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Renesas ISL91133IIPZ-T
- Part No.:
- ISL91133IIPZ-T
- Manufacturer:
- Renesas
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
ISL91133IIPZ-T.pdf
- Description:
- IC REG BOOST PROG 2.3A 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,705
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Product details
Overview
ISL91133IIPZ-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 = 3.3V from VIN = 2.5V, features 38mΩ bypass MOSFET, 2.5MHz switching frequency, and supports fixed 4.5V/4.76V dual-output selection via VSEL pin.
For engineers reviewing the ISL91133IIPZ-T datasheet, ISL91133IIPZ-T pinout, ISL91133IIPZ-T application, or ISL91133IIPZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed WLCSP-16 package mapping, real-world efficiency curves, and two rigorously cross-checked alternative parts for battery-powered RF power amplifier and USB OTG supply designs.
Technical Context
The ISL91133IIPZ-T implements valley-current-mode PWM control with internal slope compensation and a 2.5MHz oscillator, enabling stable regulation across 2.35V–5.4V input and 4.5V/4.76V fixed outputs. Its dual-mode operation-boost (Q1/Q2 active) and forced/auto bypass (Q3 active)-is managed by dedicated BYPS and VSEL logic inputs with defined hysteresis and current-limit thresholds.
Bypass mode uses a 38mΩ P-channel MOSFET (Q3) with 150mV overcurrent protection during VIN-VOUT transition, while boost mode employs synchronous N/P-channel switches with 40mΩ/45mΩ typical RDS(ON). Thermal shutdown activates at +150°C with +120°C warning flag asserted on PG pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.35V to 5.4V - supports full discharge range of one-cell Li-ion batteries without brownout. |
| Output Current (Boost) | 2.3A DC at VIN=2.5V, VOUT=3.3V - sufficient for RF PA bias in 4G handsets. |
| Bypass RDS(ON) | 38mΩ - enables <150mV dropout at 1.5A, critical for USB OTG VBUS hold-up. |
| Switching Frequency | 2.5MHz (typ) - allows use of 0.47µH inductor and compact 22µF ceramic output caps. |
| Quiescent Current | 45µA in Forced Bypass mode - extends standby time in always-on mobile subsystems. |
| Soft-Start Time | 1200µs - prevents inrush current into large output capacitance during power-up. |
| Thermal Shutdown | +150°C with +20°C hysteresis - protects against sustained overload in sealed enclosures. |
Pinout & Package
ISL91133IIPZ-T is packaged in a 16-ball, 0.4mm pitch, 1.78mm × 1.78mm WLCSP (Wafer-Level Chip-Scale Package) per drawing W4x4.16E, RoHS-compliant with SnAgCu solder balls and MSL3 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | EN | Logic-enable input; HIGH activates device, LOW forces shutdown with load disconnect. |
| A2 | PG | Open-drain power-good flag; pulled low if VOUT drops below 96%, die temp ≥120°C, or fault occurs. |
| A3, A4 | VIN | Main power input; connects to 22µF capacitor and battery anode; dual pins reduce IR drop. |
| B1 | VSEL | Output voltage select; HIGH selects 4.76V, LOW selects 4.5V for dynamic load transient compensation. |
| B2, C2, D1 | GND | Analog ground reference; separate from PGND to prevent noise coupling into error amplifier. |
| B3, B4 | VOUT | Regulated output; connects to dual 22µF capacitors; shared between boost and bypass paths. |
| C1 | BYPS | Bypass mode control; LOW forces bypass, HIGH enables auto-bypass entry when VIN > VOUT + 1.5%. |
| C3, C4 | LX | Switch node; connects to inductor; carries high di/dt current requiring short PCB trace routing. |
| D2, D3, D4 | PGND | Power ground return for LX and internal FETs; must be tied to GND plane with multiple vias. |
Key Features
| Feature | Design Value |
|---|---|
| Forced & Auto Bypass Modes | Enables seamless transition between boost and direct VIN-to-VOUT path with 38mΩ RDS(ON), reducing dropout and improving light-load efficiency. |
| PFM/PWM Hybrid Control | Automatically shifts to PFM below 300mA load, cutting quiescent current to 108µA and extending battery life in idle states. |
| Integrated Protection Suite | Includes overcurrent (hiccup mode), thermal warning/shutdown (+120°C/+150°C), undervoltage lockout (2.35V), and output short-circuit foldback. |
| Voltage Select Pin (VSEL) | Allows runtime selection between 4.5V and 4.76V outputs to compensate for load transient droop without external resistors. |
| Small WLCSP Footprint | 1.78mm × 1.78mm size enables integration into space-constrained mobile PCBs where traditional QFN packages cannot fit. |
Applications
| Smartphone RF Power Amplifier Supply | USB OTG VBUS Source |
|---|---|
Use Scenario: Powers 2G/3G/4G RF power amplifiers requiring stable 4.5–4.76V rail during burst transmission. IC Role / Device Role / Timing Role: Boost regulator with bypass capability maintains VOUT within ±2% under 0–2.3A dynamic load steps and fast VIN sag (e.g., battery discharge). Use Value: 96% peak efficiency and 45µA bypass quiescent current extend talk time and reduce thermal load on antenna modules. | Use Scenario: Supplies 5V VBUS to USB peripherals from a 3.7V Li-ion battery in portable OTG hosts. IC Role / Device Role / Timing Role: Acts as regulated 4.76V source with forced bypass mode engaged when VIN rises above 4.76V during charging, eliminating conversion loss. Use Value: 38mΩ bypass switch ensures <150mV dropout at 1.5A, meeting USB 2.0 VBUS tolerance (4.4–5.25V) without external LDO post-regulation. |
| Tablet PC Core Logic Rail | Wearable Sensor Hub Power |
Use Scenario: Generates clean 4.5V supply for baseband processors and memory interfaces in ultra-thin tablets. IC Role / Device Role / Timing Role: Synchronous boost converter with internal compensation delivers fast load transient response (<100µs recovery) and low output ripple (1.5% VOUT). Use Value: 2.5MHz switching frequency permits use of 0.47µH inductor and 22µF X5R ceramics, minimizing solution footprint to <12mm². | Use Scenario: Powers always-on sensor fusion hub (accelerometer, gyroscope, BLE radio) from coin-cell or small Li-ion battery. IC Role / Device Role / Timing Role: Provides regulated 4.5V rail with programmable soft-start (1200µs) and hiccup-mode overcurrent protection to prevent brownout during sensor wake-up bursts. Use Value: 108µA boost-mode IQ and open-drain PG flag enable precise system-level power sequencing and health monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator with bypass applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 4.5A output, no integrated bypass FET, requires external MOSFET for VIN-to-VOUT pass-through. | Suitable for higher-current applications but adds layout complexity and component count for bypass function. | Choose when >2.3A continuous output is required and board space allows discrete bypass implementation. |
| MAX77818EWJ+T | Single-input dual-output PMIC with integrated buck-boost + LDO; bypass not implemented as discrete FET path. | Targets multi-rail SoC power management rather than dedicated high-efficiency single-rail boost+bypass. | Prefer when system requires coordinated sequencing of multiple rails and lower total solution cost justifies added IC complexity. |
Compared with TPS61088RHLR and MAX77818EWJ+T, the ISL91133IIPZ-T uniquely integrates a 38mΩ bypass FET and dual-output voltage selection in a 1.78mm² WLCSP, delivering optimal size, efficiency, and simplicity for single-rail battery-powered RF and OTG applications.
Availability
ISL91133IIPZ-T is available at Aetrix Electronics and suitable for smartphone RF power amplifier supply, USB OTG VBUS source, and wearable sensor hub power requiring stable component supply across high-volume consumer electronics production.
Supply support for ISL91133IIPZ-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 is a global semiconductor leader delivering trusted embedded design innovation, with expertise in analog, power, and mixed-signal solutions for automotive, industrial, and consumer markets.
The ISL91133 product line targets ultra-compact, high-efficiency power conversion in battery-powered mobile devices, emphasizing low quiescent current, integrated bypass capability, and WLCSP packaging for space-constrained layouts.
FAQ
What output voltages does the ISL91133IIPZ-T support?
The ISL91133IIPZ-T supports two fixed output voltages: 4.5V (VSEL = LOW) and 4.76V (VSEL = HIGH). These values are factory-trimmed and specified across -40°C to +85°C ambient temperature. The VSEL pin allows dynamic selection between these levels to compensate for load transient droop without external feedback resistors. This dual-voltage capability is unique to the IIPZ variant and confirmed in the Ordering Information table on page 3 of FN8680 Rev 1.00.
How does the ISL91133IIPZ-T enter and exit Forced Bypass mode?
The ISL91133IIPZ-T enters Forced Bypass mode when the BYPS pin is driven LOW. If VOUT > VIN at entry, the device first discharges VOUT to VIN level using an internal circuit before engaging the 38mΩ bypass FET (Q3); if VOUT ≤ VIN, Q3 activates immediately. Exit occurs when BYPS is returned HIGH, triggering a controlled transition back to boost mode. This behavior is explicitly detailed in the Functional Description section (page 9) and illustrated in Figure 21 of the datasheet.
What is the maximum continuous output current for the ISL91133IIPZ-T in boost mode?
The ISL91133IIPZ-T delivers up to 2.3A DC output current in boost mode when VIN = 2.5V and VOUT = 3.3V, as specified in the Features list (page 1) and Electrical Specifications table (page 4). At its configured 4.5V/4.76V outputs, the achievable current decreases due to reduced duty cycle and higher conduction losses; the datasheet does not specify a higher absolute limit beyond the 2.3A condition, and no derating curve is provided for elevated VOUT.
Does the ISL91133IIPZ-T include thermal protection, and how does it behave?
Yes, the ISL91133IIPZ-T includes thermal protection with two thresholds: thermal warning at +120°C (asserts PG low) and thermal shutdown at +150°C (disables all switching). After shutdown, the device remains off until die temperature falls to +120°C, then resumes normal operation. This hysteresis is confirmed in the Electrical Specifications table (page 5) and Functional Description (page 11), ensuring reliable protection without oscillation during sustained overload.
What package type and dimensions does the ISL91133IIPZ-T use?
The ISL91133IIPZ-T uses a 16-ball WLCSP (Wafer-Level Chip-Scale Package) with 0.4mm pitch and overall dimensions of 1.78mm × 1.78mm, per package drawing W4x4.16E (page 13). It features SnAgCu solder balls, complies with RoHS, and has Moisture Sensitivity Level 3. This package is distinct from QFN or TQFN variants and is optimized for minimal PCB footprint in mobile applications.
ISL91133IIPZ-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)
ISL91133IIPZ-T FAQ
1.How can I place an order for ISL91133IIPZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91133IIPZ-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 ISL91133IIPZ-T reliable?
The price and inventory of ISL91133IIPZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91133IIPZ-T is usually 5 days.
3.What payment methods are accepted for ISL91133IIPZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91133IIPZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91133IIPZ-T?
ISL91133IIPZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91133IIPZ-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 ISL91133IIPZ-T?
For technical support, including ISL91133IIPZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91133IIPZ-T requirements.
6.How does Aetrix verify that ISL91133IIPZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91133IIPZ-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 ISL91133IIPZ-T meets industry standards.
7.What is the process for return or replacement of ISL91133IIPZ-T?
All ISL91133IIPZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91133IIPZ-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 ISL91133IIPZ-T part is unused and in its original packaging.
Return procedure for ISL91133IIPZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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