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Renesas ISL91133IILZ-T
- Part No.:
- ISL91133IILZ-T
- Manufacturer:
- Renesas
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
ISL91133IILZ-T.pdf
- Description:
- IC REG BOOST PROG 2.3A 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,241
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Product details
Overview
ISL91133IILZ-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 3.3V output from 2.5V input, features 38mΩ bypass MOSFET, 2.5MHz switching frequency, and operates across –40°C to +85°C ambient temperature.
For engineers reviewing the ISL91133IILZ-T datasheet, ISL91133IILZ-T pinout, ISL91133IILZ-T application, or ISL91133IILZ-T equivalent, key selection criteria include its dual-mode operation (boost/bypass), ultra-low quiescent current (108μA in boost, 45μA in forced bypass), fixed 3.15V/3.3V dual-output capability, and WLCSP-16 package compatibility with space-constrained portable power designs.
Technical Context
The ISL91133IILZ-T implements valley-current-mode PWM control with internal N- and P-channel MOSFETs (rDS(ON) = 45mΩ/40mΩ) and supports automatic or forced bypass via dedicated BYPS pin. Its soft-start sequence uses two-stage linear current sources (ILIN1 = 1300mA, ILIN2 = 2400mA) to manage inrush into large output capacitors.
Bypass mode engages a 38mΩ P-channel MOSFET (Q3) directly connecting VIN to VOUT, enabling dropout as low as 150mV under load. The device integrates thermal warning (+120°C), shutdown (+150°C), overcurrent protection (4A valley limit), and open-drain PG flag with early fault indication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2.3A DC at VIN = 2.5V, VOUT = 3.3V - supports high-current RF PA biasing without external current boosting |
| Switching Frequency | 2.5MHz typical - enables use of compact 0.47µH inductor and reduces EMI filtering requirements |
| Bypass RDS(ON) | 38mΩ - achieves <150mV dropout at 1A, critical for USB OTG VBUS regulation near battery voltage |
| Quiescent Current | 108μA (boost), 45μA (forced bypass) - extends standby time in always-on mobile subsystems |
| Input Voltage Range | 2.35V to 5.4V - covers full Li-ion discharge curve (3.0–4.2V) plus USB 5V tolerance |
| Output Voltage Options | 3.15V / 3.3V (VSEL-controlled) - provides margin for load transient droop compensation in smartphone PMIC rails |
| Package | 16-ball WLCSP, 1.78mm × 1.78mm, 0.4mm pitch - meets ultra-thin mobile PCB stack-up constraints |
Pinout & Package
ISL91133IILZ-T is housed in a 16-ball Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch and 1.78mm × 1.78mm footprint. The package uses non-solder-mask-defined (NSMD) pads and is RoHS-compliant with SnAgCu e1 solder balls.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (A3, A4) | Power input | Accepts 2.35–5.4V; requires local 22µF ceramic capacitor to PGND for stability |
| VOUT (B3, B4) | Regulated output | Delivers boosted or bypassed voltage; connects to dual 22µF output caps |
| LX (C3, C4) | Inductor switch node | Drives external 0.47µH inductor; high dv/dt node requiring tight layout to PGND |
| PGND (D2, D3, D4) | Power ground | Carries high-frequency switching current; must be separated from analog GND |
| GND (B1, B2, C2, D1) | Analog ground | Reference for error amplifier and logic; routed separately from PGND to avoid noise coupling |
| EN (A1) | Enable control | Active-high logic input; pulls down to disable IC and disconnect load |
| BYPS (C1) | Bypass mode select | Pull LOW for forced bypass; HIGH for auto-bypass (enters when VIN > 1.015×VOUT for 5µs) |
| VSEL (A4) | Output voltage select | HI selects 3.3V, LO selects 3.15V in boost mode - enables dynamic rail scaling |
| PG (A2) | Power-good flag | Open-drain output asserted when VOUT is within ±4% and die temp <120°C |
Key Features
| Feature | Design Value |
|---|---|
| Forced & Auto Bypass Modes | 38mΩ bypass FET enables seamless transition between boost and LDO-like operation, reducing power loss when VIN approaches VOUT |
| PFM/PWM Hybrid Control | Automatic mode switching at 300–500mA load threshold maintains >90% efficiency from 100µA to 2.3A |
| Integrated Protection Suite | Thermal warning (+120°C), shutdown (+150°C), overcurrent (4A valley limit), and undervoltage lockout (2.35V) prevent field failures |
| Load Disconnect on Shutdown | Internal switch isolates VOUT from VIN when EN = LOW - eliminates battery drain in powered-off state |
| Voltage Select Pin (VSEL) | Two-level output programming (3.15V/3.3V) compensates for IR drop during RF transmit bursts without external resistors |
Applications
| Smartphone Power Management | USB OTG Power Source |
|---|---|
Use Scenario: Supplies regulated 3.3V rail to cellular modem and GPS receiver during LTE transmission bursts. IC Role / Device Role / Timing Role: Boost regulator with bypass mode acts as primary system PMIC rail, dynamically switching between boost and direct pass-through based on battery voltage. Use Value: Maintains stable 3.3V under 2.3A peak load while minimizing dropout and heat generation during battery voltage sag below 3.4V. | Use Scenario: Powers USB peripherals from smartphone battery when acting as host. IC Role / Device Role / Timing Role: Provides compliant 5V VBUS from 3.0–4.2V Li-ion battery with fast transient response to plug-in events. Use Value: Delivers up to 2.3A at 5V using boost mode, then seamlessly transitions to bypass when external 5V source is detected - eliminating backfeed risk. |
| 2G/3G/4G RF Power Amplifier Bias | Tablet PC Display Backlight Driver |
Use Scenario: Generates 3.3V bias for multi-band RF power amplifiers in LTE handsets. IC Role / Device Role / Timing Role: High-current boost converter with fast load-step response ensures stable PA supply during modulation peaks. Use Value: Achieves <200mV output droop under 1.5A step load (10mA→1500mA) due to 2.5MHz switching and optimized compensation. | Use Scenario: Supplies 3.15V/3.3V logic rail to display timing controller and interface ICs in thin tablets. IC Role / Device Role / Timing Role: Dual-voltage configurable regulator powers multiple display subsystems from shared battery input. Use Value: VSEL pin allows firmware-selectable output voltage to match specific panel driver requirements without hardware change. |
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 pass-through mode | Suitable for higher-power applications but adds complexity and board area for bypass functionality | Choose when >2.3A output or adjustable VOUT is required; avoid if space-constrained bypass is mandatory |
| MAX77818EWJ+T | PMIC with integrated buck-boost + bypass, wider input (2.5–5.5V), but larger 32-pin WLP package | Targets full-system power management rather than single-rail boost/bypass; includes charger and fuel gauge | Choose for multi-rail SoC power; avoid for discrete boost/bypass where minimal footprint is critical |
Compared with TPS61088RHLR and MAX77818EWJ+T, the ISL91133IILZ-T uniquely combines 2.3A boost capability, integrated 38mΩ bypass FET, and 1.78mm² WLCSP in a single chip - delivering optimal size, efficiency, and simplicity for single-rail portable power rails.
Availability
ISL91133IILZ-T is available at Aetrix Electronics and suitable for smartphones, USB OTG power sources, and RF power amplifier biasing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL91133IILZ-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 management, and timing solutions for automotive, industrial, and consumer markets.
The ISL91133 product line delivers highly integrated, space-optimized DC-DC regulators for battery-powered portable electronics - emphasizing ultra-low quiescent current, adaptive bypass operation, and robust protection for mission-critical mobile power rails.
FAQ
What output voltages does the ISL91133IILZ-T support?
The ISL91133IILZ-T supports two fixed output voltages: 3.15V and 3.3V. Selection is controlled by the VSEL pin - pulled HIGH for 3.3V, LOW for 3.15V - enabling dynamic adjustment to compensate for load transient droop in real-time. This dual-voltage capability is factory-configured for the IILZ-T variant and does not require external resistor networks.
How does the ISL91133IILZ-T enter and exit bypass mode?
The ISL91133IILZ-T supports both auto and forced bypass modes. Auto bypass activates when the BYPS pin is HIGH and VIN exceeds 1.015×VOUT for 5µs with no switching activity. Forced bypass triggers immediately when BYPS is pulled LOW. In forced mode, if VOUT > VIN, the IC first discharges VOUT to VIN level using an internal circuit before engaging the 38mΩ bypass FET - preventing reverse current flow.
What is the maximum continuous output current of the ISL91133IILZ-T?
The ISL91133IILZ-T delivers up to 2.3A DC output current under specified conditions: VIN = 2.5V, VOUT = 3.3V, TA = +25°C. At higher input voltages (e.g., VIN = 3.6V), thermal limits may reduce sustained current. Burst current capability reaches 2.5A for short durations (tON < 600µs, period = 4.6ms), supporting RF PA peak demands without derating.
Does the ISL91133IILZ-T provide load disconnect functionality?
Yes, the ISL91133IILZ-T provides true load disconnect when disabled. When the EN pin is driven LOW, internal switches isolate the VOUT rail from VIN, and the PG pin is deasserted. This prevents battery drain in standby or shutdown states - a critical feature for always-on mobile subsystems such as NFC or sensor hubs powered by the same battery.
What package type and dimensions does the ISL91133IILZ-T use?
The ISL91133IILZ-T uses a 16-ball Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch and overall dimensions of 1.78mm × 1.78mm × 0.29mm. It features non-solder-mask-defined (NSMD) copper pads and SnAgCu e1 solder balls, meeting IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for Pb-free reflow. The compact size targets ultra-thin mobile PCBs with strict height constraints.
ISL91133IILZ-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)
ISL91133IILZ-T FAQ
1.How can I place an order for ISL91133IILZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91133IILZ-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 ISL91133IILZ-T reliable?
The price and inventory of ISL91133IILZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91133IILZ-T is usually 5 days.
3.What payment methods are accepted for ISL91133IILZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91133IILZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91133IILZ-T?
ISL91133IILZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91133IILZ-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 ISL91133IILZ-T?
For technical support, including ISL91133IILZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91133IILZ-T requirements.
6.How does Aetrix verify that ISL91133IILZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91133IILZ-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 ISL91133IILZ-T meets industry standards.
7.What is the process for return or replacement of ISL91133IILZ-T?
All ISL91133IILZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91133IILZ-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 ISL91133IILZ-T part is unused and in its original packaging.
Return procedure for ISL91133IILZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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