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Renesas ISL9307IRTAANCZ-T7A
- Part No.:
- ISL9307IRTAANCZ-T7A
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
ISL9307IRTAANCZ-T7A.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:727
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Product details
Overview
ISL9307IRTAANCZ-T7A from Renesas Electronics (formerly Intersil) is a dual-buck + dual-LDO mini-PMIC for single-cell Li-ion/Li-polymer battery-powered systems. It integrates two 3MHz, 1500mA synchronous step-down converters (DCD1/DCD2) and two 300mA low-input LDOs (LDO1/LDO2), with factory-fixed outputs of 3.3V and 1.8V respectively, operating across -40°C to +85°C.
For engineers reviewing the ISL9307IRTAANCZ-T7A datasheet, ISL9307IRTAANCZ-T7A pinout, ISL9307IRTAANCZ-T7A application, or ISL9307IRTAANCZ-T7A equivalent, key selection criteria include its 3MHz switching frequency enabling ultra-small external passives, independent enable pins per channel for precise power sequencing, and integrated active output discharge for controlled rail shutdown in portable microprocessor power domains.
Technical Context
The ISL9307IRTAANCZ-T7A implements peak-current-mode PWM control for both buck converters, delivering fast transient response and cycle-by-cycle current limiting up to 1500mA per channel. Under light load, it enters pulse-skipping mode-triggered after 16 consecutive zero-crossing detection cycles-to reduce quiescent current to 50μA (typ) and maximize battery runtime.
LDO1 and LDO2 operate from 1.5V to 5.5V input, support 300mA output, and feature 55dB PSRR at 1kHz and 45µVRMS output noise (10Hz–100kHz). Each regulator includes undervoltage lockout (1.41V rising threshold), thermal shutdown (155°C), and internal current limiting (425mA typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 3.0MHz ±0.4MHz - enables use of 1.5µH inductors and 1µF/10µF ceramic capacitors, reducing solution footprint by >40% vs 1MHz designs. |
| Buck Output Current | 1500mA per channel - supports core logic rails for ARM Cortex-A/M series processors and application SoCs. |
| LDO Output Current | 300mA per channel - sufficient for I/O, memory, or peripheral voltage domains requiring low-noise, high-PSRR regulation. |
| Fixed Output Voltages | LDO1 = 3.3V, LDO2 = 1.8V - factory-set, eliminating external feedback resistors and simplifying layout for dual-rail applications. |
| Quiescent Current | 50μA (typ) in skip mode - extends battery life in standby/sleep states of smartphones and wearables. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade portable electronics including handheld medical and test equipment. |
| Package | 4mm × 4mm, 16-lead TQFN with exposed thermal pad - provides low θJA (40.2°C/W) and supports high-density PCB layouts. |
Pinout & Package
ISL9307IRTAANCZ-T7A uses 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 thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINDCD1 | Main input for buck converter DCD1 and internal circuitry supply | Accepts 2.5V–5.5V; powers all digital/analog blocks; requires local 10µF input capacitor. |
| FB1 | Feedback node for DCD1 output regulation | Connected directly to DCD1 output (fixed version); sets 0.8V reference point for closed-loop control. |
| ENDCD1 | Enable control for DCD1 | Active-high logic (1.4V min); allows startup delay and sequencing with other rails. |
| ENLDO1 | Enable control for LDO1 | Active-high logic (1.4V min); independent control enables staggered power-up of 3.3V domain. |
| VINLDO | Shared input for LDO1 and LDO2 | Accepts 1.5V–5.5V; may be supplied from battery or DCD1/DCD2 output for cascaded regulation. |
| VOLDO1 | Fixed 3.3V output of LDO1 | No external components required; delivers regulated 3.3V at up to 300mA with <±3% accuracy. |
| VOLDO2 | Fixed 1.8V output of LDO2 | No external components required; optimized for low-voltage I/O or memory interfaces. |
| ENLDO2 | Enable control for LDO2 | Active-high logic (1.4V min); enables independent control of 1.8V rail timing. |
| GNDLDO | Power ground for both LDOs | Must be connected to clean analog ground plane; separate from buck power grounds to minimize noise coupling. |
| ENDCD2 | Enable control for DCD2 | Active-high logic (1.4V min); supports independent sequencing of second buck rail (e.g., DDR or GPU core). |
| FB2 | Feedback node for DCD2 output regulation | Connected directly to DCD2 output (fixed version); identical 0.8V reference as FB1. |
| VINDCD2 | Main input for buck converter DCD2 | Accepts 2.3V–VINDCD1; supports asymmetric input configurations for multi-rail optimization. |
| SW2 | Switching node for DCD2 | Connects to inductor; high di/dt node requiring short, wide trace routing and separation from sensitive analog signals. |
| GNDDCD2 | Power ground for DCD2 | Low-impedance return path for DCD2 high-side/low-side FETs; must tie to E-pad via multiple vias. |
| GNDDCD1 | Power ground for DCD1 | Low-impedance return path for DCD1 high-side/low-side FETs; isolated from GNDDCD2 in layout to prevent ground bounce. |
| SW1 | Switching node for DCD1 | Connects to inductor; same high-noise constraints as SW2; requires tight loop with COUT and PGND. |
Key Features
| Feature | Design Value |
|---|---|
| 3MHz PWM switching | Enables 1.5µH inductors and 1µF ceramic output caps-reducing total BOM size and cost while maintaining <20mV ripple under full load. |
| Independent EN pins per regulator | Four dedicated enable inputs (ENDCD1/ENDCD2/ENLDO1/ENLDO2) allow programmable power-up/down sequencing without external logic or timers. |
| Active output discharge | Internal 115Ω bleeding resistor discharges DCD1/DCD2 outputs when disabled-preventing floating voltages and ensuring safe state transitions. |
| Integrated overcurrent & thermal protection | 2.5A peak current limit per buck channel and 155°C thermal shutdown with 30°C hysteresis ensure robust operation under fault conditions. |
| Low-noise LDOs with high PSRR | 55dB PSRR at 1kHz and 45µVRMS noise enable clean power for RF transceivers, ADCs, and precision analog circuits. |
Applications
| Smartphone Application Processor Core | Portable Medical Sensor Hub |
|---|---|
Use Scenario: Powers ARM Cortex-A73/A76 CPU cores and GPU clusters in LTE/5G smartphones using single Li-ion battery input. IC Role / Device Role / Timing Role: Dual buck converters deliver 1.2V/1.0V core voltages with dynamic voltage scaling; dual LDOs supply 3.3V I/O and 1.8V memory interface. Use Value: 3MHz switching minimizes inductor size (<2.0mm² footprint), while independent EN pins enable precise sequencing aligned with SoC boot requirements. | Use Scenario: Supplies mixed-signal sensor fusion platform (ECG, SpO₂, accelerometer) in battery-operated wearable diagnostic devices. IC Role / Device Role / Timing Role: DCD1 powers 1.8V analog front-end; DCD2 supplies 1.2V digital controller; LDO1/LDO2 provide ultra-low-noise 3.3V and 1.8V rails for ADC reference and communication PHYs. Use Value: 45µVRMS LDO noise and 55dB PSRR ensure <12-bit ENOB in 24-bit ADC measurements without external filtering. |
| Industrial Handheld Terminal | Wireless IoT Edge Node |
Use Scenario: Powers barcode scanner engine, display driver, and secure MCU in ruggedized warehouse terminals operating across -30°C to +70°C ambient. IC Role / Device Role / Timing Role: DCD1 drives 3.3V display backlight; DCD2 supplies 1.2V application processor; LDO1/LDO2 power 3.3V UART and 1.8V crypto module. Use Value: -40°C to +85°C qualification and 50μA skip-mode IQ extend operational time between charges in intermittent-use environments. | Use Scenario: Powers sub-GHz LoRaWAN node with ultra-low-power MCU, SX1276 transceiver, and environmental sensors on coin-cell or small Li-ion battery. IC Role / Device Role / Timing Role: DCD1 supplies 3.3V MCU rail; DCD2 powers 1.8V RF section; LDO1/LDO2 deliver stable 3.3V/1.8V for precision temperature/humidity sensing. Use Value: Active discharge prevents residual voltage hold-up during deep-sleep wake cycles, reducing system-level leakage by >90% vs passive RC decay. |
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 |
|---|---|---|---|
| TPS65023BRSBR | 3MHz buck switching; fixed 3.3V/1.8V LDOs; but only 1000mA buck output per channel and no active discharge. | Lower current capability limits use in high-performance application processors; lacks active discharge for strict rail control. | Select when lower cost and proven TI ecosystem outweigh need for 1500mA buck current and active discharge. |
| MAX8646ETE+T | 2.25MHz buck switching; adjustable LDO outputs; 1200mA buck current; includes I²C interface for dynamic voltage scaling. | Requires external resistors for LDO setpoints; I²C adds complexity but enables real-time V/F scaling in adaptive systems. | Select when software-controlled voltage adjustment is required and 1200mA buck current suffices for target SoC. |
Compared with TPS65023BRSBR and MAX8646ETE+T, the ISL9307IRTAANCZ-T7A delivers higher 1500mA buck current per channel, factory-fixed LDO outputs eliminating external components, and integrated active discharge-making it optimal for space-constrained, high-reliability portable designs where layout simplicity and deterministic shutdown behavior are critical.
Availability
ISL9307IRTAANCZ-T7A is available at Aetrix Electronics and suitable for smartphone power management, portable medical instrumentation, industrial handheld terminals, and wireless IoT edge nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL9307IRTAANCZ-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
Renesas Electronics Corporation is a global leader in high-performance analog and embedded solutions, formed through the acquisition of Intersil in 2017. The company specializes in power management, timing, and interface ICs for mobile, industrial, and automotive markets.
The ISL9307IRTAANCZ-T7A belongs to Renesas' mini-PMIC product line, designed specifically for compact, battery-powered portable electronics requiring highly integrated, low-quiescent-current, and thermally efficient multi-rail power solutions.
FAQ
What is the switching frequency of the ISL9307IRTAANCZ-T7A and why does it matter?
The ISL9307IRTAANCZ-T7A operates at a nominal 3.0MHz switching frequency, with a tolerance of ±0.4MHz. This high frequency allows the use of miniature 1.5µH inductors and low-ESR ceramic capacitors (e.g., 1µF input, 10µF output), significantly reducing total solution size and cost. It also improves transient response and enables tighter output voltage regulation in space-constrained portable designs such as smartphones and wearables. The ISL9307IRTAANCZ-T7A maintains this frequency across input voltage and load variations within specification.
Does the ISL9307IRTAANCZ-T7A require external feedback resistors for its LDO outputs?
No, the ISL9307IRTAANCZ-T7A does not require external feedback resistors for its LDO outputs. LDO1 is factory-set to 3.3V and LDO2 to 1.8V-both are fixed-output variants. This eliminates external components, reduces BOM count, and removes layout sensitivity associated with feedback traces. The ISL9307IRTAANCZ-T7A achieves ±3% output voltage accuracy over temperature and load without trimming or calibration.
How does the ISL9307IRTAANCZ-T7A manage power sequencing between its four regulators?
The ISL9307IRTAANCZ-T7A provides four independent enable pins-ENDCD1, ENDCD2, ENLDO1, and ENLDO2-each with active-high logic (1.4V min threshold). This allows precise, hardware-based power sequencing without external controllers. For example, ENLDO1 can be asserted after DCD1 stabilizes to supply 3.3V I/O before enabling a downstream device. The ISL9307IRTAANCZ-T7A supports configurable startup delays via RC networks on these pins, ensuring reliable boot in complex SoC systems.
What protection features are built into the ISL9307IRTAANCZ-T7A?
The ISL9307IRTAANCZ-T7A integrates overcurrent protection (2.5A peak limit per buck channel), thermal shutdown (155°C trip with 30°C hysteresis), undervoltage lockout (2.2V on VINDCD1, 1.41V on VINLDO), and short-circuit protection for both buck converters. It also features active output discharge via a 115Ω internal resistor when DCD1/DCD2 are disabled. These protections operate autonomously without firmware or external supervision, ensuring robustness in unattended portable and industrial applications.
Can the ISL9307IRTAANCZ-T7A operate from a single Li-ion battery throughout its full discharge range?
Yes, the ISL9307IRTAANCZ-T7A supports input voltages from 2.5V to 5.5V on VINDCD1/VINDCD2 and 1.5V to 5.5V on VINLDO, covering the full discharge curve of a single Li-ion or Li-polymer cell (typically 4.2V down to ~2.8V). Its low-dropout operation-enabled by 100% duty-cycle mode and low RDS(on) P-channel MOSFETs-maintains regulation even near end-of-discharge, extending usable battery capacity. The ISL9307IRTAANCZ-T7A remains fully functional across the entire -40°C to +85°C industrial temperature range.
ISL9307IRTAANCZ-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)
ISL9307IRTAANCZ-T7A FAQ
1.How can I place an order for ISL9307IRTAANCZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9307IRTAANCZ-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 ISL9307IRTAANCZ-T7A reliable?
The price and inventory of ISL9307IRTAANCZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9307IRTAANCZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9307IRTAANCZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9307IRTAANCZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9307IRTAANCZ-T7A?
ISL9307IRTAANCZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9307IRTAANCZ-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 ISL9307IRTAANCZ-T7A?
For technical support, including ISL9307IRTAANCZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9307IRTAANCZ-T7A requirements.
6.How does Aetrix verify that ISL9307IRTAANCZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9307IRTAANCZ-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 ISL9307IRTAANCZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9307IRTAANCZ-T7A?
All ISL9307IRTAANCZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9307IRTAANCZ-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 ISL9307IRTAANCZ-T7A part is unused and in its original packaging.
Return procedure for ISL9307IRTAANCZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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