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Renesas ISL9307IRTAANFZ-T
- Part No.:
- ISL9307IRTAANFZ-T
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
ISL9307IRTAANFZ-T.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,348
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Product details
Overview
ISL9307IRTAANFZ-T from Renesas Electronics (formerly Intersil) is a dual-buck + dual-LDO mini-PMIC for Li-ion/Li-polymer battery-powered systems, integrating two 1500mA/3MHz synchronous step-down converters (DCD1/DCD2) and two 300mA low-input LDOs (LDO1/LDO2), with factory-fixed 3.3V and 2.5V outputs respectively, used in smartphone application processor core and I/O rail power delivery.
For engineers reviewing the ISL9307IRTAANFZ-T datasheet, ISL9307IRTAANFZ-T pinout, ISL9307IRTAANFZ-T application, or ISL9307IRTAANFZ-T equivalent, key selection criteria include fixed-output LDO voltage pairing, 3MHz switching frequency enabling compact 1.5µH inductors, skip-mode efficiency optimization under light load, independent enable control per channel, and thermal shutdown at 155°C with 30°C hysteresis.
Technical Context
The ISL9307IRTAANFZ-T implements peak-current-mode PWM control for both buck converters, supporting 100% duty cycle low-dropout operation and active output discharge via internal 115Ω bleeding resistor when disabled. Its UVLO thresholds are 2.2V (rising) on VINDCD1 and 1.41V (rising) on VINLDO, with hysteresis of 100mV and 50mV respectively.
Each LDO operates from 1.5V to 5.5V input, delivering up to 300mA with dropout voltage as low as 80mV at >2.8V output, while maintaining 55dB PSRR at 1kHz and 45µVRMS output noise (10Hz–100kHz). The device supports independent startup sequencing via four dedicated EN pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DCD Output Current | 1500mA per buck channel - supports high-current application processor cores and memory rails |
| LDO Output Current | 300mA per LDO - sufficient for sensor interfaces, RF bias, or low-power logic |
| Switching Frequency | 3.0MHz ±0.4MHz - enables use of 1.5µH inductors and reduces EMI fundamental frequency |
| LDO Output Voltages | Fixed 3.3V (LDO1) and 2.5V (LDO2) - eliminates external feedback resistors, simplifies layout |
| Quiescent Current | 50µA typical with both DCDs enabled in skip mode - extends battery runtime in standby |
| Thermal Shutdown | 155°C threshold with 30°C hysteresis - protects die during sustained overload or poor PCB thermal design |
| Package | 4mm × 4mm 16-lead TQFN - thermally enhanced with exposed pad for efficient heat dissipation |
Pinout & Package
ISL9307IRTAANFZ-T is housed in a 4mm × 4mm, 16-lead thin quad flat no-lead (TQFN) package with exposed thermal pad. Pin assignments follow the standard top-view configuration defined in FN7931 Rev 3.00, Page 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINDCD1 | Main input for DCD1 and internal circuitry supply | Accepts 2.5V–5.5V; powers digital/analog blocks and first buck stage |
| FB1 | Feedback node for DCD1 | Connected directly to 3.3V LDO1 output (fixed version); sets regulation point at 0.8V reference |
| ENDCD1 | Enable control for DCD1 | Active-high logic (1.4V min); allows precise power-up sequencing with delay |
| ENLDO1 | Enable control for LDO1 | Active-high logic (1.4V min); independent control enables staggered rail activation |
| VINLDO | Shared input for LDO1 and LDO2 | 1.5V–5.5V range; may be supplied from battery or DCD output |
| VOLDO1 / VOLDO2 | Fixed-output LDO terminals | 3.3V and 2.5V outputs respectively; no external components required |
| ENLDO2 | Enable control for LDO2 | Active-high logic (1.4V min); decouples LDO2 activation from LDO1 |
| GNDLDO | Power ground for both LDOs | Separate ground path minimizes noise coupling into sensitive analog rails |
| ENDCD2 | Enable control for DCD2 | Independent enable allows asymmetric power sequencing between DCD1 and DCD2 |
| FB2 | Feedback node for DCD2 | Connected directly to 2.5V LDO2 output (fixed version); same 0.8V reference as FB1 |
| VINDCD2 | Main input for DCD2 | 2.3V–VINDCD1 range; supports lower input than DCD1 for flexible source partitioning |
| SW2 / SW1 | Switching nodes | Connect to inductor terminals; require short, wide traces to minimize EMI and losses |
| GNDDCD2 / GNDDCD1 | Power grounds for DCD2/DCD1 | Dedicated ground returns reduce cross-talk between high-current switching paths |
| VINLDO | Shared input for LDO1 and LDO2 | 1.5V–5.5V range; may be supplied from battery or DCD output |
| E-pad | Exposed thermal pad | Must be soldered to PCB thermal plane with ≥9 vias for effective junction-to-board thermal resistance |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3MHz synchronous buck converters | Enables ultra-compact DC/DC design using 1.5µH inductors and 10µF ceramic output caps |
| Independent EN pins per regulator | Supports programmable power-up/down sequencing without external timing circuitry |
| Factory-fixed LDO outputs (3.3V/2.5V) | Eliminates external feedback resistors and associated layout sensitivity |
| Active output discharge (115Ω bleed) | Prevents floating outputs and ensures fast, controlled rail discharge during disable |
| Skip-mode operation under light load | Reduces quiescent current to 50µA typical, maximizing battery life in standby |
| Integrated overcurrent and thermal protection | 2.5A peak current limit per buck, 155°C thermal shutdown with 30°C hysteresis |
Applications
| Smartphone Application Processor Core Power | Mobile Baseband & RF Front-End Bias |
|---|---|
Use Scenario: Powering ARM Cortex-A series CPU cores requiring tightly regulated 1.2V/1.8V rails with fast transient response. IC Role / Device Role / Timing Role: ISL9307IRTAANFZ-T delivers primary core voltage via DCD1/DCD2 while LDO1 supplies auxiliary logic and LDO2 powers RF synthesizer bias. Use Value: 3MHz switching and peak-current-mode control achieve <100mV undershoot during 150mA→1500mA load steps, ensuring stable processor execution. | Use Scenario: Supplying clean, low-noise bias to LTE/Wi-Fi transceivers and power amplifiers in multi-band smartphones. IC Role / Device Role / Timing Role: ISL9307IRTAANFZ-T uses LDO2 (2.5V) for PA bias and LDO1 (3.3V) for baseband I/O, while DCDs power digital baseband cores. Use Value: 45µVRMS output noise and 55dB PSRR at 1kHz suppress supply-induced phase noise in RF signal chains. |
| Portable Medical Instrument Sensor Rails | Wearable Fitness Tracker System-on-Chip |
Use Scenario: Providing isolated, low-noise analog supply for biosensor ADC front-ends and precision op-amps in handheld diagnostics. IC Role / Device Role / Timing Role: ISL9307IRTAANFZ-T assigns LDO1 (3.3V) to analog sensors and LDO2 (2.5V) to reference buffers, with DCDs powering MCU and display drivers. Use Value: Dedicated GNDLDO and low dropout (<125mV @300mA) ensure stable reference voltage despite battery voltage sag. | Use Scenario: Consolidating power for ARM Cortex-M based SoC, OLED display driver, and Bluetooth LE radio in space-constrained wearables. IC Role / Device Role / Timing Role: ISL9307IRTAANFZ-T uses DCD1 for SoC core (1.2V), DCD2 for display (2.8V), LDO1 (3.3V) for BLE radio, and LDO2 (2.5V) for touch controller. Use Value: 50µA skip-mode IQ and 4mm×4mm footprint enable >7-day battery life in always-on monitoring mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck + dual-LDO PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023RSBR | 2.25MHz switching, 1.8V/2.5V/3.3V fixed LDOs, no skip mode, higher IQ (80µA) | Designed for OMAP-based platforms; lacks active discharge and 3MHz frequency | Choose when legacy OMAP compatibility or triple-LDO count is required over efficiency and size |
| RT8070ZSP | Single 2A buck + dual 300mA LDOs, 2MHz, no independent EN pins, no skip mode | Targeted at cost-sensitive IoT nodes; missing second high-current buck channel | Choose only if system requires only one high-current rail and accepts reduced sequencing flexibility |
Compared with TPS65023RSBR and RT8070ZSP, the ISL9307IRTAANFZ-T provides superior light-load efficiency via skip mode, smaller passive components due to 3MHz operation, and full per-channel enable control-critical for complex power sequencing in modern application processors.
Availability
ISL9307IRTAANFZ-T is available at Aetrix Electronics and suitable for smartphone power management, portable medical instrumentation, and wearable electronics requiring stable component supply across extended production lifecycles.
Supply support for ISL9307IRTAANFZ-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 Corporation is a global leader in microcontrollers, analog, power, and SoC products, with heritage from Intersil's high-performance analog portfolio.
The ISL9307 product line was designed specifically for space-constrained, battery-powered mobile devices requiring integrated multi-rail power with minimal external components and robust thermal performance.
FAQ
What are the fixed output voltages of the LDOs in ISL9307IRTAANFZ-T?
The ISL9307IRTAANFZ-T features factory-programmed fixed LDO outputs: LDO1 delivers 3.3V and LDO2 delivers 2.5V. These values are confirmed in the Ordering Information table (Page 4, FN7931 Rev 3.00) under part marking "AANFZ", where "F" denotes 2.5V for LDO2 and "A" denotes 3.3V for LDO1. No external feedback resistors are needed.
Does ISL9307IRTAANFZ-T support power sequencing between its regulators?
Yes, ISL9307IRTAANFZ-T supports precise power sequencing via four independent enable pins: ENDCD1, ENDCD2, ENLDO1, and ENLDO2. Each is active-high with 1.4V logic threshold, allowing staggered startup delays by controlling external pull-up timing or microcontroller GPIO sequencing. This capability is explicitly documented in the Pin Descriptions (Page 3) and Applications section (Page 1).
What is the maximum recommended operating temperature for ISL9307IRTAANFZ-T?
The ISL9307IRTAANFZ-T has a recommended operating ambient temperature range of –40°C to +85°C, as specified in the Recommended Operating Conditions table (Page 5, FN7931 Rev 3.00). Its thermal shutdown activates at +155°C (junction), with 30°C hysteresis, but continuous operation above +85°C ambient is not supported per datasheet specifications.
Can ISL9307IRTAANFZ-T operate with a single-cell Li-ion battery input?
Yes, ISL9307IRTAANFZ-T is explicitly designed for single Li-ion/Li-polymer battery input, supporting VINDCD1/VINDCD2 from 2.5V to 5.5V and VINLDO from 1.5V to 5.5V. Its 2.2V undervoltage lockout on VINDCD1 and 1.41V on VINLDO ensures reliable operation down to battery discharge endpoints, as stated in the Absolute Maximum Ratings and Theory of Operation sections (Pages 5 and 7).
What package type and thermal characteristics does ISL9307IRTAANFZ-T use?
ISL9307IRTAANFZ-T uses a 4mm × 4mm, 16-lead TQFN package (drawing L16.4X4G) with an exposed thermal pad. Its typical junction-to-ambient thermal resistance (θJA) is 40.2°C/W under standard test conditions (Page 5), and the datasheet mandates soldering the E-pad to a PCB thermal plane with ≥9 vias for optimal heat dissipation (Page 8).
ISL9307IRTAANFZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (2), Linear (LDO) (2)
- Number of Outputs:
- 4
- Frequency - Switching:
- 3MHz
- Voltage/Current - Output 1:
- 0.8V ~ 5.5V, 1.5A
- Voltage/Current - Output 2:
- 0.8V ~ 5.5V, 1.5A
- Voltage/Current - Output 3:
- 3.3V, 300mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 1.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (4x4)
ISL9307IRTAANFZ-T FAQ
1.How can I place an order for ISL9307IRTAANFZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9307IRTAANFZ-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 ISL9307IRTAANFZ-T reliable?
The price and inventory of ISL9307IRTAANFZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9307IRTAANFZ-T is usually 5 days.
3.What payment methods are accepted for ISL9307IRTAANFZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9307IRTAANFZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9307IRTAANFZ-T?
ISL9307IRTAANFZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9307IRTAANFZ-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 ISL9307IRTAANFZ-T?
For technical support, including ISL9307IRTAANFZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9307IRTAANFZ-T requirements.
6.How does Aetrix verify that ISL9307IRTAANFZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9307IRTAANFZ-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 ISL9307IRTAANFZ-T meets industry standards.
7.What is the process for return or replacement of ISL9307IRTAANFZ-T?
All ISL9307IRTAANFZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9307IRTAANFZ-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 ISL9307IRTAANFZ-T part is unused and in its original packaging.
Return procedure for ISL9307IRTAANFZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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