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Renesas ISL9307IRTAANLZ-T
- Part No.:
- ISL9307IRTAANLZ-T
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
ISL9307IRTAANLZ-T.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,953
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Product details
Overview
ISL9307IRTAANLZ-T from Renesas (formerly Intersil) is a dual-buck + dual-LDO mini-PMIC for battery-powered microprocessor power rails, integrating two 1500mA/3MHz synchronous step-down converters (DCD1/DCD2) and two 300mA low-input LDOs (LDO1/LDO2), with factory-fixed 3.3V and 2.9V outputs, operating from single Li-ion input (2.5–5.5V). It enables precise power sequencing via independent EN pins and supports skip-mode operation for extended battery life in portable electronics.
For engineers reviewing the ISL9307IRTAANLZ-T datasheet, ISL9307IRTAANLZ-T pinout, ISL9307IRTAANLZ-T application, or ISL9307IRTAANLZ-T equivalent, key selection considerations include its 4mm×4mm TQFN-16 package, 3.3V/2.9V fixed LDO outputs, 3MHz switching frequency enabling compact 1.5µH inductors, dual-channel enable control, and thermal shutdown at 155°C with 30°C hysteresis.
Technical Context
The ISL9307IRTAANLZ-T implements peak-current-mode PWM control for both buck converters, delivering fast transient response and pulse-by-pulse current limiting up to 1500mA per channel. Its skip-mode operation-triggered after 16 consecutive zero-crossing cycles-reduces light-load switching loss while maintaining regulation.
Each LDO accepts 1.5V–5.5V input and delivers 300mA with dropout as low as 80mV at 300mA for VOUT > 2.8V. The device features independent enable logic (1.4V high, 0.4V low), undervoltage lockout (2.2V on VINDCD1, 1.41V on VINLDO), and active output discharge via 115Ω internal bleeding resistor when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DCD Output Current | 1500mA per channel - supports core and I/O rail power for low-voltage microprocessors |
| LDO Output Current | 300mA per channel - sufficient for memory, interface, or sensor bias rails |
| Switching Frequency | 3.0MHz ±0.4MHz - enables use of 1.5µH inductors and reduces EMI filtering burden |
| LDO1/LDO2 Output | 3.3V / 2.9V fixed - factory-set, eliminating external feedback resistors for simplified layout |
| Quiescent Current | 50µA typ. 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 heatsinking |
| Package | 4mm × 4mm TQFN-16 with exposed thermal pad - supports high-power density PCB designs |
Pinout & Package
ISL9307IRTAANLZ-T is housed in a 4mm × 4mm, 16-lead Thin Quad Flat No-lead (TQFN) package with an exposed thermal pad (JEDEC MO220K, drawing L16.4X4G). The E-pad must be soldered to system ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINDCD1 | Buck converter DCD1 input & internal circuit supply | Accepts 2.5–5.5V; powers all internal digital/analog blocks |
| FB1 | DCD1 feedback node | Connected directly to DCD1 output for fixed 3.3V version (no divider needed) |
| ENDCD1 | DCD1 enable input | Active-high logic (1.4V min); controls startup timing for power sequencing |
| ENLDO1 | LDO1 enable input | Active-high logic; allows independent activation of 3.3V LDO rail |
| VINLDO | LDO1/LDO2 common input | 1.5–5.5V range; may be supplied from battery or DCD output |
| VOLDO1 | LDO1 output | Fixed 3.3V output; no external components required |
| VOLDO2 | LDO2 output | Fixed 2.9V output; decoupled from VOLDO1 for noise isolation |
| ENLDO2 | LDO2 enable input | Independent control of 2.9V rail; supports staggered power-up |
| GNDLDO | LDO power ground | Dedicated ground return for LDOs to minimize noise coupling into buck circuits |
| ENDCD2 | DCD2 enable input | Enables second buck channel; used for I/O or auxiliary processor rail |
| FB2 | DCD2 feedback node | Direct connection to DCD2 output for fixed 2.9V configuration |
| VINDCD2 | Buck converter DCD2 input | 2.3–VINDCD1 range; supports asymmetric input sourcing |
| SW2 | DCD2 switching node | Connects to inductor; high di/dt path requiring short, wide trace routing |
| GNDDCD2 | DCD2 power ground | Separate ground return for DCD2 to prevent switching noise injection into LDO paths |
| GNDDCD1 | DCD1 power ground | Isolated ground for DCD1; critical for minimizing ripple on sensitive analog supplies |
| SW1 | DCD1 switching node | High-frequency switching node; requires tight loop with inductor and input cap |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3MHz synchronous buck converters | Enables ultra-compact DC/DC design with 1.5µH inductors and minimal output capacitance |
| Independent enable pins per channel | Supports programmable power sequencing across four regulated rails (DCD1/DCD2/LDO1/LDO2) |
| Factory-fixed LDO outputs | Eliminates external feedback resistors for 3.3V and 2.9V rails, reducing BOM count and layout area |
| Active output discharge | 115Ω internal bleeding resistor discharges DCD outputs rapidly upon disable, preventing floating voltages |
| Thermal shutdown with hysteresis | 155°C trip and 130°C recovery ensures safe re-entry after overheating without oscillation |
| Low-noise LDO architecture | 45µVRMS output noise (10Hz–100kHz) and 55dB PSRR @ 1kHz suit noise-sensitive analog loads |
Applications
| Smartphone Application Processor Core | Mobile Baseband RF Power Amplifier Bias |
|---|---|
Use Scenario: Powers ARM Cortex-A series CPU cores requiring tightly regulated 1.2V/1.8V rails from single-cell Li-ion battery. IC Role / Device Role / Timing Role: Dual buck converters deliver high-efficiency core and GPU voltage; LDOs supply clean I/O and PLL reference voltages. Use Value: 3MHz switching minimizes inductor size; skip-mode extends standby time; fixed LDO outputs reduce component count and layout complexity. | Use Scenario: Supplies stable 2.9V bias to LTE/WCDMA power amplifier stages in smartphone RF front-end modules. IC Role / Device Role / Timing Role: LDO2 provides low-noise, high-PSRR 2.9V rail isolated from noisy buck switching domains. Use Value: 45µVRMS noise and 55dB PSRR suppress switching artifacts, improving EVM and ACLR performance. |
| Portable Medical Sensor Hub | Wearable Fitness Tracker MCU |
Use Scenario: Powers multi-sensor acquisition system (ECG, SpO₂, accelerometer) with separate analog, digital, and RF sections. IC Role / Device Role / Timing Role: DCD1 powers digital MCU; DCD2 powers analog front-end; LDO1/LDO2 supply precision ADC reference and Bluetooth radio. Use Value: Independent EN pins allow controlled wake-up sequence; thermal shutdown prevents damage during enclosure overheating. | Use Scenario: Delivers regulated power to ultra-low-power MCU, OLED display driver, and motion sensor in coin-cell–compatible wearable form factor. IC Role / Device Role / Timing Role: Buck converters handle high-current display backlight; LDOs provide quiet supply for sensor signal chain and BLE radio. Use Value: 50µA quiescent current in skip mode maximizes battery life; 4mm×4mm footprint fits constrained wearable PCB layouts. |
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 fixed LDOs; 1.5MHz switching; 1.2A buck channels; QFN-32 package | Higher pin count, lower switching frequency, different LDO voltage setpoints | Preferred when 1.2V/1.8V LDOs are required and board space permits larger package |
| RT8070ZSP | Dual 2A bucks + single 300mA LDO; 2.5MHz switching; 3mm×3mm WQFN-20; no dual-LDO option | Lacks second LDO; higher buck current but reduced rail flexibility | Selected when only one low-noise rail is needed and higher buck output current is critical |
Compared with TPS65023RSBR and RT8070ZSP, the ISL9307IRTAANLZ-T offers higher switching frequency (3MHz vs ≤2.5MHz) in a smaller 4mm×4mm footprint, with factory-matched 3.3V/2.9V LDOs ideal for systems needing asymmetric low-noise bias rails without external feedback networks.
Availability
ISL9307IRTAANLZ-T is available at Aetrix Electronics and suitable for smartphone power management, portable medical instrumentation, and wearable electronics requiring stable component supply with full lifecycle support.
Supply support for ISL9307IRTAANLZ-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 (acquired Intersil in 2017) is a global leader in high-performance analog and mixed-signal semiconductors, specializing in power management, interface, and timing solutions for mobile, industrial, and automotive markets.
The ISL9307 product line was designed specifically for compact, battery-powered portable electronics requiring integrated multi-rail power with minimal external components and robust thermal protection.
FAQ
What is the output voltage configuration of ISL9307IRTAANLZ-T?
The ISL9307IRTAANLZ-T features factory-programmed fixed outputs: DCD1 and DCD2 are adjustable via FB pins, while LDO1 delivers a fixed 3.3V and LDO2 a fixed 2.9V. No external feedback resistors are required for the LDOs, simplifying design and reducing component count. This configuration is confirmed in the Ordering Information table on page 4 of FN7931 Rev 3.00.
Does ISL9307IRTAANLZ-T support power sequencing between its four output rails?
Yes, ISL9307IRTAANLZ-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, 0.4V low), allowing external controllers or simple RC delays to stagger startup timing. This capability is explicitly documented in the Pin Descriptions section (page 3) and Figure 12 (4-channel power-up waveform).
What is the maximum input voltage rating for the LDO inputs on ISL9307IRTAANLZ-T?
The VINLDO pin on ISL9307IRTAANLZ-T supports an input voltage range of 1.5V to 5.5V, with the constraint that VINLDO must not exceed VINDCD1. This allows flexible sourcing-either directly from the battery or from one of the internal buck converter outputs. Absolute maximum rating for VINLDO is 6.5V, per the Absolute Maximum Ratings table on page 5.
How does ISL9307IRTAANLZ-T manage efficiency at light load conditions?
ISL9307IRTAANLZ-T enters pulse-skipping mode under light load, reducing switching frequency to minimize gate drive and switching losses. The device monitors SW node current zero-crossings and triggers skip mode after 16 consecutive zero crossings. Quiescent current drops to 50µA typical with both bucks enabled in this mode, significantly extending battery life in standby states.
Is thermal management supported in ISL9307IRTAANLZ-T, and what are the thresholds?
Yes, ISL9307IRTAANLZ-T integrates thermal shutdown with a trip threshold of 155°C and hysteresis of 30°C (recovery at ~130°C). This protects the IC during sustained overload or inadequate PCB heatsinking. The device uses a thermally enhanced TQFN-16 package with an exposed E-pad that must be soldered to a solid ground plane with ≥9 thermal vias, as specified in the Board Layout Recommendations (page 8).
ISL9307IRTAANLZ-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)
ISL9307IRTAANLZ-T FAQ
1.How can I place an order for ISL9307IRTAANLZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9307IRTAANLZ-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 ISL9307IRTAANLZ-T reliable?
The price and inventory of ISL9307IRTAANLZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9307IRTAANLZ-T is usually 5 days.
3.What payment methods are accepted for ISL9307IRTAANLZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9307IRTAANLZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9307IRTAANLZ-T?
ISL9307IRTAANLZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9307IRTAANLZ-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 ISL9307IRTAANLZ-T?
For technical support, including ISL9307IRTAANLZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9307IRTAANLZ-T requirements.
6.How does Aetrix verify that ISL9307IRTAANLZ-T is sourced from the original manufacturer or authorized distributors?
All ISL9307IRTAANLZ-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 ISL9307IRTAANLZ-T meets industry standards.
7.What is the process for return or replacement of ISL9307IRTAANLZ-T?
All ISL9307IRTAANLZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9307IRTAANLZ-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 ISL9307IRTAANLZ-T part is unused and in its original packaging.
Return procedure for ISL9307IRTAANLZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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