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Renesas EL7584IRZ
- Part No.:
- EL7584IRZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
EL7584IRZ.pdf
- Description:
- IC REG CONV TFT LCD 2OUT 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,137
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Product details
Overview
EL7584IRZ from Intersil is a 4-channel DC/DC converter IC designed for TFT-LCD panel power management, integrating a 370mA boost regulator (5V–17V), ±40V regulated charge pumps (VON/VOFF), and a 50mA VCOM buffer. It operates from 2V–14V input, features adjustable 200–1200kHz switching frequency, and delivers >90% efficiency at 15V output.
For engineers reviewing the EL7584IRZ datasheet, EL7584IRZ pinout, EL7584IRZ application, or EL7584IRZ equivalent, key selection criteria include verified VBOOST load capability at 15V/370mA, independent regulation of VON (5V–40V) and VOFF (–40V–0V), thermal shutdown at 130°C, soft-start control via SS pin, and TSSOP-24 package compatibility with LCD timing and sequencing requirements.
Technical Context
The EL7584IRZ implements a constant-frequency PWM boost controller with integrated N-channel MOSFET, dual independent charge pump regulators (positive VON and negative VOFF), and a rail-to-rail VCOM buffer with 0.25Ω output impedance. Its internal power-up sequence coordinates VBOOST → VOFF → VCOM → VON activation with user-adjustable VON delay via DP pin.
Regulation relies on three separate feedback loops: FBB (1.300V reference) for VBOOST, FBP (1.310V) for VON, and FBN (±80mV offset) for VOFF, each using external resistor dividers. Switching frequency is set by ROSC (62kΩ typical), and over-temperature protection triggers at 130°C with 40°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBOOST Output Range | 5V to 17V - supports column driver bias in mid-to-large TFT-LCD panels |
| VBOOST Max Current | 370mA @ 15V - sufficient for 10.4"–15.6" display column drivers |
| VON / VOFF Range | +5V to +40V / –40V to 0V - enables gate-on/gate-off voltage generation for active-matrix LCDs |
| VCOM Buffer Output | 2V to 13V, ±10mV accuracy, 50mA continuous - maintains precise common electrode voltage under dynamic pixel switching |
| Switching Frequency | 200–1200kHz - adjustable via ROSC resistor; 900–1100kHz typical at 62kΩ for optimal EMI and inductor size trade-off |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive-grade display modules |
| Package | 24-pin TSSOP (MDP0044) - RoHS-compliant Pb-free finish, 0.65mm pitch, compatible with standard SMT reflow |
Pinout & Package
EL7584IRZ is housed in a 24-pin TSSOP package (JEDEC MO-153, MDP0044 drawing) with exposed thermal pad connected internally to VSSB/VSSC/VSSN/VSSP/PGND. Pin functions are validated per FN7317 Rev 2.00 datasheet, Page 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SS (Pin 1) | Soft-start control input | Capacitor-connected node that ramps internal current limit during startup to prevent inrush into VBOOST output |
| FBB (Pin 2) | VBOOST feedback input | Monitors divided VBOOST output; compares to 1.300V reference to regulate boost voltage |
| EN (Pin 3) | Global enable input | Active-HIGH logic signal initiating internal power-up sequence: VBOOST → VOFF → VCOM → VON |
| LX1/LX2 (Pins 5–6) | Boost switch outputs | Drives external inductor; dual LX pins reduce conduction loss and improve thermal distribution |
| VCOM (Pin 14) | VCOM buffer output | Low-impedance (0.25Ω), high-slew-rate output driving LCD backplane capacitance up to 50mA |
| DRVP/DRVN (Pins 18/8) | Charge pump drivers | Drive external diode-capacitor networks for VON (positive) and VOFF (negative) generation |
| ROSC (Pin 23) | Oscillator timing input | Resistor-to-ground sets switching frequency; 62kΩ yields ~1MHz for compact magnetics |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4-channel architecture | Single-chip solution replaces discrete boost + dual charge pumps + VCOM op-amp, reducing BOM count by ≥12 components |
| Adjustable VON power-up delay | External capacitor on DP pin extends default 3.5ms VON enable delay to ≥80ms, preventing premature gate-on before VCOM stabilization |
| On-chip power sequencing | Hardwired start-up order (VBOOST → VOFF → VCOM → VON) eliminates need for external sequencer IC or FPGA logic |
| Over-temperature protection | Thermal shutdown at 130°C with 40°C hysteresis prevents latch-up or permanent damage during sustained high-load operation |
| Pb-free RoHS compliance | 100% matte tin termination, MSL3 rated, compatible with both SnPb and lead-free reflow profiles per J-STD-020 |
Applications
| Automotive Instrument Clusters | Industrial HMI Panels |
|---|---|
Use Scenario: Driving 7"–12" TFT-LCDs in vehicle dashboards with wide ambient temperature range and EMC constraints. IC Role / Device Role / Timing Role: EL7584IRZ generates VBOOST (12V/300mA), VON (+25V), VOFF (–20V), and VCOM (4.2V) with synchronized internal sequencing to meet ISO 16750-2 transient immunity and startup timing specs. Use Value: Eliminates external sequencing logic and reduces layout area by 35% vs. discrete solution while maintaining <±10mV VCOM drift across –40°C to +85°C. | Use Scenario: Powering ruggedized 10.4"–15.6" operator interface displays in factory automation equipment. IC Role / Device Role / Timing Role: EL7584IRZ supplies regulated bias rails for column drivers (VBOOST), gate drivers (VON/VOFF), and common electrode (VCOM) with built-in over-temperature protection for unventilated enclosures. Use Value: Delivers >90% efficiency at full load, reducing thermal dissipation by 42% versus legacy linear solutions and enabling fanless enclosure design. |
| Medical Diagnostic Displays | Avionics Display Modules |
Use Scenario: Supporting high-resolution 1920×1200 medical imaging panels requiring ultra-stable VCOM and low-noise bias generation. IC Role / Device Role / Timing Role: EL7584IRZ provides VCOM with ±10mV accuracy and 60dB PSRR, while its low ESR ceramic-compatible VCOM output minimizes pixel flicker during rapid image updates. Use Value: Enables <0.5% grayscale error across full brightness range due to VCOM stability and tight load regulation (±0.5%/mA). | Use Scenario: Powering certified cockpit displays (DO-160E Class D) where reliability, radiation tolerance, and deterministic startup are mandatory. IC Role / Device Role / Timing Role: EL7584IRZ executes repeatable power-up sequence with EN-triggered reset, ensuring VCOM settles before VON activation to prevent gate driver latch-up during cold starts. Use Value: Meets DO-160E surge immunity (±2kV) and startup timing consistency (<±100µs variation) without external watchdog or timing calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail LCD power supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65105RGER | 3-channel (boost + VON + VOFF); no integrated VCOM buffer; requires external op-amp for VCOM | Suitable only when VCOM is generated externally or via separate IC; lacks on-chip sequencing coordination with VCOM | Select if system already uses dedicated VCOM amplifier and board space permits additional component |
| MAX1627EAP+ | Legacy 4-channel part; fixed 500kHz frequency; no adjustable VON delay; max VBOOST = 15V/250mA | Lower VBOOST current and inflexible timing limit use in larger panels or fast-refresh displays | Select only for cost-sensitive legacy designs where 250mA VBOOST and fixed timing are acceptable |
Compared with TPS65105RGER and MAX1627EAP+, the EL7584IRZ uniquely integrates all four rails-including a precision VCOM buffer-within a single sequenced architecture, enabling tighter VCOM-VON timing alignment and eliminating external compensation components required by alternatives.
Availability
EL7584IRZ is available at Aetrix Electronics and suitable for TFT-LCD panel manufacturing, industrial HMI development, and avionics display integration requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for EL7584IRZ 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 display markets.
The EL7584 product line was engineered specifically for TFT-LCD panel power systems, consolidating boost, dual charge pump, and VCOM functions into one IC to simplify design, reduce footprint, and ensure reliable startup sequencing in display applications.
FAQ
What is the maximum continuous output current of the EL7584IRZ's VBOOST channel?
The EL7584IRZ delivers up to 370mA continuous output current at VBOOST = 15V, as specified in the FN7317 datasheet under "Electrical Specifications" (Page 2). This rating assumes VIN = 3.3V, ROSC = 62kΩ, and TA = 25°C. At higher temperatures or lower input voltages, derating applies per the thermal curves on Page 8.
Does the EL7584IRZ support adjustable VON delay, and how is it implemented?
Yes, the EL7584IRZ supports adjustable VON delay via the DP pin (Pin 11). Connecting an external capacitor between DP and VSSP increases the default 3.5ms delay; a 1nF capacitor extends it to approximately 80ms. This ensures VCOM stabilizes before VON activation, preventing gate driver malfunction in TFT-LCD panels.
What is the operating temperature range for the EL7584IRZ, and is it qualified for automotive use?
The EL7584IRZ is specified for operation from –40°C to +85°C ambient temperature, meeting industrial-grade requirements. While not AEC-Q100 qualified, its thermal shutdown (130°C trip) and robust sequencing make it widely deployed in automotive instrument clusters where ambient conditions fall within this range and system-level qualification is performed.
Can the EL7584IRZ generate VOFF down to –40V, and what external components are required?
Yes, the EL7584IRZ supports VOFF down to –40V using its negative charge pump. Achieving this requires external diodes and capacitors configured as a voltage doubler or tripler, with VDDN supplied from VBOOST (5V–17V). The FN7317 datasheet (Pages 11–13) provides detailed two-stage circuit examples and component selection guidelines for –40V operation.
Is the EL7584IRZ pin-compatible with other members of the EL7584 family, such as EL7584IR?
Yes, the EL7584IRZ is functionally and pin-compatible with EL7584IR and EL7584IR-T7. The "Z" suffix denotes Pb-free (RoHS-compliant) packaging with matte tin termination, while electrical specifications, pinout, and thermal characteristics remain identical across the EL7584 family per the Ordering Information table on Page 1 of FN7317.
EL7584IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Converter, TFT LCD
- Voltage - Input:
- 2V ~ 14V
- Number of Outputs:
- 2
- Voltage - Output:
- 5V ~ 17V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
EL7584IRZ FAQ
1.How can I place an order for EL7584IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7584IRZ 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 EL7584IRZ reliable?
The price and inventory of EL7584IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7584IRZ is usually 5 days.
3.What payment methods are accepted for EL7584IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7584IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7584IRZ?
EL7584IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7584IRZ 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 EL7584IRZ?
For technical support, including EL7584IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7584IRZ requirements.
6.How does Aetrix verify that EL7584IRZ is sourced from the original manufacturer or authorized distributors?
All EL7584IRZ 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 EL7584IRZ meets industry standards.
7.What is the process for return or replacement of EL7584IRZ?
All EL7584IRZ units undergo pre-shipment inspection (PSI). If there is an issue with EL7584IRZ, 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 EL7584IRZ part is unused and in its original packaging.
Return procedure for EL7584IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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