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Renesas ISL9307IRTAANLZ-T7A
- Part No.:
- ISL9307IRTAANLZ-T7A
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
ISL9307IRTAANLZ-T7A.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:480
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Product details
Overview
ISL9307IRTAANLZ-T7A from Intersil is a dual-output mini-PMIC integrating two 1500mA, 3MHz synchronous step-down converters (DCD1/DCD2) and two 300mA low-dropout linear regulators (LDO1/LDO2), designed for single Li-ion/Li-polymer battery-powered microprocessor systems. It delivers fixed 3.3V and 2.9V LDO outputs, supports 2.5–5.5V input for buck stages, and operates across –40°C to +85°C.
For engineers reviewing the ISL9307IRTAANLZ-T7A datasheet, ISL9307IRTAANLZ-T7A pinout, ISL9307IRTAANLZ-T7A application, or ISL9307IRTAANLZ-T7A equivalent, key selection considerations include its dual-buck + dual-LDO integration, 3MHz switching frequency enabling compact 1.5µH inductors, factory-set LDO voltages, independent enable pins for power sequencing, and 4mm×4mm TQFN-16 package with exposed thermal pad.
Technical Context
The ISL9307IRTAANLZ-T7A implements peak-current-mode PWM control for both buck converters, supporting pulse-skipping mode under light load to reduce quiescent current to 50µA (typ). Its feedback regulation voltage is tightly specified at 0.8V ±15mV, enabling precise output setting via external resistor dividers or direct connection for fixed-output variants like this one.
All four channels-DCD1, DCD2, LDO1, and LDO2-feature independent enable inputs (ENDCD1/ENDCD2/ENLDO1/ENLDO2) with TTL-compatible logic thresholds (1.4V high, 0.4V low), allowing flexible startup sequencing. The device integrates undervoltage lockout (2.2V typ on VINDCD1, 1.4V typ on VINLDO), thermal shutdown (155°C), and overcurrent protection with 2.5A typical peak current limit per buck stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range (Buck) | 2.5V to 5.5V - supports direct connection to single-cell Li-ion (2.7–4.2V nominal) with margin for full discharge and charging peaks. |
| Switching Frequency | 3.0MHz ±0.4MHz - enables use of 1.5µH inductors and small ceramic capacitors, reducing solution footprint and EMI filter complexity. |
| LDO Output Voltages | 3.3V (LDO1) and 2.9V (LDO2) - factory pre-set fixed outputs; no external feedback required, simplifying layout and BOM. |
| Buck Output Current | 1500mA per channel - sufficient for core logic or memory rails in smartphones and portable instruments. |
| LDO Output Current | 300mA per channel - suitable for I/O, analog, or peripheral supplies requiring low-noise, high PSRR regulation. |
| Quiescent Current (Skip Mode) | 50µA (typ) with both bucks enabled - extends battery runtime during standby or low-activity states. |
| Package | 4mm × 4mm, 16-lead TQFN with exposed thermal pad - provides low thermal resistance (θJA = 40.2°C/W) and space-efficient integration. |
Pinout & Package
The ISL9307IRTAANLZ-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 PCB ground for thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINDCD1 (Pin 1) | Main input supply for DCD1 and internal circuitry | Accepts 2.5–5.5V; powers all digital/analog blocks; requires local 10µF input capacitor. |
| FB1 (Pin 2) | Feedback node for DCD1 | Connected directly to DCD1 output for fixed-voltage operation (no divider needed); 0.8V regulation reference. |
| ENDCD1 (Pin 3) | Enable control for DCD1 | TTL-compatible input; high = active; used for controlled power-up sequencing with delay relative to other rails. |
| ENLDO1 (Pin 4) | Enable control for LDO1 | Independent enable for 3.3V LDO; allows staggered activation to manage inrush and system boot order. |
| VINLDO (Pin 5) | Shared input for LDO1 and LDO2 | 1.5–5.5V range; may be supplied from battery or from DCD1/DCD2 output; requires separate 1µF bypass cap. |
| VOLDO1 (Pin 6) | 3.3V LDO1 output | Factory-set fixed 3.3V output; delivers up to 300mA with <250mV dropout at full load. |
| VOLDO2 (Pin 7) | 2.9V LDO2 output | Factory-set fixed 2.9V output; optimized for low-noise analog or interface rails; 45µVRMS noise (10Hz–100kHz). |
| ENLDO2 (Pin 8) | Enable control for LDO2 | Independent enable for 2.9V LDO; supports selective powering of subsystems without affecting other rails. |
| GNDLDO (Pin 9) | Power ground for both LDOs | Dedicated ground return path minimizes coupling between LDOs and switching sections; must connect to system ground plane. |
| ENDCD2 (Pin 10) | Enable control for DCD2 | Enables second 1500mA buck; synchronized but independently controllable for multi-rail sequencing. |
| FB2 (Pin 11) | Feedback node for DCD2 | Direct-connected to DCD2 output for fixed operation; identical 0.8V reference as FB1. |
| VINDCD2 (Pin 12) | Input supply for DCD2 | 2.3V to VINDCD1 range; supports asymmetric input configurations or shared input with DCD1. |
| SW2 (Pin 13) | DCD2 switching node | High dv/dt node; connects to inductor; requires short, wide trace and separation from sensitive analog signals. |
| GNDDCD2 (Pin 14) | Power ground for DCD2 | Dedicated ground return for DCD2 power loop; critical for EMI control and transient response. |
| GNDDCD1 (Pin 15) | Power ground for DCD1 | Dedicated ground return for DCD1 power loop; kept separate from GNDLDO to prevent noise injection into LDOs. |
| SW1 (Pin 16) | DCD1 switching node | High-frequency switching node; routed with minimal loop area to reduce radiated emissions. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3MHz synchronous buck converters | Enables ultra-compact DC/DC solutions using 1.5µH inductors and 10µF ceramic output caps-reducing board area by >40% vs. 500kHz alternatives. |
| Independent enable pins for all four regulators | Supports precise power sequencing (e.g., LDOs before bucks or vice versa) without external timing components or controllers. |
| Factory-set fixed LDO outputs (3.3V / 2.9V) | Eliminates external feedback resistors and associated layout sensitivity, improving production yield and long-term voltage stability. |
| Active output discharge (115Ω bleed resistor) | Ensures rapid, controlled discharge of DCD1/DCD2 outputs when disabled-preventing floating voltages and enabling safe rail shutdown. |
| Thermal shutdown with 30°C hysteresis | Protects against sustained overload or poor heatsinking; resumes operation only after die cools to ~130°C, preventing thermal cycling damage. |
Applications
| Smartphone Core Power | Portable Media Player I/O Supply |
|---|---|
Use Scenario: Powering application processor cores and memory interfaces in compact smartphone designs with single-cell Li-ion battery. IC Role / Device Role / Timing Role: ISL9307IRTAANLZ-T7A delivers tightly regulated 3.3V (LDO1) and 2.9V (LDO2) for I/O and analog subsystems while its dual 1500mA bucks supply dynamic core/memory rails. Use Value: Integrated sequencing and low-quiescent skip mode extend standby time; 3MHz switching avoids AM radio band interference. | Use Scenario: Providing clean, sequenced power to audio DACs, display drivers, and USB PHY in portable media players. IC Role / Device Role / Timing Role: ISL9307IRTAANLZ-T7A uses LDO1 (3.3V) for analog audio paths and LDO2 (2.9V) for display bias, while bucks handle high-current digital logic. Use Value: 45µVRMS LDO noise and 55dB PSRR at 1kHz ensure low-distortion audio playback; independent enables prevent pop/click during power-up. |
| DSP-Based Portable Instrument | Li-ion-Powered Industrial Sensor Node |
Use Scenario: Supplying mixed-signal DSP, ADC, and communication ICs in handheld test equipment powered by removable Li-ion packs. IC Role / Device Role / Timing Role: ISL9307IRTAANLZ-T7A powers DSP core (via DCD1), memory (DCD2), precision analog front-end (LDO1), and RF transceiver (LDO2) with isolated grounds. Use Value: Dedicated GNDDCD1/GNDDCD2/GNDLDO pins minimize cross-talk; thermal shutdown protects against enclosure overheating during extended measurements. | Use Scenario: Enabling long-life, maintenance-free operation of wireless sensor nodes using primary or rechargeable Li-ion cells. IC Role / Device Role / Timing Role: ISL9307IRTAANLZ-T7A powers ultra-low-power MCU (LDO2 @ 2.9V), sensor interface (LDO1 @ 3.3V), and RF module (DCD2), with DCD1 held in skip mode for background tasks. Use Value: 50µA typical quiescent current in skip mode extends battery life to >5 years in sleep-dominated duty cycles; UVLO prevents brownout resets below 2.2V. |
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 | 3.3V/1.8V/1.2V triple LDO + dual 600mA bucks; 2.5–6V input; 2.25MHz switching; QFN-32 package | Higher LDO count but lower buck current; larger footprint; lacks independent LDO enable pins | Choose for systems needing three LDOs and lower cost, but accept reduced buck capability and less flexible sequencing. |
| RT8059ZSP | Dual 2A bucks + single 300mA LDO; 2.5–5.5V input; 1.5MHz switching; WQFN-20 package | Single LDO only; higher buck current; lower switching frequency increases inductor size; no LDO enable control | Choose when primary need is high-current buck regulation and LDO is secondary; not suitable for dual-LDO sequencing-critical designs. |
Compared with TPS65023RSBR and RT8059ZSP, the ISL9307IRTAANLZ-T7A uniquely combines independent enables for all four regulators, fixed 3.3V/2.9V LDOs eliminating feedback components, and 3MHz operation enabling smallest passive component sizes-making it optimal for space-constrained, battery-sensitive portable systems requiring precise rail control.
Availability
ISL9307IRTAANLZ-T7A is available at Aetrix Electronics and suitable for smartphone core power, portable media player I/O supply, DSP-based portable instrument, and Li-ion-powered industrial sensor node applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9307IRTAANLZ-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 processing ICs for mobile, computing, and industrial markets.
The ISL9307IRTAANLZ-T7A belongs to Intersil's mini-PMIC product line, engineered specifically for space- and efficiency-critical battery-powered devices such as smartphones and portable instrumentation-emphasizing integration, low quiescent current, and robust thermal management.
FAQ
What are the fixed output voltages of the LDOs in ISL9307IRTAANLZ-T7A?
The ISL9307IRTAANLZ-T7A features factory pre-set fixed LDO outputs: LDO1 delivers 3.3V and LDO2 delivers 2.9V. These values are laser-trimmed during manufacturing and require no external feedback components-simplifying design and improving voltage accuracy over temperature and load.
Does ISL9307IRTAANLZ-T7A support power sequencing between its four regulators?
Yes, ISL9307IRTAANLZ-T7A provides independent enable pins (ENDCD1, ENDCD2, ENLDO1, ENLDO2) for each regulator, allowing precise control over startup order and timing. This eliminates the need for external sequencing ICs or RC delays, enabling reliable, repeatable power-up sequences in complex multi-rail systems.
What is the maximum supported input voltage for the buck converters in ISL9307IRTAANLZ-T7A?
The buck converters (DCD1 and DCD2) in ISL9307IRTAANLZ-T7A support an input voltage range of 2.5V to 5.5V. This accommodates full Li-ion battery operation (2.7–4.2V nominal, up to 4.35V charged) with safety margin, and permits direct connection to USB or wall adapter inputs when appropriate.
How does ISL9307IRTAANLZ-T7A reduce power consumption during light-load conditions?
ISL9307IRTAANLZ-T7A enters pulse-skipping mode under light load, reducing switching frequency and lowering quiescent current to 50µA (typ) with both bucks enabled. This significantly extends battery life in standby or intermittent-use scenarios without compromising regulation accuracy or transient response.
Is an external feedback resistor network required for ISL9307IRTAANLZ-T7A's buck converters?
No. ISL9307IRTAANLZ-T7A is a fixed-output variant where FB1 and FB2 pins are internally connected to their respective buck outputs. Per the datasheet, these pins must be directly tied to VODCD1 and VODCD2-no external resistor divider is needed, reducing component count and layout sensitivity.
ISL9307IRTAANLZ-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:
- 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)
ISL9307IRTAANLZ-T7A FAQ
1.How can I place an order for ISL9307IRTAANLZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9307IRTAANLZ-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 ISL9307IRTAANLZ-T7A reliable?
The price and inventory of ISL9307IRTAANLZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9307IRTAANLZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9307IRTAANLZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9307IRTAANLZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9307IRTAANLZ-T7A?
ISL9307IRTAANLZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9307IRTAANLZ-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 ISL9307IRTAANLZ-T7A?
For technical support, including ISL9307IRTAANLZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9307IRTAANLZ-T7A requirements.
6.How does Aetrix verify that ISL9307IRTAANLZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9307IRTAANLZ-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 ISL9307IRTAANLZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9307IRTAANLZ-T7A?
All ISL9307IRTAANLZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9307IRTAANLZ-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 ISL9307IRTAANLZ-T7A part is unused and in its original packaging.
Return procedure for ISL9307IRTAANLZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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