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Renesas ISL91132IILZ-T
- Part No.:
- ISL91132IILZ-T
- Manufacturer:
- Renesas
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
ISL91132IILZ-T.pdf
- Description:
- IC REG BOOST PROG 1.8A 16WLCSP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL91132IILZ-T from Renesas Electronics is a high-efficiency 1.8A synchronous boost regulator with integrated input-to-output bypass FET, designed for single-cell Li-ion/Li-polymer battery systems. It delivers up to 1.8A at VOUT = 3.3V from VIN = 2.5V, features 38mΩ bypass MOSFET, 2.5MHz switching frequency, and operates across 2.35V–5.4V input range in smartphones and RF power amplifier supplies.
For engineers reviewing the ISL91132IILZ-T datasheet, ISL91132IILZ-T pinout, ISL91132IILZ-T application, or ISL91132IILZ-T equivalent, key selection criteria include its dual-mode operation (boost + forced/auto bypass), ultra-low quiescent current (45µA in Forced Bypass), fixed 3.15V/3.3V output variants, and WLCSP-16 package compatibility with space-constrained portable designs.
Technical Context
The ISL91132IILZ-T implements valley-current-mode PWM control with internal N- and P-channel MOSFETs (rDS(ON) = 45mΩ/40mΩ), plus a dedicated 38mΩ bypass P-channel FET (Q3). Its dual-loop architecture supports seamless transition between boost and bypass modes based on VIN–VOUT differential and BYPS pin state.
It integrates soft-start with two-stage linear current limiting (ILIN1 = 1300mA, ILIN2 = 2400mA), thermal warning (120°C) and shutdown (150°C), overcurrent protection with hiccup mode, and open-drain PG flag asserting at 96% VOUT. The device uses separate GND and PGND pins to isolate analog and high-switching-current return paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.35V to 5.4V - supports full discharge curve of single-cell Li-ion (2.7V–4.2V) and USB OTG inputs. |
| Max Output Current | 1.8A DC at VIN=2.5V, VOUT=3.3V - sufficient for powering 2G/3G/4G RF PAs and baseband ICs. |
| Bypass RDS(ON) | 38mΩ - enables <100mV dropout at 1.5A, critical for maintaining regulation near battery end-of-discharge. |
| Quiescent Current | 45µA in Forced Bypass mode - minimizes standby drain in always-on subsystems like PMIC rails. |
| Switching Frequency | 2.5MHz (typ) - allows use of compact 0.47µH inductors and reduces EMI fundamental frequency. |
| Output Voltage Options | 3.15V / 3.3V (fixed, selected via VSEL pin) - matches common I/O voltage requirements for mobile SoCs and RF front-ends. |
| Package | 16-ball WLCSP, 1.78mm × 1.78mm, 0.4mm pitch - enables direct chip-scale mounting beneath thin PCBs in slim handhelds. |
Pinout & Package
ISL91132IILZ-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 | Supplies internal circuitry and boost/bypass path; requires 22µF ceramic capacitor to PGND. |
| VOUT (B3, B4) | Regulated output | Delivers boosted or bypassed voltage; connects to 22µF output capacitor and load. |
| LX (C3, C4) | Inductor switch node | Connects to 0.47µH inductor; carries high di/dt switching current; must be routed with minimal loop area. |
| PGND (D2, D3, D4) | Power ground | Low-impedance return for LX and bypass FET; separate from analog GND to prevent noise coupling. |
| GND (B2, C2, D1) | Analog ground | Reference for error amplifier, bias circuits, and PG logic; tied to PGND only at single point under IC. |
| EN (A1) | Enable control | Active-high logic input; pulls down to disable regulator and reduce shutdown current to 1.3µA. |
| BYPS (C1) | Bypass mode select | Pull LOW for Forced Bypass (Q2+Q3 on, rest disabled); pull HIGH for Auto Bypass (enters when VIN > VOUT+1.5%). |
| VSEL (A4) | Output voltage select | Pull HIGH for 3.3V (HI), LOW for 3.15V (LO); sets target regulation point in boost mode only. |
| PG (A2) | Power-good flag | Open-drain output asserted HIGH when VOUT ≥ 96% of target; deasserted during overtemp, overcurrent, or undervoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Input-to-output bypass mode | 38mΩ P-channel MOSFET enables <100mV dropout at 1.5A, extending runtime near battery EOD without efficiency penalty. |
| Ultra-low quiescent current | 45µA in Forced Bypass mode reduces system standby power - critical for always-on sensors and modem retention rails. |
| Two-stage soft-start | 1300mA/2400mA linear current limiting prevents output overshoot and inrush damage during power-up with large capacitive loads. |
| Integrated thermal protection | Thermal warning at 120°C and shutdown at 150°C with 20°C hysteresis enable graceful throttling before catastrophic failure. |
| Valley-current-mode PWM | Internal slope compensation and cycle-by-cycle peak/valley current sensing ensure stable regulation across 10mA–1.8A load range. |
Applications
| Smartphone Power Management | RF Power Amplifier Supply |
|---|---|
Use Scenario: Regulating battery voltage to supply application processor I/O rails and display interface circuits during deep discharge. IC Role / Device Role / Timing Role: Primary boost converter with bypass fallback, delivering stable 3.3V from 2.7V–4.2V Li-ion input. Use Value: Extends usable battery capacity by >12% compared to fixed LDO solutions due to 96% peak efficiency and sub-100mV dropout in bypass. | Use Scenario: Providing dynamically adjustable supply to 2G/3G/4G PA stages requiring fast transient response and low-noise regulation. IC Role / Device Role / Timing Role: High-bandwidth boost regulator with PFM/PWM auto-transition and 100µs load-step recovery per Figure 11. Use Value: Maintains PA linearity under burst transmission by limiting VOUT droop to <40mV at 1.5A step (VIN = 2.7V). |
| USB OTG Host Power | Tablet PC Subsystem Rail |
Use Scenario: Acting as VBUS source in USB On-The-Go configurations where host device must supply 5V to peripherals from a 3.7V battery. IC Role / Device Role / Timing Role: Boost converter configured for 5.0V output (via ISL91132IIQZ variant), with load disconnect on disable. Use Value: Enables compliant 500mA VBUS sourcing while meeting USB 2.0 voltage tolerance (4.4–5.25V) across full battery range. | Use Scenario: Powering camera ISP, audio codec, or touch controller in tablets where board space limits discrete DC/DC solutions. IC Role / Device Role / Timing Role: Compact WLCSP-16 regulator delivering 3.15V/3.3V with minimal external components (1 inductor, 2 caps). Use Value: Reduces solution footprint by 40% vs. comparable QFN-based boost ICs, enabling placement under narrow bezels or flex PCBs. |
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 2.2A output, no integrated bypass FET; requires external MOSFET for low-dropout operation. | Suitable for higher-current apps but adds layout complexity and BOM cost for bypass functionality. | Choose when >1.8A output or wider 2.7–12V input is required; avoid if space-constrained bypass is mandatory. |
| MAX8646ETA+ | Fixed 3.3V output only; 1.5A max; 1.2MHz switching; no bypass mode; TQFN-16 package (3mm×3mm). | Lower integration and efficiency (92% peak); lacks auto/forced bypass for battery EOD optimization. | Consider only for legacy designs where pin compatibility with older MAX8646 footprint is essential. |
Compared with TPS61088RHLR and MAX8646ETA+, the ISL91132IILZ-T uniquely combines 1.8A capability, integrated 38mΩ bypass FET, 2.5MHz operation, and WLCSP-16 packaging - making it optimal for next-gen smartphones and compact RF modules where size, efficiency, and battery-endurance are co-optimized.
Availability
ISL91132IILZ-T is available at Aetrix Electronics and suitable for smartphone power management, RF power amplifier supply, and USB OTG host applications requiring stable component supply across high-volume production cycles.
Supply support for ISL91132IILZ-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 for automotive, industrial, infrastructure, and IoT applications.
The ISL91132 product line targets portable battery-powered systems, specifically optimizing power conversion efficiency and physical footprint for smartphones, tablets, and wireless communication devices operating from single-cell Li-ion sources.
FAQ
What output voltages does the ISL91132IILZ-T support?
The ISL91132IILZ-T supports two fixed output voltages: 3.15V (VSEL = LOW) and 3.3V (VSEL = HIGH). These are factory-set options within the ISL91132 family; the IILZ-T variant is specifically marked for 3.15V/3.3V selection. No external feedback resistors are required, and the VSEL pin must be hard-wired to GND or VIN to fix the output level during operation.
How does the ISL91132IILZ-T enter and exit Forced Bypass mode?
The ISL91132IILZ-T enters Forced Bypass mode when the BYPS pin is pulled LOW. If VOUT > VIN, it first discharges VOUT to VIN level using an internal circuit before engaging the 38mΩ bypass FET. Exit occurs automatically when BYPS is released HIGH, triggering a controlled transition back to boost mode with soft-start sequencing. This behavior is documented in Figures 20–21 of the FN8637 datasheet.
What is the purpose of separate GND and PGND pins on the ISL91132IILZ-T?
The ISL91132IILZ-T uses separate analog GND (B2, C2, D1) and power PGND (D2, D3, D4) pins to isolate sensitive reference and error amplifier circuitry from high di/dt switching currents. This separation prevents ground bounce from corrupting regulation accuracy and improves noise immunity - a requirement explicitly stated in the "Functional Description" section (page 8) of the ISL91132 datasheet.
Does the ISL91132IILZ-T support automatic load-disconnect when disabled?
Yes, the ISL91132IILZ-T provides true load disconnect when disabled: pulling EN LOW shuts down all internal circuitry and turns off both boost and bypass FETs, blocking reverse current flow from VOUT to VIN. This feature is confirmed in the "Features" list (page 1) and "Functional Description" (page 8), ensuring zero standby leakage and safe hot-swap capability.
What inductor value is recommended for the ISL91132IILZ-T?
A 0.47µH shielded ferrite inductor with ≥3A saturation current rating is recommended for the ISL91132IILZ-T, as specified in the "Inductor Selection" section (page 10) of FN8637. Example vendors include TDK (TFM201610A), TOKO (DFE201610R), and Cyntec (PIFE32251B). Lower DCR improves efficiency; toroidal or shielded construction minimizes radiated EMI.
ISL91132IILZ-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)
ISL91132IILZ-T FAQ
1.How can I place an order for ISL91132IILZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91132IILZ-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 ISL91132IILZ-T reliable?
The price and inventory of ISL91132IILZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91132IILZ-T is usually 5 days.
3.What payment methods are accepted for ISL91132IILZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91132IILZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91132IILZ-T?
ISL91132IILZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91132IILZ-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 ISL91132IILZ-T?
For technical support, including ISL91132IILZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91132IILZ-T requirements.
6.How does Aetrix verify that ISL91132IILZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91132IILZ-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 ISL91132IILZ-T meets industry standards.
7.What is the process for return or replacement of ISL91132IILZ-T?
All ISL91132IILZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91132IILZ-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 ISL91132IILZ-T part is unused and in its original packaging.
Return procedure for ISL91132IILZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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