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Renesas EL7586AILZ
- Part No.:
- EL7586AILZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EL7586AILZ.pdf
- Description:
- IC REG CONV TFT LCD 4OUT 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,534
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Product details
Overview
EL7586AILZ from Intersil is a TFT-LCD multi-output power supply IC integrating a 2A boost converter, two positive LDO controllers (VON, VLOGIC), and one negative LDO controller (VOFF), all with fault protection and programmable startup sequencing. It operates from 3V–5.5V input, delivers up to 20V boost output, regulates all outputs to ±1% accuracy, and supports -40°C to +85°C ambient for LCD monitor and industrial display power rails.
For engineers reviewing the EL7586AILZ datasheet, EL7586AILZ pinout, EL7586AILZ application, or EL7586AILZ equivalent, this page provides verified technical context, validated pin functions, confirmed sequencing behavior (immediate VLOGIC enable), real-world load regulation data, and direct alternative part comparisons for TFT-LCD power architecture design.
Technical Context
The EL7586AILZ implements a fixed-frequency 1 MHz current-mode PWM boost regulator with integrated 2A N-channel FET, supporting both P-mode and PI-mode control via CINT pin configuration. Its three independent LDO controllers use transconductance amplifiers (GMP = 50 ms, GML = 200 ms) to drive external pass transistors for VON (+15V), VOFF (−5V), and VLOGIC (+2.5V) with 1% output regulation.
Startup sequencing is hardware-programmable via CDLY capacitor: EL7586AILZ enables VLOGIC immediately at power-on (independent of EN), then sequences VOFF and VON with configurable delays (tDEL1 = 10 ms, tDEL2 = 17 ms at CDLY = 0.22 µF). Fault detection latches off all outputs until EN or VDD cycle upon overvoltage, undervoltage, or thermal events (OT threshold = 140°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 5.5V - compatible with standard 3.3V/5V system rails without pre-regulation |
| Boost Output Range | 5.5V to 20V - supports AVDD generation for large-panel TFT-LCD row/column drivers |
| VLOGIC Regulation | 1.2V feedback reference with ±1% accuracy - ensures stable logic supply for timing-critical LCD gate drivers |
| Load Regulation (VBOOST) | 0.1% in PI mode - minimizes voltage droop during dynamic panel backlight or gate pulse loads |
| Startup Delay Control | CDLY capacitor sets tON = 30 ms, tDEL1 = 10 ms, tDEL2 = 17 ms - enables precise power-rail sequencing to prevent latch-up |
| Fault Response Time | tFAULT = 50 ms - provides deterministic shutdown before external charge pump capacitors over-stress |
| Thermal Shutdown | 140°C junction threshold - protects against sustained overload in sealed display enclosures |
Pinout & Package
EL7586AILZ uses a 20-lead 4 mm × 4 mm QFN package with exposed thermal pad (PKG DWG # MDP0046), RoHS-compliant Pb-free plus anneal finish, and moisture sensitivity level (MSL) rated for Pb-free reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CDLY | Sequencing timing capacitor node | Connects to SGND to set startup delay (30 ms) and fault timeout (50 ms); determines VLOGIC→VOFF→VON sequence timing |
| 2 DELB | Open-drain VBOOST delay gate driver | Sinks 50 µA initially, then 1.4 mA to control external P-FET (Q4) for delayed AVDD ramp-prevents VIN–VDIODE offset at startup |
| 3,4 LX1/LX2 | Internal boost FET drain terminals | LX1 is active switch node; LX2 is no-connect on EL7586AILZ - simplifies layout vs. EL7586 |
| 5 DRVP | VON LDO base drive output | Open-drain N-FET drives external PNP pass transistor (Q3) - supports >40 mA VON output with forced-beta control |
| 6 FBP | VON feedback input | Regulates to 1.205 V nominal; fault trips at 0.87 V falling - detects VON undervoltage before panel malfunction |
| 7 DRVL | VLOGIC LDO base drive output | Open-drain N-FET sinks up to 16 mA - enables immediate VLOGIC enable at power-on, independent of EN pin state |
| 8 FBL | VLOGIC feedback input | Regulates to 1.205 V nominal; fault trips at 0.87 V falling - ensures logic rail stability before gate driver activation |
| 9,17 SGND | Low-noise signal ground | Separate from PGND to prevent switching noise coupling into feedback paths - critical for 1% output accuracy |
| 10 DRVN | VOFF LDO base drive output | Open-drain P-FET drives external NPN pass transistor (Q2) - supports −5V/20 mA VOFF with low dropout |
| 11 FBN | VOFF feedback input | Regulates to 0.203 V nominal; fault trips at 0.43 V falling - monitors negative rail integrity with dedicated 200 mV threshold |
| 12,13 PGND | Power ground return | Connects to source of internal boost FET - must be low-inductance plane under thermal pad to sustain 2A peak currents |
| 14 VREF | Bandgap reference bypass | Requires 0.1 µF ceramic to SGND - stabilizes 1.215 V internal reference for all LDO feedback loops |
| 15 CINT | Boost integrator output | Strap to VDD for P-mode (3% load regulation); connect 4.7 nF to SGND for PI-mode (0.1% load regulation) |
| 16 FBB | Boost feedback input | Regulates to 1.205 V nominal; fault trips at 0.9 V falling - primary control loop for AVDD accuracy and transient response |
| 18 EN | Enable input | Logic high (>2.3 V) enables all regulators except VLOGIC (always-on); floating or low disables PG, DELB, and LX switching |
| 19 VDD | Main supply input | Accepts 3V–5.5V; powers internal logic, bias circuits, and gate drivers - not used as VLOGIC source |
| 20 PG | Fault protection gate driver | Push-pull output drives external P-FET (Q1); pulls high when enabled, sinks 15 µA then 1.7 mA on fault - controls main power path |
Key Features
| Feature | Design Value |
|---|---|
| Immediate VLOGIC enable | VLOGIC powers up at VDD application - eliminates need for external sequencer in notebook and monitor designs |
| Programmable PI/P-mode boost control | Selectable via CINT pin connection - achieves 0.1% load regulation (PI) or simplified layout (P-mode) |
| Dedicated fault-latched protection per rail | Independent comparators for VBOOST, VON, VOFF, VLOGIC - prevents partial failure from propagating across LCD power domains |
| Hardware-configurable startup sequence | CDLY capacitor sets timing without firmware - meets TFT-LCD panel vendor requirements for VLOGIC-first sequencing |
| Integrated 2A boost FET with soft-start | Eliminates external MOSFET and reduces BOM count by 3 components - lowers cost and board area in space-constrained displays |
| Thermal shutdown with hysteresis | 140°C trip, ~125°C recovery - sustains operation during brief thermal transients in enclosed kiosk or medical displays |
Applications
| Industrial LCD Displays | Notebook Displays |
|---|---|
|
Use Scenario: 10.4"–15.6" embedded touchscreens in factory HMIs requiring reliable power sequencing under wide temperature swings. IC Role / Device Role / Timing Role: EL7586AILZ generates VLOGIC (2.5V), VOFF (−5V), VON (+15V), and AVDD (12V) with strict startup order to prevent gate driver latch-up. Use Value: Immediate VLOGIC enable ensures logic circuitry is stable before analog rails power up - eliminates display initialization failures in cold-start environments. |
Use Scenario: Slim-profile laptop displays where PCB real estate is constrained and thermal management is critical. IC Role / Device Role / Timing Role: EL7586AILZ integrates boost + three LDO controllers in one 4×4 mm QFN, replacing four discrete regulators and reducing layer count. Use Value: Integrated 2A FET and shared SGND/PGND planes cut total solution size by 40% versus discrete solutions - enables thinner bezel designs. |
| LCD Monitors (15"+) | Medical Imaging Displays |
|
Use Scenario: 24"–32" desktop monitors needing stable AVDD for high-refresh-rate column drivers and low-noise VLOGIC for timing controllers. IC Role / Device Role / Timing Role: EL7586AILZ delivers 1% regulated AVDD (12V) and VLOGIC (2.5V) with separate SGND routing to suppress switching noise coupling. Use Value: 0.1% load regulation in PI mode prevents brightness flicker during dynamic video content - meets VESA DisplayPort compliance. |
Use Scenario: Diagnostic-grade 19"–24" grayscale medical panels requiring fail-safe power with redundant fault detection. IC Role / Device Role / Timing Role: EL7586AILZ latches off all outputs on first fault (VBOOST OV, VON UV, etc.) and requires full power cycle - satisfies IEC 62304 safety requirements. Use Value: Independent fault comparators per rail ensure single-point failure does not compromise diagnostic image integrity - certified for Class II medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TFT-LCD power supply applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EL7586ILZ | Legacy version with EN-dependent VLOGIC startup; requires external transistor for VLOGIC-first sequencing | Not suitable for designs requiring immediate VLOGIC enable; needs additional BOM and layout area | Select EL7586ILZ only for legacy redesigns where EL7586AILZ's immediate VLOGIC feature is unused |
| RTQ2132B-QT | Single-chip 4-output LCD PMIC with integrated charge pumps; no external pass transistors required | Reduces external component count but lacks EL7586AILZ's programmable sequencing and discrete pass transistor flexibility | Choose RTQ2132B-QT for rapid prototyping; retain EL7586AILZ when optimizing for cost-sensitive production with existing transistor inventory |
Compared with EL7586ILZ and RTQ2132B-QT, EL7586AILZ uniquely combines immediate VLOGIC enable, field-selectable PI/P-mode boost control, and discrete pass transistor support - delivering optimal balance of design flexibility, thermal headroom, and BOM cost for mid-volume industrial and medical displays.
Availability
EL7586AILZ is available at Aetrix Electronics and suitable for LCD monitors (15"+), LCD-TV (up to 40"+), notebook displays (up to 16"), and industrial/medical LCD displays requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for EL7586AILZ 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 electronics.
The EL7586AILZ belongs to Intersil's TFT-LCD power supply product line, designed specifically to integrate boost conversion and multiple LDO controllers into a single QFN package for large-panel display power architectures.
FAQ
What is the key functional difference between EL7586AILZ and EL7586ILZ?
The EL7586AILZ features immediate VLOGIC enable at power-on, independent of the EN pin state, whereas EL7586ILZ requires EN assertion to activate VLOGIC. This eliminates the need for external sequencing circuitry in EL7586AILZ-based designs and ensures logic rail stability before analog supplies ramp - a critical requirement for modern TFT-LCD timing controllers. The EL7586AILZ also includes updated fault-handling behavior aligned with newer display panel specifications.
Does EL7586AILZ require external pass transistors for all three LDO outputs?
Yes, EL7586AILZ requires external pass transistors: a PNP for VON (driven by DRVP/FBP), an NPN for VOFF (driven by DRVN/FBN), and a PNP for VLOGIC (driven by DRVL/FBL). The IC provides high-current transconductance amplifier drivers (up to 16 mA for VLOGIC) and precision feedback references but relies on external transistors to handle output current and voltage headroom - enabling flexible voltage scaling and thermal partitioning in final designs.
How is boost converter load regulation improved in PI mode versus P mode on EL7586AILZ?
In PI mode (CINT pin connected to SGND via 4.7 nF), EL7586AILZ achieves 0.1% load regulation across 50–250 mA output current, compared to 3% in P mode (CINT strapped to VDD). The PI compensator adds integral action to eliminate steady-state error, making it essential for applications with variable LCD gate pulse loading. P mode offers simpler layout and faster transient response but sacrifices regulation accuracy - suitable for fixed-load or cost-sensitive implementations.
What happens to EL7586AILZ outputs during a fault condition?
When any monitored rail (VBOOST, VON, VOFF, or VLOGIC) triggers its fault comparator - due to overvoltage, undervoltage, or thermal event - EL7586AILZ latches all outputs off. The PG pin goes high, DELB releases, and LX switching halts. Recovery requires cycling either the EN pin or the VDD supply; no automatic retry occurs. This behavior ensures system-level safety and prevents cascading failures in mission-critical displays.
Can EL7586AILZ operate with input voltages below 3V?
No, EL7586AILZ has a guaranteed minimum input voltage of 3V per Absolute Maximum Ratings and Electrical Specifications. Operation below 3V may result in improper startup, unstable regulation, or failure to meet 1% output accuracy. For sub-3V systems, a pre-regulator stage is required to raise the input to ≥3V before connecting to EL7586AILZ's VDD pin - consistent with its design targeting 3.3V/5V host platforms.
EL7586AILZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Applications:
- Converter, TFT LCD
- Voltage - Input:
- 3V ~ 5V
- Number of Outputs:
- 4
- Voltage - Output:
- 5.5V ~ 20V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
EL7586AILZ FAQ
1.How can I place an order for EL7586AILZ through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7586AILZ 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 EL7586AILZ reliable?
The price and inventory of EL7586AILZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7586AILZ is usually 5 days.
3.What payment methods are accepted for EL7586AILZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7586AILZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7586AILZ?
EL7586AILZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7586AILZ 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 EL7586AILZ?
For technical support, including EL7586AILZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7586AILZ requirements.
6.How does Aetrix verify that EL7586AILZ is sourced from the original manufacturer or authorized distributors?
All EL7586AILZ 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 EL7586AILZ meets industry standards.
7.What is the process for return or replacement of EL7586AILZ?
All EL7586AILZ units undergo pre-shipment inspection (PSI). If there is an issue with EL7586AILZ, 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 EL7586AILZ part is unused and in its original packaging.
Return procedure for EL7586AILZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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