My Inquiry
My Account
Renesas EL7520ILZ-T7
- Part No.:
- EL7520ILZ-T7
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EL7520ILZ-T7.pdf
- Description:
- IC REG CTRLR TFT 4OUT 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,935
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
EL7520ILZ-T7 from Intersil is a 4-channel DC/DC controller for TFT-LCD power systems, integrating a 1MHz PWM boost controller (VBOOST), and three LDO controllers for VON (+15V), VOFF (−5V), and VLOGIC (2.5V). It operates from 3V to 5.5V input, supports programmable P/PI-mode control, and delivers fault-latched protection across all outputs - deployed in 15"+ LCD monitors and industrial displays.
For engineers reviewing the EL7520ILZ-T7 datasheet, EL7520ILZ-T7 pinout, EL7520ILZ-T7 application, or EL7520ILZ-T7 equivalent, key selection considerations include its 20-lead 4×4 QFN package, −40°C to +85°C operation, integrated start-up sequencing with CDLY-programmable delays, and compatibility with external N/P-channel FETs for scalable output current.
Technical Context
The EL7520ILZ-T7 implements a fixed-frequency (900–1100 kHz) current-mode PWM boost controller with slope compensation, supporting continuous or discontinuous conduction mode. Its CINT pin selects between P-mode (fast transient response) and PI-mode (0.1% load regulation) via connection to VREF or GND.
Three independent LDO controllers use transconductance amplifiers (GMP = 50 mS, GMN = 50 mS, GML = 200 mS) driving external pass transistors: DRVP/DRVL sink up to 4 mA/16 mA for VON/VLOGIC; DRVN sources up to 4 mA for VOFF. Fault detection includes under-voltage trip points at FBP (1.0 V), FBN (0.4 V), and FBL (1.0 V), with latched shutdown until EN or VDD cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3V to 5.5V - powers internal circuitry and enables operation across standard logic rails. |
| Oscillator Frequency | 900–1100 kHz - enables compact 6.8 µH inductor and multilayer ceramic capacitor designs. |
| VBOOST Regulation Ref | 1.19–1.238 V at FBB - sets main column driver voltage via external resistor divider. |
| VON LDO Ref Voltage | 1.177–1.233 V at FBP - regulates positive row driver supply with ±0.5% load regulation. |
| VOFF LDO Ref Voltage | 0.171–0.235 V at FBN - regulates negative row driver supply with −0.15% load regulation. |
| VLOGIC LDO Ref Voltage | 1.174–1.226 V at FBL - regulates panel logic supply with −0.5% load regulation up to 500 mA. |
| Fault Timeout | 50 ms with 0.1 µF CDLY - ensures stable startup before enabling next rail in sequence. |
Pinout & Package
EL7520ILZ-T7 is housed in a 20-lead 4×4 mm QFN package (MDP0046) with 0.5 mm pitch and exposed thermal pad. Package height is ≤0.9 mm, rated for −40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CDLY (1) | Startup delay & fault timeout timing | Capacitor-to-GND sets sequence timing (e.g., 0.1 µF → 30 ms turn-on delay). |
| DRVB (2) | Boost gate driver output | Drives external N-channel FET gate; voltage follows VIN during switching. |
| PGND (3) | Power ground return | Separate low-impedance path for high-current boost switch node return. |
| ISAD (4) | Current limit programming | Resistor-to-GND sets MOSFET peak current threshold via internal 8 kΩ reference. |
| ISIN (5) | Current sense input | Senses drain voltage of external N-FET to enable cycle-by-cycle current limiting. |
| DELB (6) | Delayed VBOOST enable control | Active-low open-drain output to drive external P-FET for delayed VBOOST ramp. |
| SGND (7) | Signal ground reference | Low-noise analog ground for feedback pins (FBB/FBN/FBL/FBP) and VREF. |
| FBB (8) | Boost feedback input | Monitors VBOOST via resistor divider; trips fault if voltage falls below 1.0 V. |
| CINT (9) | Integrator output / mode select | Connect to VREF for P-mode; to GND with 2.2 nF for PI-mode load regulation. |
| VREF (10) | Bandgap reference bypass | 1.215 V nominal reference; bypassed with 0.1 µF ceramic for stability. |
| FBN (11) | VOFF feedback input | Regulates negative supply; fault trips at 0.4 V falling on FBN pin. |
| DRVN (12) | VOFF base drive output | Open-drain P-channel driver sourcing up to 4 mA for external NPN pass transistor. |
| FBL (13) | VLOGIC feedback input | Regulates logic supply; fault trips at 1.0 V falling on FBL pin. |
| DRVL (14) | VLOGIC base drive output | Open-drain N-channel driver sinking up to 16 mA for external PNP pass transistor. |
| FBP (15) | VON feedback input | Regulates positive row supply; fault trips at 1.0 V falling on FBP pin. |
| DRVP (16) | VON base drive output | Open-drain N-channel driver sinking up to 4 mA for external PNP pass transistor. |
| EN (17) | Global enable input | Active-high logic control; device disabled when pulled <0.8 V (VLO). |
| VDD (18) | Core logic supply | Powers internal bias, logic, and feedback circuitry (3–5.5 V). |
| VDDP (19) | Boost gate drive supply | Provides higher voltage rail for DRVB output swing (up to 36 V). |
| PG (20) | Fault protection gate output | Open-drain P-channel driver controlling input protection FET; high = off, low = on. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4-rail sequencing | Programmable CDLY-based timing (tON = 30 ms, tDEL1–tDEL3 = 10–17 ms) eliminates need for external sequencer ICs. |
| Configurable control loop | CINT-selectable P-mode (fast transient) or PI-mode (0.1% load regulation) adapts to dynamic panel load profiles. |
| Dual-path fault protection | Independent UVLO on each LDO feedback pin plus overtemperature (140°C) latch-off prevents system damage during rail faults. |
| In-rush current control | PG-driven external PMOS (Q1) limits VIN-to-VBOOST surge, reducing stress on input capacitors and connectors. |
| Thermal-enhanced packaging | Exposed thermal pad in 4×4 mm QFN enables >125°C junction temperature margin under full load at +85°C ambient. |
Applications
| Industrial LCD Displays | LCD Monitors (15"+) |
|---|---|
Use Scenario: Powering 10.4"–19" medical imaging panels requiring stable VON/VLOGIC/VOFF with EMI-constrained layouts. IC Role / Device Role / Timing Role: Central 4-channel controller managing synchronized startup, fault-isolated shutdown, and ripple-sensitive analog supply generation. Use Value: Eliminates discrete sequencing logic and reduces BOM count by integrating boost + three LDO controllers in one 4×4 mm footprint. | Use Scenario: Supplying column drivers (VBOOST), row drivers (VON/VOFF), and timing controllers (VLOGIC) in desktop LCD monitors. IC Role / Device Role / Timing Role: Primary power management IC coordinating multi-rail power-up with 10–17 ms inter-rail delays to prevent latch-up. Use Value: Enables single-chip solution for full TFT-LCD bias supply, cutting PCB area by >40% vs. discrete DC/DC + LDO combinations. |
| LCD-TV (up to 40"+) | Notebook Displays (up to 16") |
Use Scenario: Delivering regulated VON (+24 V), VOFF (−12 V), and VLOGIC (3.3 V) in cost-sensitive mid-size LCD TVs. IC Role / Device Role / Timing Role: High-efficiency boost + linear regulator controller supporting wide input (3–5.5 V) and extended temperature (−40°C to +85°C). Use Value: Achieves >90% boost efficiency at 400 mA with 24 mΩ RDS(ON) MOSFET, minimizing thermal design overhead. | Use Scenario: Generating panel bias rails in space-constrained notebook hinge assemblies with strict height limits (<0.9 mm). IC Role / Device Role / Timing Role: Compact QFN-packaged controller providing soft-started, fault-protected VON/VOFF/VLOGIC from battery or adapter input. Use Value: 4×4 mm × 0.9 mm profile meets ultra-thin display mechanical constraints while maintaining full rail sequencing integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TFT-LCD power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL97645A | Single-chip 4-output controller with integrated MOSFETs; no external FET required; 2.7–5.5 V input; 1.2 MHz switching. | Eliminates external boost FET, diode, and inductor - suited for lower-power panels (<15") where board space is critical. | Select ISL97645A when simplifying layout and reducing component count outweighs need for high-current scalability. |
| TPS65150RGER | TI 4-channel LCD bias IC with integrated charge pumps; supports VON up to +30 V, VOFF down to −15 V; 2.7–6.5 V input. | Uses switched-capacitor topology instead of inductive boost - better for low-EMI, fanless designs but limited to <200 mA VBOOST. | Choose TPS65150RGER for noise-sensitive medical or portable displays where inductor EMI must be avoided. |
Compared with EL7520ILZ-T7, ISL97645A reduces external component count but sacrifices output current headroom, while TPS65150RGER trades inductor-based efficiency for EMI-free charge-pump operation - both require redesign of feedback networks and sequencing timing.
Availability
EL7520ILZ-T7 is available at Aetrix Electronics and suitable for LCD monitors (15"+), LCD-TV (up to 40"+), and industrial/medical LCD displays requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for EL7520ILZ-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 display applications.
The EL7520 product line was designed specifically for TFT-LCD panel power systems, integrating boost conversion and three independent LDO controllers to replace multi-IC solutions in monitor, TV, and embedded display designs.
FAQ
What is the recommended capacitor value for the CDLY pin on the EL7520ILZ-T7?
A 0.1 µF capacitor connected from CDLY to SGND sets the standard startup timing: 30 ms turn-on delay (tON), 10 ms VOFF delay after AVDD (tDEL1), 17 ms VON delay after VOFF (tDEL2), and 10 ms delayed VBOOST activation (tDEL3). This value also configures the 50 ms fault timeout window (TFAULT). Larger values increase all delays proportionally; smaller values reduce timing margins and risk sequencing failure.
Does the EL7520ILZ-T7 support both P-mode and PI-mode operation, and how is it configured?
Yes, the EL7520ILZ-T7 supports both modes via the CINT pin. Connect CINT directly to VREF for P-mode - optimized for fast transient response in dynamic load conditions. Connect CINT to SGND through a 2.2 nF capacitor for PI-mode - delivering tighter load regulation (0.1% vs. 3%) at the expense of slower step-load recovery. Mode selection is hardware-configured and cannot be changed dynamically.
What are the absolute maximum ratings for the DRVP and DRVN pins on the EL7520ILZ-T7?
The DRVP pin has an absolute maximum rating of +36 V, while DRVN is rated for −20 V. These ratings define safe operating limits for external pass transistor base-emitter connections. Exceeding them risks permanent damage to the internal N-channel (DRVP) or P-channel (DRVN) driver stages. Designers must ensure external transistor configurations - including charge pump topologies and clamping diodes - respect these voltage boundaries under all fault and startup conditions.
How does the EL7520ILZ-T7 implement fault protection across its four output channels?
The EL7520ILZ-T7 provides independent fault detection on each regulated output: FBP (VON), FBN (VOFF), FBL (VLOGIC), and FBB (VBOOST). Each feedback pin has a dedicated comparator with defined trip thresholds (e.g., 1.0 V falling on FBP/FBL, 0.4 V falling on FBN). Upon any fault detection, the device latches off all outputs and drives PG high to disable the input protection FET. Recovery requires cycling EN or VDD - no automatic retry, ensuring system safety during sustained faults.
Is the EL7520ILZ-T7 pin-compatible with the EL7520AILZ-T7 variant?
No, the EL7520ILZ-T7 and EL7520AILZ-T7 are not pin-compatible due to differing startup behavior: the 'A' version permanently enables VLOGIC once VDD exceeds 2.5 V, while the base EL7520ILZ-T7 sequences VLOGIC only after CDLY ramp completion. Although both share identical pinouts and package, their internal sequencing logic differs - substituting one for the other without firmware/hardware revision may cause incorrect power-up order or latch-up in VLOGIC-dependent circuits.
EL7520ILZ-T7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Controller, TFT LCD
- Voltage - Input:
- 3V ~ 5.5V
- Number of Outputs:
- 4
- Voltage - Output:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
EL7520ILZ-T7 FAQ
1.How can I place an order for EL7520ILZ-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7520ILZ-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 EL7520ILZ-T7 reliable?
The price and inventory of EL7520ILZ-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7520ILZ-T7 is usually 5 days.
3.What payment methods are accepted for EL7520ILZ-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7520ILZ-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7520ILZ-T7?
EL7520ILZ-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7520ILZ-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 EL7520ILZ-T7?
For technical support, including EL7520ILZ-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7520ILZ-T7 requirements.
6.How does Aetrix verify that EL7520ILZ-T7 is sourced from the original manufacturer or authorized distributors?
All EL7520ILZ-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 EL7520ILZ-T7 meets industry standards.
7.What is the process for return or replacement of EL7520ILZ-T7?
All EL7520ILZ-T7 units undergo pre-shipment inspection (PSI). If there is an issue with EL7520ILZ-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 EL7520ILZ-T7 part is unused and in its original packaging.
Return procedure for EL7520ILZ-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
EL7520ILZ-T7 Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
