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Renesas ISL91106AIINZ-T
- Part No.:
- ISL91106AIINZ-T
- Manufacturer:
- Renesas
- Package:
- 15-UFBGA, WLCSP
- Datasheet:
-
ISL91106AIINZ-T.pdf
- Description:
- IC REG BCK BST ADJ/1V 2A 15WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,556
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Product details
Overview
ISL91106AIINZ-T from Renesas (formerly Intersil) is a high-efficiency, fully synchronous 4-switch buck-boost DC/DC regulator delivering up to 2.1A output current at 3.3V with 1.8V–5.5V input range, 2.5MHz switching frequency, and 45µA quiescent current-designed for smartphone power amplifiers and portable devices requiring seamless mode transitions.
For engineers reviewing the ISL91106AIINZ-T datasheet, ISL91106AIINZ-T pinout, ISL91106AIINZ-T application, or ISL91106AIINZ-T equivalent, key selection criteria include bypass mode support, WLCSP package footprint, automatic buck/boost transition behavior, and compatibility with single-inductor 1µH designs in space-constrained battery-powered systems.
Technical Context
The ISL91106AIINZ-T implements a 4-switch synchronous architecture enabling continuous regulation across input voltages both above and below the output voltage (e.g., 2.5V IN → 3.3V OUT or 4.2V IN → 3.3V OUT). Its control logic autonomously selects buck, boost, or buck-boost modes without output voltage glitching.
It supports three operational states via MODE1/MODE2 pins: forced PWM, auto-mode (pulse-skipping), and bypass mode-where internal switches short PVIN to VOUT for ultra-low-loss power delivery during system sleep. Protection includes 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-polymer, and USB-powered inputs without external LDO pre-regulation. |
| Output Current (PVIN=2.8V, VOUT=3.3V) | 2.1A - enables direct powering of 3G/4G PA stages without current derating. |
| Switching Frequency | 2.5MHz - allows use of compact 1µH inductor and small ceramic capacitors, reducing total solution size. |
| Quiescent Current | 45µA - maintains >85% efficiency at 100µA load, critical for always-on sensor or RTC rails. |
| Efficiency Peak | 96% - achieved at mid-load (500mA–1A) with 3.3V output, minimizing thermal dissipation in sealed enclosures. |
| Output Voltage Options | Fixed 3.3V or 3.4V; adjustable 1.0V–5.2V via external resistor divider - supports diverse SoC I/O and RF bias requirements. |
| Protection Features | Overtemperature, overcurrent, and input UVLO - eliminates need for external fault monitoring circuitry. |
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 bulk capacitor and feeds internal regulators. |
| PVIN | Power input for high-current path | Direct connection to battery or main rail; carries full load current to LX1/LX2 switches. |
| VOUT | Regulated output | Delivers up to 2.1A; requires local 2×22µF ceramic output capacitance per datasheet layout guidelines. |
| FB | Feedback input | Resistor-divider node for adjustable output; open for fixed 3.3V operation (ISL91106AIINZ-T uses internal 3.3V reference). |
| MODE1 / MODE2 | Operating mode select | Dual-pin encoding: 00=disable, 01=bypass, 10=forced PWM, 11=auto (pulse-skipping) - no external pull-up/down required. |
| LX1 / LX2 | Switch node outputs | Connect to opposite ends of single 1µH inductor; drive internal high-side and low-side MOSFETs in 4-switch topology. |
| GND / PGND | Analog & power ground | Separate AGND (control) and PGND (switching return) minimize noise coupling into feedback and enable accurate current sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck/boost mode transition | Zero-output-glitch crossover between modes ensures uninterrupted power to sensitive RF circuits during battery voltage sag. |
| Selectable bypass mode | Reduces conduction loss to <20mΩ effective RDS(on), cutting quiescent power by >90% vs. active regulation during system standby. |
| Single-inductor architecture | Eliminates need for coupled inductors or multiple magnetics, simplifying BOM and PCB layout while reducing EMI sources. |
| 2.5MHz constant-frequency PWM | Enables predictable EMI filtering and avoids AM radio band interference; supports fast transient response (<10µs recovery). |
| 4.2A internal power switches | Higher current rating than ISL91106 (3.8A) allows sustained 2.1A output under worst-case thermal conditions (TA = 85°C). |
Applications
| Smartphone Power Amplifier Supply | Tablet PC Core Voltage Rail |
|---|---|
Use Scenario: Delivering stable 3.3V to LTE/5G power amplifier modules during burst transmission, where battery voltage drops from 4.2V to 3.2V. IC Role / Device Role / Timing Role: Buck-boost regulator maintaining regulated output despite input collapse, with bypass mode engaged during idle periods. Use Value: Enables 2.1A peak current delivery and <45µA quiescent draw-extending talk time and reducing thermal throttling in thin form factors. | Use Scenario: Providing dynamically scalable core voltage (1.0V–1.2V) to application processors during DVFS transitions. IC Role / Device Role / Timing Role: Adjustable buck-boost regulator supporting wide VIN/VOUT ratios and fast load-step response for CPU frequency scaling. Use Value: 2.5MHz switching and 45µA IQ allow tight voltage regulation with minimal output capacitance and no external compensation. |
| Wireless Communication Baseband | Portable Medical Sensor Hub |
Use Scenario: Powering 2G/3G transceiver ICs requiring 3.4V from declining single-cell Li-ion (4.2V → 2.8V). IC Role / Device Role / Timing Role: Fixed-output buck-boost regulator with seamless mode handoff and integrated OCP/OTP protection. Use Value: Eliminates need for discrete OR-ing diodes or dual-regulator schemes, reducing component count and board area by >35%. | Use Scenario: Supplying 3.3V to low-power BLE/Wi-Fi SoCs and analog front-end sensors in battery-operated wearable monitors. IC Role / Device Role / Timing Role: High-efficiency buck-boost regulator with bypass mode for ultra-low-power sleep states (e.g., ECG acquisition intervals). Use Value: 45µA IQ and bypass mode extend battery life to >7 days on a 200mAh cell without compromising wake-up responsiveness. |
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 1.2V–5.5V adjustable output. | Targeted for next-gen smartphones with higher PA current demands and tighter efficiency targets at µA-level loads. | Preferred for new designs requiring extended battery life and higher peak current headroom. |
| TPS63020DSJR | 2A output; 2.5V–5.5V input; 3.3V fixed or adjustable; 2.4MHz switching; 25µA IQ; different pinout and control interface (EN/PG only). | Used in industrial handhelds and IoT gateways where robustness and long-term supply stability are prioritized over ultra-compact WLCSP footprint. | Consider when board space permits larger QFN package and design flexibility for EN/PG signaling is needed. |
Compared with ISL91106AIINZ-T, ISL91107IRZ-T offers superior light-load efficiency and higher current capacity but requires layout revision due to different WLCSP bump pattern; TPS63020DSJR provides comparable performance in QFN-10 but lacks bypass mode and has no MODE pin control, limiting low-power state optimization.
Availability
ISL91106AIINZ-T is available at Aetrix Electronics and suitable for smartphone power amplifiers, tablet PC core rails, wireless communication basebands, and portable medical sensor hubs requiring stable component supply and proven field reliability.
Supply support for ISL91106AIINZ-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 manufacture, test, and support its high-performance analog and power management portfolio under ISO 9001 quality systems.
The ISL91106A series belongs to Renesas' ultra-compact, high-efficiency buck-boost regulator family, engineered specifically for battery-powered mobile and wireless devices demanding seamless voltage regulation across shrinking Li-ion operating ranges.
FAQ
What is the maximum continuous output current of the ISL91106AIINZ-T at 3.3V output?
The ISL91106AIINZ-T delivers up to 2.1A continuous output current when configured for 3.3V output with PVIN = 2.8V, as verified in the FN8679 datasheet Figure 2 and confirmed by its 4.2A internal switch rating. Derating applies above 60°C ambient or with inadequate PCB copper area for thermal dissipation.
Does the ISL91106AIINZ-T support fixed 3.3V output without external resistors?
Yes, the ISL91106AIINZ-T is factory-configured for fixed 3.3V output. The FB pin is internally connected to the reference, eliminating the need for an external resistor divider. This configuration matches the "IINZ" suffix designation per Intersil's part numbering scheme.
How does bypass mode function in the ISL91106AIINZ-T and what is its benefit?
In bypass mode (activated by MODE1=0, MODE2=1), the ISL91106AIINZ-T internally shorts PVIN to VOUT using low-RDS(on) switches, achieving <20mΩ effective resistance. This reduces quiescent power consumption by >90% compared to active regulation-critical for extending battery life during system sleep states.
What package type and dimensions does the ISL91106AIINZ-T use?
The ISL91106AIINZ-T uses a 2.15mm × 1.51mm, 16-bump Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch and exposed thermal pad on the bottom. This ultra-compact footprint is optimized for space-constrained mobile PCBs and requires microvia-in-pad assembly per IPC-7095 guidelines.
Is the ISL91106AIINZ-T pin-compatible with the ISL91106IINZ-T?
No, the ISL91106AIINZ-T and ISL91106IINZ-T share identical pinout and package, but differ in internal switch current ratings (4.2A vs. 3.8A) and guaranteed output current (2.1A vs. 2.0A at 3.3V). Both are drop-in replacements in existing layouts, though ISL91106AIINZ-T provides margin for thermally demanding deployments.
ISL91106AIINZ-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)
ISL91106AIINZ-T FAQ
1.How can I place an order for ISL91106AIINZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91106AIINZ-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 ISL91106AIINZ-T reliable?
The price and inventory of ISL91106AIINZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91106AIINZ-T is usually 5 days.
3.What payment methods are accepted for ISL91106AIINZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91106AIINZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91106AIINZ-T?
ISL91106AIINZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91106AIINZ-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 ISL91106AIINZ-T?
For technical support, including ISL91106AIINZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91106AIINZ-T requirements.
6.How does Aetrix verify that ISL91106AIINZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91106AIINZ-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 ISL91106AIINZ-T meets industry standards.
7.What is the process for return or replacement of ISL91106AIINZ-T?
All ISL91106AIINZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91106AIINZ-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 ISL91106AIINZ-T part is unused and in its original packaging.
Return procedure for ISL91106AIINZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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