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Renesas EL7640ILTZ-T7
- Part No.:
- EL7640ILTZ-T7
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
EL7640ILTZ-T7.pdf
- Description:
- IC REG CONV TFT LCD 1OUT 32TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,399
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Product details
Overview
EL7640ILTZ-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 5mm × 5mm thin QFN package, targeting LCD panel power sequencing in notebooks and monitors.
For engineers reviewing the EL7640ILTZ-T7 datasheet, EL7640ILTZ-T7 pinout, EL7640ILTZ-T7 application, or EL7640ILTZ-T7 equivalent, key selection criteria include its integrated single op-amp configuration (vs. EL7641/EL7642), 2.6–5.5V input range, -40°C to +85°C operation, and compatibility with external charge-pump-based VON/VOFF generation requiring discrete PNP/NPN pass transistors.
Technical Context
The EL7640ILTZ-T7 implements a fixed-frequency (1050–1350kHz) current-mode PWM boost controller with internal 18V N-channel MOSFET, supporting both P-mode (fast transient response) and PI-mode (tighter regulation) via COMP pin configuration. Its dual LDO controllers regulate VON (positive, up to +36V) and VOFF (negative, down to -25V) using external transistors, with built-in fault detection (VFBP trip at 0.82–0.98V, VFBN trip at 380–480mV) and programmable start-up delays (tDEL1 = 10ms, tDEL2 = 17ms).
The single integrated op-amp features rail-to-rail I/O, 12MHz -3dB bandwidth, 12V/µs slew rate, ±75mA continuous output current, and 3–12mV offset voltage - optimized for VCOM buffering in TFT-LCD timing-critical bias networks where low distortion and fast settling are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Boost Output Range | Up to 18V; supports VON generation >36V via external charge pump stages. |
| Input Voltage Range | 2.6V to 5.5V; compatible with single-cell Li-ion or 3.3V/5V system rails. |
| Op-Amp Bandwidth | 12MHz -3dB; ensures stable VCOM drive across full video frame rates without phase lag. |
| VON/VOFF Regulation | 2% accuracy; enables precise gamma correction and contrast control in LCD panels. |
| Thermal Shutdown | 140°C junction limit; protects against thermal runaway during sustained high-current VCOM drive. |
| Package | 32-lead 5mm × 5mm thin QFN (MDP0051); RoHS-compliant Pb-free plus anneal finish. |
| Operating Temp | -40°C to +85°C ambient; validated for industrial-grade notebook and monitor environments. |
Pinout & Package
EL7640ILTZ-T7 is housed in a 32-lead 5mm × 5mm thin QFN package (MDP0051) with exposed thermal pad. Pin numbering follows top-view layout per FN7415 Rev 2.00, Page 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SRC (Pin 1) | Upper reference voltage source | Provides high-side reference for COM switch; connects to external VON charge-pump capacitor node. |
| REF (Pin 2) | Internal reference bypass | Requires 0.1µF ceramic capacitor to AGND for stable 1.2V reference generation. |
| AGND (Pin 3) | Analog ground | Reference for boost control loop, FB, COMP, and REF; must be separated from PGND. |
| PGND (Pin 4) | Power ground | Return path for LX switching current; ties directly to boost inductor and output capacitor ground. |
| OUT1 (Pin 5) | Op-amp 1 output | Drives VCOM or VGAMMA line; rated for ±75mA continuous, 150mA peak output. |
| NEG1 (Pin 6) | Op-amp 1 inverting input | Accepts feedback signal for closed-loop VCOM bias control; rail-to-rail compatible. |
| POS1 (Pin 7) | Op-amp 1 non-inverting input | Receives reference voltage or DAC output for precision VCOM level setting. |
| BGND (Pin 11) | Op-amp ground | Ground reference for all op-amp inputs/outputs; isolated from AGND/PGND for noise immunity. |
| SUP (Pin 14) | Op-amp positive supply | Connects to VSUP (4.5–18V); bypassed to BGND with 0.1µF capacitor. |
| LX (Pin 21) | Boost switch node | Drives external inductor; integrates 18V/3A N-MOSFET; requires low-ESR ceramic output cap. |
| IN (Pin 22) | Main input supply | 2.6–5.5V system rail; bypassed to AGND with ≥1µF ceramic capacitor. |
| FB (Pin 23) | Boost feedback | Monitors VBOOST via resistor divider; 1.188–1.222V threshold sets output voltage accuracy. |
| COMP (Pin 24) | Error amplifier compensation | Selects P-mode (tie to VIN) or PI-mode (RC network to GND) for transient vs. regulation trade-off. |
| FBP (Pin 25) | VON LDO feedback | Inputs divided VON voltage; 1.176–1.229V reference enables precise positive bias regulation. |
| DRVP (Pin 26) | VON LDO driver | Sinks up to 4mA to drive external PNP pass transistor base for VON generation. |
| FBN (Pin 27) | VOFF LDO feedback | Monitors negative rail; 0.171–0.235V reference enables accurate VOFF regulation. |
| DRVN (Pin 28) | VOFF LDO driver | Sources up to 4mA to drive external NPN pass transistor base for VOFF generation. |
| DEL (Pin 29) | Delay timing capacitor | Connects to CDEL (50–220nF) to set VON/VOFF sequencing delays (tDEL1–tDEL3). |
| CTL (Pin 30) | VON-slice control | Enables/disables VON-slice function; logic-high connects COM to SRC, logic-low to DRN. |
| DRN (Pin 31) | Lower reference voltage | Provides low-side reference for COM switch; used in VON-slice timing and fault detection. |
| COM (Pin 32) | Switch output | Outputs switched reference; 15Ω on to SRC (CTL=1), 30Ω on to DRN (CTL=0). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated single op-amp | Eliminates need for external VCOM buffer IC; reduces BOM count and PCB area in compact LCD designs. |
| Rail-to-rail I/O amplifiers | Enables full-scale VCOM voltage swing (e.g., 0–5V or -2V to +3V) without headroom loss or clipping. |
| Programmable VON/VOFF sequencing | Configurable delays (tDEL1–tDEL3) ensure safe power-up order: VBOOST → VOFF → VON → VON-slice enable. |
| 1.2MHz boost switching | Allows use of small-profile 6.8µH inductors and multilayer ceramic capacitors, minimizing solution size. |
| Thermal shutdown + overload protection | Prevents damage during VCOM short-circuit events or excessive VON/VOFF load currents. |
Applications
| TFT-LCD Panel Power Management | VCOM Bias Generation |
|---|---|
Use Scenario: Driving gate drivers and source drivers in active-matrix TFT-LCD panels requiring stable, sequenced high-voltage rails. IC Role / Device Role / Timing Role: Central power management IC generating VBOOST (12V), VON (+20V), VOFF (-8V), and VCOM bias via integrated op-amp. Use Value: Reduces component count by integrating boost, dual LDO controllers, and VCOM amplifier - cutting bill-of-materials cost by ~30% vs. discrete solutions. | Use Scenario: Providing precise, low-noise DC bias to the common electrode (VCOM) of LCD pixels to maintain consistent contrast and grayscale fidelity. IC Role / Device Role / Timing Role: Single rail-to-rail op-amp (OUT1/POS1/NEG1) delivering 150mA peak current with 12V/µs slew rate for fast pixel charging. Use Value: 12MHz bandwidth and ±75mA continuous output eliminate VCOM droop during high-refresh-rate video playback (e.g., 120Hz panels). |
| Notebook Display Subsystem | LCD Monitor Power Sequencing |
Use Scenario: Enabling slim, thermally constrained notebook displays with tight space budgets and strict EMI limits. IC Role / Device Role / Timing Role: Compact 5×5mm QFN IC providing regulated VON/VOFF and VCOM from single 3.3V input with internal soft-start and fault protection. Use Value: Internal 1.2MHz switching and integrated FET reduce EMI filter requirements and eliminate external MOSFET layout complexity. | Use Scenario: Ensuring reliable startup of desktop LCD monitors with multi-stage charge pumps and external PNP/NPN pass transistors. IC Role / Device Role / Timing Role: Dual LDO controllers (DRVP/DRVN) with programmable delay capacitor (CDEL) enforce safe VBOOST→VOFF→VON power-up sequence. Use Value: Prevents latch-up and display artifacts by guaranteeing minimum 10ms delay between VBOOST and VOFF, and 17ms between VON and VOFF. |
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 VON/VOFF charge pumps, no external transistors required; higher integration but no integrated op-amp. | Eliminates external PNP/NPN transistors and associated base resistors; requires redesign of VCOM buffering stage. | Preferred for new designs seeking reduced external component count and simplified layout - though VCOM must be driven externally. |
| EL7641ILTZ-T7 | Same package and pinout; includes three op-amps instead of one; identical boost/LDO architecture and sequencing logic. | Supports multi-gamma channel architectures (e.g., R/G/B VCOM or segmented VGAMMA) without adding ICs. | Select when multiple independent bias voltages are needed; not drop-in due to unused pins being NC in EL7640, but footprint-compatible. |
Compared with EL7640ILTZ-T7, ISL97645A removes external transistor dependencies but adds external VCOM buffering complexity, while EL7641ILTZ-T7 retains full pin compatibility and extends analog capability - making EL7640ILTZ-T7 optimal for cost-sensitive, single-VCOM LCD modules.
Availability
EL7640ILTZ-T7 is available at Aetrix Electronics and suitable for TFT-LCD panel manufacturing, notebook display subsystems, and LCD monitor power design requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for EL7640ILTZ-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 (now part of Renesas Electronics) is a semiconductor company specializing in precision analog, power management, and interface ICs for industrial, computing, and consumer applications.
The EL7640 family belongs to Intersil's TFT-LCD power management product line, designed specifically to integrate boost conversion, programmable VON/VOFF generation, and VCOM/VGAMMA biasing into a single compact IC for space-constrained display systems.
FAQ
What is the maximum output voltage supported by the EL7640ILTZ-T7 boost regulator?
The EL7640ILTZ-T7 boost regulator supports an output voltage range up to 18V. This VBOOST output serves as the primary rail for driving external charge-pump circuits that generate higher voltages such as VON (up to +36V) and VOFF (down to -25V). The internal 18V/3A N-channel MOSFET and 1.2MHz switching frequency enable efficient, compact implementation without external high-voltage switches. EL7640ILTZ-T7 datasheet specifies VBOOST regulation accuracy of ±1% under load and line variations.
How many operational amplifiers does the EL7640ILTZ-T7 integrate?
The EL7640ILTZ-T7 integrates exactly one operational amplifier (OUT1/POS1/NEG1), distinguishing it from the EL7641 (three op-amps) and EL7642 (five op-amps) in the same family. This single rail-to-rail amplifier delivers 150mA peak output current, 12MHz bandwidth, and 12V/µs slew rate - optimized for VCOM biasing in standard TFT-LCD panels. EL7640ILTZ-T7 pinout confirms only OUT1, NEG1, and POS1 are functional; all other op-amp pins (e.g., OUT2, POS2) are marked NC.
Does the EL7640ILTZ-T7 support programmable power sequencing?
Yes, the EL7640ILTZ-T7 supports fully programmable power sequencing via the DEL pin (Pin 29), which accepts an external timing capacitor (CDEL = 50–220nF) to set precise delays: tDEL1 = 10ms (VBOOST to VOFF), tDEL2 = 17ms (VON to VOFF), and tDEL3 = 10ms (VON to VON-slice enable). This ensures safe startup order critical for preventing LCD panel damage or display artifacts. EL7640ILTZ-T7's CTL and COM pins further enable dynamic VON-slice control during operation.
What external components are required for VON and VOFF generation with the EL7640ILTZ-T7?
VON and VOFF generation with EL7640ILTZ-T7 requires external components: a charge-pump diode-capacitor network driven from the LX node, plus discrete PNP (for VON) and NPN (for VOFF) pass transistors controlled by DRVP and DRVN outputs. Base-emitter resistors (e.g., 700Ω for MMBT3906 PNP) are needed to set drive current. EL7640ILTZ-T7 does not integrate charge-pump switches or LDO pass elements - its LDO controllers provide only transconductance amplifiers and fault comparators.
Is the EL7640ILTZ-T7 pin-compatible with other members of the EL764x family?
Yes, the EL7640ILTZ-T7 shares identical 32-lead 5mm × 5mm thin QFN package (MDP0051) and pinout with EL7641ILTZ-T7 and EL7642ILTZ-T7 - all devices have matching SRC, REF, AGND, PGND, LX, IN, FB, COMP, FBP, DRVP, FBN, DRVN, DEL, CTL, DRN, and COM pin assignments. However, op-amp pins beyond OUT1/NEG1/POS1 are NC in EL7640ILTZ-T7, so board designs can reuse the same footprint across the family while selecting variant-specific functionality.
EL7640ILTZ-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:
- 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-T7 FAQ
1.How can I place an order for EL7640ILTZ-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7640ILTZ-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 EL7640ILTZ-T7 reliable?
The price and inventory of EL7640ILTZ-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7640ILTZ-T7 is usually 5 days.
3.What payment methods are accepted for EL7640ILTZ-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7640ILTZ-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7640ILTZ-T7?
EL7640ILTZ-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7640ILTZ-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 EL7640ILTZ-T7?
For technical support, including EL7640ILTZ-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7640ILTZ-T7 requirements.
6.How does Aetrix verify that EL7640ILTZ-T7 is sourced from the original manufacturer or authorized distributors?
All EL7640ILTZ-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 EL7640ILTZ-T7 meets industry standards.
7.What is the process for return or replacement of EL7640ILTZ-T7?
All EL7640ILTZ-T7 units undergo pre-shipment inspection (PSI). If there is an issue with EL7640ILTZ-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 EL7640ILTZ-T7 part is unused and in its original packaging.
Return procedure for EL7640ILTZ-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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