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Renesas EL7640ILTZ
- Part No.:
- EL7640ILTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
EL7640ILTZ.pdf
- Description:
- IC REG CONV TFT LCD 1OUT 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,533
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Product details
Overview
EL7640ILTZ 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/VOFF sequencing, a VON-slice circuit with adjustable delay, and one rail-to-rail operational amplifier for VCOM/VGAMMA biasing. It delivers 150mA peak output drive, 12MHz bandwidth, and 12V/µs slew rate in a single 32-pin QFN package, targeting LCD panel power rails.
For engineers reviewing the EL7640ILTZ datasheet, EL7640ILTZ pinout, EL7640ILTZ application, or EL7640ILTZ equivalent, this page provides verified technical context, validated pin functions, confirmed TFT-LCD panel use cases, and real-world alternative part comparisons - all grounded in FN7415 Rev 2.00 specifications and absolute maximum ratings.
Technical Context
The EL7640ILTZ implements a fixed-frequency (1050–1350 kHz) current-mode PWM boost controller with internal 18V N-channel MOSFET, supporting P-mode for fast transient response or PI-mode for tight regulation. Its dual LDO controllers regulate external VON (positive) and VOFF (negative) supplies using external transistors, with built-in fault protection, soft-start, and thermal shutdown.
It integrates one high-speed op-amp (OUT1/POS1/NEG1) with rail-to-rail I/O, 12V/µs slew rate, and ±75mA continuous output current, plus a dedicated VON-slice circuit (CTL/COM/DRN/SRC) enabling programmable timing control between VBOOST, VON, and VOFF during power-up sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Boost Output Voltage | Up to 18V; supports VON generation via external charge pump stages. |
| Oscillator Frequency | 1.2 MHz typical; enables compact 6.8µH inductor and ceramic capacitor selection. |
| Op-Amp Slew Rate | 12 V/µs; ensures stable VCOM settling in high-resolution TFT-LCD column drivers. |
| VON/VOFF Regulation | ±2% accuracy; achieved via external resistor feedback on FBP/FBN pins. |
| Operating Temperature | -40°C to +85°C ambient; qualified for industrial-grade LCD monitor and notebook applications. |
| Package | 32-lead 5mm × 5mm thin QFN (MDP0051); exposes thermal pad for enhanced power dissipation. |
| Input Supply Range | 2.6V to 5.5V; compatible with single-cell Li-ion or 3.3V/5V system rails. |
Pinout & Package
EL7640ILTZ is housed in a 32-lead Pb-free thin QFN (5mm × 5mm, MDP0051), with exposed thermal pad soldered to PCB ground for thermal management. Pin numbering follows top-view orientation per FN7415 Rev 2.00.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SRC | Upper reference voltage source | Provides 20V reference for COM switching; connects to positive charge-pump stage. |
| REF | Internal reference bypass | Requires 0.1µF capacitor to AGND for stable 1.215V reference generation. |
| AGND | Analog ground | Reference for boost control loop, FB, COMP, and REF; must be separated from PGND. |
| PGND | Power ground | Return path for LX switch current; low-inductance connection critical for EMI control. |
| OUT1 | Amplifier output | Rail-to-rail output driving VCOM or VGAMMA; rated for ±75mA continuous load. |
| POS1 / NEG1 | Non-inverting / inverting input | Full rail-to-rail common-mode range (0V to VSUP); supports DC-bias and AC-coupled signals. |
| BGND | Op-amp ground | Separate analog ground for amplifier section; decoupled via 0.1µF to SUP. |
| SUP | Amplifier positive supply | Connected to VBOOST (up to 18V); bypassed to BGND with 0.1µF ceramic capacitor. |
| LX | Boost switch node | Drives external inductor; 18V/3A integrated FET; requires low-ESR ceramic output cap. |
| IN | Main input supply | 2.6–5.5V input; bypassed to AGND with ≥1µF ceramic capacitor. |
| FB | Boost feedback | Monitors VBOOST via resistor divider; 1.205V typical threshold; 500nA bias current. |
| COMP | Error amplifier compensation | Configures P-mode (direct to VIN) or PI-mode (RC network to GND) for loop stability. |
| FBP | Positive LDO feedback | Sets VON via external resistor divider; 1.2V reference; 0.5% load regulation. |
| DRVP | Positive LDO driver | Sinks up to 4mA to drive external PNP pass transistor base (e.g., MMBT3906). |
| FBN | Negative LDO feedback | Sets VOFF via resistor divider; 0.203V nominal reference; 0.5% load regulation. |
| DRVN | Negative LDO driver | Sources up to 4mA to drive external NPN pass transistor base (e.g., MMBT3904). |
| DEL | Delay capacitor connection | Connects 50–220nF capacitor to set VON/VOFF sequencing delays (e.g., 10–30ms). |
| CTL | VON-slice control input | TTL-compatible logic input (0.4VIN/0.6VIN thresholds); enables COM switching path. |
| DRN | Lower reference voltage | Provides reference for negative charge-pump stage; connected to COM when CTL = 0. |
| COM | Switch output | When CTL = 1: connects SRC through 15Ω; when CTL = 0: connects DRN through 30Ω. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 18V/3A boost FET | Reduces external component count by eliminating discrete high-voltage switch. |
| Rail-to-rail op-amp I/O | Enables direct interface with full-scale VCOM bias without level-shifting circuitry. |
| VON-slice timing control | Allows precise sequencing of VON relative to VBOOST and VOFF using single DEL capacitor. |
| Dual independent LDO controllers | Supports asymmetric VON (+15–36V) and VOFF (–5––25V) generation with external transistors. |
| Thermal shutdown & overload protection | Shuts down at 140°C junction temperature; includes FB fault trip, current limit, and soft-start. |
Applications
| LCD Monitor Power Management | Notebook Display Subsystem |
|---|---|
Use Scenario: Powering 15–24-inch TFT-LCD panels requiring regulated VON, VOFF, and VCOM rails. IC Role / Device Role / Timing Role: Central power hub generating VBOOST (12V), regulating VON (+20V) and VOFF (–8V), and buffering VCOM with rail-to-rail op-amp. Use Value: Single-chip integration eliminates 3–5 discrete regulators and op-amps, reducing BOM cost and PCB area by >40%. | Use Scenario: Supporting slim-profile notebook displays with strict thermal and layout constraints. IC Role / Device Role / Timing Role: Delivers sequenced startup (VBOOST → VOFF → VON → VON-slice enable) to prevent panel latch-up during cold boot. Use Value: Programmable DEL capacitor sets tDEL1/tDEL2/tDEL3 delays (10–30ms), ensuring safe power-up across varying panel capacitances. |
| TFT-LCD Panel Reference Design | Industrial HMI Display Module |
Use Scenario: Serving as core power IC in Intersil's recommended LCD reference designs (e.g., FN7415 Figure 22). IC Role / Device Role / Timing Role: Controls one-stage charge pump for VON, drives external PNP/NPN transistors, and buffers gamma correction voltage. Use Value: 12MHz op-amp bandwidth and 12V/µs slew rate maintain gamma linearity across 1920×1080 RGB pixel updates. | Use Scenario: Enabling ruggedized human-machine interface displays operating in –40°C to +85°C environments. IC Role / Device Role / Timing Role: Provides robust VON/VOFF regulation under wide-input (2.6–5.5V) and high-temp conditions with thermal shutdown. Use Value: ±2% LDO regulation and 1% boost accuracy ensure consistent contrast ratio and grayscale fidelity over temperature. |
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 |
|---|---|---|---|
| ISL97645A | Higher integration: 3-channel gamma buffer + VCOM + VON/VOFF regulators; 2.5MHz boost; RoHS-compliant. | Replaces EL7640ILTZ in new designs; supports higher-resolution panels (QHD+) and faster gamma update rates. | Select ISL97645A for new designs requiring extended feature set and active lifecycle support. |
| EL7641ILTZ | Same package and pinout; adds two additional op-amps (OUT2/OUT3) for multi-gamma channel support. | Used where three independent VCOM/VGAMMA buffers are required; no change to VON/VOFF or boost functionality. | Choose EL7641ILTZ only if additional op-amp channels are needed; otherwise EL7640ILTZ remains optimal for single-VCOM systems. |
Compared with EL7640ILTZ, ISL97645A offers higher switching frequency and integrated gamma buffers for next-gen panels, while EL7641ILTZ extends analog channel count without altering core power architecture - both require board-level validation but share identical sequencing and thermal behavior.
Availability
EL7640ILTZ is available at Aetrix Electronics and suitable for TFT-LCD monitors, notebook displays, and industrial HMI panels requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for EL7640ILTZ 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 semiconductor company specializing in precision analog and power management ICs for display, industrial, and communications markets.
The EL7640 family was designed specifically for TFT-LCD panel power subsystems, integrating boost conversion, dual LDO control, and VCOM/VGAMMA amplification into a single QFN package to reduce solution size and design complexity.
FAQ
What is the maximum continuous output current of the EL7640ILTZ op-amp?
The EL7640ILTZ op-amp (OUT1) supports ±75mA continuous output current per the Absolute Maximum Ratings table on page 3 of FN7415 Rev 2.00. This rating applies across the full –40°C to +85°C operating temperature range and enables direct driving of VCOM loads in mid-size LCD panels without external buffering.
Does the EL7640ILTZ support both P-mode and PI-mode for the boost regulator?
Yes, the EL7640ILTZ supports both modes: P-mode is enabled by connecting the COMP pin directly to VIN for superior transient response, while PI-mode uses a 2.2nF capacitor and 180Ω resistor to ground for tighter output regulation. Mode selection is hardware-configurable and documented in the Applications Information section (page 12).
What is the function of the DEL pin on the EL7640ILTZ?
The DEL pin on the EL7640ILTZ connects to an external capacitor (50–220nF) that sets timing delays for the internal power sequencing block - including tDEL1 (VBOOST to VOFF), tDEL2 (VON to VOFF), and tDEL3 (VON to VON-slice enable). Typical values yield 10–30ms delays, ensuring safe ramp-up of LCD panel bias rails.
Can the EL7640ILTZ generate VON voltages above +36V?
No - the EL7640ILTZ's DRVP pin is rated for up to +36V (per Absolute Maximum Ratings), and its internal protection clamps SRC/COM outputs at 36V. For VON > +36V, FN7415 Rev 2.00 recommends adding an external cascode NPN transistor between DRVP and the PNP pass device base, as shown in Figure 21.
Is the EL7640ILTZ pin-compatible with the EL7641ILTZ or EL7642ILTZ?
Yes - all three variants (EL7640ILTZ, EL7641ILTZ, EL7642ILTZ) share identical 32-pin QFN packaging, pinout, and core functionality (boost, LDO controllers, VON-slice). Differences lie only in op-amp count: EL7640 has one, EL7641 has three, and EL7642 has five - unused op-amp pins are NC in lower variants.
EL7640ILTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Applications:
- Converter, TFT LCD
- Voltage - Input:
- 2.6V ~ 5.5V
- Number of Outputs:
- 1
- Voltage - Output:
- 5.5V ~ 20V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN-EP (5x5)
EL7640ILTZ FAQ
1.How can I place an order for EL7640ILTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7640ILTZ 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 EL7640ILTZ reliable?
The price and inventory of EL7640ILTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7640ILTZ is usually 5 days.
3.What payment methods are accepted for EL7640ILTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7640ILTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7640ILTZ?
EL7640ILTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7640ILTZ 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 EL7640ILTZ?
For technical support, including EL7640ILTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7640ILTZ requirements.
6.How does Aetrix verify that EL7640ILTZ is sourced from the original manufacturer or authorized distributors?
All EL7640ILTZ 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 EL7640ILTZ meets industry standards.
7.What is the process for return or replacement of EL7640ILTZ?
All EL7640ILTZ units undergo pre-shipment inspection (PSI). If there is an issue with EL7640ILTZ, 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 EL7640ILTZ part is unused and in its original packaging.
Return procedure for EL7640ILTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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