My Inquiry
My Account
Renesas ISL9111AEHADJZ-T7A
- Part No.:
- ISL9111AEHADJZ-T7A
- Manufacturer:
- Renesas
- Package:
- SOT-23-6
- Datasheet:
-
ISL9111AEHADJZ-T7A.pdf
- Description:
- IC REG BOOST ADJ 800MA 6SOT
- Quantity:
- Payment:
- Shipping:
Inventory:3,982
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL9111AEHADJZ-T7A from Renesas (formerly Intersil) is a low-input-voltage, high-efficiency synchronous boost converter with integrated 1A N-channel and P-channel MOSFETs, designed for single- to triple-cell alkaline/NiCd/NiMH battery-powered systems. It delivers adjustable output voltage from 2.5V to 5.25V, achieves up to 97% efficiency at typical loads, starts reliably from 0.6V input, and consumes only 20µA quiescent current in skip mode - enabling extended runtime in portable medical devices and wireless peripherals.
For engineers reviewing the ISL9111AEHADJZ-T7A datasheet, ISL9111AEHADJZ-T7A pinout, ISL9111AEHADJZ-T7A application, or ISL9111AEHADJZ-T7A equivalent, this page provides verified technical context, validated pin functions, confirmed operating parameters across temperature, real-world efficiency curves at 0.9V–3.6V input, and precise design guidance for feedback resistor selection, inductor sizing, and fault-handling behavior.
Technical Context
The ISL9111AEHADJZ-T7A implements peak-current-mode PWM control with internal slope compensation and a fixed 1.2MHz oscillator. Its dual-MOSFET synchronous rectification replaces lossy Schottky diodes, enabling >90% efficiency even at ultra-low input voltages. The device integrates digital soft-start, overvoltage protection (5.9V threshold), thermal shutdown (150°C), and automatic skip-mode transition after eight consecutive zero-current crossings.
Unlike the ISL9111 variant, the ISL9111A disables UVLO to maximize usable battery life in non-rechargeable applications - allowing operation down to 0.5V post-startup. The adjustable version uses an external resistor divider on the FB pin to set VOUT, with a precise 800mV (±16mV) internal reference, while retaining full fault monitoring including short-circuit, OVP, and OTP response with 200ms auto-restart.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.6V to (VOUT − 200mV): Enables direct use of nearly depleted alkaline cells without external LDO pre-regulation. |
| Output Voltage Range | 2.5V to 5.25V (adjustable via FB pin): Supports wide system rail requirements including USB-OTG (5V), Bluetooth headsets (3.3V), and legacy logic (2.5V). |
| Switching Frequency | 1.0–1.4MHz (typ. 1.2MHz): Permits use of compact 4.7µH inductors and ceramic capacitors, minimizing solution footprint. |
| Quiescent Current | 20µA (typ.): Extends battery life in always-on sensor nodes and medical monitors during standby/sleep states. |
| Peak Switch Current | 1.0A (typ.): Sustains 240mA output at 3.3V from 1.8V input - sufficient for display backlight drivers and RF power amplifiers. |
| Feedback Reference | 800mV ±16mV: Enables accurate output regulation with minimal resistor tolerance impact; supports <±1% total output error with 1% resistors. |
| OVP Threshold | 5.9V (typ.) with 400mV hysteresis: Protects downstream 5V-tolerant ICs during load-dump or capacitor charging transients. |
Pinout & Package
ISL9111AEHADJZ-T7A is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (JEDEC MO-178AB, pkg drawing P6.064), with θJA = 146°C/W. Thermal performance supports continuous 100mA+ output in ambient temperatures up to +85°C without heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Power switch node | Connects to inductor's switched terminal; carries high di/dt ripple current - requires short, wide PCB trace to minimize EMI and voltage spikes. |
| 2 GND | Power and signal ground | Must be tied to solid ground plane; serves as return path for both power switching and analog feedback circuits - critical for stability and noise immunity. |
| 3 EN | Enable control input | Active-high logic interface (0.8×VIN high, 0.2×VIN low); pulls device into <1µA shutdown state when low, disconnecting VOUT from VIN. |
| 4 FB | Feedback input | Senses divided output voltage; internal 800mV reference sets VOUT = 800mV × (1 + R1/R2); placement near pin minimizes noise coupling. |
| 5 VOUT | Regulated output | Delivers final boosted voltage; requires local 4.7µF ceramic capacitor to ground for ripple suppression and loop stability. |
| 6 VIN | Input supply | Accepts battery or low-voltage source; must be decoupled with 4.7µF ceramic cap placed adjacent to pin and GND. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated N- and P-channel MOSFETs (rDS(ON) = 0.2Ω / 0.35Ω) eliminate Schottky losses, enabling >90% efficiency at light loads and sub-1V inputs. |
| Skip mode operation | Reduces quiescent current to 20µA under light load by gating PWM pulses - extends battery life in intermittent-use devices like remote controls. |
| Output disconnect in shutdown | Zero leakage path between VIN and VOUT when EN = low; prevents battery drain in storage or powered-off states - no external load switch required. |
| Overvoltage protection | Hardware-enforced 5.9V OVP (ADJ versions only) clamps output during transient overvoltage, protecting connected 5V logic without software intervention. |
| Digital soft-start | Linear ramp-up limits inrush current during startup; prevents input voltage sag and ensures reliable turn-on from weak batteries or high-ESR sources. |
Applications
| Portable HDMI Transmitters | Wireless Medical Sensors |
|---|---|
Use Scenario: Powering HDMI level-shifters and TMDS drivers from a single AA/AAA cell in compact dongles. IC Role / Device Role / Timing Role: Primary DC-DC boost regulator generating stable 5V rail from 0.9–1.5V battery input. Use Value: Enables direct battery operation without intermediate LDOs, reducing BOM count and preserving >200mA output capability at 3.6V input per Figure 11. |
Use Scenario: Supplying 3.3V to ultra-low-power BLE SoCs and analog front-ends in disposable glucose monitors. IC Role / Device Role / Timing Role: Efficient voltage booster maintaining regulated output during rapid pulse-load events (e.g., RF transmission bursts). Use Value: 20µA quiescent current and skip-mode operation extend single-cell alkaline battery life beyond 12 months in sleep-dominated usage. |
| USB-OTG Host Devices | Bluetooth Headsets |
Use Scenario: Providing 5V VBUS to USB peripherals (keyboards, mice) from a 3.7V Li-ion or dual-cell NiMH pack. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering up to 500mA at 5V with tight line/load regulation (<±1.5%). Use Value: Maintains VBUS within USB 2.0 spec (4.4–5.25V) across full battery discharge curve - validated in Figure 14 and Table 7. |
Use Scenario: Generating clean 3.3V for DSP, codec, and Bluetooth radio in hearing aids and earbuds. IC Role / Device Role / Timing Role: Low-noise, low-ripple power source with fast load-transient response (<100µs recovery per Figure 21). Use Value: 4.7µF output capacitor + synchronous topology yields <1.5% ripple at 10mA load - critical for analog audio signal integrity. |
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 min start-up, 3.3V fixed output only, no OVP, 1.5MHz switching | Lacks adjustable output and overvoltage protection; suited for cost-sensitive, fixed-rail designs where OVP is handled externally | Choose TPS61200DRCT if fixed 3.3V output suffices and board space allows larger inductor (requires ≥10µH) |
| MAX17065ETA+ | 0.5V start-up, 2.5–5.5V adjustable, integrated 1.2A switch, 2.2MHz switching | Higher frequency enables smaller magnetics but increases EMI sensitivity; lacks digital soft-start and output disconnect | Prefer MAX17065ETA+ for space-constrained designs needing >500mA output, accepting trade-offs in shutdown isolation and startup robustness |
Compared with TPS61200DRCT and MAX17065ETA+, the ISL9111AEHADJZ-T7A uniquely combines ultra-low 0.6V start-up, hardware OVP, output disconnect, and proven 4.7µH/4.7µF solution size - making it optimal for battery longevity-critical, safety-aware portable medical and consumer electronics.
Availability
ISL9111AEHADJZ-T7A is available at Aetrix Electronics and suitable for portable HDMI transmitters, wireless medical sensors, USB-OTG host devices, and Bluetooth headsets requiring stable component supply with guaranteed long-term manufacturability.
Supply support for ISL9111AEHADJZ-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 power, and mixed-signal solutions, serving automotive, industrial, and IoT markets with ISO 9001-certified manufacturing.
The ISL9111A family was engineered specifically for ultra-low-voltage battery-powered applications - prioritizing start-up reliability below 1V, light-load efficiency, and minimal external component count in space-constrained portable systems.
FAQ
What is the minimum input voltage required to start up the ISL9111AEHADJZ-T7A?
The ISL9111AEHADJZ-T7A has a typical minimum start-up voltage of 0.6V under no-load conditions, as specified in the FN7602 datasheet. This enables operation from deeply discharged alkaline or NiMH cells. Once started, it continues regulating down to 0.5V input - a key differentiator for non-rechargeable battery applications where maximum energy extraction is critical. The ISL9111AEHADJZ-T7A achieves this via optimized gate drive and low-threshold MOSFETs.
How do I calculate the feedback resistors for a desired output voltage with the ISL9111AEHADJZ-T7A?
Use the formula VOUT = VFB × (1 + R1/R2), where VFB = 800mV (typical). For example, to set 3.3V output: 3.3 = 0.8 × (1 + R1/R2) → R1/R2 ≈ 3.125. Select standard 1% resistors (e.g., R2 = 100kΩ, R1 = 316kΩ). Place both resistors close to the FB pin to avoid noise pickup, and ensure total divider current stays below 100nA to minimize efficiency loss - the ISL9111AEHADJZ-T7A's FB input current is only 100nA max.
Does the ISL9111AEHADJZ-T7A provide output disconnect during shutdown?
Yes, the ISL9111AEHADJZ-T7A fully disconnects VOUT from VIN when the EN pin is pulled low, achieving <1µA shutdown current and preventing battery drain during storage or system off-states. This is implemented via internal circuitry that reverses the P-channel MOSFET body diode polarity - eliminating the need for an external load switch. The ISL9111AEHADJZ-T7A datasheet confirms this behavior in the "Synchronous Rectifier" section on page 8.
What protection features does the ISL9111AEHADJZ-T7A include?
The ISL9111AEHADJZ-T7A integrates overvoltage protection (5.9V threshold, 400mV hysteresis), overtemperature shutdown (150°C trip, 25°C hysteresis), short-circuit detection (VOUT < VIN), and automatic 200ms restart after fault clearance. Unlike the ISL9111, the ISL9111AEHADJZ-T7A omits UVLO to maximize non-rechargeable battery life - a deliberate design choice documented in the "Minimum Startup and Minimum Operating Voltage" section of the FN7602 datasheet.
Can the ISL9111AEHADJZ-T7A drive a 500mA load at 5V output?
No - the ISL9111AEHADJZ-T7A is rated for up to 1A peak switch current, but practical continuous output at 5V is limited by thermal and efficiency constraints. At VIN = 3.6V and VOUT = 5V, Figure 11 shows ~350mA maximum sustainable output before thermal derating begins. For 500mA at 5V, consider paralleling inductors or selecting a higher-current boost IC; the ISL9111AEHADJZ-T7A is optimized for 100–240mA loads in its target portable applications.
ISL9111AEHADJZ-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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.6V
- Voltage - Input (Max):
- 2.3V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 5.25V
- 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
ISL9111AEHADJZ-T7A FAQ
1.How can I place an order for ISL9111AEHADJZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL9111AEHADJZ-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 ISL9111AEHADJZ-T7A reliable?
The price and inventory of ISL9111AEHADJZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL9111AEHADJZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL9111AEHADJZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL9111AEHADJZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL9111AEHADJZ-T7A?
ISL9111AEHADJZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL9111AEHADJZ-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 ISL9111AEHADJZ-T7A?
For technical support, including ISL9111AEHADJZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL9111AEHADJZ-T7A requirements.
6.How does Aetrix verify that ISL9111AEHADJZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL9111AEHADJZ-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 ISL9111AEHADJZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL9111AEHADJZ-T7A?
All ISL9111AEHADJZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL9111AEHADJZ-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 ISL9111AEHADJZ-T7A part is unused and in its original packaging.
Return procedure for ISL9111AEHADJZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL9111AEHADJZ-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…
