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Renesas ISL91133IIOZ-T
- Part No.:
- ISL91133IIOZ-T
- Manufacturer:
- Renesas
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
ISL91133IIOZ-T.pdf
- Description:
- IC REG BOOST PROG 2.3A 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,958
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Product details
Overview
ISL91133IIOZ-T from Renesas Electronics is a high-efficiency 2.3A synchronous boost regulator with integrated input-to-output bypass functionality, designed for single-cell Li-ion/Li-polymer battery systems. It delivers up to 2.3A at VOUT = 3.7V from VIN = 2.5V, features 38mΩ bypass MOSFET, 2.5MHz switching frequency, and operates across -40°C to +85°C ambient temperature.
For engineers reviewing the ISL91133IIOZ-T datasheet, ISL91133IIOZ-T pinout, ISL91133IIOZ-T application, or ISL91133IIOZ-T equivalent, this page provides verified technical context, exact pin functions, fixed 3.7V/3.77V dual-output capability, Bypass mode control logic, and validated alternative options for portable power rail design.
Technical Context
The ISL91133IIOZ-T implements valley-current-mode PWM control with internal N- and P-channel MOSFETs (rDS(ON) = 45mΩ/40mΩ), enabling synchronous boost conversion up to 2.5MHz. Its dual-mode operation-PWM above 300mA load and PFM below-optimizes light-load efficiency while maintaining tight regulation.
Bypass functionality is implemented via a dedicated 38mΩ P-channel MOSFET (Q3), activated either by external BYPS pin command (Forced Bypass) or automatically when VIN exceeds VOUT by 1.5% (Auto Bypass). The device uses separate PGND and GND pins to isolate high-switching-current paths from analog reference circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.7V (LO) / 3.77V (HI) selectable via VSEL pin; no external feedback required |
| Max Output Current | 2.3A DC at VIN = 2.5V, VOUT = 3.7V; supports 2.5A burst for <600µs |
| Quiescent Current | 108µA in Boost mode; 45µA in Forced Bypass mode-enables ultra-low standby power |
| Switching Frequency | 2.5MHz typical-permits use of compact 0.47µH inductor and small ceramic capacitors |
| Bypass RDS(ON) | 38mΩ-enables <100mV dropout at 1A, critical for battery-to-rail efficiency near VIN ≈ VOUT |
| Protection Features | Overcurrent (hiccup mode), thermal shutdown (150°C), undervoltage lockout (2.35V), and load disconnect on disable |
| Operating Temp Range | -40°C to +85°C-qualified for industrial and mobile end-equipment environments |
Pinout & Package
ISL91133IIOZ-T is housed in a 16-ball, 0.4mm pitch, 1.78mm × 1.78mm WLCSP package (PKG DWG #W4x4.16E), RoHS-compliant with SnAgCu solder balls and MSL3 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | EN | Active-high enable input; drives HIGH to activate regulator; internal 1.5MΩ pull-down |
| A2 | PG | Open-drain power-good flag; asserts high-impedance when VOUT is within ±4% and die temp <120°C |
| A3, A4 | VIN | Main power input (2.35–5.4V); connects to 22µF input capacitor at PGND |
| B1 | VSEL | Output voltage select: LOW = 3.7V, HIGH = 3.77V; sets VOUT offset during boost operation |
| B2, C2, D1 | GND | Analog ground reference for error amplifier and bias circuits; must be star-connected to PGND |
| B3, B4 | VOUT | Regulated output; requires two parallel 22µF X5R ceramics to PGND for stability and transient response |
| C1 | BYPS | Forced Bypass control: LOW enables bypass mode (Q3 active), HIGH enables Auto Bypass decision logic |
| C3, C4 | LX | Switch node connecting to inductor; carries high di/dt current-requires short, low-inductance trace |
| D2, D3, D4 | PGND | Power ground return for LX, VOUT, and internal FETs; must be solid copper plane under IC |
Key Features
| Feature | Design Value |
|---|---|
| Input-to-output bypass | 38mΩ integrated P-MOSFET enables direct VIN→VOUT path, reducing dropout to <100mV at 1A |
| Dual-output voltage selection | VSEL pin selects between 3.7V (LO) and 3.77V (HI) to compensate for load transient droop |
| Ultra-low quiescent current | 45µA in Forced Bypass mode minimizes battery drain during system sleep states |
| High-frequency switching | 2.5MHz operation allows 0.47µH inductor and total output capacitance ≤44µF, shrinking solution size |
| Robust protection suite | Includes hiccup-mode overcurrent, thermal warning/shutdown (120°C/150°C), and UVLO with hysteresis |
Applications
| Smartphone Power Management | USB OTG Power Source |
|---|---|
|
Use Scenario: Supplies 3.7V rail to camera module or RF transceiver during peak transmit bursts in battery-powered smartphones. IC Role / Device Role / Timing Role: Boost regulator with seamless transition to bypass mode when battery voltage rises above 3.7V during charging. Use Value: Maintains stable 3.7V output with <100mV dropout in bypass, extending talk time and reducing thermal stress on PMIC. |
Use Scenario: Powers USB peripheral devices (e.g., flash drives, keyboards) directly from smartphone battery via OTG cable. IC Role / Device Role / Timing Role: Provides regulated 3.7V/3.77V output with fast load-step response (<100µs) to handle sudden USB enumeration current demands. Use Value: Delivers 2.3A peak without external LDO, eliminating need for discrete boost + LDO cascades and saving PCB area. |
| 2G/3G/4G RF Power Amplifier Supply | Tablet PC Display Backlight Driver Bias |
|
Use Scenario: Supplies dynamic bias voltage to PA stages in cellular handsets where supply must track battery voltage closely. IC Role / Device Role / Timing Role: Functions as adaptive supply: boosts when VIN < VOUT, bypasses when VIN ≥ VOUT, minimizing conversion loss. Use Value: Achieves up to 96% efficiency across full battery range (3.0–4.2V), directly improving RF PA efficiency and battery life. |
Use Scenario: Generates 3.7V bias rail for LED driver ICs powering LCD backlight in compact tablets. IC Role / Device Role / Timing Role: Regulator with soft-start (600µs) and PG flag ensures clean power-up sequence for display subsystem initialization. Use Value: Dual VSEL-selectable outputs allow fine-tuning of LED current compliance voltage, reducing brightness variation across units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost-with-bypass applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 3A output, but no integrated bypass FET; requires external MOSFET and control logic for VIN≈VOUT operation | Used where higher current >2.3A is needed, but adds complexity and board space for bypass implementation | Choose TPS61088RHLR only if 3A continuous output is mandatory and layout area permits external bypass circuitry. |
| MAX77818EWJ+T | Single-input, dual-output PMIC with integrated buck-boost + LDO; includes 3.7V boost channel but no bypass mode | Targeted at multi-rail SoC power where sequencing and integration outweigh standalone efficiency needs | Prefer MAX77818EWJ+T when consolidating multiple rails onto one IC; avoid if bypass efficiency at VIN≈VOUT is critical. |
Compared with TPS61088RHLR and MAX77818EWJ+T, the ISL91133IIOZ-T uniquely integrates a 38mΩ bypass FET with automatic mode selection, delivering superior efficiency near battery voltage crossover without external components or timing coordination.
Availability
ISL91133IIOZ-T is available at Aetrix Electronics and suitable for smartphone power management, USB OTG power sources, and RF power amplifier supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant WLCSP packaging.
Supply support for ISL91133IIOZ-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 is a global semiconductor leader specializing in microcontrollers, analog power, and connectivity solutions for automotive, industrial, and consumer markets.
The ISL91133 product line targets portable battery-powered systems needing high-efficiency, compact, and intelligent power conversion-specifically addressing the efficiency cliff near VIN ≈ VOUT in single-cell Li-ion applications.
FAQ
What output voltages does the ISL91133IIOZ-T support?
The ISL91133IIOZ-T provides two factory-trimmed fixed output voltages: 3.7V (LO) and 3.77V (HI), selected by the logic level on the VSEL pin. These values are optimized to compensate for load transient droop in portable applications. The ISL91133IIOZ-T does not support adjustable output via external resistors-it relies solely on VSEL for selection between these two precise levels.
How does the ISL91133IIOZ-T enter and exit Forced Bypass mode?
The ISL91133IIOZ-T enters Forced Bypass mode when the BYPS pin is driven LOW. If VOUT > VIN at entry, the IC first disables boost operation and activates an internal discharge circuit to bring VOUT down to VIN before engaging the 38mΩ bypass FET. Exit occurs when BYPS is returned HIGH, triggering a controlled transition back to boost mode with soft-start. This behavior is fully documented in the ISL91133IIOZ-T datasheet Figure 21.
What is the purpose of separate GND and PGND pins on the ISL91133IIOZ-T?
The ISL91133IIOZ-T separates analog ground (GND) and power ground (PGND) to prevent noise coupling from high-di/dt switching currents into sensitive reference and error amplifier circuitry. GND pins (B2, C2, D1) serve bias and control functions, while PGND pins (D2, D3, D4) carry inductor return current and VOUT capacitor discharge current. Proper PCB layout requires independent low-impedance connections to a common ground plane beneath the IC.
Does the ISL91133IIOZ-T support automatic transition between boost and bypass modes?
Yes-the ISL91133IIOZ-T supports Auto Bypass mode when the BYPS pin is held HIGH. In this mode, the IC monitors VIN relative to VOUT and enters bypass when VIN exceeds VOUT by 1.5% for 5µs with no switching activity. The transition is seamless and internally managed, requiring no host processor intervention. This feature is confirmed in the ISL91133IIOZ-T Functional Description section on page 10 of FN8680 Rev 1.00.
What protection features are built into the ISL91133IIOZ-T?
The ISL91133IIOZ-T integrates overcurrent protection (hiccup mode triggered after 16 consecutive current-limit cycles), thermal shutdown (150°C) with 20°C hysteresis, undervoltage lockout (2.35V rising threshold), and load disconnect on disable. It also includes reverse leakage current limiting (<1µA) and open-drain PG flag deassertion during overtemperature warning (120°C) or output fault conditions-all specified and tested per the ISL91133IIOZ-T Electrical Specifications table.
ISL91133IIOZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.35V
- Voltage - Input (Max):
- 5.4V
- Voltage - Output (Min/Fixed):
- 3.15V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 2.3A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLCSP (1.78x1.78)
ISL91133IIOZ-T FAQ
1.How can I place an order for ISL91133IIOZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91133IIOZ-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 ISL91133IIOZ-T reliable?
The price and inventory of ISL91133IIOZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91133IIOZ-T is usually 5 days.
3.What payment methods are accepted for ISL91133IIOZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91133IIOZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91133IIOZ-T?
ISL91133IIOZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91133IIOZ-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 ISL91133IIOZ-T?
For technical support, including ISL91133IIOZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91133IIOZ-T requirements.
6.How does Aetrix verify that ISL91133IIOZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91133IIOZ-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 ISL91133IIOZ-T meets industry standards.
7.What is the process for return or replacement of ISL91133IIOZ-T?
All ISL91133IIOZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91133IIOZ-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 ISL91133IIOZ-T part is unused and in its original packaging.
Return procedure for ISL91133IIOZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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