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Renesas ISL91106IIN-EVZ
- Part No.:
- ISL91106IIN-EVZ
- Manufacturer:
- Renesas
- Package:
- Datasheet:
-
ISL91106IIN-EVZ.pdf
- Description:
- EVAL BOARD FOR ISL91106
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Product details
Overview
ISL91106IIN-EVZ from Renesas (formerly Intersil) is a high-efficiency, 2A synchronous buck-boost regulator with automatic mode transition and selectable bypass mode, operating from 1.8V to 5.5V input and delivering fixed 3.3V or adjustable 1V–5.2V output in a 2.15mm×1.51mm WLCSP package for smartphone power management.
For engineers reviewing the ISL91106IIN-EVZ datasheet, ISL91106IIN-EVZ pinout, ISL91106IIN-EVZ application, or ISL91106IIN-EVZ equivalent, key selection criteria include its 2.5MHz switching frequency, 45µA quiescent current, seamless buck/boost transition behavior, and support for forced PWM and bypass modes in space-constrained portable systems.
Technical Context
The ISL91106IIN-EVZ implements a fully synchronous 4-switch buck-boost topology that enables continuous regulation across input voltages both above and below the output voltage without discontinuity or output droop. Its control architecture supports automatic mode selection (buck, boost, or pass-through) based on real-time VIN–VOUT relationship.
It integrates internal 3.8A power switches, supports MODE1/MODE2 logic-controlled operation modes (disable, bypass, PWM-enforced, auto-transition), and includes comprehensive protection: thermal shutdown, cycle-by-cycle overcurrent, and input undervoltage lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, Li-poly, or USB-powered systems without pre-regulation. |
| Output Current (PVIN=2.8V, VOUT=3.3V) | 2A - verified delivery capability under typical smartphone core rail conditions. |
| Switching Frequency | 2.5MHz - enables use of compact 1µH inductor and small ceramic capacitors, reducing solution footprint. |
| Quiescent Current | 45µA - maintains high light-load efficiency during system sleep or idle states. |
| Peak Efficiency | 96% - achieved at mid-load with 3.3V output and 3.8V input, minimizing thermal stress. |
| Package | 2.15mm × 1.51mm WLCSP - ultra-small footprint compatible with thin mobile PCB stackups. |
| Protection Features | Overtemperature, overcurrent, and input UVLO - ensures robust operation in thermally dense handheld environments. |
Pinout & Package
ISL91106IIN-EVZ uses a 16-ball, 0.4mm pitch Wafer-Level Chip-Scale Package (WLCSP) with exposed thermal pad. Pin functions are defined per the ISL91106 datasheet Figure 1 and AN1959 evaluation board schematic.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN | Main power input | Accepts 1.8V–5.5V supply; connects to input capacitor and inductor high-side node. |
| VIN | Bias supply input | Provides internal LDO bias; must be ≥ PVIN – 0.3V and decoupled with 10µF ceramic. |
| VOUT | Regulated output | Delivers stable output; connects directly to load and feedback network. |
| FB | Feedback input | Senses output voltage via resistor divider for adjustable configurations (not used for fixed 3.3V). |
| MODE1 / MODE2 | Mode control inputs | Digital logic inputs selecting disable, bypass, forced PWM, or auto-transition operation. |
| LX1 / LX2 | Switch node outputs | Drive external inductor; require low-ESR ceramic caps and careful layout for EMI control. |
| GND / PGND | Signal / power ground | Separate grounds minimize noise coupling between control circuitry and high-current paths. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck-boost mode transition | Zero-output-droop crossover between buck and boost regions eliminates need for external sequencing or supervision. |
| Selectable bypass mode | Direct conduction path reduces quiescent power to <1µA during system deep-sleep, extending battery life. |
| 2.5MHz constant-frequency PWM | Enables consistent EMI profile and predictable filter design with minimal inductor size (1µH typical). |
| Integrated 3.8A power switches | Eliminates external MOSFETs and gate drivers, reducing BOM count and layout complexity. |
| Single-inductor architecture | Reduces solution area by ~40% vs. dual-inductor buck-boost alternatives while maintaining high efficiency. |
Applications
| Smartphone Core Power Rail | Tablet PC I/O Supply |
|---|---|
Use Scenario: Powers application processor I/O or memory interface rails where input voltage varies widely (e.g., 3.0–4.2V battery) and output must remain stable at 3.3V. IC Role / Device Role / Timing Role: Primary buck-boost DC/DC regulator providing regulated 3.3V with seamless VIN–VOUT crossover. Use Value: Eliminates need for separate buck and boost converters, reducing component count and PCB area by >30%. | Use Scenario: Supplies USB PHY, SD card controller, or display interface in tablets with dynamic battery voltage and tight thermal constraints. IC Role / Device Role / Timing Role: Adjustable-output buck-boost regulator supporting 1.8V–3.3V rails via FB resistor network. Use Value: 45µA quiescent current extends standby time; 2.5MHz operation allows use of tiny 0603-size magnetics. |
| Wireless Modem PA Bias | 2G/3G/4G RF Front-End |
Use Scenario: Delivers clean, low-noise 3.3V bias to LTE/WCDMA power amplifiers during burst transmission and idle periods. IC Role / Device Role / Timing Role: High-efficiency, low-ripple buck-boost regulator with fast load transient response (<10µs settling). Use Value: 96% peak efficiency minimizes heat near sensitive RF sections; bypass mode cuts leakage during TX off-time. | Use Scenario: Powers RF transceiver ICs requiring stable 2.8V–3.4V rails across varying battery states in multi-band cellular handsets. IC Role / Device Role / Timing Role: Fixed-output (3.3V/3.4V) or resistor-programmable buck-boost regulator with integrated protection. Use Value: Overcurrent and thermal protection prevent damage during antenna mismatch or PA fault conditions. |
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 0.6V–5.2V adjustable output. | Targeted for next-gen smartphones requiring higher current headroom and longer battery life in always-on sensors. | Preferred for new designs where higher output current and lower quiescent current are required. |
| TPS63020DSJR | 2A output; 2.5MHz switching; 25µA IQ; 1.8V–5.5V input; but uses QFN-10 package (3mm×2mm) and lacks bypass mode. | Suitable for industrial IoT nodes where board space is less constrained and deep-sleep current is less critical than cost. | Consider when WLCSP footprint is not mandatory and bypass functionality is unnecessary. |
Compared with ISL91106IIN-EVZ, ISL91107IRZ offers higher current and lower IQ for future-proofed designs, while TPS63020DSJR provides QFN-based cost and layout simplicity at the expense of bypass mode and package size.
Availability
ISL91106IIN-EVZ is available at Aetrix Electronics and suitable for smartphone power management, tablet PC I/O supplies, wireless modem PA bias, and 2G/3G/4G RF front-end applications requiring stable component supply and legacy design continuity.
Supply support for ISL91106IIN-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 connectivity solutions for automotive, industrial, and consumer markets.
The ISL91106 product line was designed specifically for high-density, battery-powered portable electronics requiring seamless input-voltage-flexible regulation with minimal footprint and ultra-low quiescent power.
FAQ
What is the primary function of the ISL91106IIN-EVZ?
The ISL91106IIN-EVZ is a synchronous 4-switch buck-boost DC/DC regulator that delivers up to 2A output current while automatically transitioning between buck and boost modes. It supports input voltages from 1.8V to 5.5V and provides fixed 3.3V/3.4V or adjustable 1V–5.2V outputs. Its design enables stable regulation across varying battery voltages in portable devices without output disturbance - a core requirement for the ISL91106IIN-EVZ in modern smartphones.
Does the ISL91106IIN-EVZ support bypass mode, and how is it enabled?
Yes, the ISL91106IIN-EVZ supports a selectable bypass mode to minimize power consumption during system sleep. It is enabled by setting MODE1 = LOW and MODE2 = HIGH (0/1 logic state). In this mode, the device establishes a low-resistance conduction path between PVIN and VOUT, reducing quiescent current to under 1µA. This feature is explicitly documented in the ISL91106IIN-EVZ datasheet and confirmed in AN1959.
What package type and dimensions does the ISL91106IIN-EVZ use?
The ISL91106IIN-EVZ uses a 16-ball, 0.4mm pitch Wafer-Level Chip-Scale Package (WLCSP) measuring 2.15mm × 1.51mm. This ultra-compact package includes an exposed thermal pad for enhanced heat dissipation in thin-profile mobile PCBs. The pinout and solder mask layout are defined in the official ISL91106IIN-EVZ datasheet and matched on the ISL91106IIx-EVZ evaluation board.
What is the switching frequency and why does it matter for the ISL91106IIN-EVZ?
The ISL91106IIN-EVZ operates at a fixed 2.5MHz switching frequency. This high frequency allows the use of small external components - notably a 1µH inductor and compact ceramic capacitors - significantly reducing total solution size. It also enables tighter EMI control and faster transient response, which is essential for powering noise-sensitive RF circuits in the ISL91106IIN-EVZ's target applications.
Is the ISL91106IIN-EVZ still recommended for new designs?
No - the ISL91106IIN-EVZ is marked "NOT RECOMMENDED FOR NEW DESIGNS" in the official FN8679 datasheet, with ISL91107IRZ cited as the recommended replacement. However, the ISL91106IIN-EVZ remains supported for legacy design continuity, repair, and maintenance. Aetrix Electronics maintains active inventory and supply chain visibility for the ISL91106IIN-EVZ to serve existing production programs.
ISL91106IIN-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
ISL91106IIN-EVZ FAQ
1.How can I place an order for ISL91106IIN-EVZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91106IIN-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 ISL91106IIN-EVZ reliable?
The price and inventory of ISL91106IIN-EVZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91106IIN-EVZ is usually 5 days.
3.What payment methods are accepted for ISL91106IIN-EVZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91106IIN-EVZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91106IIN-EVZ?
ISL91106IIN-EVZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91106IIN-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 ISL91106IIN-EVZ?
For technical support, including ISL91106IIN-EVZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91106IIN-EVZ requirements.
6.How does Aetrix verify that ISL91106IIN-EVZ is sourced from the original manufacturer or authorized distributors?
All ISL91106IIN-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 ISL91106IIN-EVZ meets industry standards.
7.What is the process for return or replacement of ISL91106IIN-EVZ?
All ISL91106IIN-EVZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL91106IIN-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 ISL91106IIN-EVZ part is unused and in its original packaging.
Return procedure for ISL91106IIN-EVZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL91106IIN-EVZ Tags
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