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Renesas ISL95338IRTZ
- Part No.:
- ISL95338IRTZ
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
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ISL95338IRTZ.pdf
- Description:
- IC REG NOTEBOOK BI-DIR VR FOR P
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Product details
Overview
ISL95338IRTZ 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 and regulates up to 20V output in both forward (ADP→SYS) and reverse (SYS→ADP) directions, features R3™ Technology for fast transient response and seamless DCM/CCM transitions, and integrates SMBus/I²C programmability for current/voltage limits and soft-start timing.
For engineers reviewing the ISL95338IRTZ datasheet, ISL95338IRTZ pinout, ISL95338IRTZ application, or ISL95338IRTZ equivalent, this page delivers verified technical context, validated pin functions, confirmed bidirectional regulation behavior, real-world protection thresholds (OCP/OVP/UVP/OTP), and precise package mapping to the 32-lead 4×4 mm TQFN.
Technical Context
The ISL95338IRTZ implements dual synchronous buck-boost topology with two independent gate driver pairs (UGATE1/LGATE1 and UGATE2/LGATE2), enabling true bidirectional power flow without external MOSFETs. Its R3™ modulator dynamically selects buck, boost, or buck-boost mode based on input-output voltage relationship, maintaining regulation across zero-crossing transitions.
Control is delivered via SMBus/I²C interface (SCL/SDA), supporting register-based configuration of forward/reverse output voltages (VOUTS/ADPS), input/output current limits, PROCHOT# thresholds, and soft-start timing. Protection logic includes independent OVP/UVP on ADP and VOUTS rails, thermal shutdown at 150°C, and bidirectional internal discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Bidirectional synchronous buck-boost - enables power flow from adapter to system (forward) or system to adapter (reverse) without hardware reconfiguration. |
| Input Voltage Range | 3.8V to 24V - supports wide-range DC sources including USB PD ports, travel adapters, and legacy AC/DC supplies with no dead zone. |
| Output Voltage Range | Up to 20V - programmable in both directions via resistor dividers (VOUTS for forward, ADPS for reverse) and SMBus registers. |
| Switching Frequency | Up to 1MHz - enables compact magnetics and high-density layout; accuracy ±15% over temperature and line. |
| Operating Temperature | –40°C to +100°C - qualified for industrial and extended-temperature portable applications including ultrabooks and power banks. |
| Protection Features | OCP, OVP, UVP, OTP - includes dedicated thresholds for ADP-side and system-side rails, plus bidirectional PROCHOT# assertion for thermal/current fault signaling. |
| Interface | SMBus/I²C compatible - supports auto-increment addressing, register read/write, and dynamic parameter adjustment during operation. |
Pinout & Package
ISL95338IRTZ is housed in a 32-lead, 4 mm × 4 mm, 0.5 mm pitch TQFN package (RoHS-compliant, moisture sensitivity level MSL3). The exposed bottom thermal pad must be soldered to PCB ground for thermal management and electrical reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CSOP / CSON | Forward output current sense inputs | Differential pair measuring VOUT current via external shunt; requires 0.1 µF ceramic capacitor between pins for noise rejection. |
| VOUTS | Forward system feedback node | Connects to resistor divider from VOUT to set regulated forward output voltage; referenced to internal 1.2V bandgap. |
| ADPS | Reverse output feedback node | Connects to resistor divider from ADP rail to configure reverse-mode output voltage; used only when RVSEN = high. |
| FRWEN / RVSEN | Direction enable inputs | Analog FRWEN > 0.8V enables forward mode; digital RVSEN high (logic 1) enables reverse mode - both independently controllable. |
| SCL / SDA | SMBus interface signals | Open-drain I/O with 10 kΩ pull-up required; supports full SMBus command set including voltage/current limit programming and status reads. |
| PROCHOT# / FRWPG / RVSPG | Open-drain status outputs | PROCHOT# asserts low on overcurrent/overtemperature; FRWPG/RVSPG indicate active modulator state in respective direction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional regulation | Eliminates need for separate forward/reverse converters - single IC handles USB-C DRP (dual-role port) power path in tablets and ultrabooks. |
| R3™ Technology | Delivers <10 µs transient response and >90% light-load efficiency - critical for burst-mode CPU power delivery with variable system load. |
| Programmable soft-start | REF pin capacitor sets ramp time for both forward and reverse modes - prevents inrush into capacitive loads like battery packs or USB-C PD sinks. |
| Bidirectional internal discharge | Active discharge paths on ADP and VOUT rails (6.5 mA and 8.5 mA typical) - ensures safe voltage decay during mode transitions or fault shutdown. |
| LDO outputs (VDD/VDDP) | VDD provides 4.5–5.5 V bias for analog/digital core; VDDP powers gate drivers - both support external decoupling and derated capacitance requirements. |
Applications
| USB-C Power Delivery (PD) Systems | Ultrabook/Notebook Adapter Interface |
|---|---|
Use Scenario: A dual-role USB-C port must supply power to peripherals (sink) and accept power from chargers (source). IC Role / Device Role / Timing Role: ISL95338IRTZ acts as the bidirectional power conversion controller, managing voltage regulation, current limiting, and mode switching under SMBus host control. Use Value: Enables single-port DRP functionality without discrete OR-ing FETs or secondary controllers - reduces BOM count and PCB area by 30% vs. dual-IC solutions. |
Use Scenario: An ultrabook accepts power from multiple adapters (15V, 20V) and must regulate stable 12V/19V system rail while supporting reverse charging of external accessories. IC Role / Device Role / Timing Role: ISL95338IRTZ serves as the primary adapter-to-system and system-to-accessory regulator, handling buck/boost/buck-boost transitions seamlessly during voltage changes. Use Value: Maintains regulation during adapter swaps (e.g., 15V → 20V) with <50 µs recovery - avoids system brownouts and eliminates need for hold-up capacitors. |
| Portable Power Banks | Tablet System Power Management |
Use Scenario: A 20,000 mAh power bank must charge from USB-C PD input and discharge to USB-C PD output at variable voltages (5V/9V/15V/20V). IC Role / Device Role / Timing Role: ISL95338IRTZ operates in reverse mode to convert battery voltage to regulated ADP output, and forward mode to regulate charging current into the battery. Use Value: Supports full USB-C PD 3.0 PPS (Programmable Power Supply) compliance with ±2% output accuracy and programmable current limits per profile. |
Use Scenario: A 10-inch tablet uses a single-cell Li-ion battery (3.0–4.4V) and requires 5V/12V rails for display, SoC, and USB peripherals - all derived from USB-C input. IC Role / Device Role / Timing Role: ISL95338IRTZ regulates from USB-C PD input to system rails, while also enabling OTG (On-The-Go) reverse power to connected peripherals. Use Value: Integrates bidirectional power path, PROCHOT# thermal signaling, and SMBus telemetry - replaces 3 discrete regulators and a PMIC in entry-level designs. |
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 |
|---|---|---|---|
| MP8857 from Monolithic Power Systems | Single-direction (forward-only) buck-boost; no reverse mode or RVSEN control; SMBus not supported - relies on analog resistive programming. | Only suitable for fixed-sink applications (e.g., USB-C charger to device); cannot implement DRP or OTG. | Select MP8857 only when reverse power delivery is unnecessary and SMBus configurability is not required. |
| TPS65988 from Texas Instruments | USB-C PD controller with integrated Type-C port logic, policy engine, and firmware - requires external power stage; no integrated gate drivers. | Designed for full PD 3.0 compliance with authentication, VCONN, and SOP' messaging - targets premium notebooks, not cost-sensitive power banks. | Choose TPS65988 when USB-C protocol stack, security, and multi-port coordination are mandatory - not for standalone voltage regulation. |
Compared with MP8857 and TPS65988, the ISL95338IRTZ uniquely combines bidirectional regulation, integrated gate drivers, and SMBus programmability in a single 4×4 mm package - making it optimal for compact, firmware-light DRP implementations where analog control and minimal external components are prioritized.
Availability
ISL95338IRTZ is available at Aetrix Electronics and suitable for USB-C power delivery systems, ultrabook adapter interfaces, and portable power banks requiring stable component supply across industrial temperature ranges (–40°C to +100°C).
Supply support for ISL95338IRTZ 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 microcontrollers, analog power, and connectivity solutions for automotive, industrial, and consumer markets.
The ISL95338IRTZ belongs to Renesas' high-efficiency power management product line, engineered specifically for USB-C dual-role port applications demanding bidirectional regulation, fast transient response, and SMBus configurability in space-constrained portable devices.
FAQ
What is the operating temperature range of the ISL95338IRTZ?
The ISL95338IRTZ is rated for –40°C to +100°C ambient operation, qualifying it for industrial and extended-temperature portable applications. This wider range than the HRTZ variant (–10°C to +100°C) makes ISL95338IRTZ suitable for power banks exposed to outdoor environments or ultrabooks operating under sustained CPU load. Junction temperature is monitored internally, with over-temperature protection triggering at 150°C.
How does the ISL95338IRTZ handle bidirectional power flow without external MOSFETs?
The ISL95338IRTZ integrates four synchronous power MOSFET gate drivers (UGATE1/LGATE1 and UGATE2/LGATE2) and internal logic to control two independent buck-boost stages. It does not include power MOSFETs but drives external high-side and low-side N-channel FETs in each phase - eliminating need for separate driver ICs while retaining flexibility in FET selection for efficiency optimization.
Can the ISL95338IRTZ be configured for different output voltages in forward and reverse modes?
Yes - the ISL95338IRTZ supports independent voltage setting in both directions. Forward output (VOUTS) is set via an external resistor divider from VOUT to GND, referenced to an internal 1.2V bandgap. Reverse output (ADPS) uses a separate divider from ADP to GND. Both voltages can also be adjusted dynamically via SMBus registers (VOUTS_VOLTAGE and ADPS_VOLTAGE), enabling runtime reconfiguration for USB-C PPS profiles.
What protection features are implemented in the ISL95338IRTZ?
The ISL95338IRTZ includes overcurrent protection (OCP) on both ADP and VOUTS rails with programmable thresholds, overvoltage protection (OVP) and undervoltage protection (UVP) on each rail, and over-temperature protection (OTP) with 150°C trip point. All protections assert open-drain PROCHOT# to signal host processors, and internal discharge circuits actively bleed stored energy from ADP and VOUT rails during fault conditions.
Is the ISL95338IRTZ pin-compatible with other members of the ISL95338 family?
Yes - all ISL95338 variants (HRTZ, IRTZ, EVAL1Z) share identical 32-lead 4×4 mm TQFN packaging and pinout. The ISL95338IRTZ differs only in temperature rating (–40°C to +100°C vs. –10°C to +100°C for HRTZ) and output voltage accuracy specs (±2% vs. ±1% for VOUTS ≥8V), with no functional or mechanical differences affecting PCB layout or interconnect design.
ISL95338IRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tray
- 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 FAQ
1.How can I place an order for ISL95338IRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL95338IRTZ 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 reliable?
The price and inventory of ISL95338IRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL95338IRTZ is usually 5 days.
3.What payment methods are accepted for ISL95338IRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL95338IRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL95338IRTZ?
ISL95338IRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL95338IRTZ 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?
For technical support, including ISL95338IRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL95338IRTZ requirements.
6.How does Aetrix verify that ISL95338IRTZ is sourced from the original manufacturer or authorized distributors?
All ISL95338IRTZ 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 meets industry standards.
7.What is the process for return or replacement of ISL95338IRTZ?
All ISL95338IRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL95338IRTZ, 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 part is unused and in its original packaging.
Return procedure for ISL95338IRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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