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Renesas ISL9110AIITNZ-T
- Part No.:
- ISL9110AIITNZ-T
- Manufacturer:
- Renesas
- Package:
- 20-UFBGA, WLCSP
- Datasheet:
-
ISL9110AIITNZ-T.pdf
- Description:
- IC REG BCK BST 3.3V 1.2A 20WLCSP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ISL9110AIITNZ-T from Renesas Electronics is a 1.2A fully synchronous 4-switch buck-boost DC/DC regulator in a 20-ball WLCSP package, delivering fixed 3.3V output from 1.8V–5.5V input. It automatically transitions between buck and boost modes with no output disturbance, supports forced PWM and external clock synchronization, and achieves up to 95% efficiency for Li-ion-powered portable devices.
For engineers reviewing the ISL9110AIITNZ-T datasheet, ISL9110AIITNZ-T pinout, ISL9110AIITNZ-T application, or ISL9110AIITNZ-T equivalent, key selection considerations include its seamless mode transition behavior, 35µA no-load quiescent current, 2.5MHz switching frequency, integrated overcurrent/thermal/UVLO protection, and compatibility with single-cell battery systems requiring stable 3.3V rail generation.
Technical Context
The ISL9110AIITNZ-T implements a true 4-switch buck-boost topology with independent P-channel and N-channel MOSFET drivers, enabling continuous regulation when input voltage crosses output voltage. Its control architecture combines PWM and PFM modes, with automatic load-dependent mode switching at 75mA (PWM→PFM) and 200mA (PFM→PWM).
It features dual power inputs-PVIN for high-current switching path and VIN for internal reference and logic supply-along with separate PGND and GND pins to isolate high-frequency return paths. The device integrates soft-start (1–3ms depending on mode), soft-discharge (120Ω internal pull-down), and open-drain BAT/PG status outputs referenced to FB voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 1.2A continuous - supports full-load operation in compact handheld devices without thermal derating under typical PCB layout conditions. |
| Input Voltage Range | 1.8V to 5.5V - enables direct regulation from single Li-ion (2.7–4.2V), Li-polymer, or dual alkaline/NiMH cells without pre-regulation. |
| Output Voltage | Fixed 3.3V ±2% - eliminates external resistor divider, reduces BOM count, and ensures stable I/O rail for microcontrollers and sensors. |
| Switching Frequency | 2.5MHz (typical), 2.25–2.75MHz (min/max) - allows use of small 2.2µH inductors and 10µF ceramic capacitors, minimizing solution footprint. |
| Quiescent Current | 35µA (no load, PFM mode) - extends battery runtime in always-on or low-duty-cycle applications like sensor nodes and wearables. |
| Protection Features | Overcurrent (hiccup mode), thermal shutdown (155°C), UVLO (1.775V rising threshold), short-circuit detection - enables robust standalone operation without external supervision circuitry. |
| Package | 20-ball WLCSP, 2.4mm × 1.6mm, 0.4mm pitch - ultra-compact footprint compatible with space-constrained mobile PCBs and thin-profile assemblies. |
Pinout & Package
ISL9110AIITNZ-T uses a 20-ball Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch and RoHS-compliant SnAgCu solder balls. Thermal resistance θJA = 66°C/W enables operation up to +85°C ambient without heatsinking under typical 2-layer board conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, B1 | PVIN | Main power input for switching stage; connects to bulk capacitor and inductor input side; rated 1.8–5.5V, -0.3V to 6.5V absolute max. |
| A2, B2 | LX1 | High-side switch node (buck input / boost output); connects to inductor input; handles peak currents up to 2.4A. |
| A3, B3, C3, C4 | PGND | Power ground for high di/dt switching currents; must be connected to low-inductance ground plane beneath IC. |
| A4, B4 | LX2 | Low-side switch node (buck output / boost input); connects to inductor output side; shares same current rating as LX1. |
| A5, B5 | VOUT | Regulated output; requires 10µF ceramic capacitor to PGND; clamped at 5.25–5.95V to prevent overvoltage damage. |
| C1 | VIN | Analog/logic supply input; powers internal reference and control circuitry; must be decoupled independently from PVIN. |
| C2 | EN | Active-high enable; logic-compatible (VIH ≥ 1.4V); drives device into low-IQ shutdown (≤1µA) when pulled low. |
| C5, D4 | GND | Analog ground reference for error amplifier and feedback circuitry; must be tied to system analog ground near FB pin. |
| D1 | PG | Open-drain power-good output; asserts low when VOUT deviates >±3% from nominal; used for system sequencing and fault monitoring. |
| D2 | BAT | Open-drain battery-good output; asserts low when VIN > 2.0V (typical); provides early warning of battery depletion. |
| D3 | MODE/SYNC | Configurable logic input: high = auto PFM/PWM mode; low = forced PWM; also accepts 2.75–3.25MHz external sync clock. |
| D5 | FB | Feedback input; internally connected to 0.80V reference; unused in fixed 3.3V version but must be left floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Seamless buck-boost mode transition | Zero-output-disturbance crossing of VIN = VOUT boundary - eliminates voltage glitches during battery discharge in portable systems. |
| Ultra-low quiescent current | 35µA in PFM mode - preserves battery capacity in standby states without sacrificing fast wake-up response. |
| Integrated soft-discharge | 120Ω internal VOUT-to-GND resistor activated on EN deassertion - prevents floating output and simplifies power sequencing. |
| Independent PVIN/VIN supplies | Separates high-current switching path (PVIN) from precision analog supply (VIN) - improves PSRR and reference stability across input range. |
| Robust protection suite | Hiccup-mode OCP, thermal shutdown with 30°C hysteresis, UVLO, and short-circuit detection - enables unattended operation in consumer electronics. |
Applications
| Smartphone Power Management | Tablet Point-of-Load Regulation |
|---|---|
|
Use Scenario: Regulating stable 3.3V I/O rail from a single Li-ion battery (2.8–4.2V) during full discharge cycle. IC Role / Device Role / Timing Role: Primary buck-boost regulator providing clean, glitch-free 3.3V supply to application processor I/O, memory interfaces, and peripheral controllers. Use Value: Eliminates need for separate buck and boost converters or LDO post-regulation, reducing component count and PCB area by >40% versus discrete solutions. |
Use Scenario: Generating 3.3V core voltage for display interface ICs and touch controllers in tablets with variable battery voltage. IC Role / Device Role / Timing Role: Standalone point-of-load regulator supporting dynamic load steps up to 1A with <10mV transient deviation. Use Value: 2.5MHz switching enables sub-3mm² total solution size including inductor and capacitors, critical for slim bezel designs. |
| Handheld Medical Sensors | Industrial Handheld Terminals |
|
Use Scenario: Powering low-power MCU and analog front-end in battery-operated glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Primary DC/DC converter maintaining regulated 3.3V output while battery voltage drops from 4.1V to 2.9V. Use Value: 35µA quiescent current extends shelf life and operational runtime; integrated PG signal enables precise low-battery detection and graceful shutdown. |
Use Scenario: Supplying 3.3V logic rail in ruggedized barcode scanners operating across wide temperature (-40°C to +85°C) and input voltage ranges. IC Role / Device Role / Timing Role: High-reliability buck-boost regulator with thermal shutdown, UVLO, and hiccup-mode OCP for harsh industrial environments. Use Value: WLCSP package withstands mechanical shock and vibration; guaranteed operation over full industrial temperature range without derating. |
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 | 2A output, 2.5V–5.5V input, fixed 3.3V option; 2.4MHz switching; higher IQ (25µA vs 35µA) | Supports higher peak loads; lacks BAT status output and ultrasonic PFM mode | Preferred when >1.2A output current or tighter line regulation (<±0.5%) is required; requires different PCB layout due to 10-pin SON package. |
| MAX77827BEWC+T | 1.2A, 2.5V–5.5V input, adjustable/fixed 3.3V; 2.2MHz switching; 20µA IQ; includes I2C interface | Offers programmable output and telemetry via I2C; larger 20-pin WLP package (2.5mm × 2.5mm) | Chosen when system-level power management requires dynamic voltage scaling or real-time fault reporting; adds firmware complexity. |
Compared with TPS63020DSJR and MAX77827BEWC+T, the ISL9110AIITNZ-T delivers superior light-load efficiency via lower 35µA quiescent current, smaller 2.4mm × 1.6mm WLCSP footprint, and unique seamless mode transition-making it optimal for space- and battery-life-constrained portable designs where fixed 3.3V output suffices.
Availability
ISL9110AIITNZ-T is available at Aetrix Electronics and suitable for smartphone power management, tablet point-of-load regulation, and handheld medical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9110AIITNZ-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 management, and timing solutions for automotive, industrial, and consumer markets.
The ISL9110A belongs to Renesas' high-efficiency DC/DC converter product line, designed specifically for battery-powered portable electronics requiring compact, reliable, and highly integrated buck-boost regulation with minimal external components.
FAQ
What is the input voltage range supported by the ISL9110AIITNZ-T?
The ISL9110AIITNZ-T supports an input voltage range of 1.8V to 5.5V, enabling direct operation from single-cell Li-ion (2.7–4.2V), Li-polymer, or dual alkaline/NiMH batteries. Its buck-boost architecture maintains regulation even when input voltage crosses the 3.3V output threshold, making it ideal for battery discharge applications where VIN drops below VOUT.
Does the ISL9110AIITNZ-T require external resistors to set the output voltage?
No, the ISL9110AIITNZ-T is the fixed 3.3V output variant and does not require external resistors. The FB pin is internally connected to generate 3.3V (±2%) and must be left floating per the datasheet. This eliminates BOM cost and layout sensitivity associated with feedback dividers, unlike the adjustable ISL9110AIITAZ-T version.
How does the ISL9110AIITNZ-T handle transitions between buck and boost modes?
The ISL9110AIITNZ-T performs automatic and seamless transitions between buck and boost modes without output voltage disturbance. Its 4-switch architecture and adaptive control loop ensure continuous regulation during VIN crossing VOUT-demonstrated in Figure 9 and Figure 10 of the datasheet with <10mV transient deviation and no dropout.
What protection features are integrated into the ISL9110AIITNZ-T?
The ISL9110AIITNZ-T integrates overcurrent protection (hiccup mode), thermal shutdown (155°C trip, 125°C recovery), undervoltage lockout (1.775V rising threshold), short-circuit detection via FB monitoring, and output voltage clamping (5.25–5.95V). These features enable robust standalone operation in consumer electronics without external supervision circuitry.
Can the ISL9110AIITNZ-T be synchronized to an external clock?
Yes, the MODE/SYNC pin (D3) serves dual function: when pulled low, it forces PWM mode; when driven with a 2.75MHz–3.25MHz square wave, it synchronizes the internal oscillator to the external clock. This capability reduces EMI in noise-sensitive systems such as audio codecs or RF modules sharing the same PCB.
ISL9110AIITNZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WLCSP
ISL9110AIITNZ-T FAQ
1.How can I place an order for ISL9110AIITNZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9110AIITNZ-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 ISL9110AIITNZ-T reliable?
The price and inventory of ISL9110AIITNZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9110AIITNZ-T is usually 5 days.
3.What payment methods are accepted for ISL9110AIITNZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9110AIITNZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9110AIITNZ-T?
ISL9110AIITNZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9110AIITNZ-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 ISL9110AIITNZ-T?
For technical support, including ISL9110AIITNZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9110AIITNZ-T requirements.
6.How does Aetrix verify that ISL9110AIITNZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9110AIITNZ-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 ISL9110AIITNZ-T meets industry standards.
7.What is the process for return or replacement of ISL9110AIITNZ-T?
All ISL9110AIITNZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9110AIITNZ-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 ISL9110AIITNZ-T part is unused and in its original packaging.
Return procedure for ISL9110AIITNZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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