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Renesas ISL91107IINZ-TR5654
- Part No.:
- ISL91107IINZ-TR5654
- Manufacturer:
- Renesas
- Package:
- 15-UFBGA, WLCSP
- Datasheet:
-
ISL91107IINZ-TR5654.pdf
- Description:
- IC REG BUCK BST 3.3V 2A 15WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,243
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Product details
Overview
ISL91107IINZ-TR5654 from Renesas Electronics is a fully synchronous 4-switch buck-boost DC/DC regulator delivering up to 2A output current at 3.3V fixed output, operating from 1.8V–5.5V input, with 2.5MHz switching frequency and 45µA quiescent current - designed for compact power rails in mobile RF front-ends.
For engineers reviewing the ISL91107IINZ-TR5654 datasheet, ISL91107IINZ-TR5654 pinout, ISL91107IINZ-TR5654 application, or ISL91107IINZ-TR5654 equivalent, this page delivers verified technical context, package mapping, real-world load transient behavior, and validated alternative options for smartphone and wireless PA power design.
Technical Context
The ISL91107IINZ-TR5654 implements automatic, seamless mode transitions between buck and boost topologies using internal PWM control logic and dual high-side/low-side gate drivers - eliminating output disturbance during VIN-to-VOUT crossover. Its 4-switch architecture enables bidirectional voltage regulation without external diodes or complex sequencing.
It integrates P-channel (45mΩ) and N-channel (32mΩ) MOSFETs, a 0.8V reference, soft-start (1ms delay + 2–3ms ramp), soft-discharge (35Ω internal pull-down), and hiccup-mode overcurrent protection triggered after 16 consecutive peak-current-limit cycles - all within a 2.15mm × 1.51mm WLCSP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% (PWM mode), enabling direct replacement of LDOs in noise-sensitive RF supply rails. |
| Input Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, USB VBUS, and multi-rail battery systems without pre-regulation. |
| Max Output Current | 2A at PVIN = 2.8V, VOUT = 3.3V - sufficient for 4G/LTE power amplifier biasing under burst load conditions. |
| Switching Frequency | 2.5MHz (±10%) - allows use of 1µH inductors and minimizes EMI filtering footprint in space-constrained PCBs. |
| Quiescent Current | 45µA in PFM mode - extends battery runtime during standby or low-duty-cycle operation in portable devices. |
| Efficiency Peak | 96% at mid-load - achieved via synchronous rectification and low RDS(on) MOSFETs, reducing thermal dissipation in sealed enclosures. |
| Thermal Shutdown | 150°C with 30°C hysteresis - protects against sustained overload while enabling recovery without manual reset. |
Pinout & Package
ISL91107IINZ-TR5654 uses a 15-bump WLCSP (2.15mm × 1.51mm, 0.4mm pitch) per package drawing W3x5.15. Bumps are arranged in A–E rows × 1–3 columns; pin 1 is at A1 corner. Thermal resistance θJA = 78°C/W (free air).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2 PVIN | Primary power input | Accepts 1.8–5.5V; connects to 22µF input capacitor and high-current PGND loop - critical for ripple suppression in RF sections. |
| A3 VIN | Analog supply input | Provides stable bias for internal reference and error amp; must be decoupled independently to avoid VREF noise coupling. |
| B1, B2 LX1 | Inductor input node | Connects to one end of 1µH inductor; carries full switching current - requires short, wide trace routed on same layer as IC. |
| B3 EN | Enable control input | Active-high logic; <0.4V disables device and activates 35Ω VOUT-to-GND discharge path for fast rail collapse. |
| C1, C2 PGND | Power ground return | High-current return path for LX1/LX2 switches; must be tied directly to input/output capacitor grounds with minimal loop area. |
| C3 MODE | PFM/PWM selection | LOW forces continuous PWM (constant fSW); HIGH enables auto PFM for light-load efficiency optimization. |
| D1, D2 LX2 | Inductor output node | Connects to second end of inductor; switches polarity between buck/boost modes - shares same layout priority as LX1. |
| D3 GND | Analog ground reference | Low-noise reference for FB, VREF, and error amp; must be isolated from PGND and connected to quiet ground plane. |
| E1, E2 VOUT | Regulated output | 3.3V fixed output; requires 2×22µF X5R ceramic capacitors near pins to maintain stability under 2A transient loads. |
| E3 FB | Feedback sense input | Not used in fixed-output ISL91107IINZ variant; left unconnected - internal resistor divider sets VOUT = 3.3V. |
Key Features
| Feature | Design Value |
|---|---|
| Auto buck-boost mode transition | Zero-output-disturbance crossover when VIN crosses VOUT - eliminates voltage dip/glitch during battery discharge in smartphones. |
| 45µA quiescent current | Enables >100-hour standby in always-on wireless modules without compromising startup time or regulation accuracy. |
| Integrated 3.3V reference | 0.8V internal VFB with ±2% accuracy ensures tight output tolerance across -40°C to +85°C - critical for RF PA linearity. |
| 2.5MHz constant-frequency PWM | Permits ultra-small passive components (1µH inductor, 0603 caps) and simplifies EMI filter design versus sub-MHz alternatives. |
| Hiccup-mode overcurrent protection | Self-recovering fault response limits thermal stress during short-circuit events - avoids latch-up and enables field reliability. |
Applications
| Smartphone Baseband Power | 4G LTE Power Amplifier Supply |
|---|---|
|
Use Scenario: Powers baseband processor I/O rails where input voltage varies from 4.2V (fresh battery) to 3.0V (discharged), requiring stable 3.3V under dynamic load. IC Role / Device Role / Timing Role: Primary buck-boost regulator delivering regulated 3.3V with automatic mode switching and <100mV load transient deviation. Use Value: Eliminates need for separate buck + boost converters, reducing BOM count by 2 ICs and saving >12mm² PCB area. |
Use Scenario: Supplies 3.3V to LTE PA stages during high-PAPR transmission bursts, where load jumps from 10mA to 1.5A in <1µs. IC Role / Device Role / Timing Role: High-efficiency, fast-transient-response regulator with 35Ω soft-discharge for controlled PA turn-off timing. Use Value: Maintains PA gain flatness across battery voltage range and reduces thermal derating margin by 35% vs. LDO solution. |
| Tablet PC Camera Flash Driver | Wireless Headset Audio Codec Bias |
|
Use Scenario: Provides 3.3V bias to camera flash LED driver IC during short-duration, high-current pulses (up to 2A peak). IC Role / Device Role / Timing Role: Transient-capable buck-boost source with 2ms soft-start into buck mode and hiccup protection against flash capacitor inrush. Use Value: Prevents system brown-out during flash activation and enables single-cell battery operation without voltage sag. |
Use Scenario: Powers audio codec analog section in Bluetooth headsets where low-noise, low-quiescent operation is mandatory for 100+ hour battery life. IC Role / Device Role / Timing Role: Ultra-low-IQ (45µA) fixed-output regulator with separate GND/PGND pins to isolate sensitive analog ground from digital switching noise. Use Value: Reduces codec supply noise floor by 12dB vs. shared-LDO designs, improving SNR in voice capture applications. |
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 max output, 2.5V–5.5V input, 3.3V fixed option; 2.4MHz fSW; 25µA IQ; 12-bump WSON (3mm × 2mm) | Larger footprint (3×2mm vs. 2.15×1.51mm); lower IQ but no soft-discharge; requires external compensation. | Choose for lower quiescent current where board area is less constrained and soft-discharge is not required. |
| MAX77827AEWE+T | 2.5A max output, 2.5V–5.5V input, 3.3V fixed; 2MHz fSW; 50µA IQ; 16-bump WLP (2.13×1.53mm) | Near-identical package size; includes I2C programmability and power-good flag; higher cost and complexity. | Choose when system-level monitoring or dynamic voltage scaling is needed beyond fixed 3.3V operation. |
Compared with TPS63020DSJR and MAX77827AEWE+T, the ISL91107IINZ-TR5654 offers superior integration (no external compensation), guaranteed soft-discharge functionality, and tighter output accuracy (±2% vs. ±3%), making it optimal for space-limited, RF-critical mobile power rails.
Availability
ISL91107IINZ-TR5654 is available at Aetrix Electronics and suitable for smartphone baseband power, 4G LTE power amplifier supply, and wireless headset audio codec bias requiring stable component supply across high-volume consumer electronics production.
Supply support for ISL91107IINZ-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 mixed-signal solutions for automotive, industrial, and consumer markets.
The ISL91107 product line delivers highly integrated, small-footprint buck-boost regulators targeting battery-powered mobile devices where input voltage fluctuates across the output rail - optimized for RF PA, baseband, and sensor subsystems.
FAQ
What is the maximum output current capability of the ISL91107IINZ-TR5654?
The ISL91107IINZ-TR5654 delivers up to 2A of continuous output current when PVIN = 2.8V and VOUT = 3.3V, as specified in the FN8584 datasheet. This rating assumes proper thermal management using the 15-bump WLCSP package and recommended PCB layout with adequate copper pour. Derating applies at elevated ambient temperatures or reduced input voltage.
Does the ISL91107IINZ-TR5654 require external feedback resistors?
No. The ISL91107IINZ-TR5654 is the fixed 3.3V output variant - its feedback divider is internal, and the FB pin (E3) must remain unconnected. External resistors are only required for the adjustable version (e.g., ISL91107IIAZ-T). Using resistors with the IINZ variant will disrupt regulation and is not supported.
How does the ISL91107IINZ-TR5654 handle input voltage crossing the output voltage?
The ISL91107IINZ-TR5654 automatically and seamlessly transitions between buck and boost modes when VIN approaches or crosses VOUT = 3.3V, maintaining regulated output with minimal ripple (<20mV p-p) and no detectable dropout. This behavior is enabled by its 4-switch topology and proprietary PWM control logic - confirmed in Figures 23 and 24 of the FN8584 datasheet.
What is the purpose of the MODE pin on the ISL91107IINZ-TR5654?
The MODE pin selects between auto PFM (MODE = HIGH) and forced PWM (MODE = LOW) operation. In PFM mode, the ISL91107IINZ-TR5654 skips pulses at light load to achieve 45µA quiescent current; in forced PWM mode, it maintains constant 2.5MHz switching for predictable EMI and faster transient response - useful in noise-sensitive RF sections.
Can the ISL91107IINZ-TR5654 be used with a 1µH inductor?
Yes. The ISL91107IINZ-TR5654 is characterized and optimized for use with a 1µH inductor rated for ≥3.8A saturation current, such as Cyntec PIFE32251B-1R0MS or TOKO DFE322512C (per Table 1 in FN8584). Using this value ensures stable operation across the full 0–2A load range and meets the 2.5MHz switching requirement.
ISL91107IINZ-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:
- 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:
- 2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-WLCSP (1.51x2.15)
ISL91107IINZ-TR5654 FAQ
1.How can I place an order for ISL91107IINZ-TR5654 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL91107IINZ-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 ISL91107IINZ-TR5654 reliable?
The price and inventory of ISL91107IINZ-TR5654 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL91107IINZ-TR5654 is usually 5 days.
3.What payment methods are accepted for ISL91107IINZ-TR5654?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL91107IINZ-TR5654 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL91107IINZ-TR5654?
ISL91107IINZ-TR5654 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL91107IINZ-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 ISL91107IINZ-TR5654?
For technical support, including ISL91107IINZ-TR5654 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL91107IINZ-TR5654 requirements.
6.How does Aetrix verify that ISL91107IINZ-TR5654 is sourced from the original manufacturer or authorized distributors?
All ISL91107IINZ-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 ISL91107IINZ-TR5654 meets industry standards.
7.What is the process for return or replacement of ISL91107IINZ-TR5654?
All ISL91107IINZ-TR5654 units undergo pre-shipment inspection (PSI). If there is an issue with ISL91107IINZ-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 ISL91107IINZ-TR5654 part is unused and in its original packaging.
Return procedure for ISL91107IINZ-TR5654:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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