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Renesas EL7583IR-T7
- Part No.:
- EL7583IR-T7
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
EL7583IR-T7.pdf
- Description:
- IC REG CONV TFT LCD 2OUT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,985
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Product details
Overview
EL7583IR-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–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 shutdown at 130°C.
For engineers reviewing the EL7583IR-T7 datasheet, EL7583IR-T7 pinout, EL7583IR-T7 application, or EL7583IR-T7 equivalent, this page delivers verified specifications, validated pin functions, confirmed TFT-LCD supply use cases, and two rigorously cross-checked alternative parts with documented technical and application differences.
Technical Context
The EL7583IR-T7 implements a constant-frequency PWM boost converter with integrated N-channel MOSFET (RDS(on) = 0.22 Ω), supporting 200–1000 kHz switching via ROSC resistor. Its dual regulated charge pumps operate at half the boost frequency and use independent feedback loops (FBN, FBP) with ±80 mV and 1.245–1.375 V reference tolerances respectively.
Start-up sequencing is controlled by separate ENBN (enables boost + VOFF) and ENP (enables VON) logic inputs with 1.6 V high-threshold and 0.8 V low-threshold, while SS pin governs current-limited ramp via external capacitor. Over-temperature protection triggers at 130°C with 40°C hysteresis, disabling all channels until die cools to 90°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 14V - supports single-cell Li-ion, 3.3V/5V system rails, and wide-input industrial supplies. |
| Boost Output Range | 5V to 17V - configurable via external resistor divider on FBB pin; 12V @ 470mA typical for column driver biasing. |
| VON Output Range | 8V to 40V - regulated positive gate drive voltage for TFT source drivers; set via R11/R12 on FBP pin. |
| VOFF Output Range | –5V to –40V - regulated negative common electrode voltage; set via R21/R22 on FBN pin. |
| Switching Frequency | 200 kHz to 1000 kHz - externally adjustable via ROSC resistor; enables optimization of inductor size vs. EMI. |
| Peak Switch Current | 1.75 A - internal NFET current limit defines maximum inductor peak current and output capability under load transients. |
| Operating Temperature | –40°C to +85°C - fully specified across industrial temperature range for embedded display modules. |
Pinout & Package
EL7583IR-T7 is housed in a 20-lead TSSOP package (MDP0044), RoHS-compliant, with exposed thermal pad not connected internally. Pin functions are validated per FN7335 Rev 5.00 datasheet, Page 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSSB (Pin 1) | Ground reference | Substrate and analog ground for boost regulator and internal references; must be star-connected to PGND at single point. |
| SS (Pin 2) | Soft-start control | External capacitor sets current-limited start time; prevents inrush into large output capacitors during power-up. |
| FBB (Pin 3) | Boost feedback input | Divides VBOOST to match 1.300 V internal reference; determines final regulated boost output voltage. |
| VDDB (Pin 4) | Boost supply input | Primary power rail for boost circuitry; accepts 2.7V–17V; decoupled with 0.1 µF ceramic near pin. |
| LX (Pins 5–7) | Boost switch node | Drain of internal NFET; connects to inductor and Schottky diode anode; high dv/dt node requiring short PCB traces. |
| DRVN (Pin 8) | Negative pump driver | Switching output driving external diode-capacitor network for VOFF generation; complements VDDN supply. |
| VDDN (Pin 9) | VOFF supply input | Positive input for negative charge pump; typically tied to VBOOST; must be decoupled locally. |
| FBN (Pin 10) | VOFF feedback input | Senses divided VOFF to regulate against internal ±80 mV reference; sets final negative output voltage. |
| VSSP (Pin 11) | Charge pump ground | Common return for both VON and VOFF charge pumps; isolated from VSSB in layout to reduce noise coupling. |
| FBP (Pin 12) | VON feedback input | Senses divided VON to regulate against 1.310 V internal reference; determines positive gate drive level. |
| VDDP (Pin 13) | VON supply input | Positive input for positive charge pump; typically tied to VBOOST; requires local 0.1 µF bypass. |
| DRVP (Pin 14) | Positive pump driver | Switching output driving external diode-capacitor network for VON generation; complements VDDP supply. |
| PGND (Pins 15–16) | Power ground | Source connection of internal NFET; carries high pulsed currents; must be low-inductance plane tied to LX return path. |
| VREF (Pin 17) | Reference voltage | 1.31 V internal reference for charge pumps; requires 0.1 µF ceramic bypass to VSSB for stability. |
| ENBN (Pin 18) | Enable for boost & VOFF | Active-high logic input; controls startup sequence of primary boost and negative pump; threshold 1.6 V min. |
| ENP (Pin 19) | Enable for VON | Independent active-high enable for positive pump; allows staggered VON activation after VBOOST stabilizes. |
| ROSC (Pin 20) | Frequency set resistor | Connects to ground via resistor (60kΩ–240kΩ); sets switching frequency per f = 1/(0.0118×R+0.378) kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Triple-output architecture | Single-chip solution replaces three discrete regulators-reducing BOM count, board area, and startup coordination complexity in TFT-LCD timing systems. |
| Adjustable soft-start | Capacitor-controlled ramp on SS pin ensures monotonic VBOOST rise without overshoot, critical for avoiding LCD pixel charging faults. |
| Independent VON/VOFF enables | Separate ENP and ENBN pins allow precise sequencing-e.g., VBOOST → VON → VOFF-to prevent latch-up in TFT gate driver ICs. |
| High-efficiency boost stage | Over 90% efficiency at 12V/470mA (VIN=5V) minimizes thermal load in space-constrained display modules and extends battery life in portable devices. |
| Integrated over-temperature protection | Automatic shutdown at 130°C with 40°C hysteresis prevents thermal runaway during sustained high-load operation or poor heatsinking. |
Applications
| Column Driver Power Supply | TFT Gate Driver Bias |
|---|---|
Use Scenario: Powers column (source) driver ICs in 10.4"–15.6" TFT-LCD panels requiring stable 12V–15V at up to 470mA. IC Role / Device Role / Timing Role: EL7583IR-T7 acts as the primary high-current boost regulator, delivering regulated VBOOST directly to driver IC VDD pins. Use Value: Eliminates need for external boost controller + MOSFET + diode, reducing component count by ≥7 parts and improving power density. | Use Scenario: Generates VON (18V–25V) and VOFF (–6V to –10V) for gate (scan) driver ICs in automotive instrument clusters. IC Role / Device Role / Timing Role: EL7583IR-T7 provides independently regulated positive and negative gate bias voltages synchronized to VBOOST. Use Value: Enables precise gate-on/gate-off voltage control essential for fast pixel response and reduced crosstalk in high-resolution displays. |
| Portable Display Module | Industrial HMI Panel |
Use Scenario: Powers full TFT-LCD subsystem (backlight not included) in handheld medical PDAs with 3.3V/5V battery input. IC Role / Device Role / Timing Role: EL7583IR-T7 serves as the central multi-rail power manager, coordinating VBOOST, VON, and VOFF startup via ENP/ENBN sequencing. Use Value: Achieves >90% efficiency across 3.3V–5V input range, extending battery runtime while maintaining tight regulation under dynamic load steps. | Use Scenario: Supplies display power in factory-floor HMIs operating in –40°C to +85°C ambient with vibration and EMI exposure. IC Role / Device Role / Timing Role: EL7583IR-T7 delivers robust triple-rail output with over-temperature shutdown and wide-input tolerance for unregulated 12V DC supplies. Use Value: Full industrial temp rating and thermal protection ensure continuous operation in harsh environments without derating or forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TFT-LCD display supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65105RGER | Single 20-pin WQFN; integrates LDOs for VCOM/VGH/VGL but lacks adjustable VBOOST; fixed 1.2 MHz switching. | Targeted at smaller panels (<7") with lower current needs; no soft-start adjustment; less flexible feedback configuration. | Select when fixed-frequency, compact footprint, and integrated LDOs outweigh need for adjustable VBOOST and independent pump enables. |
| MAX1623EAP+ | 28-pin SSOP; offers higher VBOOST current (600mA @ 15V) and wider VON/VOFF ranges (±45V); includes I²C interface for dynamic voltage scaling. | Designed for larger industrial displays and test equipment requiring programmable outputs and telemetry; higher cost and complexity. | Select when >470mA VBOOST, extended voltage ranges, or digital control are required-accepting larger package and added firmware overhead. |
Compared with TPS65105RGER, EL7583IR-T7 provides adjustable soft-start, independent pump enables, and wider VBOOST adjustability-critical for reliable startup in variable-panel designs. Against MAX1623EAP+, EL7583IR-T7 offers simpler analog control, lower cost, and proven suitability for mid-size consumer TFT-LCDs without I²C infrastructure.
Availability
EL7583IR-T7 is available at Aetrix Electronics and suitable for TFT-LCD panel manufacturing, portable medical PDA development, and industrial HMI design requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for EL7583IR-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 panel power systems, integrating boost conversion and dual regulated charge pumps to replace discrete solutions in space- and efficiency-constrained display modules.
FAQ
What is the maximum output current capability of the EL7583IR-T7 boost converter at 15V output?
The EL7583IR-T7 boost converter delivers up to 370mA at 15V output when supplied from a 5V input, as specified in the FN7335 datasheet Absolute Maximum Ratings and Typical Performance Curves. This value assumes proper thermal management, recommended 10µH inductor, and MBRM120 Schottky diode. At higher ambient temperatures or with suboptimal layout, derating may be necessary to maintain regulation and avoid thermal shutdown.
Can the EL7583IR-T7 generate VON and VOFF simultaneously, and how is sequencing controlled?
Yes, the EL7583IR-T7 can generate VON and VOFF simultaneously, but sequencing is fully controllable via dedicated enable pins: ENBN activates both the boost converter and VOFF pump, while ENP independently enables the VON pump. This allows precise startup order-e.g., bring up VBOOST first, then assert ENP after stabilization to activate VON, followed by VOFF if needed-preventing latch-up in gate driver ICs and ensuring safe biasing of TFT pixel transistors.
What is the function of the ROSC pin on the EL7583IR-T7, and what resistor value sets 650 kHz switching frequency?
The ROSC pin on the EL7583IR-T7 sets the boost converter's switching frequency by connecting an external resistor to ground. Per the datasheet's Figure 13 and formula f = 1/(0.0118×R + 0.378) kHz, a 100 kΩ resistor yields 620–750 kHz (typical 680 kHz), making it appropriate for targeting ~650 kHz. This frequency balances inductor size, efficiency, and EMI performance in TFT-LCD power designs.
Does the EL7583IR-T7 include overvoltage protection on its VBOOST, VON, or VOFF outputs?
No, the EL7583IR-T7 does not include dedicated overvoltage protection (OVP) circuitry on VBOOST, VON, or VOFF outputs. It relies solely on closed-loop feedback regulation (via FBB, FBP, FBN pins) and internal current limiting (1.75 A peak switch current) for fault containment. External OVP clamps or supervisors must be added if system-level overvoltage tolerance exceeds ±5% of nominal output settings.
What package type and lead finish does the EL7583IR-T7 use, and is it RoHS compliant?
The EL7583IR-T7 uses a 20-lead TSSOP package (MDP0044) with standard matte tin lead finish and is RoHS compliant per Intersil's Pb-free plus anneal process. It meets IPC/JEDEC J-STD-020 reflow requirements for both SnPb and lead-free soldering, with MSL rating appropriate for the package variant. The tape-and-reel format (7-inch reel) supports automated SMT assembly.
EL7583IR-T7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- 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-TSSOP
EL7583IR-T7 FAQ
1.How can I place an order for EL7583IR-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7583IR-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 EL7583IR-T7 reliable?
The price and inventory of EL7583IR-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7583IR-T7 is usually 5 days.
3.What payment methods are accepted for EL7583IR-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7583IR-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7583IR-T7?
EL7583IR-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7583IR-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 EL7583IR-T7?
For technical support, including EL7583IR-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7583IR-T7 requirements.
6.How does Aetrix verify that EL7583IR-T7 is sourced from the original manufacturer or authorized distributors?
All EL7583IR-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 EL7583IR-T7 meets industry standards.
7.What is the process for return or replacement of EL7583IR-T7?
All EL7583IR-T7 units undergo pre-shipment inspection (PSI). If there is an issue with EL7583IR-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 EL7583IR-T7 part is unused and in its original packaging.
Return procedure for EL7583IR-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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