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Renesas ISL9120IIAZ-TR5654
- Part No.:
- ISL9120IIAZ-TR5654
- Manufacturer:
- Renesas
- Package:
- 9-UFBGA, WLCSP
- Datasheet:
-
ISL9120IIAZ-TR5654.pdf
- Description:
- IC REG BUCK BST ADJ 800MA 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,036
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Product details
Overview
ISL9120IIAZ-TR5654 from Renesas Electronics is an adjustable-output buck-boost switching regulator IC designed for ultra-low-power portable systems. It accepts 1.8V–5.5V input, delivers up to 800mA output current at 3.3V, operates with adaptive PFM control, features automatic and forced bypass modes, and uses a single inductor in a 1.41mm × 1.41mm WLCSP package for space-constrained wearable and mobile power rails.
For engineers reviewing the ISL9120IIAZ-TR5654 datasheet, ISL9120IIAZ-TR5654 pinout, ISL9120IIAZ-TR5654 application, or ISL9120IIAZ-TR5654 equivalent, key selection criteria include its adjustable VOUT (1.0V–5.2V), 41µA quiescent current in regulation mode, 0.8V FB reference, 3.5µA forced-bypass current, and thermal shutdown at 150°C - all critical for battery-powered system efficiency and reliability validation.
Technical Context
The ISL9120IIAZ-TR5654 implements a four-switch buck-boost topology with integrated P-channel and N-channel MOSFETs (50mΩ rDSON each), enabling seamless transitions between buck, boost, and automatic bypass modes without output disturbance. Its adaptive multilevel current limit scheme dynamically adjusts peak inductor current from 350mA to 2A across 32 levels based on PFM pulse count, optimizing efficiency across light-to-heavy loads.
It employs separate analog (GND) and power (PGND) ground pins to isolate sensitive feedback circuitry from high di/dt switching currents, and integrates soft-start (1ms delay + ramp), soft-discharge (110Ω internal resistor), UVLO (1.725V rising threshold), and thermal shutdown (150°C trip, 35°C hysteresis) for robust system-level protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, Li-poly, or multi-cell alkaline/battery inputs without pre-regulation. |
| Output Voltage Range | 1.0V to 5.2V (adjustable via external resistor divider) - enables flexible rail generation for SoCs, sensors, and RF modules. |
| Max Output Current | 800mA at VIN=2.5V, VOUT=3.3V - sufficient for PMIC sub-rails or moderate-power peripherals. |
| Quiescent Current | 41µA in regulation mode - minimizes standby power loss in always-on subsystems. |
| Forced Bypass Current | ≤3.5µA - extends battery life during deep-sleep states where regulation is unnecessary. |
| FB Reference Voltage | 0.80V - sets precision for external resistor-divider programming with low bias current (25nA). |
| Thermal Shutdown | 150°C with 35°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
ISL9120IIAZ-TR5654 is housed in a RoHS-compliant 9-bump WLCSP (1.41mm × 1.41mm, 0.4mm pitch, pkg drawing W3x3.9E), optimized for minimal board area in thin-profile portable devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX1 | Inductor input-side switch node | Connects to input side of 1µH inductor; carries high di/dt buck-mode current. |
| VIN | Main power input | Supplies converter and internal references; requires 10µF ceramic capacitor to PGND. |
| BYP | Forced bypass enable input | Logic HIGH activates direct VIN→VOUT path; must not float - ties to EN or controller GPIO. |
| EN | Master enable input | Logic HIGH enables regulation; logic LOW disables device and activates 110Ω soft-discharge path. |
| GND | Analog ground reference | Reference for FB, BYP, EN; must be isolated from PGND to avoid noise coupling into feedback loop. |
| PGND | Power ground return | High-current return path for LX1/LX2 switching; connects to input/output capacitor grounds. |
| LX2 | Inductor output-side switch node | Connects to output side of inductor; carries high di/dt boost-mode current. |
| VOUT | Regulated output | Delivers regulated voltage; requires 22µF–47µF ceramic capacitor to PGND for stability. |
| FB | Feedback input | Monitors output via resistor divider; 0.80V reference enables precise VOUT programming (e.g., 187k/60.4k for 3.3V). |
Key Features
| Feature | Design Value |
|---|---|
| Automatic bypass mode | Engages when |VIN − VOUT| < 1–2%, reducing conduction loss and ripple for near-input-output conditions. |
| Adaptive PFM control | Adjusts switching frequency and peak current limit dynamically to maintain >90% efficiency from 10µA to 800mA load. |
| Integrated 50mΩ MOSFETs | Eliminates need for external switches; reduces solution size and improves thermal performance vs discrete designs. |
| Separate GND/PGND pins | Prevents ground bounce from high di/dt switching from corrupting FB accuracy or EN/BYP logic thresholds. |
| Soft-discharge on disable | 110Ω internal resistor safely discharges VOUT capacitance when EN is deasserted, preventing floating rail issues. |
Applications
| Smartphone Core Power | Wearable Sensor Hub |
|---|---|
Use Scenario: Powers application processor I/O or memory interface rails where input voltage varies widely (e.g., 3.0V–4.2V Li-ion) while maintaining stable 3.3V or 1.8V output. IC Role / Device Role / Timing Role: Primary buck-boost regulator providing dynamic voltage scaling and seamless mode transitions during battery discharge. Use Value: Eliminates need for separate buck and boost converters, reducing BOM count and PCB area by ~40% versus dual-stage solutions. |
Use Scenario: Supplies ultra-low-power environmental sensor cluster (accelerometer, gyroscope, humidity) in hearables or fitness bands. IC Role / Device Role / Timing Role: Adjustable-output regulator delivering 1.2V or 2.8V from declining coin-cell or thin-film battery (2.0V–3.6V). Use Value: 41µA quiescent current and forced bypass mode extend battery life beyond 6 months in intermittent-sensing applications. |
| Tablet Display Bias | IoT Edge Node PMIC |
Use Scenario: Generates programmable AVDD or VCOM voltage for LCD or OLED display panels requiring precise, ripple-sensitive bias rails. IC Role / Device Role / Timing Role: High-accuracy adjustable regulator with 0.8V FB reference and ±3% output voltage tolerance over temperature. Use Value: Automatic bypass eliminates switching noise during static display frames, improving image quality and EMI compliance. |
Use Scenario: Provides configurable auxiliary rail (e.g., 3.3V for MCU, 1.8V for radio) in battery-powered LoRaWAN or NB-IoT nodes. IC Role / Device Role / Timing Role: Standalone buck-boost regulator supporting wide input range and deep-sleep current optimization. Use Value: Forced bypass mode reduces system sleep current to <1µA total when main MCU is off, meeting 10-year battery life targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Fixed 3.3V or adjustable (0.9V–5.5V); higher 2A max output; 2.5MHz fixed-frequency PWM (vs PFM); larger 2mm × 2mm QFN. | Better for noise-sensitive analog rails needing fixed-frequency operation; less optimal for ultra-low-IQ sleep modes. | Select if system requires lower output ripple or higher current than ISL9120IIAZ-TR5654 supports. |
| MAX77827AEWA+T | Adjustable 2.5V–5.5V output; 1.2A max; integrated I2C interface for dynamic voltage scaling; 1.97mm × 1.97mm WLP. | Suitable for systems requiring real-time VOUT adjustment (e.g., adaptive SoC DVFS); adds communication overhead and layout complexity. | Select if firmware-controlled output voltage changes are required during operation. |
Compared with TPS63020DSJR and MAX77827AEWA+T, the ISL9120IIAZ-TR5654 offers the smallest footprint (1.41mm²), lowest quiescent current in regulation (41µA), and simplest implementation (no I2C or external compensation), making it ideal for cost- and space-constrained portable designs where adaptive PFM efficiency is prioritized over fixed-frequency noise control or digital programmability.
Availability
ISL9120IIAZ-TR5654 is available at Aetrix Electronics and suitable for smartphone power management, wearable sensor hubs, tablet display bias supplies, IoT edge node PMICs, and portable medical monitors requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for ISL9120IIAZ-TR5654 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 connectivity solutions for automotive, industrial, and consumer markets.
The ISL9120 product line was designed specifically for ultra-compact, high-efficiency DC/DC conversion in battery-powered portable electronics - emphasizing minimal external components, adaptive efficiency, and seamless buck-boost-bypass transitions.
FAQ
What output voltage range does the ISL9120IIAZ-TR5654 support?
The ISL9120IIAZ-TR5654 supports an adjustable output voltage range of 1.0V to 5.2V, set using an external resistor divider connected to the FB pin. Its 0.80V internal reference voltage enables precise programming - for example, using 187kΩ and 60.4kΩ resistors yields a nominal 3.3V output. This flexibility allows the ISL9120IIAZ-TR5654 to serve diverse rail requirements across portable SoCs, sensors, and RF subsystems.
How does the forced bypass mode function in the ISL9120IIAZ-TR5654?
In forced bypass mode, the ISL9120IIAZ-TR5654 establishes a direct conductive path from VIN to VOUT via its internal power transistors and external inductor, disabling regulation to achieve ultra-low quiescent current (<3.5µA). This mode is activated by driving the BYP pin logic HIGH and is intended for system sleep states where output voltage accuracy is not required - such as when powering an LDO in standby. The ISL9120IIAZ-TR5654 exits bypass mode automatically after ≥1ms when BYP is deasserted.
What is the recommended inductor value for the ISL9120IIAZ-TR5654?
The ISL9120IIAZ-TR5654 is optimized for use with a 1µH shielded ferrite inductor rated for ≥2A saturation current and low DCR (e.g., TDK TFM201610GHM-1R0MTAA, 50mΩ typical). This value balances efficiency, transient response, and physical size. Inductor selection directly impacts peak current limit behavior and PFM burst frequency - deviating significantly from 1µH may degrade light-load efficiency or cause instability. The ISL9120IIAZ-TR5654 datasheet confirms this value across all performance curves and application schematics.
Does the ISL9120IIAZ-TR5654 require external compensation components?
No, the ISL9120IIAZ-TR5654 is fully internally compensated and requires no external compensation network. Its adaptive PFM control architecture and integrated error amplifier are factory-tuned for stability with standard 10µF input and 22µF–47µF output ceramic capacitors. This simplifies design and reduces bill-of-materials - a key advantage confirmed in the "Applications Information" section of the FN8659 datasheet, which specifies only three mandatory external components for the adjustable version (inductor, CIN, COUT) plus two resistors for VOUT setting.
What protection features are integrated into the ISL9120IIAZ-TR5654?
The ISL9120IIAZ-TR5654 integrates undervoltage lockout (UVLO with 1.725V rising threshold), overtemperature shutdown (150°C trip, 35°C hysteresis), and soft-discharge (110Ω internal resistor activated on EN deassertion). It also includes reverse-current protection and current-limit detection within its adaptive PFM scheme. Notably, forced bypass mode disables overcurrent protection - users must ensure external current limiting or system-level safeguards are in place when operating the ISL9120IIAZ-TR5654 in that mode.
ISL9120IIAZ-TR5654 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 9-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 5.2V
- Current - Output:
- 800mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-WLCSP (1.41x1.41)
ISL9120IIAZ-TR5654 FAQ
1.How can I place an order for ISL9120IIAZ-TR5654 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9120IIAZ-TR5654 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 ISL9120IIAZ-TR5654 reliable?
The price and inventory of ISL9120IIAZ-TR5654 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9120IIAZ-TR5654 is usually 5 days.
3.What payment methods are accepted for ISL9120IIAZ-TR5654?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9120IIAZ-TR5654 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9120IIAZ-TR5654?
ISL9120IIAZ-TR5654 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9120IIAZ-TR5654 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 ISL9120IIAZ-TR5654?
For technical support, including ISL9120IIAZ-TR5654 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9120IIAZ-TR5654 requirements.
6.How does Aetrix verify that ISL9120IIAZ-TR5654 is sourced from the original manufacturer or authorized distributors?
All ISL9120IIAZ-TR5654 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 ISL9120IIAZ-TR5654 meets industry standards.
7.What is the process for return or replacement of ISL9120IIAZ-TR5654?
All ISL9120IIAZ-TR5654 units undergo pre-shipment inspection (PSI). If there is an issue with ISL9120IIAZ-TR5654, 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 ISL9120IIAZ-TR5654 part is unused and in its original packaging.
Return procedure for ISL9120IIAZ-TR5654:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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