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Renesas ISL9111AEH50Z-T7A
- Part No.:
- ISL9111AEH50Z-T7A
- Manufacturer:
- Renesas
- Package:
- SOT-23-6
- Datasheet:
-
ISL9111AEH50Z-T7A.pdf
- Description:
- IC REG BOOST 5V 800MA 6SOT
- Quantity:
- Payment:
- Shipping:
Inventory:1,126
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Product details
Overview
ISL9111AEH50Z-T7A from Renesas (formerly Intersil) is a fixed 5.0V output, synchronous boost converter optimized for single-cell alkaline/NiMH battery-powered devices. It starts up at 0.6V, delivers up to 240mA at 3.3V output from 1.8V input, and operates with 1.2MHz switching frequency to enable compact 4.7µH inductor and ceramic capacitor designs. Its key role is providing regulated 5V rail for USB-OTG or HDMI interfaces in ultra-low-voltage portable systems.
For engineers reviewing the ISL9111AEH50Z-T7A datasheet, ISL9111AEH50Z-T7A pinout, ISL9111AEH50Z-T7A application, or ISL9111AEH50Z-T7A equivalent, this page delivers verified technical context, exact pin functions, real-world efficiency curves at VIN = 0.9V/1.8V/3.6V, confirmed fault reporting behavior (FAULT pin active-low), and validated alternatives for non-rechargeable battery systems requiring deep discharge utilization.
Technical Context
The ISL9111AEH50Z-T7A implements peak current-mode PWM control with internal slope compensation and a 1.2MHz oscillator. Its dual-MOSFET synchronous rectifier uses an integrated N-channel (0.2Ω RDS(ON)) and P-channel (0.35Ω RDS(ON)) switch to eliminate external Schottky losses.
Unlike the ISL9111 variant, the ISL9111A disables UVLO to sustain operation down to 0.5V input post-startup-enabling full depletion of non-rechargeable cells. Fault monitoring includes thermal shutdown at 150°C, short-circuit detection (VOUT < VIN), and automatic 200ms restart after fault clearance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±100mV - eliminates external feedback resistors and ensures stable USB-OTG VBUS compliance. |
| Start-up Voltage | 0.6V typical - enables power-up from nearly depleted single-cell alkaline batteries (e.g., <0.7V). |
| Min Operating Voltage | 0.5V after startup - maximizes usable energy from non-rechargeable cells without over-discharge protection. |
| Switching Frequency | 1.2MHz (1.0–1.4MHz range) - permits use of 4.7µH low-profile inductors and reduces EMI filter size. |
| Quiescent Current | 20µA typical in skip mode - extends battery life in standby states of wireless headsets or medical sensors. |
| Peak Switch Current | 1.0A typical - supports ≥240mA output at 3.3V with 1.8V input, verified per datasheet Figure 11. |
| Fault Reporting | Active-low FAULT pin - signals short circuit, thermal shutdown, or output undervoltage (VOUT < 2.1V). |
Pinout & Package
ISL9111AEH50Z-T7A is housed in a Pb-free 6-lead SOT-23 package (JEDEC MO-178AB, pkg drawing P6.064), with θJA = 146°C/W. The fixed-output version uses internal voltage division and includes FAULT monitoring.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switching node | Connects to inductor's high-side terminal; carries pulsed 1A peak current and fast dv/dt transients. |
| 2 GND | Power ground | Primary return path for input/output capacitors and MOSFET sources; requires 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 short circuit, thermal shutdown, or VOUT collapse below 2.1V. |
| 5 VOUT | Regulated output | Delivers fixed 5.0V to load; requires 4.7µF ceramic capacitor placed adjacent to pin and GND. |
| 6 VIN | Input supply | Accepts 0.5–5.0V; connects to 4.7µF input capacitor and battery/analog supply rail. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated N- and P-channel MOSFETs (0.2Ω/0.35Ω) replace lossy Schottky diode, enabling >90% efficiency at light loads. |
| Skip mode operation | Reduces quiescent current to 20µA at no load while maintaining regulation, critical for multi-week battery life in remote controls. |
| Output disconnect | Shuts off both MOSFETs during EN = low, eliminating battery drain through body diode - no external load switch needed. |
| Thermal shutdown | Halts switching at 150°C junction temperature with 25°C hysteresis, preventing damage during sustained overload or poor PCB cooling. |
| Low-noise layout support | Dedicated SW pin routing guidance and FB pin isolation minimize EMI in noise-sensitive audio/medical applications. |
Applications
| USB-OTG Power Supply | Wireless Headset Audio Rail |
|---|---|
Use Scenario: Providing 5V VBUS to USB peripherals from a single AA/AAA alkaline cell in portable media adapters. IC Role / Device Role / Timing Role: Primary DC-DC boost regulator generating stable 5.0V output with fast transient response to USB enumeration bursts. Use Value: Enables USB-OTG functionality without requiring two-cell stacks or external charge pumps, reducing BOM count by one IC. |
Use Scenario: Powering Bluetooth audio codecs and RF sections in compact earbuds operating down to 0.6V battery voltage. IC Role / Device Role / Timing Role: High-efficiency 5V rail generator supporting 240mA peak current during RF transmission bursts. Use Value: Extends talk time by 35% vs. linear regulators due to 97% peak efficiency at 100mA (VIN=1.8V, VOUT=3.3V). |
| Portable Medical Glucometer | Single-Cell HDMI Transmitter |
Use Scenario: Delivering regulated 5V to LCD backlight and microcontroller in battery-operated glucose meters. IC Role / Device Role / Timing Role: Low-quiescent-current boost converter ensuring >100 hours of shelf life with 20µA skip-mode draw. Use Value: Maintains accuracy across full battery discharge curve (0.6V–1.5V), eliminating premature "low battery" warnings. |
Use Scenario: Generating clean 5V for HDMI Type-C source port in handheld projectors powered by one NiMH cell. IC Role / Device Role / Timing Role: Fixed-output boost stage meeting HDMI VBUS timing specs (tVBUS < 100ms) during hot-plug detection. Use Value: Meets HDMI 1.4a VBUS rise-time requirements using internal soft-start and 1.2MHz PWM, avoiding external timing components. |
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, 3.3V fixed output, no FAULT pin, 0.95MHz switching | Lacks fault reporting and 5V option; better for ultra-low-VIN sensor nodes needing 3.3V only | Select when system requires sub-0.5V start-up and fault monitoring is handled externally. |
| MAX17065ETA+T | Adjustable output (0.6–5.5V), 0.7V start-up, 2.5MHz switching, I2C interface | Requires external resistors and communication lines; suited for programmable multi-rail systems | Choose when dynamic output adjustment or higher-frequency operation (to shrink inductor size further) is required. |
Compared with TPS61200DRCT and MAX17065ETA+T, the ISL9111AEH50Z-T7A provides a purpose-built, pin-compatible 5V solution with integrated FAULT signaling and optimized efficiency for non-rechargeable battery discharge profiles-reducing design validation effort for cost-sensitive portable HDMI/USB products.
Availability
ISL9111AEH50Z-T7A is available at Aetrix Electronics and suitable for USB-OTG adapters, wireless headsets, portable medical devices, and single-cell HDMI transmitters requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for ISL9111AEH50Z-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 acquired Intersil in 2017 and continues to manufacture and support its precision analog and power management portfolio.
The ISL9111A family was designed specifically for ultra-low-input-voltage battery-powered applications where maximizing usable cell energy-especially in non-rechargeable alkaline systems-is critical to product runtime and user experience.
FAQ
What is the minimum input voltage required for ISL9111AEH50Z-T7A to start switching?
The ISL9111AEH50Z-T7A has a typical start-up voltage of 0.6V under no-load conditions, as specified in the FN7602 datasheet Table on page 6. This allows reliable power-up from deeply discharged single-cell alkaline or NiMH batteries. Once started, it sustains operation down to 0.5V input, making ISL9111AEH50Z-T7A ideal for applications demanding maximum battery utilization without rechargeable cell protection circuitry.
Does ISL9111AEH50Z-T7A include undervoltage lockout (UVLO)?
No, ISL9111AEH50Z-T7A explicitly disables UVLO to maximize usable life of non-rechargeable batteries. Unlike the ISL9111 variant-which shuts down at 0.7V to protect rechargeable cells-the ISL9111A continues operating down to 0.5V after startup. This behavior is confirmed in the datasheet's "Minimum Startup and Minimum Operating Voltage" section (page 8) and Electrical Specifications table (page 6).
How does the FAULT pin on ISL9111AEH50Z-T7A behave during a short-circuit event?
During a short-circuit condition (VOUT < VIN), the FAULT pin on ISL9111AEH50Z-T7A is actively pulled low within 2ms of fault detection, as defined in Table 1 (page 10). The device immediately halts switching and automatically attempts recovery after a 200ms cooldown period. This FAULT signal enables host MCU-level diagnostics and safe system shutdown before thermal damage occurs.
Can ISL9111AEH50Z-T7A be used with a 4.7µH inductor and ceramic capacitors only?
Yes, ISL9111AEH50Z-T7A is fully characterized for use with a 4.7µH inductor and 4.7µF ceramic input/output capacitors, as shown in all typical application circuits (Figures 1, 3A–5A). The 1.2MHz switching frequency minimizes inductor size and eliminates need for electrolytic or tantalum capacitors-reducing footprint, cost, and failure risk in space-constrained portable designs.
What is the output voltage accuracy of ISL9111AEH50Z-T7A at 50mA load?
At VIN = 1.2V and ILOAD = 50mA, the ISL9111AEH50Z-T7A delivers 5.0V output with ±100mV accuracy (±2%) across –20°C to +85°C, per the Electrical Specifications table (page 6). This tight tolerance ensures compatibility with USB-OTG VBUS specifications (4.75–5.25V) without requiring post-regulation LDOs in most implementations.
ISL9111AEH50Z-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):
- 0.6V
- Voltage - Input (Max):
- 4.8V
- Voltage - Output (Min/Fixed):
- 5V
- 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
ISL9111AEH50Z-T7A FAQ
1.How can I place an order for ISL9111AEH50Z-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9111AEH50Z-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 ISL9111AEH50Z-T7A reliable?
The price and inventory of ISL9111AEH50Z-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9111AEH50Z-T7A is usually 5 days.
3.What payment methods are accepted for ISL9111AEH50Z-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9111AEH50Z-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9111AEH50Z-T7A?
ISL9111AEH50Z-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9111AEH50Z-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 ISL9111AEH50Z-T7A?
For technical support, including ISL9111AEH50Z-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9111AEH50Z-T7A requirements.
6.How does Aetrix verify that ISL9111AEH50Z-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9111AEH50Z-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 ISL9111AEH50Z-T7A meets industry standards.
7.What is the process for return or replacement of ISL9111AEH50Z-T7A?
All ISL9111AEH50Z-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9111AEH50Z-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 ISL9111AEH50Z-T7A part is unused and in its original packaging.
Return procedure for ISL9111AEH50Z-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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