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Renesas ISL98608II55Z-T
- Part No.:
- ISL98608II55Z-T
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
ISL98608II55Z-T.pdf
- Description:
- IC REG CONV TFT LCD 2OUT 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,432
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Product details
Overview
ISL98608II55Z-T from Renesas (formerly Intersil) is a highly integrated dual-rail power supply IC for small TFT-LCD displays, generating ±5.5V outputs (adjustable from ±4.5V to ±7V in 50mV steps) from a 2.5V–5V input. It integrates a synchronous boost regulator, LDO, and inverting charge pump with I²C programmability, achieving >89% efficiency at 12mA load and occupying only 18mm² PCB area.
For engineers reviewing the ISL98608II55Z-T datasheet, ISL98608II55Z-T pinout, ISL98608II55Z-T application, or ISL98608II55Z-T equivalent, key selection criteria include its WLCSP-16 package size, programmable sequencing control, integrated discharge resistors, ±5.5V default rail generation, and suitability for Li-ion battery-powered handheld display systems requiring compact, high-efficiency dual-polarity supplies.
Technical Context
The ISL98608II55Z-T implements a three-stage architecture: a synchronous boost converter (VBST) powers both an LDO (VP) and an inverting charge pump (VN), enabling independent regulation of positive and negative rails. Its I²C interface controls output voltages, soft-start timing, and enable sequencing-critical for minimizing display panel stress during power-up/down.
Internal compensation, integrated MOSFETs, and dedicated discharge paths eliminate external components for feedback, gate drive, and rail discharge. The device operates across –40°C to +85°C and features thermal shutdown (150°C), undervoltage lockout (2.32V), and rail-specific undervoltage protection (60% of VP/VN).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5V - supports single-cell Li-ion (2.8V–4.2V) and regulated 3.3V/5V rails without external pre-regulation. |
| Output Voltages (Default) | +5.5V (VP) and –5.5V (VN) - factory-configured dual-rail bias for TFT source/gate drivers. |
| Output Adjustability | ±4.5V to ±7V in 50mV steps via I²C - enables fine-tuning for varying panel VCOM and gate-on voltage requirements. |
| Peak Efficiency | >89% at 12mA load between VP and VN - minimizes heat and extends battery life in space-constrained smartphones/tablets. |
| Package | 1.744mm × 1.744mm, 4×4 WLCSP (0.4mm pitch) - ultra-compact footprint ideal for narrow-bezel display modules. |
| Shutdown Current | 1µA - preserves battery charge during display sleep or system standby modes. |
| Operating Temperature | –40°C to +85°C ambient - qualified for consumer handheld and industrial portable display environments. |
Pinout & Package
ISL98608II55Z-T uses a 16-ball, 4×4 array Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch and 1.744mm × 1.744mm body size. Ball layout follows standard top-view orientation with A1–D4 grid labeling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 PGND | Power ground for boost converter | Separate low-impedance return path for high-current boost switching node (LXP) to minimize noise coupling into analog sections. |
| B2 ENN | Enable input for VBST and VN regulators | Active-high logic input (1MΩ pull-down) controlling negative rail startup/shutdown sequence independently from VP. |
| D1 ENP | Enable input for VBST and VP regulators | Active-high logic input (1MΩ pull-down) allowing independent sequencing of positive rail relative to VN and VBST. |
| B3 VP | Positive LDO output | Stable +5.5V (default) supply for TFT source driver ICs; includes internal 80Ω discharge resistor for fast turn-off. |
| D3 VN | Negative charge pump output | Stable –5.5V (default) supply for TFT gate driver bias; includes internal 35Ω discharge resistor and substrate tie (VSUB) to VN. |
| C2 SDA / C3 SCL | I²C serial data/clock interface | Two-wire digital bus for real-time adjustment of output voltages, soft-start times, and sequencing order without hardware changes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous FETs | Eliminates need for external high-side/low-side MOSFETs in boost and charge pump stages, reducing BOM count and layout complexity. |
| Programmable sequencing | Configurable turn-on/off order between VP and VN via register bits, preventing latch-up or reverse-bias damage to display panels during power transitions. |
| On-chip compensation & feedback | Removes requirement for external compensation networks, ensuring stable regulation across temperature and load while shrinking solution size to 18mm². |
| I²C-adjustable outputs | Enables dynamic voltage scaling in firmware to match panel-specific VCOM or gate-on requirements, supporting multiple display variants with one hardware design. |
| Integrated VP/VN discharge resistors | Ensures rapid rail collapse (<1ms typical) when disabled, meeting display panel safety and ESD immunity requirements during sleep mode. |
Applications
| Smartphone TFT-LCD Power | Tablet Display Bias Supply |
|---|---|
Use Scenario: Powering source and gate driver ICs in 4.0"–6.0" smartphone LCD panels with narrow bezels and Li-ion battery operation. IC Role / Device Role / Timing Role: Dual-rail power management IC generating synchronized ±5.5V rails with programmable soft-start and sequencing to prevent panel flicker or damage during boot. Use Value: Enables <18mm² total solution size and >89% efficiency at 12mA, extending battery runtime while meeting stringent mechanical constraints. | Use Scenario: Providing adjustable ±6V bias for high-resolution 7"–10" tablet LCDs requiring precise VCOM tuning and low-noise gate-on voltage. IC Role / Device Role / Timing Role: Programmable dual-output power IC delivering stable, sequenced rails with I²C-controlled voltage fine-tuning per panel batch calibration. Use Value: Supports ±4.5V to ±7V output range in 50mV steps, eliminating need for multiple fixed-voltage parts and simplifying inventory across display SKUs. |
| Portable Medical Display | Industrial Handheld HMI |
Use Scenario: Supplying dual-polarity bias for monochrome or color STN/TFT displays in battery-powered medical monitors with strict reliability and thermal limits. IC Role / Device Role / Timing Role: High-integration power IC with thermal shutdown (150°C), –40°C to +85°C rating, and 1µA shutdown current for long-term standby operation. Use Value: Delivers certified operational robustness in critical environments where display failure compromises patient data visibility. | Use Scenario: Powering ruggedized LCDs in warehouse scanners, field meters, or portable test equipment operating from 3.7V Li-ion packs. IC Role / Device Role / Timing Role: Compact, efficient dual-rail generator with integrated discharge paths and undervoltage protection on all outputs to ensure safe power cycling. Use Value: Reduces external component count by >50% versus discrete solutions, improving MTBF and easing IPC Class 3 assembly validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail display power applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65136RGTR | Fixed ±5.0V outputs; no I²C interface; requires external resistors for voltage adjustment; larger 3mm × 3mm QFN package. | Limited to fixed-rail designs; lacks dynamic voltage scaling and sequencing control needed for multi-panel platforms. | Select when cost sensitivity outweighs programmability needs and board space allows larger package. |
| MAX17205ETE+T | Supports ±5.5V but uses SPI instead of I²C; includes integrated backlight LED driver; higher quiescent current (5µA vs. 1µA). | Better suited for integrated display modules combining power and lighting; less optimal for pure bias-only applications with strict shutdown current budgets. | Choose when simultaneous LED backlight control is required and I²C bus resources are constrained. |
Compared with TPS65136RGTR and MAX17205ETE+T, the ISL98608II55Z-T uniquely combines ultra-compact WLCSP packaging, I²C-based fine-grained voltage control (50mV steps), and sub-2µA shutdown current-making it optimal for next-generation space- and battery-limited handheld displays demanding flexibility and minimal footprint.
Availability
ISL98608II55Z-T is available at Aetrix Electronics and suitable for smartphone TFT-LCD power, tablet display bias supply, portable medical display, and industrial handheld HMI requiring stable component supply, tight thermal performance, and ultra-small form factor.
Supply support for ISL98608II55Z-T 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
Renesas Electronics Corporation acquired Intersil in 2017 and continues to develop and support its high-performance analog and power management portfolio.
The ISL98608II55Z-T belongs to Renesas' display power management IC family, engineered specifically for compact, battery-operated LCD and OLED display systems requiring tightly regulated, sequenced dual-rail supplies with minimal external components.
FAQ
What is the default output voltage configuration of the ISL98608II55Z-T?
The ISL98608II55Z-T defaults to +5.5V on VP and –5.5V on VN at power-up, as defined by factory-programmed register values (Register 0x09 = 0x00 for VP, Register 0x08 = 0x00 for VN). These voltages are fully adjustable via I²C commands to any value between +4.5V/+7.0V and –4.5V/–7.0V in 50mV increments, enabling precise matching to display panel specifications without hardware modification. This behavior is confirmed in the Electrical Specifications table on page 7 of FN8711 Rev.1.00.
Does the ISL98608II55Z-T require external compensation components?
No, the ISL98608II55Z-T integrates all compensation and feedback circuitry internally, eliminating the need for external capacitors or resistors in the regulation loop. This integration reduces total solution size to just 18mm² and ensures stable operation across –40°C to +85°C without tuning. The datasheet explicitly states "ISL98608 integrates all compensation and feedback components" on page 1, and the Application Circuit Diagram (Figure 3, page 4) shows zero external compensation elements connected to VP or VN. This design choice simplifies layout and improves production yield.
How does the ISL98608II55Z-T manage power sequencing between VP and VN rails?
The ISL98608II55Z-T provides programmable sequencing control through Registers 0x04 (startup) and 0x05 (shutdown), allowing independent enable/disable timing for VP and VN. Setting bit b4 in Register 0x04 to '0' sequences VP before VN during startup, while '1' enables simultaneous turn-on. Similarly, Register 0x05 b4 controls shutdown order. This prevents reverse biasing or latch-up in TFT panels during transitions. Performance curves in Figures 37–43 and 45–52 of FN8711 Rev.1.00 validate this behavior under varying input voltages and load conditions.
What package type and dimensions does the ISL98608II55Z-T use?
The ISL98608II55Z-T uses a 16-ball, 4×4 array Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch and physical dimensions of 1.744mm × 1.744mm. This RoHS-compliant package is specified in the Ordering Information table (page 4) and Package Outline Drawing (page 39) of FN8711 Rev.1.00. Its ultra-compact size enables placement directly beneath narrow-bezel display flex cables, making it ideal for modern smartphone and wearable display modules where board area is at a premium.
Can the ISL98608II55Z-T operate from a 2.5V input supply?
Yes, the ISL98608II55Z-T supports an input voltage range of 2.5V to 5.0V, as specified in the Recommended Operating Conditions table (page 6) and validated in Figures 37, 41, 45, and 49 of FN8711 Rev.1.00, which show successful soft-start and regulation at VIN = 2.5V. This capability allows direct connection to partially discharged Li-ion cells (down to ~2.8V) or low-dropout regulators in multi-rail systems, ensuring reliable operation across full battery discharge cycles without brownout.
ISL98608II55Z-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Converter, TFT LCD
- Voltage - Input:
- 2.5V ~ 5V
- Number of Outputs:
- 2
- Voltage - Output:
- ±4.5V ~ ±7V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLCSP (1.74x1.74)
ISL98608II55Z-T FAQ
1.How can I place an order for ISL98608II55Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL98608II55Z-T 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 ISL98608II55Z-T reliable?
The price and inventory of ISL98608II55Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL98608II55Z-T is usually 5 days.
3.What payment methods are accepted for ISL98608II55Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL98608II55Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL98608II55Z-T?
ISL98608II55Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL98608II55Z-T 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 ISL98608II55Z-T?
For technical support, including ISL98608II55Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL98608II55Z-T requirements.
6.How does Aetrix verify that ISL98608II55Z-T is sourced from the original manufacturer or authorized distributors?
All ISL98608II55Z-T 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 ISL98608II55Z-T meets industry standards.
7.What is the process for return or replacement of ISL98608II55Z-T?
All ISL98608II55Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL98608II55Z-T, 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 ISL98608II55Z-T part is unused and in its original packaging.
Return procedure for ISL98608II55Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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