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Renesas ISL9307IRTAAJLZ-T
- Part No.:
- ISL9307IRTAAJLZ-T
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
ISL9307IRTAAJLZ-T.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,072
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Product details
Overview
ISL9307IRTAAJLZ-T 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). Its fixed LDO outputs are 2.8V and 2.9V, input voltage range spans 2.5–5.5V for buck inputs and 1.5–5.5V for LDO inputs, and it operates across –40°C to +85°C in a 4mm×4mm TQFN-16 package.
For engineers reviewing the ISL9307IRTAAJLZ-T datasheet, ISL9307IRTAAJLZ-T pinout, ISL9307IRTAAJLZ-T application, or ISL9307IRTAAJLZ-T equivalent, this page delivers verified technical context, exact pin functions, real-world power sequencing use cases, and validated alternative options for portable microprocessor rail generation.
Technical Context
The ISL9307IRTAAJLZ-T implements peak-current-mode PWM control for both DCD1 and DCD2, enabling fast transient response and pulse-by-pulse current limiting up to 1500mA per channel. It supports skip-mode operation under light load to reduce quiescent current to 50μA (typ) with both buck converters active.
LDO1 and LDO2 feature factory-fixed 2.8V and 2.9V outputs, 125mV dropout at 300mA (for VO ≤ 2.1V), and 55dB PSRR at 1kHz. All four channels (DCD1/DCD2/LDO1/LDO2) have independent enable pins for precise power sequencing in multi-rail applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Buck Input Range | 2.5V to 5.5V - supports single-cell Li-ion (3.0–4.2V typical) with 0.5V headroom margin for PCB drop |
| LDO Input Range | 1.5V to 5.5V - enables direct battery or buck output powering of LDOs without intermediate regulation |
| Buck Switching Frequency | 2.6–3.4MHz (typ 3MHz) - permits use of 1.5µH inductors and compact 0603/0805 ceramic capacitors |
| LDO Output Voltages | Fixed 2.8V and 2.9V - factory-set, no external feedback resistors required for these outputs |
| Quiescent Current | 50μA (typ) with both bucks in skip mode - extends battery runtime in standby/sleep states |
| Thermal Shutdown | 155°C threshold with 30°C hysteresis - protects die during sustained overload or poor PCB thermal design |
| Package | 4mm × 4mm TQFN-16 with exposed thermal pad - requires 9-via thermal land pattern per datasheet Figure 4 |
Pinout & Package
ISL9307IRTAAJLZ-T uses a 4mm×4mm 16-lead TQFN package (JEDEC MO220K, pkg drawing L16.4X4G) with an exposed E-pad for thermal dissipation. Pin numbering follows standard top-view orientation with pin 1 at top-left corner adjacent to index area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VINDCD1 | Buck converter DCD1 input supply | Primary power source for DCD1 and internal digital/analog circuitry; must be decoupled with ≥10µF capacitor |
| 2 FB1 | DCD1 feedback node | Connects to voltage divider for adjustable outputs; tied directly to VOLDO1 for fixed-output versions like ISL9307IRTAAJLZ-T |
| 3 ENDCD1 | DCD1 enable control | Active-high logic; 1.4V min high, 0.4V max low; used for startup sequencing with delay relative to other rails |
| 4 ENLDO1 | LDO1 enable control | Active-high logic; independent control allows staggered power-up of 2.8V domain (e.g., I/O or memory interface) |
| 5 VINLDO | LDO1/LDO2 common input | Shared input for both LDOs; can be sourced from battery or DCD1/DCD2 output; UVLO threshold 1.41V (rising) |
| 6 VOLDO1 | LDO1 regulated output | Fixed 2.8V output (per ordering code J L Z); supplies stable voltage to noise-sensitive analog or interface circuits |
| 7 VOLDO2 | LDO2 regulated output | Fixed 2.9V output (per ordering code J L Z); provides dedicated low-noise rail for RF bias or sensor signal conditioning |
| 8 ENLDO2 | LDO2 enable control | Active-high logic; enables independent activation of 2.9V rail, supporting dynamic power gating in portable systems |
| 9 GNDLDO | LDO power ground | Dedicated ground return for LDO1/LDO2; must be connected to system ground via low-impedance path |
| 10 ENDCD2 | DCD2 enable control | Active-high logic; coordinates sequencing with DCD1 and LDOs to meet processor core boot timing requirements |
| 11 FB2 | DCD2 feedback node | Connects to voltage divider for adjustable outputs; tied directly to VOLDO2 for fixed-output versions |
| 12 VINDCD2 | Buck converter DCD2 input supply | Input for second buck; accepts 2.3V to VINDCD1 - supports asymmetric input sourcing (e.g., separate battery tap) |
| 13 SW2 | DCD2 switching node | High-frequency switching point connecting to inductor; requires short, wide trace to minimize EMI and losses |
| 14 GNDDCD2 | DCD2 power ground | Power return for DCD2; must be joined to GNDDCD1 and GNDLDO near E-pad for optimal noise isolation |
| 15 GNDDCD1 | DCD1 power ground | Power return for DCD1; forms part of critical high-current loop with VINDCD1, SW1, and CIN |
| 16 SW1 | DCD1 switching node | High-frequency switching point connecting to inductor; routed away from FB/Sense traces to prevent coupling |
| E-pad | Exposed thermal pad | Must be soldered to solid ground plane with ≥9 thermal vias (0.3mm diameter) per datasheet Figure 4 |
Key Features
| Feature | Design Value |
|---|---|
| 3MHz synchronous buck operation | Enables use of 1.5µH inductors and small 0603/0805 MLCCs, reducing solution footprint by >40% vs 1MHz designs |
| Independent enable pins per channel | Supports programmable power-up/down sequencing for multi-core SoCs requiring strict voltage ramp order (e.g., core before I/O) |
| Active output discharge (115Ω bleed) | Forces rapid discharge of DCD1/DCD2 outputs when disabled, preventing floating rails that could cause latch-up in downstream logic |
| Low-dropout LDOs with 55dB PSRR | Suppresses switching noise from buck stages, delivering clean 2.8V/2.9V rails for RF transceivers or ADC reference supplies |
| Thermal shutdown with 30°C hysteresis | Prevents thermal runaway during sustained overload while allowing automatic recovery once die cools below 130°C |
Applications
| Smartphone Application Processor Core | Portable Media Player Audio Codec |
|---|---|
Use Scenario: Powering ARM Cortex-A series application processor cores requiring tightly regulated 1.2V–1.4V rails with fast transient response during burst-mode execution. IC Role / Device Role / Timing Role: DCD1 and DCD2 deliver high-efficiency, dynamically scalable core and GPU voltages; LDO1 (2.8V) powers I/O interfaces; LDO2 (2.9V) supplies DDR termination. Use Value: 3MHz switching and skip mode maintain >85% efficiency at 10mA load, extending standby time; independent EN pins align with SoC power-state transitions. | Use Scenario: Supplying low-noise bias to stereo audio DAC/ADC and headphone amplifier in battery-powered media players. IC Role / Device Role / Timing Role: LDO1 (2.8V) powers analog front-end circuitry; LDO2 (2.9V) supplies headphone driver stage; DCD1 powers digital baseband; DCD2 powers display backlight. Use Value: 45µVRMS output noise and 55dB PSRR ensure <105dB SNR in audio path; 125mV dropout at 300mA enables operation down to 3.0V battery voltage. |
| Li-ion–Powered Industrial Sensor Node | Handheld Medical Diagnostic Device |
Use Scenario: Providing isolated, low-quiescent power to ultra-low-power MCU, BLE radio, and precision analog sensor front-end in remote IoT nodes. IC Role / Device Role / Timing Role: DCD1 powers MCU core (1.8V); DCD2 powers BLE subsystem (3.3V); LDO1 (2.8V) supplies op-amp sensor signal chain; LDO2 (2.9V) powers reference voltage generator. Use Value: 50μA quiescent current in skip mode extends 200mAh battery life to >2 years in sleep mode; UVLO prevents brownout-induced firmware corruption. | Use Scenario: Delivering compliant, low-noise power to FDA-cleared ECG front-end, microcontroller, and OLED display in portable diagnostic tools. IC Role / Device Role / Timing Role: DCD1 powers 3.3V digital logic; DCD2 powers 1.8V FPGA fabric; LDO1 (2.8V) supplies ECG instrumentation amplifier; LDO2 (2.9V) powers precision ADC reference. Use Value: 2.9V LDO output matches common ADC reference ICs (e.g., REF3029); 1.5% output accuracy ensures measurement repeatability within clinical tolerance bands. |
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 | 3.3V/1.8V fixed LDO outputs; 1.5MHz switching; 2.7–5.5V input; 16-pin QFN | Lower switching frequency increases inductor size; lacks active output discharge; no 2.9V LDO option | Select when 1.5MHz operation is acceptable and 2.9V rail not required; verify thermal performance at 1500mA continuous load |
| RT8070ZSP | Adjustable LDO outputs only; 2.5–5.5V input; 2.5MHz switching; 16-pin QFN | No factory-fixed 2.8V/2.9V LDOs - requires external resistor networks; lower PSRR (45dB @ 1kHz) | Choose when flexible LDO voltage selection is needed and board space allows feedback resistors; confirm layout meets higher EMI sensitivity |
Compared with TPS65023BRSBR and RT8070ZSP, the ISL9307IRTAAJLZ-T delivers superior light-load efficiency via 3MHz skip mode, factory-configured 2.8V/2.9V LDOs eliminating BOM cost and layout area, and integrated active discharge for safer rail shutdown - making it optimal for space-constrained, battery-life–critical portable designs.
Availability
ISL9307IRTAAJLZ-T is available at Aetrix Electronics and suitable for smartphone application processors, portable medical devices, industrial sensor nodes, and handheld media players requiring stable component supply with full lifecycle support.
Supply support for ISL9307IRTAAJLZ-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
Intersil Corporation is a U.S.-based designer of high-performance analog semiconductors, specializing in power management and precision signal processing for mobile, computing, and industrial markets.
The ISL9307 product line targets compact, battery-powered portable electronics requiring integrated multi-rail power solutions with minimal external components and robust sequencing control.
FAQ
What are the fixed output voltages of LDO1 and LDO2 on the ISL9307IRTAAJLZ-T?
The ISL9307IRTAAJLZ-T has factory-programmed fixed LDO outputs: LDO1 delivers 2.8V and LDO2 delivers 2.9V, as indicated by the "JLZ" suffix in the ordering code. These voltages require no external feedback resistors and are optimized for I/O interface and analog sensor biasing in portable systems powered by single Li-ion cells.
Does the ISL9307IRTAAJLZ-T support power sequencing between its four output rails?
Yes, the ISL9307IRTAAJLZ-T provides independent enable pins (ENDCD1, ENDCD2, ENLDO1, ENLDO2) for each of its four regulators, enabling precise startup and shutdown sequencing. This allows designers to meet strict SoC power-on requirements - for example, enabling DCD1 first for core voltage, then LDO1 for I/O, followed by DCD2 and LDO2 - all using simple GPIO control without external timers.
What is the minimum input voltage required for the ISL9307IRTAAJLZ-T's buck converters to maintain regulation?
The ISL9307IRTAAJLZ-T's DCD1 and DCD2 buck converters require a minimum input voltage of 2.5V (VINDCD1/VINDCD2) to operate in normal PWM mode. Below this, undervoltage lockout disables the channel. In dropout mode (100% duty cycle), regulation continues down to VO + (ILOAD × RDS(ON)_PCH), where RDS(ON) is as low as 0.14Ω at 3.6V input.
How does the ISL9307IRTAAJLZ-T reduce output voltage ripple in noise-sensitive applications?
The ISL9307IRTAAJLZ-T minimizes output ripple through 3MHz switching (reducing fundamental energy), integrated skip-mode operation (suppressing subharmonics), and LDO post-regulation. Its LDOs provide 55dB PSRR at 1kHz and 45µVRMS broadband noise, making ISL9307IRTAAJLZ-T suitable for powering precision ADC references and RF synthesizers without additional filtering.
Is thermal management support provided for the ISL9307IRTAAJLZ-T in high-current operation?
Yes, the ISL9307IRTAAJLZ-T includes built-in thermal protection with a 155°C shutdown threshold and 30°C hysteresis, plus a thermally enhanced 4mm×4mm TQFN package with an exposed E-pad. The datasheet specifies a θJA of 40.2°C/W and recommends a 9-via thermal land pattern to maintain junction temperature below 125°C at 1500mA continuous load in typical PCB layouts.
ISL9307IRTAAJLZ-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:
- 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-T FAQ
1.How can I place an order for ISL9307IRTAAJLZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9307IRTAAJLZ-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 ISL9307IRTAAJLZ-T reliable?
The price and inventory of ISL9307IRTAAJLZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9307IRTAAJLZ-T is usually 5 days.
3.What payment methods are accepted for ISL9307IRTAAJLZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9307IRTAAJLZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9307IRTAAJLZ-T?
ISL9307IRTAAJLZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9307IRTAAJLZ-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 ISL9307IRTAAJLZ-T?
For technical support, including ISL9307IRTAAJLZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9307IRTAAJLZ-T requirements.
6.How does Aetrix verify that ISL9307IRTAAJLZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9307IRTAAJLZ-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 ISL9307IRTAAJLZ-T meets industry standards.
7.What is the process for return or replacement of ISL9307IRTAAJLZ-T?
All ISL9307IRTAAJLZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9307IRTAAJLZ-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 ISL9307IRTAAJLZ-T part is unused and in its original packaging.
Return procedure for ISL9307IRTAAJLZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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