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Renesas ISL91106IIQ-EVZ
- Part No.:
- ISL91106IIQ-EVZ
- Manufacturer:
- Renesas
- Package:
- Datasheet:
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ISL91106IIQ-EVZ.pdf
- Description:
- EVAL BOARD FOR ISL91106
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Product details
Overview
ISL91106IIQ-EVZ from Renesas (formerly Intersil) is a high-efficiency, 2A synchronous buck-boost DC/DC regulator with automatic mode transition, 1.8V–5.5V input range, 3.3V fixed output, and selectable bypass mode for ultra-low-power states. It uses a 4-switch architecture and operates at 2.5MHz to minimize external component count in space-constrained mobile power rails.
For engineers reviewing the ISL91106IIQ-EVZ datasheet, ISL91106IIQ-EVZ pinout, ISL91106IIQ-EVZ application, or ISL91106IIQ-EVZ equivalent, key selection criteria include its seamless buck/boost transition behavior, 45µA no-load quiescent current, WLCSP package footprint, and support for sleep-mode bypass operation in battery-powered portable systems.
Technical Context
The ISL91106IIQ-EVZ implements a fully synchronous 4-switch buck-boost topology that dynamically selects between buck, boost, and pass-through modes based on real-time VIN–VOUT relationship-without output voltage glitch or control-loop interruption. Its MODE1/MODE2 logic inputs configure bypass, forced PWM, or auto-mode operation.
It integrates overtemperature, overcurrent, and undervoltage protection circuits, and supports fixed 3.3V output without external feedback resistors. The device is optimized for single-inductor, low-PCB-area solutions where input voltage may dip below or rise above regulated output during battery discharge or USB-C PD negotiation.
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 3.3V/5V rails without re-buck or LDO staging |
| Output Current (PVIN=2.8V, VOUT=3.3V) | 2A - delivers full rated load under worst-case battery mid-discharge condition |
| Switching Frequency | 2.5MHz - enables use of compact 1µH inductor and 22µF ceramic output capacitors |
| No-Load Quiescent Current | 45µA - extends system standby time in always-on sensor or modem subsystems |
| Output Voltage | Fixed 3.3V - eliminates external resistor divider, reducing BOM count and layout sensitivity |
| Peak Efficiency | 96% - minimizes thermal dissipation in sealed handheld enclosures |
| Protection Features | OTP, OCP, UVLO - autonomous shutdown prevents damage during fault conditions without host intervention |
Pinout & Package
Package: 2.15mm × 1.51mm, 16-ball WLCSP (Wafer-Level Chip Scale Package) with 0.4mm pitch and bottom-side thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input supply rail | Accepts 1.8V–5.5V; connects directly to battery or USB input; decoupled with 10µF ceramic capacitor |
| PVIN | Power input for internal LDOs and gate drivers | Must be tied to VIN or separately filtered; supplies bias for high-side and low-side MOSFET drivers |
| VOUT | Regulated output node | Delivers up to 2A at 3.3V; connected to 2×22µF ceramic output capacitors and load |
| FB | Feedback reference input | Internally shorted to GND for fixed 3.3V operation; left open or configured with resistor divider for adjustable outputs |
| MODE1 / MODE2 | Dual-function mode select inputs | Set bypass (0/1), forced PWM (1/0), or auto-mode (1/1); pulled low via 100kΩ resistors by default |
| LX1 / LX2 | Switch node connections | Drive external 1µH inductor center-tap; require low-ESR ceramic routing and tight loop area |
| GND / PGND | Analog and power ground returns | Separate AGND and PGND pins reduce noise coupling into feedback and enable clean switching node return paths |
| EN | Enable control input | Active-high logic input; must be ≥1.2V to enable regulation; ties to VIN via 100kΩ pull-up in typical applications |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck/boost mode transition | Zero-output-glitch transitions eliminate need for external sequencing or hold-up capacitance during VIN crossing VOUT |
| Selectable bypass mode | Direct VIN-to-VOUT conduction path reduces quiescent power to <1µA, extending battery life in deep-sleep states |
| 2.5MHz constant-frequency operation | Enables use of sub-2mm inductors and avoids AM radio band interference in RF-sensitive designs |
| Integrated 4-switch power stage | Eliminates external MOSFETs and gate drivers, reducing solution size by >40% vs discrete buck-boost controllers |
| Thermal-enhanced WLCSP | Bottom thermal pad improves junction-to-PCB thermal resistance to ≤75°C/W, supporting 2A continuous load in 4-layer boards |
Applications
| Smartphone Core Power Rail | Tablet PMIC Secondary Output |
|---|---|
Use Scenario: Supplying 3.3V to application processor I/O, camera interface, or display timing controller during dynamic battery voltage swing (3.0V–4.3V). IC Role / Device Role / Timing Role: Primary buck-boost regulator delivering stable 3.3V from varying Li-ion source while maintaining <10mV output ripple across load steps. Use Value: Seamless mode transition prevents reset or data corruption when battery voltage crosses 3.3V during discharge or charging cycles. | Use Scenario: Providing low-noise 3.3V to Wi-Fi/Bluetooth combo modules during active transmit bursts and deep-sleep intervals. IC Role / Device Role / Timing Role: System-level power converter enabling rapid entry/exit from bypass mode to meet Bluetooth LE advertising interval timing requirements. Use Value: 45µA quiescent current and <1µA bypass mode current extend tablet standby time beyond 30 days on single charge. |
| 4G LTE Power Amplifier Bias | Wireless Headset Audio Codec Supply |
Use Scenario: Delivering 3.3V to 2G/3G/4G PA modules requiring fast transient response and minimal voltage droop during RF burst transmission. IC Role / Device Role / Timing Role: High-current, low-impedance power source with <5µs load-step recovery time and 2.5MHz bandwidth for PA envelope tracking compatibility. Use Value: 96% peak efficiency reduces thermal load on adjacent RF front-end components, improving PA linearity and EVM performance. | Use Scenario: Powering stereo audio codec and MEMS microphone bias in true wireless stereo (TWS) earbuds with tight space constraints. IC Role / Device Role / Timing Role: Compact, single-inductor buck-boost regulator meeting 2.15mm × 1.51mm board area limit while supporting battery voltage down to 2.5V. Use Value: WLCSP package enables direct placement under codec IC, minimizing trace inductance and improving PSRR above 100kHz. |
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 | Higher 3A output capability; improved light-load efficiency (25µA IQ); supports 1.2V–5.5V input and 0.8V–5.2V adjustable output | Targeted for next-gen smartphones requiring higher current headroom and wider output flexibility | Preferred for new designs needing >2A or programmable output; not pin-compatible with ISL91106IIQ-EVZ |
| TPS63020DSJR | 2.5V–5.5V input; 2A output; 2.4MHz switching; 25µA IQ; 3.3V fixed option available | Offers integrated soft-start and power-good signal; lacks bypass mode and seamless mode transition | Suitable where bypass mode is unnecessary and PG signal is required; requires PCB redesign due to different pinout and package (SON-10) |
Compared with ISL91106IIQ-EVZ, ISL91107IRZ provides higher current and lower quiescent current but requires layout changes, while TPS63020DSJR offers power-good signaling at the cost of losing bypass functionality and smooth mode transitions-making ISL91106IIQ-EVZ uniquely suited for sleep-aware mobile SoC rails.
Availability
ISL91106IIQ-EVZ is available at Aetrix Electronics and suitable for smartphone power management, tablet secondary regulation, and wireless communication device biasing requiring stable component supply, long-term lifecycle support, and consistent WLCSP packaging.
Supply support for ISL91106IIQ-EVZ 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 (formerly Intersil) is a global semiconductor leader specializing in microcontrollers, analog power, and mixed-signal solutions for automotive, industrial, and communications markets.
The ISL91106 product line was designed specifically for high-efficiency, space-constrained buck-boost power conversion in battery-powered mobile devices where input voltage varies across the output setpoint.
FAQ
What is the primary function of the ISL91106IIQ-EVZ in a power management system?
The ISL91106IIQ-EVZ serves as a high-efficiency, single-inductor buck-boost DC/DC regulator delivering a fixed 3.3V output from an input range of 1.8V to 5.5V. Its core function is to maintain stable rail voltage during battery discharge or USB-C PD negotiation-without requiring external sequencing or hold-up capacitance-by automatically transitioning between buck, boost, and bypass modes. This ensures uninterrupted operation of critical subsystems like modems and sensors in portable electronics.
Does the ISL91106IIQ-EVZ support adjustable output voltages, or is it fixed at 3.3V only?
The ISL91106IIQ-EVZ supports both configurations: it defaults to a fixed 3.3V output when the FB pin is grounded internally, eliminating external resistors. However, it can also operate in adjustable mode by connecting an external resistor divider to the FB pin-enabling output voltages from 1.0V to 5.2V. The ISL91106IIQ-EVZ datasheet specifies that the FB pin voltage is regulated to 0.6V, allowing precise scaling using standard resistor values per the feedback equation VOUT = 0.6V × (1 + R1/R2).
How does the bypass mode in the ISL91106IIQ-EVZ reduce system power consumption?
In bypass mode, the ISL91106IIQ-EVZ disables its switching regulators and activates an internal low-resistance FET path from PVIN to VOUT, achieving near-direct conduction with <100mΩ on-resistance. This reduces quiescent current to under 1µA-compared to 45µA in normal operation-while maintaining regulated output voltage. The ISL91106IIQ-EVZ enters this state when MODE1=0 and MODE2=1, making it ideal for deep-sleep states in cellular modems or always-on sensor hubs where microamp-level leakage is critical.
What thermal considerations apply to the ISL91106IIQ-EVZ in a 2A continuous load application?
The ISL91106IIQ-EVZ uses a 2.15mm × 1.51mm WLCSP with an exposed thermal pad, and its thermal resistance (θJA) is specified at 75°C/W on a 4-layer PCB with 1-in² copper pour. At 2A output and 96% efficiency, power dissipation is ~270mW, resulting in ~20°C junction-to-ambient rise. To maintain reliability, the ISL91106IIQ-EVZ requires solid thermal vias under the pad connected to inner ground planes, and ambient temperature should remain below 85°C. The device includes thermal shutdown at 150°C with automatic recovery.
Is the ISL91106IIQ-EVZ pin-compatible with the ISL91106A variant or other members of the ISL91106 family?
Yes-the ISL91106IIQ-EVZ shares identical pinout, package dimensions, and footprint with all ISL91106 and ISL91106A variants (e.g., ISL91106IINZ, ISL91106AIIAZ). The only differences are internal switch current ratings (3.8A for ISL91106 vs. 4.2A for ISL91106A) and minor electrical specifications such as output current capability and efficiency curves. All share the same MODE1/MODE2 logic mapping, FB configuration, and protection thresholds-enabling drop-in replacement within the same family without PCB modification.
ISL91106IIQ-EVZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Packaging:
- Box
- Product Status:
- Obsolete
- Main Purpose:
- DC/DC, Step Up or Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- -
- Voltage - Input:
- 2A
- Regulator Topology:
- 1.8V ~ 5.5V
- Frequency - Switching:
- Buck-Boost
- Contents:
- 2.5MHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- ISL91106
ISL91106IIQ-EVZ FAQ
1.How can I place an order for ISL91106IIQ-EVZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91106IIQ-EVZ 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 ISL91106IIQ-EVZ reliable?
The price and inventory of ISL91106IIQ-EVZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91106IIQ-EVZ is usually 5 days.
3.What payment methods are accepted for ISL91106IIQ-EVZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91106IIQ-EVZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91106IIQ-EVZ?
ISL91106IIQ-EVZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91106IIQ-EVZ 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 ISL91106IIQ-EVZ?
For technical support, including ISL91106IIQ-EVZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91106IIQ-EVZ requirements.
6.How does Aetrix verify that ISL91106IIQ-EVZ is sourced from the original manufacturer or authorized distributors?
All ISL91106IIQ-EVZ 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 ISL91106IIQ-EVZ meets industry standards.
7.What is the process for return or replacement of ISL91106IIQ-EVZ?
All ISL91106IIQ-EVZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL91106IIQ-EVZ, 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 ISL91106IIQ-EVZ part is unused and in its original packaging.
Return procedure for ISL91106IIQ-EVZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL91106IIQ-EVZ Tags
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