My Inquiry
My Account
Renesas ISL9111AEH33Z-T7A
- Part No.:
- ISL9111AEH33Z-T7A
- Manufacturer:
- Renesas
- Package:
- SOT-23-6
- Datasheet:
-
ISL9111AEH33Z-T7A.pdf
- Description:
- IC REG BOOST 3.3V 800MA 6SOT
- Quantity:
- Payment:
- Shipping:
Inventory:2,630
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL9111AEH33Z-T7A from Renesas (formerly Intersil) is a low-input-voltage, high-efficiency synchronous boost converter optimized for single-cell alkaline/NiMH battery-powered systems. It delivers up to 3.3V at 240mA from 1.8V input, features 0.6V minimum start-up voltage, 1.2MHz switching frequency, and integrated N/P-channel MOSFETs with 0.2Ω/0.35Ω rDS(ON). It powers portable USB-OTG and Bluetooth headsets requiring ultra-low-voltage operation.
For engineers reviewing the ISL9111AEH33Z-T7A datasheet, ISL9111AEH33Z-T7A pinout, ISL9111AEH33Z-T7A application, or ISL9111AEH33Z-T7A equivalent, key selection criteria include minimum operating voltage (0.5V), quiescent current (20µA), fault reporting via FAULT pin, and fixed 3.3V output without external feedback components.
Technical Context
The ISL9111AEH33Z-T7A implements peak-current-mode PWM control with internal slope compensation and a 1.2MHz oscillator. Its synchronous rectification replaces Schottky diodes with integrated N- and P-channel MOSFETs, enabling >90% efficiency and output disconnect during shutdown.
It operates in two modes: continuous PWM above light load thresholds and skip mode below - reducing quiescent current to 20µA while maintaining regulation. UVLO is disabled (vs. ISL9111), allowing operation down to 0.5V to maximize non-rechargeable battery life.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±100mV - eliminates need for external feedback resistors and simplifies BOM. |
| Min Start-up Voltage | 0.6V typical - enables operation from deeply discharged single-cell alkaline batteries. |
| Min Operating Voltage | 0.5V after start-up - extends usable battery life in non-rechargeable applications. |
| Switching Frequency | 1.2MHz (1.0–1.4MHz range) - permits use of compact 4.7µH inductors and ceramic capacitors. |
| Quiescent Current | 20µA typical - minimizes standby power loss and maximizes battery runtime in sleep states. |
| Peak Switch Current | 1.0A typical - supports up to 240mA output at 3.3V from 1.8V input under defined conditions. |
| Fault Reporting | Active-low FAULT pin - signals OVP (not applicable), OTP, short-circuit, or undervoltage events. |
Pinout & Package
ISL9111AEH33Z-T7A is housed in a Pb-free 6-lead SOT-23 package (JEDEC MO-178AB, pkg drawing P6.064), with 146°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switching node | Connects to inductor; carries high dI/dt switching current - requires short, wide PCB trace. |
| 2 GND | Power ground | Primary return path for input/output currents; must connect to solid ground plane. |
| 3 EN | Enable input | Active-high logic control; <0.2×VIN = disable, >0.8×VIN = enable; draws <1µA in shutdown. |
| 4 FAULT | Fault indicator | Open-drain output pulled low during OTP, short-circuit, or VOUT regulation failure. |
| 5 VOUT | Regulated output | Delivers fixed 3.3V; requires 4.7µF ceramic capacitor placed adjacent to pin and GND. |
| 6 VIN | Input supply | Accepts 0.5–3.1V input; requires 4.7µF ceramic capacitor connected directly to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Output disconnect during shutdown | Prevents battery drain by blocking conduction path between VIN and VOUT when EN = low. |
| Skip mode at light load | Reduces average quiescent current to 20µA while maintaining regulation - critical for intermittent-use devices. |
| Integrated synchronous rectifier | N- and P-channel MOSFETs replace Schottky diode, eliminating forward voltage drop and boosting efficiency >90%. |
| Digital soft-start | Linear ramp limits inrush current during startup; prevents input voltage sag and output overshoot. |
| Thermal shutdown with hysteresis | Shuts down at 150°C; restarts at ~125°C - protects against sustained overload or poor heatsinking. |
Applications
| Portable USB-OTG Power Supply | Bluetooth Headset Power Management |
|---|---|
Use Scenario: Powers USB-OTG peripherals (e.g., flash drives, keyboards) from single AA/AAA cells in handheld accessories. IC Role / Device Role / Timing Role: Primary DC-DC boost regulator delivering stable 3.3V rail from 0.9–1.8V battery input. Use Value: Enables USB-OTG compliance with minimal bill-of-materials and no external feedback network. |
Use Scenario: Supplies regulated 3.3V to Bluetooth radio ICs and audio codecs in compact wireless headsets. IC Role / Device Role / Timing Role: High-efficiency power source supporting burst-mode RF transmission and low-power sleep states. Use Value: Extends talk time by sustaining operation down to 0.5V battery voltage and consuming only 20µA in idle. |
| Wireless Keyboard/Mouse | Personal Medical Devices |
Use Scenario: Powers microcontroller and RF transceiver in energy-constrained human-interface devices. IC Role / Device Role / Timing Role: Always-on boost converter with fast transient response to support wake-on-keypress events. Use Value: Delivers 240mA peak current at 3.3V from dual-cell NiMH while maintaining >90% efficiency across load range. |
Use Scenario: Provides clean, regulated 3.3V for sensors, displays, and low-power MCUs in glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Primary power stage ensuring reliable operation across full battery discharge curve. Use Value: Fault reporting (FAULT pin) enables system-level battery health monitoring and safe shutdown before deep discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610992DRCR | 0.7V start-up, 3.3V fixed output, 1.2MHz, but lacks FAULT pin and output disconnect. | Requires external circuitry for fault monitoring and battery isolation in safety-critical designs. | Choose when FAULT signaling and VIN-VOUT isolation are not required and footprint compatibility is prioritized. |
| MAX17222ATA+T | 0.4V start-up, 3.3V fixed output, 1.2MHz, includes FAULT pin but no UVLO disable option. | UVLO active at 0.6V may prematurely shut down non-rechargeable cells before full depletion. | Prefer for ultra-low-voltage rechargeable systems where deeper discharge protection is needed. |
Compared with TPS610992DRCR and MAX17222ATA+T, the ISL9111AEH33Z-T7A uniquely combines 0.5V operating voltage, FAULT reporting, and true output disconnect - making it optimal for non-rechargeable, fault-aware portable medical and HID applications.
Availability
ISL9111AEH33Z-T7A is available at Aetrix Electronics and suitable for portable USB-OTG accessories, Bluetooth headsets, and wireless human-interface devices requiring stable component supply and long-term lifecycle support.
Supply support for ISL9111AEH33Z-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) is a global leader in microcontrollers, analog, and power management ICs, serving industrial, automotive, and consumer markets with high-reliability solutions.
The ISL9111A family was designed specifically for ultra-low-voltage, battery-powered portable electronics - emphasizing minimal start-up voltage, high light-load efficiency, and robust fault handling in space-constrained SOT-23 packages.
FAQ
What is the minimum input voltage required for ISL9111AEH33Z-T7A to start up?
The ISL9111AEH33Z-T7A has a typical minimum start-up voltage of 0.6V under no-load conditions, enabling operation from nearly depleted single-cell alkaline or NiMH batteries. This value is confirmed in the Electrical Specifications table on page 6 of FN7602 Rev.4.00, and distinguishes the ISL9111A variant from the UVLO-enabled ISL9111.
Does ISL9111AEH33Z-T7A require external feedback resistors to set its output voltage?
No, the ISL9111AEH33Z-T7A provides a factory-trimmed fixed 3.3V output. Its internal voltage divider eliminates the need for external FB resistors - simplifying layout, reducing component count, and improving accuracy over temperature versus adjustable alternatives like ISL9111AEHADJZ-T7A.
How does the FAULT pin on ISL9111AEH33Z-T7A behave during over-temperature events?
When die temperature exceeds 150°C, the ISL9111AEH33Z-T7A asserts the FAULT pin low and halts switching. The pin remains low until temperature drops to ~125°C (25°C hysteresis), at which point normal operation resumes automatically - no external reset is required. This behavior is documented in Table 1 on page 10 of FN7602.
Can ISL9111AEH33Z-T7A safely drive a 240mA load at 3.3V from a 1.8V input?
Yes - the datasheet guarantees 240mA output at 3.3V when VIN = 1.8V (page 1). This performance is enabled by the integrated 0.2Ω N-MOSFET and 0.35Ω P-MOSFET, low quiescent current, and 1.2MHz switching frequency that minimizes inductor size and losses.
What happens to the power path between VIN and VOUT when ISL9111AEH33Z-T7A is disabled via the EN pin?
When EN is driven low, the ISL9111AEH33Z-T7A fully disconnects VIN from VOUT using an internal reverse-polarity circuit that blocks conduction through the P-MOSFET body diode. This prevents battery drain during shutdown - a key feature confirmed in the "Synchronous Rectifier" section on page 8 of FN7602.
ISL9111AEH33Z-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):
- 3.1V
- Voltage - Output (Min/Fixed):
- 3.3V
- 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
ISL9111AEH33Z-T7A FAQ
1.How can I place an order for ISL9111AEH33Z-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9111AEH33Z-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 ISL9111AEH33Z-T7A reliable?
The price and inventory of ISL9111AEH33Z-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9111AEH33Z-T7A is usually 5 days.
3.What payment methods are accepted for ISL9111AEH33Z-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9111AEH33Z-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9111AEH33Z-T7A?
ISL9111AEH33Z-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9111AEH33Z-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 ISL9111AEH33Z-T7A?
For technical support, including ISL9111AEH33Z-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9111AEH33Z-T7A requirements.
6.How does Aetrix verify that ISL9111AEH33Z-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9111AEH33Z-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 ISL9111AEH33Z-T7A meets industry standards.
7.What is the process for return or replacement of ISL9111AEH33Z-T7A?
All ISL9111AEH33Z-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9111AEH33Z-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 ISL9111AEH33Z-T7A part is unused and in its original packaging.
Return procedure for ISL9111AEH33Z-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL9111AEH33Z-T7A Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
