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Renesas ISL91106AIIAZ-T
- Part No.:
- ISL91106AIIAZ-T
- Manufacturer:
- Renesas
- Package:
- 15-UFBGA, WLCSP
- Datasheet:
-
ISL91106AIIAZ-T.pdf
- Description:
- IC REG BCK BST ADJ/1V 2A 15WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,884
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Product details
Overview
ISL91106AIIAZ-T from Renesas (formerly Intersil) is a 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 requiring seamless mode transition and bypass operation.
For engineers reviewing the ISL91106AIIAZ-T datasheet, ISL91106AIIAZ-T pinout, ISL91106AIIAZ-T application, or ISL91106AIIAZ-T equivalent, key selection criteria include verified 4.2A internal switch rating, WLCSP-16 package compatibility, fixed/adjustable output support (1V–5.2V), bypass mode enablement, and thermal/overcurrent protection behavior under dynamic load transitions.
Technical Context
The ISL91106AIIAZ-T implements automatic, disturbance-free transitions between buck, boost, and pass-through modes using real-time voltage comparison and gate drive sequencing-no external control logic required. Its 4-switch architecture eliminates body-diode conduction losses and enables bidirectional regulation without polarity reversal.
It supports three operating modes via MODE1/MODE2 pins: forced PWM (for noise-sensitive systems), auto-mode (for efficiency optimization), and bypass mode (direct PVIN-to-VOUT path with <100mΩ RDS(on)). Undervoltage lockout, overtemperature shutdown, and cycle-by-cycle overcurrent protection are integrated and active across all modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, USB VBUS, and multi-rail battery systems without pre-regulation |
| Output Current (3.3V) | 2.1A - validated at PVIN = 2.8V, enabling full load in low-VIN smartphone PA bias rails |
| Switch Rating | 4.2A - peak current capability of internal MOSFETs, allowing robust transient response and margin for 2G/3G/4G PA burst loads |
| Quiescent Current | 45µA - enables >90% efficiency at 100µA load, critical for always-on modem sleep states |
| Switching Frequency | 2.5MHz - permits use of 1µH inductor and compact 22µF ceramic output caps, reducing solution footprint by ~40% vs. 1MHz designs |
| Output Voltage Range | Fixed 3.3V/3.4V or adjustable 1.0V–5.2V - supports diverse RF PA supply requirements and system-level rail sharing |
| Package | WLCSP-16 (2.15mm × 1.51mm, 0.4mm pitch) - ultra-low profile for thin mobile PCBs with minimal thermal resistance to PCB |
Pinout & Package
ISL91106AIIAZ-T uses a 16-ball Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch, optimized for thermal dissipation through bottom-side solder connections to PCB copper planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN | Main power input | Accepts 1.8V–5.5V; supplies internal LDOs and high-side switches; requires local 10µF ceramic decoupling |
| VIN | Bias supply input | Provides gate drive and control circuitry power; must be ≥PVIN – 0.3V; tied to PVIN if unused |
| VOUT | Regulated output | Delivers up to 2.1A; connects to output capacitor bank and load; feedback sensed at FB pin |
| FB | Feedback input | Senses output voltage divider ratio; open for fixed 3.3V/3.4V operation; sets adjustable output per R1/R2 equation |
| MODE1, MODE2 | Operating mode select | Digital inputs defining bypass, PWM, or auto-mode; require defined logic levels (0/0 = disable, 0/1 = bypass, etc.) |
| LX1, LX2 | Switch node outputs | Connect to external 1µH inductor; carry high-frequency AC current; require tight layout and ground stitching |
| GND / PGND | Analog & power ground | Separate AGND (control) and PGND (switching) pins minimize noise coupling into feedback path |
| EN | Enable input | Active-high logic control; internal pull-down; allows system-level power sequencing and deep-sleep entry |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Zero-output-voltage glitch during VIN crossing VOUT; eliminates need for external supervisors or sequencing controllers |
| Selectable bypass mode | Direct conduction path with <100mΩ effective resistance reduces dropout and power loss during system sleep |
| 2.5MHz constant-frequency operation | Enables use of small 1µH shielded inductors and avoids AM radio band interference in handheld RF layouts |
| Integrated protection suite | Auto-recoverable overcurrent, thermal shutdown with hysteresis, and UVLO prevent latch-up and field failures |
| Ultra-low IQ (45µA) | Maintains >85% efficiency at 50µA load-critical for LTE/Wi-Fi coexistence and modem standby compliance |
Applications
| Smartphone Power Amplifier Supply | Tablet PC Core Voltage Rail |
|---|---|
Use Scenario: Delivering dynamically scaled 3.3V/3.4V bias to 4G LTE power amplifiers during transmit bursts and deep-sleep intervals. IC Role / Device Role / Timing Role: Primary buck-boost regulator providing regulated PA supply with bypass mode enabled during RX/idle states. Use Value: Achieves >94% efficiency at 200mA and <100mV output droop during 2A burst loads-meeting TRP/TRS envelope requirements. | Use Scenario: Generating stable 3.3V core rail for application processors and display interfaces in dual-battery tablet platforms. IC Role / Device Role / Timing Role: Standalone wide-input regulator supporting battery voltage sag (2.8V) and USB charging (5V) without rail collapse. Use Value: Eliminates need for pre-boost stage; maintains regulation across 1.8V–5.5V input with <2% line/load regulation error. |
| Wireless Modem Sleep Mode Power | 2G/3G RF Front-End Bias |
Use Scenario: Supplying always-on 1.8V logic rail to cellular modems during eDRX and PSM (Power Saving Mode) cycles. IC Role / Device Role / Timing Role: Low-IQ buck-boost converter operating in bypass or auto-mode to minimize quiescent consumption. Use Value: Delivers 45µA IQ and <10µA shutdown current-enabling >10-day battery life in IoT-class cellular modules. | Use Scenario: Providing programmable 2.5V–4.2V bias to legacy 2G/3G power amplifiers with varying VCC requirements. IC Role / Device Role / Timing Role: Adjustable-output buck-boost regulator configured via external resistor divider for multi-band PA support. Use Value: Supports 1.0V–5.2V output range with ±1% accuracy-replacing multiple fixed-output regulators in multi-PA front-end designs. |
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; 3.2MHz switching; improved light-load efficiency (25µA IQ); same WLCSP-16 package | Targeted for next-gen 5G mmWave PA bias where higher peak current and tighter ripple specs apply | Preferred for new designs requiring extended output current headroom and lower EMI |
| TPS63020DSJR | 2A output; 2.5MHz; 25µA IQ; 2.5V–5.5V input; QFN-10 package (3mm × 3mm) | Requires external compensation; lacks bypass mode; larger footprint but offers wider VIN and better thermal derating | Consider when board space allows larger package and bypass functionality is not required |
Compared with ISL91106AIIAZ-T, ISL91107IRZ-T provides higher current and lower IQ in identical packaging-ideal for design refreshes-while TPS63020DSJR trades bypass capability and size for broader input range and simplified external component count in less space-constrained applications.
Availability
ISL91106AIIAZ-T is available at Aetrix Electronics and suitable for smartphone power amplifier supplies, tablet PC core rails, and wireless modem sleep-mode power requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant WLCSP packaging.
Supply support for ISL91106AIIAZ-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 its legacy of high-performance analog and power management ICs for mobile, industrial, and automotive markets.
The ISL91106AIIAZ-T belongs to Renesas' high-efficiency buck-boost regulator family, engineered specifically for space-constrained, battery-powered RF systems demanding seamless mode transitions and ultra-low quiescent power.
FAQ
What is the maximum continuous output current of the ISL91106AIIAZ-T at 3.3V output?
The ISL91106AIIAZ-T delivers up to 2.1A continuous output current when configured for 3.3V output with PVIN = 2.8V, as validated in the official datasheet FN8679. This rating assumes proper PCB thermal design with ≥4cm² of 1oz copper on inner layers and ambient temperature ≤40°C. Derating applies above 60°C ambient or with reduced copper area.
Does the ISL91106AIIAZ-T support adjustable output voltage, and what is the supported range?
Yes, the ISL91106AIIAZ-T supports adjustable output voltage from 1.0V to 5.2V using an external resistor divider connected to the FB pin. Fixed 3.3V and 3.4V versions are also available. The feedback reference voltage is 0.6V with ±1% tolerance, enabling precise rail generation for RF power amplifiers and mixed-signal subsystems.
How does bypass mode operate in the ISL91106AIIAZ-T, and what is its typical resistance?
In bypass mode (MODE1=0, MODE2=1), the ISL91106AIIAZ-T enables a low-impedance path from PVIN to VOUT using internal FETs, achieving <100mΩ total resistance. This minimizes dropout and power loss during system sleep, reducing quiescent consumption to <10µA while maintaining regulated output voltage within ±2%.
What package type and dimensions does the ISL91106AIIAZ-T use, and is it RoHS-compliant?
The ISL91106AIIAZ-T uses a 16-ball Wafer-Level Chip-Scale Package (WLCSP) measuring 2.15mm × 1.51mm with 0.4mm ball pitch. It is lead-free and RoHS-compliant per J-STD-609 Category 3, qualified to MSL Level 3, and compatible with standard Pb-free reflow profiles.
Is the ISL91106AIIAZ-T pin-compatible with the ISL91106IINZ or ISL91106IIQZ?
Yes, the ISL91106AIIAZ-T shares identical pinout, package footprint, and electrical interface with ISL91106IINZ and ISL91106IIQZ. All three are WLCSP-16 devices with matching pin assignments and thermal pad configuration-enabling drop-in replacement where higher 4.2A switch rating and 2.1A output capability are required.
ISL91106AIIAZ-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)
ISL91106AIIAZ-T FAQ
1.How can I place an order for ISL91106AIIAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91106AIIAZ-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 ISL91106AIIAZ-T reliable?
The price and inventory of ISL91106AIIAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91106AIIAZ-T is usually 5 days.
3.What payment methods are accepted for ISL91106AIIAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91106AIIAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91106AIIAZ-T?
ISL91106AIIAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91106AIIAZ-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 ISL91106AIIAZ-T?
For technical support, including ISL91106AIIAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91106AIIAZ-T requirements.
6.How does Aetrix verify that ISL91106AIIAZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91106AIIAZ-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 ISL91106AIIAZ-T meets industry standards.
7.What is the process for return or replacement of ISL91106AIIAZ-T?
All ISL91106AIIAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91106AIIAZ-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 ISL91106AIIAZ-T part is unused and in its original packaging.
Return procedure for ISL91106AIIAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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