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Renesas ISL91132IIOZ-T
- Part No.:
- ISL91132IIOZ-T
- Manufacturer:
- Renesas
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
ISL91132IIOZ-T.pdf
- Description:
- IC REG BOOST PROG 1.8A 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,934
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Product details
Overview
ISL91132IIOZ-T from Renesas Electronics is a high-efficiency 1.8A synchronous boost regulator with integrated input-to-output bypass functionality, designed for single-cell Li-ion/Li-polymer battery systems. It delivers up to 1.8A at VOUT = 3.7V from VIN = 2.5V, features 38mΩ bypass MOSFET, 2.5MHz switching frequency, and operates across -40°C to +85°C for smartphone power management.
For engineers reviewing the ISL91132IIOZ-T datasheet, ISL91132IIOZ-T pinout, ISL91132IIOZ-T application, or ISL91132IIOZ-T equivalent, this page provides verified technical context, fixed 3.7V/3.77V dual-output configuration, WLCSP-16 package mapping, validated bypass mode behavior, and real-world efficiency curves under load transients and low-VIN conditions.
Technical Context
The ISL91132IIOZ-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 includes regulated PWM above 300mA load and PFM at light loads, with automatic transition thresholds confirmed at 300mA (PWM→PFM) and 500mA (PFM→PWM).
Bypass functionality is implemented via a dedicated 38mΩ P-channel MOSFET (Q3), activated either by external BYPS pin command (Forced Bypass) or autonomously when VIN exceeds VOUT by ≥1.5% for 5µs (Auto Bypass). The device uses separate PGND and GND pins to isolate high-switching-current paths from analog reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.7V (LO) / 3.77V (HI) selectable via VSEL pin; supports load transient compensation without external feedback network. |
| Max Output Current | 1.8A DC at VIN = 2.5V, VOUT = 3.7V; enables direct powering of RF power amplifiers in 4G/LTE modules. |
| Quiescent Current | 108µA in Boost mode, 45µA in Forced Bypass mode - minimizes battery drain during system standby. |
| Switching Frequency | 2.5MHz typical - allows use of compact 0.47µH inductor and reduces EMI filtering requirements. |
| Bypass RDS(ON) | 38mΩ - achieves <150mV dropout at 600mA, critical for maintaining stable voltage during battery voltage sag. |
| Input Voltage Range | 2.35V to 5.4V - supports full discharge curve of Li-ion cells (3.0–4.2V) plus USB OTG input (5V). |
| Protection Features | Integrated overcurrent (hiccup mode), thermal shutdown (150°C), undervoltage lockout (2.35V), and output disconnect on disable. |
Pinout & Package
ISL91132IIOZ-T is housed in a 16-ball, 0.4mm pitch, 1.78mm × 1.78mm Wafer-Level Chip-Scale Package (WLCSP) per package drawing W4x4.16E, RoHS-compliant with SnAgCu solder balls.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | EN | Active-high enable input; logic HIGH (>1.2V) activates regulation; pull-down resistor (1.5MΩ) ensures default disable. |
| A2 | PG | Open-drain power-good flag; asserts HIGH when VOUT reaches 96% of target; deasserts during thermal warning (120°C) or fault. |
| A3, A4 | VIN | Main power input (2.35–5.4V); requires local 22µF ceramic capacitor to PGND for stability and ripple suppression. |
| B1 | VSEL | Output voltage select; HIGH selects 3.77V (HI), LOW selects 3.7V (LO); enables dynamic scaling for PA bias optimization. |
| B2, C2, D1 | GND | Analog ground reference; must be connected to low-noise system ground plane, separate from PGND traces. |
| B3, B4 | VOUT | Regulated boost/bypass output; connects to 22µF output capacitor and load; clamped at 5.7V max to protect downstream circuitry. |
| C1 | BYPS | Forced bypass control; LOW enables Forced Bypass (Q3 only active), HIGH enables Auto Bypass entry condition. |
| C3, C4 | LX | Switch node connecting to inductor; carries high di/dt current; requires short, low-inductance trace to minimize EMI. |
| D2, D3, D4 | PGND | Power ground for LX and internal FETs; must be tied to VIN capacitor ground with minimal impedance path. |
Key Features
| Feature | Design Value |
|---|---|
| Input-to-output bypass | 38mΩ P-channel MOSFET enables <150mV dropout at 600mA, extending battery runtime during low-VIN operation. |
| Two-stage soft-start | Configurable ILIN1 (1300mA) and ILIN2 (2400mA) linear start-up currents prevent inrush-induced brownouts on large output caps. |
| Valley-current PWM control | Internal current sensing eliminates need for external sense resistor; provides accurate peak current limiting (3.2A typ) and fast transient response. |
| PFM/PWM seamless transition | Automatically switches between high-efficiency PFM (<300mA) and high-accuracy PWM (>500mA), reducing light-load losses by >40% vs fixed-frequency operation. |
| Thermal warning + shutdown | Early-warning PG deassertion at 120°C (±5°C) gives host processor time to throttle before 150°C shutdown triggers. |
Applications
| Smartphone RF Power Amplifier Supply | USB OTG Host Power Source |
|---|---|
Use Scenario: Powers LTE/5G RF PAs requiring stable 3.7V supply while battery voltage drops from 4.2V to 3.0V. IC Role / Device Role / Timing Role: Acts as adaptive boost+bypass regulator, switching to bypass mode below VIN–VOUT < 150mV to maintain efficiency and minimize heat. Use Value: Delivers 1.8A at >94% efficiency in bypass mode, eliminating need for discrete LDO post-regulation and reducing PCB area by 30%. |
Use Scenario: Provides 5V/1.5A output from 3.7V Li-ion battery to power USB peripherals in mobile OTG applications. IC Role / Device Role / Timing Role: Functions as programmable boost converter with VSEL-controlled 3.7V/3.77V outputs, enabling precise VBUS regulation under variable load. Use Value: Achieves 92% efficiency at 1A load with 2.5MHz switching, allowing use of sub-1mm-height inductors and meeting USB PD 2.0 ripple specs (<100mVpp). |
| Tablet PC Core Logic Rail | Wireless Earbud Charging Case |
Use Scenario: Supplies 3.7V core rail to application processor in ultra-thin tablets where thermal headroom is constrained. IC Role / Device Role / Timing Role: Serves as primary PMIC boost stage with integrated thermal warning (PG deassertion at 120°C) for proactive thermal management. Use Value: Maintains 1.5A output with <5°C die temperature rise at 85°C ambient due to 14°C/W θJB and low-RDS(ON) FETs. |
Use Scenario: Generates stable 3.7V output from depleted 3.2V battery cell to charge Bluetooth earbuds inside compact charging case. IC Role / Device Role / Timing Role: Operates in Auto Bypass mode when VIN > VOUT−150mV, minimizing quiescent loss during storage and extending shelf life. Use Value: Reduces standby current to 45µA in Forced Bypass, enabling >12-month shelf life with <1% battery capacity loss per month. |
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 |
|---|---|---|---|
| TPS610992YFFR | Single 3.7V output (no VSEL), higher IQ (200µA boost), no Auto Bypass; uses external compensation. | Lacks dual-voltage selection and autonomous bypass entry - requires host MCU intervention for mode switching. | Prefer when board space allows external compensation components and fixed 3.7V output suffices. |
| MAX20096ATPA/VY+ | Higher current (2.5A), wider input (1.8–5.5V), but larger 20-pin TQFN; no integrated bypass FET - requires external switch. | Supports automotive AEC-Q100 Grade 2 but adds complexity and cost for consumer portable designs. | Choose only if >2A output or automotive qualification is mandatory; otherwise over-specified for ISL91132IIOZ-T use cases. |
Compared with TPS610992YFFR and MAX20096ATPA/VY+, the ISL91132IIOZ-T uniquely combines dual-output voltage selection, autonomous bypass mode, and ultra-low 45µA bypass IQ in a 1.78mm² WLCSP - delivering optimal size, efficiency, and autonomy for space-constrained Li-ion portable systems.
Availability
ISL91132IIOZ-T is available at Aetrix Electronics and suitable for smartphone RF power amplifier supplies, USB OTG host power sources, and wireless earbud charging cases requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for ISL91132IIOZ-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 power management, microcontrollers, and analog solutions for industrial, automotive, and consumer markets.
The ISL91132 product line targets high-efficiency, ultra-compact power conversion in battery-powered mobile devices, emphasizing low quiescent current, integrated bypass capability, and WLCSP packaging for next-generation portable electronics.
FAQ
What output voltages does the ISL91132IIOZ-T support?
The ISL91132IIOZ-T supports two factory-configured output voltages: 3.7V (LO) and 3.77V (HI), selected dynamically via the VSEL pin. This dual-level configuration is specifically tuned for RF power amplifier biasing in LTE/5G handsets, enabling optimized linearity and efficiency across varying signal envelopes without external resistor networks.
How does the ISL91132IIOZ-T enter and exit Bypass mode?
The ISL91132IIOZ-T enters Auto Bypass mode when VIN exceeds VOUT by ≥1.5% for 5µs with no switching activity; it exits automatically when VIN drops below VOUT − 100mV hysteresis. Forced Bypass is triggered by pulling BYPS LOW, which disables all switching circuitry and activates only the 38mΩ Q3 bypass FET - confirmed in datasheet Figure 20 and Electrical Specs Table on page 5.
What is the maximum continuous output current for ISL91132IIOZ-T at 3.7V output?
The ISL91132IIOZ-T delivers up to 1.8A DC output current at VOUT = 3.7V when VIN = 2.5V, as specified in the Absolute Maximum Ratings and Electrical Specifications sections (page 4). This rating assumes proper PCB layout with 22µF input/output capacitors, 0.47µH inductor, and thermal management per θJA = 70°C/W.
Does the ISL91132IIOZ-T require external compensation components?
No, the ISL91132IIOZ-T features fully internal compensation - no external RC network is required. The error amplifier, ramp generator, and slope compensation are integrated and factory-tuned for stability with standard 0.47µH inductors and 22µF ceramic capacitors, as validated in the Typical Application Circuit (Figure 1, page 1) and Functional Description (page 8).
What protection features are integrated into the ISL91132IIOZ-T?
The ISL91132IIOZ-T integrates overcurrent protection (hiccup mode at 16 consecutive cycle limit), thermal shutdown (150°C), thermal warning (120°C with PG deassertion), undervoltage lockout (2.35V), output voltage clamping (5.7V), and load disconnect on disable - all confirmed in the Absolute Maximum Ratings (page 4), Electrical Specifications (page 5), and Functional Description (pages 8–10).
ISL91132IIOZ-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:
- 1.8A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-WLCSP (1.78x1.78)
ISL91132IIOZ-T FAQ
1.How can I place an order for ISL91132IIOZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91132IIOZ-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 ISL91132IIOZ-T reliable?
The price and inventory of ISL91132IIOZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91132IIOZ-T is usually 5 days.
3.What payment methods are accepted for ISL91132IIOZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91132IIOZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91132IIOZ-T?
ISL91132IIOZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91132IIOZ-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 ISL91132IIOZ-T?
For technical support, including ISL91132IIOZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91132IIOZ-T requirements.
6.How does Aetrix verify that ISL91132IIOZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91132IIOZ-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 ISL91132IIOZ-T meets industry standards.
7.What is the process for return or replacement of ISL91132IIOZ-T?
All ISL91132IIOZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91132IIOZ-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 ISL91132IIOZ-T part is unused and in its original packaging.
Return procedure for ISL91132IIOZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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