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Renesas ISL91133IIMZ-T
- Part No.:
- ISL91133IIMZ-T
- Manufacturer:
- Renesas
- Package:
- 16-UFBGA, WLCSP
- Datasheet:
-
ISL91133IIMZ-T.pdf
- Description:
- IC REG BOOST PROG 2.3A 16WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,617
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Product details
Overview
ISL91133IIMZ-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 operates across 2.35V–5.4V input range in smartphones, RF power amplifiers, and USB OTG power sources.
For engineers reviewing the ISL91133IIMZ-T datasheet, ISL91133IIMZ-T pinout, ISL91133IIMZ-T application, or ISL91133IIMZ-T equivalent, this page provides verified technical context, validated pin functions, confirmed fixed-output variants (3.3V/3.5V), real-world efficiency curves, and two rigorously cross-checked alternative parts for battery-powered boost conversion with bypass capability.
Technical Context
The ISL91133IIMZ-T implements valley-current-mode PWM control with internal N- and P-channel MOSFETs (rDS(ON) = 45mΩ/40mΩ), enabling synchronous boost operation up to 2.5MHz. Its dual-mode architecture supports seamless transition between PWM (for heavy loads) and PFM (for light-load efficiency), with automatic or forced bypass entry when VIN approaches VOUT.
Bypass mode uses an independent 38mΩ P-channel MOSFET (Q3) controlled as a current source during startup or reverse-voltage discharge, while separate GND and PGND pins isolate analog and power return paths. Thermal shutdown (150°C) and hiccup-mode overcurrent protection (16-cycle detection) are fully integrated without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.35V to 5.4V - supports full discharge of single-cell Li-ion (2.7V–4.2V) plus headroom for transient spikes. |
| Max Output Current | 2.3A DC at VIN=2.5V/VOUT=3.3V - sufficient for RF PA biasing or USB OTG host power delivery. |
| Switching Frequency | 2.5MHz (typ) - enables use of compact 0.47µH inductors and reduces EMI filtering requirements. |
| Bypass RDS(ON) | 38mΩ - achieves <114mV dropout at 3A, critical for maintaining system voltage during battery sag. |
| Quiescent Current | 45µA in Forced Bypass mode - extends standby time in always-on mobile subsystems. |
| Output Voltage Options | 3.3V / 3.5V (VSEL-controlled) - factory-configured dual-level output for dynamic load compensation. |
| Package | 16-ball WLCSP, 1.78mm × 1.78mm, 0.4mm pitch - ultra-compact footprint for space-constrained mobile PCBs. |
Pinout & Package
ISL91133IIMZ-T is housed in a 16-ball Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch and 1.78mm × 1.78mm body size. The package uses non-solder-mask-defined (NSMD) pads and complies with RoHS and MSL3 reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (A3, A4) | Power input | Primary supply rail (2.35–5.4V); connects to 22µF ceramic capacitor at PGND for low-impedance decoupling. |
| VOUT (B3, B4) | Regulated output | Boost or bypass output node; requires 2×22µF ceramic capacitors to PGND for stability under 2.3A transients. |
| 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 | High-current return path for LX and internal FETs; isolated from analog GND to prevent noise coupling. |
| GND (B2, C2, D1) | Analog ground | Reference for error amplifier, soft-start, and protection circuits; tied to PGND only at single point near IC. |
| EN (A1) | Enable control | Active-high logic input; pulls down to disable device and disconnect load via internal NMOS switch. |
| BYPS (C1) | Bypass mode select | Pull LOW for Forced Bypass (Q3 active, rest disabled); pull HIGH for Auto Bypass (VIN > 1.015×VOUT + 5µs no-switch). |
| VSEL (A4) | Output voltage select | Logic input selecting 3.3V (LOW) or 3.5V (HIGH) output level; used to compensate for load droop in boost mode. |
| PG (A2) | Power-good flag | Open-drain output asserting HIGH when VOUT ≥ 96% of target; deasserts on overtemperature (>120°C) or fault. |
Key Features
| Feature | Design Value |
|---|---|
| Forced & Auto Bypass Modes | 38mΩ integrated P-MOSFET enables <114mV dropout at 3A and eliminates external bypass FETs in portable designs. |
| Valley-Current PWM Control | Internal slope compensation and 4A peak current limit ensure stable regulation across 100mA–2.3A loads without external compensation. |
| PFM/PWM Hybrid Operation | Automatic transition at 300–500mA load threshold maintains >90% efficiency from 100µA to full load. |
| Integrated Protection Suite | Undervoltage lockout (2.35V), thermal warning (120°C), shutdown (150°C), hiccup-mode OCP, and output disconnect on disable. |
| Ultra-Low Quiescent Power | 45µA in Forced Bypass mode extends battery life in always-on sensor or modem subsystems. |
Applications
| Smartphone Power Management | RF Power Amplifier Bias |
|---|---|
Use Scenario: Supplying 3.5V bias to LTE/5G front-end modules during transmit bursts while battery voltage sags from 4.2V to 3.4V. IC Role / Device Role / Timing Role: Boost regulator with auto-bypass fallback - maintains regulated output during voltage dip without interrupting PA operation. Use Value: Eliminates need for separate LDO or discrete bypass FET, reducing BOM count and PCB area by 30% versus discrete solutions. |
Use Scenario: Providing 3.3V/2.3A to 2G/3G/4G RF PAs in baseband processor reference designs. IC Role / Device Role / Timing Role: High-current boost converter with 2.5MHz switching - enables small 0.47µH inductor and tight layout for RF isolation. Use Value: Achieves 96% peak efficiency at 1.5A, reducing thermal load on PA substrate and extending talk time by 8% vs. legacy 1.2MHz regulators. |
| USB OTG Host Power | Tablet PC Core Logic Rail |
Use Scenario: Delivering 5V/1.5A from 3.7V Li-ion battery to USB peripherals during OTG host mode. IC Role / Device Role / Timing Role: Fixed 5V boost regulator (via ISL91133IIQZ variant) with load-disconnect on disable - prevents backfeed into battery. Use Value: Meets USB Battery Charging v1.2 spec with <50mV load regulation error and <200µs response to 1A step load. |
Use Scenario: Generating 3.3V core rail for application processors in thin tablets where battery voltage ranges 3.0–4.35V. IC Role / Device Role / Timing Role: Dual-output-capable regulator using VSEL pin to shift between 3.3V (idle) and 3.5V (active) - compensates for IR drop under 2A load. Use Value: Reduces system-level voltage margin requirement by 150mV, allowing tighter SoC VDD tolerance and lower average power consumption. |
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 3.5A output, no integrated bypass FET - requires external MOSFET and control logic for bypass function. | Suitable for higher-current apps (e.g., LCD bias), but adds complexity and board area for bypass implementation. | Choose when >2.3A continuous output is required and external bypass design is acceptable. |
| MAX77818EWJ+T | PMIC with dual buck-boost + charger; bypass mode implemented via dedicated LDO path, not direct VIN-VOUT connection. | Targets full-system PMIC integration (charging + fuel gauge + multiple rails), not standalone boost+bypass. | Choose when multi-rail power management and battery charging are co-required in same SoC platform. |
Compared with TPS61088RHLR and MAX77818EWJ+T, the ISL91133IIMZ-T uniquely integrates a 38mΩ bypass FET with autonomous mode selection, delivering lowest component count and smallest footprint for single-rail boost+bypass in space-constrained mobile devices.
Availability
ISL91133IIMZ-T is available at Aetrix Electronics and suitable for smartphone power management, RF power amplifier biasing, and USB OTG host power applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant WLCSP packaging.
Supply support for ISL91133IIMZ-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, and timing solutions for automotive, industrial, and consumer electronics.
The ISL91133 product line targets ultra-compact, high-efficiency power conversion in battery-powered mobile devices, emphasizing integrated bypass capability, low quiescent current, and minimal external component count.
FAQ
What output voltage options does the ISL91133IIMZ-T support?
The ISL91133IIMZ-T is factory-configured for dual fixed outputs: 3.3V (VSEL = LOW) or 3.5V (VSEL = HIGH). This VSEL-selectable dual-level output allows dynamic compensation for load-induced voltage droop in boost mode without external feedback resistors. The ISL91133IIMZ-T datasheet specifies ±2% output accuracy across -40°C to +85°C ambient temperature.
How does the ISL91133IIMZ-T enter and exit Forced Bypass mode?
The ISL91133IIMZ-T enters Forced Bypass mode when the BYPS pin is pulled LOW. If VOUT > VIN, it first discharges the output to VIN level via an internal circuit before enabling the 38mΩ bypass FET; if VOUT ≤ VIN, the bypass FET activates immediately. Exit occurs when BYPS is released HIGH, triggering a soft-start sequence. The ISL91133IIMZ-T's BYPS pin has 1.5MΩ internal pull-down resistance.
What is the maximum continuous output current of the ISL91133IIMZ-T?
The ISL91133IIMZ-T delivers up to 2.3A DC output current at VIN = 2.5V and VOUT = 3.3V, as specified in the Absolute Maximum Ratings and Electrical Specifications tables of its FN8680 Rev 1.00 datasheet. Burst current capability reaches 2.5A for pulses <600µs with 4.6ms period, supporting transient RF PA loads without regulation loss.
Does the ISL91133IIMZ-T require external compensation components?
No, the ISL91133IIMZ-T features fully internal compensation for its valley-current-mode PWM control loop. The device operates stably with only an inductor (0.47µH recommended), input capacitor (22µF), and output capacitors (2×22µF) - no external RC networks, compensation pins, or loop-filter components are needed. This simplifies design and improves reliability in high-density mobile layouts.
What protection features are integrated into the ISL91133IIMZ-T?
The ISL91133IIMZ-T integrates undervoltage lockout (2.35V), thermal warning (120°C), thermal shutdown (150°C), hiccup-mode overcurrent protection (16-cycle detection), output disconnect on disable, and open-drain power-good (PG) flag with early fault indication. All protections operate autonomously without external components, ensuring robust operation in battery-powered systems where field reliability is critical.
ISL91133IIMZ-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)
ISL91133IIMZ-T FAQ
1.How can I place an order for ISL91133IIMZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91133IIMZ-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 ISL91133IIMZ-T reliable?
The price and inventory of ISL91133IIMZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91133IIMZ-T is usually 5 days.
3.What payment methods are accepted for ISL91133IIMZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91133IIMZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91133IIMZ-T?
ISL91133IIMZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91133IIMZ-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 ISL91133IIMZ-T?
For technical support, including ISL91133IIMZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91133IIMZ-T requirements.
6.How does Aetrix verify that ISL91133IIMZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91133IIMZ-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 ISL91133IIMZ-T meets industry standards.
7.What is the process for return or replacement of ISL91133IIMZ-T?
All ISL91133IIMZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91133IIMZ-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 ISL91133IIMZ-T part is unused and in its original packaging.
Return procedure for ISL91133IIMZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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