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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 LINEAR 6UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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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. It features an active-low open-drain POK output, 0.1µA shutdown current, and thermal/short-circuit protection. Designed for space-constrained portable systems, it powers core logic rails in notebook computers and USB hubs.
For engineers reviewing the MAX1819EBL33-T datasheet, MAX1819EBL33-T pinout, MAX1819EBL33-T application, or MAX1819EBL33-T equivalent, key selection criteria include guaranteed 500mA output under 3.3V regulation, UCSP package thermal performance, POK threshold at 93% VOUT, and Dual Mode™ SET pin behavior for preset/adjustable configuration.
Technical Context
The MAX1819EBL33-T uses an internal P-channel MOSFET pass transistor (RDS(ON) ≈ 0.25Ω) to achieve low dropout and load-independent quiescent current. Its error amplifier compares a 1.25V reference against feedback from either internal resistors (for 3.3V preset) or an external divider connected to the SET pin.
Power-OK (POK) monitoring operates with 93% nominal VOUT threshold and hysteresis; shutdown disables OUT and forces POK low while drawing only 0.1µA. Thermal protection activates at +170°C with 20°C hysteresis, enabling pulsed operation during sustained overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% (initial accuracy over -40°C to +85°C) |
| Max Output Current | 500mA RMS guaranteed, with in-regulation current limit of 2A |
| Dropout Voltage | 90mV at 500mA load (enables operation down to VIN = 3.39V) |
| Ground Current | 125µA typical at 500mA load (independent of output load) |
| Shutdown Current | 0.1µA maximum (SHDN = GND, VIN = 5.5V) |
| POK Threshold | 93% of nominal VOUT (3.069V for 3.3V output), open-drain N-channel |
| Thermal Shutdown | Activates at +170°C junction temperature with 20°C hysteresis |
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 (A1–C3 layout). The package supports high-density PCB layouts and provides thermal dissipation via copper pad under die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (A1) | Input supply connection | Accepts 2.5V–5.5V input; requires 1µF bypass capacitor to GND for stability |
| POK (A2) | Open-drain power-OK indicator | Pulls low when VOUT < 3.069V; requires external 100kΩ pullup to OUT |
| SHDN (A3) | Active-low enable control | Logic low disables regulator and forces POK/OUT low; VIH ≥ 1.6V, VIL ≤ 0.6V |
| OUT (C1) | Regulated output terminal | Delivers up to 500mA; requires 3.3µF low-ESR capacitor to GND |
| SET (C2) | Feedback mode selector | Connected to GND for 3.3V preset mode; floating or resistor-divider enables adjustable mode |
| GND (C3) | Power and signal reference | Common return path for IN, OUT, SHDN, POK, and SET; critical for thermal conduction |
Key Features
| Feature | Design Value |
|---|---|
| Dual Mode™ voltage selection | Factory-trimmed 3.3V output or adjustable 1.25V–5V via external resistor divider on SET pin |
| Low-quiescent-current regulation | 125µA ground current maintained across full 0–500mA load range and in dropout |
| Integrated power-OK monitoring | Open-drain POK output asserts low below 93% of nominal VOUT without external components |
| Robust fault protection | Short-circuit current limit (0.55–2.5A), thermal shutdown (+170°C), and undervoltage lockout (2.0–2.3V) |
| Miniature UCSP packaging | 6-ball, 1.5mm × 1.5mm footprint enables ultra-compact designs in portable electronics |
Applications
| Notebook Computer Core Rail | USB Hub Power Management |
|---|---|
Use Scenario: Supplies 3.3V to USB controller ICs and PHY transceivers in compact laptop docking stations. IC Role / Device Role / Timing Role: Primary 3.3V LDO delivering stable rail with fast transient response to handle USB enumeration surges. Use Value: 90mV dropout extends battery life by enabling operation until VIN drops to 3.39V; POK signals µC when rail falls out of spec. |
Use Scenario: Powers downstream USB ports in bus-powered hubs where input voltage varies with host port capability. IC Role / Device Role / Timing Role: Fixed 3.3V regulator with integrated POK for system-level power sequencing and fault reporting. Use Value: 0.1µA shutdown current preserves host battery during suspend; thermal protection prevents failure during simultaneous port loading. |
| Cellular Phone Application Processor | Base Station RF Module Bias |
Use Scenario: Provides clean 3.3V supply to application processors in 3G/4G handsets operating from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-noise, low-IQ LDO supporting dynamic voltage scaling and deep-sleep modes. Use Value: 125µA ground current minimizes standby drain; ±1% accuracy ensures reliable processor boot and memory interface timing. |
Use Scenario: Delivers regulated 3.3V bias to low-noise amplifiers and mixer ICs in small-cell base station front-end modules. IC Role / Device Role / Timing Role: High-accuracy, thermally robust LDO maintaining stable bias under ambient temperature swings. Use Value: Thermal shutdown at +170°C protects RF circuitry during enclosure overheating; UCSP package aids heat transfer to PCB ground plane. |
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 |
|---|---|---|---|
| Texas Instruments TPS79633 | 3.3V fixed, 600mA output, 150mV dropout at 600mA, 180µA quiescent current, SOT-223 package | Larger footprint (SOT-223 vs UCSP), higher thermal resistance, no POK output | Choose for higher current margin and legacy board compatibility; avoid when POK signaling or space constraints are critical. |
| Analog Devices ADP1713AUJZ-3.3-R7 | 3.3V fixed, 300mA output, 170mV dropout at 300mA, 250µA quiescent current, TSOT-5 package | Lower max current, no POK output, different shutdown threshold (0.4V vs 0.6V), no Dual Mode™ flexibility | Choose for cost-sensitive, lower-current applications where POK and 500mA capability are not required. |
Compared with TPS79633 and ADP1713AUJZ-3.3-R7, the MAX1819EBL33-T uniquely combines 500mA output, 90mV dropout, integrated POK, and UCSP packaging-making it optimal for space- and battery-life-constrained portable designs requiring precise power-good signaling.
Availability
MAX1819EBL33-T is available at Aetrix Electronics and suitable for notebook computers, USB hubs, cellular telephones, and base stations requiring stable component supply, long-term lifecycle support, and traceable sourcing.
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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.
The MAX1819EBL33-T belongs to Maxim's low-dropout linear regulator product line, engineered specifically for battery-powered portable electronics needing high accuracy, ultra-low quiescent current, and miniature packaging.
FAQ
What is the guaranteed output voltage tolerance for MAX1819EBL33-T over temperature?
The MAX1819EBL33-T guarantees ±3% output voltage accuracy over the full -40°C to +85°C operating temperature range, with ±1% initial accuracy at +25°C. This specification applies under conditions of IOUT = 1mA to 500mA and VIN > VOUT + 0.5V. The tighter ±1% tolerance is measured at room temperature during production test, while the wider ±3% reflects worst-case drift across temperature and load.
Does MAX1819EBL33-T support adjustable output voltage, or is it fixed-only?
The MAX1819EBL33-T supports both fixed and adjustable operation via its Dual Mode™ architecture. With the SET pin tied to GND, it delivers the factory-trimmed 3.3V output. When SET is connected to an external resistor divider between OUT and GND, the device regulates to any voltage from 1.25V to 5V using the equation R1 = R2 × ((VOUT / 1.25V) − 1). The MAX1819EBL33-T data sheet confirms this dual functionality explicitly for the EBL33 suffix.
What is the minimum input voltage required for MAX1819EBL33-T to maintain regulation at 500mA load?
The minimum input voltage for MAX1819EBL33-T to maintain regulation at 500mA is 3.39V, calculated as VOUT + dropout = 3.3V + 0.09V. This 90mV dropout value is specified in the datasheet at 500mA load and +25°C. At higher temperatures or worst-case process corners, the guaranteed maximum dropout rises to 280mV (per Electrical Characteristics table), requiring VIN ≥ 3.58V for guaranteed 500mA operation across temperature.
How does the POK output behave during shutdown of MAX1819EBL33-T?
During shutdown (SHDN = GND), the MAX1819EBL33-T forces the POK output low regardless of the actual output voltage level. This behavior is explicitly documented in the Pin Description and Shutdown sections: "When in shutdown, POK and OUT pull low." The POK pin remains actively driven low-not high-impedance-ensuring unambiguous power-fail signaling to the host microcontroller even when the regulator is disabled.
What thermal derating applies to MAX1819EBL33-T in its UCSP package?
The MAX1819EBL33-T has a continuous power dissipation limit of 840mW at TA = +70°C, with derating of 10.5mW/°C above that temperature. This rating assumes mounting on a PCB with one square inch of copper area in still air. At +85°C ambient, the maximum allowable power drops to 682.5mW. For a 3.3V output delivering 500mA, the maximum sustainable input voltage is therefore limited to VIN ≤ VOUT + (PMAX / IOUT) = 3.3V + (0.6825W / 0.5A) = 4.665V to avoid thermal shutdown.
MAX1819EBL33-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-UFBGA, CSPBGA
- Packaging:
- Bulk
- 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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