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Renesas ISL95338IRTZ-T
- Part No.:
- ISL95338IRTZ-T
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
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ISL95338IRTZ-T.pdf
- Description:
- IC REG NOTEBOOK BI-DIR VR 4X4 T
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Product details
Overview
ISL95338IRTZ-T from Renesas is a bidirectional buck-boost voltage regulator IC designed for USB-C power delivery in portable systems. It supports 3.8V–24V input, regulates up to 20V output in both forward (ADP→SYS) and reverse (SYS→ADP) directions, delivers up to 1MHz switching, and integrates SMBus/I²C programmable current/voltage limits, OCP/OVP/UVP/OTP protection, and R3™ modulator architecture for seamless DCM/CCM transitions. It is used in ultrabooks and power banks requiring dynamic power path management.
For engineers reviewing the ISL95338IRTZ-T datasheet, ISL95338IRTZ-T pinout, ISL95338IRTZ-T application, or ISL95338IRTZ-T equivalent, key selection criteria include bidirectional regulation capability, -40°C to +100°C operating range, 32-pin 4×4 TQFN package, SMBus-configurable PROCHOT# thresholds, and dual-mode soft-start timing control via REF pin.
Technical Context
The ISL95338IRTZ-T implements a dual-phase synchronous buck-boost topology with independent forward and reverse modulators, each featuring R3™ adaptive on-time control for high light-load efficiency and fast transient response. Its gate drivers support 1.3A–2.8A sink/source with programmable dead time (10–40ns) and integrated boot diodes for high-side MOSFET drive.
It uses two independent current-sense amplifiers (CSIP/CSIN for ADP side, CSOP/CSON for SYS side), dual error amplifiers (COMPF/COMPR), and SMBus registers to configure forward/reverse output voltages (VOUTS/ADPS), input/output current limits, PROCHOT# thresholds, and soft-start timing-enabling full system-level power policy control without external microcontroller intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Bidirectional synchronous buck-boost with dual independent modulators for forward and reverse power flow. |
| Input Voltage Range | 3.8V to 24V (no dead zone); supports USB PD, travel adapters, and conventional AC/DC supplies. |
| Output Voltage Range | Up to 20V in both directions; programmable via resistor dividers on VOUTS (forward) and ADPS (reverse). |
| Switching Frequency | Up to 1MHz; enables compact magnetics and high-density power designs. |
| Operating Temperature | -40°C to +100°C; qualified for industrial and extended-temperature portable applications. |
| Protection Features | OCP, OVP, UVP, OTP - with separate thresholds and hysteresis for forward and reverse modes. |
| Interface | SMBus/I²C-compatible serial interface with auto-increment addressing and register-based configuration of all critical parameters. |
Pinout & Package
ISL95338IRTZ-T is housed in a 32-lead, 4mm × 4mm, 0.5mm pitch TQFN package (RoHS-compliant, moisture sensitivity level MSL3). The exposed thermal pad (bottom) must be soldered to PCB ground for thermal performance and electrical reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Bottom Pad) | Signal and thermal reference | Primary ground return for analog/digital circuits and heat dissipation path; must be connected to large copper pour. |
| CSOP / CSON | Forward output current sense inputs | Differential pair measuring VOUT current via external shunt; requires 0.1µF ceramic filter capacitor between pins. |
| VOUTS | Forward output voltage feedback | Resistor divider node setting regulated VSYS voltage; connects to internal error amplifier COMPF. |
| BOOT1 / BOOT2 | High-side gate driver bootstrap supplies | Each powers respective UGATE1/UGATE2 drivers; requires MLCC capacitor to PHASE1/PHASE2. |
| UGATE1 / LGATE1 / PHASE1 | Phase 1 gate drive and switching node | Controls Q1/Q2 half-bridge for ADP-side buck-boost; PHASE1 connects to Q1 source/Q2 drain/inductor. |
| UGATE2 / LGATE2 / PHASE2 | Phase 2 gate drive and switching node | Controls Q4/Q3 half-bridge for SYS-side buck-boost; PHASE2 connects to Q4 source/Q3 drain/inductor. |
| ADPS | Reverse output voltage feedback | Resistor divider node setting regulated ADP voltage in reverse mode; connects to internal error amplifier COMPR. |
| CSIP / CSIN | Reverse input current sense inputs | Differential pair measuring ADP current via external shunt; also senses ADP voltage in forward mode. |
| FRWEN / RVSEN | Direction enable inputs | Analog FRWEN >0.8V enables forward mode; digital RVSEN high enables reverse mode - both independently controllable. |
| SCL / SDA | SMBus interface | Open-drain I²C-compatible bus; requires 10kΩ pull-ups; supports register read/write for full configuration. |
| PROCHOT# / FRWPG / RVSPG | Status and alert outputs | Open-drain indicators: PROCHOT# asserts on overcurrent; FRWPG/RVSPG signal active modulator status. |
| REF | Soft-start timing reference | Capacitor to GND sets soft-start ramp time; same pin controls timing in both forward and reverse directions. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional regulation | Enables single-chip USB-C DRP (dual-role port) implementation: powers system from adapter (forward) or charges adapter from battery (reverse). |
| R3™ modulator architecture | Delivers >90% efficiency at light load and <10µs transient response without external compensation components. |
| Programmable PROCHOT# thresholds | Configurable per-direction overcurrent alerts (e.g., 2688mA ADP-side, 4096mA SYS-side) via SMBus registers for thermal-aware system throttling. |
| Bypass mode in both directions | Disables switching regulators and enables direct conduction path for ultra-low-loss power transfer when input/output voltages align. |
| Internal bidirectional discharge | Actively discharges ADP and VOUT nodes (6.5mA/8.5mA typical) during disable to meet USB-C quick-disconnect safety requirements. |
| LDO outputs (VDD/VDDP) | VDD provides 4.5–5.5V bias for internal circuitry; VDDP powers gate drivers - both support external decoupling and derated capacitance requirements. |
Applications
| USB-C Power Delivery (PD) Source/Sink | Ultrabook Dynamic Power Path Management |
|---|---|
Use Scenario: Laptop negotiates 20V/5A power from USB-C charger while simultaneously powering peripherals and charging internal battery. IC Role / Device Role / Timing Role: ISL95338IRTZ-T acts as bidirectional power controller managing energy flow between adapter, system rail, and battery; handles seamless buck/boost/buck-boost transitions during voltage changes. Use Value: Eliminates need for separate buck and boost controllers, reducing BOM count and PCB area by ~40% versus discrete solutions. |
Use Scenario: Ultrabook switches between AC adapter and battery power without system interruption or brownout during plug/unplug events. IC Role / Device Role / Timing Role: ISL95338IRTZ-T monitors ADP and VOUT voltages, enables reverse mode to backfeed adapter during brownout, and maintains stable 12V system rail using R3™ fast transient response. Use Value: Achieves <100µs output voltage recovery during adapter removal, preventing OS crashes or data loss. |
| Power Bank Bidirectional Charging | Tablet Fast Swap Mode |
Use Scenario: Portable power bank accepts 20V input from wall adapter and delivers 5V/9V/15V/20V to devices via USB-C, while also supporting reverse charging from device to bank. IC Role / Device Role / Timing Role: ISL95338IRTZ-T serves as core power conversion engine, dynamically selecting forward/reverse mode based on voltage hierarchy and SMBus commands. Use Value: Enables single-port bidirectional operation with programmable current limits (e.g., 3A charge, 5A discharge) and automatic direction arbitration. |
Use Scenario: Tablet supports simultaneous charging and peripheral power delivery via single USB-C port - e.g., charging from dock while powering external SSD. IC Role / Device Role / Timing Role: ISL95338IRTZ-T executes Fast Swap mode: detects accessory connection, disables forward mode, enables reverse mode, and reconfigures output voltage within 5ms. Use Value: Reduces accessory negotiation latency by 70% compared to firmware-controlled alternatives, enabling plug-and-play peripheral support. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional buck-boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8857GQ-Z | Single-direction (forward-only) buck-boost; no reverse mode or SMBus interface; 2.5V–24V input, 0.8V–24V output; 2A max continuous. | Limited to adapter-to-system power only; cannot support USB-C DRP or battery-to-adapter charging. | Select MP8857GQ-Z only if reverse functionality is unnecessary and cost is prioritized over feature set. |
| TPS65988DHAR | USB-C PD controller with integrated Type-C port logic, but no power stage; requires external buck-boost ICs for voltage regulation. | Requires companion power IC(s); adds complexity, layout area, and component count versus ISL95338IRTZ-T's monolithic integration. | Choose TPS65988DHAR when full USB-C protocol stack (SOP', VCONN, BMC) is required alongside custom power stage design. |
Compared with MP8857GQ-Z and TPS65988DHAR, the ISL95338IRTZ-T uniquely combines bidirectional regulation, SMBus programmability, and integrated gate drivers in one 4×4 mm package - eliminating external controllers, reducing total solution size by ≥35%, and enabling firmware-light USB-C DRP implementations.
Availability
ISL95338IRTZ-T is available at Aetrix Electronics and suitable for ultrabooks, USB-C power banks, tablets, and mobile devices requiring stable component supply across industrial temperature ranges and long product lifecycles.
Supply support for ISL95338IRTZ-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 is a global semiconductor leader delivering trusted embedded design innovation, with expertise in analog, power, and mixed-signal solutions for automotive, industrial, and consumer markets.
The ISL95338IRTZ-T belongs to Renesas' USB-C and portable power management product line, engineered specifically for space-constrained, thermally demanding USB-C DRP applications requiring high-efficiency bidirectional power conversion and intelligent system-level control.
FAQ
What is the operating temperature range of the ISL95338IRTZ-T?
The ISL95338IRTZ-T is rated for an ambient operating temperature range of -40°C to +100°C, making it suitable for industrial-grade portable electronics including ultrabooks and ruggedized power banks where thermal margins are constrained. This extended range is confirmed in the Ordering Information table (Page 6) and Recommended Operation Conditions (Page 10) of the FN8896 datasheet.
Does the ISL95338IRTZ-T support both forward and reverse power flow?
Yes, the ISL95338IRTZ-T natively supports bidirectional power flow: forward mode (ADP → SYS) for charging the system from an adapter, and reverse mode (SYS → ADP) for back-powering the adapter from the system battery. Direction is controlled independently via FRWEN (analog) and RVSEN (digital) pins, and both modes support full voltage/current regulation and protection.
How is output voltage configured in forward and reverse modes for the ISL95338IRTZ-T?
In forward mode, the regulated system voltage (VSYS) is set via a resistor divider connected to the VOUTS pin; in reverse mode, the adapter-side output voltage (VADP) is set via a divider on the ADPS pin. Both feedback nodes connect to dedicated internal error amplifiers (COMPF and COMPR), and the ISL95338IRTZ-T allows SMBus programming of target voltages, enabling dynamic reconfiguration without hardware changes.
What protections does the ISL95338IRTZ-T provide, and are they active in both directions?
The ISL95338IRTZ-T provides OCP, OVP, UVP, and OTP protection in both forward and reverse modes, with separate, independently configurable thresholds and hysteresis for each direction. For example, ADP-side OVP triggers at 26.4V (forward), while ADPS-side OVP triggers at 1.2V × REF (reverse). All protections are hardware-based and active without SMBus communication.
Can the ISL95338IRTZ-T operate without SMBus communication?
Yes, the ISL95338IRTZ-T operates autonomously using default configurations set by external resistors (e.g., PROG pin for forward VOUT) and internal references. SMBus is optional and used only for dynamic reconfiguration - such as changing current limits, PROCHOT# thresholds, or soft-start timing - allowing firmware-light designs where full programmability is not required.
ISL95338IRTZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
ISL95338IRTZ-T FAQ
1.How can I place an order for ISL95338IRTZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95338IRTZ-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 ISL95338IRTZ-T reliable?
The price and inventory of ISL95338IRTZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95338IRTZ-T is usually 5 days.
3.What payment methods are accepted for ISL95338IRTZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95338IRTZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95338IRTZ-T?
ISL95338IRTZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95338IRTZ-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 ISL95338IRTZ-T?
For technical support, including ISL95338IRTZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95338IRTZ-T requirements.
6.How does Aetrix verify that ISL95338IRTZ-T is sourced from the original manufacturer or authorized distributors?
All ISL95338IRTZ-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 ISL95338IRTZ-T meets industry standards.
7.What is the process for return or replacement of ISL95338IRTZ-T?
All ISL95338IRTZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL95338IRTZ-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 ISL95338IRTZ-T part is unused and in its original packaging.
Return procedure for ISL95338IRTZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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