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Renesas ISL9111AEH30Z-T
- Part No.:
- ISL9111AEH30Z-T
- Manufacturer:
- Renesas
- Package:
- SOT-23-6
- Datasheet:
-
ISL9111AEH30Z-T.pdf
- Description:
- IC REG BOOST 3V 800MA 6SOT
- Quantity:
- Payment:
- Shipping:
Inventory:4,618
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Product details
Overview
ISL9111AEH30Z-T from Renesas (formerly Intersil) is a low-input-voltage, high-efficiency synchronous boost converter with integrated 1A N-channel and P-channel MOSFETs, delivering a fixed 3.0V output. It starts up from as low as 0.6V input, operates down to 0.5V after startup, and achieves up to 97% efficiency at typical loads-enabling extended runtime in single-cell alkaline/NiMH-powered portable medical devices and wireless peripherals.
For engineers reviewing the ISL9111AEH30Z-T datasheet, ISL9111AEH30Z-T pinout, ISL9111AEH30Z-T application, or ISL9111AEH30Z-T equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters for battery-constrained designs, and real-world alternative options with documented functional trade-offs.
Technical Context
The ISL9111AEH30Z-T 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 across light-to-moderate loads.
Unlike the ISL9111 variant, the ISL9111A disables UVLO to maximize usable battery life in non-rechargeable systems; it enters skip mode below ~10mA load, reducing quiescent current to 20µA while maintaining regulated 3.0V output. Fault protection includes thermal shutdown (150°C), short-circuit detection, and output disconnect during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.0V ±100mV - tightly regulated for powering 3.0V logic rails without external feedback resistors. |
| Start-up voltage | 0.6V typical - enables operation from deeply discharged single-cell alkaline batteries. |
| Operating voltage range | 0.5V to VOUT−200mV - supports full functionality down to near-dead battery states. |
| Switching frequency | 1.2MHz (1.0–1.4MHz) - allows use of miniature 4.7µH inductors and low-ESR ceramic capacitors. |
| Peak switch current | 1.0A typical - sustains ≥240mA output at 3.3V from 1.8V input, scaled for 3.0V output. |
| Quiescent current | 20µA typical in skip mode - extends battery life in standby or ultra-low-power sensor nodes. |
| Efficiency | Up to 97% at typical loads - minimizes heat generation and maximizes energy extraction from primary cells. |
Pinout & Package
ISL9111AEH30Z-T is housed in a Pb-free 6-lead SOT-23 package (JEDEC MO-178AB, pkg drawing P6.064), optimized for space-constrained portable PCBs with thermal resistance θJA = 146°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switching node | Connects to inductor's switched terminal; carries high di/dt current and requires short, wide trace routing. |
| 2 GND | Power ground | Primary return path for input, output, and switching currents; must connect to solid ground plane. |
| 3 EN | Enable input | Active-high logic control (0.8×VIN threshold); pulls device into <1µA shutdown when low. |
| 4 FAULT | Fault indicator | Open-drain output pulled low during thermal shutdown, short circuit, or output undervoltage (ISL9111 only). |
| 5 VOUT | Regulated output | Delivers fixed 3.0V to load; requires local 4.7µF ceramic capacitor placed adjacent to pin. |
| 6 VIN | Input supply | Accepts 0.5–3.0V input; requires 4.7µF ceramic capacitor tied directly to GND for stability. |
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. |
| Ultra-low start-up voltage | 0.6V minimum - extracts usable energy from single-cell alkaline batteries beyond conventional cutoff. |
| Skip mode operation | Reduces quiescent current to 20µA under light load while maintaining regulation, extending battery life in intermittent-use devices. |
| Output disconnect on shutdown | Prevents battery drain during system sleep by blocking conduction path between VIN and VOUT via body-diode reversal. |
| Fault reporting via FAULT pin | Open-drain signal alerts host MCU of thermal shutdown, short circuit, or output collapse - no external monitoring circuit needed. |
Applications
| Portable Medical Sensors | Wireless Keyboard/Mouse |
|---|---|
Use Scenario: Battery-powered glucose meters and pulse oximeters requiring stable 3.0V rail from a single AA/AAA cell. IC Role / Device Role / Timing Role: Primary voltage booster supplying regulated 3.0V to microcontroller, display, and analog front-end. Use Value: 0.6V start-up and 0.5V operating capability enable full device functionality until battery depletion, increasing usable test cycles per battery. |
Use Scenario: Compact HID peripherals using single alkaline cell with burst-mode RF transmission. IC Role / Device Role / Timing Role: Efficient power conversion for 3.0V logic and 2.4GHz transceiver ICs during active polling intervals. Use Value: 97% peak efficiency and 20µA skip-mode current minimize average power draw, extending battery life to >12 months. |
| Bluetooth Headsets | MP3/MP4 Players |
Use Scenario: Miniature audio accessories powered by one NiMH cell, demanding low-noise 3.0V supply for codec and Bluetooth SoC. IC Role / Device Role / Timing Role: Low-ripple synchronous boost converter feeding audio subsystem and radio interface. Use Value: 1.2MHz switching avoids audible noise bands; output disconnect prevents battery leakage during storage. |
Use Scenario: Portable media players using single-cell alkaline batteries to power display, flash memory, and audio DAC. IC Role / Device Role / Timing Role: Main DC-DC converter generating 3.0V system rail from variable battery voltage (1.5V → 0.8V). Use Value: Fixed 3.0V output eliminates need for external feedback network, reducing BOM count and layout area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCT | 0.3V start-up, 3.0V fixed output, 0.7A switch, 1.2MHz, but lacks FAULT pin and output disconnect. | Better for ultra-low-VIN primary-cell apps where fault reporting is secondary; unsuitable where battery isolation is required. | Choose TPS61200DRCT if start-up from sub-0.6V is critical and FAULT monitoring is omitted from system design. |
| MAX17062ETA+ | 0.5V start-up, 3.0V fixed output, 1.2A switch, 1.5MHz, includes OVP and thermal foldback but no FAULT pin. | Higher peak current supports heavier loads; no output disconnect limits battery shelf-life in always-connected systems. | Choose MAX17062ETA+ when driving higher-current peripherals (e.g., OLED displays) and FAULT signaling is handled externally. |
Compared with TPS61200DRCT and MAX17062ETA+, the ISL9111AEH30Z-T uniquely combines ultra-low 0.6V start-up, integrated FAULT reporting, and true output disconnect-making it optimal for long-shelf-life, safety-critical portable medical and consumer devices where battery preservation and fault visibility are mandatory.
Availability
ISL9111AEH30Z-T is available at Aetrix Electronics and suitable for portable medical sensors, wireless HID peripherals, Bluetooth headsets, and MP3/MP4 players requiring stable component supply with guaranteed long-term availability.
Supply support for ISL9111AEH30Z-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 Corporation (acquired Intersil in 2017) is a global leader in microcontrollers, analog, and power management solutions, serving automotive, industrial, and consumer markets with high-reliability silicon.
The ISL9111AEH30Z-T belongs to Renesas' legacy Intersil power management portfolio, specifically engineered for ultra-low-voltage, high-efficiency boosting in primary-cell-powered portable electronics.
FAQ
What is the minimum input voltage required for ISL9111AEH30Z-T to start up?
The ISL9111AEH30Z-T has a typical minimum start-up voltage of 0.6V with no load, enabling operation from nearly depleted single-cell alkaline batteries. This value is confirmed in the FN7602 datasheet Table on page 6 under "Minimum Start-up Voltage (ISL9111A)". The device remains functional down to 0.5V after startup, distinguishing it from the UVLO-enabled ISL9111 variant.
Does ISL9111AEH30Z-T include undervoltage lockout (UVLO)?
No, the ISL9111AEH30Z-T explicitly disables UVLO to maximize usable battery life in non-rechargeable applications. Unlike the ISL9111, which shuts down at 0.7V to protect rechargeable cells, the ISL9111A continues operating down to 0.5V input. This behavior is documented in the "Minimum Startup and Minimum Operating Voltage" section on page 8 of FN7602.
What is the purpose of the FAULT pin on ISL9111AEH30Z-T?
The FAULT pin on ISL9111AEH30Z-T is an open-drain output that asserts low during detected fault conditions-including thermal shutdown (>150°C), short circuit (VOUT < VIN), or output undervoltage (VOUT < 90% nominal). It is not used for overvoltage protection (OVP), which applies only to ADJ versions. This pin enables host MCU fault logging without additional sensing circuitry.
Can ISL9111AEH30Z-T be used with a 4.7µH inductor and ceramic capacitors?
Yes, the ISL9111AEH30Z-T is fully characterized for use with a 4.7µH inductor and 4.7µF ceramic input/output capacitors, as shown in Figures 1, 3A–5A and specified in the "Inductor Selection" and "Capacitor Selection" sections (pages 10–11) of FN7602. This combination ensures stable PWM/skip-mode transition and meets EMI requirements for portable designs.
How does ISL9111AEH30Z-T achieve output disconnect during shutdown?
During shutdown (EN = low), ISL9111AEH30Z-T actively reverses the polarity of the P-channel MOSFET's body diode using an internal circuit, breaking the conduction path between VIN and VOUT. This feature-described on page 8 under "Synchronous Rectifier"-prevents battery drain when the system is off, eliminating the need for external load switches or ideal diodes in battery-powered products.
ISL9111AEH30Z-T 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):
- 0.6V
- 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
ISL9111AEH30Z-T FAQ
1.How can I place an order for ISL9111AEH30Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9111AEH30Z-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 ISL9111AEH30Z-T reliable?
The price and inventory of ISL9111AEH30Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9111AEH30Z-T is usually 5 days.
3.What payment methods are accepted for ISL9111AEH30Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9111AEH30Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9111AEH30Z-T?
ISL9111AEH30Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9111AEH30Z-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 ISL9111AEH30Z-T?
For technical support, including ISL9111AEH30Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9111AEH30Z-T requirements.
6.How does Aetrix verify that ISL9111AEH30Z-T is sourced from the original manufacturer or authorized distributors?
All ISL9111AEH30Z-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 ISL9111AEH30Z-T meets industry standards.
7.What is the process for return or replacement of ISL9111AEH30Z-T?
All ISL9111AEH30Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9111AEH30Z-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 ISL9111AEH30Z-T part is unused and in its original packaging.
Return procedure for ISL9111AEH30Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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