verify that MAX15009ATN+T is sourced from the original manufacturer or authorized distributors?
All MAX15009ATN+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 MAX15009ATN+T meets industry standards.
7.What is the process for return or replacement of MAX15009ATN+T?
All MAX15009ATN+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX15009ATN+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 MAX15009ATN+T part is unused and in its original packaging.
Return procedure for MAX15009ATN+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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