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Renesas ISL91107IRTNZ-T
- Part No.:
- ISL91107IRTNZ-T
- Manufacturer:
- Renesas
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
ISL91107IRTNZ-T.pdf
- Description:
- IC REG BUCK BOOST 3.3V 2A 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,676
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Product details
Overview
ISL91107IRTNZ-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 fixed output, operating from 1.8V–5.5V input, with 2.5MHz switching frequency and 45µA no-load quiescent current. It enables compact power delivery in space-constrained portable electronics where input voltage may dip below or rise above the regulated rail.
For engineers reviewing the ISL91107IRTNZ-T datasheet, ISL91107IRTNZ-T pinout, ISL91107IRTNZ-T application, or ISL91107IRTNZ-T equivalent, key selection criteria include its automatic buck/boost mode transition, 3×4mm TQFN-20 package footprint, integrated 4.1A switches, thermal shutdown at 150°C, and support for both forced PWM and auto PFM operation.
Technical Context
The ISL91107IRTNZ-T implements a true 4-switch buck-boost topology with independent gate drivers and anti-shoot-through logic, enabling seamless transitions between buck and boost modes without output disturbance. Its dual-input architecture separates PVIN (power path) from VIN (bias supply), and uses dedicated SGND and PGND pins to isolate analog reference integrity from high di/dt switching currents.
Control architecture integrates a PWM oscillator, error amplifier, voltage clamp (5.35–5.85V), soft-start (1–2ms ramp), and soft-discharge (35Ω internal pull-down). Protection includes overcurrent detection via FB monitoring, undervoltage lockout (1.75V rising threshold), and thermal shutdown with 30°C hysteresis.
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-backed systems without pre-regulation. |
| Output Voltage | Fixed 3.3V - eliminates external feedback resistors, simplifying layout and reducing BOM count for standard I/O rail generation. |
| Max Output Current | 2A at PVIN=2.8V/VOUT=3.3V - sufficient for powering application processors, PMICs, or RF front-ends in smartphones and tablets. |
| Switching Frequency | 2.5MHz (±10%) - enables use of 1µH inductors and small ceramic capacitors, minimizing solution size and EMI filter requirements. |
| Quiescent Current | 45µA in PFM mode - extends battery runtime during standby or light-load states in always-on subsystems. |
| Efficiency Peak | 96% - achieved under mid-load conditions, reducing thermal stress and enabling higher power density in thermally constrained enclosures. |
| Thermal Shutdown | 150°C with 30°C hysteresis - ensures safe recovery after overload or ambient temperature excursions without manual reset. |
Pinout & Package
ISL91107IRTNZ-T is housed in a 3mm × 4mm, 20-lead Thin Quad Flat No-lead (TQFN) package with exposed thermal pad (PKG DWG L20.3x4A), RoHS-compliant and MSL3 rated. The package supports high thermal conductivity via direct connection of the EPAD to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (Pins 7–10) | Power input supply | High-current input path for DC/DC conversion stage; requires local 22µF ceramic capacitor to PGND. |
| VIN (Pin 12) | Bias supply input | Provides stable operating voltage for internal references and control circuitry; decoupled separately from PVIN. |
| LX1 (Pins 5–6) | Inductor connection (input side) | Connects to one end of the external 1µH 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 bidirectional switching current. |
| VOUT (Pins 17–20) | Regulated output | Delivers 3.3V output; requires two parallel 22µF X5R ceramic capacitors to PGND for low-ESR filtering. |
| FB (Pin 16) | Voltage feedback | Monitors output via internal 0.8V reference; unused in fixed-output ISL91107IRTNZ-T but internally tied to VOUT. |
| EN (Pin 13) | Enable control | Active-high logic input; drives HIGH to enable regulation, LOW to enter shutdown (0.05µA IQ). |
| MODE (Pin 14) | Operating mode select | HIGH = auto PFM for light-load efficiency; LOW = forced PWM for constant frequency and predictable EMI. |
| PGND (Pins 3–4) | Power ground | High-current return path for LX1/LX2 switching nodes and PVIN/VOUT capacitors; must be low-inductance plane. |
| SGND (Pin 15) | Analog ground | Reference ground for error amp, reference, and FB; isolated from PGND to prevent noise coupling into regulation loop. |
| EPAD | Thermal pad | Exposed metal pad on underside; must be soldered to solid PGND copper area for thermal dissipation (θJC = 5.5°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Automatic buck/boost mode transition | Zero-output-disturbance crossover when VIN approaches VOUT - maintains regulation during battery discharge or dynamic load changes without external intervention. |
| 4-switch synchronous architecture | Eliminates external diodes and reduces conduction losses - enables 96% peak efficiency and supports 4.1A internal switch current rating. |
| Selectable PFM/PWM operation | Optimizes efficiency across full load range: PFM extends battery life at µA–mA loads; forced PWM ensures stable EMI profile at >300mA. |
| Integrated soft-discharge | 35Ω internal pull-down between VOUT and SGND upon EN deactivation - prevents floating output and enables controlled system power-down sequencing. |
| Fully protected operation | Combines short-circuit protection (via FB monitoring), thermal shutdown (150°C), UVLO (1.75V), and anti-shoot-through logic - reduces need for external fault management circuitry. |
Applications
| Smartphone Power Management | Tablet PC Core Rail Generation |
|---|---|
Use Scenario: Regulating main 3.3V I/O rail from a single-cell Li-ion battery (2.8V–4.2V) while maintaining stable voltage during RF transmit bursts and display backlight dimming. IC Role / Device Role / Timing Role: Primary buck-boost regulator providing clean, tightly regulated 3.3V output with <±2% accuracy and <50mV load transient deviation. Use Value: Enables direct battery-to-rail conversion without intermediate LDOs, improving overall system efficiency by up to 15% versus cascaded architectures. | Use Scenario: Supplying 3.3V to USB PHY, SD card interface, and touch controller in a 7-inch tablet with aggressive thickness constraints. IC Role / Device Role / Timing Role: Compact, high-frequency DC/DC converter delivering 2A continuous current in a 3×4mm footprint with minimal external components. Use Value: Reduces total power solution area by >40% compared to discrete buck+boost solutions, freeing PCB space for antenna or battery expansion. |
| Wireless Communication Module | Optical Transceiver Power |
Use Scenario: Powering LTE/Wi-Fi combo modules in portable hotspots where input voltage varies widely due to USB-C PD negotiation or battery aging. IC Role / Device Role / Timing Role: Input-flexible regulator maintaining 3.3V output across 1.8V–5.5V input range with seamless mode transition and <10µs response to line transients. Use Value: Eliminates need for separate buck and boost ICs, simplifying design validation and reducing component count by 30%. | Use Scenario: Delivering stable 3.3V to SFP+ optical transceivers in networking equipment subject to hot-swap events and rapid input voltage collapse. IC Role / Device Role / Timing Role: High-reliability buck-boost regulator with integrated soft-start (2ms buck, 3ms boost), thermal shutdown, and reverse-current blocking. Use Value: Prevents output voltage droop during hot-insertion and avoids damage from backfeed during module removal. |
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–6V input, 0.9V–5.5V adjustable output, 3A max, 2.4MHz switching, 25µA IQ - slightly lower quiescent current but no fixed-3.3V variant. | Requires external resistor divider for 3.3V; lacks integrated soft-discharge and has different MODE pin behavior. | Choose for higher output current headroom or adjustable output; verify feedback network layout and transient response against ISL91107IRTNZ-T. |
| MAX77827AEWA+T | 2.5V–5.5V input, fixed 3.3V output, 2A max, 2.2MHz switching, 30µA IQ - lower IQ but narrower input range and no MODE pin for PFM/PWM selection. | Single-input architecture (no PVIN/VIN separation); lacks automatic buck/boost transition logic and soft-discharge function. | Prefer for ultra-low-IQ designs with stable input sources; avoid where input dips below 2.5V or seamless mode transition is critical. |
Compared with TPS63020DSJR and MAX77827AEWA+T, the ISL91107IRTNZ-T uniquely combines fixed 3.3V output, dual-input architecture (PVIN/VIN), integrated soft-discharge, and guaranteed seamless buck/boost transition - making it optimal for battery-powered devices requiring minimal external components and robust dynamic performance.
Availability
ISL91107IRTNZ-T is available at Aetrix Electronics and suitable for smartphone power management, tablet PC core rail generation, and wireless communication module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL91107IRTNZ-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) is a global semiconductor leader specializing in microcontrollers, analog power management, and mixed-signal solutions for industrial, automotive, and consumer markets.
The ISL91107IRTNZ-T belongs to Renesas' high-efficiency buck-boost regulator product line, designed specifically for portable electronics requiring wide-input, fixed-output power conversion with minimal footprint and maximum light-load efficiency.
FAQ
What is the recommended inductor value and saturation current for ISL91107IRTNZ-T?
The ISL91107IRTNZ-T requires a 1µH shielded or toroidal ferrite inductor rated for ≥4.1A saturation current. Recommended part numbers include Cyntec PIFE32251B-1R0MS and TOKO DFE322512C. Low DCR (<30mΩ) is essential to maintain >95% efficiency at 2A load. Inductor placement must minimize loop area with LX1/LX2 and PGND to reduce EMI.
Does ISL91107IRTNZ-T support automatic mode transition between buck and boost?
Yes, the ISL91107IRTNZ-T automatically and seamlessly transitions between buck and boost modes without output voltage disturbance or external control. This occurs when input voltage crosses the regulated 3.3V output - for example, during battery discharge from 4.2V to 2.8V - and is enabled by its proprietary 4-switch control architecture and real-time FB monitoring.
What is the purpose of the separate PVIN and VIN pins on ISL91107IRTNZ-T?
PVIN supplies high-current power to the switching MOSFETs, while VIN provides a clean, low-noise bias voltage for internal references and control circuitry. This separation prevents switching noise from corrupting the voltage reference and improves regulation accuracy and stability - especially critical in noise-sensitive applications like RF modules and optical transceivers.
How does the soft-discharge feature work on ISL91107IRTNZ-T?
When EN is driven LOW, the ISL91107IRTNZ-T activates an internal 35Ω resistor between VOUT and SGND, discharging the output capacitor in a controlled manner. This prevents floating outputs, avoids unintended wake-up of downstream circuitry, and supports safe power-down sequencing in multi-rail systems - eliminating need for external discharge FETs or resistors.
What are the thermal design requirements for ISL91107IRTNZ-T in a 2A application?
For continuous 2A operation, the ISL91107IRTNZ-T requires the exposed thermal pad (EPAD) to be soldered to a minimum 100mm² solid PGND copper area with ≥4 thermal vias (0.3mm diameter) connecting to inner/ground planes. With this layout, junction temperature remains ≤110°C at +85°C ambient, well below the 150°C thermal shutdown threshold. Thermal resistance is θJA = 41°C/W and θJC = 5.5°C/W.
ISL91107IRTNZ-T 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-T FAQ
1.How can I place an order for ISL91107IRTNZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91107IRTNZ-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 ISL91107IRTNZ-T reliable?
The price and inventory of ISL91107IRTNZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91107IRTNZ-T is usually 5 days.
3.What payment methods are accepted for ISL91107IRTNZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91107IRTNZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91107IRTNZ-T?
ISL91107IRTNZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91107IRTNZ-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 ISL91107IRTNZ-T?
For technical support, including ISL91107IRTNZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91107IRTNZ-T requirements.
6.How does Aetrix verify that ISL91107IRTNZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91107IRTNZ-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 ISL91107IRTNZ-T meets industry standards.
7.What is the process for return or replacement of ISL91107IRTNZ-T?
All ISL91107IRTNZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91107IRTNZ-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 ISL91107IRTNZ-T part is unused and in its original packaging.
Return procedure for ISL91107IRTNZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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