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Renesas ISL9111EH50Z-T
- Part No.:
- ISL9111EH50Z-T
- Manufacturer:
- Renesas
- Package:
- SOT-23-6
- Datasheet:
-
ISL9111EH50Z-T.pdf
- Description:
- IC REG BOOST 5V 800MA 6SOT
- Quantity:
- Payment:
- Shipping:
Inventory:4,730
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Product details
Overview
ISL9111EH50Z-T from Intersil is a low-input-voltage, high-efficiency synchronous boost converter with integrated 1A N- and P-channel MOSFETs, delivering fixed 5.0V output from single/dual-cell alkaline/NiMH batteries. It starts up at 0.8V, operates down to 0.7V, achieves up to 97% efficiency at 3.3V output, and supports 240mA load at VIN = 1.8V - ideal for USB-OTG and portable HDMI power rails.
For engineers reviewing the ISL9111EH50Z-T datasheet, ISL9111EH50Z-T pinout, ISL9111EH50Z-T application, or ISL9111EH50Z-T equivalent, key selection factors include minimum startup voltage (0.8V), UVLO protection (0.7V shutdown), FAULT pin monitoring, 1.2MHz switching frequency for compact magnetics, and SOT-23-6 package compatibility with space-constrained battery-powered designs.
Technical Context
The ISL9111EH50Z-T implements peak current-mode PWM control with internal compensation and a 1.2MHz oscillator, enabling stable regulation across input voltages from 0.8V to VOUT − 200mV. Its synchronous rectification replaces Schottky diodes with low-rDS(ON) MOSFETs (0.2Ω N-ch, 0.35Ω P-ch), minimizing conduction loss.
Skip mode activates after eight consecutive zero-current crossings, reducing quiescent current to 20µA at light loads while maintaining regulated output. Output disconnect during shutdown prevents battery drain, and digital soft-start limits inrush current with linear ramping to 90% of VIN before PWM engagement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±100mV - ensures stable USB-OTG and HDMI interface supply without external feedback resistors. |
| Startup Voltage | 0.8V typical - enables operation from deeply discharged single-cell alkaline or NiMH batteries. |
| UVLO Threshold | 0.7V - protects rechargeable cells from over-discharge by disabling output below safe voltage. |
| Switching Frequency | 1.2MHz ±0.2MHz - allows use of 4.7µH inductors and ceramic capacitors for minimal PCB footprint. |
| Peak Switch Current | 1.0A typical - supports ≥240mA output at VIN = 1.8V and VOUT = 3.3V, scaled for 5V output under typical loads. |
| Quiescent Current | 20µA typical - extends battery life in standby or low-power sensor modes. |
| Package | 6-lead SOT-23 - surface-mount compatible with automated assembly and thermal resistance θJA = 146°C/W. |
Pinout & Package
ISL9111EH50Z-T is housed in a Pb-free 6-lead SOT-23 package (JEDEC MO-178AB, pkg drawing P6.064), optimized for thermal performance and board-level reliability in portable applications.
| 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 input/output capacitors and MOSFET sources - must connect to solid ground plane. |
| 3 EN | Enable control | Active-high logic input; pulls device into shutdown with <1µA leakage when low, blocking all power transfer. |
| 4 FAULT | Fault reporting | Open-drain output pulled low during UVLO, short circuit, OTP, or output regulation failure - enables system-level fault detection. |
| 5 VOUT | Regulated output | Delivers fixed 5.0V to load; includes output disconnect during shutdown to prevent battery leakage. |
| 6 VIN | Input supply | Accepts 0.8–4.8V input; requires local 4.7µF ceramic capacitor to suppress ripple and support peak switch current. |
Key Features
| Feature | Design Value |
|---|---|
| Internal UVLO | 0.7V threshold prevents over-discharge of rechargeable alkaline/NiMH cells, extending usable battery capacity. |
| Synchronous rectification | Integrated N- and P-channel MOSFETs replace Schottky diode, achieving >90% efficiency and eliminating forward voltage drop losses. |
| Output disconnect | Active isolation between VIN and VOUT during shutdown eliminates battery drain - no external load switch required. |
| Skip mode operation | Reduces quiescent current to 20µA at light loads while maintaining regulation, improving partial-load efficiency and runtime. |
| Digital soft-start | Linear pre-charge phase limits inrush current and avoids output overshoot during power-up sequences. |
Applications
| USB-OTG Power Supply | Portable HDMI Interface |
|---|---|
Use Scenario: Powers USB On-The-Go host functionality in handheld medical devices or wireless peripherals using single-cell batteries. IC Role / Device Role / Timing Role: Boost converter providing stable 5.0V rail compliant with USB 2.0 specification from sub-1.2V inputs. Use Value: Enables OTG capability without external LDO or charge pump - reduces BOM count and supports deep battery discharge down to 0.8V. | Use Scenario: Supplies regulated 5V to HDMI transmitter ICs in compact portable media players or camera adapters. IC Role / Device Role / Timing Role: Primary DC-DC stage converting low-voltage battery output to HDMI sink-compatible 5V bus power. Use Value: Delivers 240mA at 1.8V input, meeting HDMI Type-C power requirements while maintaining >90% efficiency and minimal thermal rise. |
| Wireless Keyboard/Mouse | Bluetooth Headset |
Use Scenario: Powers RF transceivers and microcontrollers in ultra-low-power human interface devices. IC Role / Device Role / Timing Role: Efficient step-up regulator supporting intermittent high-current bursts (e.g., BLE advertising) from aging alkaline cells. Use Value: Skip mode maintains 20µA quiescent draw during sleep, extending shelf life; FAULT pin alerts MCU of battery depletion. | Use Scenario: Supplies clean 5V to audio codec and Bluetooth SoC in compact ear-worn headsets. IC Role / Device Role / Timing Role: Compact, low-noise boost source with output disconnect preventing battery drain during storage. Use Value: SOT-23-6 footprint fits tight form factors; 1.2MHz switching avoids audible noise in sensitive audio bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCT | 0.3V startup, no UVLO, adjustable output only - requires external resistors; 1.2A switch current. | Lacks fixed 5V option and FAULT pin; better suited for non-rechargeable systems needing deeper discharge. | Select when minimum input voltage <0.8V is critical and UVLO is not required. |
| MAX17065ETA+ | 0.7V startup, fixed 5V output, but uses 8-pin µDFN; includes I²C programmability and telemetry. | Higher integration adds complexity; larger footprint and cost - targets industrial-grade telemetry needs. | Select when digital monitoring, programmable OVP, or tighter output accuracy (±1%) is required. |
Compared with TPS61200DRCT and MAX17065ETA+, the ISL9111EH50Z-T offers optimal balance of ultra-low startup voltage, integrated UVLO, fixed 5V output, FAULT reporting, and minimal 6-pin SOT-23 footprint - making it ideal for cost-sensitive, space-constrained consumer portable designs.
Availability
ISL9111EH50Z-T is available at Aetrix Electronics and suitable for USB-OTG power supplies, portable HDMI interfaces, and wireless peripheral designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL9111EH50Z-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 battery-powered applications - delivering high efficiency, minimal external components, and robust protection features in miniature packages.
FAQ
What is the minimum input voltage required for ISL9111EH50Z-T to start up?
The ISL9111EH50Z-T has a typical startup voltage of 0.8V, verified per datasheet FN7602 Rev.4.00. This allows reliable operation from nearly depleted single-cell alkaline or NiMH batteries. The device remains functional down to 0.7V input before UVLO triggers shutdown - protecting rechargeable cells from over-discharge. Startup behavior is confirmed across temperature (−20°C to +85°C) and load conditions.
Does ISL9111EH50Z-T include output disconnect during shutdown?
Yes, the ISL9111EH50Z-T provides active output disconnect during shutdown: when the EN pin is driven low, both internal MOSFETs turn off and the body diode polarity is reversed, fully isolating VIN from VOUT. This prevents battery drain during storage or standby - a confirmed feature documented in the "Synchronous Rectifier" section of FN7602, page 8. No external load switch is needed.
What protection features does ISL9111EH50Z-T offer?
The ISL9111EH50Z-T integrates UVLO (0.7V shutdown), thermal shutdown (150°C trip, 25°C hysteresis), short-circuit protection, and output regulation fault detection. All faults assert the open-drain FAULT pin low, as specified in Table 1 (page 10 of FN7602). Unlike the ADJ versions, ISL9111EH50Z-T does not include OVP - that feature is exclusive to adjustable-output variants.
Can ISL9111EH50Z-T be used with a 3.3V output instead of 5.0V?
No - ISL9111EH50Z-T is a fixed 5.0V output version. Its internal voltage divider sets VOUT precisely to 5.0V ±100mV. For 3.3V output, use ISL9111EH33Z-T (same package, same specs except output voltage). The part marking "GAMA" on the device bottom confirms the 5.0V variant, per Ordering Information table (page 5 of FN7602).
What is the maximum continuous output current for ISL9111EH50Z-T at 5.0V output?
While the datasheet specifies 240mA at VOUT = 3.3V and VIN = 1.8V, the ISL9111EH50Z-T's 1.0A peak switch current and thermal limits (θJA = 146°C/W, TJ(max) = 125°C) support ~150mA continuous at 5.0V output under typical PCB layout and ambient conditions. Derating is required above 60°C ambient; full 240mA is not sustainable at 5V due to higher duty cycle and power dissipation.
ISL9111EH50Z-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):
- 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
ISL9111EH50Z-T FAQ
1.How can I place an order for ISL9111EH50Z-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9111EH50Z-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 ISL9111EH50Z-T reliable?
The price and inventory of ISL9111EH50Z-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9111EH50Z-T is usually 5 days.
3.What payment methods are accepted for ISL9111EH50Z-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9111EH50Z-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9111EH50Z-T?
ISL9111EH50Z-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9111EH50Z-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 ISL9111EH50Z-T?
For technical support, including ISL9111EH50Z-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9111EH50Z-T requirements.
6.How does Aetrix verify that ISL9111EH50Z-T is sourced from the original manufacturer or authorized distributors?
All ISL9111EH50Z-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 ISL9111EH50Z-T meets industry standards.
7.What is the process for return or replacement of ISL9111EH50Z-T?
All ISL9111EH50Z-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL9111EH50Z-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 ISL9111EH50Z-T part is unused and in its original packaging.
Return procedure for ISL9111EH50Z-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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