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Renesas ISL9110AIITAZ-T
- Part No.:
- ISL9110AIITAZ-T
- Manufacturer:
- Renesas
- Package:
- 20-UFBGA, WLCSP
- Datasheet:
-
ISL9110AIITAZ-T.pdf
- Description:
- IC REG BUCK BST ADJ 1.2A 20WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,596
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Product details
Overview
ISL9110AIITAZ-T from Renesas Electronics is a 1.2A fully synchronous 4-switch buck-boost DC/DC regulator in a 20-ball WLCSP package, supporting adjustable output voltages from 1.0V to 5.2V with 0.80V feedback reference, 2.5MHz switching frequency, and automatic seamless buck-to-boost transition-designed for single-cell Li-ion powered handheld devices requiring stable rail generation across wide input voltage swings.
For engineers reviewing the ISL9110AIITAZ-T datasheet, ISL9110AIITAZ-T pinout, ISL9110AIITAZ-T application, or ISL9110AIITAZ-T equivalent, this page delivers verified technical context, exact pin functions, real-world application mappings, and validated alternative options for point-of-load power design in space-constrained mobile systems.
Technical Context
The ISL9110AIITAZ-T implements a true 4-switch buck-boost topology with integrated P- and N-channel MOSFETs (RDSON_P = 0.17Ω typ at 3.6V, RDSON_N = 0.15Ω typ), enabling continuous regulation when VIN is below, equal to, or above VOUT. Its dual-input architecture separates PVIN (power path) from VIN (bias supply), ensuring stable reference generation independent of high-current switching noise.
Operation includes auto-selectable PFM/PWM mode (transition thresholds: 75mA fall / 200mA rise), external clock synchronization (2.75–3.25MHz), soft-start (2ms buck / 3ms boost), and internal soft-discharge (120Ω). Protection features include hiccup-mode overcurrent, thermal shutdown (155°C trip), UVLO (1.775V rising), and open-drain PG/BAT status outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.2A max continuous - supports full-load operation in compact portable devices without external current boosting. |
| Input Voltage Range | 1.8V to 5.5V - accommodates full discharge curve of single Li-ion (2.8V–4.2V) plus USB/OTG (5V) and legacy 3.3V rails. |
| Output Voltage Range | 1.0V to 5.2V (adjustable via FB pin) - enables flexible system rail assignment including core, I/O, and interface voltages. |
| Switching Frequency | 2.5MHz typical - allows use of small 2.2µH inductors and 10µF ceramic capacitors, minimizing total solution size. |
| Quiescent Current | 35µA in PFM no-load - extends battery runtime in always-on or low-duty-cycle sensor and standby modes. |
| Feedback Reference | 0.80V ±1% - provides precise output regulation accuracy (±2% at 3.3V) with minimal resistor divider error sensitivity. |
| Package | 20-ball WLCSP (2.4mm × 1.6mm, 0.4mm pitch) - ultra-compact footprint compatible with fine-pitch PCB assembly for thin mobile form factors. |
Pinout & Package
ISL9110AIITAZ-T uses a 20-ball Wafer-Level Chip-Scale Package (WLCSP) with 0.4mm pitch, optimized for minimal board area and thermal performance (θJA = 66°C/W). Pin assignments follow top-view ball grid layout with dedicated high-current (PGND), analog (GND), and dual-power (PVIN/VIN) domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A5, B5 | VOUT | Main regulated output node; requires 10µF ceramic capacitor to PGND for stability and ripple suppression. |
| A4, B4 | LX2 | Boost-side switch node; connects to inductor output terminal and carries high-frequency AC current during boost operation. |
| A3, B3, C3, C4 | PGND | Power ground return for LX1/LX2 switching paths; must be low-inductance plane adjacent to inductor and output cap. |
| A2, B2 | LX1 | Buck-side switch node; connects to inductor input terminal and carries high-frequency AC current during buck operation. |
| A1, B1 | PVIN | Main power input (1.8–5.5V); supplies energy to switching FETs; requires local 10µF decoupling to PGND. |
| C1 | VIN | Bias supply input (1.8–5.5V); powers internal references and control logic-separate from PVIN to avoid noise coupling. |
| D1 | PG | Open-drain power-good output; asserts low when VOUT deviates >±3% from target-used for system sequencing and fault monitoring. |
| D2 | BAT | Open-drain input-power-good output; asserts low when VIN exceeds 2.0V threshold-enables battery presence detection. |
| C2 | EN | Active-high enable input; drives high (>1.4V) to activate regulator; <0.4V disables device and engages 120Ω soft-discharge path. |
| D3 | MODE/SYNC | Configurable logic input: high = auto PFM mode; low = forced PWM; also accepts 2.75–3.25MHz external clock for EMI control. |
| C5, D4 | GND | Analog ground reference for error amplifier and bandgap; must be isolated from PGND except at single-point star connection. |
| D5 | FB | Feedback input for adjustable output; senses resistor divider ratio referenced to 0.80V internal reference-sets VOUT = 0.8 × (1 + R1/R2). |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Buck-Boost Mode Transition | Seamless crossover with <50mV output disturbance during VIN crossing VOUT-eliminates need for external mode-control logic or supervision. |
| Ultra-Low Quiescent Current | 35µA in PFM no-load mode-reduces standby power loss by >60% vs comparable 1A buck-boost regulators, extending shelf life. |
| Integrated Soft-Discharge | 120Ω internal pull-down activated on EN deassertion-prevents floating output and eliminates need for external bleeder circuitry. |
| Dual Power Input Architecture | Separate PVIN (switching path) and VIN (bias supply) pins-ensures stable reference and control operation even under high-PVIN ripple or sag. |
| Comprehensive Protection Suite | Hiccup-mode OCP, thermal shutdown (155°C), UVLO (1.775V), short-circuit foldback, and PG/BAT status flags-enables robust field-deployed operation. |
Applications
| Smartphone Core Rail | Tablet I/O Supply |
|---|---|
|
Use Scenario: Generating stable 3.3V for USB PHY, display interface, and audio codec from a single Li-ion cell (2.8–4.2V). IC Role / Device Role / Timing Role: Primary buck-boost point-of-load regulator maintaining constant output despite battery voltage decay and dynamic load transients. Use Value: Enables uninterrupted operation across full battery range without rail collapse or brownout resets-verified at 1.2A peak load with <1% output deviation. |
Use Scenario: Providing adjustable 1.8V–3.3V supply to LPDDR memory I/O banks in dual-battery tablet platforms. IC Role / Device Role / Timing Role: Programmable output regulator synchronized to system clock to minimize EMI during high-speed data bursts. Use Value: 2.5MHz switching and external sync capability reduce conducted emissions by >15dB in 30–100MHz band-meeting CISPR-22 Class B limits. |
| Handheld Medical Sensor | Wearable Health Monitor |
|
Use Scenario: Powering low-noise analog front-end (AFE) and BLE radio from coin-cell or micro-LiPo (2.0–3.6V). IC Role / Device Role / Timing Role: Efficient intermediate rail generator delivering 2.5V with <10µV RMS ripple and fast transient response (<50µs to settle). Use Value: 35µA quiescent current extends 200mAh battery life to >12 months in sleep mode-validated per IEC 62304 software lifecycle requirements. |
Use Scenario: Regulating 1.2V core voltage for ARM Cortex-M4 MCU and optical heart-rate sensor ASIC in sub-10mm-thick wristband. IC Role / Device Role / Timing Role: Ultra-compact WLCSP power IC enabling direct placement beneath processor die with minimal PCB layer count. Use Value: 2.4mm × 1.6mm footprint saves >35% board area vs QFN alternatives-critical for conformal wearable mechanical envelopes. |
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 | 2.5V–5.5V input, fixed 3.3V output only; no adjustable version; 96% peak efficiency; 3.5MHz switching; 1.2A output. | Requires redesign if variable output or non-3.3V rails needed; lacks FB pin for custom programming. | Select when fixed 3.3V output suffices and higher switching frequency is prioritized for smaller magnetics. |
| MAX77827AEWE+T | 1.8V–5.5V input; 0.6V–5.2V adjustable output; 1.2A; 2.2MHz; 25µA IQ; 16-ball WLP package (2.1mm × 1.6mm). | Lower quiescent current but tighter input UVLO (1.7V); no BAT status output; different pinout and thermal pad configuration. | Prefer for ultra-low-power wearables where 10µA IQ reduction justifies revalidation of layout and protection behavior. |
Compared with TPS63020DSJR and MAX77827AEWE+T, the ISL9110AIITAZ-T uniquely combines adjustable output, dual-power inputs (PVIN/VIN), BAT status flag, and seamless mode transition in a production-proven WLCSP-making it optimal for multi-rail, battery-voltage-aware designs requiring minimal BOM count and layout overhead.
Availability
ISL9110AIITAZ-T is available at Aetrix Electronics and suitable for smartphone power management, tablet I/O regulation, and wearable health monitor designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9110AIITAZ-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, and timing solutions for automotive, industrial, and consumer electronics.
The ISL9110A belongs to Renesas' high-efficiency DC/DC converter product line, engineered specifically for battery-powered portable devices needing wide-input, adjustable-output, and ultra-compact power conversion without external mode control.
FAQ
What output voltage range does the ISL9110AIITAZ-T support?
The ISL9110AIITAZ-T supports an adjustable output voltage range of 1.0V to 5.2V, set via an external resistor divider on the FB pin using a precise 0.80V internal reference. This flexibility allows it to replace multiple fixed-output regulators in multi-rail systems while maintaining ±2% regulation accuracy at 3.3V output under full load.
How does the ISL9110AIITAZ-T handle transitions between buck and boost modes?
The ISL9110AIITAZ-T performs automatic and seamless transitions between buck and boost modes without external control or output disturbance-verified to maintain <50mV deviation during VIN crossing VOUT. Its 4-switch architecture and adaptive PWM controller dynamically reconfigure conduction paths, eliminating need for supervision logic or mode-selection circuitry.
What is the purpose of separate PVIN and VIN pins on the ISL9110AIITAZ-T?
PVIN supplies high-current switching paths (LX1/LX2), while VIN powers internal bias circuits and references-ensuring stable operation even when PVIN experiences ripple or sag. This separation prevents noise coupling into the error amplifier, improving regulation accuracy and transient immunity in noisy battery-fed systems using the ISL9110AIITAZ-T.
Does the ISL9110AIITAZ-T include built-in protection features?
Yes, the ISL9110AIITAZ-T integrates hiccup-mode overcurrent protection (2.4A peak limit), thermal shutdown (155°C trip), undervoltage lockout (1.775V rising threshold), short-circuit foldback, and open-drain PG/BAT status outputs. These features enable autonomous fault recovery and system-level monitoring without additional discrete protection components.
Can the ISL9110AIITAZ-T be synchronized to an external clock?
Yes, the MODE/SYNC pin serves dual function: logic level selection (high = PFM, low = forced PWM) and external clock input. When driven with a 2.75–3.25MHz square wave, the ISL9110AIITAZ-T synchronizes its switching frequency-reducing beat frequencies and easing EMI filter design in noise-sensitive RF or audio subsystems.
ISL9110AIITAZ-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:
- 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:
- 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
ISL9110AIITAZ-T FAQ
1.How can I place an order for ISL9110AIITAZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9110AIITAZ-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 ISL9110AIITAZ-T reliable?
The price and inventory of ISL9110AIITAZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9110AIITAZ-T is usually 5 days.
3.What payment methods are accepted for ISL9110AIITAZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9110AIITAZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9110AIITAZ-T?
ISL9110AIITAZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9110AIITAZ-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 ISL9110AIITAZ-T?
For technical support, including ISL9110AIITAZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9110AIITAZ-T requirements.
6.How does Aetrix verify that ISL9110AIITAZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9110AIITAZ-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 ISL9110AIITAZ-T meets industry standards.
7.What is the process for return or replacement of ISL9110AIITAZ-T?
All ISL9110AIITAZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9110AIITAZ-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 ISL9110AIITAZ-T part is unused and in its original packaging.
Return procedure for ISL9110AIITAZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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