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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Distribution Switches, Load Drivers

Diodes Incorporated AP2401B14KTR-E1

Name: AP2401B14KTR-E1
Brand: Diodes Incorporated
SKU: AP2401B14KTR-E1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AP2401B14KTR-E1

Manufacturer:: Diodes Incorporated

Category:: Power Distribution Switches, Load Drivers

Package:: SOT-23-6

Datasheet:: AP2401B14KTR-E1.pdf

Description:: IC PWR SWITCH P-CHAN 1:1 SOT23-6

Quantity:: RFQ Add To RFQ list

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Product details

Overview

AP2401B14KTR-E1 from BCD Semiconductor is a dual-channel CMOS low-dropout (LDO) voltage regulator IC with fixed 1.8V and 3.3V outputs, fabricated in CMOS process. It delivers up to 200mA per channel, features independent enable control (CE1/CE2), ±2% output voltage accuracy, 30µV_rms output noise (10Hz–100kHz), and operates across –40°C to +85°C. It powers dual-rail subsystems in portable battery-powered devices requiring stable, low-noise, low-quiescent-current regulation.

For engineers reviewing the AP2401B14KTR-E1 datasheet, AP2401B14KTR-E1 pinout, AP2401B14KTR-E1 application, or AP2401B14KTR-E1 equivalent, key selection criteria include per-channel enable logic, dropout voltage at 200mA load (≤500mV for 3.3V channel), PSRR of 70dB at 1kHz, compatibility with ceramic capacitors ≥1µF, and SOT-23-6 package thermal resistance (61.3°C/W).

Technical Context

The AP2401B14KTR-E1 integrates two independent LDO regulators sharing a common input (VIN) and ground (GND), each with dedicated error amplifier, voltage reference, and current-limit circuitry. Its CMOS architecture enables ultra-low quiescent current (25µA typical per channel) and sub-1µA standby current when CE pins are low.

Each channel features active-high enable control (CE1/CE2), no internal pull-down resistors, and operates with input voltages up to 6.5V. The device maintains high PSRR (70dB @ 1kHz) and low noise (30µV_rms) due to on-chip filtering and optimized error amplifier design, supporting noise-sensitive analog and RF circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltages	Channel 1: 1.8V fixed; Channel 2: 3.3V fixed - enables dual-rail power for core logic and I/O interfaces without external feedback resistors.
Max Output Current/Channel	200mA - supports moderate-power digital ICs (e.g., microcontrollers, sensors, interface transceivers) with headroom for transient loads.
Dropout Voltage	35–45mV @ 30mA (3.3V channel); ≤500mV @ 200mA - allows operation from single-cell Li-ion (3.0–4.2V) or 3.3V system rails with minimal headroom loss.
Output Voltage Accuracy	±2% - ensures reliable voltage margining for 1.8V logic (e.g., ARM Cortex-M peripherals) and 3.3V I/O (e.g., SPI, UART) without calibration.
PSRR	70dB @ 1kHz - suppresses switching noise from upstream DC-DC converters, critical for ADC reference stability and RF front-end biasing.
RMS Output Noise	30µV_rms (10Hz–100kHz) - meets low-noise requirements for precision analog signal chains and audio codec power domains.
Quiescent Current	25µA typical per channel - extends battery life in always-on sensor nodes and wearable devices with intermittent wake-up cycles.

Pinout & Package

SOT-23-6 package (2.95 × 2.82 × 1.45 mm), RoHS-compliant, lead-free (E1 suffix), with exposed pad not connected internally (optional GND connection for thermal enhancement).

Pin/Terminal	Circuit Role	Design Meaning
1 (CE1)	Enable input for Channel 1	Active-high logic: ≥1.3V enables 1.8V output; <0.25V disables with 0.1µA standby current - supports independent power gating of subsystems.
2 (VIN)	Input voltage supply	Common input for both regulators (6.5V max); requires 1µF ceramic input capacitor for stability and transient response.
3 (CE2)	Enable input for Channel 2	Active-high logic: ≥1.3V enables 3.3V output; decoupled control allows staggered startup or selective shutdown of I/O rails.
4 (VOUT2)	Output of Channel 2	Fixed 3.3V output (±2%), capable of 200mA; requires 1µF ceramic output capacitor for ESR-stable regulation.
5 (GND)	Ground reference	Common ground return for both channels and enable inputs; must be low-impedance to minimize noise coupling between outputs.
6 (VOUT1)	Output of Channel 1	Fixed 1.8V output (±2%), capable of 200mA; isolated from VOUT2 to prevent cross-talk during load transients (measured <20mV).

Key Features

Feature	Design Value
Dual independent enable control	CE1 and CE2 allow per-channel power sequencing - enables controlled boot-up of 1.8V core before 3.3V I/O, reducing inrush current and avoiding bus contention.
Ultra-low noise output	30µV_rms (10Hz–100kHz) - eliminates need for post-regulation LC filters in sensitive analog sections like microphone preamps or ADC references.
High PSRR at low frequency	70dB @ 1kHz - rejects ripple from buck converter switching frequencies (e.g., 500kHz fundamental harmonics down to 1kHz band), preserving signal integrity.
Ceramic capacitor compatible	Stable with ≥1µF X5R/X7R ceramics (ESR <100mΩ) - reduces board area and cost vs. tantalum or electrolytic alternatives.
Low dropout at full load	≤500mV @ 200mA (3.3V channel) - enables use with 3.6V nominal Li-ion batteries down to 3.3V cutoff, maximizing usable battery capacity.

Applications

Mobile Phone Baseband Power

Wireless Sensor Node Core Supply

Use Scenario: Powers ARM Cortex-M0+ MCU core (1.8V) and Bluetooth LE radio I/O (3.3V) from single Li-ion cell.

IC Role / Device Role / Timing Role: Dual-rail LDO providing regulated, low-noise, independently gated supplies for processor and RF subsystems.

Use Value: Enables simultaneous low-power sleep (both CE pins low, 0.2µA total) and fast wake-up (CE1 high first, then CE2) without external sequencing logic.

Use Scenario: Supplies 1.8V to ultra-low-power MCU and 3.3V to environmental sensor interface in battery-operated IoT node.

IC Role / Device Role / Timing Role: Dual-output regulator delivering stable rail voltages while minimizing quiescent consumption during 99% duty-cycle sleep mode.

Use Value: 25µA/channel quiescent current extends 10-year battery life in sealed industrial monitoring units using CR2032 coin cells.

Digital Camera Image Sensor Bias

Sub-board Telecom Power

Use Scenario: Provides clean 1.8V digital core and 3.3V analog bias for CMOS image sensor in compact action camera.

IC Role / Device Role / Timing Role: Low-noise dual LDO isolating digital switching noise from analog pixel readout circuitry.

Use Value: 30µV_rms noise prevents fixed-pattern noise in raw image data, eliminating post-processing correction overhead.

Use Scenario: Generates local 1.8V FPGA core and 3.3V transceiver rails on daughterboard within telecom base station equipment.

IC Role / Device Role / Timing Role: Compact dual LDO replacing discrete regulators to reduce footprint and improve thermal distribution on dense PCBs.

Use Value: SOT-23-6 package fits tight spacing constraints; 61.3°C/W θ_JC allows 200mA/channel operation without heatsink at 70°C ambient.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel LDO regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AP7312-1833D-TRG1	Successor part from same manufacturer; identical 1.8V/3.3V outputs, 200mA/channel, but improved PSRR (75dB @ 1kHz) and lower noise (25µV_rms).	Pin-compatible replacement with enhanced noise/PSRR performance; supports same SOT-23-6 footprint and enable logic.	Select AP7312 if new designs require extended lifecycle support and tighter noise specs; AP2401B14KTR-E1 remains viable for legacy cost-sensitive builds.
Torex XC6216D1833MR-G	1.8V/3.3V dual LDO, 200mA/channel, but uses active-low enable (CE#) and has higher quiescent current (45µA/channel).	Requires inverted enable logic and larger input capacitance (2.2µF) for stability; not drop-in compatible without schematic revision.	Choose only if Torex supply chain advantages outweigh redesign effort; verify CE# timing and input cap requirements against host controller GPIO behavior.

Compared with AP7312-1833D-TRG1, the AP2401B14KTR-E1 offers proven field reliability but slightly higher noise and lower PSRR; versus XC6216D1833MR-G, it provides simpler enable interface and lower quiescent current, though with less robust ESD rating (3kV HBM vs. 4kV).

Availability

AP2401B14KTR-E1 is available at Aetrix Electronics and suitable for mobile phone baseband power, wireless sensor node core supply, digital camera image sensor bias, and sub-board telecom power applications requiring stable component supply and long-term obsolescence management.

Supply support for AP2401B14KTR-E1 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

BCD Semiconductor Manufacturing Limited is a China-based fabless analog IC designer specializing in power management, LED drivers, and mixed-signal solutions for consumer, industrial, and communications markets.

The AP2401 series belongs to BCD's dual-channel CMOS LDO product line, engineered specifically for space-constrained, battery-powered applications demanding independent rail control, ultra-low quiescent current, and high noise immunity.

FAQ

What are the absolute maximum input voltage and operating temperature limits for AP2401B14KTR-E1?

The AP2401B14KTR-E1 has an absolute maximum input voltage of 6.5V and operates across –40°C to +85°C ambient temperature. Exceeding 6.5V risks permanent damage; junction temperature must remain below 150°C under load, with thermal resistance θ_JC = 61.3°C/W in SOT-23-6 package.

Can AP2401B14KTR-E1 drive 200mA continuously on both channels simultaneously?

Yes - the device supports combined output current up to 700mA (I_OUT1 + I_OUT2), well above 400mA total for dual 200mA loads. However, power dissipation must be managed: at 3.3V/200mA and 1.8V/200mA with 4.2V input, P_D ≈ 210mW, staying within the 250mW limit at 25°C ambient.

Is an external capacitor required on the CE pins for noise immunity?

No external capacitor is required on CE1 or CE2. These pins accept standard CMOS logic levels (V_IL ≤ 0.25V, V_IH ≥ 1.3V) and exhibit high noise immunity per datasheet test conditions. However, routing CE traces away from noisy switching nodes is recommended to prevent false toggling.

Does AP2401B14KTR-E1 require a minimum load current to maintain regulation?

No - the AP2401B14KTR-E1 regulates stably from zero load to full 200mA per channel. Its CMOS pass element and error amplifier design ensure output voltage accuracy (±2%) and PSRR performance even at I_OUT = 0mA, making it suitable for intermittent-load applications.

AP2401B14KTR-E1 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: SOT-23-6

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Switch Type:: USB Switch

Number of Outputs:: 1

Ratio - Input:Output:: 1:1

Output Configuration:: High Side

Output Type:: P-Channel

Interface:: On/Off

Voltage - Load:: 2.7V ~ 5.5V

Voltage - Supply (Vcc/Vdd):: Not Required

Current - Output (Max):: 2A

Rds On (Typ):: 70mOhm

Input Type:: Inverting

Features:: Load Discharge, Slew Rate Controlled, Status Flag

Fault Protection:: Current Limiting (Fixed), Over Temperature, Reverse Current, Short Circuit, UVLO

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-6

AP2401B14KTR-E1 FAQ

1.How can I place an order for AP2401B14KTR-E1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AP2401B14KTR-E1 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 AP2401B14KTR-E1 reliable?

The price and inventory of AP2401B14KTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP2401B14KTR-E1 is usually 5 days.

3.What payment methods are accepted for AP2401B14KTR-E1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP2401B14KTR-E1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AP2401B14KTR-E1?

AP2401B14KTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AP2401B14KTR-E1 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 AP2401B14KTR-E1?

For technical support, including AP2401B14KTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP2401B14KTR-E1 requirements.

6.How does Aetrix verify that AP2401B14KTR-E1 is sourced from the original manufacturer or authorized distributors?

All AP2401B14KTR-E1 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 AP2401B14KTR-E1 meets industry standards.

7.What is the process for return or replacement of AP2401B14KTR-E1?

All AP2401B14KTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AP2401B14KTR-E1, 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 AP2401B14KTR-E1 part is unused and in its original packaging.

Return procedure for AP2401B14KTR-E1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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