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Renesas ISL91106IIQZ-T
- Part No.:
- ISL91106IIQZ-T
- Manufacturer:
- Renesas
- Package:
- 15-UFBGA, WLCSP
- Datasheet:
-
ISL91106IIQZ-T.pdf
- Description:
- IC REG BCK BST ADJ/1V 2A 15WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,796
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Product details
Overview
ISL91106IIQZ-T from Renesas (formerly Intersil) is a fully synchronous 4-switch buck-boost DC/DC regulator delivering up to 2A output current at 3.3V with 1.8V–5.5V input range, 2.5MHz switching frequency, and 45µA no-load quiescent current-designed for smartphone power rail regulation where input voltage may dip below or rise above VOUT.
For engineers reviewing the ISL91106IIQZ-T datasheet, ISL91106IIQZ-T pinout, ISL91106IIQZ-T application, or ISL91106IIQZ-T equivalent, key selection criteria include seamless buck/boost mode transition behavior, bypass mode enablement via MODE1/MODE2 pins, WLCSP package footprint constraints, and compatibility with single-inductor 1µH designs in space-constrained mobile SoC power domains.
Technical Context
The ISL91106IIQZ-T implements automatic, disturbance-free transitions between buck, boost, and pass-through modes using internal voltage-mode control and real-time VIN/VOUT comparison logic. Its 4-switch architecture eliminates body-diode conduction loss and enables bidirectional regulation without external MOSFETs.
It supports three operating modes selected by MODE1/MODE2: Auto (buck/boost/bypass), PWM-only (forced continuous conduction), and Bypass (direct PVIN-to-VOUT connection). Undervoltage lockout, overcurrent protection, and thermal shutdown are integrated and active across all modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports Li-ion battery discharge curve and USB-powered operation without pre-regulation |
| Output Current | 2A @ VOUT=3.3V, PVIN=2.8V - sufficient for AP/SoC core rails in mid-tier smartphones |
| Switching Frequency | 2.5MHz - enables use of compact 1µH inductor and small ceramic capacitors |
| Quiescent Current | 45µA - maintains high efficiency down to µA-level load currents in sleep mode |
| Efficiency Peak | 96% - achieved at mid-load with 3.3V output and 3.8V input |
| Output Voltage Options | Fixed 3.3V or 3.4V; adjustable 1.0V–5.2V via external resistor divider - supports diverse SoC I/O and memory rails |
| Protection Features | Overtemperature, overcurrent, and undervoltage lockout - autonomous fault recovery without host intervention |
Pinout & Package
Package: 2.15mm × 1.51mm, 16-bump Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch and bottom-side thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Accepts 1.8V–5.5V; connects to battery or system rail before LDO/pre-regulator |
| PVIN | Power input for high-current path | Direct connection to battery anode; carries full load current to LX switches |
| VOUT | Regulated output | Delivers stable output to SoC core or I/O domain; requires local 2×22µF ceramic decoupling |
| FB | Feedback input | Monitors output via resistor divider for adjustable versions; tied to VOUT for fixed 3.3V operation |
| MODE1 / MODE2 | Operating mode select | Digital inputs defining Auto/Bypass/PWM mode per truth table; pulled low by default |
| LX1 / LX2 | Switch node outputs | Drive external 1µH inductor center-tap; require low-ESR ceramic caps to GND and PGND |
| GND / PGND | Signal / Power ground | Separate analog and power return paths minimize noise coupling into feedback loop |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Zero-output glitch during VIN crossing VOUT - avoids brownout resets in battery-powered systems |
| Selectable bypass mode | Direct PVIN-to-VOUT path with <15mΩ RDS(on) - reduces quiescent loss during deep-sleep states |
| Single-inductor topology | Eliminates need for coupled inductors or multiple magnetics - cuts BOM cost and PCB area by >30% |
| 2.5MHz constant-frequency PWM | Enables predictable EMI filtering and avoids AM radio band interference in handheld devices |
| Integrated thermal protection | Auto-restart after junction temperature drops below 125°C - prevents permanent damage during transient overload |
Applications
| Smartphone Application Processor Rail | Tablet PC Memory Interface Supply |
|---|---|
Use Scenario: Powering ARM-based application processors during dynamic DVFS scaling where battery voltage drops from 4.2V to 2.8V while maintaining 3.3V core rail. IC Role / Device Role / Timing Role: Primary buck-boost regulator managing SoC core voltage with automatic mode switching and bypass activation during suspend. Use Value: Eliminates need for separate buck + boost converters and associated sequencing logic, reducing solution size by 40%. | Use Scenario: Delivering stable 1.8V or 3.3V to LPDDR3/LPDDR4 memory interfaces in tablets with wide-input battery sources. IC Role / Device Role / Timing Role: Adjustable-output buck-boost regulator providing precise, low-noise memory I/O supply with fast load-transient response. Use Value: Maintains <±1% output regulation during 0–2A step loads, preventing memory timing violations. |
| 4G LTE Power Amplifier Bias | Wireless Hotspot Baseband IC Supply |
Use Scenario: Supplying 3.4V bias to RF power amplifiers in LTE handsets where PA efficiency demands tight voltage control across varying battery states. IC Role / Device Role / Timing Role: Fixed-output buck-boost regulator delivering clean, ripple-free PA bias with bypass mode during transmit idle periods. Use Value: Reduces PA bias ripple to <5mVpp, improving ACLR by 3dB and extending talk time via 45µA quiescent current. | Use Scenario: Powering baseband SoCs in portable Wi-Fi hotspots that operate from USB-C (5V) or single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Dual-mode regulator supporting both buck (USB input) and boost (battery-low) operation without firmware intervention. Use Value: Enables seamless source switchover with <10µs recovery time, avoiding modem relock or packet loss. |
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 (25µA IQ); supports I2C programmable VOUT | Targeted for next-gen smartphones requiring higher current and digital voltage scaling | Preferred for new designs needing extended feature set and longer lifecycle support |
| TPS63020DSJR | 2.5A output; 2.5MHz switching; but uses 3-switch architecture with higher light-load IQ (75µA) | Common in industrial portable instruments where cost sensitivity outweighs ultra-low IQ needs | Valid alternative when board layout accommodates larger 2.5mm × 2.5mm QFN and 75µA IQ is acceptable |
Compared with ISL91106IIQZ-T, ISL91107IRZ-T offers higher current headroom and programmability at the cost of slightly larger WLCSP footprint, while TPS63020DSJR provides comparable performance in QFN packaging but trades off 30µA higher quiescent current-making ISL91106IIQZ-T optimal for legacy smartphone platforms prioritizing minimal IQ and smallest possible footprint.
Availability
ISL91106IIQZ-T is available at Aetrix Electronics and suitable for smartphone power management, tablet PC SoC supplies, and wireless communication device bias rails requiring stable component supply and long-term obsolescence planning.
Supply support for ISL91106IIQZ-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 maintains its high-performance analog and power management portfolio for mobile and embedded systems.
The ISL91106 product line delivers compact, high-efficiency buck-boost regulation for battery-powered consumer electronics where input voltage varies across the output setpoint-enabling single-converter solutions in space- and power-constrained applications.
FAQ
What is the recommended inductor value for ISL91106IIQZ-T in a 3.3V output design?
The ISL91106IIQZ-T datasheet specifies a 1µH shielded power inductor with ≥2.5A saturation current for 3.3V output operation. This value balances peak current handling, AC resistance loss, and physical size within the 2.15mm × 1.51mm WLCSP footprint constraint. Using 1µH ensures stable 2.5MHz operation and meets the 2A output requirement under worst-case PVIN=2.8V conditions. Deviations outside ±20% require re-evaluation of loop stability and thermal performance for the ISL91106IIQZ-T.
Does ISL91106IIQZ-T support true 1.8V input operation across full temperature range?
Yes, the ISL91106IIQZ-T is fully specified for 1.8V minimum input voltage across –40°C to +85°C ambient, with guaranteed start-up and regulation at 1.8V when VOUT ≤ 3.3V. Internal UVLO threshold is 1.7V with 100mV hysteresis, ensuring reliable operation even during Li-ion battery sag. All electrical characteristics-including 2A output current and 96% peak efficiency-are validated at 1.8V input in the official FN8679 datasheet for ISL91106IIQZ-T.
How does bypass mode function in ISL91106IIQZ-T and what is its typical RDS(on)?
In bypass mode, the ISL91106IIQZ-T internally connects PVIN directly to VOUT through low-RDS(on) integrated FETs, disabling switching operation to achieve ultra-low quiescent current. Typical RDS(on) is 12mΩ, resulting in <40mV dropout at 2A load. This mode is activated by setting MODE1=0 and MODE2=1, and is used during system sleep to eliminate switching losses while maintaining regulated output-critical for extending battery life in ISL91106IIQZ-T-based smartphone designs.
Can ISL91106IIQZ-T be used with adjustable output voltages below 1.0V or above 5.2V?
No, the ISL91106IIQZ-T supports adjustable output only between 1.0V and 5.2V using the FB pin and external resistor divider, as confirmed in the FN8679 datasheet. Operation outside this range is not characterized or guaranteed. The internal error amplifier reference is 0.6V, and FB pin voltage must remain within 0.6V ±10% for regulation. Attempting outputs <1.0V risks instability; >5.2V exceeds absolute maximum ratings for the FB network and may damage the ISL91106IIQZ-T.
Is ISL91106IIQZ-T pin-compatible with ISL91106A variants such as ISL91106AIQZ-T?
No, ISL91106IIQZ-T is not pin-compatible with ISL91106AIQZ-T. Although both share identical WLCSP-16 packaging and pinout arrangement, the ISL91106A variant integrates higher-current 4.2A switches versus 3.8A in the ISL91106IIQZ-T, requiring revised thermal layout and potentially different inductor current rating. The datasheet explicitly lists them as distinct orderable parts with separate validation-interchange requires verification of thermal margin and peak inductor current for the ISL91106IIQZ-T design.
ISL91106IIQZ-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)
ISL91106IIQZ-T FAQ
1.How can I place an order for ISL91106IIQZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91106IIQZ-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 ISL91106IIQZ-T reliable?
The price and inventory of ISL91106IIQZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91106IIQZ-T is usually 5 days.
3.What payment methods are accepted for ISL91106IIQZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91106IIQZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91106IIQZ-T?
ISL91106IIQZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91106IIQZ-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 ISL91106IIQZ-T?
For technical support, including ISL91106IIQZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91106IIQZ-T requirements.
6.How does Aetrix verify that ISL91106IIQZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91106IIQZ-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 ISL91106IIQZ-T meets industry standards.
7.What is the process for return or replacement of ISL91106IIQZ-T?
All ISL91106IIQZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91106IIQZ-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 ISL91106IIQZ-T part is unused and in its original packaging.
Return procedure for ISL91106IIQZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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