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Renesas ISL91107IIAZ-TR5654
- Part No.:
- ISL91107IIAZ-TR5654
- Manufacturer:
- Renesas
- Package:
- 15-UFBGA, WLCSP
- Datasheet:
-
ISL91107IIAZ-TR5654.pdf
- Description:
- IC REG BUCK BOOST ADJ 2A 15WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,300
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Product details
Overview
ISL91107IIAZ-TR5654 from Renesas Electronics is a fully synchronous 4-switch buck-boost DC/DC regulator delivering up to 2A output current (at PVIN = 2.8V, VOUT = 3.3V), operating across 1.8V–5.5V input range with 2.5MHz switching frequency and 45µA no-load quiescent current. It supports adjustable output voltages from 1V to 5.2V via external resistor divider and enables seamless automatic mode transitions between buck and boost for stable power in battery-powered mobile applications.
For engineers reviewing the ISL91107IIAZ-TR5654 datasheet, ISL91107IIAZ-TR5654 pinout, ISL91107IIAZ-TR5654 application, or ISL91107IIAZ-TR5654 equivalent, key selection criteria include its WLCSP-15 package footprint, 2.15mm × 1.51mm size, integrated 32mΩ N-channel and 45mΩ P-channel MOSFETs, soft-discharge function (35Ω), and thermal shutdown at 150°C with 30°C hysteresis.
Technical Context
The ISL91107IIAZ-TR5654 implements a true 4-switch buck-boost topology with independent LX1 (inductor input side) and LX2 (inductor output side) terminals, enabling continuous conduction mode operation across input-to-output voltage crossover. Its PWM controller dynamically selects buck or boost phase based on real-time VIN/VOUT comparison without output disturbance.
It features dual supply inputs-PVIN powers the power stage while VIN supplies the analog reference and control circuitry-plus separate PGND (high-current power ground) and GND (low-noise analog ground) pins to minimize noise coupling. The MODE pin selects auto PFM (high-efficiency light-load) or forced PWM (constant-frequency, low-noise) operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, Li-polymer, and multi-cell alkaline/NiMH battery inputs without pre-regulation. |
| Output Current | Up to 2A - verified at PVIN = 2.8V, VOUT = 3.3V; enables direct powering of RF power amplifiers and application processors. |
| Switching Frequency | 2.5MHz (typ) - allows use of compact 1µH inductors and minimizes EMI filtering requirements. |
| Quiescent Current | 45µA (PFM mode, no load) - extends battery runtime in standby/sleep states of portable devices. |
| Feedback Reference | 0.8V (±1.25% over temp) - sets output voltage via external resistor divider; supports 1V–5.2V programmability. |
| Thermal Shutdown | 150°C activation with 30°C hysteresis - protects die during sustained overload or poor PCB thermal design. |
| Soft Discharge Resistance | 35Ω (typ) - actively discharges VOUT when EN is low, preventing floating rail issues in system sequencing. |
Pinout & Package
ISL91107IIAZ-TR5654 uses a 15-bump Wafer-Level Chip-Scale Package (WLCSP) measuring 2.15mm × 1.51mm with 0.4mm pitch, RoHS-compliant and MSL3 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2 | PVIN | High-current power input (1.8V–5.5V); connects to input capacitor bank and supplies DC/DC power stage. |
| A3 | VIN | Analog supply input (1.8V–5.5V); powers internal reference, error amplifier, and control logic independently of PVIN. |
| B1, B2 | LX1 | Inductor connection point on input side; switches between PVIN and PGND in buck/boost phases. |
| B3 | EN | Active-high enable; drives HIGH to activate regulation, LOW to enter shutdown with soft discharge enabled. |
| C1, C2 | PGND | Power ground return for high di/dt switching currents; must be connected directly to input/output capacitor grounds. |
| C3 | MODE | Logic-selectable operation mode: HIGH = auto PFM (light-load efficiency), LOW = forced PWM (fixed frequency). |
| D1, D2 | LX2 | Inductor connection point on output side; switches between VOUT and PGND in buck/boost phases. |
| D3 | GND | Analog ground reference; isolated from PGND to prevent noise injection into feedback and reference circuits. |
| E1, E2 | VOUT | Regulated buck-boost output; requires 2×22µF ceramic capacitors to PGND for stability and transient response. |
| E3 | FB | Voltage feedback input; monitors output via resistor divider; 0.8V reference enables precise output programming. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Buck-Boost Mode Transition | Seamless, disturbance-free switching between buck and boost as VIN crosses VOUT - eliminates output glitches during battery discharge. |
| 4-Switch Synchronous Architecture | Integrated 32mΩ N-channel and 45mΩ P-channel MOSFETs - delivers up to 96% peak efficiency without external FETs or drivers. |
| Ultra-Low Quiescent Current | 45µA in PFM mode - reduces standby power loss by >50% vs. comparable 1MHz regulators, critical for always-on subsystems. |
| Integrated Soft Discharge | 35Ω internal pull-down on VOUT during disable - prevents uncontrolled discharge through system loads and simplifies power sequencing. |
| Comprehensive Protection Suite | Includes hiccup-mode overcurrent, thermal shutdown (150°C), UVLO (1.75V rising threshold), and reverse-current blocking - enables robust standalone operation. |
Applications
| Smartphone Core Power | Tablet PMIC Sub-Regulator |
|---|---|
|
Use Scenario: Powers application processor I/O or memory interface rails where input voltage varies from 4.2V (fresh Li-ion) down to 2.8V (deep discharge). IC Role / Device Role / Timing Role: Primary buck-boost regulator maintaining stable 3.3V or adjustable 1.8V/2.5V rail independent of battery state. Use Value: Eliminates need for separate buck + boost converters; reduces BOM count by 2 ICs and saves >25mm² PCB area. |
Use Scenario: Supplies 3.3V auxiliary rail for display backlight drivers or USB PHY in tablets with wide-input battery packs. IC Role / Device Role / Timing Role: Secondary regulated output derived from main PMIC or direct battery input, supporting dynamic load steps up to 2A. Use Value: 2.5MHz operation enables <1µH inductor use, reducing solution height to <1.0mm - critical for ultra-thin tablet designs. |
| 2G/3G/4G RF Power Amplifier Bias | Wireless Modem Baseband Core |
|
Use Scenario: Delivers tightly regulated 3.3V or 4.5V bias to cellular PA stages under pulsed 2A load transients and varying battery voltage. IC Role / Device Role / Timing Role: High-dV/dt tolerant buck-boost regulator with fast load transient response (<100µs recovery) and low output ripple. Use Value: Maintains PA linearity and efficiency across full battery range; avoids PA gain compression caused by rail droop. |
Use Scenario: Powers baseband SoC core voltage (e.g., 1.2V–1.4V) from shared battery rail in LTE/Wi-Fi modems with aggressive sleep/wake cycles. IC Role / Device Role / Timing Role: Adjustable-output buck-boost regulator operating in PFM mode during idle and PWM during active transmission. Use Value: 45µA IQ extends modem standby time to >72 hours; soft-start prevents inrush current from disrupting sensitive RF sections. |
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, 2A output, 2.4MHz switching, but uses 3-switch architecture and lacks dedicated VIN supply pin. | Requires tighter input voltage margin near VOUT; less optimal for systems with noisy or unstable analog supplies. | Prefer ISL91107IIAZ-TR5654 when separate analog supply (VIN) and robust PFM/PWM transition control are required. |
| MAX77827AEWE+T | 1.8V–5.5V input, 2.5A output, 2.2MHz, integrated I2C interface and telemetry, but larger 2.1mm × 2.1mm WLP package. | Supports dynamic voltage scaling and fault reporting - suited for systems requiring closed-loop power management. | Choose ISL91107IIAZ-TR5654 for cost-sensitive, pin-constrained designs needing minimal external components and no digital interface. |
Compared with TPS63020DSJR and MAX77827AEWE+T, the ISL91107IIAZ-TR5654 offers superior light-load efficiency due to its dedicated VIN supply and lower 45µA quiescent current, smaller 2.15mm × 1.51mm footprint, and smoother buck-boost crossover behavior - making it optimal for space-constrained, battery-life-critical mobile applications.
Availability
ISL91107IIAZ-TR5654 is available at Aetrix Electronics and suitable for smartphones, tablet PCs, and wireless communication devices requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for ISL91107IIAZ-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 delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and consumer markets, with emphasis on energy efficiency and system integration.
The ISL91107 product line was designed specifically for compact, high-efficiency power conversion in portable electronics - targeting battery-powered devices that demand seamless input-voltage crossover, minimal external components, and ultra-low quiescent current.
FAQ
What is the recommended inductor value for ISL91107IIAZ-TR5654?
The ISL91107IIAZ-TR5654 is optimized for a 1µH shielded ferrite inductor with ≥3.8A saturation current rating and low DCR. Recommended part numbers include Cyntec PIFE32251B-1R0MS and TOKO DFE322512C. Using this value ensures stable operation across the full 1.8V–5.5V input range and supports the 2.5MHz switching frequency without core saturation or excessive losses.
Does ISL91107IIAZ-TR5654 support fixed-output voltage configurations?
No - ISL91107IIAZ-TR5654 is the adjustable-output variant (marked "IIAZ"), requiring an external resistor divider on the FB pin to set VOUT between 1V and 5.2V. Fixed 3.3V versions are designated as ISL91107IINZ-T or ISL91107IINZ-T7A. The ISL91107IIAZ-TR5654's 0.8V feedback reference enables precise programmability but does not support factory-trimmed fixed outputs.
How does the soft-discharge function operate in ISL91107IIAZ-TR5654?
When EN is driven LOW, ISL91107IIAZ-TR5654 activates an internal 35Ω resistor between VOUT and GND. This provides controlled discharge of the output capacitor, preventing floating or undetermined voltage states during system power-down. The discharge rate depends on output capacitance and load; for 44µF total output capacitance, VOUT falls from 3.3V to 0.5V in ~1.5ms.
What is the purpose of the separate VIN and PVIN pins on ISL91107IIAZ-TR5654?
VIN supplies only the analog control circuitry (reference, error amp, oscillator), ensuring stable operation even if PVIN experiences noise or sag. PVIN powers the high-current switching stage (MOSFETs, LX nodes). This separation prevents switching noise from degrading regulation accuracy and improves PSRR - especially critical when powering noise-sensitive RF or audio subsystems from the same battery source.
Can ISL91107IIAZ-TR5654 operate with input voltage equal to output voltage?
Yes - ISL91107IIAZ-TR5654 is explicitly designed to handle VIN ≈ VOUT conditions. In this region, it rapidly alternates between buck and boost sub-cycles within a single switching period, maintaining tight regulation (<±2% accuracy) and low output ripple. This capability eliminates the "dropout gap" seen in traditional buck-only or boost-only regulators and is validated across 2.8V–3.6V input ranges with 3.3V output.
ISL91107IIAZ-TR5654 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 15-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:
- 2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-WLCSP (1.51x2.15)
ISL91107IIAZ-TR5654 FAQ
1.How can I place an order for ISL91107IIAZ-TR5654 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91107IIAZ-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 ISL91107IIAZ-TR5654 reliable?
The price and inventory of ISL91107IIAZ-TR5654 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91107IIAZ-TR5654 is usually 5 days.
3.What payment methods are accepted for ISL91107IIAZ-TR5654?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91107IIAZ-TR5654 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91107IIAZ-TR5654?
ISL91107IIAZ-TR5654 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91107IIAZ-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 ISL91107IIAZ-TR5654?
For technical support, including ISL91107IIAZ-TR5654 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91107IIAZ-TR5654 requirements.
6.How does Aetrix verify that ISL91107IIAZ-TR5654 is sourced from the original manufacturer or authorized distributors?
All ISL91107IIAZ-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 ISL91107IIAZ-TR5654 meets industry standards.
7.What is the process for return or replacement of ISL91107IIAZ-TR5654?
All ISL91107IIAZ-TR5654 units undergo pre-shipment inspection (PSI). If there is an issue with ISL91107IIAZ-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 ISL91107IIAZ-TR5654 part is unused and in its original packaging.
Return procedure for ISL91107IIAZ-TR5654:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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