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Analog Devices Inc./Maxim Integrated MAX1518ETJ+T
- Part No.:
- MAX1518ETJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
MAX1518ETJ+T.pdf
- Description:
- IC REG CONV TFT LCD 1OUT 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,567
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Product details
Overview
The MAX1518ETJ+T from Maxim Integrated is a TFT-LCD power management IC integrating a 1.2MHz step-up DC-DC converter (VMAIN up to 13V), dual linear-regulator controllers (VGON/VGOFF), five rail-to-rail op-amps (±150mA, 13V/µs, 12MHz), and a logic-controlled high-voltage switch with adjustable delay-designed for notebook and automotive LCD panel power systems.
For engineers reviewing the MAX1518ETJ+T datasheet, MAX1518ETJ+T pinout, MAX1518ETJ+T application, or MAX1518ETJ+T equivalent, this device delivers tightly regulated gate-on (+24V) and gate-off (–8V) supplies, fast transient response to pulsed source-driver loads, and integrated VCOM/gamma-amplifier drive capability in a space-constrained 32-pin thin QFN package.
Technical Context
The MAX1518ETJ+T implements a current-mode PWM step-up regulator with internal 14V/2.4A n-channel MOSFET, enabling ultra-small inductor and ceramic capacitor usage. Its 1.2MHz fixed-frequency operation ensures minimal EMI and supports <0.8mm panel thickness requirements.
It integrates two independent linear-regulator controllers: REG P (FBP feedback, DRVP open-drain sink) for positive gate-on voltage generation, and REG N (FBN feedback, DRVN open-drain source) for negative gate-off voltage generation-both featuring soft-start, fault latching, and thermal protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.6V to 5.5V - compatible with single-cell Li-ion or 3.3V/5V system rails |
| Main Output (VMAIN) | Up to 13V at >500mA - powers TFT source drivers with >85% efficiency |
| Gate-On Controller (VGON) | Regulated +24V at 20mA - drives external pnp pass transistor via DRVP sink |
| Gate-Off Controller (VGOFF) | Regulated –8V at 50mA - drives external npn pass transistor via DRVN source |
| Op-Amp Count & Performance | 5 rail-to-rail op-amps: ±150mA short-circuit current, 13V/µs slew rate, 12MHz bandwidth - suitable for VCOM buffering and gamma correction |
| Switching Frequency | 1.2MHz (1020–1380kHz range) - enables use of 3µH inductors and low-ESR ceramic caps |
| Package | 32-pin thin QFN (5mm × 5mm, 0.8mm max height) - optimized for ultra-thin LCD panels |
Pinout & Package
MAX1518ETJ+T is housed in a 32-pin thin QFN package (5mm × 5mm, 0.8mm max thickness) with exposed thermal pad. Pin functions are validated per Maxim's datasheet Rev 0 (April 2004), Figure 2 and Pin Description tables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 22) | Main supply input | Accepts 2.6V–5.5V input; feeds step-up controller and internal bias rails |
| LX (Pin 21) | Switching node | Drain of internal 14V/2.4A n-MOSFET; connects to inductor and Schottky diode |
| FB (Pin 23) | Main output feedback | Senses VMAIN via resistor divider; regulates to 1.236V reference (±1.5% accuracy) |
| DRVP (Pin 26) | GATE-ON base drive | Open-drain n-channel output sinking ≥1mA; controls external pnp pass transistor |
| DRVN (Pin 28) | GATE-OFF base drive | Open-drain p-channel output sourcing ≥1mA; controls external npn pass transistor |
| OUT1–OUT5 (Pins 5,13,17,20) | Op-amp outputs | Five independent outputs supporting ±150mA continuous drive into capacitive loads |
| SRC / DRN / COM (Pins 1,31,32) | High-voltage switch terminals | Enable logic-controlled selection between SRC and DRN paths via CTL/DEL timing |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5-op-amp array | Enables full VCOM buffering + 4-channel gamma correction without external amplifiers |
| 1.2MHz current-mode regulation | Delivers fast load-transient response (<10µs recovery) for pulsed source-driver currents |
| Dual linear-regulator controllers | Supports independent +24V VGON and –8V VGOFF generation using external bipolar pass transistors |
| Adjustable high-voltage switch delay | Capacitor-programmable DEL pin sets startup sequencing between VMAIN, VGON, and VGOFF |
| Rail-to-rail I/O op-amps | Maximizes dynamic range across 4.5V–13V SUP rail; eliminates headroom loss in gamma string drive |
| Timer-delay fault latch | Locks out all regulators after 55ms overload, preventing thermal runaway during panel faults |
Applications
| Automotive Instrument Cluster Displays | Notebook Computer LCD Panels |
|---|---|
|
Use Scenario: Driving 7–12-inch TFT-LCDs in vehicle dashboards with wide temperature (-40°C to +100°C) and EMC constraints. IC Role / Device Role / Timing Role: Generates VMAIN (13V), VGON (+24V), VGOFF (–8V), and buffers VCOM/gamma voltages-all from a single 3.3V/5V supply. Use Value: Eliminates discrete DC-DC + LDO + op-amp solution, reducing BOM count by ≥12 components and PCB area by >35%. |
Use Scenario: Powering high-resolution 14–17-inch notebook LCD panels requiring precise gate timing and low-noise VCOM. IC Role / Device Role / Timing Role: Provides sequenced power-up (VMAIN → VGON → VGOFF) via DEL capacitor and drives gamma correction string with five matched op-amps. Use Value: Achieves <±5mV gamma voltage matching across channels and <100ns inter-channel skew for flicker-free display operation. |
| Industrial Panel PCs | Medical Diagnostic Monitors |
|
Use Scenario: Supporting ruggedized 10–15-inch touch-enabled displays in factory automation HMI systems. IC Role / Device Role / Timing Role: Delivers stable VMAIN under pulsed 500mA loads and maintains VGON/VGOFF regulation during ESD events via built-in fault latching. Use Value: Enables >99.9% uptime with no field failures due to gate-driver supply collapse during transient load spikes. |
Use Scenario: Powering critical 19–24-inch diagnostic-grade LCDs where grayscale fidelity and VCOM stability directly impact clinical interpretation. IC Role / Device Role / Timing Role: Supplies ultra-low-noise VCOM (via OP1 buffer) and precision gamma voltages (OP2–OP5) with rail-to-rail swing and 12MHz bandwidth. Use Value: Reduces grayscale banding by >40% versus discrete op-amp solutions due to matched gain/phase response across all five amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TFT-LCD power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1517ETJ+T | Three op-amps instead of five; identical step-up, VGON/VGOFF, and switch control blocks | Reduced gamma channel count (3 vs. 5); insufficient for 8-bit+ gamma strings requiring ≥5 taps | Select when driving 6-bit panels or where VCOM + two gamma taps suffice |
| TPS65105RGZR | TI part with integrated charge pumps (no external pass transistors); only two op-amps; 1.1MHz switching | No external transistor flexibility for VGON/VGOFF; limited op-amp drive (±50mA); different sequencing architecture | Choose for simplified layout where external transistor optimization is unnecessary and lower op-amp count is acceptable |
Compared with MAX1517ETJ+T and TPS65105RGZR, the MAX1518ETJ+T uniquely provides five high-current op-amps in a thermally robust QFN package while retaining full external pass-transistor control for customizable gate voltage levels and fault resilience.
Availability
MAX1518ETJ+T is available at Aetrix Electronics and suitable for notebook computer displays, automotive instrument clusters, and industrial panel PCs requiring stable component supply and long-term lifecycle support.
Supply support for MAX1518ETJ+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 and mixed-signal ICs for power, sensing, and interface applications in demanding environments.
The MAX1516/MAX1517/MAX1518 family was engineered specifically for active-matrix TFT-LCD panel power systems-integrating step-up conversion, gate driver control, and gamma/VCOM amplification in one ultra-thin package.
FAQ
What is the maximum output voltage of the main step-up regulator in MAX1518ETJ+T?
The MAX1518ETJ+T main step-up regulator supports an output voltage (VMAIN) up to 13V, set via external resistor divider on the FB pin. For outputs exceeding 13V, an external cascoded MOSFET is required per the datasheet's Design Procedures section. The internal 14V-rated n-channel MOSFET limits safe operation to ≤13V without additional circuitry.
How many operational amplifiers does the MAX1518ETJ+T integrate, and what are their key drive capabilities?
The MAX1518ETJ+T integrates five high-performance operational amplifiers. Each delivers ±150mA short-circuit current, 13V/µs slew rate, and 12MHz –3dB bandwidth, with rail-to-rail input and output stages. These op-amps are explicitly designed to drive LCD VCOM backplanes and multi-tap gamma-correction resistor strings without external buffering.
Can the MAX1518ETJ+T generate both positive and negative gate-driver voltages?
Yes. The MAX1518ETJ+T includes two dedicated linear-regulator controllers: REG P (via FBP/DRVP) generates positive gate-on voltage (e.g., +24V), and REG N (via FBN/DRVN) generates negative gate-off voltage (e.g., –8V). Both use external bipolar pass transistors and feature independent soft-start, fault latching, and thermal protection.
What package type and dimensions does the MAX1518ETJ+T use?
The MAX1518ETJ+T is supplied in a 32-pin thin QFN package measuring 5mm × 5mm with a maximum height of 0.8mm. It features an exposed thermal pad for enhanced heat dissipation and is rated for operation from –40°C to +100°C ambient temperature.
Does the MAX1518ETJ+T include built-in protection features?
Yes. The MAX1518ETJ+T incorporates timer-delay fault latching (triggers after 55ms overload), thermal-overload protection (shuts down above +150°C junction), undervoltage lockout (2.5V threshold), and individual regulator fault detection on VMAIN, VGON, and VGOFF outputs-ensuring robust operation in mission-critical LCD systems.
MAX1518ETJ+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Converter, TFT LCD
- Voltage - Input:
- 2.6V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 2.6V ~ 13V
- Operating Temperature:
- -40°C ~ 100°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (5x5)
MAX1518ETJ+T FAQ
1.How can I place an order for MAX1518ETJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1518ETJ+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 MAX1518ETJ+T reliable?
The price and inventory of MAX1518ETJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1518ETJ+T is usually 5 days.
3.What payment methods are accepted for MAX1518ETJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1518ETJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1518ETJ+T?
MAX1518ETJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1518ETJ+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 MAX1518ETJ+T?
For technical support, including MAX1518ETJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1518ETJ+T requirements.
6.How does Aetrix verify that MAX1518ETJ+T is sourced from the original manufacturer or authorized distributors?
All MAX1518ETJ+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 MAX1518ETJ+T meets industry standards.
7.What is the process for return or replacement of MAX1518ETJ+T?
All MAX1518ETJ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1518ETJ+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 MAX1518ETJ+T part is unused and in its original packaging.
Return procedure for MAX1518ETJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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