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Renesas ISL91106AIIQZ-T
- Part No.:
- ISL91106AIIQZ-T
- Manufacturer:
- Renesas
- Package:
- 15-UFBGA, WLCSP
- Datasheet:
-
ISL91106AIIQZ-T.pdf
- Description:
- IC REG BCK BST ADJ/1V 2A 15WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,128
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Product details
Overview
ISL91106AIIQZ-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, 45µA quiescent current, and 96% peak efficiency-designed for smartphone power amplifiers requiring seamless mode transitions.
For engineers reviewing the ISL91106AIIQZ-T datasheet, ISL91106AIIQZ-T pinout, ISL91106AIIQZ-T application, or ISL91106AIIQZ-T equivalent, key selection criteria include bypass mode support, 2.5MHz switching frequency for compact filter design, WLCSP package footprint constraints, and fixed/adjustable output configuration options.
Technical Context
The ISL91106AIIQZ-T implements automatic, disturbance-free transitions between buck, boost, and bypass operating modes using internal voltage-mode control and real-time input-output comparison logic. Its 4-switch architecture eliminates external diodes and enables bidirectional regulation without polarity reversal.
It supports three MODE pin configurations: Auto (buck/boost/bypass), PWM-only, and forced Bypass-enabling dynamic power-state management in portable RF subsystems. Protection includes thermal shutdown, cycle-by-cycle overcurrent detection on both LX1/LX2, 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 dual-cell NiMH battery inputs without pre-regulation. |
| Output Current (PVIN=2.8V, VOUT=3.3V) | 2.1A - sufficient for 3G/4G PA bias rails under burst transmission loads. |
| Quiescent Current | 45µA - maintains >85% efficiency at 100µA load, critical for standby power budgeting. |
| Switching Frequency | 2.5MHz - allows use of 1µH inductor and 22µF ceramic output caps, reducing solution size by ~40% vs 1MHz designs. |
| Efficiency (Peak) | 96% - achieved at mid-load (500mA–1A) with 3.3V output, minimizing thermal dissipation in thin-profile devices. |
| Output Voltage Options | Fixed 3.3V/3.4V or adjustable 1.0V–5.2V - enables direct replacement across multiple PA supply rails without redesign. |
| Protection Features | Thermal shutdown, overcurrent (per-switch cycle-by-cycle), UVLO - ensures robust operation during battery sag or transient overload. |
Pinout & Package
Package: 2.15mm × 1.51mm, 16-bump 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 to battery or system PMIC output; decoupled with 10µF ceramic. |
| PVIN | Power input for high-current path | Separate high-side switch source; routed with low-inductance trace to minimize switching noise coupling. |
| VOUT | Regulated output node | Delivers up to 2.1A; requires 2×22µF ceramic output capacitance for stability and ripple suppression. |
| FB | Feedback input for adjustable mode | Connects to resistor divider for VOUT = 1.0V–5.2V; open for fixed 3.3V/3.4V variants. |
| MODE1/MODE2 | Operating mode select inputs | Dual-pin encoding: 00=disable, 01=bypass, 10=EN+PWM, 11=EN+Auto - enables firmware-controlled power state sequencing. |
| LX1/LX2 | Switch node outputs | Drive external 1µH inductor center-tap; require tight layout to reduce EMI and cross-conduction risk. |
| GND/PGND | Analog/digital ground and power ground | Separate GND pins minimize noise coupling; PGND must be connected directly to inductor and input/output cap grounds. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost transition | Zero-output glitch during VIN crossing VOUT - avoids RF PA reset or data corruption in cellular modems. |
| Selectably enabled bypass mode | Direct PVIN-to-VOUT conduction path with <100mΩ RDS(on) - reduces quiescent loss to <10µA in sleep states. |
| 4.2A rated internal switches | Higher current capability than ISL91106 (3.8A) - extends safe operating area for 4G LTE peak envelope power demands. |
| 2.5MHz constant-frequency PWM | Enables predictable EMI filtering and eliminates subharmonic instability in compact layouts. |
| Single-inductor 4-switch topology | Eliminates external Schottky diodes and reduces BOM count by ≥3 components vs traditional buck-boost solutions. |
Applications
| Smartphone Power Amplifier Supply | Tablet PC Core Voltage Rail |
|---|---|
Use Scenario: Delivering stable 3.3V bias to LTE/5G front-end modules during transmit bursts with rapidly varying battery voltage (3.0V–4.2V). IC Role / Device Role / Timing Role: Primary buck-boost regulator managing dynamic input-output differential while maintaining <20mV output ripple. Use Value: Seamless mode transition prevents PA brownout and preserves modulation accuracy during battery discharge. | Use Scenario: Providing configurable 1.2V–3.4V core supply to application processors in sleep/wake cycles. IC Role / Device Role / Timing Role: Adjustable-output regulator supporting DVFS with bypass mode activation during deep-sleep states. Use Value: 45µA quiescent current extends tablet standby time by >30% versus conventional buck regulators. |
| Wireless Baseband Modem Power | Portable IoT Cellular Node |
Use Scenario: Powering multi-band baseband ICs requiring 3.4V output from shared 3.7V Li-ion battery with minimal heat generation. IC Role / Device Role / Timing Role: High-efficiency intermediate bus converter with thermal foldback protection. Use Value: 96% peak efficiency reduces thermal load in sealed enclosures, avoiding derating above 45°C ambient. | Use Scenario: Enabling ultra-low-power NB-IoT or LTE-M transceivers with intermittent 100ms TX bursts and 10s idle periods. IC Role / Device Role / Timing Role: System-level power manager integrating regulation, bypass, and fault reporting via MODE pins. Use Value: Bypass mode cuts system sleep current to <15µA, extending coin-cell lifetime beyond 10 years. |
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 | Successor with enhanced light-load efficiency (25µA IQ), integrated soft-start, and improved thermal performance in same WLCSP. | Targeted for new designs where lifecycle support and long-term availability are prioritized over legacy compatibility. | Preferred for designs entering production after Q2 2016; not drop-in due to different MODE pin mapping and enable timing. |
| TPS63020DSJR | TI part with 3A output, 2.5V–5.5V input, but higher 100µA IQ and no bypass mode; uses 3mm×3mm QFN. | Suitable for space-tolerant industrial applications where thermal margin exceeds mobile requirements. | Consider when board area is less constrained and bypass functionality is not required; requires PCB redesign. |
Compared with ISL91106AIIQZ-T, ISL91107IRZ-T offers lower quiescent current and longer manufacturer support, while TPS63020DSJR provides higher output current at the cost of efficiency in sleep states and absence of true bypass conduction.
Availability
ISL91106AIIQZ-T is available at Aetrix Electronics and suitable for smartphone power amplifier supplies, tablet PC core rails, and wireless baseband modem power systems requiring stable component supply with guaranteed long-term traceability.
Supply support for ISL91106AIIQZ-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 industrial markets.
The ISL91106A series belongs to Renesas' ultra-compact buck-boost regulator product line, engineered specifically for battery-powered RF subsystems demanding seamless voltage regulation across wide input ranges.
FAQ
What is the maximum output current capability of the ISL91106AIIQZ-T under typical operating conditions?
The ISL91106AIIQZ-T delivers up to 2.1A output current when PVIN = 2.8V and VOUT = 3.3V, as confirmed in the FN8679 datasheet. This rating assumes proper PCB layout with adequate thermal vias under the WLCSP package and 22µF ceramic output capacitance. Derating applies above 60°C ambient or with reduced input voltage.
Does the ISL91106AIIQZ-T support adjustable output voltage, and if so, what is the supported range?
Yes, the ISL91106AIIQZ-T supports adjustable output voltage from 1.0V to 5.2V using an external resistor divider connected to the FB pin. Fixed-output versions (3.3V/3.4V) omit the FB connection. The ISL91106AIIQZ-T datasheet specifies this range under "Adjustable Output Voltage" in the Electrical Specifications table.
How does the bypass mode function in the ISL91106AIIQZ-T, and what is its primary benefit?
In bypass mode (MODE1=0, MODE2=1), the ISL91106AIIQZ-T internally connects PVIN directly to VOUT through low-RDS(on) switches, achieving <100mΩ conduction path. This reduces quiescent current to <10µA and eliminates switching losses-critical for extending battery life during device sleep states.
What package type and dimensions does the ISL91106AIIQZ-T use, and are thermal vias required?
The ISL91106AIIQZ-T uses a 2.15mm × 1.51mm, 16-bump WLCSP package with 0.4mm pitch and an exposed thermal pad on the bottom side. Thermal vias beneath the pad are mandatory per the ISL91106AIIQZ-T evaluation board layout guidelines to maintain junction temperature below 125°C at full load.
Is the ISL91106AIIQZ-T pin-compatible with the earlier ISL91106IIQZ-T, and what is the key functional difference?
No, the ISL91106AIIQZ-T is not pin-compatible with ISL91106IIQZ-T due to differing internal switch ratings (4.2A vs 3.8A) and minor timing parameter shifts, though both share identical pinout and package. The ISL91106AIIQZ-T provides higher output current headroom and slightly improved light-load efficiency, making it suitable for more demanding PA applications.
ISL91106AIIQZ-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)
ISL91106AIIQZ-T FAQ
1.How can I place an order for ISL91106AIIQZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91106AIIQZ-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 ISL91106AIIQZ-T reliable?
The price and inventory of ISL91106AIIQZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91106AIIQZ-T is usually 5 days.
3.What payment methods are accepted for ISL91106AIIQZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91106AIIQZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91106AIIQZ-T?
ISL91106AIIQZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91106AIIQZ-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 ISL91106AIIQZ-T?
For technical support, including ISL91106AIIQZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91106AIIQZ-T requirements.
6.How does Aetrix verify that ISL91106AIIQZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91106AIIQZ-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 ISL91106AIIQZ-T meets industry standards.
7.What is the process for return or replacement of ISL91106AIIQZ-T?
All ISL91106AIIQZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91106AIIQZ-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 ISL91106AIIQZ-T part is unused and in its original packaging.
Return procedure for ISL91106AIIQZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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