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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Renesas EL7640AILTZ

Name: EL7640AILTZ
Brand: Renesas
SKU: EL7640AILTZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: EL7640AILTZ

Manufacturer:: Renesas

Category:: Special Purpose Regulators

Package:: 32-WFQFN Exposed Pad

Datasheet:: EL7640AILTZ.pdf

Description:: IC REG CONV TFT LCD 3OUT 32TQFN

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Product details

Overview

EL7640AILTZ from Intersil is a TFT-LCD DC/DC power management IC integrating a 1.2MHz current-mode boost regulator (18V/3A FET), two LDO controllers for VON/VOFF, a VON-slice circuit with adjustable delay, and one rail-to-rail operational amplifier for VCOM/VGAMMA biasing. It delivers 150mA peak output drive, 12MHz bandwidth, and 12V/µs slew rate in a single 32-pin QFN package, targeting LCD panel power sequencing in notebook displays.

For engineers reviewing the EL7640AILTZ datasheet, EL7640AILTZ pinout, EL7640AILTZ application, or EL7640AILTZ equivalent, key selection criteria include its integrated single-op-amp configuration (vs. EL7641A/EL7642A's 3/5 amplifiers), 1% boost output accuracy, -40°C to +85°C operation, and compatibility with external PNP/NPN pass transistors for programmable VON/VOFF generation.

Technical Context

The EL7640AILTZ implements a fixed-frequency (1050–1350 kHz) current-mode PWM boost controller with internal 18V N-channel MOSFET, supporting both P-mode (fast transient response) and PI-mode (tight regulation) via COMP pin configuration. Its dual LDO controllers regulate VON (positive) and VOFF (negative) supplies using external transistors, with dedicated feedback pins (FBP/FBN), drive outputs (DRVP/DRVN), and fault comparators (trip thresholds at 0.9V and 430mV).

It integrates one high-speed rail-to-rail op amp (OUT1/POS1/NEG1) with 12MHz –3dB bandwidth, ±75mA continuous output current, and 12V/µs slew rate - optimized for VCOM buffering and gamma reference distribution. Power sequencing is controlled by DEL capacitor timing (10ms delays between VBOOST→VOFF→VON→VON-slice enable), and thermal shutdown activates at 140°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Boost Output Voltage	Adjustable up to 18V; set by external resistor divider on FB pin; 1% accuracy ensures stable VBOOST for downstream charge pumps.
Switching Frequency	1.2 MHz nominal (1050–1350 kHz); enables compact 6.8µH inductors and low-profile ceramic capacitors in space-constrained LCD panels.
Integrated FET	18V/3A N-channel MOSFET on LX pin; eliminates external high-voltage switch, reducing BOM count and layout complexity.
Op Amp Performance	12 MHz bandwidth, 12 V/µs slew rate, ±75 mA continuous output; supports fast settling of VCOM voltage during frame transitions.
VON/VOFF Control	LDO controllers drive external PNP (VON) and NPN (VOFF) pass transistors; FBP/FBN feedback references (1.2V / 0.2V) enable precise programmable outputs from +15V to +36V and -5V to -25V.
Operating Temperature	-40°C to +85°C ambient; validated across full range for industrial-grade notebook and monitor applications.
Package	32-lead 5mm × 5mm thin QFN (MDP0051); exposed thermal pad enables >2.8W dissipation on JEDEC-compliant PCBs.

Pinout & Package

EL7640AILTZ uses a 32-lead 5mm × 5mm thin QFN package (MDP0051) with exposed thermal pad. Pin functions are identical across EL7640A/EL7641A/EL7642A families per datasheet Figure 1 (top view), with EL7640A omitting pins assigned to additional op amps (OUT2–OUT5, POS2–POS5, NEG2–NEG5).

Pin/Terminal	Circuit Role	Design Meaning
SRC	Upper reference for COM switch	Provides 30V-rated high-side reference for VON-slice output switching; connects to COM when CTL = 1 via 15Ω R_ON.
REF	Internal reference bypass	Stabilizes 1.215V bandgap reference; requires 0.1µF ceramic capacitor to AGND for noise immunity.
AGND	Analog ground	Reference for boost control, op amps, and feedback circuits; must be separated from PGND to avoid noise coupling.
PGND	Power ground	Return path for LX switch current; ties to AGND only at single point near IC to minimize ground bounce.
OUT1	Op amp 1 output	Rail-to-rail output capable of ±75mA; drives VCOM or VGAMMA reference nodes directly without external buffers.
NEG1 / POS1	Op amp 1 inputs	Fully rail-to-rail differential inputs; support direct connection to resistive gamma-divider networks.
BGND	Op amp ground	Separate ground return for all op amps; decoupled with 0.1µF capacitor to SUP to suppress supply noise.
SUP	Op amp positive supply	Accepts 4.5–18V input; powers all op amps and must be bypassed to BGND with 0.1µF capacitor.
LX	Boost switch node	Drives external inductor; integrates 160mΩ R_ON N-FET; rated for 24V max and 1.6A RMS current.
IN	Main input supply	2.6–5.5V input; powers internal circuitry and boost controller; requires 1µF ceramic bypass to AGND.
FB	Boost feedback	Monitors divided VBOOST; 1.205V typical reference enables accurate output setting with <60kΩ divider.
COMP	Error amplifier compensation	Selects P-mode (direct to VIN) or PI-mode (RC network to GND) to trade transient response vs. load regulation.
FBP	VON LDO feedback	1.2V reference input for positive LDO; fault trips at 0.9V falling edge, enabling overvoltage protection.
DRVP	VON LDO driver	Sinks up to 4mA to drive external PNP base; R_ON = 5–10Ω ensures fast turn-on of pass transistor.
FBN	VOFF LDO feedback	0.203V reference input for negative LDO; fault trips at 430mV rising edge, protecting against VOFF overvoltage.
DRVN	VOFF LDO driver	Sources up to 4mA to drive external NPN emitter; R_ON = 30–60Ω balances drive strength and quiescent current.
DEL	Sequencing delay capacitor	Connects to 22–100nF capacitor to set 10ms delays between VBOOST, VOFF, VON, and VON-slice activation.
CTL	VON-slice control input	TTL-compatible input (0.4V_LO/0.6V_HI) enabling/disabling COM output; 1µA leakage ensures low-power standby.
DRN	Lower reference for COM switch	Provides low-side reference for VON-slice; connects to COM when CTL = 0 via 30Ω R_ON.
COM	VON-slice output	Switched output routed to SRC (CTL=1) or DRN (CTL=0); 15Ω/30Ω R_ON supports logic-level or analog switching.

Key Features

Feature	Design Value
Current-mode boost regulator	1.2MHz fixed-frequency operation with internal 18V/3A FET reduces external component count and improves light-load efficiency.
Rail-to-rail op amp	Single amplifier with 12V/µs slew rate and 12MHz bandwidth enables precise, low-distortion VCOM biasing without external gain stages.
VON/VOFF LDO controllers	Independent feedback (FBP/FBN) and drive (DRVP/DRVN) pins allow programmable +15–36V and -5–25V outputs using low-cost SOT-23 transistors.
Built-in power sequencing	Four-stage startup (VBOOST → VOFF → VON → VON-slice) controlled by single DEL capacitor eliminates need for external timers or µC coordination.
Multilevel protection	Includes undervoltage lockout (2.5V), thermal shutdown (140°C), boost current limit (3A), and LDO fault detection with 23ms delay.

Applications

Large-Screen Notebook LCD Panels	Industrial LCD Monitors
Use Scenario: Powering 15.6"–17.3" TFT-LCD panels requiring +20V VON, -8V VOFF, and rail-to-rail VCOM biasing. IC Role / Device Role / Timing Role: EL7640AILTZ serves as primary power management IC, generating all panel bias rails and sequencing startup within 40ms. Use Value: Single-chip integration replaces discrete boost + dual LDO + op amp solutions, reducing board area by >35% and eliminating inter-stage timing mismatches.	Use Scenario: Driving 10.1"–12.1" sunlight-readable industrial monitors operating in -30°C to +70°C environments. IC Role / Device Role / Timing Role: EL7640AILTZ regulates VON/VOFF under wide input (2.6–5.5V) and temperature (-40°C to +85°C), while its op amp maintains VCOM stability during rapid brightness changes. Use Value: 1% boost accuracy and 2% LDO regulation ensure consistent gamma curve fidelity across temperature, preventing grayscale inversion.
Embedded Display Modules	Medical Diagnostic Displays
Use Scenario: Compact display subsystems in portable ultrasound or handheld test equipment with strict EMI and size constraints. IC Role / Device Role / Timing Role: EL7640AILTZ's 1.2MHz boost minimizes inductor size and radiated emissions; its single op amp buffers gamma reference for 8-bit DAC output. Use Value: 5×5mm QFN footprint and integrated sequencing eliminate need for external supervisors, enabling sub-25mm² power section layouts.	Use Scenario: High-reliability diagnostic displays in MRI or X-ray systems requiring fail-safe power sequencing and fault reporting. IC Role / Device Role / Timing Role: EL7640AILTZ initiates VBOOST first, then asserts VOFF after 10ms, VON after another 10ms, and enables VON-slice only after full stabilization - preventing panel latch-up. Use Value: Dedicated fault comparators on FBP/FBN provide independent VON/VOFF monitoring, allowing system µC to detect and log overvoltage events before damage occurs.

Large-Screen Notebook LCD Panels

Industrial LCD Monitors

Use Scenario: Powering 15.6"–17.3" TFT-LCD panels requiring +20V VON, -8V VOFF, and rail-to-rail VCOM biasing.

IC Role / Device Role / Timing Role: EL7640AILTZ serves as primary power management IC, generating all panel bias rails and sequencing startup within 40ms.

Use Value: Single-chip integration replaces discrete boost + dual LDO + op amp solutions, reducing board area by >35% and eliminating inter-stage timing mismatches.

Use Scenario: Driving 10.1"–12.1" sunlight-readable industrial monitors operating in -30°C to +70°C environments.

IC Role / Device Role / Timing Role: EL7640AILTZ regulates VON/VOFF under wide input (2.6–5.5V) and temperature (-40°C to +85°C), while its op amp maintains VCOM stability during rapid brightness changes.

Use Value: 1% boost accuracy and 2% LDO regulation ensure consistent gamma curve fidelity across temperature, preventing grayscale inversion.

Embedded Display Modules

Medical Diagnostic Displays

Use Scenario: Compact display subsystems in portable ultrasound or handheld test equipment with strict EMI and size constraints.

IC Role / Device Role / Timing Role: EL7640AILTZ's 1.2MHz boost minimizes inductor size and radiated emissions; its single op amp buffers gamma reference for 8-bit DAC output.

Use Value: 5×5mm QFN footprint and integrated sequencing eliminate need for external supervisors, enabling sub-25mm² power section layouts.

Use Scenario: High-reliability diagnostic displays in MRI or X-ray systems requiring fail-safe power sequencing and fault reporting.

IC Role / Device Role / Timing Role: EL7640AILTZ initiates VBOOST first, then asserts VOFF after 10ms, VON after another 10ms, and enables VON-slice only after full stabilization - preventing panel latch-up.

Use Value: Dedicated fault comparators on FBP/FBN provide independent VON/VOFF monitoring, allowing system µC to detect and log overvoltage events before damage occurs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar TFT-LCD power management applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
EL7641AILTZ	Includes three operational amplifiers (OUT1/OUT2/OUT3) instead of one; identical boost, LDO, and sequencing architecture.	Required when driving multi-segment VCOM or parallel gamma reference chains needing ≥2 independent buffered outputs.	Select EL7641AILTZ only if additional op amp channels are needed; pinout and PCB layout are identical, but firmware may require revalidation of op amp routing.
TPS65105RGER	TI device with integrated 2.5A boost, dual LDOs, and single op amp; operates at 1.1MHz, supports 2.7–5.5V input, but lacks VON-slice circuit and uses different feedback references (1.25V/0.6V).	Valid for cost-sensitive consumer notebooks where VON-slice functionality is unused and 1.25V boost reference suffices.	Choose TPS65105RGER for new designs prioritizing TI ecosystem support and lower unit cost; note that DEL-based sequencing and SRC/DRN/COM switching must be implemented externally.

Compared with EL7641AILTZ, EL7640AILTZ saves cost and board space by omitting two op amps while retaining identical power stage performance and sequencing; versus TPS65105RGER, it offers tighter boost accuracy (1% vs. 2%), integrated VON-slice switching, and higher op amp slew rate (12V/µs vs. 8V/µs), making it preferable for high-fidelity gamma control.

Availability

EL7640AILTZ is available at Aetrix Electronics and suitable for TFT-LCD panels, notebook displays, and industrial monitors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for EL7640AILTZ 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 EL7640A family was designed specifically for TFT-LCD panel power systems, integrating boost conversion, programmable dual-polarity LDO control, and analog signal conditioning into a single QFN package to reduce bill-of-materials and simplify display subsystem design.

FAQ

What is the maximum output voltage supported by the EL7640AILTZ boost regulator?

The EL7640AILTZ boost regulator supports an output voltage range up to 18V, as specified in the Electrical Specifications table (VBOOST MAX = 18V). This is achieved using an internal 18V-rated N-channel MOSFET on the LX pin. The actual output is set by an external resistor divider on the FB pin, referenced to a 1.205V internal bandgap. Operation beyond 18V risks exceeding absolute maximum ratings and is not guaranteed.

Does the EL7640AILTZ include built-in protection features?

Yes, the EL7640AILTZ incorporates multiple protection mechanisms: undervoltage lockout (UVLO) triggers at 2.5V (rising) and 2.3V (falling); thermal shutdown activates at 140°C; boost current limit is set to 3A peak; and dedicated fault comparators monitor FBP (trip at 0.9V) and FBN (trip at 430mV) to protect VON and VOFF outputs. These features are fully integrated and require no external components.

Can the EL7640AILTZ drive external PNP and NPN transistors for VON and VOFF generation?

Yes, the EL7640AILTZ is explicitly designed to drive external PNP transistors for VON (via DRVP and FBP) and NPN transistors for VOFF (via DRVN and FBN). The datasheet provides detailed design equations and example circuits using Fairchild MMBT3906 (PNP) and MMBT3904 (NPN) transistors, including base-emitter resistor calculations (e.g., 700Ω RBP) to ensure stable regulation under 50mA load conditions.

How does the EL7640AILTZ handle power sequencing for TFT-LCD panels?

The EL7640AILTZ implements four-stage power sequencing using a single external DEL capacitor (22–100nF): VBOOST rises first, followed by VOFF after 10ms, then VON after another 10ms, and finally VON-slice activation after a third 10ms delay. This deterministic, capacitor-controlled sequence prevents panel damage from improper bias rail ramp-up order and eliminates the need for external microcontrollers or timers.

Is the op amp in the EL7640AILTZ rail-to-rail on both input and output?

Yes, the single operational amplifier in the EL7640AILTZ (pins OUT1, POS1, NEG1) features rail-to-rail input and output capability across its full supply range (4.5V to 18V on SUP). This allows direct interfacing with resistive gamma-divider networks and VCOM nodes without level-shifting, and supports full-scale output swing from near AGND to within 15mV of SUP under 100µA load.

EL7640AILTZ Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 32-WFQFN Exposed Pad

Packaging:: Bulk

Product Status:: Obsolete

Applications:: Converter, TFT LCD

Voltage - Input:: 2.6V ~ 5.5V

Number of Outputs:: 3

Voltage - Output:: 5.5V ~ 20V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-TQFN-EP (5x5)

EL7640AILTZ FAQ

1.How can I place an order for EL7640AILTZ through Aetrix?

Please submit a Request for Quotation (RFQ) for EL7640AILTZ 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 EL7640AILTZ reliable?

The price and inventory of EL7640AILTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7640AILTZ is usually 5 days.

3.What payment methods are accepted for EL7640AILTZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7640AILTZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for EL7640AILTZ?

EL7640AILTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your EL7640AILTZ 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 EL7640AILTZ?

For technical support, including EL7640AILTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7640AILTZ requirements.

6.How does Aetrix verify that EL7640AILTZ is sourced from the original manufacturer or authorized distributors?

All EL7640AILTZ 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 EL7640AILTZ meets industry standards.

7.What is the process for return or replacement of EL7640AILTZ?

All EL7640AILTZ units undergo pre-shipment inspection (PSI). If there is an issue with EL7640AILTZ, 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 EL7640AILTZ part is unused and in its original packaging.

Return procedure for EL7640AILTZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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