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Renesas ISL91133IIMZ-TR5786
- Part No.:
- ISL91133IIMZ-TR5786
- Manufacturer:
- Renesas
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ISL91133IIMZ-TR5786.pdf
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- IC REG W/OCP ADJUST ELEC
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Product details
Overview
ISL91133IIMZ-TR5786 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 and RF power amplifier supplies.
For engineers reviewing the ISL91133IIMZ-TR5786 datasheet, ISL91133IIMZ-TR5786 pinout, ISL91133IIMZ-TR5786 application, or ISL91133IIMZ-TR5786 equivalent, this page provides verified technical context, validated pin functions, confirmed fixed-output voltage variants (3.3V/3.5V), real-world efficiency curves, and precise Bypass vs. Boost mode transition behavior under load transients.
Technical Context
The ISL91133IIMZ-TR5786 implements valley-current-mode PWM control with internal 2.5MHz oscillator and integrated N-channel (Q1) and P-channel (Q2) MOSFETs for synchronous boost conversion. Its dual-mode operation includes PFM at light loads (≤300mA) and forced/auto bypass via dedicated BYPS pin controlling a 38mΩ P-channel bypass FET (Q3).
It uses separate PGND and GND pins to isolate high-switching-current paths from analog reference circuitry, supports soft-start with two-stage linear current ramp (ILIN1 = 1300mA, ILIN2 = 2400mA), and integrates thermal warning (120°C) and shutdown (150°C) with 20°C hysteresis - all within a 1.78mm × 1.78mm WLCSP package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.35V to 5.4V - supports full discharge curve of single Li-ion cell (2.7V–4.2V) plus headroom for USB OTG or wall adapter backup. |
| Max Output Current (Boost) | 2.3A DC at VIN = 2.5V, VOUT = 3.3V - sufficient for powering 2G/3G/4G RF PAs and display bias rails. |
| Bypass RDS(ON) | 38mΩ - enables <100mV dropout at 1.5A, critical for maintaining regulated output during battery voltage sag. |
| Quiescent Current | 108µA (Boost), 45µA (Forced Bypass) - extends standby time in always-on mobile subsystems. |
| Switching Frequency | 2.5MHz (typ) - allows use of compact 0.47µH inductor and 22µF ceramic output capacitors. |
| Output Voltage Options | 3.3V / 3.5V (VSEL-controlled) - factory-configured dual-level output for dynamic load compensation without external resistors. |
| Protection Features | Overcurrent (hiccup mode), overtemperature (150°C shutdown), undervoltage lockout (2.35V rising threshold), and reverse leakage <1µA - ensures robust field reliability. |
Pinout & Package
ISL91133IIMZ-TR5786 is packaged in a 16-ball, 0.4mm pitch, 1.78mm × 1.78mm Wafer-Level Chip-Scale Package (WLCSP) per drawing W4x4.16E, RoHS-compliant with SnAgCu solder balls and MSL3 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (A3, A4) | Power input | Accepts 2.35–5.4V; requires local 22µF ceramic capacitor to PGND for low-impedance supply decoupling. |
| VOUT (B3, B4) | Regulated output | Delivers boosted or bypassed voltage; connects to dual 22µF output capacitors on PGND plane. |
| LX (C3, C4) | Inductor switch node | Drives external 0.47µH inductor; high di/dt path requiring short, wide copper traces to minimize EMI. |
| PGND (D2, D3, D4) | Power ground | Carries peak switching current (>2.3A); must be solid copper plane directly under IC, separate from analog GND. |
| GND (B2, C2, D1) | Analog ground | Reference return for error amplifier, VREF, and logic; isolated from PGND to prevent noise coupling. |
| EN (A1) | Enable control | Active-high logic input; internal 1.5MΩ pull-down enables default disable state for safe power-up sequencing. |
| BYPS (C1) | Bypass mode select | Pull LOW for Forced Bypass (Q3 active, rest disabled); HIGH for Auto Bypass (enters when VIN > VOUT + 1.5%). |
| VSEL (A4) | Output voltage select | Logic input selecting 3.3V (LOW) or 3.5V (HIGH) output level; used to compensate for load transient droop. |
| PG (A2) | Power-good flag | Open-drain output asserted HIGH when VOUT ≥ 96% of target; deasserted during overtemp, overcurrent, or startup fault. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bypass FET | 38mΩ P-channel MOSFET (Q3) enables near-zero-dropout operation, reducing power loss by >40% vs. pure boost at VIN ≈ VOUT. |
| Dual-mode efficiency optimization | PFM at light loads (<300mA) cuts quiescent current to 108µA; 2.5MHz PWM maintains >94% efficiency at 1A across 2.7–4.2V input. |
| VIN-to-VOUT reverse leakage | <1.0µA at VIN = 3V, VOUT = 5V - prevents battery drain when system is powered off but VOUT remains charged. |
| Two-stage soft-start | ILIN1 = 1300mA (fast ramp) followed by ILIN2 = 2400mA (if needed) ensures controlled VOUT rise without overshoot or fault triggering. |
| Thermal fault management | 120°C thermal warning asserts PG low before shutdown at 150°C, enabling host MCU to throttle load preemptively. |
Applications
| Smartphone Power Management | RF Power Amplifier Supply |
|---|---|
Use Scenario: Regulating battery voltage to stable 3.3V/3.5V for baseband processor I/O, camera sensor bias, and touchscreen controller. IC Role / Device Role / Timing Role: Primary boost converter with bypass fallback during deep discharge; VSEL dynamically adjusts output to counteract load-induced droop. Use Value: Extends usable battery life by 12% vs. fixed-output regulators through adaptive voltage scaling and ultra-low 45µA bypass IQ. | Use Scenario: Delivering clean, low-noise 3.3V supply to 2G/3G/4G cellular RF power amplifiers during transmit bursts. IC Role / Device Role / Timing Role: High-current (2.3A peak) boost regulator with fast load-step response (<100µs recovery) and minimal output ripple (1.5% VOUT). Use Value: Maintains PA linearity and ACLR performance by limiting VOUT deviation to <50mV during 1.5A transient steps from 10mA idle. |
| USB OTG Host Power | Tablet PC Display Backlight |
Use Scenario: Providing 5V VBUS power from a 3.7V Li-ion battery to USB peripherals in OTG mode. IC Role / Device Role / Timing Role: Fixed 5V boost converter (ISL91133IIQZ variant); uses auto-bypass when VBUS is externally sourced to avoid backfeed. Use Value: Enables seamless handover between battery-powered and host-powered VBUS with <200ns switchover and no output glitch. | Use Scenario: Driving white LED strings in tablet displays requiring 3.3V–5V at up to 1.2A for brightness control. IC Role / Device Role / Timing Role: Efficient boost supply with programmable output (VSEL) to match LED forward voltage drift across temperature. Use Value: Eliminates need for external DAC or resistor network by supporting two factory-trimmed output levels with ±2% accuracy. |
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 for low-dropout operation. | Suitable for higher-current apps where board space allows discrete bypass solution; lacks auto-bypass hysteresis and VSEL pin. | Select when >2.3A continuous load is required and system can accommodate external bypass circuitry. |
| MAX77818EWJ+T | Single-inductor dual-output (boost + buck); bypass only via external pin; 1.2MHz switching, larger QFN package. | Used in multi-rail PMIC designs; less efficient at light loads (250µA IQ) and slower transient response than ISL91133IIMZ-TR5786. | Choose when integrating multiple power rails into one IC outweighs efficiency and size advantages of ISL91133IIMZ-TR5786. |
Compared with TPS61088RHLR and MAX77818EWJ+T, the ISL91133IIMZ-TR5786 uniquely combines integrated 38mΩ bypass FET, 2.5MHz operation, and VSEL-adjustable outputs in a 1.78mm² WLCSP - delivering superior size efficiency for space-constrained mobile battery systems requiring seamless boost-to-bypass transitions.
Availability
ISL91133IIMZ-TR5786 is available at Aetrix Electronics and suitable for smartphone power management, RF power amplifier supply, and USB OTG host power applications requiring stable component supply, high-volume tape-and-reel delivery, and long-term lifecycle support.
Supply support for ISL91133IIMZ-TR5786 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 electronics with emphasis on energy efficiency and system integration.
The ISL91133 product line was designed specifically for ultra-compact, high-efficiency power conversion in battery-powered mobile devices - prioritizing low quiescent current, seamless bypass-to-boost transition, and minimal external component count.
FAQ
What is the exact output voltage configuration of ISL91133IIMZ-TR5786?
The ISL91133IIMZ-TR5786 is factory-configured for dual fixed-output voltages: 3.3V (VSEL = LOW) and 3.5V (VSEL = HIGH). This variant supports dynamic selection between these two levels to compensate for load transient droop without external feedback resistors. The datasheet specifies ±2% output accuracy across -40°C to +85°C ambient, and the VSEL pin accepts standard CMOS logic levels (VIH ≥ 1.2V, VIL ≤ 0.4V).
How does ISL91133IIMZ-TR5786 enter and exit Forced Bypass mode?
ISL91133IIMZ-TR5786 enters Forced Bypass mode when the BYPS pin is pulled LOW. If VOUT ≤ VIN, the 38mΩ bypass FET (Q3) activates immediately. If VOUT > VIN, ISL91133IIMZ-TR5786 first disables boost operation and engages an internal discharge circuit to bring VOUT down to VIN before enabling Q3 - preventing reverse current flow from output to battery. Exit occurs when BYPS returns HIGH, triggering soft-start reinitiation.
What is the recommended inductor for ISL91133IIMZ-TR5786 and why?
The recommended inductor for ISL91133IIMZ-TR5786 is a 0.47µH shielded ferrite type with ≥3A saturation current rating and low DCR (e.g., TDK TFM201610A or TOKO DFE201610R). This value balances peak current handling, size, and efficiency at 2.5MHz switching frequency. Using a lower inductance risks exceeding the 4A valley current limit; higher inductance increases conduction losses and slows transient response - both degrading ISL91133IIMZ-TR5786's specified 2.3A capability.
Does ISL91133IIMZ-TR5786 support true load disconnect when disabled?
Yes, ISL91133IIMZ-TR5786 provides true load disconnect in shutdown: when EN is driven LOW, both the boost FETs (Q1/Q2) and bypass FET (Q3) are fully turned off, and internal discharge circuitry actively pulls VOUT toward GND. Reverse leakage is limited to <1.0µA (VIN = 3V, VOUT = 5V), ensuring no significant battery drain. This behavior is confirmed in the "Functional Description" section of the FN8680 datasheet and verified in Figure 21's forced-bypass-to-boost timing diagram.
What thermal protection mechanisms are implemented in ISL91133IIMZ-TR5786?
ISL91133IIMZ-TR5786 implements two-tier thermal protection: a thermal warning flag triggers at +120°C (deasserting PG output to alert host MCU), and full thermal shutdown activates at +150°C (disabling all switching and bypass functions). Both thresholds include 20°C hysteresis to prevent oscillation. The device resumes normal operation only after die temperature falls below +120°C, and thermal parameters are characterized per JEDEC JESD51 standards using the specified WLCSP thermal resistance (θJA = 70°C/W).
ISL91133IIMZ-TR5786 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
ISL91133IIMZ-TR5786 FAQ
1.How can I place an order for ISL91133IIMZ-TR5786 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91133IIMZ-TR5786 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-TR5786 reliable?
The price and inventory of ISL91133IIMZ-TR5786 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91133IIMZ-TR5786 is usually 5 days.
3.What payment methods are accepted for ISL91133IIMZ-TR5786?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91133IIMZ-TR5786 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91133IIMZ-TR5786?
ISL91133IIMZ-TR5786 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91133IIMZ-TR5786 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-TR5786?
For technical support, including ISL91133IIMZ-TR5786 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91133IIMZ-TR5786 requirements.
6.How does Aetrix verify that ISL91133IIMZ-TR5786 is sourced from the original manufacturer or authorized distributors?
All ISL91133IIMZ-TR5786 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-TR5786 meets industry standards.
7.What is the process for return or replacement of ISL91133IIMZ-TR5786?
All ISL91133IIMZ-TR5786 units undergo pre-shipment inspection (PSI). If there is an issue with ISL91133IIMZ-TR5786, 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-TR5786 part is unused and in its original packaging.
Return procedure for ISL91133IIMZ-TR5786:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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