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Renesas EL7642ILTZ
- Part No.:
- EL7642ILTZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
EL7642ILTZ.pdf
- Description:
- IC REG CONV TFT LCD 1OUT 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,598
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Product details
Overview
EL7642ILTZ from Intersil is a TFT-LCD DC/DC power management IC integrating a 1.2MHz current-mode boost regulator (18V/3A integrated N-MOSFET), two LDO controllers (VON and VOFF), a VON-slice circuit with adjustable delay, and five rail-to-rail operational amplifiers for VCOM/VGAMMA biasing - delivering 150mA peak output current, 12MHz bandwidth, and 12V/µs slew rate in LCD panel power systems.
For engineers reviewing the EL7642ILTZ datasheet, EL7642ILTZ pinout, EL7642ILTZ application, or EL7642ILTZ equivalent, this page provides verified technical context, exact pin functions per the 32-lead QFN package, confirmed amplifier count (5), LDO controller architecture, and real-world sequencing behavior for TFT-LCD panel design validation.
Technical Context
The EL7642ILTZ implements a fixed-frequency (1050–1350 kHz) current-mode PWM boost converter with internal 18V/3A N-channel MOSFET and selectable P-mode (fast transient response) or PI-mode (tight regulation) control. Its five op-amps feature rail-to-rail I/O, ±75mA continuous output, and are explicitly assigned to VCOM/VGAMMA generation in TFT-LCD timing chains.
Two independent LDO controllers regulate VON (positive, up to +36V) and VOFF (negative, down to –25V) using external transistors, with built-in fault protection, soft-start (2 ms), and programmable sequencing delays (tDEL1–tDEL3) controlled by CDEL = 220 nF. The VON-slice circuit enables precise gate-on timing control via CTL input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Boost Output Voltage | Up to 18V; set by external resistor divider on FB pin; supports 12V typical for LCD logic rails. |
| Switching Frequency | 1.2 MHz nominal; enables compact 6.8 µH inductors and low-profile ceramic capacitors in space-constrained panels. |
| Integrated FET Rating | 18V drain-source, 3A peak current; eliminates external high-voltage switch in boost stage. |
| Op-Amp Count & Drive | Five independent rail-to-rail amplifiers; each delivers ±75mA continuous output for VCOM/VGAMMA line driving. |
| LDO Controller Outputs | VON (positive, 15–36V) and VOFF (negative, –5 to –25V); regulated via external PNP/NPN pass transistors. |
| Operating Temperature | –40°C to +85°C ambient; qualified for industrial-grade TFT-LCD monitor and notebook display modules. |
| Package | 32-lead 5 mm × 5 mm thin QFN (MDP0051); exposed thermal pad for enhanced power dissipation (2.857W on JEDEC JESD51-7 board). |
Pinout & Package
EL7642ILTZ is housed in a 32-lead, 5 mm × 5 mm thin QFN package (MDP0051) with exposed thermal pad. Pin assignments are specific to the EL7642 variant and differ from EL7640/EL7641 due to expanded amplifier count.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1–OUT5 | Op-amp outputs | Drive VCOM and VGAMMA reference lines; rail-to-rail swing supports full-panel gamma correction. |
| POS1–POS5, NEG1–NEG5 | Op-amp inputs | Non-inverting/inverting inputs for five independent amplifiers; support precision feedback networks. |
| SUP | Amplifier positive supply | Bypassed to BGND with 0.1 µF capacitor; powers all five op-amps at VSUP (4.5–18V). |
| DRVP / DRVN | LDO transistor drivers | Drive external PNP (VON) and NPN (VOFF) pass transistors; sink/source capability supports >2 mA control current. |
| FBP / FBN | LDO feedback inputs | Monitor VON (1.2V reference) and VOFF (0.2V reference); enable tight regulation with external resistor dividers. |
| CTL / DEL / COM | VON-slice timing interface | CTL enables slice function; DEL sets delay via capacitor; COM switches between SRC/DRN references under CTL control. |
Key Features
| Feature | Design Value |
|---|---|
| Five integrated op-amps | Enables single-chip VCOM + 4-channel VGAMMA biasing without external amplifiers - reduces BOM count and layout area. |
| Programmable VON-slice delay | Adjustable timing (via CDEL) between VBOOST and VON activation ensures safe gate-on sequencing in TFT pixel charging. |
| Independent VON/VOFF LDO controllers | Supports asymmetric panel supplies: +20V VON and –8V VOFF with separate fault detection and soft-start. |
| 1.2 MHz boost switching | Permits use of small 6.8 µH inductors and multilayer ceramic capacitors - critical for ultra-thin LCD module designs. |
| Rail-to-rail op-amp I/O | Maximizes dynamic range across full supply rails (e.g., 0–12V or –5–+15V), essential for accurate gamma voltage distribution. |
Applications
| TFT-LCD Panel Power Management | VCOM & VGAMMA Bias Generation |
|---|---|
Use Scenario: Powering 10.1"–23.8" active-matrix TFT-LCD panels requiring stable VON (+20V), VOFF (–8V), and VLOGIC (12V) rails. IC Role / Device Role / Timing Role: Central power SoC managing boost conversion, dual LDO control, and five-channel analog bias generation with built-in sequencing. Use Value: Eliminates six discrete ICs (boost controller + 2 LDO drivers + 3 op-amps) - reduces PCB area by ≥40% and improves system-level EMI. | Use Scenario: Generating precise gamma-correction voltages for 8-bit or 10-bit grayscale reproduction in commercial monitors. IC Role / Device Role / Timing Role: Five rail-to-rail op-amps configured as buffered VGAMMA dividers and VCOM level shifters with matched gain/offset. Use Value: 12 MHz bandwidth and 12 V/µs slew rate ensure <1 µs settling for 1024×600 pixel updates - prevents vertical banding artifacts. |
| Notebook Display Subsystem | LCD-TV Timing Controller Interface |
Use Scenario: Integrated power solution for 15.6" notebook displays operating from 3.3V or 5V battery/supply rails. IC Role / Device Role / Timing Role: Regulates panel supplies while synchronizing VON activation with gate driver enable signals via CTL pin. Use Value: Built-in 30 ms turn-on delay (tON) and 17 ms VON–VOFF delay (tDEL2) prevent latch-up during cold start. | Use Scenario: Supporting 4K UHD LCD-TVs with fast-refresh timing controllers requiring low-noise, high-current VCOM drive. IC Role / Device Role / Timing Role: Delivers 150 mA peak current per op-amp channel to drive heavy capacitive VCOM bus (≥10 nF). Use Value: ±75 mA continuous output per amplifier sustains 60 Hz frame rates without droop - maintains contrast uniformity across full screen. |
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 |
|---|---|---|---|
| ISL97645A | Single-chip solution with integrated boost, VON/VOFF LDOs, and 4 op-amps; no VON-slice circuit; RoHS-compliant and actively recommended. | Supports up to 4-channel VGAMMA only; lacks dedicated CTL/DEL/COM timing interface for gate-on slicing. | Select ISL97645A when VON-slice functionality is not required and newer RoHS compliance is mandatory. |
| TPS65105 | TI device with boost + dual LDOs + 3 op-amps; 1.1 MHz switching; no VON-slice; different pinout and compensation scheme. | Optimized for smaller panels (<12"); lower op-amp count limits VGAMMA resolution to 6-bit equivalent. | Choose TPS65105 for cost-sensitive 7"–10" portable displays where 5-channel biasing is unnecessary. |
Compared with ISL97645A and TPS65105, EL7642ILTZ uniquely provides five op-amps plus VON-slice timing control in a single 5×5 mm QFN - making it irreplaceable for high-resolution, high-refresh-rate TFT panels requiring full gamma tuning and precise gate-on sequencing.
Availability
EL7642ILTZ is available at Aetrix Electronics and suitable for TFT-LCD panels, notebook displays, and LCD-TVs requiring stable component supply, long-term production continuity, and legacy design support.
Supply support for EL7642ILTZ 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 (now part of Renesas Electronics) is a semiconductor company specializing in high-performance analog and power management ICs for industrial, computing, and consumer electronics.
The EL764x family was designed specifically for integrated TFT-LCD panel power solutions - combining boost conversion, LDO control, and multi-channel analog biasing to replace discrete power subsystems in flat-panel displays.
FAQ
What is the maximum number of operational amplifiers integrated into EL7642ILTZ?
The EL7642ILTZ integrates exactly five operational amplifiers - OUT1–OUT5 with corresponding POS/NEG inputs - as confirmed in the FN7415 datasheet pin description table and block diagram. This distinguishes EL7642ILTZ from EL7641 (three amps) and EL7640 (one amp). All five amplifiers are rail-to-rail, support ±75 mA continuous output, and are intended for VCOM and VGAMMA bias generation in TFT-LCD panels.
Does EL7642ILTZ include built-in power sequencing for VON and VOFF rails?
Yes, EL7642ILTZ provides hardware-based power sequencing: tDEL1 = 10 ms (VBOOST to VOFF), tDEL2 = 17 ms (VON to VOFF), and tDEL3 = 10 ms (VON to VON-slice enable), all controlled by the CDEL capacitor (50–220 nF). These delays are measured from the rising edge of VBOOST and ensure safe startup in TFT-LCD panels to prevent gate driver latch-up or pixel charging faults.
What package type and thermal characteristics does EL7642ILTZ use?
EL7642ILTZ uses a 32-lead 5 mm × 5 mm thin QFN package (MDP0051) with exposed thermal pad. On a JEDEC JESD51-7 high-conductivity test board, it delivers 2.857 W power dissipation (θJA = 35°C/W); on a single-layer JEDEC board, it dissipates 758 mW (θJA = 125°C/W). The package is Pb-free plus anneal (RoHS compliant) and rated for –40°C to +85°C operation.
Can EL7642ILTZ operate in both P-mode and PI-mode for the boost regulator?
Yes, EL7642ILTZ supports both modes: P-mode (connect COMP directly to VIN) for superior transient response, and PI-mode (add 2.2 nF capacitor + 180 Ω resistor from COMP to GND) for tighter output regulation. Mode selection is confirmed in the FN7415 datasheet Section "Compensation" and affects loop stability, load step recovery, and line/load regulation performance.
Is there a recommended replacement for EL7642ILTZ given its "Not Recommended for New Designs" status?
Yes - the ISL97645A is explicitly listed in the FN7415 datasheet as the "Recommended Replacement Part" for EL7642ILTZ. While ISL97645A offers modern RoHS compliance and similar boost + dual LDO + op-amp functionality, it provides only four op-amps and omits the VON-slice circuit (CTL/DEL/COM), so direct substitution requires schematic and timing validation.
EL7642ILTZ 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)
EL7642ILTZ FAQ
1.How can I place an order for EL7642ILTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7642ILTZ 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 EL7642ILTZ reliable?
The price and inventory of EL7642ILTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7642ILTZ is usually 5 days.
3.What payment methods are accepted for EL7642ILTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7642ILTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7642ILTZ?
EL7642ILTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7642ILTZ 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 EL7642ILTZ?
For technical support, including EL7642ILTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7642ILTZ requirements.
6.How does Aetrix verify that EL7642ILTZ is sourced from the original manufacturer or authorized distributors?
All EL7642ILTZ 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 EL7642ILTZ meets industry standards.
7.What is the process for return or replacement of EL7642ILTZ?
All EL7642ILTZ units undergo pre-shipment inspection (PSI). If there is an issue with EL7642ILTZ, 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 EL7642ILTZ part is unused and in its original packaging.
Return procedure for EL7642ILTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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