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Renesas ISL97642IRTZ
- Part No.:
- ISL97642IRTZ
- Manufacturer:
- Renesas
- Category:
- Power Management - Specialized
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
ISL97642IRTZ.pdf
- Description:
- IC REG TFT-LCD DC/DC 32-TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,783
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Product details
Overview
ISL97642IRTZ from Intersil is a TFT-LCD DC/DC power management IC integrating a 18V/2.4A current-mode boost regulator, two LDO controllers (VON and VOFF), a VON-slice circuit with adjustable delay, and three rail-to-rail operational amplifiers for VCOM and VGAMMA biasing. It delivers 150mA peak output current per amplifier, 12MHz bandwidth, and 12V/µs slew rate in a single 32-lead 5mm×5mm thin QFN package.
For engineers reviewing the ISL97642IRTZ datasheet, ISL97642IRTZ pinout, ISL97642IRTZ application, or ISL97642IRTZ equivalent, this device serves as a highly integrated power solution for LCD panel bias generation-requiring precise sequencing, high-speed amplification, and dual-polarity regulated supplies in space-constrained notebook and monitor designs.
Technical Context
The ISL97642IRTZ implements a fixed-frequency (1.05–1.35 MHz) current-mode PWM boost controller with internal 18V N-channel MOSFET, enabling compact inductor and ceramic capacitor selection. Its voltage feedback loop uses transconductance compensation via the COMP pin, while fast current sensing eliminates need for external slope compensation.
Two independent LDO controllers drive external PNP (VON) and NPN (VOFF) pass transistors, supporting +15V to +36V and –5V to –25V outputs respectively, with built-in fault comparators (VFBP trip at 0.9V, VFBN trip at 430mV) and programmable start-up delays via CDEL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Boost Output Voltage | Adjustable up to 18V; set by external resistor divider on FB pin referencing 1.205V internal reference. |
| Boost Switch FET | Integrated 18V/2.4A N-channel MOSFET with 200mΩ typical RDS(on); eliminates external high-voltage switch. |
| Amplifier Bandwidth | 12MHz –3dB bandwidth per op-amp; supports stable VGAMMA settling in high-resolution TFT panels. |
| VON/VOFF Regulation | VON LDO controller regulates via DRVP with 1.2V reference (±2%); VOFF via DRVN with 0.203V reference (±15%). |
| Operating Temp Range | –40°C to +85°C ambient; validated for industrial-grade LCD monitor and notebook display subsystems. |
| Package | 32-lead 5mm × 5mm × 0.75mm Pb-free thin QFN; thermal pad enables >2.8W dissipation at 85°C ambient. |
| Input Supply Range | 2.6V to 5.5V VIN; supports direct connection to system 3.3V or 5V rails without pre-regulation. |
Pinout & Package
ISL97642IRTZ is housed in a 32-lead 5mm × 5mm thin QFN (TQFN) package with exposed thermal pad. Pin numbering follows top-view orientation with Pin 1 at top-left corner; NC pins are not internally connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SRC | Upper reference for COM switch | Provides high-side reference (up to 30V) for VON-slice output switching path. |
| REF | Internal reference bypass | Requires 0.1µF ceramic capacitor to AGND to stabilize 1.205V bandgap reference. |
| AGND / PGND / BGND | Analog / Power / Amplifier ground | Separate ground domains minimize noise coupling between boost switching and precision analog circuits. |
| OUT1–OUT3 | Op-amp outputs | Rail-to-rail outputs capable of ±75mA continuous drive; used for VCOM/VGAMMA buffering. |
| POS1–POS3 / NEG1–NEG3 | Op-amp inputs | Full rail-to-rail common-mode range (0V to VSUP); supports direct connection to DAC outputs or resistive dividers. |
| LX | Boost switch node | Connects to external inductor and Schottky rectifier; handles 1.6A RMS current and 24V max transient. |
| FB / FBP / FBN | Feedback inputs | FB sets boost output; FBP regulates VON via DRVP; FBN regulates VOFF via DRVN-each with dedicated fault comparators. |
| DEL | Delay timing capacitor | Accepts 22–100nF capacitor to program 10ms delays between VBOOST, VOFF, VON, and VON-slice activation. |
| CTL / COM / DRN | VON-slice control interface | CTL enables COM switching; COM connects to SRC (15Ω) or DRN (30Ω) based on CTL logic level for programmable gate drive. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Boost + Dual LDO Controllers | Reduces BOM count by eliminating separate boost IC, VON/VOFF regulators, and sequencing logic-enabling single-chip LCD bias solution. |
| Rail-to-Rail Op-Amps | Three 12MHz amplifiers with 12V/µs slew rate and ±75mA output drive enable accurate, low-distortion VGAMMA voltage distribution across full panel gamma curve. |
| Built-in Power Sequencing | Four-stage startup (VBOOST → VOFF → VON → VON-slice) controlled by single DEL capacitor ensures safe LCD panel power-up without external timers or microcontrollers. |
| MOSFET Current Limit & Thermal Shutdown | 2.8A peak LX current limit and 140°C thermal shutdown protect against overload and PCB-level thermal runaway during charge pump faults. |
| Pb-Free 32-Lead TQFN | 5mm × 5mm footprint with exposed thermal pad meets RoHS requirements and supports reflow-compatible assembly for high-volume LCD manufacturing. |
Applications
| LCD Notebook Display Power | TFT Monitor Bias Supply |
|---|---|
Use Scenario: Powering 13.3"–15.6" notebook LCD panels requiring +20V VON, –7V VOFF, and 8-channel VGAMMA with tight sequencing. IC Role / Device Role / Timing Role: ISL97642IRTZ generates all panel bias rails and buffers VGAMMA references using its three integrated op-amps and programmable delay chain. Use Value: Eliminates need for discrete boost + dual LDO + op-amp ICs, reducing PCB area by >40% and simplifying layout of high-speed analog traces near switching nodes. | Use Scenario: Driving 24"–27" desktop TFT monitors with 10-bit gamma correction and ESD-sensitive VCOM lines. IC Role / Device Role / Timing Role: ISL97642IRTZ acts as central bias generator-its rail-to-rail op-amps buffer DAC outputs to VGAMMA resistive ladders while maintaining <10mV offset drift over temperature. Use Value: 12MHz bandwidth and 12V/µs slew rate ensure <1µs settling for 10-bit steps, preventing gamma banding artifacts in static UI elements. |
| LCD-TV Panel Interface | Industrial HMI Display Module |
Use Scenario: Supporting 32"–55" LCD-TVs with dynamic backlight dimming and fast frame-rate updates. IC Role / Device Role / Timing Role: ISL97642IRTZ supplies VON/VOFF for row/column drivers and conditions VCOM with low-noise amplification synchronized to video timing signals. Use Value: Internal soft-start and fault latching prevent panel flash or latch-up during power cycling-critical for consumer TV reliability certification. | Use Scenario: Enabling ruggedized 7"–12" HMI displays in factory automation panels operating continuously at 70°C ambient. IC Role / Device Role / Timing Role: ISL97642IRTZ delivers thermally robust bias generation with guaranteed –40°C to +85°C operation and thermal shutdown at 140°C junction. Use Value: Integrated thermal protection and wide-input 2.6–5.5V range allow direct connection to industrial 3.3V/5V backplanes without derating or heatsinking. |
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 |
|---|---|---|---|
| TPS65105RGER | Single 12V boost + dual LDO only; no integrated op-amps; requires external VCOM/VGAMMA buffers. | Supports smaller panels (<10") with simpler gamma; lacks rail-to-rail amplification for high-resolution VGAMMA. | Select when op-amp integration is unnecessary and cost sensitivity outweighs board space savings. |
| MAX1664ETJ+ | Higher boost voltage (28V), but only one LDO controller and no VON-slice; 24-pin TQFN, no DEL pin for sequencing. | Targeted at legacy VGA/XGA panels; cannot replicate ISL97642IRTZ's four-stage programmable startup or VON-slice gate drive. | Choose only for drop-in replacement in existing MAX1664-based designs where sequencing flexibility is not required. |
Compared with TPS65105RGER and MAX1664ETJ+, the ISL97642IRTZ uniquely integrates three rail-to-rail op-amps and a VON-slice circuit in a single 32-pin QFN-enabling complete TFT bias generation without external amplification or discrete timing components, which reduces design risk and validation time for HD+ display modules.
Availability
ISL97642IRTZ is available at Aetrix Electronics and suitable for LCD notebook displays, TFT monitor power systems, and industrial HMI display modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL97642IRTZ 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 Corporation (now part of Renesas Electronics) is a U.S.-based analog and power management IC designer known for high-performance power solutions targeting display, industrial, and computing markets.
The ISL97642IRTZ belongs to Intersil's TFT-LCD power management product line, engineered specifically to consolidate boost conversion, dual-polarity LDO control, and high-fidelity analog buffering into one IC for next-generation flat-panel display bias architectures.
FAQ
What is the maximum output voltage supported by the ISL97642IRTZ boost regulator?
The ISL97642IRTZ boost regulator supports an output voltage range up to 18V, determined by the external resistor divider on the FB pin and referenced to its internal 1.205V feedback voltage. Operation beyond 18V is not specified and may violate absolute maximum ratings on the LX pin (–0.3V to +24V).
Can the ISL97642IRTZ drive VCOM directly without external components?
Yes-the ISL97642IRTZ includes three rail-to-rail operational amplifiers with 150mA peak output current and 12V/µs slew rate, enabling direct VCOM buffering. Each op-amp (OUT1–OUT3) accepts inputs from 0V to VSUP and drives outputs across the full rail range, eliminating need for external op-amps in most TFT-LCD designs.
How does the ISL97642IRTZ implement power sequencing for VON and VOFF?
The ISL97642IRTZ uses a single external capacitor on the DEL pin to program four sequential delays: VBOOST powers first, then VOFF after 10ms, VON after another 10ms, and finally the VON-slice circuit activates 10ms later. This ensures safe LCD panel startup by preventing reverse-bias stress on driver ICs during ramp-up.
What is the purpose of the SRC and DRN pins on the ISL97642IRTZ?
SRC and DRN serve as upper and lower reference voltages for the VON-slice switch function. When CTL is high, COM connects to SRC through a 15Ω internal resistor; when CTL is low, COM connects to DRN through a 30Ω resistor-enabling programmable gate drive for external row/column driver transistors in TFT panels.
Does the ISL97642IRTZ support both continuous and discontinuous conduction modes in boost operation?
Yes-the ISL97642IRTZ operates primarily in continuous conduction mode (CCM) but supports discontinuous conduction mode (DCM) at light loads. Its current-mode architecture maintains stability across both modes; however, DCM may impact VON/VOFF regulation if LX switching edges become irregular, so inductor selection should prioritize CCM under minimum expected load.
ISL97642IRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- LCD TV/Monitor
- Current - Supply:
- 5mA
- Voltage - Supply:
- 2.6V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TQFN (5x5)
ISL97642IRTZ FAQ
1.How can I place an order for ISL97642IRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL97642IRTZ 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 ISL97642IRTZ reliable?
The price and inventory of ISL97642IRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL97642IRTZ is usually 5 days.
3.What payment methods are accepted for ISL97642IRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL97642IRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL97642IRTZ?
ISL97642IRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL97642IRTZ 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 ISL97642IRTZ?
For technical support, including ISL97642IRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL97642IRTZ requirements.
6.How does Aetrix verify that ISL97642IRTZ is sourced from the original manufacturer or authorized distributors?
All ISL97642IRTZ 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 ISL97642IRTZ meets industry standards.
7.What is the process for return or replacement of ISL97642IRTZ?
All ISL97642IRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL97642IRTZ, 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 ISL97642IRTZ part is unused and in its original packaging.
Return procedure for ISL97642IRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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