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Renesas ISL9307IRTAANWZ-T
- Part No.:
- ISL9307IRTAANWZ-T
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
ISL9307IRTAANWZ-T.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,966
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Product details
Overview
ISL9307IRTAANWZ-T from Renesas (formerly Intersil) is a dual-buck + dual-LDO mini-PMIC for single-cell 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). It delivers fixed 3.3V on LDO1 and 1.2V on LDO2, supports power sequencing via independent EN pins, and operates across –40°C to +85°C in portable microprocessor power applications.
For engineers reviewing the ISL9307IRTAANWZ-T datasheet, ISL9307IRTAANWZ-T pinout, ISL9307IRTAANWZ-T application, or ISL9307IRTAANWZ-T equivalent, key selection considerations include its dual-buck + dual-LDO integration, 3.3V/1.2V factory-fixed LDO outputs, 3MHz switching frequency enabling compact 1.5µH inductors, skip-mode efficiency optimization, and 4mm×4mm 16-lead TQFN package with exposed thermal pad.
Technical Context
The ISL9307IRTAANWZ-T implements peak-current-mode PWM control for both buck converters, enabling fast transient response and pulse-by-pulse current limiting up to 1500mA per channel. Its 3MHz nominal switching frequency (2.6–3.4MHz range) minimizes external passive size while supporting PFM skip mode under light load to reduce quiescent current to 50µA typical.
LDO1 and LDO2 operate from 1.5V–5.5V input, deliver 300mA each, and feature 80–250mV dropout at 300mA depending on output voltage. Each regulator includes independent enable logic, internal current limiting (~425mA typical), and 55dB PSRR at 1kHz - all optimized for noise-sensitive core and I/O rail generation in mobile SoC subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DCD Output Current | 1500mA per channel - supports high-current processor cores or memory rails without external boost stages. |
| LDO Output Current | 300mA per channel - sufficient for low-power peripherals, sensors, or interface I/O with tight regulation. |
| Switching Frequency | 3.0MHz (2.6–3.4MHz) - enables use of 1.5µH inductors and small ceramic capacitors, reducing board area by >40% vs. 1MHz designs. |
| LDO1/LDO2 Outputs | Fixed 3.3V / 1.2V - factory-set, eliminating external feedback resistors and simplifying layout for known-voltage rails. |
| Quiescent Current | 50µA typical (buck skip mode), 20µA per enabled LDO - extends battery runtime in standby and low-power states. |
| Operating Temp Range | –40°C to +85°C - qualified for industrial-grade portable equipment including smartphones and handheld instruments. |
| UVLO Thresholds | VINDCD1: 2.2V (rising), VINLDO: 1.41V (rising) - prevents erratic operation during battery sag or cold-start conditions. |
Pinout & Package
The ISL9307IRTAANWZ-T is housed in a 4mm × 4mm, 16-lead Thin Quad Flat No-lead (TQFN) package with exposed thermal pad (JEDEC MO220K, pkg drawing L16.4X4G). The E-pad must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINDCD1 | Buck converter DCD1 input supply | Accepts 2.5–5.5V; powers internal digital/analog circuits and DCD1 switch node. |
| FB1 | DCD1 feedback reference | 0.8V nominal regulation point; connected to output divider (or directly to VODCD1 for fixed versions). |
| ENDCD1 | DCD1 enable control | Active-high logic (1.4V threshold); enables startup sequencing and dynamic power gating. |
| ENLDO1 | LDO1 enable control | Active-high logic (1.4V threshold); allows independent turn-on timing for 3.3V rail. |
| VINLDO | LDO1/LDO2 common input | 1.5–5.5V range; may be supplied from battery or DCD output for cascaded regulation. |
| VOLDO1 | LDO1 regulated output | Factory-fixed 3.3V output; no external resistor required - reduces BOM count and layout complexity. |
| VOLDO2 | LDO2 regulated output | Factory-fixed 1.2V output - matches common DSP/core voltage requirements without feedback network. |
| ENLDO2 | LDO2 enable control | Active-high logic (1.4V threshold); supports staggered power-up of 1.2V domain relative to other rails. |
| GNDLDO | LDO power ground | Dedicated ground return for LDO1/LDO2; separation from buck grounds improves PSRR and noise isolation. |
| ENDCD2 | DCD2 enable control | Independent enable for second buck channel - enables flexible sequencing of dual-core or dual-rail systems. |
| FB2 | DCD2 feedback reference | 0.8V nominal regulation point; identical function to FB1 but for DCD2 output path. |
| VINDCD2 | Buck converter DCD2 input supply | 2.3V to VINDCD1 range - supports asymmetric input configurations or split-battery topologies. |
| SW2 | DCD2 switching node | Connects to inductor terminal; carries high di/dt pulses - requires short, wide trace routing and ground plane clearance. |
| GNDDCD2 | DCD2 power ground | Low-impedance return path for DCD2 high-side/low-side FETs; critical for EMI and efficiency. |
| GNDDCD1 | DCD1 power ground | Separate ground for DCD1 - avoids coupling between buck channels and maintains regulation accuracy. |
| SW1 | DCD1 switching node | Connects to inductor terminal; same routing constraints as SW2 - must avoid sensitive analog traces. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3MHz synchronous buck converters | Enables <1.5µH inductor use and <10µF output capacitance per channel - cuts solution size by >35% vs. 1MHz alternatives. |
| Independent enable pins per regulator | Supports precise power sequencing (e.g., LDO1 before DCD1) without external timers or supervisors - reduces system-level component count. |
| Factory-fixed LDO outputs (3.3V/1.2V) | Eliminates external feedback resistors and associated placement/tolerance errors - improves yield and simplifies validation for production. |
| Active output discharge (115Ω bleed) | Forces rapid discharge of DCD1/DCD2 outputs when disabled - prevents floating voltages that could damage downstream logic or cause latch-up. |
| Thermal shutdown with 30°C hysteresis | Shuts down at 155°C and recovers at ~130°C - protects against sustained overload or poor heatsinking without requiring external thermal monitoring. |
Applications
| Smartphone Application | Portable Instrument Power |
|---|---|
Use Scenario: Dual-core application processor powering with independent core (1.2V) and I/O (3.3V) rails from single Li-ion cell. IC Role / Device Role / Timing Role: ISL9307IRTAANWZ-T provides primary DC/DC conversion and low-noise LDO regulation - delivering stable, sequenced voltages with minimal external components. Use Value: Reduces total PMIC footprint by consolidating four regulators into one 4mm×4mm package, lowering BOM cost and improving battery life via 3MHz skip-mode efficiency. | Use Scenario: Handheld test equipment requiring clean, isolated analog and digital supplies from limited battery capacity. IC Role / Device Role / Timing Role: ISL9307IRTAANWZ-T generates low-noise 3.3V for MCU and precision 1.2V for ADC reference - using dedicated LDO grounds and PSRR-optimized design. Use Value: Achieves <45µVRMS output noise and 55dB PSRR at 1kHz, enabling accurate 12-bit+ measurements without additional filtering or discrete LDOs. |
| DSP Core Supply | Li-ion Battery-Powered Media Player |
Use Scenario: Low-voltage DSP core demanding tight transient response and sub-200mV dropout under 300mA load. IC Role / Device Role / Timing Role: ISL9307IRTAANWZ-T LDO2 delivers 1.2V at 300mA with 125mV dropout (typical) and active discharge - ensuring safe core reset during sleep/wake transitions. Use Value: Eliminates need for external discharge FET and reduces wake-up delay by guaranteeing rapid rail collapse and recovery within µs-scale timing budgets. | Use Scenario: Portable media player with display backlight, audio codec, and NAND flash - all powered from 3.7V nominal Li-ion cell. IC Role / Device Role / Timing Role: ISL9307IRTAANWZ-T supplies 3.3V to audio codec and 1.2V to NAND I/O, while DCDs power display driver and main SoC - all with coordinated enable sequencing. Use Value: Enables simultaneous multi-rail power-up in <5ms with <±3% output accuracy, preventing brown-out resets during playback start-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-buck + dual-LDO power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65023BRSBR | Triple 1.5A buck + triple LDO; 2.5–5.5V input; no fixed 1.2V LDO option - requires external feedback for 1.2V rail. | Higher integration (3 buck + 3 LDO) but larger 5mm×5mm QFN package and higher quiescent current (80µA buck-only). | Select when needing third buck channel or higher LDO count; avoid if strict 4mm×4mm footprint and fixed 1.2V are mandatory. |
| RT8070ZSP | Dual 2A buck + dual 300mA LDO; 2.7–5.5V input; adjustable LDOs only - no factory-fixed 3.3V/1.2V variants. | Higher buck current rating and better thermal performance, but requires four external feedback resistors and lacks skip-mode efficiency optimization. | Select for higher load margin (>1.5A) or elevated ambient temperature; avoid when minimizing BOM count and optimizing light-load battery life are priorities. |
Compared with TPS65023BRSBR and RT8070ZSP, the ISL9307IRTAANWZ-T offers the smallest footprint (4mm×4mm), lowest light-load quiescent current (50µA), and zero-resistor fixed 3.3V/1.2V LDO outputs - making it optimal for space-constrained, battery-sensitive portable designs where rail count and simplicity are prioritized over maximum current headroom.
Availability
ISL9307IRTAANWZ-T is available at Aetrix Electronics and suitable for smartphone power management, portable instrumentation, DSP core supply, Li-ion battery-powered media players, and handheld medical devices requiring stable component supply across industrial temperature ranges.
Supply support for ISL9307IRTAANWZ-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 (acquired Intersil in 2017) is a global leader in high-performance analog and mixed-signal semiconductors, specializing in power management, precision analog, and interface solutions for mobile, industrial, and automotive markets.
The ISL9307 product line was designed specifically for ultra-compact, high-efficiency power delivery in single-cell Li-ion portable electronics - emphasizing integration density, light-load efficiency, and factory-configured simplicity for rapid time-to-market.
FAQ
What is the exact LDO output voltage configuration of the ISL9307IRTAANWZ-T?
The ISL9307IRTAANWZ-T features factory-programmed fixed-output LDOs: LDO1 delivers 3.3V and LDO2 delivers 1.2V. These values are set at wafer sort and require no external feedback resistors - confirmed in the Ordering Information table (Page 4) of FN7931 Rev 3.00, where "SLV LDO1 (V)" = 3.3 and "SLV LDO2 (V)" = 1.2 for part marking "9307I AANWZ".
Does the ISL9307IRTAANWZ-T support power sequencing, and how is it implemented?
Yes, the ISL9307IRTAANWZ-T supports precise power sequencing via four independent enable pins: ENDCD1, ENDCD2, ENLDO1, and ENLDO2. Each pin accepts standard CMOS logic levels (1.4V high threshold), allowing external controllers or simple RC delays to stagger startup - for example, enabling LDO1 (3.3V) before DCD1 to power bias circuitry, as shown in Figure 12 of the datasheet.
What is the recommended inductor value and type for the ISL9307IRTAANWZ-T buck converters?
The ISL9307IRTAANWZ-T is characterized with 1.5µH shielded power inductors rated for ≥1.8A saturation current and ≤50mΩ DCR, such as Sumida CDRH2D14NP-1R5 (3.0mm×3.0mm×1.55mm). This value is specified in Table 1 (Page 2) and optimized for 3MHz operation - using smaller inductors risks excessive ripple or instability, while larger values degrade transient response.
How does the ISL9307IRTAANWZ-T handle thermal overload, and what is its shutdown behavior?
The ISL9307IRTAANWZ-T incorporates thermal shutdown at +155°C (typical) with +30°C hysteresis, resuming operation at ~+130°C. During shutdown, all regulators disable and the internal bleeding resistors actively discharge DCD outputs. This behavior is documented in the Absolute Maximum Ratings (Page 5) and Theory of Operation (Page 8) sections of FN7931 Rev 3.00.
Is the ISL9307IRTAANWZ-T RoHS-compliant and compatible with lead-free reflow processes?
Yes, the ISL9307IRTAANWZ-T is RoHS-compliant and uses 100% matte tin (e3) termination finish, qualified for both SnPb and Pb-free soldering. Its Moisture Sensitivity Level (MSL) and peak reflow profile meet IPC/JEDEC J-STD-020 requirements - details are provided in Note 2 and Note 3 of the Ordering Information table (Page 4) of FN7931 Rev 3.00.
ISL9307IRTAANWZ-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)
ISL9307IRTAANWZ-T FAQ
1.How can I place an order for ISL9307IRTAANWZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9307IRTAANWZ-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 ISL9307IRTAANWZ-T reliable?
The price and inventory of ISL9307IRTAANWZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9307IRTAANWZ-T is usually 5 days.
3.What payment methods are accepted for ISL9307IRTAANWZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9307IRTAANWZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9307IRTAANWZ-T?
ISL9307IRTAANWZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9307IRTAANWZ-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 ISL9307IRTAANWZ-T?
For technical support, including ISL9307IRTAANWZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9307IRTAANWZ-T requirements.
6.How does Aetrix verify that ISL9307IRTAANWZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9307IRTAANWZ-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 ISL9307IRTAANWZ-T meets industry standards.
7.What is the process for return or replacement of ISL9307IRTAANWZ-T?
All ISL9307IRTAANWZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9307IRTAANWZ-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 ISL9307IRTAANWZ-T part is unused and in its original packaging.
Return procedure for ISL9307IRTAANWZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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