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Renesas ISL91134IIQZ-T
- Part No.:
- ISL91134IIQZ-T
- Manufacturer:
- Renesas
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
ISL91134IIQZ-T.pdf
- Description:
- IC REG BOOST PROG 2.3A 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,148
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Product details
Overview
ISL91134IIQZ-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-powered systems. It delivers 5V fixed output at up to 1.8A (VIN = 3V), features 2.5MHz switching frequency, 38mΩ bypass MOSFET, and operates across 2.35V–5.4V input range in smartphones, USB OTG power sources, and RF PA supplies.
For engineers reviewing the ISL91134IIQZ-T datasheet, ISL91134IIQZ-T pinout, ISL91134IIQZ-T application, or ISL91134IIQZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed efficiency curves (up to 96%), real-world bypass transition behavior, and two rigorously cross-checked alternative parts for 5V boost-with-bypass use cases.
Technical Context
The ISL91134IIQZ-T implements valley-current-mode PWM control with internal N- and P-channel MOSFETs (rDSON = 45mΩ/40mΩ) and supports seamless mode transitions between 2.5MHz PWM, PFM at light load, and forced/auto bypass. Its dual-stage soft-start (ILIN1 = 550mA, ILIN2 = 1100mA) prevents startup faults under heavy capacitive loads.
Bypass operation uses an independent 38mΩ P-channel MOSFET (Q3) controlled via BYPS pin or VIN–VOUT hysteresis (100mV), enabling <300mV dropout while maintaining load disconnect and reverse leakage protection (<1µA). Thermal shutdown (150°C) and hiccup-mode overcurrent protection (16-cycle detection) are fully integrated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 1.8A DC at VIN = 3V, VOUT = 5V - supports full-power USB OTG and RF PA bias without external current boosting |
| Switching frequency | 2.5MHz (typ) - enables use of 0.47µH inductor and compact 22µF ceramic caps, reducing solution footprint by >40% vs 1MHz designs |
| Bypass RDS(ON) | 38mΩ - achieves <68mV dropout at 1.8A, critical for maintaining 5V rail stability during battery voltage sag |
| Quiescent current | 45µA in Forced Bypass Mode - extends standby time in always-on mobile peripherals |
| Input voltage range | 2.35V to 5.4V - covers full discharge-to-charge profile of single-cell Li-ion (2.7V–4.4V) plus USB input margin |
| Efficiency peak | 96% at VOUT = 5V, IOUT = 1A, VIN = 3.6V - minimizes thermal stress in sealed handheld enclosures |
| Protection features | Integrated OCP (hiccup mode), OTP (150°C shutdown), UVLO (2.35V rising), and load disconnect - eliminates need for external fault management circuitry |
Pinout & Package
ISL91134IIQZ-T is housed in a 16-ball, 0.4mm pitch, 1.78mm × 1.78mm WLCSP (Package Drawing W4x4.16E), optimized for ultra-thin mobile PCBs with minimal thermal resistance (θJA = 70°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (A3, A4) | Power input | Accepts 2.35–5.4V; requires local 22µF X5R ceramic cap to PGND for low-impedance supply during boost/bypass transitions |
| VOUT (B3, B4) | Regulated output | 5V fixed output; connects to 22µF output capacitor and system load; clamped at 5.7V max to protect downstream ICs |
| LX (C3, C4) | Inductor switch node | Drives external 0.47µH inductor; carries high di/dt switching current - must be routed short and wide to minimize EMI |
| PGND (D2, D3, D4) | Power ground | High-current return path for LX and bypass FET; isolated from analog GND to prevent noise coupling into error amplifier |
| GND (B2, C2, D1) | Analog ground | Reference for feedback, EN, VSEL, BYPS; tied to PGND only at single point near IC to avoid ground bounce |
| EN (A1) | Enable control | Active-high logic input; pulls down internally when disabled to ensure complete shutdown and <5µA shutdown current |
| BYPS (C1) | Bypass mode select | Pull LOW for forced bypass (Q3 on, rest disabled); pull HIGH for auto-bypass (enters when VIN ≥ VOUT + 100mV for 5µs) |
| VSEL (A2) | Output voltage offset | Selects VOUT HI (5.2V) or LO (5.0V) to compensate for load transient droop - tied HIGH or LOW, not floating |
| PG (A2) | Power-good flag | Open-drain output asserted when VOUT ≥ 96% of target; deasserted during thermal warning (120°C), OCP, or startup fault |
Key Features
| Feature | Design Value |
|---|---|
| Input-to-output bypass with 38mΩ switch | Enables sub-100mV dropout at 1.5A, extending usable battery life during high-load bursts without efficiency penalty |
| 2.5MHz valley-current-mode PWM | Reduces inductor size by 4× vs 600kHz designs and improves transient response with fixed 75% initial duty cycle |
| Dual-stage linear soft-start (550mA/1100mA) | Prevents startup faults under large output capacitance (>100µF), eliminating need for external soft-start timing components |
| Integrated load disconnect and reverse leakage control | Blocks backfeed from VOUT to VIN when disabled (ILEAK < 1µA), protecting battery during system sleep or failure |
| Auto and forced bypass mode selection | Allows system firmware (forced) or autonomous hardware (auto) control of conduction path - no external logic required |
Applications
| Smartphone Power Management | USB OTG Host Supply |
|---|---|
Use Scenario: Powers USB peripherals (keyboard, flash drive) from smartphone battery during OTG host mode. IC Role / Device Role / Timing Role: Boost regulator with bypass - maintains stable 5V rail as battery voltage drops from 4.2V to 3.0V. Use Value: 96% peak efficiency and 45µA bypass quiescent current extend accessory runtime by >25% vs legacy 1MHz boosters. |
Use Scenario: Supplies regulated 5V to USB Type-C accessories in portable media players and tablets. IC Role / Device Role / Timing Role: High-current boost converter with fast load-step response (1000mA step in <100µs) and auto-bypass entry. Use Value: 1.8A capability and 38mΩ bypass enable direct connection to USB VBUS without external LDO, reducing BOM count. |
| 2G/3G/4G RF Power Amplifier Bias | Portable Medical Sensor Hub |
Use Scenario: Provides clean, low-noise 5V bias to cellular RF PAs during transmission bursts. IC Role / Device Role / Timing Role: Synchronous boost with PFM/PWM seamless transition - maintains regulation during 10–500mA dynamic load swings. Use Value: 2.5MHz switching pushes noise above sensitive RF bands; integrated soft-start prevents PA turn-on glitches. |
Use Scenario: Powers mixed-signal sensor interface (ADC, BLE radio, display) from coin-cell or Li-ion in wearable diagnostics. IC Role / Device Role / Timing Role: Ultra-low-IQ boost-with-bypass - sustains 5V rail during intermittent BLE advertising (10ms active, 1s sleep). Use Value: 45µA forced bypass IQ reduces average system current by 60% vs always-on boost, extending battery life to >12 months. |
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 | Fixed 5V output; no bypass mode; 2.2MHz switching; higher IQ (100µA in shutdown) | Lacks input-to-output bypass - requires external ideal diode or LDO for low-dropout operation | Choose when board space allows discrete bypass solution and cost sensitivity outweighs efficiency gain |
| MAX77818EWJ+T | 5V/3A boost; integrated fuel gauge and I2C control; 2.1MHz; no dedicated bypass FET | Supports programmable output and telemetry but adds complexity and footprint vs standalone function | Choose when system-level battery monitoring and dynamic voltage scaling are required alongside boost |
Compared with ISL91134IIQZ-T, TPS61088RHLR lacks bypass functionality and increases dropout losses above 3.8V input, while MAX77818EWJ+T adds telemetry overhead and larger 32-pin WLP package - ISL91134IIQZ-T remains optimal for minimal-footprint, high-efficiency 5V boost-with-hardware-bypass designs.
Availability
ISL91134IIQZ-T is available at Aetrix Electronics and suitable for smartphone power management, USB OTG host supplies, and RF power amplifier biasing requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability in high-volume production.
Supply support for ISL91134IIQZ-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 delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and consumer markets, with emphasis on energy efficiency and system integration.
The ISL91134 product line targets ultra-compact, high-efficiency power conversion in battery-constrained mobile devices, specifically addressing the need for seamless boost-to-bypass transitions without external components.
FAQ
What is the maximum continuous output current of the ISL91134IIQZ-T?
The ISL91134IIQZ-T delivers up to 1.8A DC output current when VIN = 3V and VOUT = 5V, as specified in the datasheet's Recommended Operating Conditions table. This rating assumes proper PCB layout, thermal management, and use of the recommended 0.47µH inductor with ≥3A saturation current. Derating applies at higher ambient temperatures or lower input voltages.
Does the ISL91134IIQZ-T support automatic transition between boost and bypass modes?
Yes, the ISL91134IIQZ-T supports Auto Bypass Mode: when the BYPS pin is pulled HIGH, the device automatically enters bypass if VIN exceeds VOUT by ≥100mV for 5µs with no switching activity. This hardware-based transition requires no firmware intervention and is confirmed in Figures 13–14 and the Functional Description section of the datasheet.
What is the purpose of the VSEL pin on the ISL91134IIQZ-T?
The VSEL pin on the ISL91134IIQZ-T selects between two output voltage levels: pulling VSEL HIGH sets VOUT to 5.2V, while pulling it LOW sets VOUT to 5.0V. This offset compensates for load transient droop in high-current applications like USB OTG, and is explicitly defined in the Pin Descriptions table on page 3 of FN8678 Rev.2.00.
How does the ISL91134IIQZ-T handle short-circuit conditions on the output?
Under short-circuit, the ISL91134IIQZ-T reduces PWM oscillator frequency to limit power dissipation while maintaining N-channel MOSFET peak current limiting. If VOUT falls below the clamp threshold, the device enters hiccup mode - disabling switching for ~20ms, then attempting soft-start. This behavior is documented in the "Short-Circuit Protection" subsection on page 8 of FN8678 Rev.2.00.
What package type and dimensions does the ISL91134IIQZ-T use?
The ISL91134IIQZ-T uses a 16-ball, 0.4mm pitch, 1.78mm × 1.78mm Wafer-Level Chip-Scale Package (WLCSP) per Package Drawing W4x4.16E. This RoHS-compliant package features non-solder-mask-defined (NSMD) pads and is rated MSL3 per J-STD-020, as confirmed in the Ordering Information table on page 3 of FN8678 Rev.2.00.
ISL91134IIQZ-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)
ISL91134IIQZ-T FAQ
1.How can I place an order for ISL91134IIQZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91134IIQZ-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 ISL91134IIQZ-T reliable?
The price and inventory of ISL91134IIQZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91134IIQZ-T is usually 5 days.
3.What payment methods are accepted for ISL91134IIQZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91134IIQZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91134IIQZ-T?
ISL91134IIQZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91134IIQZ-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 ISL91134IIQZ-T?
For technical support, including ISL91134IIQZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91134IIQZ-T requirements.
6.How does Aetrix verify that ISL91134IIQZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91134IIQZ-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 ISL91134IIQZ-T meets industry standards.
7.What is the process for return or replacement of ISL91134IIQZ-T?
All ISL91134IIQZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91134IIQZ-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 ISL91134IIQZ-T part is unused and in its original packaging.
Return procedure for ISL91134IIQZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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