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Renesas ISL9111EH30Z-T7A
- Part No.:
- ISL9111EH30Z-T7A
- Manufacturer:
- Renesas
- Package:
- SOT-23-6
- Datasheet:
-
ISL9111EH30Z-T7A.pdf
- Description:
- IC REG BOOST 3V 800MA 6SOT
- Quantity:
- Payment:
- Shipping:
Inventory:2,154
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Product details
Overview
ISL9111EH30Z-T7A from Renesas (formerly Intersil) is a low-input-voltage, high-efficiency synchronous boost converter with integrated 1A N- and P-channel MOSFETs, delivering fixed 3.0V output from single-cell alkaline/NiMH batteries down to 0.8V start-up voltage. It achieves up to 97% efficiency at typical loads, supports 100mA output at VIN = 0.9V, and features output disconnect during shutdown for battery preservation in portable medical and USB-OTG devices.
For engineers reviewing the ISL9111EH30Z-T7A datasheet, ISL9111EH30Z-T7A pinout, ISL9111EH30Z-T7A application, or ISL9111EH30Z-T7A equivalent, key selection criteria include minimum 0.8V start-up capability, 3.0V fixed output accuracy (±100mV), 20µA quiescent current in skip mode, and fault reporting via dedicated FAULT pin - all critical for ultra-low-power battery-powered systems.
Technical Context
The ISL9111EH30Z-T7A implements peak current-mode PWM control with internal compensation and a 1.2MHz oscillator, enabling stable regulation using only a 4.7µH inductor and ceramic capacitors. Its synchronous rectification replaces lossy Schottky diodes with low-rDS(ON) MOSFETs (0.2Ω N-ch / 0.35Ω P-ch), minimizing conduction loss.
It operates in two modes: continuous PWM above light load thresholds and skip mode below - reducing quiescent current to 20µA while maintaining regulated output. UVLO is enabled (shut-off at 0.7V), distinguishing it from the ISL9111A variant and protecting rechargeable cells from over-discharge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±100mV - ensures stable rail for 3.0V logic without external feedback resistors. |
| Start-up Voltage | 0.8V typical - enables operation from deeply discharged single-cell alkaline or NiMH batteries. |
| Quiescent Current | 20µA typical in skip mode - extends battery life in standby or intermittent-use applications. |
| Switching Frequency | 1.2MHz ±200kHz - allows use of miniature 4.7µH inductors and low-ESR ceramic capacitors. |
| Peak Switch Current | 1.0A typical - supports ≥100mA output at VIN = 0.9V and VOUT = 3.0V with margin. |
| UVLO Threshold | 0.70V typical - disables output before rechargeable battery damage occurs. |
| Fault Reporting | Dedicated open-drain FAULT pin - signals low on OVP (ADJ only), OTP, short circuit, or undervoltage. |
Pinout & Package
ISL9111EH30Z-T7A is housed in a Pb-free 6-lead SOT-23 package (JEDEC MO-178AB, pkg drawing P6.064), optimized for space-constrained portable designs with thermal resistance θJA = 146°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SW | Switching node | Connects to inductor; carries high-frequency pulsed current; requires low-inductance layout. |
| 2 - GND | Power and signal ground | Common reference for all internal circuits; must be tied to solid ground plane. |
| 3 - EN | Enable input | Active-high logic control; pulls device into <1µA shutdown when low. |
| 4 - FAULT | Fault indicator output | Open-drain output pulled low under fault conditions; requires external pull-up. |
| 5 - VOUT | Regulated output | Delivers fixed 3.0V; connects to load and output capacitor (4.7µF ceramic recommended). |
| 6 - VIN | Input supply | Accepts 0.8V–(VOUT−200mV); requires local 4.7µF ceramic decoupling to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous boost architecture | Integrated 0.2Ω N-ch and 0.35Ω P-ch MOSFETs eliminate Schottky losses, enabling >90% efficiency at light loads. |
| Output disconnect during shutdown | Zero leakage path between VIN and VOUT when disabled - prevents battery drain in off-state. |
| Digital soft-start | Linear pre-charge phase limits inrush current; ramps peak inductor current to 1A over ~1ms. |
| Thermal shutdown with hysteresis | Shuts down at 150°C; restarts at ~125°C - protects against sustained overload or poor PCB cooling. |
| Fixed-output configuration | No external feedback resistors needed - simplifies BOM and layout for 3.0V systems. |
Applications
| Portable HDMI Transmitters | Wireless Peripherals |
|---|---|
Use Scenario: Powering HDMI level-shifters and TMDS drivers from single AA/AAA cells in compact dongles. IC Role / Device Role / Timing Role: Primary 3.0V rail generator with fast transient response and low-noise output. Use Value: Enables reliable HDMI compliance at 0.9V input, extending runtime beyond legacy diode-based solutions. |
Use Scenario: Supplying 3.0V to Bluetooth radio ICs and MCU in wireless mice/keyboards. IC Role / Device Role / Timing Role: Efficient step-up regulator supporting burst-mode RF transmission. Use Value: 20µA quiescent current in skip mode maximizes shelf life and active session duration. |
| Personal Medical Devices | USB-OTG Host Power |
Use Scenario: Providing regulated 3.0V to glucose meters, pulse oximeters, and hearing aids. IC Role / Device Role / Timing Role: Primary power source with battery-preserving shutdown and fault visibility. Use Value: UVLO at 0.7V prevents NiMH cell damage; FAULT pin enables system-level battery health monitoring. |
Use Scenario: Delivering 3.0V VBUS-equivalent power from single-cell batteries to enable USB-OTG host mode. IC Role / Device Role / Timing Role: Compact, high-efficiency boost converter meeting USB power delivery timing constraints. Use Value: 1.2MHz switching avoids audible noise; output disconnect prevents backfeed into depleted battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL9111EH33Z-T7A | Fixed 3.3V output; identical start-up voltage (0.8V), quiescent current (20µA), and package. | Targeted at 3.3V microcontrollers and sensors instead of 3.0V logic or analog rails. | Select when system requires 3.3V nominal supply with same low-voltage capability and footprint. |
| TPS610993DRCR | 3.3V fixed output; lower 0.7V start-up; 300nA shutdown current; no FAULT pin; 2x2mm WSON-6. | Better suited for ultra-low-IQ wearables but lacks fault reporting and UVLO protection for rechargeables. | Choose for longest battery life in non-rechargeable applications where fault visibility is not required. |
Compared with ISL9111EH30Z-T7A, ISL9111EH33Z-T7A offers identical performance with a +0.3V output offset for 3.3V systems, while TPS610993DRCR trades fault reporting and UVLO for sub-µA shutdown - making the ISL9111EH30Z-T7A optimal for protected, 3.0V rechargeable-battery designs.
Availability
ISL9111EH30Z-T7A is available at Aetrix Electronics and suitable for portable medical devices, USB-OTG accessories, and wireless peripherals requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for ISL9111EH30Z-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 industrial, automotive, and consumer markets with high-reliability semiconductor solutions.
The ISL9111 series was designed specifically for ultra-low-voltage, high-efficiency boost conversion in single- and multi-cell battery-powered portable electronics - prioritizing start-up capability, quiescent current, and integrated protection.
FAQ
What is the minimum input voltage required to start up the ISL9111EH30Z-T7A?
The ISL9111EH30Z-T7A has a typical start-up voltage of 0.8V, allowing it to begin operation from a single deeply discharged alkaline or NiMH cell. This value is confirmed across operating temperature (−20°C to +85°C) and is distinct from the 0.7V UVLO threshold that triggers shutdown after startup. The ISL9111EH30Z-T7A will not initiate regulation below 0.8V, even with EN asserted high.
Does the ISL9111EH30Z-T7A require external feedback resistors to set its output voltage?
No - the ISL9111EH30Z-T7A is a fixed-output variant delivering 3.0V without external resistors. Its internal voltage divider eliminates the need for FB network components, reducing BOM count and layout area. This contrasts with the ISL9111EHADJZ-T7A, which requires two external resistors to program VOUT. The ISL9111EH30Z-T7A's output accuracy is specified as ±100mV at 50mA load and 25°C.
How does the FAULT pin on the ISL9111EH30Z-T7A behave during over-temperature events?
When die temperature exceeds 150°C, the ISL9111EH30Z-T7A asserts the FAULT pin low and halts switching. The pin remains low until the junction cools to approximately 125°C (25°C hysteresis), at which point the device automatically resumes operation. This behavior is documented in Table 1 of the FN7602 datasheet and applies identically to all fault conditions including short circuit and UVLO.
Can the ISL9111EH30Z-T7A drive a 100mA load from a 0.9V input?
Yes - the ISL9111EH30Z-T7A is guaranteed to deliver 100mA at VOUT = 3.0V when VIN = 0.9V, as specified in the datasheet's "Features" section and confirmed in Figure 7 (Efficiency at VOUT = 3.0V). This capability relies on its 1A internal switch, low rDS(ON) MOSFETs, and 1.2MHz switching frequency enabling efficient energy transfer even at ultra-low input voltages.
What protection features are included in the ISL9111EH30Z-T7A?
The ISL9111EH30Z-T7A integrates thermal shutdown (150°C trip), output disconnect during shutdown, and UVLO (0.7V cutoff). Unlike the ADJ variants, it does not include overvoltage protection (OVP), as OVP is exclusive to adjustable-output versions. Fault conditions - including thermal events, short circuits, and low-VIN lockout - are reported via the open-drain FAULT pin, enabling system-level diagnostics.
ISL9111EH30Z-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 2.8V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 800mA (Switch)
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-SOT
ISL9111EH30Z-T7A FAQ
1.How can I place an order for ISL9111EH30Z-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9111EH30Z-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 ISL9111EH30Z-T7A reliable?
The price and inventory of ISL9111EH30Z-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9111EH30Z-T7A is usually 5 days.
3.What payment methods are accepted for ISL9111EH30Z-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9111EH30Z-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9111EH30Z-T7A?
ISL9111EH30Z-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9111EH30Z-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 ISL9111EH30Z-T7A?
For technical support, including ISL9111EH30Z-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9111EH30Z-T7A requirements.
6.How does Aetrix verify that ISL9111EH30Z-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9111EH30Z-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 ISL9111EH30Z-T7A meets industry standards.
7.What is the process for return or replacement of ISL9111EH30Z-T7A?
All ISL9111EH30Z-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9111EH30Z-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 ISL9111EH30Z-T7A part is unused and in its original packaging.
Return procedure for ISL9111EH30Z-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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