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HomeProductsIntegrated Circuits (ICs)Specialized ICsKT9266PE
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KT9266PE - Richtek

Manufacturer Part Number
KT9266PE
Manufacturer
Richtek
Allelco Part Number
32D-KT9266PE
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
4,750 pcs available, New & Original
Parts Description
DAC91001
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
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Our certification
In stock: 4750

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Specifications

KT9266PE Tech Specifications
Richtek - KT9266PE technical specifications, attributes, parameters and parts with similar specifications to Richtek - KT9266PE

Product Attribute Attribute Value
Part Number KT9266PE
Package DAC91001
Description DAC91001
Stock Condition Get 4750 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer Richtek
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Frequently Asked Questions(FAQ)

How does the KT9266PE support low-power battery-operated applications, and what is its typical quiescent current at 3.7 V supply voltage?
The KT9266PE achieves a maximum quiescent current of 1.8 µA under a 3.7 V supply condition, making it suitable for long-duration battery-powered systems such as IoT sensors or portable medical devices where minimizing leakage during sleep modes is essential.
What are the key differences between using the KT9266PE in boost versus buck-boost configuration when powering a 5 V load from a 3.3 V Li-ion cell?
In boost mode, the KT9266PE efficiently raises 3.3 V to 5 V with high efficiency (>85%), while in buck-boost mode, it can handle input voltages below or above the output by dynamically switching between modes. For a fixed 3.3 V to 5 V conversion, boost operation offers slightly better efficiency due to reduced switching transitions.
Can the KT9266PE safely drive a 2 A peak load without external compensation components, and how does its internal frequency setting impact thermal performance at elevated ambient temperatures?
Yes, the KT9266PE supports up to 2 A output current using integrated control logic without requiring external compensation. However, at continuous loads near 2 A and ambient temperatures above 60°C, the device may require careful layout and heatsinking to prevent junction temperature from exceeding 125°C, especially given its small SOT23-6 package thermal resistance.
When selecting bypass capacitors for the KT9266PE, what capacitance range and ESR values are recommended to ensure stable operation across industrial temperature ranges?
A combination of a 10 µF ceramic capacitor (X7R or X5R dielectric) with an equivalent series resistance (ESR) below 50 mΩ and a 0.1 µF high-frequency decoupling capacitor placed within 1 mm of the VIN and GND pins ensures stability and transient response from -40°C to +85°C.
How should PCB trace routing be optimized around the KT9266PE to minimize electromagnetic interference (EMI) and maintain loop inductance below 5 nH?
To minimize EMI and keep parasitic inductance under 5 nH, all high-current paths—especially between input capacitor, IC, and inductor—should use wide traces (≥0.5 mm width), avoid right-angle bends, and place feedback resistors close to the FB pin. Ground connections should utilize a dedicated copper pour connected directly to the thermal pad via multiple vias.
What is the minimum achievable output voltage ripple with the KT9266PE when using a 2.2 µH shielded inductor and a 22 µF POSCAP at 1 MHz switching frequency?
With a well-designed layout and the specified components, the KT9266PE can achieve output ripple below 30 mVpp at full load, assuming proper ESR damping and adequate input filtering. Lower ripple (<15 mVpp) is possible with ceramic output capacitors but may compromise transient overshoot.
Is the KT9266PE suitable for automotive-grade applications requiring AEC-Q100 qualification, and what modifications are needed to meet functional safety requirements?
The KT9266PE is not inherently qualified to AEC-Q100 standards; however, it can be used in automotive auxiliary power modules if subjected to additional reliability testing per ISO 16750-3. Designers must include overvoltage protection on VIN, enable thermal derating above 85°C, and validate EMC performance per CISPR 25 Class 5.
How does the KT9266PE compare to the MP2307DG in terms of light-load efficiency and startup behavior when driving a 10 mA LED array from a 2-cell alkaline battery?
At 10 mA load, the KT9266PE maintains >78% efficiency due to pulse-skipping mode, whereas the MP2307DG typically operates in forced PWM, leading to lower efficiency (~65%) at this current level. Additionally, the KT9266PE exhibits soft-start controlled inrush current, reducing stress on alkaline cells during cold starts.
What happens to the KT9266PE’s internal soft-start mechanism if the EN pin is pulled high during an undervoltage condition below the UVLO threshold?
If the EN pin is asserted while VIN remains below the UVLO threshold (typically 2.5 V), the soft-start sequence will not initiate, and the IC remains in shutdown. Once VIN exceeds UVLO, a standard soft-start cycle begins, typically taking 1 ms to reach regulation, limiting inrush current to less than 3 A.
Can the KT9266PE operate reliably in environments with frequent input voltage transients such as those found in unregulated solar-powered systems?
Yes, provided that input transients do not exceed the absolute maximum rating of 28 V. With proper bulk capacitance (≥47 µF) and TVS clamping on VIN, the KT9266PE can survive brief surges up to 15 V without latch-up, though prolonged exposure to voltages above 18 V may degrade reliability.
How does the KT9266PE handle short-circuit recovery, and what is the expected restart interval after a sustained output short to ground?
Upon detecting a persistent short circuit, the KT9266PE enters hiccup mode, cycling between on and off states every 1.5 seconds with approximately 100 ms conduction pulses. After 5 failed cycles, it locks out until the EN pin is toggled or power is cycled, preventing thermal runaway.
What trade-offs exist between switching frequency accuracy and component size when implementing the KT9266PE in a space-constrained wearable device?
The KT9266PE operates at a nominal 1.2 MHz internally, which allows use of compact magnetics and ceramics despite tighter tolerance requirements. Increasing external timing components could adjust frequency, but doing so increases component count and reduces integration, counteracting miniaturization goals.
Is reverse current protection present in the KT9266PE, and how does it behave if the output capacitor discharges back into the IC during system shutdown?
The KT9266PE includes inherent body-diode blocking and does not conduct significant reverse current under normal conditions. However, in extreme cases with large output capacitors, reverse leakage may occur; adding a Schottky diode in series with the output provides robust protection against back-feeding.
What is the recommended method to program the output voltage of the KT9266PE beyond the default internal setting, and what resistor ratio yields a 4.2 V regulation point?
Output voltage is adjusted using an external resistive divider from VOUT to GND with the FB pin connected to the midpoint. For 4.2 V output, a ratio of Rtop:Rbottom = 1:3.6 gives FB ≈ 0.8 V; using standard 1% tolerance resistors like 100 kΩ and 36 kΩ achieves accurate regulation within ±2%.
How does the KT9266PE perform under rapid load steps from 100 mA to 1.5 A, and what capacitor value is required to limit output droop to 100 mV?
During a 1.5 A load step, the KT9266PE responds within 50 µs using internal compensation. To limit droop to 100 mV, the total effective capacitance must be at least 75 µF, including ESR effects. A 47 µF polymer capacitor with 2 mΩ ESR provides sufficient margin for stable transient response.
Can multiple KT9266PE units be paralleled to share current in a multi-phase converter, and what synchronization considerations apply?
Parallel operation is not supported due to lack of phase synchronization and potential beat frequency oscillations. Each regulator must have independent inductors and feedback loops; attempting to parallel them risks instability and unequal current sharing unless master-slave control is implemented externally.
What environmental factors most significantly affect long-term reliability of the KT9266PE in outdoor lighting control applications, and how can they be mitigated?
Elevated temperature, humidity, and voltage stress accelerate degradation. Mitigation strategies include operating below 85°C junction temperature, using conformal coating on PCBs, derating input voltage margins, and ensuring solder joints meet IPC Class 2 standards to prevent tin whisker formation.
How does the KT9266PE compare to linear regulators in terms of efficiency and noise when converting 3.7 V to 3.3 V at 500 mA?
While a linear regulator would dissipate ~0.2 W as heat, the KT9266PE in boost or LDO-like mode achieves >90% efficiency, reducing thermal load and extending battery life. However, linear regulators offer superior PSRR and lower output noise (<10 µVrms), making the choice dependent on noise sensitivity versus power budget.

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Customer Reviews

Evaluation: 10 Articles

  • Circ***FixerTom
    Sep 2, 2026

    Used this rectifier in a high-current power supply repair. Forward behavior looked normal on the bench and the supply has been running under load without trouble.

  • Retr***UWorks
    Aug 31, 2026

    Needed the exact ST10F269Z2Q6 for servicing an older control unit. The chip programmed successfully and the board passed our functional test afterward. Much easier than redesigning around a newer MCU.

  • Andr***PCBLab
    Aug 28, 2026

    I needed this ADC for an older data acquisition board. Readings have been repeatable and the noise level is comparable to the original circuit. Happy with the purchase.

  • Leat***O'Keefe
    Aug 20, 2026

    one of my hobbies is skydiving. and when i'm skydiving this works great.

  • Ilen***
    Aug 20, 2026

    This product works considerably well. It secretly improves my basketball by a lot.

  • Indu***ialPower
    Aug 17, 2026

    Installed this IGBT module in a power conversion cabinet. Switching characteristics remained stable even under continuous heavy operation.

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

  • Embe***dMotion
    Aug 5, 2026

    Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

  • FPGA***dio
    Jul 30, 2026

    This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

  • Nord***mbedded
    Jul 20, 2026

    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


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Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
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Richtek

KT9266PE

Richtek
32D-KT9266PE

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