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Renesas ISL9307IRTAANFZ-T7A
- Part No.:
- ISL9307IRTAANFZ-T7A
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
ISL9307IRTAANFZ-T7A.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
ISL9307IRTAANFZ-T7A from Intersil is a dual-output mini-PMIC integrating two 3MHz, 1500mA synchronous step-down converters (DCD1/DCD2) and two 300mA low-input LDOs (LDO1/LDO2), designed for single Li-ion/Li-polymer battery-powered microprocessor systems requiring tightly regulated 3.3V and 2.5V rails. It supports power sequencing via independent enable pins and delivers >90% efficiency at full load with 50μA quiescent current in skip mode.
For engineers reviewing the ISL9307IRTAANFZ-T7A datasheet, ISL9307IRTAANFZ-T7A pinout, ISL9307IRTAANFZ-T7A application, or ISL9307IRTAANFZ-T7A equivalent, this page provides verified technical context, validated pin functions, confirmed fixed-output configuration (3.3V/2.5V), thermal shutdown behavior, and real-world power sequencing implementation details.
Technical Context
The ISL9307IRTAANFZ-T7A implements peak-current-mode PWM control for both buck converters, enabling fast transient response and pulse-by-pulse overcurrent protection. Its 3MHz switching frequency allows use of 1.5µH inductors and compact 0603/0805 capacitors while maintaining stable regulation under dynamic loads up to 1500mA per channel.
Each LDO operates from 1.5V–5.5V input and delivers factory-fixed 3.3V (LDO1) and 2.5V (LDO2) outputs with ≤200mV dropout at 300mA, supporting direct battery or buck-derived supply. Independent EN pins enable precise startup delay control for multi-rail sequencing in mobile SoC applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range (DCD1/DCD2) | 2.5V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V nominal) without external pre-regulation |
| Output Voltages (LDO1/LDO2) | Fixed 3.3V and 2.5V - no external feedback resistors required; reduces BOM count and layout area |
| Switching Frequency | 3.0MHz ±0.4MHz - enables ultra-compact passive component selection (e.g., 1.5µH inductors) |
| Quiescent Current (Skip Mode) | 50μA typical - extends battery runtime during light-load sleep states in portable devices |
| Thermal Shutdown Threshold | 155°C with 30°C hysteresis - protects against sustained overload or poor PCB thermal design |
| Package | 4mm × 4mm 16-pin TQFN - thermally enhanced exposed pad supports ≥1.5W power dissipation |
| Operating Temperature | −40°C to +85°C - qualified for industrial and consumer handheld environments |
Pinout & Package
ISL9307IRTAANFZ-T7A uses a 4mm × 4mm, 16-lead thin quad flat no-lead (TQFN) package with exposed thermal pad. The E-pad must be soldered to a solid ground plane with ≥9 thermal vias for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINDCD1 | DC-DC1 input supply and internal circuit power rail | Accepts 2.5–5.5V; powers all digital/analog blocks; requires local 10µF input capacitor |
| FB1 | DC-DC1 feedback node | Internally connected to fixed 3.3V output; not user-accessible in this variant - bypassed internally |
| ENDCD1 | DC-DC1 enable control | Active-high logic (1.4V threshold); enables power sequencing with external timing RC network |
| ENLDO1 | LDO1 enable control | Active-high logic; used to stagger startup after DCD1 stabilization for voltage rail ordering |
| VINLDO | LDO1/LDO2 common input | Accepts 1.5–5.5V; may be tied to battery or DCD1/DCD2 output; requires separate 1µF decoupling |
| VOLDO1 | LDO1 regulated output | Factory-set 3.3V ±3%; delivers up to 300mA with <200mV dropout at full load |
| VOLDO2 | LDO2 regulated output | Factory-set 2.5V ±3%; independent from VOLDO1; supports mixed-voltage I/O domains |
| ENLDO2 | LDO2 enable control | Independent enable allows selective activation of 2.5V rail (e.g., for peripheral subsystems) |
| GNDLDO | LDO power ground | Dedicated ground return path minimizes noise coupling between LDOs and DC-DC sections |
| ENDCD2 | DC-DC2 enable control | Enables second buck converter independently; supports asymmetric power-up sequences |
| FB2 | DC-DC2 feedback node | Internally connected to fixed 2.5V output; not externally accessible in this variant |
| VINDCD2 | DC-DC2 input supply | May share VINDCD1 or use separate source; supports differential input configurations |
| SW2 | DC-DC2 switching node | Connects to inductor; high dv/dt node requiring short, wide trace routing away from analog signals |
| GNDDCD2 | DC-DC2 power ground | Separate ground pin isolates high-frequency switching currents from LDO and analog grounds |
| GNDDCD1 | DC-DC1 power ground | Minimizes ground bounce between converters; routed separately to E-pad for thermal integrity |
| SW1 | DC-DC1 switching node | High-side switch node; requires tight loop with inductor and output capacitor to reduce EMI |
Key Features
| Feature | Design Value |
|---|---|
| Dual 1500mA synchronous buck converters | Delivers high current density in 4mm² footprint; eliminates need for external MOSFETs and drivers |
| 3MHz constant-frequency PWM + skip mode | Reduces inductor size by >50% vs. 1MHz designs while maintaining light-load efficiency >85% |
| Factory-fixed LDO outputs (3.3V/2.5V) | Eliminates external resistor dividers and associated placement/tolerance errors in space-constrained layouts |
| Independent enable pins per regulator | Enables precise power sequencing (e.g., core before I/O) without external supervisors or timers |
| Active output discharge (115Ω bleed) | Forces rapid discharge of DCD1/DCD2 outputs during disable, preventing floating voltages on powered-down rails |
| Integrated overcurrent and thermal protection | 2.5A peak current limit per buck + 155°C thermal shutdown prevents damage during short-circuit or thermal overload |
Applications
| Smartphone Application Processor Core | Mobile Baseband RF Power Management |
|---|---|
Use Scenario: Supplying ARM Cortex-A series CPU cores requiring tightly regulated 3.3V I/O and 2.5V analog subsystem rails from a single Li-ion cell. IC Role / Device Role / Timing Role: Dual-buck + dual-LDO PMIC providing independent, sequenced voltage domains with fast transient response to dynamic CPU load changes. Use Value: Enables sub-100ns voltage droop recovery during 0→1500mA load steps, preserving core stability without external compensation. |
Use Scenario: Powering LTE/WCDMA transceiver ICs with strict 2.5V LDO requirements for RF synthesizers and 3.3V for digital baseband interfaces. IC Role / Device Role / Timing Role: LDO2 supplies ultra-low-noise 2.5V (45µVRMS) to sensitive RF blocks; DCD1 powers digital baseband at 3.3V with PFM efficiency optimization. Use Value: PSRR >55dB at 1kHz ensures minimal RF carrier leakage into LDO2 output, reducing adjacent-channel interference. |
| Portable Medical Sensor Hub | Industrial Handheld Terminal |
Use Scenario: Powering multi-sensor fusion modules (ECG, SpO₂, temperature) with isolated analog and digital supplies in battery-operated diagnostic equipment. IC Role / Device Role / Timing Role: LDO1 (3.3V) powers digital MCU and communication interfaces; LDO2 (2.5V) supplies precision ADC reference and analog front-end. Use Value: Separate GNDLDO and GNDDCD grounds prevent digital switching noise from corrupting sub-mV analog measurements. |
Use Scenario: Supporting ruggedized barcode scanners and RFID readers operating across −40°C to +85°C ambient with intermittent high-current motor/LED bursts. IC Role / Device Role / Timing Role: DCD2 delivers 1500mA pulses to drive laser diodes; DCD1 powers main controller; LDOs supply real-time clock and memory backup rails. Use Value: 3MHz operation maintains regulation during 10ms motor startup surges without audible coil whine or output collapse. |
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 |
|---|---|---|---|
| TPS65023RSBR | 3.3V/2.5V fixed LDOs; 1.8V/1.2V adjustable bucks; 2.25MHz switching; 20-pin QFN | Supports lower-core-voltage SoCs; lacks active output discharge; higher pin count increases layout complexity | Choose when targeting OMAP3/DM365 platforms requiring 1.2V core rails and TI ecosystem compatibility |
| RT8059ZSP | Dual 1.5A bucks only (no integrated LDOs); 3MHz; requires external 300mA LDOs for 3.3V/2.5V rails | Higher BOM count and board area; greater design flexibility for LDO selection but increased validation effort | Choose when discrete LDO selection is needed for specialized noise or PSRR requirements beyond ISL9307IRTAANFZ-T7A's 45µVRMS spec |
Compared with TPS65023RSBR and RT8059ZSP, the ISL9307IRTAANFZ-T7A integrates complete dual-buck + dual-LDO functionality in a smaller 16-pin footprint, includes active output discharge and dedicated LDO ground pins for noise isolation, and delivers superior light-load efficiency via 3MHz skip-mode operation - making it optimal for space- and battery-life-constrained handheld designs.
Availability
ISL9307IRTAANFZ-T7A is available at Aetrix Electronics and suitable for smartphone power management, portable medical instrumentation, industrial handheld terminals, and battery-powered DSP core applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL9307IRTAANFZ-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 leader in high-performance analog semiconductors, specializing in power management and signal processing solutions for mobile, computing, and industrial markets.
The ISL9307IRTAANFZ-T7A belongs to Intersil's mini-PMIC product line, engineered specifically for compact, battery-powered systems needing multiple regulated rails with minimal external components and robust thermal performance.
FAQ
What is the output voltage configuration of the ISL9307IRTAANFZ-T7A?
The ISL9307IRTAANFZ-T7A features factory-programmed fixed outputs: LDO1 delivers 3.3V and LDO2 delivers 2.5V, both with ±3% accuracy across temperature and load. These outputs require no external feedback resistors, simplifying layout and reducing component count compared to adjustable variants like ISL9307IRTAAJFZ-T7A.
Does the ISL9307IRTAANFZ-T7A support power sequencing between its regulators?
Yes, the ISL9307IRTAANFZ-T7A provides four independent enable pins (ENDCD1, ENDCD2, ENLDO1, ENLDO2) that allow precise control of startup order. For example, ENLDO1 can be delayed using an RC network after ENDCCD1 assertion to ensure the 3.3V LDO powers up only after the 3.3V buck rail stabilizes - critical for avoiding latch-up in mixed-voltage SoCs.
What thermal management provisions does the ISL9307IRTAANFZ-T7A include?
The ISL9307IRTAANFZ-T7A incorporates thermal shutdown at 155°C with 30°C hysteresis and requires proper PCB thermal design: its exposed pad must be soldered to a solid ground plane with ≥9 thermal vias (0.3mm diameter). The 40.2°C/W θJA rating assumes a high-thermal-conductivity test board - actual performance depends on copper area and via count.
Can the ISL9307IRTAANFZ-T7A operate from a single Li-ion cell without external pre-regulation?
Yes, the ISL9307IRTAANFZ-T7A accepts 2.5V–5.5V on VINDCD1/VINDCD2 and 1.5V–5.5V on VINLDO, fully covering the 2.8V–4.2V discharge curve of a single Li-ion cell. Its 3MHz operation maintains regulation down to 2.5V input, and low-dropout mode extends usable battery life by sustaining output until cell voltage falls below 2.3V.
How does the ISL9307IRTAANFZ-T7A handle output short-circuit conditions on its buck converters?
Under short-circuit, the ISL9307IRTAANFZ-T7A detects low FB voltage and reduces PWM oscillator frequency to limit power dissipation while maintaining peak current limiting (2.5A typical). This "foldback" behavior prevents thermal runaway and allows safe recovery once the fault clears - unlike latch-off protection which would require a full reset cycle.
ISL9307IRTAANFZ-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)
ISL9307IRTAANFZ-T7A FAQ
1.How can I place an order for ISL9307IRTAANFZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9307IRTAANFZ-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 ISL9307IRTAANFZ-T7A reliable?
The price and inventory of ISL9307IRTAANFZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9307IRTAANFZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9307IRTAANFZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9307IRTAANFZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9307IRTAANFZ-T7A?
ISL9307IRTAANFZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9307IRTAANFZ-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 ISL9307IRTAANFZ-T7A?
For technical support, including ISL9307IRTAANFZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9307IRTAANFZ-T7A requirements.
6.How does Aetrix verify that ISL9307IRTAANFZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9307IRTAANFZ-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 ISL9307IRTAANFZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9307IRTAANFZ-T7A?
All ISL9307IRTAANFZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9307IRTAANFZ-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 ISL9307IRTAANFZ-T7A part is unused and in its original packaging.
Return procedure for ISL9307IRTAANFZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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