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Renesas EL7583IREZ-T7
- Part No.:
- EL7583IREZ-T7
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
EL7583IREZ-T7.pdf
- Description:
- IC REG CONV LCD 2OUT 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,356
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Product details
Overview
EL7583IREZ-T7 from Intersil is a 3-channel DC/DC converter IC designed for TFT-LCD panel power management, integrating a PWM boost regulator (5V–17V output, up to 470mA at 12V), a positive charge pump (VON: +8V to +40V, 60mA), and a negative charge pump (VOFF: −5V to −40V, 60mA). It operates from 2.7V–14V input, features adjustable switching frequency (200–1000 kHz), soft-start control, and over-temperature protection (130°C trip). It powers column drivers and gate bias supplies in portable LCD displays.
For engineers reviewing the EL7583IREZ-T7 datasheet, EL7583IREZ-T7 pinout, EL7583IREZ-T7 application, or EL7583IREZ-T7 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives, and supply-chain support details specific to the Pb-free HTSSOP-20 package variant.
Technical Context
The EL7583IREZ-T7 implements a constant-frequency PWM boost controller with integrated 1.75A peak-current N-channel MOSFET, supporting continuous/discontinuous conduction modes. Its dual regulated charge pumps operate at half the boost switching frequency and use independent feedback loops (FBN, FBP) referenced to internal 1.31V references.
Start-up sequencing is controlled via separate ENBN (enables boost + VOFF) and ENP (enables VON) inputs, while SS pin governs current-limited soft-start via external capacitor. Over-temperature protection uses a die-integrated sensor with 130°C trip and 40°C hysteresis, forcing full shutdown without latch-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBOOST Output Range | 5V to 17V - sets column driver supply voltage; adjustable via FBB resistor divider |
| VON Output Range | +8V to +40V - powers TFT gate-on voltage; externally configured doubler/tripler topology |
| VOFF Output Range | −5V to −40V - powers TFT gate-off voltage; independently regulated negative rail |
| Switching Frequency | 200 kHz to 1000 kHz - set by ROSC resistor; enables optimization of inductor size vs. EMI |
| Max Output Current | 470mA @ 12V (boost), 60mA each (VON/VOFF) - defines maximum column/gate driver load capability |
| Operating Temp | −40°C to +85°C - supports industrial-grade TFT-LCD operation in extended environments |
| Over-temp Threshold | 130°C - triggers automatic shutdown to prevent thermal runaway during sustained overload |
Pinout & Package
EL7583IREZ-T7 is housed in a 20-lead Pb-free HTSSOP package (MDP0048) with exposed thermal pad, rated for −40°C to +85°C ambient operation and compatible with SnPb and Pb-free reflow profiles per IPC/JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSSB | Ground reference for boost & reference circuits | Substrate connection; must tie to single-point analog ground near VREF/SS |
| SS | Soft-start timing input | External capacitor sets current-limited ramp rate for controlled VBOOST rise time |
| FBB | Boost output voltage feedback | Divides VBOOST to match 1.300V internal reference; determines final regulated output |
| VDDB | Boost circuit supply input | Accepts 2.7V–17V; typically connected to system VIN or intermediate rail |
| LX (pins 5–7) | Internal N-FET drain node | Drives external boost inductor; three parallel pins reduce trace inductance and thermal resistance |
| DRVN | Negative charge pump driver output | Switches external diode/capacitor network to generate regulated VOFF |
| VDDN | VOFF charge pump supply input | Typically tied to VBOOST; sets available headroom for negative rail generation |
| FBN | VOFF feedback input | Senses divided VOFF; compares to internal ±80mV reference for regulation |
| VSSP | Charge pump common ground | Reference for both VON and VOFF feedback networks; isolated from VSSB in layout |
| FBP | VON feedback input | Senses divided VON; compares to 1.310V internal reference for positive rail regulation |
| VDDP | VON charge pump supply input | Typically tied to VBOOST; determines max achievable VON with external components |
| DRVP | Positive charge pump driver output | Switches external diode/capacitor network to generate regulated VON |
| PGND (pins 15–16) | Power ground return | Source connection of internal N-FET; requires low-inductance path to input/output capacitors |
| VREF | Internal reference voltage source | 1.26–1.36V output; decoupled with 0.1µF ceramic cap directly at pin |
| ENBN | Enable for boost + VOFF | Active-high logic input; controls start-up sequence of primary boost and negative rail |
| ENP | Enable for VON | Independent active-high enable; allows staggered power-up of positive gate bias rail |
| ROSC | Oscillator frequency set | Resistor-to-ground sets switching frequency; 60kΩ–240kΩ yields 200–1000 kHz |
Key Features
| Feature | Design Value |
|---|---|
| Triple-output architecture | Single-chip solution replaces three discrete regulators, reducing BOM count and PCB area in TFT-LCD designs |
| Adjustable soft-start | Capacitor-controlled ramp prevents inrush current into large column driver capacitance during power-up |
| Independent VON/VOFF enables | ENP and ENBN allow precise sequencing-e.g., VON before VOFF-to avoid gate oxide stress in TFT arrays |
| High-efficiency boost stage | 90%+ efficiency at 12V/470mA enables thermally constrained portable display applications |
| Pb-free HTSSOP package | RoHS-compliant 20-lead HTSSOP with exposed thermal pad improves thermal performance over TSSOP |
Applications
| TFT-LCD Column Driver Supply | TFT-LCD Gate-On Voltage (VON) |
|---|---|
Use Scenario: Powers high-current column driver ICs in 7–10 inch LCD panels used in industrial HMIs and medical displays. IC Role / Device Role / Timing Role: EL7583IREZ-T7 provides regulated 12V at up to 470mA as the main column driver supply rail. Use Value: Integrated boost converter eliminates need for external MOSFET and reduces component count versus discrete solutions. | Use Scenario: Generates stable +18V gate-on voltage for amorphous silicon TFT backplanes in handheld PDAs. IC Role / Device Role / Timing Role: EL7583IREZ-T7's positive charge pump delivers regulated +18V at 18mA using external diodes and capacitors. Use Value: Independent FBP feedback and ENP control enable precise VON regulation and sequencing relative to VOFF. |
| TFT-LCD Gate-Off Voltage (VOFF) | Portable Display Bias Sequencing |
Use Scenario: Supplies −6V gate-off voltage for active-matrix LCDs in ruggedized tablets operating across −30°C to +70°C. IC Role / Device Role / Timing Role: EL7583IREZ-T7's negative charge pump generates −6V at 15mA with load regulation better than ±0.5%/mA. Use Value: FBN feedback with ±80mV reference ensures tight VOFF accuracy despite temperature drift and load variation. | Use Scenario: Manages power-up order of VON, VBOOST, and VOFF rails in automotive infotainment displays to prevent latch-up. IC Role / Device Role / Timing Role: EL7583IREZ-T7 uses ENBN and ENP pins to implement programmable start-up delay between VON and VOFF rails. Use Value: Eliminates need for external sequencer IC or RC timing networks, simplifying layout and improving reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail LCD bias supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65105RGER | Single 20-pin QFN; integrates boost + dual charge pumps but lacks independent VON/VOFF enables and soft-start adjustability | Fixed internal sequencing; less flexible for custom bias timing in high-reliability displays | Choose when board space is critical and sequencing requirements are standard |
| MAX1674AEUB+ | Boost-only IC (no integrated charge pumps); requires external VON/VOFF circuitry and additional controllers | Higher BOM count and layout complexity; suitable only when full design flexibility is required | Choose only if existing designs already use MAX1674 and require incremental upgrade |
Compared with TPS65105RGER and MAX1674AEUB+, EL7583IREZ-T7 uniquely combines independent enable control, adjustable soft-start, and Pb-free HTSSOP packaging-making it optimal for new TFT-LCD designs requiring robust bias rail sequencing and thermal performance.
Availability
EL7583IREZ-T7 is available at Aetrix Electronics and suitable for TFT-LCD panel manufacturing, industrial HMI development, and portable medical display systems requiring stable component supply across long production lifecycles.
Supply support for EL7583IREZ-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 IC designer known for high-performance display, interface, and precision analog products.
The EL7583 product line was engineered specifically for TFT-LCD bias supply integration-delivering compact, efficient, and sequenced multi-rail power in a single package for portable and industrial displays.
FAQ
What is the maximum output current capability of the EL7583IREZ-T7 boost converter?
The EL7583IREZ-T7 boost converter delivers up to 470mA at 12V output and 370mA at 15V output when supplied from a 5V input. This rating assumes proper thermal management using the HTSSOP package's exposed pad and operation within the −40°C to +85°C ambient range. Peak internal FET current is limited to 1.75A to protect against overload.
How does the EL7583IREZ-T7 regulate its VON and VOFF outputs independently?
The EL7583IREZ-T7 regulates VON and VOFF through separate feedback paths: FBP senses the positive rail and compares it to a 1.310V internal reference, while FBN senses the negative rail and compares it to a ±80mV reference. Each uses dedicated driver outputs (DRVP/DRVN) and supply inputs (VDDP/VDDN), enabling independent voltage setting and sequencing via ENP and ENBN pins.
Can the EL7583IREZ-T7 be used with input voltages below 3.3V?
Yes-the EL7583IREZ-T7 supports input voltages from 2.7V to 14V. Operation at 2.7V is validated in the datasheet, though output current capability decreases at lower VIN due to reduced duty-cycle headroom and higher switch conduction losses. Efficiency remains above 80% at 2.7V input under typical loads.
What is the purpose of the SS pin on the EL7583IREZ-T7?
The SS (soft-start) pin on the EL7583IREZ-T7 controls the initial current limit during power-up by accepting an external capacitor. As the 12µA internal current source charges this capacitor, it linearly increases the MOSFET peak-current limit, thereby controlling the slew rate of VBOOST and preventing inrush into large column driver capacitances.
Does the EL7583IREZ-T7 include thermal protection, and how does it behave?
Yes-the EL7583IREZ-T7 includes over-temperature protection with a 130°C trip threshold and 40°C hysteresis. When junction temperature exceeds 130°C, the device shuts down all channels (boost, VON, VOFF) and holds in reset until temperature falls below 90°C, then resumes normal operation without requiring external reset.
EL7583IREZ-T7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Converter, TFT LCD
- Voltage - Input:
- 2.7V ~ 14V
- Number of Outputs:
- 2
- Voltage - Output:
- 5V ~ 17V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
EL7583IREZ-T7 FAQ
1.How can I place an order for EL7583IREZ-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7583IREZ-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 EL7583IREZ-T7 reliable?
The price and inventory of EL7583IREZ-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7583IREZ-T7 is usually 5 days.
3.What payment methods are accepted for EL7583IREZ-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7583IREZ-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7583IREZ-T7?
EL7583IREZ-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7583IREZ-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 EL7583IREZ-T7?
For technical support, including EL7583IREZ-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7583IREZ-T7 requirements.
6.How does Aetrix verify that EL7583IREZ-T7 is sourced from the original manufacturer or authorized distributors?
All EL7583IREZ-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 EL7583IREZ-T7 meets industry standards.
7.What is the process for return or replacement of EL7583IREZ-T7?
All EL7583IREZ-T7 units undergo pre-shipment inspection (PSI). If there is an issue with EL7583IREZ-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 EL7583IREZ-T7 part is unused and in its original packaging.
Return procedure for EL7583IREZ-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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