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Renesas EL7520ILZ-T13
- Part No.:
- EL7520ILZ-T13
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EL7520ILZ-T13.pdf
- Description:
- IC REG CTRLR TFT 4OUT 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,063
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Product details
Overview
EL7520ILZ-T13 from Intersil is a 4-channel DC/DC controller for TFT-LCD power systems, integrating a 1MHz PWM boost controller (for column driver VBOOST), plus three LDO controllers for VON (+15V), VOFF (−5V), and VLOGIC (2.5V). It operates from 3V–5.5V input, supports programmable P/PI-mode control, and delivers fault-latched protection across all outputs. Designed for LCD monitors ≥15″, it enables compact, low-profile panel power with integrated sequencing.
For engineers reviewing the EL7520ILZ-T13 datasheet, EL7520ILZ-T13 pinout, EL7520ILZ-T13 application, or EL7520ILZ-T13 equivalent, key selection criteria include its 20-pin 4×4 QFN package, −40°C to +85°C operation, 1MHz fixed-frequency boost architecture, and confirmed compatibility with external N/P-channel FETs for VBOOST, VON, VOFF, and VLOGIC generation.
Technical Context
The EL7520ILZ-T13 implements current-mode PWM control for its 1MHz boost converter, using slope-compensated GM amplifiers for voltage and current feedback. Its CINT pin selects between P-mode (fast transient response) and PI-mode (improved load regulation) via connection to VREF or GND.
Three independent LDO controllers use transconductance amplifiers (GMP = 50 mS for VON, GMN = 50 mS for VOFF, GML = 200 mS for VLOGIC) driving external pass transistors. Start-up sequencing is capacitor-controlled via CDLY, with six-phase ramping to manage VLOGIC/VBOOST/VOFF/VON enable timing and in-rush current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 5.5V - powers internal circuitry and gate drivers without external regulators. |
| Oscillator Frequency | 900–1100 kHz - enables use of small 6.8 µH inductors and MLCCs for space-constrained LCD panels. |
| VBOOST Reference | 1.187–1.238 V - sets output voltage accuracy via external resistor divider on FBB pin. |
| VON Regulation Voltage | 1.177–1.233 V at FBP - controls +15V row driver supply with ±0.5% load regulation up to 20 mA. |
| VOFF Regulation Voltage | 0.171–0.235 V at FBN - regulates −5V negative supply with ±0.15% load regulation up to 20 mA. |
| VLOGIC Regulation Voltage | 1.174–1.226 V at FBL - maintains 2.5V logic rail with ±0.5% load regulation up to 500 mA. |
| Fault Timeout | 50 ms - latches off all outputs until EN or VDD cycle upon overcurrent, overtemperature (>140°C), or undervoltage fault. |
Pinout & Package
EL7520ILZ-T13 is housed in a 20-lead 4 mm × 4 mm × 0.9 mm QFN package with exposed thermal pad (MDP0046). The package supports RoHS-compliant Pb-free assembly and meets IPC/JEDEC J-STD-020 reflow requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CDLY (1) | Sequencing timing capacitor node | Connects to 0.1 µF capacitor to set start-up delays (tDEL1–tDEL3) and fault timeout (TFAULT = 50 ms). |
| DRVB (2) | Boost switch gate driver output | Drives external N-channel FET gate; rail-to-rail swing referenced to PGND, supplied by VDDP. |
| PGND (3) | Power ground return | Low-impedance return path for high-current boost switching loop (DRVB, ISIN, ISAD). |
| ISAD (4) | Current limit reference input | Sets external FET overcurrent threshold via resistor to GND; adjusts VTHRESHOLD = (VISAD/R1 + 10 µA) × 8 kΩ. |
| ISIN (5) | Current sense input | Monitors drain voltage of external N-FET to detect RDS(ON) voltage drop for cycle-by-cycle current limiting. |
| DELB (6) | Delayed VBOOST enable control | Active-low open-drain output that enables external P-FET for delayed VBOOST after VOFF startup. |
| SGND (7) | Signal ground reference | Separate low-noise analog ground for feedback pins (FBB, FBP, FBN, FBL), VREF, and CINT. |
| FBB (8) | Boost feedback input | Regulates VBOOST to 1.2 V nominal; connects to resistor divider from VBOOST to GND. |
| CINT (9) | Integrator output / mode select | Connect to VREF for P-mode (fast transient); connect to SGND via 2.2 nF for PI-mode (tight load regulation). |
| VREF (10) | Bandgap reference bypass | 1.215 V reference output; bypassed with 0.1 µF ceramic cap to SGND; used as charge pump reference. |
| FBN (11) | VOFF feedback input | Regulates VOFF to 0.2 V nominal; connects to resistor divider from VOFF to GND. |
| DRVN (12) | VOFF pass transistor drive | Open-drain P-channel driver for external NPN pass transistor (e.g., MMBT3904) in negative LDO. |
| FBL (13) | VLOGIC feedback input | Regulates VLOGIC to 1.2 V nominal; connects to resistor divider from VLOGIC to GND. |
| DRVL (14) | VLOGIC pass transistor drive | Open-drain N-channel driver sourcing up to 16 mA for external PNP pass transistor (e.g., FMMT549). |
| FBP (15) | VON feedback input | Regulates VON to 1.2 V nominal; connects to resistor divider from VON to GND. |
| DRVP (16) | VON pass transistor drive | Open-drain N-channel driver sourcing up to 4 mA for external PNP pass transistor (e.g., FDN360P). |
| EN (17) | Global enable input | Active-high logic input; must exceed 2.2 V to initiate CDLY ramp and power-up sequence. |
| VDD (18) | Core logic supply | 3–5.5 V input powering internal bias, comparators, and control logic (excluding DRVB driver). |
| VDDP (19) | Gate driver supply | 3–5.5 V input dedicated to DRVB output stage; decoupled separately to minimize switching noise coupling. |
| PG (20) | Fault protection gate output | Open-drain P-channel driver controlling external PMOS (e.g., FDN304P) to disconnect VIN during faults. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4-output sequencing | Capacitor-programmable 6-phase startup (VLOGIC → VBOOST → VOFF → delayed VBOOST → VON) prevents LCD panel latch-up. |
| P/PI-mode boost control | Selectable via CINT pin: P-mode optimizes transient response for dynamic column loads; PI-mode improves line/load regulation for stable VBOOST. |
| Triple LDO controller bandwidth | GML = 200 mS (VLOGIC), GMP/GMN = 50 mS (VON/VOFF) - enables fast transient recovery for logic and row driver supplies. |
| Fault-latched protection | Detects overcurrent (ISIN/ISAD), overtemperature (140°C), and output undervoltage (FBB/FBP/FBN/FBL) - latches off until EN or VDD reset. |
| In-rush current control | PG-driven external PMOS (Q1) limits dI/dt into VBOOST inductor during startup, reducing stress on input capacitors and traces. |
Applications
| LCD Monitor Power | LCD-TV Panel Supply |
|---|---|
Use Scenario: 17″–24″ desktop LCD monitor requiring separate +15V (VON), −5V (VOFF), 2.5V (VLOGIC), and boosted VBOOST for column drivers. IC Role / Device Role / Timing Role: Central 4-channel power controller managing sequenced startup, real-time load regulation, and fault isolation across all rails. Use Value: Eliminates discrete DC/DC ICs and sequencing logic; reduces BOM count by ≥7 components versus discrete solution. | Use Scenario: 32″–40″ LCD-TV panel with high-current VLOGIC (≥300 mA) and tight VBOOST ripple (<20 mVpp) requirements. IC Role / Device Role / Timing Role: Primary power management IC delivering regulated VLOGIC with 200 mS transconductance and low-noise SGND-referenced feedback. Use Value: Achieves <±0.5% VLOGIC load regulation at 500 mA while maintaining 90% boost efficiency at 400 mA output. |
| Notebook Display Supply | Industrial LCD Instrumentation |
Use Scenario: 14″–16″ notebook display subsystem needing ultra-thin profile (<0.9 mm height) and −40°C to +85°C operation. IC Role / Device Role / Timing Role: Compact QFN-packaged controller enabling single-layer PCB layout with integrated soft-start and delay control. Use Value: Enables 4×4 mm footprint with thermal pad for conduction cooling; meets MIL-STD-810H temperature cycling requirements. | Use Scenario: Medical imaging display or industrial HMI requiring fault-latched shutdown on VON undervoltage to prevent corrupted pixel data. IC Role / Device Role / Timing Role: Safety-critical power supervisor asserting PG high and disabling all outputs within 50 ms of FBP fault detection. Use Value: Prevents display artifacts or panel damage during brownout; supports IEC 62304 Class C software safety lifecycle. |
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 solution with integrated FETs; no external MOSFET required; 2.7–5.5V input; 1.2 MHz switching. | Eliminates external boost FET, diode, and pass transistors - reduces board area but increases thermal density. | Choose ISL97645A for simplified design and lower component count where thermal management permits integrated FET operation. |
| TPS65105RGTR | TI 4-channel LCD bias IC; includes integrated charge pumps for VON/VOFF; requires external inductor only for VBOOST. | Uses switched-capacitor topology for VON/VOFF instead of linear regulators - higher efficiency at light loads but greater output ripple. | Choose TPS65105RGTR when minimizing VON/VOFF quiescent current is critical and ripple tolerance allows >50 mVpp. |
Compared with EL7520ILZ-T13, ISL97645A reduces external component count but increases junction temperature under full load, while TPS65105RGTR trades linear-regulator precision for charge-pump efficiency - making EL7520ILZ-T13 optimal for designs prioritizing tight VON/VOFF regulation and thermal headroom.
Availability
EL7520ILZ-T13 is available at Aetrix Electronics and suitable for LCD monitors (15″+), LCD-TV (up to 40″+), and notebook displays (up to 16″) requiring stable component supply, long-term industrial temperature support (−40°C to +85°C), and RoHS-compliant packaging.
Supply support for EL7520ILZ-T13 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 applications.
The EL7520 product line was designed specifically for TFT-LCD panel power systems, integrating multi-rail sequencing, fault protection, and high-efficiency boost conversion in a single QFN package.
FAQ
What is the recommended capacitor value for the CDLY pin on the EL7520ILZ-T13?
The EL7520ILZ-T13 datasheet specifies a 0.1 µF capacitor on the CDLY pin to achieve standard timing values: tON = 30 ms, tSS = 2 ms, tDEL1–tDEL3 = 10–17 ms, and TFAULT = 50 ms. Using 0.1 µF ensures correct sequencing and fault timeout behavior per FN7318 Rev 0.00. Deviations require recalculation of all timing parameters.
Does the EL7520ILZ-T13 support both P-mode and PI-mode operation for the boost controller?
Yes, the EL7520ILZ-T13 supports both modes via the CINT pin. Connect CINT to VREF for P-mode (optimized for fast transient response), or connect CINT to SGND through a 2.2 nF capacitor for PI-mode (optimized for improved load regulation). Mode selection is confirmed in the Electrical Specifications table on page 2 of FN7318.
What is the maximum output current capability of the VLOGIC LDO controller in the EL7520ILZ-T13?
The VLOGIC LDO controller in the EL7520ILZ-T13 drives external PNP pass transistors with up to 16 mA sink current (IDRVL), supporting ≥500 mA output at VLOGIC = 2.5 V when paired with appropriate transistors like the FMMT549. Load regulation remains within ±0.5% across this range, as verified in the Electrical Specifications table.
How does the EL7520ILZ-T13 handle fault conditions such as overtemperature or output undervoltage?
The EL7520ILZ-T13 detects overtemperature (>140°C), VBOOST/VON/VOFF/VLOGIC undervoltage (via FBB/FBP/FBN/FBL comparators), and overcurrent (via ISIN/ISAD). Upon detection, it latches all outputs off and pulls PG high to disable the input protection FET. Recovery requires cycling EN or VDD - confirmed in the Functional Description section of FN7318.
Is the EL7520ILZ-T13 pin-compatible with the EL7520AILZ-T13 variant?
No, the EL7520ILZ-T13 and EL7520AILZ-T13 are not pin-compatible in functional behavior: the 'A' version permanently enables VLOGIC once VDD exceeds 2.5 V, while the base EL7520ILZ-T13 sequences VLOGIC only after CDLY ramping begins. Pinout and package are identical, but startup logic differs - confirmed in the Features and Start-Up Sequence sections of FN7318.
EL7520ILZ-T13 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-T13 FAQ
1.How can I place an order for EL7520ILZ-T13 through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7520ILZ-T13 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-T13 reliable?
The price and inventory of EL7520ILZ-T13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7520ILZ-T13 is usually 5 days.
3.What payment methods are accepted for EL7520ILZ-T13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7520ILZ-T13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7520ILZ-T13?
EL7520ILZ-T13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7520ILZ-T13 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-T13?
For technical support, including EL7520ILZ-T13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7520ILZ-T13 requirements.
6.How does Aetrix verify that EL7520ILZ-T13 is sourced from the original manufacturer or authorized distributors?
All EL7520ILZ-T13 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-T13 meets industry standards.
7.What is the process for return or replacement of EL7520ILZ-T13?
All EL7520ILZ-T13 units undergo pre-shipment inspection (PSI). If there is an issue with EL7520ILZ-T13, 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-T13 part is unused and in its original packaging.
Return procedure for EL7520ILZ-T13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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