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Renesas ISL91107IRTNZ-T7A
- Part No.:
- ISL91107IRTNZ-T7A
- Manufacturer:
- Renesas
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
ISL91107IRTNZ-T7A.pdf
- Description:
- IC REG BUCK BOOST 3.3V 2A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,015
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Product details
Overview
ISL91107IRTNZ-T7A 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 compact power rails in portable battery-powered systems.
For engineers reviewing the ISL91107IRTNZ-T7A datasheet, ISL91107IRTNZ-T7A pinout, ISL91107IRTNZ-T7A application, or ISL91107IRTNZ-T7A equivalent, this device supports seamless buck-to-boost mode transitions, fixed 3.3V output, thermal shutdown, undervoltage lockout, and soft-discharge functionality-critical for smartphone, tablet, and optical module power design.
Technical Context
The ISL91107IRTNZ-T7A implements an integrated 4-switch buck-boost topology with automatic mode transition logic that avoids output disturbance during VIN-to-VOUT crossover. Its dual-input architecture separates PVIN (power path) from VIN (bias supply), enabling stable reference generation independent of high-current switching noise.
It features separate SGND and PGND pins, internal 0.8V feedback reference, programmable PFM/PWM operation via MODE pin, and built-in protection including overcurrent detection via FB monitoring, thermal shutdown at 150°C with 30°C hysteresis, and UVLO with 1.75V rising threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, Li-poly, or multi-cell alkaline/battery inputs without pre-regulation. |
| Output Current | Up to 2A at VOUT = 3.3V, PVIN = 2.8V - sufficient for application processors, RF transceivers, and display bias rails. |
| Switching Frequency | 2.5MHz (±10%) - enables use of 1µH inductors and small ceramic capacitors, minimizing solution footprint. |
| No-Load Quiescent Current | 45µA - extends battery runtime in standby/sleep modes of always-on subsystems. |
| Output Voltage Accuracy | ±2% in PWM mode, ±3% in PFM mode - ensures stable core voltage under dynamic load and light-load conditions. |
| Thermal Shutdown Threshold | 150°C with 30°C hysteresis - protects against sustained overload or poor PCB thermal design while enabling safe auto-recovery. |
| Soft-Discharge Resistance | 35Ω typical between VOUT and SGND when disabled - prevents floating output and enables controlled discharge without external circuitry. |
Pinout & Package
ISL91107IRTNZ-T7A is housed in a 3mm × 4mm, 20-lead TQFN package (RoHS-compliant, JEDEC MO-220VEGD-NJI, thermal pad exposed on underside). The package uses e3 matte tin termination and supports Pb-free reflow per IPC/JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (Pins 7–10) | Power input rail | High-current input path (1.8V–5.5V); requires local 22µF ceramic capacitor to PGND for ripple suppression. |
| VIN (Pin 12) | Bias supply input | Low-noise input for internal reference and control circuitry; decoupled separately from PVIN to avoid switching noise coupling. |
| LX1 (Pins 5–6) | Inductor connection (input side) | Connects to one end of the single external inductor; carries high di/dt buck-mode current. |
| LX2 (Pins 1–2) | Inductor connection (output side) | Connects to opposite end of inductor; carries high di/dt boost-mode current and reverse recovery stress. |
| VOUT (Pins 17–20) | Regulated output | Delivers up to 2A at fixed 3.3V; requires 2×22µF X5R ceramic output capacitors for stability and transient response. |
| FB (Pin 16) | Feedback input | Monitors output via internal 0.8V reference; not used in fixed-output ISL91107IRTNZ-T7A but tied internally to set 3.3V. |
| EN (Pin 13) | Enable control | Active-high logic input; drives HIGH to enable regulation, LOW to enter shutdown (<0.6µA IQ) with soft-discharge activation. |
| MODE (Pin 14) | Operation mode select | HIGH = auto PFM/PWM transition; LOW = forced PWM - used to eliminate low-frequency PFM ripple in noise-sensitive circuits. |
| PGND (Pins 3–4) | Power ground | High-current return path for LX1/LX2 switches and PVIN/VOUT capacitors; must be low-inductance plane connected to thermal pad. |
| SGND (Pin 15) | Analog ground | Low-noise reference for error amplifier, reference, and FB; isolated from PGND to prevent switching noise injection into regulation loop. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck-boost mode transition | Zero-output-disturbance crossover when VIN approaches VOUT - eliminates voltage dip or overshoot during battery discharge. |
| 4-switch synchronous architecture | Eliminates external diodes and reduces conduction loss; achieves up to 96% peak efficiency across 1mA–2A load range. |
| Selectably forced PWM mode | Enables deterministic switching frequency and reduced output ripple in EMI-critical applications like RF front-ends or ADC supplies. |
| Integrated soft-discharge | 35Ω internal pull-down activated on EN deassertion - prevents uncontrolled floating output and simplifies system power sequencing. |
| Separate PVIN/VIN and PGND/SGND | Prevents switching noise from corrupting reference and feedback paths - improves load/line regulation accuracy and stability margin. |
Applications
| Smartphone Power Management | Tablet PC Core Rail |
|---|---|
Use Scenario: Regulating main SoC I/O or memory interface voltage from declining single-cell Li-ion battery (3.6V → 2.8V). IC Role / Device Role / Timing Role: Primary buck-boost regulator maintaining stable 3.3V rail despite input voltage crossing output level. Use Value: Enables uninterrupted operation through full battery discharge curve without requiring intermediate LDOs or multiple converters. |
Use Scenario: Supplying 3.3V to display interface, touch controller, or camera module in space-constrained tablet designs. IC Role / Device Role / Timing Role: Compact, high-efficiency point-of-load regulator with minimal external components and 2.5MHz operation. Use Value: Reduces total solution size by >40% vs. discrete buck+boost solutions while meeting stringent light-load efficiency targets. |
| Optical Module Bias Supply | Wireless Communication Transceiver |
Use Scenario: Providing clean, regulated 3.3V to SFP+/QSFP transceivers in networking equipment where input varies with upstream DC-DC stage. IC Role / Device Role / Timing Role: Isolated, low-noise buck-boost converter with dedicated SGND and soft-start to minimize startup transients. Use Value: Meets strict EMI requirements for optical links and avoids data corruption caused by supply droop during hot-plug events. |
Use Scenario: Powering 3.3V RF front-end ICs (PA drivers, LNAs) in Bluetooth/Wi-Fi modules operating from 3.3V or 3.6V battery sources. IC Role / Device Role / Timing Role: High-efficiency, fast-transient-response regulator supporting burst-mode transmission with minimal voltage sag. Use Value: Delivers <100mV undershoot during 0A→2A load steps and recovers within 10µs - preserving RF signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | 2.5V–5.5V input, 2A output, 2.4MHz switching, but uses shared VIN/PVIN and lacks separate SGND - higher noise sensitivity. | Less suitable for precision analog rails; requires additional filtering for RF/ADC supplies. | Choose if board area is tighter and noise immunity is secondary to cost. |
| MAX77818EWJ+T | 1.8V–5.5V input, 3A output, 2MHz, integrates I²C interface and dynamic voltage scaling - larger 28-pin WLP package. | Preferred for programmable multi-rail systems; over-specified for fixed 3.3V-only use cases. | Choose only when digital control, telemetry, or multiple output voltages are required. |
Compared with TPS63020DSJR and MAX77818EWJ+T, the ISL91107IRTNZ-T7A offers superior noise isolation via dedicated SGND/PGND, lower quiescent current (45µA vs. 80µA), and simpler fixed-output implementation - making it optimal for cost-sensitive, noise-critical, single-rail portable applications.
Availability
ISL91107IRTNZ-T7A is available at Aetrix Electronics and suitable for smartphone power management, tablet PC core rails, optical module bias supplies, and wireless communication transceiver applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL91107IRTNZ-T7A 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) is a global leader in microcontrollers, analog, power management, and SoC solutions, serving automotive, industrial, infrastructure, and consumer markets with high-reliability silicon.
The ISL91107IRTNZ-T7A belongs to Renesas' high-efficiency buck-boost regulator product line, engineered specifically for space-constrained, battery-powered portable electronics demanding seamless VIN-to-VOUT crossover and ultra-low quiescent power.
FAQ
What is the output voltage configuration of ISL91107IRTNZ-T7A?
The ISL91107IRTNZ-T7A is a fixed-output variant configured for 3.3V regulation. It does not require external feedback resistors - the FB pin is internally connected to set the output. This simplifies layout and eliminates resistor tolerance errors, making ISL91107IRTNZ-T7A ideal for production designs where consistent 3.3V rail performance is required without calibration.
Does ISL91107IRTNZ-T7A support forced PWM mode?
Yes, ISL91107IRTNZ-T7A supports forced PWM mode via the MODE pin. When MODE is driven LOW, the device operates exclusively in PWM mode regardless of load current - eliminating PFM frequency variation and associated output voltage ripple. This is essential for noise-sensitive applications such as RF transceivers or high-speed ADC/DAC supplies where spectral purity matters.
How does ISL91107IRTNZ-T7A handle input voltage crossing the output voltage?
ISL91107IRTNZ-T7A automatically and seamlessly transitions between buck and boost modes when input voltage crosses the 3.3V output level - without output disturbance, dropout, or control-loop instability. This behavior is enabled by its proprietary 4-switch architecture and real-time mode arbitration logic, ensuring continuous regulation across the full 1.8V–5.5V input range.
What thermal protection features does ISL91107IRTNZ-T7A include?
ISL91107IRTNZ-T7A incorporates thermal shutdown at +150°C (typical) with +30°C hysteresis. When junction temperature exceeds the threshold, the device disables all switching and enters thermal shutdown. Once die temperature falls to +120°C, ISL91107IRTNZ-T7A automatically resumes operation after executing its full soft-start sequence - preventing latch-up and enabling robust field reliability.
Can ISL91107IRTNZ-T7A be used with a single inductor?
Yes, ISL91107IRTNZ-T7A requires only one external inductor - a key advantage over traditional buck-boost implementations. A 1µH shielded ferrite inductor rated for ≥4.1A saturation current is recommended. This single-inductor configuration reduces BOM count, PCB area, and electromagnetic interference compared to coupled-inductor or dual-converter approaches.
ISL91107IRTNZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TQFN (3x4)
ISL91107IRTNZ-T7A FAQ
1.How can I place an order for ISL91107IRTNZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91107IRTNZ-T7A 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 ISL91107IRTNZ-T7A reliable?
The price and inventory of ISL91107IRTNZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91107IRTNZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL91107IRTNZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91107IRTNZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91107IRTNZ-T7A?
ISL91107IRTNZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91107IRTNZ-T7A 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 ISL91107IRTNZ-T7A?
For technical support, including ISL91107IRTNZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91107IRTNZ-T7A requirements.
6.How does Aetrix verify that ISL91107IRTNZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL91107IRTNZ-T7A 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 ISL91107IRTNZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL91107IRTNZ-T7A?
All ISL91107IRTNZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL91107IRTNZ-T7A, 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 ISL91107IRTNZ-T7A part is unused and in its original packaging.
Return procedure for ISL91107IRTNZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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