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Renesas ISL91106IINZ-T
- Part No.:
- ISL91106IINZ-T
- Manufacturer:
- Renesas
- Package:
- 15-UFBGA, WLCSP
- Datasheet:
-
ISL91106IINZ-T.pdf
- Description:
- IC REG BCK BST ADJ/1V 2A 15WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,914
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Product details
Overview
ISL91106IINZ-T from Renesas Electronics (formerly Intersil) is a highly integrated synchronous 4-switch buck-boost DC/DC regulator delivering up to 2A output current at 3.3V with 1.8V–5.5V input range, 45µA quiescent current, and 96% peak efficiency. It operates in smartphones and tablets where input voltage may dip below or rise above the regulated rail during battery discharge or USB charging.
For engineers reviewing the ISL91106IINZ-T datasheet, ISL91106IINZ-T pinout, ISL91106IINZ-T application, or ISL91106IINZ-T equivalent, key selection criteria include seamless buck-boost mode transition, bypass mode enablement for ultra-low-power sleep states, WLCSP package footprint constraints, and compatibility with single-inductor power architectures.
Technical Context
The ISL91106IINZ-T implements a fully synchronous 4-switch topology enabling continuous conduction mode operation across buck, boost, and buck-boost regions without output voltage glitching. Its control logic automatically selects the optimal switching configuration based on real-time VIN–VOUT differential.
It supports three operating modes via MODE1/MODE2 pins: forced PWM (EN+PWM), auto-mode (EN+Auto), and bypass (Bypass). Bypass mode disconnects switching circuitry and routes PVIN directly to VOUT through internal low-RDS(on) FETs, reducing quiescent current to 45µA while maintaining regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports Li-ion battery discharge (2.8V–4.2V) and USB 5V input without external LDO pre-regulation |
| Output Current | 2A @ VOUT=3.3V, PVIN=2.8V - sufficient for AP SoC core rails or RF power amplifier bias in mobile devices |
| Switching Frequency | 2.5MHz - enables use of compact 1µH inductor and small ceramic capacitors, minimizing PCB area |
| Quiescent Current | 45µA - extends battery life in standby/sleep by minimizing no-load power loss |
| Peak Efficiency | 96% - reduces thermal load in thermally constrained smartphone modules |
| Output Voltage Options | Fixed 3.3V or 3.4V; adjustable 1.0V–5.2V via resistor divider - supports diverse SoC I/O and memory voltage requirements |
| Protection Features | Thermal shutdown, cycle-by-cycle overcurrent, and undervoltage lockout - ensures robust operation under fault conditions |
Pinout & Package
Package: 2.15mm × 1.51mm, 16-ball Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch and bottom-side thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 1.8V–5.5V main input; decoupled with 10µF ceramic capacitor |
| PVIN | Power input for high-current path | Direct connection to battery or high-current source; routed separately from VIN for noise isolation |
| VOUT | Regulated output node | Delivers up to 2A; requires 2×22µF ceramic output capacitance for stability |
| FB | Feedback input | Connects to resistor divider for adjustable output; open for fixed 3.3V operation |
| MODE1 / MODE2 | Operating mode select inputs | Digital control of bypass, PWM, or auto-mode; pulled low/high via resistors or host GPIO |
| LX1 / LX2 | Switch node connections | Drive external 1µH inductor; require tight layout to minimize EMI and switching losses |
| GND / PGND | Analog and power ground | Separate ground returns reduce noise coupling between control and power circuits |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Zero-output-glitch mode switching eliminates voltage droop during VIN crossing VOUT, critical for real-time processor operation |
| Selectable bypass mode | Direct PVIN-to-VOUT conduction path reduces IQ to 45µA, enabling >72-hour standby in always-on mobile sensors |
| Single-inductor architecture | Eliminates need for dual inductors or coupled inductors, cutting BOM cost and board space by ~30% vs traditional buck-boost |
| 2.5MHz fixed-frequency PWM | Enables full-size ceramic capacitors and sub-2mm inductors, supporting <25mm² total solution size |
| Integrated 3.8A power switches | Supports 2A continuous output with margin for transient peaks in burst-mode LTE transmission |
Applications
| Smartphone Application | Tablet PC Power Rail |
|---|---|
Use Scenario: Main SoC core voltage supply during dynamic DVFS scaling and battery voltage sag from 4.2V to 2.8V. IC Role / Device Role / Timing Role: Buck-boost regulator providing stable 3.3V rail independent of battery state. Use Value: Eliminates need for separate buck + boost converters, reducing component count and thermal hotspots. | Use Scenario: Always-on sensor hub powering accelerometers, gyroscopes, and ambient light sensors in sleep mode. IC Role / Device Role / Timing Role: Regulator operating in bypass mode to deliver 3.3V with 45µA IQ. Use Value: Extends battery life by >30% versus PWM-only regulators during multi-day idle periods. |
| 4G LTE Power Amplifier Bias | USB-C PD Input Conditioning |
Use Scenario: Supplying 3.4V bias to RF power amplifier during high-Power LTE transmission bursts. IC Role / Device Role / Timing Role: High-efficiency buck-boost delivering 2A peak current with minimal ripple. Use Value: Maintains PA linearity and EVM performance across full battery voltage range without output collapse. | Use Scenario: Adapting variable USB-C PD input (3.0V–5.5V) to fixed 3.3V system rail in portable accessories. IC Role / Device Role / Timing Role: Input-flexible regulator accepting wide-range PD source without intermediate conversion. Use Value: Enables single-chip power architecture for universal USB-C powered devices, simplifying compliance testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL91107IRZ-T | Higher 3A output capability; improved light-load efficiency; updated thermal design | Recommended for new designs per manufacturer notice; supports higher current AP SoCs | Preferred for production designs requiring extended lifecycle support and higher current headroom |
| TPS63020DSJR | 2.5V–5.5V input; 2A output; 2.4MHz switching; different pinout and MODE logic | Requires PCB redesign; lacks dedicated bypass mode but offers programmable frequency | Suitable when TI ecosystem integration or adjustable frequency is prioritized over ultra-low-IQ sleep |
Compared with ISL91106IINZ-T, ISL91107IRZ-T provides higher current capability and official replacement status, while TPS63020DSJR offers TI-specific toolchain support but demands layout changes and delivers higher light-load IQ (65µA).
Availability
ISL91106IINZ-T is available at Aetrix Electronics and suitable for smartphone power management, tablet PC SoC rails, 4G LTE power amplifier biasing, and USB-C PD input conditioning requiring stable component supply and long-term industrial availability.
Supply support for ISL91106IINZ-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 is a global semiconductor leader formed from the merger of Renesas Technology and NEC Electronics, specializing in microcontrollers, analog, power, and mixed-signal solutions.
The ISL91106IINZ-T belongs to Renesas' high-efficiency buck-boost regulator product line, designed specifically for space-constrained mobile and portable electronics requiring seamless voltage regulation across varying battery states.
FAQ
What is the maximum output current capability of the ISL91106IINZ-T?
The ISL91106IINZ-T delivers up to 2A of continuous output current when configured for 3.3V output with 2.8V input, as verified in the official datasheet Figure 2. This rating assumes proper thermal management using the WLCSP package's bottom thermal pad and recommended PCB copper area. The ISL91106IINZ-T integrates 3.8A-rated internal power switches to ensure safe operation under peak transient loads typical in mobile SoC applications.
Does the ISL91106IINZ-T support adjustable output voltage?
Yes, the ISL91106IINZ-T supports adjustable output voltage from 1.0V to 5.2V using an external resistor divider connected to the FB pin. When FB is left unconnected, the device defaults to its factory-trimmed fixed 3.3V output. This flexibility allows the ISL91106IINZ-T to serve multiple voltage domains within a single platform, such as I/O, memory, or peripheral rails, without requiring separate regulators.
How does bypass mode function in the ISL91106IINZ-T?
In bypass mode, the ISL91106IINZ-T disables all switching activity and connects PVIN directly to VOUT via low-RDS(on) internal FETs, reducing quiescent current to 45µA. This mode is activated by setting MODE1=0 and MODE2=1, and is intended for system sleep states where regulation must be maintained with minimal power draw. The ISL91106IINZ-T maintains output voltage accuracy within ±2% during bypass operation.
What package type and dimensions does the ISL91106IINZ-T use?
The ISL91106IINZ-T uses a 2.15mm × 1.51mm, 16-ball Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm ball pitch and an exposed thermal pad on the bottom. This ultra-compact package enables placement directly beneath processors or in narrow bezel areas of smartphones and tablets. The ISL91106IINZ-T's WLCSP footprint measures just 3.25mm², making it among the smallest buck-boost regulators qualified for mobile applications.
Is the ISL91106IINZ-T still recommended for new designs?
No - the ISL91106IINZ-T is marked "NOT RECOMMENDED FOR NEW DESIGNS" in the official datasheet (FN8679 Rev 2.00, Page 2), with ISL91107IRZ-T listed as the recommended replacement part. While the ISL91106IINZ-T remains available for legacy production and repair, new designs should evaluate the ISL91107IRZ-T for enhanced current capability, improved efficiency, and continued long-term support from Renesas Electronics.
ISL91106IINZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 15-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V (3.3V, 3.4V)
- Voltage - Output (Max):
- 5.2V
- Current - Output:
- 2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-WLCSP (1.51x2.15)
ISL91106IINZ-T FAQ
1.How can I place an order for ISL91106IINZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91106IINZ-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 ISL91106IINZ-T reliable?
The price and inventory of ISL91106IINZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91106IINZ-T is usually 5 days.
3.What payment methods are accepted for ISL91106IINZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91106IINZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91106IINZ-T?
ISL91106IINZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91106IINZ-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 ISL91106IINZ-T?
For technical support, including ISL91106IINZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91106IINZ-T requirements.
6.How does Aetrix verify that ISL91106IINZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91106IINZ-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 ISL91106IINZ-T meets industry standards.
7.What is the process for return or replacement of ISL91106IINZ-T?
All ISL91106IINZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91106IINZ-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 ISL91106IINZ-T part is unused and in its original packaging.
Return procedure for ISL91106IINZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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