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Renesas ISL9307IRTWCWNZ-T7A
- Part No.:
- ISL9307IRTWCWNZ-T7A
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
ISL9307IRTWCWNZ-T7A.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,302
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Product details
Overview
ISL9307IRTWCWNZ-T7A from Renesas (formerly Intersil) is a dual-buck + dual-LDO mini-PMIC for single-cell 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 output voltages are 1.2V (DCD1), 1.8V (DCD2), 1.2V (LDO1), and 3.3V (LDO2), enabling power sequencing in mobile processors and DSP core supplies.
For engineers reviewing the ISL9307IRTWCWNZ-T7A datasheet, ISL9307IRTWCWNZ-T7A pinout, ISL9307IRTWCWNZ-T7A application, or ISL9307IRTWCWNZ-T7A equivalent, key selection criteria include its 4mm×4mm TQFN-16 package, 2.5–5.5V DCD input range, 1.5–5.5V LDO input range, skip-mode efficiency optimization, and independent enable pins for precise power sequencing in space-constrained portable electronics.
Technical Context
The ISL9307IRTWCWNZ-T7A implements peak-current-mode PWM control for both buck converters, supporting fast transient response and pulse-by-pulse current limiting up to 1500mA per channel. It enters skip mode under light load to reduce switching loss, with zero-cross detection over 16 consecutive cycles triggering entry and exit based on ±1.5% output voltage deviation.
Each LDO features 125–250mV dropout at 300mA (dependent on output voltage), 55dB PSRR at 1kHz, and 45µVRMS output noise (10Hz–100kHz). UVLO thresholds are 2.2V (rising) for DCD inputs and 1.41V (rising) for VINLDO, with hysteresis ensuring stable startup and shutdown behavior across –40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DCD Output Current | 1500mA per channel - supports high-current digital core rails without external boost stages |
| LDO Output Current | 300mA per channel - sufficient for I/O, memory, or peripheral biasing with low-noise regulation |
| Switching Frequency | 3.0MHz (2.6–3.4MHz range) - enables use of compact 1.5µH inductors and low-ESR ceramic capacitors |
| Quiescent Current | 50µA typical with both DCDs enabled in skip mode - extends battery runtime in standby states |
| Output Voltage Accuracy | ±3% over temperature - ensures reliable logic-level compliance for 1.2V/1.8V/3.3V rails |
| Thermal Shutdown | 155°C threshold with 30°C hysteresis - protects die integrity during sustained overload or poor PCB thermal design |
| Package | 4mm×4mm TQFN-16 with exposed thermal pad - provides low θJA (40.2°C/W) for efficient heat dissipation in thin-profile devices |
Pinout & Package
ISL9307IRTWCWNZ-T7A uses a 4mm×4mm, 16-lead Thin Quad Flat No-Lead (TQFN) package with an exposed thermal pad soldered to PCB ground for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINDCD1 (Pin 1) | DC-DC1 input supply and internal circuit power rail | Accepts 2.5–5.5V; powers all internal analog/digital blocks - must be decoupled with 10µF ceramic capacitor |
| FB1 (Pin 2) | DC-DC1 feedback node | Connects to resistor divider for adjustable outputs; tied directly to VODCD1 for fixed 1.2V version like ISL9307IRTWCWNZ-T7A |
| ENDCD1 (Pin 3) | DC-DC1 enable control | Active-high logic (1.4V threshold); allows precise power-up sequencing relative to other rails |
| ENLDO1 (Pin 4) | LDO1 enable control | Active-high logic (1.4V threshold); independent of DCD enables for flexible rail ordering |
| VINLDO (Pin 5) | LDO1/LDO2 input supply | Accepts 1.5–5.5V; may be powered from battery or DCD output - sets maximum LDO dropout headroom |
| VOLDO1 (Pin 6) | LDO1 regulated output | Fixed 1.2V output (per ordering code WCWNZ); delivers up to 300mA with <250mV dropout at full load |
| VOLDO2 (Pin 7) | LDO2 regulated output | Fixed 3.3V output (per ordering code WCWNZ); suitable for interface or analog subsystems requiring clean, low-noise supply |
| ENLDO2 (Pin 8) | LDO2 enable control | Active-high logic (1.4V threshold); enables independent control of second LDO rail |
| GNDLDO (Pin 9) | LDO power ground | Dedicated ground return for LDO1/LDO2 - must be connected to low-impedance system ground plane |
| ENDCD2 (Pin 10) | DC-DC2 enable control | Active-high logic (1.4V threshold); used with ENDCD1 to stagger startup timing between dual cores |
| FB2 (Pin 11) | DC-DC2 feedback node | Connects to resistor divider for adjustable outputs; tied directly to VODCD2 for fixed 1.8V version |
| VINDCD2 (Pin 12) | DC-DC2 input supply | Accepts 2.3–VINDCD1; supports asymmetric input configurations when DCD1 and DCD2 draw from different sources |
| SW2 (Pin 13) | DC-DC2 switching node | High-frequency, high-di/dt node - requires short, wide trace to inductor and low-inductance ground return |
| GNDDCD2 (Pin 14) | DC-DC2 power ground | Dedicated ground return for DCD2 power stage - must be isolated from signal grounds and tied near SW2 |
| GNDDCD1 (Pin 15) | DC-DC1 power ground | Dedicated ground return for DCD1 power stage - forms critical part of high-current loop with SW1 and VINDCD1 |
| SW1 (Pin 16) | DC-DC1 switching node | High-frequency, high-di/dt node - routed with minimal length and adjacent to GNDDCD1 to reduce EMI |
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 - reduces board area by >40% vs. lower-frequency alternatives |
| Independent enable pins per regulator | Supports programmable power sequencing (e.g., LDO1 before DCD1) without external timers or supervisors - simplifies firmware and reduces BOM count |
| Active output discharge (115Ω bleed resistor) | Forces rapid discharge of DCD1/DCD2 outputs upon disable - prevents floating rails and ensures safe state transitions in multi-rail systems |
| Low-noise LDOs with 45µVRMS noise | Meets stringent analog/RF supply requirements (e.g., ADC references, PLL VCOs) without additional filtering components |
| Thermal shutdown with 30°C hysteresis | Prevents thermal runaway during sustained overload while avoiding oscillatory shutdown/restart - improves system reliability in sealed enclosures |
Applications
| Smartphone Application Processor Core | Portable Medical Sensor Hub |
|---|---|
Use Scenario: Powers ARM Cortex-A series CPU cores requiring tightly regulated 1.2V and 1.8V rails from a single Li-ion cell. IC Role / Device Role / Timing Role: Dual-buck converter delivers high-efficiency dynamic voltage scaling; LDOs supply noise-sensitive analog peripherals. Use Value: 3MHz operation minimizes passive size; ±3% output accuracy ensures SoC functional integrity across battery discharge curve. | Use Scenario: Supplies mixed-signal ASIC, precision ADC, and Bluetooth LE radio in handheld diagnostic device. IC Role / Device Role / Timing Role: DCD1 powers digital core; DCD2 powers sensor interface; LDO1 (1.2V) powers ADC reference; LDO2 (3.3V) powers RF front-end. Use Value: 45µVRMS LDO noise preserves 16-bit ADC SNR; independent enables allow staggered wake-up to manage inrush current. |
| Wearable Fitness Tracker SoC | Industrial Handheld Terminal |
Use Scenario: Powers ultra-low-power microcontroller, motion sensor, and OLED display driver from 3.7V Li-polymer battery. IC Role / Device Role / Timing Role: DCD2 (1.8V) powers MCU; LDO1 (1.2V) powers sensor interface; LDO2 (3.3V) powers display driver; DCD1 (1.2V) reserved for future expansion. Use Value: 50µA quiescent current in skip mode extends battery life beyond 7 days; 4mm×4mm footprint fits constrained wearable form factor. | Use Scenario: Powers ruggedized ARM-based terminal with barcode scanner, Wi-Fi module, and touchscreen controller. IC Role / Device Role / Timing Role: DCD1 (1.2V) powers application processor; DCD2 (1.8V) powers DDR memory; LDO1 (1.2V) powers FPGA I/O; LDO2 (3.3V) powers USB PHY. Use Value: Independent EN pins coordinate boot sequence to meet JEDEC power-up timing; thermal shutdown protects against enclosure overheating in hot environments. |
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 | Triple 1.5A buck + triple LDO; 2.5–6V input; no skip mode; larger 5mm×5mm QFN-40 package | Higher integration but less suited for space-constrained designs; lacks 3MHz switching for smallest passives | Choose when needing third buck rail or higher LDO count; avoid if board area or light-load efficiency are critical |
| RTQ2132B-QA | Dual 2A buck + dual 300mA LDO; 2.7–5.5V input; 2.2MHz switching; integrated soft-start; smaller 3.5mm×3.5mm QFN-20 | Higher current capability and slightly smaller footprint; different fixed-voltage options require checking compatibility with 1.2V/1.8V/1.2V/3.3V set | Choose for higher load margin or tighter board area; verify LDO1/LDO2 fixed outputs match required 1.2V/3.3V |
Compared with TPS65023BRSBR and RTQ2132B-QA, the ISL9307IRTWCWNZ-T7A offers superior light-load efficiency via 3MHz skip mode and the smallest footprint among dual-buck+dual-LDO PMICs, making it optimal for ultra-thin smartphones and wearables where passive size and standby current dominate design constraints.
Availability
ISL9307IRTWCWNZ-T7A is available at Aetrix Electronics and suitable for smartphone application processor core supplies, portable medical sensor hubs, wearable fitness tracker SoCs, and industrial handheld terminals requiring stable component supply across production lifecycles.
Supply support for ISL9307IRTWCWNZ-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 (acquired Intersil in 2017) is a global leader in microcontrollers, analog, and power management ICs, serving automotive, industrial, and consumer markets with high-reliability semiconductor solutions.
The ISL9307IRTWCWNZ-T7A belongs to Renesas' mini-PMIC product line, designed specifically for space- and efficiency-critical battery-powered portable electronics requiring tightly sequenced, low-noise multiple voltage rails from a single Li-ion cell.
FAQ
What are the fixed output voltages configured for ISL9307IRTWCWNZ-T7A?
The ISL9307IRTWCWNZ-T7A has factory-programmed fixed outputs: DCD1 = 1.2V, DCD2 = 1.8V, LDO1 = 1.2V, and LDO2 = 3.3V. These values are encoded in the part's ordering code "WCWNZ" and cannot be adjusted externally - FB1 and FB2 pins are internally connected to their respective outputs per the datasheet.
Does ISL9307IRTWCWNZ-T7A support power sequencing, and how is it implemented?
Yes, ISL9307IRTWCWNZ-T7A supports precise power sequencing via four independent enable pins: ENDCD1, ENDCD2, ENLDO1, and ENLDO2. Each is active-high with 1.4V logic threshold, allowing external controllers or simple RC delays to stagger startup timing - for example, enabling LDO1 before DCD1 ensures clean bias for feedback circuitry.
What is the purpose of the bleeding resistor in ISL9307IRTWCWNZ-T7A, and what is its value?
The ISL9307IRTWCWNZ-T7A integrates an internal 115Ω bleeding resistor across each buck converter output (DCD1/DCD2) to actively discharge stored energy when the channel is disabled. This prevents floating outputs and ensures rapid, controlled rail collapse - critical for safe multi-rail power-down sequences in SoC-based systems.
Can ISL9307IRTWCWNZ-T7A operate with a 2.3V input on VINDCD2?
Yes, ISL9307IRTWCWNZ-T7A supports VINDCD2 down to 2.3V (per Recommended Operating Conditions), provided it does not exceed VINDCD1. This allows asymmetric input configurations - for instance, powering DCD2 from a partially discharged cell segment while DCD1 draws from a higher-voltage source, extending usable battery range.
How does the skip mode in ISL9307IRTWCWNZ-T7A improve battery life?
The ISL9307IRTWCWNZ-T7A enters skip mode under light load by reducing switching frequency only when inductor current crosses zero for 16 consecutive cycles. This eliminates unnecessary switching losses, lowering quiescent current to 50µA typical with both bucks enabled - directly extending standby time in always-on portable devices like wearables and IoT sensors.
ISL9307IRTWCWNZ-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:
- 1.2V, 1.5A
- Voltage/Current - Output 2:
- 1.8V, 1.5A
- Voltage/Current - Output 3:
- 1.2V, 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)
ISL9307IRTWCWNZ-T7A FAQ
1.How can I place an order for ISL9307IRTWCWNZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9307IRTWCWNZ-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 ISL9307IRTWCWNZ-T7A reliable?
The price and inventory of ISL9307IRTWCWNZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9307IRTWCWNZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9307IRTWCWNZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9307IRTWCWNZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9307IRTWCWNZ-T7A?
ISL9307IRTWCWNZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9307IRTWCWNZ-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 ISL9307IRTWCWNZ-T7A?
For technical support, including ISL9307IRTWCWNZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9307IRTWCWNZ-T7A requirements.
6.How does Aetrix verify that ISL9307IRTWCWNZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9307IRTWCWNZ-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 ISL9307IRTWCWNZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9307IRTWCWNZ-T7A?
All ISL9307IRTWCWNZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9307IRTWCWNZ-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 ISL9307IRTWCWNZ-T7A part is unused and in its original packaging.
Return procedure for ISL9307IRTWCWNZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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