My Inquiry
My Account
Renesas ISL9307IRTAAJBZ-T7A
- Part No.:
- ISL9307IRTAAJBZ-T7A
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
ISL9307IRTAAJBZ-T7A.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:381
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL9307IRTAAJBZ-T7A from Renesas (formerly Intersil) is a dual-buck + dual-LDO mini-PMIC for battery-powered microprocessor power rails, integrating two 3MHz, 1500mA synchronous step-down converters (DCD1/DCD2) and two 300mA low-input LDOs (LDO1/LDO2). It supports 2.5–5.5V input for buck stages and 1.5–5.5V for LDOs, with factory-fixed LDO outputs of 2.8V and 1.5V, operating across –40°C to +85°C in a 4mm×4mm TQFN-16 package.
For engineers reviewing the ISL9307IRTAAJBZ-T7A datasheet, ISL9307IRTAAJBZ-T7A pinout, ISL9307IRTAAJBZ-T7A application, or ISL9307IRTAAJBZ-T7A equivalent, key selection criteria include its dual-buck switching frequency (3MHz), LDO output voltage pairing (2.8V/1.5V), skip-mode efficiency at light load, EN-controlled power sequencing, and thermal shutdown at 155°C.
Technical Context
The ISL9307IRTAAJBZ-T7A 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. Its 3MHz switching frequency enables use of compact 1.5µH inductors and low-ESR ceramic capacitors.
Each buck converter features active output discharge via a 115Ω internal bleeding resistor, low-dropout operation with P-channel MOSFET ON-resistance as low as 0.14Ω (at VIN = 3.6V), and undervoltage lockout (2.2V typical on VINDCD1, 1.4V on VINLDO). The LDOs deliver 300mA with dropout as low as 80mV at VO > 2.8V and PSRR of 55dB at 1kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 3.0 MHz ±0.4 MHz - enables use of 1.5µH inductors and reduces board area vs. lower-frequency PMICs |
| Buck Output Current | 1500 mA per channel - supports core logic or memory rail loads without external boost |
| LDO Output Current | 300 mA per channel - sufficient for I/O, analog, or peripheral power with low noise (45 µVRMS) |
| LDO Output Voltages | 2.8 V (LDO1), 1.5 V (LDO2) - factory-fixed, eliminating external feedback resistors for these rails |
| Quiescent Current | 50 µA typ. (both bucks enabled, no load) - extends battery life in standby mode |
| Thermal Shutdown | 155°C threshold with 30°C hysteresis - protects die during sustained overload or poor PCB thermal design |
| Operating Temperature | –40°C to +85°C - qualified for consumer handheld and industrial portable equipment |
Pinout & Package
The ISL9307IRTAAJBZ-T7A is housed in a 4mm × 4mm, 16-lead TQFN package with exposed thermal pad (JEDEC MO220K, pkg drawing L16.4X4G). Pin 1 is marked by a mold or laser index feature in the top-left corner; the E-pad 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 circuit supply | Accepts 2.5–5.5V; powers all digital/analog blocks; UVLO triggers at 2.2V |
| FB1 | Feedback node for DCD1 output regulation | 0.8V reference; connects to resistor divider for adjustable versions; tied directly to VODCD1 for fixed-output variants like this one |
| ENDCD1 | Enable control for DCD1 | Active-high logic (1.4V min high); allows precise power-up sequencing with delay |
| ENLDO1 | Enable control for LDO1 | Active-high logic (1.4V min high); independent control enables staggered rail activation |
| VINLDO | Shared input for LDO1 and LDO2 | 1.5–5.5V range; may be supplied from battery or from DCD1/DCD2 output |
| VOLDO1 | Fixed 2.8V output of LDO1 | No external components required; delivers up to 300mA with <250mV dropout at full load |
| VOLDO2 | Fixed 1.5V output of LDO2 | Factory-set; optimized for low-voltage I/O or sensor biasing with 45 µVRMS noise |
| ENLDO2 | Enable control for LDO2 | Independent enable allows dynamic power gating of secondary low-voltage rail |
| GNDLDO | Power ground for both LDOs | Must be connected to clean ground plane; separate from buck grounds to minimize noise coupling |
| ENDCD2 | Enable control for DCD2 | Enables independent startup timing for second buck rail (e.g., memory or GPU core) |
| FB2 | Feedback node for DCD2 | 0.8V reference; tied to VODCD2 output per fixed-output configuration |
| VINDCD2 | Main input for buck converter DCD2 | 2.3–VINDCD1 range; supports asymmetric input sourcing (e.g., separate battery tap) |
| SW2 | Switching node for DCD2 | Connects to inductor; high di/dt node requiring short, wide trace and separation from sensitive signals |
| GNDDCD2 | Power ground for DCD2 | Must be routed separately from GNDLDO and GNDDCD1 to avoid ground bounce |
| GNDDCD1 | Power ground for DCD1 | Low-impedance return path for high-frequency buck current; ties to E-pad |
| SW1 | Switching node for DCD1 | High-noise node; requires tight loop with L1 and COUT to minimize EMI |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3MHz synchronous buck converters | Enables ultra-compact DC/DC design with 1.5µH inductors and eliminates need for external compensation |
| Factory-fixed LDO outputs (2.8V/1.5V) | Removes external feedback resistors, saves board space, and guarantees output accuracy without layout sensitivity |
| Per-channel enable pins (ENDCD1/ENDCD2/ENLDO1/ENLDO2) | Supports programmable power sequencing for multi-rail SoCs without external supervisors |
| Skip-mode operation under light load | Reduces quiescent current to 50µA typ. with both bucks enabled, extending Li-ion battery runtime in standby |
| Internal 115Ω output bleed resistor | Actively discharges DCD1/DCD2 outputs when disabled, preventing floating voltages and ensuring safe state transitions |
| Thermally enhanced 4mm×4mm TQFN | θJA = 40.2°C/W enables >1.5W dissipation with standard 2-layer PCB and 9-via thermal pad |
Applications
| Smartphone Application Processor Core Power | Portable Media Player Audio Codec Bias |
|---|---|
Use Scenario: Powers CPU/GPU cores requiring tightly regulated 1.2V–1.8V rails from single Li-ion battery (3.0–4.2V). IC Role / Device Role / Timing Role: Dual buck converters (DCD1/DCD2) supply core and cache rails; LDOs provide clean 2.8V I/O and 1.5V analog reference. Use Value: 3MHz switching minimizes inductor size; skip-mode extends standby time; fixed LDOs reduce BOM count by 4 resistors. | Use Scenario: Supplies low-noise bias to stereo DAC/ADC and headphone amplifier in battery-powered media players. IC Role / Device Role / Timing Role: LDO1 (2.8V) powers analog front-end; LDO2 (1.5V) supplies reference voltage; bucks handle digital subsystems. Use Value: 45 µVRMS output noise and 55dB PSRR at 1kHz ensure high-fidelity audio without external filtering. |
| Handheld Medical Instrument Sensor Interface | Industrial IoT Edge Node Microcontroller Rail |
Use Scenario: Powers precision analog sensors (e.g., ECG, temperature) and signal chain in portable diagnostic devices. IC Role / Device Role / Timing Role: LDO2 (1.5V) supplies ultra-low-noise reference to ADC; DCD1 powers MCU core; DCD2 powers wireless transceiver. Use Value: Factory-trimmed LDO output ensures stable reference without calibration; thermal shutdown protects against enclosure overheating. | Use Scenario: Provides multiple isolated rails (core, RF, sensor) for ARM Cortex-M-based edge nodes powered by Li-po battery. IC Role / Device Role / Timing Role: DCD1 (1.2V) powers MCU; DCD2 (3.3V) powers LoRa module; LDO1 (2.8V) powers external flash; LDO2 (1.5V) powers RTC. Use Value: Independent enables allow deep-sleep mode where only LDO2 remains active, reducing system IQ to <1µA total. |
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 |
|---|---|---|---|
| TPS65023BRSBT | 3MHz dual buck (1.5A/1.5A), dual LDO (300mA/300mA); fixed LDO outputs configurable via strap pins (not factory-set); requires external resistors for adjustable buck outputs | Supports flexible LDO voltage selection but adds BOM complexity; lacks integrated bleed resistors for output discharge | Choose when LDO voltage flexibility outweighs BOM simplification and active discharge is handled externally |
| RT8059ZSP | 2.5MHz dual buck (1.5A/1.5A), dual LDO (300mA/300mA); LDO outputs fixed at 2.8V/1.8V; no skip mode; higher IQ (80µA both bucks enabled) | Offers same footprint and buck capability but targets cost-sensitive designs where light-load efficiency is secondary | Choose for price-sensitive consumer applications where 1.5V LDO is not required and 3MHz switching is unnecessary |
Compared with TPS65023BRSBT and RT8059ZSP, the ISL9307IRTAAJBZ-T7A uniquely combines factory-fixed 2.8V/1.5V LDOs, 3MHz switching, skip-mode IQ optimization, and integrated output bleed-making it optimal for space-constrained, battery-life-critical handhelds requiring minimal external components.
Availability
ISL9307IRTAAJBZ-T7A is available at Aetrix Electronics and suitable for smartphone power management, portable medical instrumentation, industrial IoT edge nodes, and handheld test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISL9307IRTAAJBZ-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 (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 ISL9307IRTAAJBZ-T7A belongs to Renesas' mini-PMIC product line, engineered specifically for space- and efficiency-constrained battery-powered handheld devices requiring tightly sequenced, low-noise multi-rail power delivery from single-cell Li-ion sources.
FAQ
What are the fixed output voltages of the LDOs in the ISL9307IRTAAJBZ-T7A?
The ISL9307IRTAAJBZ-T7A has factory-programmed LDO outputs: LDO1 delivers a fixed 2.8V, and LDO2 delivers a fixed 1.5V. These values are confirmed in the Ordering Information table (page 4 of FN7931 Rev 3.00) and require no external feedback components. This configuration eliminates resistor networks and improves output accuracy versus adjustable alternatives.
Does the ISL9307IRTAAJBZ-T7A support power sequencing between its four regulators?
Yes, the ISL9307IRTAAJBZ-T7A provides independent enable pins for each regulator: ENDCD1, ENDCD2, ENLDO1, and ENLDO2. Each is active-high with defined logic thresholds (1.4V min high), allowing external controllers or simple RC delays to implement precise startup/shutdown sequencing-critical for avoiding latch-up in multi-rail SoCs.
What is the maximum supported input voltage for the buck converters in the ISL9307IRTAAJBZ-T7A?
The ISL9307IRTAAJBZ-T7A specifies a maximum input voltage of 5.5V for both DCD1 and DCD2, with minimums of 2.5V and 2.3V respectively. Absolute maximum ratings confirm SW1/SW2 pins tolerate up to 6.5V, but recommended operation stays within 2.5–5.5V to ensure reliability and meet UVLO behavior (2.2V typical turn-on threshold).
How does the ISL9307IRTAAJBZ-T7A manage efficiency at light load?
The ISL9307IRTAAJBZ-T7A enters pulse-skipping mode under light load, reducing switching frequency to minimize gate and switching losses. With both buck converters enabled and no load, quiescent current is 50µA typical. This mode is automatic and requires no external control, directly extending battery life in standby or idle states.
Is thermal management support provided for the ISL9307IRTAAJBZ-T7A in the datasheet?
Yes, the ISL9307IRTAAJBZ-T7A datasheet (FN7931 Rev 3.00) includes comprehensive thermal guidance: θJA = 40.2°C/W for the 4mm×4mm TQFN package, thermal shutdown at 155°C with 30°C hysteresis, and detailed board layout recommendations-including mandatory 9-via connection of the exposed E-pad to a solid ground plane for effective heat dissipation.
ISL9307IRTAAJBZ-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:
- 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)
ISL9307IRTAAJBZ-T7A FAQ
1.How can I place an order for ISL9307IRTAAJBZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9307IRTAAJBZ-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 ISL9307IRTAAJBZ-T7A reliable?
The price and inventory of ISL9307IRTAAJBZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9307IRTAAJBZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9307IRTAAJBZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9307IRTAAJBZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9307IRTAAJBZ-T7A?
ISL9307IRTAAJBZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9307IRTAAJBZ-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 ISL9307IRTAAJBZ-T7A?
For technical support, including ISL9307IRTAAJBZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9307IRTAAJBZ-T7A requirements.
6.How does Aetrix verify that ISL9307IRTAAJBZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9307IRTAAJBZ-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 ISL9307IRTAAJBZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9307IRTAAJBZ-T7A?
All ISL9307IRTAAJBZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9307IRTAAJBZ-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 ISL9307IRTAAJBZ-T7A part is unused and in its original packaging.
Return procedure for ISL9307IRTAAJBZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL9307IRTAAJBZ-T7A Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
