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Analog Devices Inc./Maxim Integrated MAX1819EBL33+T
- Part No.:
- MAX1819EBL33+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 6-UFBGA, CSPBGA
- Datasheet:
-
MAX1819EBL33+T.pdf
- Description:
- IC REG LIN POS ADJ 500MA 6UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
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Product details
Overview
MAX1819EBL33+T from Maxim Integrated is a 3.3V fixed-output, 500mA low-dropout linear regulator with ±1% initial output accuracy, 125µA ground current, and 90mV dropout at full load-designed for power management in space-constrained portable systems such as notebook computers and USB hubs.
For engineers reviewing the MAX1819EBL33+T datasheet, MAX1819EBL33+T pinout, MAX1819EBL33+T application, or MAX1819EBL33+T equivalent, this device offers guaranteed 500mA output, active-low open-drain POK monitoring, 0.1µA shutdown current, and UCSP package compatibility for high-density PCB layouts.
Technical Context
The MAX1819EBL33+T integrates a P-channel MOSFET pass transistor (RDS(ON) ≈ 0.25Ω) enabling ultra-low quiescent current independent of load, with internal 1.25V reference and error amplifier driving feedback via factory-trimmed resistive divider for fixed 3.3V output.
It features Dual Mode™ operation-SET pin grounded to select preset mode-and includes thermal shutdown at +170°C with 20°C hysteresis, short-circuit current limiting (1.0A typ), and a dedicated open-drain POK output asserting low when VOUT falls below 93% of nominal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% over -40°C to +85°C - ensures stable core logic supply without external resistor network. |
| Max Output Current | 500mA guaranteed - supports moderate-power peripherals like USB PHYs or memory interfaces. |
| Dropout Voltage | 90mV at 500mA - enables operation down to VIN = 3.39V, extending battery life in single-cell Li-ion systems. |
| Ground Current | 125µA typical at 500mA - minimizes standby power loss in always-on subsystems. |
| Shutdown Current | 0.1µA - allows deep-sleep modes in portable devices without compromising battery shelf life. |
| POK Threshold | 93% of nominal VOUT - provides early warning of regulation loss before system reset occurs. |
| Thermal Shutdown | +170°C with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
MAX1819EBL33+T is housed in a 6-pin UCSP (Ultra-Compact Silicon Package), measuring 1.5mm × 1.5mm × 0.6mm, with solder balls on bottom side for board-level mounting. Thermal performance is optimized when copper area is shared across IN, OUT, and GND pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (A1) | Input voltage supply | Accepts 2.5V–5.5V input; requires 1µF bypass capacitor to GND for stability and noise suppression. |
| POK (A2) | Open-drain power-OK indicator | Pulls low when VOUT < 93% of 3.3V; requires external 100kΩ pull-up to OUT for logic-level signaling. |
| SHDN (A3) | Active-low shutdown control | Drives regulator into 0.1µA sleep state when pulled low; tolerant up to 6V regardless of VIN/VOUT. |
| OUT (C1) | Regulated 3.3V output | Sources up to 500mA; requires 3.3µF low-ESR ceramic capacitor to GND for transient response and PSRR. |
| SET (C2) | Feedback selection input | Grounded to enable fixed 3.3V mode; floating or biased above 50mV disables preset mode per Dual Mode™ logic. |
| GND (C3) | Power and signal reference | Common return path for IN, OUT, SHDN, POK, and SET; critical for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ feedback selection | Automatic switch between factory-trimmed 3.3V output and adjustable mode based on SET pin voltage - eliminates BOM variants. |
| P-channel MOSFET pass element | 0.25Ω RDS(ON) enables 90mV dropout and eliminates base-drive current - reduces IQ by >50% vs. PNP-based LDOs. |
| Power-OK (POK) monitor | Open-drain output with 93% threshold - directly interfaces with µC reset inputs or status LEDs without level-shifting. |
| Thermal protection with hysteresis | +170°C trip point and 20°C cooldown gap - sustains pulsed operation during overload rather than latching off. |
| Low-noise output | 115µVRMS (10Hz–1MHz) with 3.3µF COUT - meets noise-sensitive analog rail requirements in mixed-signal SoCs. |
Applications
| Notebook Computers | USB Hubs |
|---|---|
Use Scenario: Powering 3.3V I/O rails for PCIe root complex, SATA controllers, and embedded controllers in thin-and-light notebooks. IC Role / Device Role / Timing Role: Primary 3.3V LDO delivering clean, regulated power with fast load-transient response to handle burst-mode data transfers. Use Value: 90mV dropout extends usable battery voltage range; 125µA ground current preserves runtime during display-off states. |
Use Scenario: Supplying 3.3V to USB 2.0 transceivers and hub controller logic in compact docking stations. IC Role / Device Role / Timing Role: Local point-of-load regulator ensuring stable VCC for USB PHY timing and packet integrity under dynamic load changes. Use Value: POK output synchronizes hub enumeration with power rail readiness; UCSP footprint saves space on dense hub PCBs. |
| Cellular Telephones | Base Stations |
Use Scenario: Providing 3.3V bias to RF front-end ICs and audio codecs in multi-band smartphones with tight thermal constraints. IC Role / Device Role / Timing Role: Low-noise, thermally robust LDO supporting sensitive analog sections without coupling switching noise from PMIC cores. Use Value: 115µVRMS noise and 80dB PSRR at 10kHz prevent AM modulation artifacts in receiver paths. |
Use Scenario: Powering 3.3V FPGA configuration banks and auxiliary control logic in remote radio units (RRUs). IC Role / Device Role / Timing Role: Secondary regulator decoupling FPGA I/O banks from noisy DC/DC converters while maintaining thermal margin. Use Value: Thermal shutdown with hysteresis prevents latch-up during ambient temperature spikes in outdoor enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B332MR-G | 3.3V fixed, 500mA, 150mV dropout at 500mA, SOT-25 package (2.9mm × 2.8mm) | Larger footprint and higher dropout reduce battery efficiency in portable designs | Choose when SOT-25 assembly infrastructure exists and UCSP reflow capability is unavailable. |
| Diodes Inc. AP2210K-3.3TRG1 | 3.3V fixed, 500mA, 250mV dropout at 500mA, SOT-23-5 package | Higher ground current (220µA typ) and no POK output limit use in power-monitoring systems | Prefer for cost-sensitive industrial controls where POK and ultra-low IQ are not required. |
Compared with MAX1819EBL33+T, the XC6219B332MR-G trades UCSP miniaturization and 90mV dropout for broader package availability, while the AP2210K-3.3TRG1 lacks POK and consumes >75% more quiescent current-making MAX1819EBL33+T optimal for battery-powered systems demanding size, efficiency, and power-good signaling.
Availability
MAX1819EBL33+T is available at Aetrix Electronics and suitable for notebook computers, USB hubs, cellular telephones, base stations, and docking stations requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1819EBL33+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX1819 belongs to Maxim's low-quiescent-current LDO family, engineered specifically for battery-operated portable electronics where dropout voltage, ground current, and package size directly impact runtime and form factor.
FAQ
What output voltage does the MAX1819EBL33+T deliver?
The MAX1819EBL33+T delivers a factory-trimmed fixed output voltage of 3.3V with ±1% initial accuracy over -40°C to +85°C. This value is confirmed in the Selector Guide and Electrical Characteristics table, where VOUT is specified as 3.3V (preset mode) with no external resistors required. The "33" suffix in MAX1819EBL33+T explicitly denotes the 3.3V variant.
Does the MAX1819EBL33+T include power-good monitoring?
Yes, the MAX1819EBL33+T includes an active-low, open-drain POK (power-OK) output that asserts low when the 3.3V output falls below 93% of nominal (i.e., <3.069V). As described in the Pin Description and Detailed Description sections, POK requires only a 100kΩ pull-up resistor to OUT to generate a logic-compatible signal for microcontroller reset or status indication.
What is the dropout voltage specification for the MAX1819EBL33+T at full load?
The MAX1819EBL33+T has a guaranteed dropout voltage of 90mV at 500mA load current, as stated in the Features list and confirmed in the Electrical Characteristics table under "Dropout Voltage (Note 3)". This low dropout enables operation with input voltages as low as 3.39V while maintaining regulation-critical for maximizing battery utilization in single-cell Li-ion systems.
How does the MAX1819EBL33+T achieve low quiescent current?
The MAX1819EBL33+T achieves 125µA typical ground current using an internal P-channel MOSFET pass transistor instead of a PNP bipolar device. Unlike PNP-based regulators, the PMOS architecture eliminates base-drive current and maintains constant IQ across load and dropout conditions-verified in the Ground-Pin Current vs. Load Current graph (toc02) and Electrical Characteristics table.
Is the MAX1819EBL33+T compatible with ceramic output capacitors?
Yes, the MAX1819EBL33+T is explicitly designed for use with low-ESR ceramic capacitors: the Applications Information section specifies a 3.3µF ceramic capacitor on the output (COUT) with ESR ≤ 0.1Ω for stability and optimal transient response. Ceramic capacitors are recommended due to their low ESR, small footprint, and compatibility with the UCSP package's high-density layout requirements.
MAX1819EBL33+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-UFBGA, CSPBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.25V (3.3V)
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.232V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 250 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UCSP (1.52x1.52)
MAX1819EBL33+T FAQ
1.How can I place an order for MAX1819EBL33+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1819EBL33+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 MAX1819EBL33+T reliable?
The price and inventory of MAX1819EBL33+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1819EBL33+T is usually 5 days.
3.What payment methods are accepted for MAX1819EBL33+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1819EBL33+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1819EBL33+T?
MAX1819EBL33+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1819EBL33+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 MAX1819EBL33+T?
For technical support, including MAX1819EBL33+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1819EBL33+T requirements.
6.How does Aetrix verify that MAX1819EBL33+T is sourced from the original manufacturer or authorized distributors?
All MAX1819EBL33+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 MAX1819EBL33+T meets industry standards.
7.What is the process for return or replacement of MAX1819EBL33+T?
All MAX1819EBL33+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1819EBL33+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 MAX1819EBL33+T part is unused and in its original packaging.
Return procedure for MAX1819EBL33+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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