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Renesas ISL9307IRTAAJLZ-T7A
- Part No.:
- ISL9307IRTAAJLZ-T7A
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
ISL9307IRTAAJLZ-T7A.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:490
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Product details
Overview
ISL9307IRTAAJLZ-T7A from 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 fixed 2.8V and 2.9V outputs respectively, operating across –40°C to +85°C in a 4mm×4mm TQFN-16 package.
For engineers reviewing the ISL9307IRTAAJLZ-T7A datasheet, ISL9307IRTAAJLZ-T7A pinout, ISL9307IRTAAJLZ-T7A application, or ISL9307IRTAAJLZ-T7A equivalent, key selection criteria include its dual-buck switching frequency (3MHz), LDO output voltage pairing (2.8V/2.9V), quiescent current in skip mode (50μA typ), thermal shutdown threshold (+155°C), and power sequencing via independent EN pins.
Technical Context
The ISL9307IRTAAJLZ-T7A implements peak-current-mode PWM control for both DCD1 and DCD2, enabling fast transient response and pulse-by-pulse overcurrent protection up to 2.75A peak. It supports light-load efficiency optimization via 16-cycle zero-crossing–triggered skip mode, where output regulation is maintained by internal comparator–controlled pulse bursts synchronized to the 3MHz clock.
LDO1 and LDO2 operate from 1.5V–5.5V input, deliver 300mA each, and feature 80–250mV dropout at full load depending on output voltage. Their fixed 2.8V and 2.9V outputs are factory pre-set, eliminating external feedback resistors, and they share a common VINLDO rail with independent enable logic (ENLDO1/ENLDO2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 3.0 MHz ±0.4 MHz - enables use of 1.5µH inductors and compact 0603/0805 capacitors for space-constrained portable designs. |
| DCD Output Current | 1500 mA per channel - supports core logic and memory rails in smartphones and PDAs without external boost stages. |
| LDO Output Voltages | Fixed 2.8 V (LDO1) and 2.9 V (LDO2) - eliminates FB resistor networks and simplifies layout for analog/audio subsystems. |
| Quiescent Current | 50 µA typical with both DCDs in skip mode - extends battery runtime during standby in always-on sensor or RF modules. |
| Thermal Shutdown | +155°C threshold with +30°C hysteresis - provides robust overtemperature protection while allowing safe operation up to +125°C junction. |
| Input Voltage Range | VINDCD1/VINDCD2: 2.5–5.5 V; VINLDO: 1.5–5.5 V - accommodates single-cell Li-ion (2.8–4.2 V) and allows LDOs to be powered from either battery or buck outputs. |
| Package | 4 mm × 4 mm, 16-lead TQFN with exposed thermal pad - delivers θJA = 40.2°C/W for high-power-density thermal management. |
Pinout & Package
The ISL9307IRTAAJLZ-T7A is housed in a 4mm×4mm, 16-lead thin quad flat no-lead (TQFN) package with an exposed thermal pad (E-pad) that must be soldered to system ground for optimal thermal performance and EMI control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VINDCD1 | Main input for DCD1 and internal circuitry supply | Accepts 2.5–5.5 V; powers digital/analog blocks and DCD1 switch driver; requires local 10µF input capacitor. |
| 2 FB1 | Feedback node for DCD1 output regulation | Connected directly to DCD1 output (fixed version); sets 0.8 V reference point for closed-loop voltage control. |
| 3 ENDCD1 | Enable control for DCD1 | Active-high logic (≥1.4 V); allows precise power-up sequencing with delay relative to other rails. |
| 4 ENLDO1 | Enable control for LDO1 | Active-high logic (≥1.4 V); independently controls 2.8 V rail activation for analog subsystems. |
| 5 VINLDO | Shared input for LDO1 and LDO2 | Accepts 1.5–5.5 V; may be tied to battery or DCD1/DCD2 output; includes UVLO at ~1.4 V. |
| 6 VOLDO1 | Fixed 2.8 V LDO1 output | Delivers up to 300 mA; no external components required; dropout ≤200 mV at 300 mA for 2.8 V output. |
| 7 VOLDO2 | Fixed 2.9 V LDO2 output | Delivers up to 300 mA; factory-trimmed; PSRR ≥55 dB at 1 kHz supports noise-sensitive analog circuits. |
| 8 ENLDO2 | Enable control for LDO2 | Active-high logic (≥1.4 V); enables independent control of 2.9 V rail for camera or audio codecs. |
| 9 GNDLDO | Power ground for LDOs | Must be connected to low-impedance ground plane; separate from DCD grounds to minimize noise coupling. |
| 10 ENDCD2 | Enable control for DCD2 | Active-high logic (≥1.4 V); supports staggered startup between DCD1 and DCD2 for inrush current limiting. |
| 11 FB2 | Feedback node for DCD2 output regulation | Connected directly to DCD2 output (fixed version); identical 0.8 V reference as FB1. |
| 12 VINDCD2 | Main input for DCD2 | Accepts 2.3–VINDCD1; supports independent input sourcing or shared battery connection. |
| 13 SW2 | DCD2 switching node | Connects to one end of 1.5 µH inductor; high di/dt node requiring short, wide trace routing away from sensitive signals. |
| 14 GNDDCD2 | Power ground for DCD2 | Return path for DCD2 high-side/low-side FETs; must be tied to local ground plane near SW2 and COUT. |
| 15 GNDDCD1 | Power ground for DCD1 | Return path for DCD1 high-side/low-side FETs; kept separate from GNDDCD2 until joined at single-point ground. |
| 16 SW1 | DCD1 switching node | Connects to one end of 1.5 µH inductor; routed with minimal loop area to reduce EMI and voltage spikes. |
| E-pad | Exposed thermal pad | Must be soldered to PCB thermal pad with ≥9 vias to inner ground planes; primary heat dissipation path. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3MHz synchronous buck converters | Enables ultra-compact DC/DC design using 1.5µH inductors and 0603/0805 MLCCs, reducing solution footprint by >30% vs. 1MHz alternatives. |
| Independent EN pins per regulator | Supports flexible power sequencing-e.g., delay LDO2 activation until DCD2 stabilizes-to prevent bus contention or latch-up in multi-rail SoC systems. |
| Active output discharge (115Ω bleed) | Forces rapid discharge of DCD1/DCD2 outputs when disabled, preventing floating voltages that could cause downstream logic glitches or I²C bus lockup. |
| Low-dropout LDOs with fixed outputs | Eliminates external feedback resistors for LDO1 (2.8V) and LDO2 (2.9V), reducing BOM count and improving accuracy versus adjustable versions. |
| Thermal shutdown with hysteresis | Shuts down at +155°C and resumes at +130°C, preventing thermal runaway while avoiding oscillation near trip point during sustained high-load operation. |
Applications
| Smartphone Core Power | Portable Media Player Audio Rail |
|---|---|
Use Scenario: Powers application processor cores and GPU in mid-tier smartphones using single Li-ion battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Dual buck converters supply 1.2 V and 1.8 V core/memory rails; LDOs provide clean 2.8 V and 2.9 V for PMIC housekeeping and sensor interfaces. Use Value: 3 MHz switching minimizes inductor size; skip mode extends standby time; independent EN pins align with Android boot sequence requirements. | Use Scenario: Supplies low-noise bias to DACs, headphone amplifiers, and MEMS microphones in portable media players. IC Role / Device Role / Timing Role: LDO1 (2.8 V) powers analog audio front-end; LDO2 (2.9 V) supplies codec reference; DCDs power digital baseband and display drivers. Use Value: 45 µVRMS output noise and 55 dB PSRR at 1 kHz ensure <105 dB SNR in 24-bit audio paths without additional filtering. |
| DSP-Based Portable Instrument | Li-ion–Powered Industrial Sensor Node |
Use Scenario: Powers TI C5000 or Analog Devices SHARC DSPs and associated ADCs/DACs in handheld test equipment. IC Role / Device Role / Timing Role: DCD1 delivers 1.2 V @ 1500 mA to DSP core; DCD2 supplies 3.3 V @ 1500 mA to I/O and memory; LDOs power precision analog signal chains. Use Value: Fast transient response (<10 µs recovery from 150→1500 mA step) maintains DSP clock stability during burst processing. | Use Scenario: Powers ultra-low-power MCU (e.g., STM32L4), LoRa transceiver, and MEMS accelerometer in battery-operated condition monitoring nodes. IC Role / Device Role / Timing Role: DCDs supply MCU core (1.8 V) and radio (3.3 V); LDOs deliver stable 2.8 V/2.9 V to sensor analog front-end and reference buffers. Use Value: 50 µA quiescent current in skip mode enables >5-year battery life on CR2032 or single Li-ion cell with periodic wake-up intervals. |
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; 2.25–6.5 V input; no fixed 2.8V/2.9V LDO pairing; uses external FB resistors for all LDOs. | Requires more external components; better suited for systems needing >3 regulated rails or wider input range. | Select if needing third buck channel or higher input voltage tolerance beyond 5.5 V. |
| MAX8646ETG+ | Dual 1.5A buck + dual 300mA LDO; 2.5–5.5 V input; LDO outputs configurable via I²C (not fixed); 2.5 MHz switching. | Software-programmable LDOs add flexibility but require firmware integration; lower switching frequency increases passive size. | Select if dynamic LDO voltage adjustment or I²C-based power sequencing is required. |
Compared with TPS65023BRSBR and MAX8646ETG+, the ISL9307IRTAAJLZ-T7A offers the smallest solution size due to 3MHz operation and factory-fixed LDO outputs, making it optimal for cost- and space-constrained portable devices where 2.8V/2.9V rails are standard.
Availability
ISL9307IRTAAJLZ-T7A is available at Aetrix Electronics and suitable for smartphone power delivery, portable audio subsystems, DSP-based instrumentation, and Li-ion–powered industrial sensor nodes requiring stable component supply and long-term production continuity.
Supply support for ISL9307IRTAAJLZ-T7A 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
Intersil Corporation is a U.S.-based designer of high-performance analog semiconductors, specializing in power management and signal conditioning ICs for mobile, computing, and industrial markets.
The ISL9307 product line was engineered as a mini-PMIC family targeting space-constrained, battery-powered portable electronics requiring tightly sequenced, low-noise multiple voltage rails from a single Li-ion cell.
FAQ
What are the fixed output voltages of LDO1 and LDO2 on the ISL9307IRTAAJLZ-T7A?
The ISL9307IRTAAJLZ-T7A has factory-trimmed fixed outputs: LDO1 delivers 2.8 V and LDO2 delivers 2.9 V. These values are specified in the Ordering Information table (Page 4 of FN7931 Rev 3.00) and require no external feedback resistors, simplifying layout and improving output accuracy versus adjustable variants.
Does the ISL9307IRTAAJLZ-T7A support power sequencing between its four regulators?
Yes, the ISL9307IRTAAJLZ-T7A provides independent enable pins (ENDCD1, ENDCD2, ENLDO1, ENLDO2) for each regulator, allowing precise control over startup timing. This enables staggered activation-for example, powering DCD1 before enabling LDO1-to meet SoC power-on reset requirements and avoid bus contention.
What is the maximum recommended operating temperature for the ISL9307IRTAAJLZ-T7A?
The ISL9307IRTAAJLZ-T7A is rated for operation from –40°C to +85°C ambient temperature. Its thermal shutdown activates at +155°C junction temperature with +30°C hysteresis, and the recommended maximum junction temperature is +125°C, ensuring reliable performance in sealed portable enclosures.
Can the ISL9307IRTAAJLZ-T7A operate with only one buck converter enabled while the other is disabled?
Yes, the ISL9307IRTAAJLZ-T7A allows independent operation: DCD1 and DCD2 can be enabled or disabled separately via ENDCD1 and ENDCD2. When disabled, each buck channel enters shutdown mode (ISD ≤ 5 µA) and actively discharges its output via the internal 115Ω bleed resistor, preventing floating rail conditions.
Is the 4mm×4mm TQFN package of the ISL9307IRTAAJLZ-T7A RoHS compliant and lead-free?
Yes, the ISL9307IRTAAJLZ-T7A uses Intersil's Pb-free plastic packaging with 100% matte tin plating (e3 termination finish), fully compliant with RoHS Directive 2011/65/EU and compatible with both SnPb and Pb-free reflow processes per IPC/JEDEC J-STD-020 moisture sensitivity level requirements.
ISL9307IRTAAJLZ-T7A 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:
- 2.8V, 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)
ISL9307IRTAAJLZ-T7A FAQ
1.How can I place an order for ISL9307IRTAAJLZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9307IRTAAJLZ-T7A 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 ISL9307IRTAAJLZ-T7A reliable?
The price and inventory of ISL9307IRTAAJLZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9307IRTAAJLZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9307IRTAAJLZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9307IRTAAJLZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9307IRTAAJLZ-T7A?
ISL9307IRTAAJLZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9307IRTAAJLZ-T7A 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 ISL9307IRTAAJLZ-T7A?
For technical support, including ISL9307IRTAAJLZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9307IRTAAJLZ-T7A requirements.
6.How does Aetrix verify that ISL9307IRTAAJLZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9307IRTAAJLZ-T7A 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 ISL9307IRTAAJLZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9307IRTAAJLZ-T7A?
All ISL9307IRTAAJLZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9307IRTAAJLZ-T7A, 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 ISL9307IRTAAJLZ-T7A part is unused and in its original packaging.
Return procedure for ISL9307IRTAAJLZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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