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Analog Devices Inc./Maxim Integrated MAX38911ANT+T
- Part No.:
- MAX38911ANT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-XFBGA, WLBGA
- Datasheet:
-
MAX38911ANT+T.pdf
- Description:
- IC REG 500MA
- Quantity:
- Payment:
- Shipping:
Inventory:2,801
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Product details
Overview
MAX38911ANT+T from Analog Devices is a 1.8V fixed-output, 500mA low-noise PMOS LDO linear regulator in a 1.42mm × 0.83mm WLP package, delivering 11µVRMS output noise (10Hz–100kHz), 70dB PSRR at 10kHz, and ±1% DC accuracy across load, line, and temperature - optimized for powering high-performance sensors and audio circuits in space-constrained portable devices.
For engineers reviewing the MAX38911ANT+T datasheet, MAX38911ANT+T pinout, MAX38911ANT+T application, or MAX38911ANT+T equivalent, key selection criteria include its ultra-low-noise performance, dual-mode operation (19.2µA low-power / 332µA normal), active discharge (800Ω), Power-OK output, and factory-programmed 1.8V output with no external feedback required.
Technical Context
The MAX38911ANT+T implements a PMOS pass transistor architecture with internal voltage reference (0.6V), error amplifier, and MODE-selectable regulation loop. It supports two distinct operating modes: low-power mode (20mA max, 19.2µA IQ) and high-power mode (500mA max, 332µA IQ), with automatic soft-start and 50µs settling time during MODE transitions.
Its protection suite includes reverse-current blocking, thermal shutdown (165°C trip), overcurrent limiting (700mA typ), undervoltage lockout (1.6V typ), and active discharge via internal 800Ω switch tied to OUT when EN is low - all integrated without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V (factory preprogrammed; no external resistors needed) |
| Max Output Current | 500mA in high-power mode; 20mA in low-power mode |
| Output Noise | 11µVRMS (10Hz–100kHz); enables clean power for ADCs, RF receivers, and imaging sensors |
| PSRR | 70dB at 10kHz (250mA load, 300mV VIN–VOUT separation); suppresses switching noise from upstream DC/DC converters |
| Dropout Voltage | 24.3mV at 500mA, VIN = 5.0V; ensures regulation even with tight input–output margins |
| Quiescent Current | 19.2µA (low-power mode, no load); extends battery life in always-on sensor nodes |
| Active Discharge | 800Ω internal resistor from OUT to GND when EN = low; enables fast, controlled power-down sequencing |
Pinout & Package
The MAX38911ANT+T is housed in a 1.42mm × 0.83mm, 3 × 2, 6-bump, 0.4mm pitch Wafer-Level Package (WLP), outline number 21-100458, RoHS-compliant, with exposed die attach pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Input supply pin | Accepts 1.7V–5.5V; requires 4.7µF bypass capacitor to GND for stability and transient response |
| GND | Ground reference | Common return for IN and OUT capacitors; must be low-impedance connection in PCB layout |
| EN | Enable control input | Active-high logic; pulls OUT to GND via 800Ω when low (shutdown + active discharge) |
| BYP | Bypass capacitor node | Connects 0.001–0.1µF capacitor to OUT to filter reference noise and set soft-start slew rate |
| MODE | Operating mode select | High = 500mA mode (332µA IQ); Low = 20mA mode (19.2µA IQ); sampled after soft-start completion |
| OUT | Regulated output | Delivers 1.8V ±1%; requires ≥2µF effective low-ESR output capacitance for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 11µVRMS (10Hz–100kHz) enables direct powering of precision analog and RF signal chains without additional filtering |
| Dual-mode quiescent current | 19.2µA (LPM) / 332µA (HPM) allows dynamic power scaling for intermittent-sensing applications |
| Integrated Power-OK (POK) | Open-drain output signals valid regulation (91% VOUT threshold); supports safe system power sequencing |
| Active discharge | Internal 800Ω switch discharges output capacitance rapidly on disable - eliminates hold-up voltage and simplifies multi-rail shutdown |
| Full fault protection | Reverse-current blocking, thermal shutdown (165°C), overcurrent limit (700mA), and UVLO prevent damage under abnormal conditions |
Applications
| Mobile Audio Subsystem | Digital Camera Sensor Bias |
|---|---|
|
Use Scenario: Powering MEMS microphones and Class-D audio amplifiers in smartphones with strict EMI and SNR requirements. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO supplying clean 1.8V bias to analog front-end and clock distribution circuitry. Use Value: 11µVRMS noise and 70dB PSRR at 10kHz prevent switching noise coupling into audio band, preserving >110dB SNR. |
Use Scenario: Providing stable 1.8V supply to CMOS image sensor analog core and column ADCs during burst capture. IC Role / Device Role / Timing Role: Fixed-output LDO with fast POK assertion and active discharge for synchronized sensor reset and power cycling. Use Value: ±1% DC accuracy and 24.3mV dropout ensure consistent pixel response across battery voltage range; POK enables precise exposure timing. |
| IoT Environmental Sensor Node | Portable Medical Diagnostic Sensor |
|
Use Scenario: Long-life battery-powered gas/temperature/humidity sensor with wake-on-event operation. IC Role / Device Role / Timing Role: Dual-mode LDO delivering 1.8V to MCU and sensor interface, switching to 19.2µA LPM between readings. Use Value: Ultra-low IQ in LPM extends 10-year battery life; active discharge ensures rapid, predictable wake-up from deep sleep. |
Use Scenario: Powering low-noise biopotential amplifiers and SAR ADCs in handheld ECG/EEG devices. IC Role / Device Role / Timing Role: Precision LDO with ±1% accuracy and <1µA shutdown current supporting clinical-grade signal integrity. Use Value: 11µVRMS noise avoids baseline drift in µV-level bio-signals; thermal protection prevents overheating during extended use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A20185PDBVR | 1.85V fixed output; 300mA max; 14µVRMS noise; no MODE pin or active discharge | Lacks dual-mode IQ and active discharge; suitable only for static-load, non-sequenced systems | Choose if board space allows larger SOT-23-5 and system does not require power sequencing or ultra-low-noise performance. |
| NCP163AMX180TBG | 1.8V fixed; 300mA; 25µVRMS noise; 1.7–5.5V input; no POK or MODE pin | No power-good signaling or programmable low-power mode; limited noise performance for precision analog | Select only for cost-sensitive, non-critical analog rails where 25µVRMS noise is acceptable and sequencing is handled externally. |
Compared with TPS7A20185PDBVR and NCP163AMX180TBG, the MAX38911ANT+T uniquely combines factory-fixed 1.8V output, 11µVRMS noise, dual-mode IQ, active discharge, and integrated POK - making it the only option among the three that meets stringent requirements for battery-powered, low-noise, sequenced sensor and audio subsystems.
Availability
MAX38911ANT+T is available at Aetrix Electronics and suitable for mobile phones, digital camera modules, and IoT environmental sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX38911ANT+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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX38911 series belongs to Analog Devices' ultra-low-noise LDO portfolio, designed specifically for powering noise-sensitive analog and RF circuits in portable, battery-operated equipment where size, efficiency, and signal integrity are critical.
FAQ
What is the output voltage tolerance of the MAX38911ANT+T over temperature and load?
The MAX38911ANT+T maintains ±1% DC output voltage accuracy across full operating temperature (-40°C to +125°C), input voltage (1.7V–5.5V), and load current (0.1mA–500mA). This specification is guaranteed by design and characterization, with production testing performed at room temperature per the datasheet's Note 1.
Does the MAX38911ANT+T require external feedback resistors to set its output voltage?
No. The MAX38911ANT+T is factory preprogrammed to a fixed 1.8V output voltage and contains no FB pin. Unlike the adjustable MAX38912 variant, it operates without external resistors - simplifying layout and eliminating resistor tolerance errors that affect regulation accuracy.
How does the active discharge feature work on the MAX38911ANT+T?
When the EN pin is driven low, the MAX38911ANT+T internally connects an 800Ω resistor between the OUT pin and GND. This actively discharges the output capacitor, reducing discharge time significantly compared to passive RC decay - critical for reliable multi-rail power sequencing and fast system wake-up.
What is the minimum output capacitance required for stability with the MAX38911ANT+T?
The MAX38911ANT+T is stable with a minimum effective output capacitance of 2µF. A typical design uses a 4.7µF, low-ESR (<0.03Ω) ceramic capacitor. Capacitor ESR must remain below 30mΩ to ensure phase margin and avoid oscillation under all load and temperature conditions.
Can the MAX38911ANT+T be used in high-temperature industrial environments?
Yes. The MAX38911ANT+T is rated for continuous operation from -40°C to +125°C junction temperature, with thermal shutdown activating at +165°C. Its WLP package has a θJA of 95.15°C/W on a four-layer board, enabling reliable deployment in sealed enclosures or thermally constrained industrial sensor housings.
MAX38911ANT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-XFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.3V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 750 µA
- Current - Supply (Max):
- -
- PSRR:
- 80dB ~ 44dB (1kHz ~ 1MHz)
- Control Features:
- Enable, Soft Start
- Protection Features:
- Over Current, Over Temperature, Reverse Current
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLP (1.42x0.83)
MAX38911ANT+T FAQ
1.How can I place an order for MAX38911ANT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX38911ANT+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 MAX38911ANT+T reliable?
The price and inventory of MAX38911ANT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX38911ANT+T is usually 5 days.
3.What payment methods are accepted for MAX38911ANT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX38911ANT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX38911ANT+T?
MAX38911ANT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX38911ANT+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 MAX38911ANT+T?
For technical support, including MAX38911ANT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX38911ANT+T requirements.
6.How does Aetrix verify that MAX38911ANT+T is sourced from the original manufacturer or authorized distributors?
All MAX38911ANT+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 MAX38911ANT+T meets industry standards.
7.What is the process for return or replacement of MAX38911ANT+T?
All MAX38911ANT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX38911ANT+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 MAX38911ANT+T part is unused and in its original packaging.
Return procedure for MAX38911ANT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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