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Renesas ISL9111EH30Z-T
- Part No.:
- ISL9111EH30Z-T
- Manufacturer:
- Renesas
- Package:
- SOT-23-6
- Datasheet:
-
ISL9111EH30Z-T.pdf
- Description:
- IC REG BOOST 3V 800MA 6SOT
- Quantity:
- Payment:
- Shipping:
Inventory:4,184
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Product details
Overview
ISL9111EH30Z-T from Intersil is a low-input-voltage, high-efficiency synchronous boost converter with integrated 1A N- and P-channel MOSFETs, delivering a fixed 3.0V output. It starts up at 0.8V (typ), operates down to 0.7V, delivers 100mA at VIN = 0.9V, and achieves up to 97% efficiency-designed for single-cell alkaline/NiMH-powered portable medical devices and USB-OTG peripherals.
For engineers reviewing the ISL9111EH30Z-T datasheet, ISL9111EH30Z-T pinout, ISL9111EH30Z-T application, or ISL9111EH30Z-T equivalent, key selection criteria include minimum start-up voltage, light-load quiescent current (20µA), fault reporting via FAULT pin, and compatibility with tiny 4.7µH inductors and ceramic capacitors in space-constrained battery-powered designs.
Technical Context
The ISL9111EH30Z-T implements peak current-mode PWM control with internal compensation and a fixed 1.2MHz switching frequency. Its synchronous rectification replaces Schottky diodes with low-rDS(ON) MOSFETs (0.2Ω N-ch / 0.35Ω P-ch), enabling high efficiency across input ranges from 0.8V to VOUT − 200mV.
It features digital soft-start, skip mode operation below light loads to maintain 20µA quiescent current, undervoltage lockout (UVLO) at 0.7V, thermal shutdown at 150°C, and output disconnect during shutdown-ensuring battery preservation in non-rechargeable systems where deep discharge must be avoided.
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 components. |
| Start-up Voltage | 0.8V (typ) - enables operation from nearly depleted single-cell alkaline or NiMH batteries. |
| Quiescent Current | 20µA (typ) - extends battery life in standby or low-duty-cycle applications like wireless keyboards. |
| Switching Frequency | 1.2MHz (typ) - allows use of miniature 4.7µH inductors and low-ESR ceramic capacitors for compact PCB layouts. |
| Peak Switch Current | 1.0A (typ) - supports ≥100mA output at VIN = 0.9V, sufficient for HDMI port power or sensor biasing. |
| UVLO Threshold | 0.7V (typ) - protects rechargeable cells from over-discharge by disabling output before irreversible damage occurs. |
| Fault Reporting | Active-low FAULT pin - signals UVLO, short circuit, or thermal shutdown, enabling host MCU fault recovery. |
Pinout & Package
ISL9111EH30Z-T is housed in a Pb-free 6-lead SOT-23 package (JEDEC MO-178AB, pkg drawing P6.064), optimized for thermal performance (θJA = 146°C/W) and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switching node | Connects to inductor; carries high di/dt current-requires short, wide trace routing to minimize EMI and voltage spikes. |
| 2 GND | Power ground | Primary return path for switch current and IC bias; must connect to solid ground plane for stability and noise immunity. |
| 3 EN | Enable input | Active-high logic control (0.8×VIN high, 0.2×VIN low); pulls device into <1µA shutdown when low, with full output disconnect. |
| 4 FAULT | Fault indicator | Open-drain output pulled low during UVLO, short circuit, OVP (not applicable here), or thermal shutdown-requires external pull-up. |
| 5 VOUT | Regulated output | Delivers fixed 3.0V; connects directly to load and output capacitor-must be decoupled with 4.7µF ceramic near the pin. |
| 6 VIN | Input supply | Accepts 0.8V–(VOUT−200mV); requires 4.7µF ceramic capacitor placed adjacent to pin and GND for low-impedance source. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous boost architecture | Integrates matched N- and P-channel MOSFETs (0.2Ω/0.35Ω rDS(ON)) to eliminate Schottky losses and achieve >90% efficiency at light loads. |
| Skip mode operation | Reduces quiescent current to 20µA under light load while maintaining regulation-critical for multi-month battery life in intermittent-use devices. |
| Digital soft-start | Linear ramp-up limits inrush current during enable, preventing input voltage droop and ensuring reliable startup from weak batteries. |
| Output disconnect on shutdown | Blocks reverse current flow from VOUT to VIN when EN = low-prevents battery drain during system sleep or off-state. |
| Integrated fault protection | Detects and reports UVLO, short-circuit, and thermal events via FAULT pin-enables robust system-level error handling without external monitoring. |
Applications
| Portable Medical Sensors | USB-OTG Power Delivery |
|---|---|
Use Scenario: Powering glucose meters or pulse oximeters using a single AA alkaline cell. IC Role / Device Role / Timing Role: Primary 3.0V rail generator with ultra-low start-up voltage and battery-preserving shutdown. Use Value: Enables operation down to 0.8V input, extending usable battery life by ~15% compared to conventional boost ICs. | Use Scenario: Providing 3.0V VBUS to USB-OTG peripherals in handheld scanners or diagnostic tools. IC Role / Device Role / Timing Role: Compact, efficient boost stage meeting USB-OTG voltage tolerance and transient response requirements. Use Value: Delivers stable 3.0V at 100mA with <1.5% ripple, supporting enumeration and data transfer without host negotiation failure. |
| Wireless Input Devices | Low-Power Display Backlight Drivers |
Use Scenario: Supplying 3.0V to RF transceivers and microcontrollers in Bluetooth keyboards/mice. IC Role / Device Role / Timing Role: Always-on power source with <1µA shutdown current and fast wake-up from EN assertion. Use Value: Achieves >6-month battery life on two AAA cells due to 20µA quiescent current and zero-load disconnect. | Use Scenario: Biasing white LED strings in portable diagnostic displays powered by single-cell NiMH. IC Role / Device Role / Timing Role: Fixed-output boost converter driving constant-current LED driver ICs requiring clean 3.0V supply. Use Value: Maintains ±100mV output accuracy across temperature, preventing LED brightness drift during clinical use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCT | Fixed 3.0V output; 0.3V min start-up; no UVLO; 1.5MHz switching; 0.35Ω switch RDS(ON) | Lacks UVLO and FAULT pin-unsuitable for rechargeable battery protection or fault-aware systems. | Prefer ISL9111EH30Z-T when UVLO-triggered battery protection or fault signaling is required. |
| MAX77801EWA+T | Adjustable output only; includes I²C interface and programmable soft-start; 0.7V min start-up; 1.2MHz | Requires external resistors and firmware control-adds complexity for simple fixed-voltage needs. | Choose ISL9111EH30Z-T for drop-in simplicity, no configuration overhead, and guaranteed 3.0V accuracy. |
Compared with TPS61200DRCT and MAX77801EWA+T, the ISL9111EH30Z-T uniquely combines fixed 3.0V output, 0.8V start-up, integrated UVLO, and a dedicated FAULT pin-all in a 6-pin SOT-23-making it optimal for cost-sensitive, battery-critical portable medical and human-interface devices.
Availability
ISL9111EH30Z-T is available at Aetrix Electronics and suitable for portable medical sensors, USB-OTG peripherals, and wireless input devices requiring stable component supply with long-term lifecycle support.
Supply support for ISL9111EH30Z-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
Intersil Corporation is a leading provider of precision analog and power management ICs, now part of Renesas Electronics, with expertise in high-efficiency DC-DC conversion and battery-powered system solutions.
The ISL9111 product line was designed specifically for ultra-low-voltage, single-cell battery applications-prioritizing start-up capability, light-load efficiency, and integrated protection in minimal footprint packages.
FAQ
What is the minimum input voltage required for ISL9111EH30Z-T to start up?
The ISL9111EH30Z-T has a typical start-up voltage of 0.8V and guarantees operation down to 0.7V after startup. This enables reliable initialization from nearly exhausted single-cell alkaline or NiMH batteries, a critical feature for long-life portable medical and consumer devices. The UVLO threshold is fixed at 0.7V to protect rechargeable cells from over-discharge.
Does ISL9111EH30Z-T require external feedback resistors to set its output voltage?
No, the ISL9111EH30Z-T is a fixed 3.0V output version and contains an internal voltage divider-no external resistors are needed. This simplifies design, reduces BOM count, and ensures ±100mV output accuracy across temperature and load. External feedback is only required for the ADJ variants (e.g., ISL9111EHADJZ-T).
How does the FAULT pin on ISL9111EH30Z-T behave during fault conditions?
The FAULT pin on ISL9111EH30Z-T is an open-drain output that pulls low during UVLO (VIN < 0.7V), short-circuit, or thermal shutdown. It remains asserted until the fault condition clears and VIN/VOUT collapse sufficiently. The pin sinks up to 10mA when low and exhibits <100nA leakage when high-enabling direct interfacing with most microcontroller GPIOs.
Can ISL9111EH30Z-T safely power a 3.0V load from a single 1.2V NiMH cell?
Yes, the ISL9111EH30Z-T is explicitly rated for operation from 1.2V NiMH cells. At VIN = 1.2V, it delivers 3.0V at up to 100mA with >90% efficiency and maintains regulation across load and temperature. Its 1.2MHz switching frequency and internal MOSFETs eliminate need for external rectifiers, simplifying implementation.
What package type and thermal characteristics does ISL9111EH30Z-T use?
The ISL9111EH30Z-T uses a Pb-free 6-lead SOT-23 package (JEDEC MO-178AB, drawing P6.064) with θJA = 146°C/W. Its compact footprint and exposed pad–free design suit high-density layouts, while the specified thermal resistance enables operation up to +85°C ambient-validated across medical, industrial, and consumer use cases.
ISL9111EH30Z-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):
- 0.8V
- 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-T FAQ
1.How can I place an order for ISL9111EH30Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9111EH30Z-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 ISL9111EH30Z-T reliable?
The price and inventory of ISL9111EH30Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9111EH30Z-T is usually 5 days.
3.What payment methods are accepted for ISL9111EH30Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9111EH30Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9111EH30Z-T?
ISL9111EH30Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9111EH30Z-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 ISL9111EH30Z-T?
For technical support, including ISL9111EH30Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9111EH30Z-T requirements.
6.How does Aetrix verify that ISL9111EH30Z-T is sourced from the original manufacturer or authorized distributors?
All ISL9111EH30Z-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 ISL9111EH30Z-T meets industry standards.
7.What is the process for return or replacement of ISL9111EH30Z-T?
All ISL9111EH30Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9111EH30Z-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 ISL9111EH30Z-T part is unused and in its original packaging.
Return procedure for ISL9111EH30Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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