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Renesas ISL91117IIAZ-T
- Part No.:
- ISL91117IIAZ-T
- Manufacturer:
- Renesas
- Package:
- 20-UFBGA, WLCSP
- Datasheet:
-
ISL91117IIAZ-T.pdf
- Description:
- IC REG BOOST ADJ 3.7A 20WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,786
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Product details
Overview
ISL91117IIAZ-T from Renesas Electronics is a high-efficiency synchronous boost converter IC with integrated 4.2A P- and N-channel MOSFETs, 2.6MHz switching frequency, true input-output disconnect, and adjustable output voltage (1.8V–5.95V). It delivers up to 1.5A output current at 3.3V input/5V output and features 35µA no-load quiescent current for battery-powered portable devices including smartphones and USB-OTG peripherals.
For engineers reviewing the ISL91117IIAZ-T datasheet, ISL91117IIAZ-T pinout, ISL91117IIAZ-T application, or ISL91117IIAZ-T equivalent, key selection considerations include its WLCSP-20 package footprint, 2.34mm×1.72mm size, forced-PWM/sync capability, ±2% output voltage accuracy in PWM mode, and thermal shutdown at 150°C with 35°C hysteresis.
Technical Context
The ISL91117IIAZ-T implements peak-current-mode control with internal slope compensation and an error amplifier driving PWM comparators for dual-MOSFET gate drivers. Its architecture integrates separate PVIN (power path) and VIN (bias supply) inputs, independent PGND and GND pins, and a dedicated BLKG terminal for inductor connection-enabling precise power-path isolation and low-noise analog reference stability.
It supports three operating modes: auto PFM (light-load efficiency), forced PWM (fixed-frequency noise control), and external synchronization (2.75–3.25MHz). Protection includes undervoltage lockout (1.725V rising threshold), short-circuit detection via FB monitoring, and thermal shutdown with automatic soft-start recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 4.8V - supports single-cell Li-ion (2.7–4.2V), alkaline/NiMH (1.8–4.8V), and wide-battery-drop applications without pre-regulation. |
| Output Current Capability | 1.5A @ PVIN=3.3V, VOUT=5V - sufficient for USB-OTG host power, HDMI sink rails, and multi-rail PMIC sub-systems. |
| Switching Frequency | 2.4–2.9MHz (typ. 2.6MHz) - enables use of 1µH shielded inductors and ultra-low-profile ceramic capacitors to minimize solution area. |
| Quiescent Current | 35µA (no load, PFM mode) - extends battery runtime in standby and low-duty-cycle IoT/sensor nodes. |
| Output Voltage Accuracy | ±2% (PWM mode, IOUT=0mA) - ensures stable 5V USB compliance and tight regulation for sensitive analog subsystems. |
| Thermal Shutdown Threshold | 150°C (typ.), 35°C hysteresis - prevents latch-up during transient overloads while enabling safe auto-recovery in thermally constrained mobile PCBs. |
| FB Reference Voltage | 0.80V (0.788–0.812V) - allows precise resistor-divider programming of output voltages from 1.8V to 5.95V with minimal drift. |
Pinout & Package
ISL91117IIAZ-T uses a 20-ball Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch, 2.34mm × 1.72mm body size, and RoHS-compliant SnAgCu solder balls. The package supports MSL3 handling per J-STD-020 and features a top-side die pad for thermal conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A5, B5, C5 | VOUT | Boost output node - connects to dual 22µF X5R ceramic capacitors; clamped to 5.95V max for overvoltage protection. |
| A4, B4, C4 | LX | Switching node - connects directly to inductor; rated for -1.5V/100ns and +7V/20ms transients; requires low-inductance layout. |
| A3, B3, C3 | PGND | Power ground - carries high di/dt switching current; must be connected to local input/output capacitor grounds with minimal trace length. |
| A2, B2, C2 | BLKG | Blocking FET source - connects to input side of inductor; enables true input-output disconnect when disabled. |
| A1, B1, C1 | PVIN | Main power input - supplies DC/DC converter stage; requires 22µF ceramic capacitor to PGND for ripple suppression. |
| D1 | VIN | Bias supply input - powers internal references and logic; shares 1.8–4.8V range but must be decoupled separately from PVIN. |
| D2 | EN | Enable logic input - active-high; drives device into shutdown (0.4µA IQ) with internal 120Ω VOUT-to-GND soft-discharge path. |
| D3 | MODE | Mode control/sync input - LOW = forced PWM; HIGH = auto PFM; accepts 2.75–3.25MHz external clock for EMI reduction. |
| D4 | GND | Analog ground - reference for FB, error amp, and internal VREF; must be isolated from PGND except at single-point star ground. |
| D5 | FB | Feedback input - monitors output via resistor divider; 0.80V reference enables adjustable VOUT; bias current ≤0.2µA minimizes divider error. |
Key Features
| Feature | Design Value |
|---|---|
| True input-output disconnect | Internal blocking FET isolates VOUT from PVIN during shutdown - eliminates reverse leakage and preserves battery charge in always-on systems. |
| 2.6MHz fixed-frequency operation | Enables <1mm height solutions using 1µH inductors and 22µF ceramic caps - reduces board area by >40% vs. 500kHz boost converters. |
| 35µA no-load quiescent current | Extends shelf life and standby time in battery-backed sensors and wearables - achieves >90% efficiency at 100µA load. |
| Integrated 90mΩ P-FET / 75mΩ N-FET | Eliminates external power switches - simplifies layout, improves thermal performance, and guarantees matched timing for shoot-through prevention. |
| Programmable output voltage | Resistor-divider-based adjustment from 1.8V to 5.95V - supports diverse rail requirements (USB 5V, HDMI 3.3V, sensor 2.8V) with one BOM item. |
| External clock synchronization | Accepts 2.75–3.25MHz sync signal on MODE pin - enables deterministic EMI placement and coexistence with RF or audio subsystems. |
Applications
| Smartphone Power Management | USB-OTG Host Supply |
|---|---|
Use Scenario: Boosting single-cell Li-ion (3.0–4.2V) to regulated 5V for USB peripheral enumeration and charging. IC Role / Device Role / Timing Role: Primary boost regulator with true disconnect, enabling clean hot-plug insertion and battery isolation during suspend. Use Value: 1.5A output sustains full-speed USB 2.0 data + 500mA charging; 35µA IQ extends standby time beyond 72 hours. |
Use Scenario: Providing 5V/500mA power from a portable media player or tablet to attached USB keyboards, mice, or flash drives. IC Role / Device Role / Timing Role: Standalone OTG power switch with programmable soft-start and load transient response <200µs. Use Value: 2.6MHz switching avoids audible noise in audio-sensitive devices; ±2% VOUT accuracy ensures USB compliance. |
| Portable HDMI Sink Rail | Wireless Audio Transmitter |
Use Scenario: Generating stable 3.3V or 5V from 2-cell alkaline (2.4–3.2V) for HDMI receiver ICs in portable projectors or docking stations. IC Role / Device Role / Timing Role: High-efficiency boost converter with low-noise PFM/PWM transition and feed-forward capacitor support. Use Value: 96% peak efficiency at 1A maintains thermal envelope below 45°C; 22pF C3 stabilizes line/load regulation to ±12.5mV/V. |
Use Scenario: Powering Bluetooth/Wi-Fi SoCs and Class-D amplifiers in battery-operated speakers and earbud chargers. IC Role / Device Role / Timing Role: Compact, low-EMI boost stage synchronized to system clock to avoid interference with 2.4GHz band. Use Value: External sync capability (2.75–3.25MHz) shifts switching harmonics away from critical RF bands; WLCSP-20 eases HDI routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | 5.5V max input, 3.5A switch, 500kHz–2.2MHz adjustable frequency, no true disconnect, larger QFN-20 (4×4mm). | Higher current but lower frequency - better for cost-sensitive industrial apps; unsuitable where 2.6MHz EMI control or VOUT isolation is required. | Select TPS61088RHLR only if >2A output or lower BOM cost is prioritized over size, light-load IQ, and disconnect functionality. |
| MAX77818EWJ+T | Integrated buck-boost + charger, 3.2V–4.4V input, 3A output, 2.2MHz, no standalone boost mode, 32-ball WLP. | System PMIC rather than discrete boost - appropriate for battery-charging + rail-generation integration, not pure boost replacement. | Choose MAX77818EWJ+T when combining charging, fuel gauging, and multiple rails; avoid for simple, low-footprint boost-only use cases. |
Compared with TPS61088RHLR and MAX77818EWJ+T, the ISL91117IIAZ-T offers superior light-load efficiency (35µA vs. 120µA), smaller WLCSP footprint (2.34×1.72mm vs. 4×4mm/2.7×2.7mm), and unique true disconnect - making it optimal for space-constrained, battery-life-critical portable designs requiring clean power sequencing.
Availability
ISL91117IIAZ-T is available at Aetrix Electronics and suitable for smartphone power management, USB-OTG host supply, and portable HDMI sink rail applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant WLCSP packaging.
Supply support for ISL91117IIAZ-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 connectivity solutions for automotive, industrial, and consumer markets.
The ISL91117IIAZ-T belongs to Renesas' high-efficiency portable power management portfolio, designed specifically for compact, battery-powered devices demanding ultra-low quiescent current, small form factor, and robust protection in dynamic load environments.
FAQ
What is the maximum output voltage supported by the ISL91117IIAZ-T?
The ISL91117IIAZ-T supports an output voltage clamp of 5.95V (typical), with programmable output ranging from 1.8V to 5.95V using an external resistor divider. This upper limit ensures compatibility with standard 5V USB and HDMI interfaces while preventing overvoltage damage to downstream circuitry.
Does the ISL91117IIAZ-T require external MOSFETs for boost operation?
No, the ISL91117IIAZ-T integrates both P-channel (90mΩ) and N-channel (75mΩ) power MOSFETs, eliminating the need for external switches. Its fully integrated design reduces component count, PCB area, and layout complexity while guaranteeing matched timing and shoot-through protection.
How does the ISL91117IIAZ-T achieve true input-output disconnect?
The ISL91117IIAZ-T uses an internal blocking FET connected to the BLKG pin. When disabled via EN, this FET opens the path between PVIN and VOUT, ensuring zero reverse current and complete isolation - critical for preserving battery charge in always-on portable systems.
Can the ISL91117IIAZ-T synchronize to an external clock, and what is the acceptable frequency range?
Yes, the ISL91117IIAZ-T accepts an external synchronization signal on the MODE pin within 2.75MHz to 3.25MHz. This feature allows deterministic EMI placement and noise avoidance in RF- or audio-sensitive applications without modifying the internal oscillator.
What is the recommended inductor value and saturation current rating for the ISL91117IIAZ-T?
Renesas recommends a 1µH inductor with ≥4A saturation current rating, low DCR, and high-frequency ferrite core (e.g., Coilcraft XFL4020-102ME). This ensures stable operation across the full 0–1.5A load range while minimizing core losses and radiated emissions.
ISL91117IIAZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 4.8V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 6.5V (Switch)
- Current - Output:
- 3.7A (Switch)
- Frequency - Switching:
- 2.6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WLCSP
ISL91117IIAZ-T FAQ
1.How can I place an order for ISL91117IIAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91117IIAZ-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 ISL91117IIAZ-T reliable?
The price and inventory of ISL91117IIAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91117IIAZ-T is usually 5 days.
3.What payment methods are accepted for ISL91117IIAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91117IIAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91117IIAZ-T?
ISL91117IIAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91117IIAZ-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 ISL91117IIAZ-T?
For technical support, including ISL91117IIAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91117IIAZ-T requirements.
6.How does Aetrix verify that ISL91117IIAZ-T is sourced from the original manufacturer or authorized distributors?
All ISL91117IIAZ-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 ISL91117IIAZ-T meets industry standards.
7.What is the process for return or replacement of ISL91117IIAZ-T?
All ISL91117IIAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL91117IIAZ-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 ISL91117IIAZ-T part is unused and in its original packaging.
Return procedure for ISL91117IIAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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