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Analog Devices Inc./Maxim Integrated MAX8575EUT+T
- Part No.:
- MAX8575EUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- SOT-23-6
- Datasheet:
-
MAX8575EUT+T.pdf
- Description:
- IC REG CONV LCD 1OUT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,007
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Product details
Overview
The MAX8575EUT+T from Maxim Integrated is a fixed-output, high-efficiency LCD step-up DC-DC converter with 15V preset output, 500mA current limit, True Shutdown™ functionality, and operation from 2.7V to 5.5V input. It integrates internal n-channel and p-channel MOSFET switches, delivers up to 20mA at 20V from a single Li+ battery, and targets compact LCD bias generation in portable electronics.
For engineers reviewing the MAX8575EUT+T datasheet, MAX8575EUT+T pinout, MAX8575EUT+T application, or MAX8575EUT+T equivalent, this page provides verified technical context, confirmed pin functions, real-world load regulation performance (±0.1%/mA), safety feature behavior under fault conditions, and validated alternative options for 15V LCD boost applications.
Technical Context
The MAX8575EUT+T employs a minimum off-time, current-limited control scheme operating in discontinuous conduction mode. Its internal p-channel isolation switch disconnects the output from the input during True Shutdown, reducing supply current to 0.05µA (typ) and eliminating standby power draw.
It features built-in protection against common faults: open feedback resistors cause shutdown and resistive grounding of OUT; missing or reversed external diodes halt switching; and output shorts trigger soft-start-restart cycles limited by the pMOS current limit. The FB regulation voltage is fixed at 1.226V (±0.0123V over –40°C to +85°C), enabling precise 15V output via internal resistor network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 15V ±0.187V over –40°C to +85°C - ensures stable LCD VPOS bias without external feedback components. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li+ batteries and regulated 3.3V/5V rails. |
| Current Limit | 500mA (typ) - supports higher-power LCD panels requiring up to 20mA at 20V output. |
| Efficiency | 87% (typ) at 5mA load - minimizes thermal stress and extends battery life in portable devices. |
| Switching Frequency | Up to 800kHz - enables use of small 22μH–47μH surface-mount inductors and low-ESR ceramic capacitors. |
| Shutdown Current | 0.05µA (typ) - achieves ultra-low quiescent power in always-on portable systems. |
| Load Regulation | ±0.1%/mA - maintains tight output stability across varying LCD segment activation loads. |
Pinout & Package
MAX8575EUT+T is housed in a RoHS-compliant 6-pin SOT23 package (top mark ABTO), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and thermal pad omitted. Pin functions are validated per Maxim's official pin description and functional diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for LX, SW, and internal logic; must be connected to low-impedance system ground plane. |
| LX | Inductor switching node | Drain connection of internal n-channel MOSFET; carries pulsed current up to 500mA; requires short, low-inductance trace to inductor. |
| VCC | Power supply input | Accepts 2.7V–5.5V input; bypassed with 1µF ceramic capacitor to GND near the pin. |
| SHDN | Logic-controlled enable | Active-low input; drives <0.7V for shutdown, >1.4V for operation; tolerates up to 6V regardless of VCC. |
| SW | Isolation switch output | Drain of internal p-channel MOSFET; connects VCC to inductor during operation; left open if True Shutdown not required. |
| OUT | Regulated 15V output | Fixed 15V output node; internally connected to feedback divider; bypassed with 1µF ceramic capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ | Internal p-channel switch disconnects input from inductor during shutdown, reducing IQ to 0.05µA and preventing output hold-up. |
| Integrated 500mA Switch | Eliminates need for external high-current MOSFET; reduces BOM count and PCB area in space-constrained designs. |
| Robust Fault Protection | Automatically halts switching and resistively grounds OUT during open FB, missing diode, or reversed diode faults - protects downstream LCD drivers. |
| High Efficiency at Light Loads | 87% efficiency maintained at 1mA load due to low quiescent current (25µA) and optimized control architecture. |
| 15V Output Accuracy | ±0.187V tolerance over full temperature range ensures reliable LCD contrast control without calibration. |
Applications
| Small LCD Bias Generation | OLED Panel Power Supply |
|---|---|
|
Use Scenario: Powering monochrome STN/TN LCD modules in handheld terminals with 3–5V battery input. IC Role / Device Role / Timing Role: Generates stable 15V positive bias (VPOS) for LCD segment drive while maintaining low ripple under dynamic segment activation. Use Value: Delivers 20mA at 20V from a single Li+ cell, enabling direct integration without intermediate regulators or transformers. |
Use Scenario: Providing gate-source bias voltage for passive-matrix OLED displays in portable medical devices. IC Role / Device Role / Timing Role: Supplies regulated 15V rail to OLED anode driver ICs; True Shutdown eliminates leakage paths during display-off periods. Use Value: 0.05µA shutdown current extends battery runtime in intermittent-use diagnostic tools. |
| Cellular Phone Backlight Support | Industrial Handheld Display Power |
|
Use Scenario: Driving white LED strings or electroluminescent (EL) backlights in legacy GSM handsets with 3.6V nominal battery. IC Role / Device Role / Timing Role: Acts as primary boost stage feeding EL inverter or LED current source; handles 500mA peak inductor current during backlight ramp-up. Use Value: 800kHz switching frequency allows use of tiny 22μH inductors, reducing solution size below 12mm². |
Use Scenario: Powering segmented LCDs in ruggedized industrial PDAs operating in –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Provides temperature-stable 15V output with ±0.187V regulation error; integrated fault protection prevents field failures from ESD-induced diode damage. Use Value: Built-in open-FB and missing-diode detection avoids catastrophic overvoltage events that could destroy expensive display assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8573EUT+T | Same 6-pin SOT23 package and 15V fixed output, but 250mA current limit instead of 500mA. | Suitable for lower-current LCD panels (<10mA at 20V); less capable under transient load spikes. | Select when load current remains ≤10mA and board space or cost optimization is prioritized over headroom. |
| TPS61042DBVR | Fixed 15V output, 400mA current limit, 500kHz max switching frequency, no internal p-channel isolation switch. | Lacks True Shutdown - output remains coupled to input via inductor/diode during shutdown, causing residual load current. | Choose only if True Shutdown is unnecessary and 400mA peak current suffices; verify system-level leakage requirements. |
Compared with MAX8575EUT+T, MAX8573EUT+T offers identical pinout and regulation but reduced current capability, while TPS61042DBVR lacks critical isolation during shutdown - making MAX8575EUT+T the only option meeting both 500mA delivery and zero-load leakage requirements for battery-critical LCD bias.
Availability
MAX8575EUT+T is available at Aetrix Electronics and suitable for LCD bias generators, OLED panel power supplies, and industrial handheld display power requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for MAX8575EUT+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 portable, industrial, and communications applications.
The MAX8570 family-including MAX8575EUT+T-is designed specifically for compact, high-reliability LCD and OLED bias generation in battery-powered portable electronics, emphasizing low quiescent current, robust fault tolerance, and minimal external component count.
FAQ
What is the output voltage tolerance of the MAX8575EUT+T over temperature?
The MAX8575EUT+T delivers a fixed 15V output with ±0.187V tolerance across the full –40°C to +85°C operating range, corresponding to ±1.25% accuracy. This specification is guaranteed by design and verified in production testing, ensuring consistent LCD contrast performance without external trimming or calibration in the MAX8575EUT+T application.
Does the MAX8575EUT+T require external feedback resistors to set its output voltage?
No, the MAX8575EUT+T does not require external feedback resistors. It features an internal resistor divider that fixes the output voltage at 15V, as confirmed in the Selector Guide and Typical Application Circuit (Figure 3). External resistors are only needed for adjustable-output variants like MAX8570EUT+T or MAX8571EUT+T - not for the MAX8575EUT+T.
How does the True Shutdown™ feature of the MAX8575EUT+T reduce system power consumption?
The MAX8575EUT+T True Shutdown™ uses an internal p-channel MOSFET to physically disconnect the input supply from the inductor during shutdown, reducing supply current to 0.05µA (typ). Unlike conventional boost converters, this eliminates leakage through the inductor and output diode, ensuring zero static load on the battery - a critical advantage in always-on portable devices using the MAX8575EUT+T.
Can the MAX8575EUT+T drive a 20mA load at 20V from a 3.6V Li+ battery?
Yes, the MAX8575EUT+T is explicitly rated to supply up to 20mA at 20V from a single Li+ battery (2.7V–5.5V input), as stated in the General Description and confirmed by the 500mA current limit and 87% typical efficiency. This capability is validated under standard test conditions (VCC = 3.6V, 5mA load) and supported by efficiency vs. load curves in the MAX8575EUT+T datasheet.
What protection features does the MAX8575EUT+T provide against common circuit faults?
The MAX8575EUT+T includes fault protection for open feedback resistors (shuts down and grounds OUT), missing or reversed external diodes (halts switching), and output shorts (enters soft-start restart cycle). These behaviors are documented in Table 1 ("Protection Features") and prevent damage to both the MAX8575EUT+T and downstream LCD drivers - a key differentiator versus generic boost controllers.
MAX8575EUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Converter, LCD
- Voltage - Input:
- 2.7V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 15V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX8575EUT+T FAQ
1.How can I place an order for MAX8575EUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8575EUT+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 MAX8575EUT+T reliable?
The price and inventory of MAX8575EUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8575EUT+T is usually 5 days.
3.What payment methods are accepted for MAX8575EUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8575EUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8575EUT+T?
MAX8575EUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8575EUT+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 MAX8575EUT+T?
For technical support, including MAX8575EUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8575EUT+T requirements.
6.How does Aetrix verify that MAX8575EUT+T is sourced from the original manufacturer or authorized distributors?
All MAX8575EUT+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 MAX8575EUT+T meets industry standards.
7.What is the process for return or replacement of MAX8575EUT+T?
All MAX8575EUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX8575EUT+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 MAX8575EUT+T part is unused and in its original packaging.
Return procedure for MAX8575EUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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