My Inquiry
My Account
Renesas ISL91117IIAZ-T7A
- Part No.:
- ISL91117IIAZ-T7A
- Manufacturer:
- Renesas
- Package:
- 20-UFBGA, WLCSP
- Datasheet:
-
ISL91117IIAZ-T7A.pdf
- Description:
- IC REG BOOST ADJ 3.7A 20WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:250
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL91117IIAZ-T7A from Renesas Electronics is a synchronous boost DC-DC converter IC designed for battery-powered portable electronics. It delivers up to 1.5A output current at 5V from a 3.3V input, features true input-output disconnect, 2.6MHz switching frequency, and 35µA no-load quiescent current-enabling compact, high-efficiency power supply solutions in smartphones and USB-OTG devices.
For engineers reviewing the ISL91117IIAZ-T7A datasheet, ISL91117IIAZ-T7A pinout, ISL91117IIAZ-T7A application, or ISL91117IIAZ-T7A equivalent, key selection considerations include its 20-ball WLCSP package, adjustable output via external resistor divider, forced-PWM/sync capability, and integrated short-circuit, over-temperature, and UVLO protection.
Technical Context
The ISL91117IIAZ-T7A implements peak-current-mode control with internal slope compensation and dual MOSFET drivers (75mΩ N-channel and 90mΩ P-channel). Its architecture supports seamless transition between PFM (for light-load efficiency) and PWM (for noise-sensitive stability), with programmable mode selection via the MODE pin.
It employs separate PVIN and VIN inputs: PVIN powers the power stage while VIN supplies the analog reference and control circuitry, enabling stable regulation across wide input ranges (1.8V–4.8V). Dedicated PGND and GND pins isolate high-switching-current paths from sensitive analog ground.
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 multi-cell configurations without external LDO pre-regulation. |
| Max Output Current | 1.5A at VOUT = 5V, PVIN = 3.3V - sufficient to power USB-OTG peripherals, HDMI transmitters, and RF front-ends directly from battery. |
| Switching Frequency | 2.4–2.9MHz (typ. 2.6MHz) - enables use of ultra-small 1µH inductors and low-profile ceramic capacitors, minimizing total solution footprint. |
| Quiescent Current | 35µA (no load) - extends battery runtime in standby or low-activity states (e.g., sensor wake-up intervals, display sleep). |
| Output Disconnect | True input-output isolation when disabled - prevents battery drain through load leakage paths, critical for always-on system rails. |
| FB Reference Voltage | 0.80V ±12mV - enables precise output programming (e.g., 5V via 320k/60.4k divider) with minimal error contribution from resistor tolerance. |
| Thermal Shutdown | 150°C (typ.) with 35°C hysteresis - provides robust overtemperature recovery without latch-up, supporting sustained operation in thermally constrained enclosures. |
Pinout & Package
ISL91117IIAZ-T7A uses a 20-ball Wafer-Level Chip-Scale Package (WLCSP) measuring 2.34mm × 1.72mm with 0.4mm pitch. The package is RoHS-compliant, MSL3, and optimized for high-density portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (A5, B5, C5) | Boost output node | Delivers regulated output; requires dual 22µF ceramic capacitors to PGND for low-ESR filtering and transient response. |
| LX (A4, B4, C4) | Power switch node | Connects to inductor; carries high di/dt switching current; must be routed with minimal loop area to reduce EMI. |
| PGND (A3, B3, C3) | Power ground return | Carries high pulsed currents from LX and VOUT; requires dedicated low-impedance copper pour under IC body. |
| BLKG (A2, B2, C2) | Blocking FET source | Connects to input side of inductor; forms high-side switch path; ties to PVIN during off-time for reverse current blocking. |
| PVIN (A1, B1, C1) | Main power input | Supplies boost power stage; accepts 1.8–4.8V; requires local 22µF ceramic capacitor to PGND for ripple suppression. |
| VIN (D1) | Analog supply input | Powers internal reference and control logic; must be decoupled separately to avoid noise coupling into FB path. |
| EN (D2) | Enable control | Active-high logic input; asserts soft-start on rising edge; pulls internal discharge resistor (120Ω) to GND when low. |
| MODE (D3) | Operation mode control | Configures PFM (HIGH), forced-PWM (LOW), or external sync (2.75–3.25MHz clock); voltage-limited to VIN. |
| GND (D4) | Analog ground reference | Reference for FB, error amp, and internal circuits; must be isolated from PGND except at single-point star connection. |
| FB (D5) | Feedback input | Senses output voltage via resistor divider; 0.80V reference enables accurate adjustable output; requires guard ring and proximity to IC. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode, reducing conduction loss and improving full-load efficiency up to 96% at 5V/1.5A. |
| True output disconnect | Internal P-channel FET blocks reverse current flow when disabled, preventing battery discharge through downstream loads. |
| 2.6MHz fixed-frequency PWM | Enables use of sub-1mm height inductors and 0402/0603 MLCCs, shrinking total solution size below 25mm². |
| PFM/PWM auto-transition | Switches seamlessly at ~75mA (PWM→PFM) and ~200mA (PFM→PWM), optimizing efficiency across 0–1.5A load range. |
| Integrated protection suite | Includes undervoltage lockout (1.65V fall), thermal shutdown (150°C), and short-circuit detection-no external fault management required. |
Applications
| Smartphone Power Rail | USB-OTG Host Supply |
|---|---|
|
Use Scenario: Generating 5V rail from single-cell Li-ion (3.0–4.2V) to power USB peripherals during host mode operation. IC Role / Device Role / Timing Role: Primary boost regulator providing regulated 5V output with fast transient response to handle plug-in events. Use Value: Delivers 1.5A peak current with <20mV load transient deviation, ensuring stable enumeration and data transfer without brownout. |
Use Scenario: Enabling USB On-The-Go functionality in tablets where the device acts as host for keyboards, storage, or audio interfaces. IC Role / Device Role / Timing Role: Standalone boost converter with enable-controlled output disconnect to meet USB Battery Charging v1.2 power delivery requirements. Use Value: True input-output disconnect eliminates standby current draw, extending tablet battery life during OTG idle periods. |
| Portable HDMI Transmitter | Wireless Audio Module Supply |
|
Use Scenario: Powering HDMI transmitter ICs (e.g., TFP410) requiring clean 5V from 3.3V system rail or battery. IC Role / Device Role / Timing Role: High-frequency boost converter synchronized to system clock via MODE pin to avoid beat frequencies with video timing. Use Value: 2.6MHz switching and forced-PWM mode suppress audible noise and EMI in high-resolution video signal paths. |
Use Scenario: Supplying 5V to Bluetooth/Wi-Fi SoCs and Class-D amplifiers in wireless speakers and earbuds. IC Role / Device Role / Timing Role: Efficient mid-rail generator supporting dynamic load steps from 10mA (idle) to 800mA (audio playback). Use Value: 35µA quiescent current and PFM mode extend battery runtime by >30% versus conventional PWM-only boost converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher max output current (3.8A), wider input (2.7–12V), but larger 16-pin QFN package (3mm×3mm) and 500kHz–2.2MHz frequency range. | Better suited for higher-power industrial or automotive auxiliary rails; less optimal for space-constrained mobile designs. | Choose TPS61088RHLR when >1.5A output or >4.8V input is required; ISL91117IIAZ-T7A remains preferred for ultra-compact, low-IQ portable applications. |
| MAX17222ELT+T | Lower IQ (1.3µA), smaller 6-bump WLP (1.22mm×0.83mm), but limited to 0.5A output and fixed 3.3V/5V options-no adjustable output. | Ideal for always-on sensor nodes or wearables needing nanoamp standby; lacks flexibility for variable-voltage systems. | Choose MAX17222ELT+T only for fixed-output, ultra-low-power micro-rails; ISL91117IIAZ-T7A is necessary when adjustable 5V+ and 1.5A capability are mandatory. |
Compared with TPS61088RHLR and MAX17222ELT+T, the ISL91117IIAZ-T7A uniquely balances ultra-small WLCSP footprint, 1.5A adjustable output, and 35µA quiescent current-making it the optimal choice for next-generation smartphones, OTG accessories, and portable multimedia devices where board space and battery life are co-constrained.
Availability
ISL91117IIAZ-T7A is available at Aetrix Electronics and suitable for smartphone power management, USB-OTG host supply, and portable HDMI transmitter applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for ISL91117IIAZ-T7A 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 trusted embedded design innovation, with expertise in analog, power, and mixed-signal ICs for automotive, industrial, and consumer markets.
The ISL91117 product line targets high-efficiency, space-constrained battery-powered systems-designed specifically to replace discrete boost solutions with fully integrated, protected, and footprint-optimized regulators for mobile and portable electronics.
FAQ
What is the maximum output current capability of the ISL91117IIAZ-T7A under typical operating conditions?
The ISL91117IIAZ-T7A delivers up to 1.5A output current when PVIN = 3.3V and VOUT = 5V, as confirmed in the datasheet's Recommended Operating Conditions and Figure 3 (Maximum Output Current vs Input Voltage). This rating assumes proper thermal management using the 20-ball WLCSP package's θJA = 66°C/W and adequate PCB copper area. At lower input voltages (e.g., 2.7V), the max output current reduces to ~1.0A due to duty-cycle limitations.
Does the ISL91117IIAZ-T7A support external synchronization, and what is the valid frequency range?
Yes, the ISL91117IIAZ-T7A supports external clock synchronization via the MODE pin. When driven with a clean square wave, it locks to input frequencies between 2.75MHz and 3.25MHz, as specified in the Analog Specifications table on page 5 of FN8569 Rev 3.01. This feature allows EMI reduction by aligning switching noise to non-sensitive frequency bands-critical in RF-dense environments like smartphones and wireless audio modules.
How does the ISL91117IIAZ-T7A achieve true input-output disconnect, and what is its impact on system power consumption?
The ISL91117IIAZ-T7A achieves true input-output disconnect using an internal P-channel MOSFET between PVIN and the boost output path. When EN is pulled low, this FET turns OFF, breaking the DC path from input to output. Simultaneously, the internal 120Ω soft-discharge resistor (RDISCHG) connects VOUT to GND, safely bleeding stored charge. This combination eliminates reverse current leakage and reduces standby current to <1µA, directly extending battery life in always-connected portable devices.
What are the recommended external components for a standard 5V output design using the ISL91117IIAZ-T7A?
For a nominal 5V output, Renesas recommends R1 = 320kΩ and R2 = 60.4kΩ to set the FB divider ratio per Equation 1 (VOUT = 0.8V × (1 + R1/R2)). A 22pF feed-forward capacitor (C3) across R1 improves load/line regulation. Use a 1µH shielded inductor rated ≥4A saturation current (e.g., Coilcraft XFL4020-102ME) and ceramic capacitors: one 22µF X5R at PVIN-to-PGND and two parallel 22µF X5R caps at VOUT-to-PGND, as shown in Figure 1 and Applications Information section.
What thermal protection mechanisms are integrated into the ISL91117IIAZ-T7A, and how do they behave during fault recovery?
The ISL91117IIAZ-T7A integrates thermal shutdown that triggers at +150°C (typical) and resumes operation at +125°C (typical hysteresis), as documented on page 5. During shutdown, all switching ceases and the internal reference is disabled. Upon cooling, the device executes its full soft-start sequence-including 1ms EN assertion delay and controlled VREF ramp-ensuring safe, overshoot-free restart without manual reset. This behavior is verified in Figure 17 and Functional Description (page 9).
ISL91117IIAZ-T7A 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-T7A FAQ
1.How can I place an order for ISL91117IIAZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91117IIAZ-T7A 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-T7A reliable?
The price and inventory of ISL91117IIAZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91117IIAZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL91117IIAZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91117IIAZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91117IIAZ-T7A?
ISL91117IIAZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91117IIAZ-T7A 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-T7A?
For technical support, including ISL91117IIAZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91117IIAZ-T7A requirements.
6.How does Aetrix verify that ISL91117IIAZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL91117IIAZ-T7A 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-T7A meets industry standards.
7.What is the process for return or replacement of ISL91117IIAZ-T7A?
All ISL91117IIAZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL91117IIAZ-T7A, 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-T7A part is unused and in its original packaging.
Return procedure for ISL91117IIAZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL91117IIAZ-T7A Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
