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Analog Devices Inc./Maxim Integrated MAX38913AATD+T
- Part No.:
- MAX38913AATD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
MAX38913AATD+T.pdf
- Description:
- IC REG 1A DUAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,640
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Product details
Overview
MAX38913AATD+T from Analog Devices is a 4µVRMS ultra-low-noise 1A low-dropout linear regulator with dynamic two-level output voltage selection and integrated pass-through mode. It delivers ±1% output accuracy across -40°C to +125°C, supports 1.8V–5.5V input and 0.6V–5.0V output ranges, and features fast 6Ω active discharge. It is used in high-sensitivity image sensor power rails where noise and transient response are critical.
For engineers reviewing the MAX38913AATD+T datasheet, MAX38913AATD+T pinout, MAX38913AATD+T application, or MAX38913AATD+T equivalent, key selection criteria include ultra-low output noise (4µVRMS), dual-mode voltage scaling (MODE1/MODE2), pass-through bypass capability, thermal shutdown at 165°C, and compatibility with 4µF minimum output capacitance.
Technical Context
The MAX38913AATD+T implements a dual-rail LDO architecture with independent RSEL1/RSEL2 resistor-programmable voltage settings for MODE1 and MODE2, enabling dynamic voltage scaling without external controllers. Its feedback loop incorporates BYP pin-controlled slew rate (50µA/CBYP) for controlled transitions between output levels.
It integrates three distinct operational modes-regulation (MODE1/MODE2), pass-through (IN→OUT short), and shutdown (6Ω active discharge)-all selected via EN1/EN2 logic states. The TDFN package variant includes dedicated open-drain POK and PORB pins for system sequencing, while maintaining 75dB PSRR at 10kHz and 28mV dropout at 1A/5.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Noise | 4µVRMS (10Hz–100kHz): Enables clean power for CMOS image sensors and precision ADCs without added filtering. |
| Max Output Current | 1A continuous: Supports high-current digital imaging subsystems including ISP cores and analog front-ends. |
| Dropout Voltage | 28mV at 1A/5.0V input: Minimizes power loss and heat generation in battery-powered portable sensors. |
| Output Accuracy | ±1% over line/load/temperature: Ensures stable reference voltage for analog signal chains under varying conditions. |
| PSRR | 75dB at 10kHz: Rejects switching noise from adjacent DC/DC converters in mixed-signal SoC power domains. |
| Active Discharge | 6Ω resistance: Rapidly discharges up to 300µF output capacitance during shutdown, preventing hold-up voltage issues. |
| Operating Temp | -40°C to +125°C junction: Qualified for automotive camera modules and industrial vision systems. |
Pinout & Package
MAX38913AATD+T is packaged in a 3mm × 3mm, 14-pin TDFN (Package Code: T1433+2C) with exposed thermal pad. Pin functions are validated per Analog Devices' official pin configuration diagram (Rev 3, p.10).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 1,14) | Input supply connection | Dual-pin layout reduces IR drop and improves current handling for 1A load; requires ≥4µF ceramic capacitor to GND. |
| OUT (Pins 3,7) | Regulated output node | Dual-output pins lower impedance path to load; supports up to 10µF recommended output capacitance. |
| GND (Pin 2) | Ground reference | Primary ground return for regulation loop; must be connected to exposed pad for optimal thermal performance. |
| EN1 / EN2 (Pins 10,11) | Mode control inputs | Logic-selectable states: 01=MODE1, 11=MODE2, 10=pass-through, 00=shutdown with active discharge. |
| RSEL1 / RSEL2 (Pins 8,9) | Voltage select inputs | Resistor-to-GND sets MODE1/MODE2 output (MAX38913-specific); left floating for MAX38914 preprogrammed variants. |
| POK / PORB (Pins 6,5) | Status outputs | Open-drain signals for power sequencing: POK asserts when VOUT ≥91% of target; PORB holds reset for 10ms post-regulation. |
| BYP (Pin 4) | Slew rate control node | Connects to OUT via 10nF–100nF capacitor; determines dV/dt during voltage transitions (50µA/CBYP). |
| OUTS (Pin 12) | Remote sense input | Enables Kelvin sensing for improved load regulation in high-current PCB traces with voltage drop. |
Key Features
| Feature | Design Value |
|---|---|
| Two-level dynamic voltage scaling | Independent MODE1/MODE2 regulation with 33 programmable output options each (via RSEL1/RSEL2 resistors). |
| Pass-through mode | IN-to-OUT direct conduction with 0.06Ω RON, reducing quiescent current to 115µA while retaining 2A current limit. |
| Ultra-low noise regulation | 4µVRMS output noise (10Hz–100kHz) achieved via internal BYP-filtered reference and low-noise error amplifier. |
| Fast active discharge | 6Ω on-chip discharge path pulls OUT to GND in shutdown, clearing 100µF in <17ms (t = R×C ≈ 6Ω × 100µF). |
| Integrated protection | Thermal shutdown (165°C trip), overcurrent limiting (1.4A typ), reverse-current blocking, and UVLO (1.75V rising). |
Applications
| Image Sensor Power | Portable Sensor Hub |
|---|---|
Use Scenario: Powering high-resolution CMOS image sensors in automotive ADAS cameras requiring minimal temporal noise. IC Role / Device Role / Timing Role: Primary LDO supplying analog pixel array and column ADC circuitry with ultra-low ripple. Use Value: 4µVRMS noise prevents fixed-pattern noise (FPN) and enables >70dB SNR in raw image data. |
Use Scenario: Regulating power for MEMS inertial measurement units (IMUs) and environmental sensors in handheld medical devices. IC Role / Device Role / Timing Role: Dual-voltage LDO delivering 3.3V for MCU interface and 1.8V for low-power sensor sleep mode. Use Value: Dynamic MODE1→MODE2 transition reduces active power by 42% (V² dependence) without firmware overhead. |
| SD Memory Card Interface | Industrial Vision System |
Use Scenario: Providing stable 3.3V/1.8V dual-rail power to SDIO host controllers and NAND flash in embedded storage modules. IC Role / Device Role / Timing Role: LDO with POK/PORB outputs coordinating power-up sequence with SD card initialization protocol. Use Value: PORB's 10ms delay ensures SD controller reset release aligns with card VDD stabilization per SD Physical Layer Spec v8.0. |
Use Scenario: Powering FPGA-based image preprocessing pipelines in factory automation cameras operating in wide ambient temperature ranges. IC Role / Device Role / Timing Role: High-accuracy LDO with remote sensing (OUTS) compensating for PCB trace losses in 15cm interconnects. Use Value: ±1% regulation over -40°C to +125°C maintains FPGA core voltage within 3.3V ±33mV, avoiding timing violations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-noise dual-mode LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A9400RGRT | 4µVRMS noise, 1A, but single-output voltage (no MODE1/MODE2); no pass-through mode; only 2.5V–5.5V input. | Lacks dynamic voltage scaling and bypass functionality - suitable only for fixed-voltage, noise-sensitive loads. | Select when dual-voltage operation is unnecessary and board space favors 3mm × 3mm QFN over TDFN. |
| ADP1765ACPZ-3.3-R7 | 2.5µVRMS noise, 1.2A, but no programmable modes, no POK/PORB, no active discharge; 1.6V–3.6V input only. | Optimized for ultra-low-noise analog circuits only - cannot support voltage-scaling or system sequencing requirements. | Choose only for legacy designs requiring sub-4µVRMS noise at 3.3V fixed output with minimal feature set. |
Compared with TPS7A9400RGRT and ADP1765ACPZ-3.3-R7, the MAX38913AATD+T uniquely combines ultra-low noise, dual-mode voltage selection, pass-through bypass, and integrated sequencing signals - making it the sole option for applications requiring coordinated power-state transitions in compact, thermally constrained imaging systems.
Availability
MAX38913AATD+T is available at Aetrix Electronics and suitable for image sensor power, portable sensor hubs, SD memory card interfaces, industrial vision systems, and automotive camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX38913AATD+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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.
The MAX38913AATD+T belongs to Analog Devices' ultra-low-noise LDO family, designed specifically for powering noise-sensitive analog signal chains in imaging, sensing, and high-fidelity data acquisition systems.
FAQ
What is the maximum output capacitance supported by MAX38913AATD+T?
The MAX38913AATD+T has no maximum output capacitance limit for stability - it remains stable with up to 300µF output capacitors, as verified in the datasheet's active discharge specification. Larger values are permissible if thermal and inrush constraints allow, though 10µF is the recommended nominal value for optimal transient response and noise performance.
Does MAX38913AATD+T support remote sensing, and how is it implemented?
Yes, MAX38913AATD+T supports remote sensing via the OUTS pin (Pin 12). Connecting OUTS directly to the load side of the output trace enables the regulator to compensate for IR drop across PCB traces or connectors, maintaining ±1% accuracy at the point of load. This is essential for high-current or long-trace applications like industrial camera modules.
How does the BYP pin affect output voltage transitions in MAX38913AATD+T?
The BYP pin (Pin 4) sets the slew rate during output voltage transitions using the formula dV/dt = 50µA / CBYP. With a 47nF capacitor, the slew rate is ~1.06V/ms - controlling inrush current and preventing overshoot during MODE1↔MODE2 or regulation↔pass-through transitions. This avoids tripping current limits during large COUT charging.
Can MAX38913AATD+T operate without the POK and PORB pins connected?
Yes, MAX38913AATD+T operates fully in regulation, pass-through, and shutdown modes without connecting POK (Pin 6) or PORB (Pin 5). These pins are optional status outputs for system sequencing; leaving them unconnected (with no pullup) disables their function but does not impair core LDO operation or protection features.
What is the quiescent current of MAX38913AATD+T in pass-through mode?
In pass-through mode (EN2=HIGH, EN1=LOW), MAX38913AATD+T draws 115µA typical quiescent current - significantly lower than its 1.37mA regulation-mode IQ. This low IQ enables extended battery life in always-on sensor nodes while maintaining IN→OUT conduction and 2A current-limit protection.
MAX38913AATD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 1.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- -
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 2 mA
- Current - Supply (Max):
- -
- PSRR:
- 75dB ~ 50dB (1kHz ~ 1MHz)
- Control Features:
- Current Limit, Enable, Soft Start
- Protection Features:
- Over Current, Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TDFN (3x3)
MAX38913AATD+T FAQ
1.How can I place an order for MAX38913AATD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX38913AATD+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 MAX38913AATD+T reliable?
The price and inventory of MAX38913AATD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX38913AATD+T is usually 5 days.
3.What payment methods are accepted for MAX38913AATD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX38913AATD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX38913AATD+T?
MAX38913AATD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX38913AATD+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 MAX38913AATD+T?
For technical support, including MAX38913AATD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX38913AATD+T requirements.
6.How does Aetrix verify that MAX38913AATD+T is sourced from the original manufacturer or authorized distributors?
All MAX38913AATD+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 MAX38913AATD+T meets industry standards.
7.What is the process for return or replacement of MAX38913AATD+T?
All MAX38913AATD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX38913AATD+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 MAX38913AATD+T part is unused and in its original packaging.
Return procedure for MAX38913AATD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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