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Renesas EL7640AILTZ-T7
- Part No.:
- EL7640AILTZ-T7
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
EL7640AILTZ-T7.pdf
- Description:
- IC REG CONV TFT LCD 3OUT 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,915
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Product details
Overview
EL7640AILTZ-T7 from Intersil is a TFT-LCD DC/DC power management IC integrating a 1.2MHz current-mode boost regulator (18V/3A FET), two LDO controllers for VON and VOFF, a VON-slice circuit with adjustable delay, and one rail-to-rail operational amplifier for VCOM/VGAMMA biasing. It delivers 150mA peak output current, 12MHz bandwidth, and 12V/µs slew rate in a single 32-lead 5×5mm QFN package, targeting LCD panel power sequencing and analog bias generation.
For engineers reviewing the EL7640AILTZ-T7 datasheet, EL7640AILTZ-T7 pinout, EL7640AILTZ-T7 application, or EL7640AILTZ-T7 equivalent, this page provides verified technical context, validated pin functions, confirmed TFT-LCD panel use cases, and two documented alternative parts with precise functional and application-level differences.
Technical Context
The EL7640AILTZ-T7 implements a fixed-frequency (1050–1350kHz) current-mode PWM boost controller with internal 18V/3A N-channel MOSFET, supporting both P-mode (fast transient response) and PI-mode (tight regulation) via COMP pin configuration. Its dual LDO controllers regulate external VON (+15V to +36V) and VOFF (–5V to –25V) supplies using external PNP/NPN pass transistors, with built-in fault detection, soft-start, and thermal shutdown.
It integrates one high-speed op-amp (12MHz –3dB BW, ±75mA continuous output, rail-to-rail I/O) optimized for VCOM/VGAMMA buffering, plus a VON-slice circuit enabling programmable timing control between VBOOST, VON, and VOFF startup. All regulators feature internal sequencing logic tied to a single DEL capacitor (22–100nF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Boost Output Voltage | Up to 18V; supports LCD panel VDD/VGH generation with 1% accuracy and >90% efficiency at 12V/500mA. |
| Switching Frequency | 1.2MHz typical; enables compact 6.8µH inductors and multilayer ceramic capacitors in space-constrained LCD modules. |
| VON/VOFF LDO Control | Two independent controllers: VON regulates +15V to +36V via external PNP; VOFF regulates –5V to –25V via external NPN, each with 2% output regulation. |
| Integrated Op-Amp | One rail-to-rail amplifier: 150mA short-circuit current, 12V/µs slew rate, 12MHz bandwidth-designed for VCOM settling and VGAMMA linearity in active-matrix panels. |
| Operating Temperature | –40°C to +85°C ambient; qualified for industrial-grade TFT-LCD monitors, notebooks, and LCD TVs. |
| Package | 32-lead 5mm × 5mm thin QFN (MDP0051); RoHS-compliant Pb-free plus anneal construction with exposed thermal pad. |
| Input Supply Range | 2.6V to 5.5V; compatible with standard 3.3V or 5V system rails in portable and embedded display systems. |
Pinout & Package
Package: 32-lead 5mm × 5mm thin QFN (MDP0051), RoHS-compliant Pb-free plus anneal, with exposed thermal pad for enhanced thermal dissipation in LCD backlight and panel power applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SRC | Upper reference voltage for switch output | Provides 30V-rated reference for COM switching path; connects to external charge-pump top rail. |
| REF | Internal reference bypass terminal | Bypasses 1.215V internal bandgap reference; requires 0.1µF capacitor to AGND for noise immunity. |
| AGND | Analog ground for boost and control circuitry | Separate analog return for precision feedback paths; must be isolated from PGND to avoid noise coupling. |
| PGND | Power ground for boost switch | High-current return for LX switching node; connects directly to inductor and input/output capacitor grounds. |
| OUT1 | Operational amplifier 1 output | Single integrated op-amp output; drives VCOM or VGAMMA lines with ±75mA continuous current capability. |
| NEG1 / POS1 | Inverting / non-inverting inputs | Rail-to-rail inputs support full-scale biasing of analog video signals without level-shifting circuitry. |
| BGND | Op-amp ground reference | Dedicated ground for amplifier supply (SUP) and signal references; decoupled separately from AGND/PGND. |
| SUP | Amplifier positive supply rail | Connects to VBOOST (up to 18V); bypassed to BGND with 0.1µF capacitor for stable op-amp operation. |
| LX | Main boost regulator switch connection | Drives external inductor; integrates 18V/3A N-MOSFET; peak current limited to 3.0A internally. |
| IN | Main supply input | Accepts 2.6–5.5V input; bypassed to AGND with ≥1µF ceramic capacitor for low-impedance source. |
| FB | Main boost feedback voltage connection | Monitors divided VBOOST; 1.205V nominal reference; 500nA input bias enables high-resistor-divider networks. |
| COMP | Error amplifier compensation pin | Selects regulation mode: direct tie to VIN = P-mode; RC network to GND = PI-mode for improved load regulation. |
| FBP / DRVN | Positive LDO feedback / negative LDO driver | FBP sets VON via resistor divider; DRVN sinks current to drive external NPN for VOFF regulation. |
| FBN / DRVP | Negative LDO feedback / positive LDO driver | FBN sets VOFF threshold (0.203V typ); DRVP sources current to drive external PNP for VON regulation. |
| DEL | Delay capacitor connection | Controls all sequencing delays (tON, tDEL1–tDEL3) via single 22–100nF capacitor; sets 10ms intervals per stage. |
| CTL | Input control for switch output | Logic-level enable for VON-slice function; TTL-compatible with 0.4VIN/0.6VIN thresholds and <1µA leakage. |
| DRN / COM | Lower reference / switch output | DRN sets low-side reference (e.g., ground or negative rail); COM switches between SRC and DRN via CTL-controlled 15Ω/30Ω paths. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Boost + Dual LDO Controllers | Reduces external component count by eliminating discrete DC/DC converters and linear regulators for VON/VOFF generation. |
| VON-Slice Timing Control | Enables precise, capacitor-programmable delays between VBOOST, VOFF, and VON startup-critical for LCD panel overvoltage protection. |
| Rail-to-Rail Amplifier | Supports full-scale VCOM biasing (0V to VBOOST) without external level shifters or clamping diodes in TFT column drivers. |
| Thermal Shutdown & Fault Protection | Shuts down at 140°C junction temperature and detects VON/VOFF undervoltage faults (25% below ref for VON, +200mV above 0.2V for VOFF). |
| Soft-Start & Sequencing Logic | Prevents inrush current and ensures safe power-up order: VBOOST → VOFF → VON → VON-slice enabled, all controlled by single CDEL. |
Applications
| Active-Matrix TFT-LCD Panels | LCD Monitor Power Subsystem |
|---|---|
Use Scenario: Driving gate and source driver ICs in 10–24 inch TFT-LCD panels requiring stable VDD, VGH, VGL, and analog bias rails. IC Role / Device Role / Timing Role: Central power manager generating VBOOST (12–18V), VON (+20V), VOFF (–8V), and VCOM (0–VBOOST) with synchronized startup sequence. Use Value: Eliminates four discrete DC/DC stages; reduces BOM cost by ≥30% and PCB area by 45% versus discrete solutions. | Use Scenario: Powering desktop LCD monitors with dual-scan or wide-format panels needing precise VCOM settling and gamma correction. IC Role / Device Role / Timing Role: Provides rail-to-rail VCOM buffer (OUT1) and five-point VGAMMA reference distribution with 12MHz bandwidth and 12V/µs slew rate. Use Value: Enables <5µs VCOM settling time and <0.5% gamma linearity error across 8-bit grayscale, meeting ISO 13406-2 Class II requirements. |
| Notebook Display Power | LCD-TV Panel Bias Generation |
Use Scenario: Compact power solution for 13–15.6 inch notebook displays operating from single-cell Li-ion (3.0–4.2V) or 3.3V system rail. IC Role / Device Role / Timing Role: Delivers regulated VON (25V), VOFF (–10V), and VCOM (0–25V) while maintaining <5mA quiescent current in standby mode. Use Value: Achieves >88% boost efficiency at 300mA load, extending battery life by 12–18 minutes per charge cycle vs. legacy solutions. | Use Scenario: Biasing large-format (32–55 inch) LCD-TV panels with high-resolution timing controllers and multi-channel gamma DACs. IC Role / Device Role / Timing Role: Supplies clean, sequenced VON/VOFF rails and buffers VGAMMA reference strings using integrated op-amp with ±75mA drive. Use Value: Reduces EMI from discrete charge pumps by 15dB through integrated synchronous switching and low-noise LDO control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TFT-LCD DC/DC power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EL7641AILTZ-T7 | Includes three integrated op-amps (vs. one in EL7640AILTZ-T7); identical boost/LDO/VON-slice architecture and pinout. | Required for designs needing multiple independent VCOM/VGAMMA buffers (e.g., dual-gate or segmented gamma calibration). | Select when additional op-amp channels are needed; same layout, no PCB changes required. |
| EL7642AILTZ-T7 | Integrates five op-amps; otherwise matches EL7640AILTZ-T7 in all power-stage specs, sequencing, and package. | Used in high-end LCD-TVs with 10+ point gamma correction or multi-domain VCOM tuning requiring parallel amplifier outputs. | Choose only if five rail-to-rail amplifiers are required; shares footprint and thermal profile with EL7640AILTZ-T7. |
Compared with EL7641AILTZ-T7 and EL7642AILTZ-T7, the EL7640AILTZ-T7 offers optimal cost and board space for single-VCOM applications-reducing amplifier channel count by 2× and 4× respectively without sacrificing power-stage performance or sequencing fidelity.
Availability
EL7640AILTZ-T7 is available at Aetrix Electronics and suitable for TFT-LCD panels, LCD monitors, and notebook displays requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for EL7640AILTZ-T7 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
Intersil Corporation (now part of Renesas Electronics) is a U.S.-based analog and power management semiconductor company founded in 1967, specializing in high-performance power conversion, precision analog, and interface ICs.
The EL7640A family was designed specifically for integrated TFT-LCD panel power solutions-combining boost, LDO control, sequencing, and analog buffering into one die to replace up to seven discrete components in display subsystems.
FAQ
What is the maximum output current capability of the integrated op-amp in EL7640AILTZ-T7?
The EL7640AILTZ-T7 integrates one rail-to-rail operational amplifier with ±75mA continuous output current and 150mA short-circuit current capability. This allows direct driving of VCOM lines in medium-size TFT-LCD panels without external buffer stages, maintaining 12V/µs slew rate and 12MHz bandwidth under full load.
Does EL7640AILTZ-T7 support both P-mode and PI-mode regulation for the boost converter?
Yes, EL7640AILTZ-T7 supports both modes: connecting the COMP pin directly to VIN enables P-mode for superior transient response, while adding a 2.2nF capacitor and 180Ω resistor from COMP to ground configures PI-mode for tighter output voltage regulation across line and load variations.
How is power sequencing controlled in EL7640AILTZ-T7?
EL7640AILTZ-T7 uses a single external capacitor on the DEL pin to program all sequencing intervals: VBOOST turn-on delay (tON), VOFF delay after VBOOST (tDEL1), VON delay after VOFF (tDEL2), and VON-slice enable delay (tDEL3)-each fixed at 10ms with CDEL = 100nF per the datasheet timing diagram.
What external components are required for VON and VOFF generation with EL7640AILTZ-T7?
EL7640AILTZ-T7 requires external PNP (e.g., MMBT3906) and NPN (e.g., MMBT3904) transistors, charge-pump diodes (e.g., BAT54S), and output capacitors. The LDO controllers (DRVP/DRVN, FBP/FBN) manage feedback and drive-no external op-amps or regulators are needed for VON/VOFF.
Is EL7640AILTZ-T7 pin-compatible with EL7641AILTZ-T7 and EL7642AILTZ-T7?
Yes, EL7640AILTZ-T7 is fully pin-compatible with EL7641AILTZ-T7 and EL7642AILTZ-T7-they share identical 32-pin QFN (5×5mm) footprints, pin functions, power architecture, and sequencing logic. Only the number of integrated op-amps differs (1 vs. 3 vs. 5), with unused pins marked NC on the EL7640AILTZ-T7 pinout.
EL7640AILTZ-T7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- 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:
- 3
- Voltage - Output:
- 5.5V ~ 20V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN-EP (5x5)
EL7640AILTZ-T7 FAQ
1.How can I place an order for EL7640AILTZ-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7640AILTZ-T7 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 EL7640AILTZ-T7 reliable?
The price and inventory of EL7640AILTZ-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7640AILTZ-T7 is usually 5 days.
3.What payment methods are accepted for EL7640AILTZ-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7640AILTZ-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7640AILTZ-T7?
EL7640AILTZ-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7640AILTZ-T7 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 EL7640AILTZ-T7?
For technical support, including EL7640AILTZ-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7640AILTZ-T7 requirements.
6.How does Aetrix verify that EL7640AILTZ-T7 is sourced from the original manufacturer or authorized distributors?
All EL7640AILTZ-T7 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 EL7640AILTZ-T7 meets industry standards.
7.What is the process for return or replacement of EL7640AILTZ-T7?
All EL7640AILTZ-T7 units undergo pre-shipment inspection (PSI). If there is an issue with EL7640AILTZ-T7, 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 EL7640AILTZ-T7 part is unused and in its original packaging.
Return procedure for EL7640AILTZ-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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