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Analog Devices Inc./Maxim Integrated MAX8575EUT+
- Part No.:
- MAX8575EUT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- -
- Datasheet:
-
MAX8575EUT+.pdf
- Description:
- IC REG CONV LCD SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,364
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Product details
Overview
The MAX8575EUT+ from Maxim Integrated is a fixed-output 15V, 500mA current-limit LCD step-up DC-DC converter in a 6-pin SOT23 package, operating from 2.7V to 5.5V input and delivering up to 20mA at 20V - optimized for biasing small LCD panels in portable electronics.
For engineers reviewing the MAX8575EUT+ datasheet, MAX8575EUT+ pinout, MAX8575EUT+ application, or MAX8575EUT+ equivalent, this page provides verified functional context, confirmed pin roles, real-world efficiency data (87% typical), True Shutdown™ operation (0.05µA shutdown current), and validated alternative options for 15V LCD boost applications.
Technical Context
This device implements a minimum off-time, current-limited control scheme in discontinuous conduction mode, using an internal n-channel switch and a p-channel output isolation switch. Its fixed 15V output is regulated via internal feedback with ±0.187V accuracy over –40°C to +85°C.
The MAX8575EUT+ integrates True Shutdown™, which disconnects the output from the input via the internal p-channel switch during shutdown, reducing supply current to 0.05µA (typ) and eliminating reverse current draw - unlike conventional boost converters where the output remains coupled through the inductor and diode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15V ±0.187V (–40°C to +85°C); eliminates external resistor divider and associated tolerance/temperature drift. |
| Current Limit | 500mA (typ); supports higher-power LCD bias loads up to 20mA at 20V from a single Li+ cell. |
| Input Voltage Range | 2.7V to 5.5V; compatible with Li+ battery discharge profile and regulated 3.3V/5V rails. |
| Shutdown Current | 0.05µA (typ); enables ultra-low-power standby in battery-critical handheld devices. |
| Switching Frequency | Up to 800kHz; allows use of compact 22µH–47µH surface-mount inductors and low-ESR ceramic capacitors. |
| Efficiency | 87% (typ) at 5mA load; minimizes thermal rise and extends battery life in space-constrained designs. |
| FB Regulation Voltage | 1.226V (typ); internal reference used only for adjustable variants - not active in MAX8575EUT+, but defines family architecture. |
Pinout & Package
Package: 6-pin SOT23 (U6SN+1), RoHS-compliant, lead-free, footprint-compatible with industry-standard SOT-23-6 layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for power and control circuits; must be low-impedance connection to minimize noise and ground bounce. |
| LX | Inductor switching node | Connection to inductor's SW side; carries high di/dt current pulses; requires shortest possible PCB trace to reduce EMI and voltage spikes. |
| VCC | Input power supply | 2.7V–5.5V input; bypassed with 1µF ceramic capacitor directly to GND for stable operation and transient response. |
| SHDN | Logic-controlled enable | Active-low shutdown input; accepts logic levels up to 6V; pulls internal p-channel switch open to isolate output during shutdown. |
| SW | Isolation switch output | Drain of internal p-channel MOSFET; connects VCC to inductor during operation; left unconnected if True Shutdown not required (not recommended for MAX8575EUT+). |
| OUT | Regulated 15V output | Fixed 15V output terminal; requires 1µF ceramic capacitor to GND; internally pulled to GND via 7.5MΩ resistor in shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | 0.05µA shutdown current with full output isolation - prevents battery drain and unintended downstream power-up in sleep modes. |
| Integrated p-channel isolation switch | Eliminates need for external high-voltage PMOS or diode in series with output, reducing BOM count and board area. |
| Robust fault protection | Self-protects against missing output capacitor, open/shorted feedback resistors, reversed diode, and output short - avoids catastrophic failure in field-deployed units. |
| High-frequency operation (up to 800kHz) | Enables use of miniature 22µH inductors and 0603/0805 ceramic caps, supporting ultra-thin handheld form factors. |
| 15V fixed output with tight regulation | ±0.187V tolerance over temperature ensures reliable LCD segment contrast and lifetime without calibration overhead. |
Applications
| LCD Bias Generators | Polymer LEDs (OLED) |
|---|---|
Use Scenario: Powering VPOS and VNEG rails for monochrome STN/TN LCD modules in handheld organizers and PDAs. IC Role / Device Role / Timing Role: Primary 15V positive bias generator; used with external charge-pump diodes/caps to derive negative bias. Use Value: Delivers stable 15V at 5–10mA with <0.2% load regulation, ensuring consistent display contrast across battery discharge. | Use Scenario: Supplying gate drive voltage for passive-matrix OLED displays in early-generation smartwatches and medical diagnostic tools. IC Role / Device Role / Timing Role: High-efficiency 15V rail generator for OLED anode bias; paired with low-leakage Schottky diodes. Use Value: 87% efficiency at 3.6V input/5mA load reduces thermal stress on OLED driver ICs and extends display lifetime. |
| Cellular or Cordless Phones | Palmtop Computers |
Use Scenario: Generating backlight and contrast control voltages in dual-display clamshell phones with integrated PDA functionality. IC Role / Device Role / Timing Role: Secondary power rail generator for LCD interface ICs; activated only during display-on states. Use Value: True Shutdown™ cuts quiescent current to 50nA, enabling >72-hour standby without display-related battery drain. | Use Scenario: Providing regulated 15V for LCD controller bias in legacy Windows CE-based palmtops with VGA-resolution screens. IC Role / Device Role / Timing Role: Fixed-output boost stage upstream of programmable gamma-correction DACs. Use Value: Tight ±0.187V output tolerance maintains factory-calibrated grayscale linearity across 0–85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD boost applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8573EUT+T | Same 6-pin SOT23 package and 15V fixed output, but 250mA current limit (vs. 500mA). | Suitable for lower-current LCDs (<10mA at 15V); less headroom for peak loads or aging displays. | Select when power budget is constrained and load current remains ≤8mA; offers lower cost and identical layout. |
| TPS61042DBVR | 15V fixed output, 400mA current limit, 1.2MHz switching frequency, different pinout (5-pin SOT23). | Requires PCB redesign; lacks True Shutdown™ (1µA shutdown vs. 0.05µA); no integrated p-channel isolation switch. | Choose only if higher switching frequency justifies layout change and 0.05µA shutdown is not required. |
Compared with MAX8573EUT+T, the MAX8575EUT+ provides double the current limit for driving aging or high-contrast LCDs without derating; versus TPS61042DBVR, it delivers superior shutdown isolation and lower quiescent current, but requires no layout change when replacing other MAX857x SOT23 variants.
Availability
MAX8575EUT+ is available at Aetrix Electronics and suitable for LCD bias generators, OLED panel drivers, and portable communication device power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX8575EUT+ 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 MAX8570 family was designed specifically for compact, battery-powered LCD bias generation - prioritizing ultra-low shutdown current, integrated fault protection, and minimal external component count in sub-3mm² footprints.
FAQ
What is the output voltage tolerance of the MAX8575EUT+ over temperature?
The MAX8575EUT+ delivers a fixed 15V output with ±0.187V regulation tolerance over the full –40°C to +85°C operating range, corresponding to ±1.25% accuracy. This specification is guaranteed by design and tested per the Electrical Characteristics table in the datasheet, ensuring stable LCD bias performance without external trimming.
Does the MAX8575EUT+ require an external feedback resistor network?
No, the MAX8575EUT+ does not require an external feedback resistor network. Unlike the adjustable MAX8570/MAX8571/MAX8574 variants, the MAX8575EUT+ has an internally trimmed 15V output. The FB pin is not connected internally; instead, the OUT pin provides the regulated 15V directly, simplifying layout and improving accuracy.
What is the maximum continuous output current the MAX8575EUT+ can deliver at 15V?
The MAX8575EUT+ supports up to 20mA at 20V from a single Li+ battery, but its practical continuous output current at 15V depends on input voltage and thermal conditions. With 3.6V input and proper PCB layout, it reliably delivers ≥15mA at 15V while maintaining 87% efficiency and staying within thermal limits - verified in Typical Operating Characteristics Figure toc04.
How does True Shutdown™ work in the MAX8575EUT+ and what is its benefit?
True Shutdown™ in the MAX8575EUT+ activates an internal p-channel MOSFET that disconnects the output from the input supply when SHDN is pulled low. This reduces supply current to 0.05µA (typ) and prevents reverse current flow through the inductor and diode. The benefit is zero-load battery drain during standby - critical for multi-week shelf life in portable medical and industrial handhelds using the MAX8575EUT+.
Can the MAX8575EUT+ be used to generate a negative output voltage?
Yes, the MAX8575EUT+ can generate a negative output voltage when used with an external diode-capacitor charge pump (as shown in Figure 5 of the datasheet). In this configuration, the negative rail magnitude is approximately 15V minus one Schottky diode forward drop (~0.3V), yielding ~–14.7V. Preloading the positive output with ~200µA ensures stable negative voltage under light loads.
MAX8575EUT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Product Status:
- Active
- Applications:
- -
- Voltage - Input:
- -
- Number of Outputs:
- -
- Voltage - Output:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX8575EUT+ FAQ
1.How can I place an order for MAX8575EUT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8575EUT+ 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 MAX8575EUT+ reliable?
The price and inventory of MAX8575EUT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8575EUT+ is usually 5 days.
3.What payment methods are accepted for MAX8575EUT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8575EUT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8575EUT+?
MAX8575EUT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8575EUT+ 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 MAX8575EUT+?
For technical support, including MAX8575EUT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8575EUT+ requirements.
6.How does Aetrix verify that MAX8575EUT+ is sourced from the original manufacturer or authorized distributors?
All MAX8575EUT+ 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 MAX8575EUT+ meets industry standards.
7.What is the process for return or replacement of MAX8575EUT+?
All MAX8575EUT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX8575EUT+, 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 MAX8575EUT+ part is unused and in its original packaging.
Return procedure for MAX8575EUT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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