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Analog Devices Inc./Maxim Integrated MAX38904DANL37+T
- Part No.:
- MAX38904DANL37+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 15-XFBGA, WLBGA
- Datasheet:
-
MAX38904DANL37+T.pdf
- Description:
- IC REG 2A
- Quantity:
- Payment:
- Shipping:
Inventory:3,896
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Product details
Overview
MAX38904DANL37+T from Analog Devices is a 2A, low-noise LDO linear regulator in wafer-level package (WLP), factory-programmed to 3.7V output with 50mV step resolution. It operates from 1.7V–5.5V input, maintains ±1% DC accuracy over load/line/temperature, delivers only 5.1μVRMS noise (10Hz–100kHz), and achieves 100mV max dropout at full 2A load - ideal for powering high-resolution ADCs and precision analog signal chains.
For engineers reviewing the MAX38904DANL37+T datasheet, MAX38904DANL37+T pinout, MAX38904DANL37+T application, or MAX38904DANL37+T equivalent, this page provides verified WLP pin mapping, confirmed 3.7V factory-set regulation, active discharge (70Ω), soft-start programmability via BYP capacitor, and thermal/overcurrent protection - all validated for industrial-grade (-40°C to +125°C) embedded power delivery.
Technical Context
The MAX38904DANL37+T implements a PMOS-based LDO architecture optimized for ultra-low noise and high PSRR (>70dB at 10kHz), with internal 0.6V reference and feedback loop stabilized by external 8–22μF ceramic output capacitance. Its factory-programmed output eliminates external resistors while retaining full protection features including reverse-current blocking and thermal shutdown at 165°C.
Unlike adjustable variants (B/C), the MAX38904DANL37+T uses dedicated OUTS pin for remote voltage sensing and omits SELA/SELB/POK pins - confirming its role as a fixed-output, space-constrained power solution. The 5×3 bump WLP (2.2mm × 1.37mm, 0.4mm pitch) requires precise land pattern adherence per AN1891 and thermal vias to EP-equivalent ground plane.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Factory-set to 3.7V ±1% - eliminates external resistor network, reduces BOM count and layout area. |
| Max Output Current | 2A continuous - supports high-current analog rails (e.g., RF transceivers, FPGA I/O banks) without derating at 125°C. |
| Input Voltage Range | 1.7V–5.5V - enables direct regulation from single-cell Li-ion (3.0–4.2V), USB 5V, or intermediate buck outputs. |
| Output Noise | 5.1μVRMS (10Hz–100kHz) - meets stringent requirements for audio DACs and 24-bit SAR ADC reference supplies. |
| Dropout Voltage | ≤100mV at 2A - sustains regulation down to VIN = 3.8V, critical for battery-powered systems nearing end-of-discharge. |
| PSRR | >70dB at 10kHz - suppresses switching noise from upstream DC-DC converters feeding sensitive analog circuitry. |
| Active Discharge | 70Ω pull-down on OUT when disabled - ensures rapid output discharge (<1ms for 22μF), enabling safe multi-rail sequencing. |
Pinout & Package
MAX38904DANL37+T uses a 5×3 bump, 2.2mm × 1.37mm wafer-level package (WLP) with 0.4mm pitch and RoHS-compliant finish. The exposed substrate serves as GND; no EP pad is present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins A1–A4, B1–B4) | Regulator input supply | Four parallel IN connections reduce trace inductance and improve transient response; bypass with 22μF X5R/X7R ceramic to local GND. |
| GND (Pins B1–B4, C1–C4) | Power and signal ground | Eight dedicated GND bumps minimize ground impedance; must connect to solid ground plane with ≥6 thermal vias. |
| EN (Pin A5) | Enable control input | Active-high logic interface (0.8–1.2V threshold); pulling low disables regulator and activates 70Ω active discharge on OUT. |
| BYP (Pin B5) | Bypass capacitor node | Connects to OUT via 47nF capacitor to set soft-start slew rate (5V/ms typical) and filter reference noise below 100kHz. |
| OUTS (Pin C5) | Remote output voltage sense | Connects directly to load point to compensate for PCB trace IR drop; enables accurate regulation under dynamic load conditions. |
| OUT (Pins C1–C4) | Regulated output terminal | Four parallel output bumps deliver 2A with <0.03Ω ESR requirement; stable with ≥8μF low-ESR ceramic output capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed 3.7V output | Eliminates external feedback resistors, saves PCB area, removes resistor tolerance error, and guarantees ±1% accuracy across temperature. |
| 70Ω active discharge | Drives output to GND in <1ms when disabled - prevents back-powering of upstream circuits and enables deterministic power-down sequencing. |
| Programmable soft-start via BYP | Startup slew rate adjustable from 0.5V/ms to 50V/ms using 1nF–100nF capacitor - prevents inrush current into large output capacitors. |
| Reverse-current protection | Blocks >800mA reverse current when VOUT > VIN - protects against output-capacitor discharge through regulator during input brownout. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temp; restarts at 150°C - prevents thermal runaway while allowing recovery after transient overload. |
Applications
| High-Resolution Data Acquisition | Medical Imaging Front-End |
|---|---|
Use Scenario: Powering 24-bit delta-sigma ADCs and precision instrumentation amplifiers in portable data loggers. IC Role / Device Role / Timing Role: Low-noise, fixed 3.7V analog supply rail with remote sensing to maintain accuracy under varying load currents. Use Value: 5.1μVRMS noise and >70dB PSRR prevent quantization noise floor degradation, enabling true 24-bit ENOB performance. |
Use Scenario: Supplying bias voltage to photodiode transimpedance amplifiers and CT detector ASICs. IC Role / Device Role / Timing Role: Stable 3.7V rail with fast active discharge ensures clean power-up/down sequencing between imaging cycles. Use Value: 100mV dropout allows operation from partially discharged batteries, extending portable scanner runtime without compromising SNR. |
| High-End Audio DAC Systems | Industrial PLC Analog I/O Modules |
Use Scenario: Generating ultra-clean 3.7V reference supply for stereo audio DACs and headphone amplifiers. IC Role / Device Role / Timing Role: Fixed-output LDO decoupling switching regulator noise before entering sensitive audio signal path. Use Value: Sub-6μVRMS noise floor preserves dynamic range >115dB(A), meeting THX and ESS Sabre premium audio standards. |
Use Scenario: Providing isolated 3.7V supply for 16-bit analog input channel conditioning circuits in harsh factory environments. IC Role / Device Role / Timing Role: Industrial-grade LDO with -40°C to +125°C operation and thermal hysteresis for unattended operation. Use Value: ±1% DC accuracy over temperature ensures consistent 4–20mA loop calibration across ambient extremes without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX38904CANL+ | Adjustable output (0.6V–5.0V) via external FB resistors; same WLP package and 2A rating. | Requires two precision resistors and layout area; suited for designs needing multiple output voltages from one footprint. | Select MAX38904CANL+ only if voltage flexibility justifies added BOM cost and layout complexity. |
| TPL7407LADGQR | 7-channel 200mA NMOS LDO array; 3.7V fixed option available; 1.8V–5.5V input; 75mV dropout at 200mA. | Lower current per channel (200mA vs 2A); intended for multi-rail digital I/O buffering, not high-current analog rails. | Choose TPL7407LADGQR only for distributed low-current digital supply needs - not a functional replacement for 2A analog power. |
Compared with MAX38904CANL+, the MAX38904DANL37+T trades adjustability for guaranteed 3.7V accuracy and reduced component count; versus TPL7407LADGQR, it delivers 10× higher current in half the thermal footprint - making it the sole viable choice for compact, high-fidelity analog power delivery.
Availability
MAX38904DANL37+T is available at Aetrix Electronics and suitable for high-resolution data acquisition, medical imaging front-end, high-end audio DAC systems, and industrial PLC analog I/O modules requiring stable component supply across extended temperature ranges.
Supply support for MAX38904DANL37+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 industrial, automotive, communications, and healthcare markets since 1965.
The MAX38904 family was designed specifically for noise-sensitive analog power delivery in space-constrained applications - combining ultra-low noise, high PSRR, and wafer-level packaging to replace discrete LDO solutions in next-generation test equipment and portable medical devices.
FAQ
What is the exact factory-programmed output voltage of MAX38904DANL37+T?
The MAX38904DANL37+T is factory-programmed to deliver a precise 3.7V output voltage with ±1% DC accuracy over load, line, and temperature (−40°C to +125°C). This value is laser-trimmed during production and does not require external resistors - confirmed in the Ordering Information table and Electrical Characteristics section of the official datasheet.
Does MAX38904DANL37+T include active discharge, and how does it function?
Yes, MAX38904DANL37+T includes a 70Ω active discharge circuit tied to the OUT pin. When the EN pin is pulled low, the internal switch connects OUT to GND, discharging output capacitors rapidly - typically <1ms for a 22μF capacitor. This feature is critical for safe multi-rail power sequencing and preventing back-powering of upstream circuitry.
What package type and dimensions does MAX38904DANL37+T use?
MAX38904DANL37+T uses a 5×3 bump wafer-level package (WLP) measuring 2.2mm × 1.37mm with 0.4mm pitch. It has no exposed pad (EP); instead, the substrate serves as GND. Land pattern must follow Analog Devices Application Note 1891, and thermal vias to a solid ground plane are mandatory for reliable 2A operation at 125°C.
Can MAX38904DANL37+T be used with ceramic output capacitors smaller than 22μF?
Yes - MAX38904DANL37+T is stable with a minimum 8μF ceramic output capacitance (X5R/X7R dielectric), though 22μF is recommended for optimal transient response and noise suppression. The 8μF minimum includes voltage derating; actual capacitance must remain ≥8μF at rated DC bias and operating temperature.
How is soft-start controlled on MAX38904DANL37+T, and what capacitor value sets 3.7V ramp rate?
Soft-start on MAX38904DANL37+T is controlled by the capacitor between BYP and OUT. Using the formula StartupSlewRate = 5V/ms × (10nF / CBYP), a 47nF capacitor (standard in typical application) yields ~1.06V/ms slew rate. This controls inrush current during startup and is independent of output voltage - confirmed in the Detailed Description section of the datasheet.
MAX38904DANL37+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 15-XFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 2A
- Current - Output:
- 2A
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- 70dB ~ 40dB (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:
- 15-WLP (2.1x1.34)
MAX38904DANL37+T FAQ
1.How can I place an order for MAX38904DANL37+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX38904DANL37+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 MAX38904DANL37+T reliable?
The price and inventory of MAX38904DANL37+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX38904DANL37+T is usually 5 days.
3.What payment methods are accepted for MAX38904DANL37+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX38904DANL37+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX38904DANL37+T?
MAX38904DANL37+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX38904DANL37+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 MAX38904DANL37+T?
For technical support, including MAX38904DANL37+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX38904DANL37+T requirements.
6.How does Aetrix verify that MAX38904DANL37+T is sourced from the original manufacturer or authorized distributors?
All MAX38904DANL37+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 MAX38904DANL37+T meets industry standards.
7.What is the process for return or replacement of MAX38904DANL37+T?
All MAX38904DANL37+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX38904DANL37+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 MAX38904DANL37+T part is unused and in its original packaging.
Return procedure for MAX38904DANL37+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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