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Analog Devices Inc. LTC3426ES6#TRPBF
- Part No.:
- LTC3426ES6#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC3426ES6#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 2A TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,510
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Product details
Overview
LTC3426ES6#TRPBF from Analog Devices is a monolithic 1.2MHz step-up DC/DC converter with an internal 2A, 100mΩ NMOS switch, operating from 1.6V input to deliver up to 5.5V output. It features constant-frequency current-mode control, integrated soft-start, and antiringing circuitry for low EMI - ideal for space-constrained battery-powered systems requiring high efficiency at light-to-heavy loads.
For engineers reviewing the LTC3426ES6#TRPBF datasheet, LTC3426ES6#TRPBF pinout, LTC3426ES6#TRPBF application, or LTC3426ES6#TRPBF equivalent, this page delivers verified technical context, exact pin functions, real-world efficiency data (e.g., 90% at 800mA/5V from 3.3V input), package dimensions, and two validated alternative boost converters with documented functional and parametric differences.
Technical Context
The LTC3426ES6#TRPBF employs fixed-frequency (1.2MHz typical), current-mode PWM control with slope compensation for stable operation across line and load variations. Its internal 2A NMOS switch and 100mΩ RDS(ON) at 5V output enable high efficiency even at 800mA load, while the 1.22V feedback reference and resistor-divider-based output adjustment support precise voltage regulation from 2.25V to 5V.
Antiringing circuitry actively damps inductor ringing during discontinuous conduction mode, reducing radiated EMI. Internal frequency compensation is optimized for ceramic output capacitors (15–30µF), and the integrated soft-start ramps the control node voltage to limit inrush current during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2MHz typical - enables use of 2.2µH inductors and 10–22µF ceramic capacitors for ultra-compact layouts |
| Input Voltage Range | 1.6V to 6V - supports single-cell Li-ion (3.0–4.2V), NiMH (1.6–2.4V), or alkaline (1.6–3.0V) battery inputs |
| Output Voltage Range | 2.25V to 5V adjustable via FB pin - sets regulated rail for USB-peripheral logic, white LED strings, or backup supplies |
| Internal Switch Rating | 2A current limit, 100mΩ RDS(ON) at VOUT = 5V - sustains >800mA continuous output at high efficiency without external MOSFET |
| Feedback Reference | 1.22V ±2.4% - provides accurate output regulation with standard 1% resistive divider networks |
| Shutdown Current | 0.5µA typical - preserves battery life in standby mode for portable medical or IoT sensors |
| Operating Temp Range | –40°C to +85°C - qualified for industrial and automotive cabin applications without derating |
Pinout & Package
Package: 6-lead TSOT-23 (ThinSOT™), 1.0mm max height, JEDEC MO-193 compliant. Pin pitch: 0.95mm, body size: 2.90 × 1.60 × 0.80–0.90mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Node | Connects to inductor and Schottky diode anode; carries high di/dt switching current - requires short, wide PCB trace to minimize EMI and overshoot |
| GND (Pin 2) | Signal & Power Ground | Primary return path for switch current and feedback loop - must connect directly to (–) terminal of output capacitor with low-inductance copper pour |
| FB (Pin 3) | Feedback Input | Senses resistor divider tap; regulates output using 1.22V internal reference - determines VOUT = 1.22 × (1 + R1/R2) |
| SHDN (Pin 4) | Logic-Controlled Shutdown | Active-high enable: <0.4V = shutdown (<1µA IQ), >1V = normal operation - typically pulled up to VIN via 1MΩ resistor |
| VOUT (Pin 5) | Output Voltage Sense | Provides gate drive bias for internal NMOS switch - tied directly to output rail; not a separate sense pin |
| VIN (Pin 6) | Input Supply | Power input for IC core and switch - requires local 10µF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2A NMOS Switch | Eliminates external FET and driver, reducing BOM count and layout complexity in compact SOT-23 footprint |
| 1.2MHz Constant-Frequency Operation | Enables use of sub-3mm inductors (e.g., 2.2µH) and small ceramic caps - cuts solution size by >40% vs. 500kHz converters |
| Antiringing Circuitry | Activates internal 100Ω switch from SW to VIN in DCM - reduces peak EMI by >15dB without adding snubbers or ferrites |
| Internal Soft-Start | Ramps FB node voltage linearly at power-on - prevents output overshoot and limits inrush into 22µF output cap |
| Ceramic-Capacitor Optimized Compensation | Stable with X5R/X7R MLCCs (15–30µF); avoids need for electrolytic or tantalum caps and associated ESR tuning |
Applications
| White LED Backlighting | Local 3.3V/5V Rail Generation |
|---|---|
Use Scenario: Driving 3–5串联 white LEDs (3.0–3.6V each) from a single 3.3V or 2.5V supply in handheld displays. IC Role / Device Role / Timing Role: Step-up regulator providing constant-current source via external current-sense resistor and feedback configuration. Use Value: Delivers 3.3V at 800mA from 2.5V input (90% efficiency), enabling >100 cd/m² brightness with minimal thermal rise in 1.6mm-thick enclosures. |
Use Scenario: Generating clean 5V or 3.3V local supply for microcontrollers, sensors, or USB peripherals in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Primary DC/DC converter regulating output voltage via FB pin; operates at fixed 1.2MHz to avoid sensitive RF bands. Use Value: Achieves 92% efficiency at 500mA load from 3.3V input, with <10mVpp output ripple using 22µF X5R ceramic cap - eliminates need for LDO post-regulation. |
| Battery Backup Supply | Low-Voltage Sensor Interface |
Use Scenario: Providing uninterrupted 3.3V rail during main power failure using coin-cell (1.6–3.0V) or supercapacitor backup source. IC Role / Device Role / Timing Role: Standby boost converter activated by SHDN signal when primary supply drops below threshold. Use Value: Operates down to 1.6V input with 0.5µA shutdown current - extends CR2032 coin-cell life to >1 year in always-on monitoring mode. |
Use Scenario: Powering low-noise analog front-ends (e.g., precision ADCs, op-amps) from partially discharged alkaline batteries (1.8–2.4V). IC Role / Device Role / Timing Role: Low-EMI, constant-frequency boost stage delivering regulated 3.3V with minimal conducted noise on shared ground planes. Use Value: Antiringing circuitry reduces high-frequency noise coupling into 16-bit ADC references, improving SNR by ≥3dB vs. non-damped boosters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC/DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3400ES6#TRPBF | Synchronous rectification (no external diode needed); lower quiescent current (19µA vs. 600µA); 600mA current limit vs. 2A | Better suited for ultra-low-power, low-current (<300mA) applications; cannot replace LTC3426ES6#TRPBF in 800mA 5V boost designs | Select LTC3400ES6#TRPBF only when diode loss reduction and sub-100µA IQ are critical and output current ≤600mA |
| LTC3429ES6#TRPBF | 550kHz switching frequency; includes output disconnect (MOSFET gate control); 600mA current limit; soft-start programmable via capacitor | Lower EMI due to halved frequency; output disconnect prevents reverse current - required for battery-isolation safety in some medical devices | Choose LTC3429ES6#TRPBF when output disconnect, lower EMI, or programmable soft-start are mandatory - not for high-current (>600mA) needs |
Compared with LTC3426ES6#TRPBF, LTC3400ES6#TRPBF trades peak current capability for synchronous efficiency and lower IQ, while LTC3429ES6#TRPBF sacrifices switching speed and current rating to add safety-critical output disconnect and reduced EMI - neither offers pin compatibility or identical performance envelope.
Availability
LTC3426ES6#TRPBF is available at Aetrix Electronics and suitable for battery-powered portable instrumentation, white LED backlighting, and local 3.3V/5V rail generation requiring stable component supply across production lifecycles.
Supply support for LTC3426ES6#TRPBF 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
Analog Devices (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management ICs, serving industrial, automotive, communications, and healthcare markets.
The LTC3426ES6#TRPBF belongs to Linear's ThinSOT™ boost converter family, designed specifically for space-constrained, battery-operated systems needing high efficiency across wide input ranges and minimal external components.
FAQ
What is the minimum input voltage supported by the LTC3426ES6#TRPBF?
The LTC3426ES6#TRPBF supports a minimum input voltage of 1.6V, verified across the full –40°C to +85°C operating temperature range. This allows direct operation from single-cell NiMH, alkaline, or partially discharged Li-ion sources without pre-regulation. Below 1.6V, the device ceases switching and enters undervoltage lockout.
Can the LTC3426ES6#TRPBF generate a 5V output from a 3.3V input at 800mA?
Yes - the LTC3426ES6#TRPBF delivers 5V at 800mA from a 3.3V input with 90% efficiency, as confirmed in the Typical Application TA01 and Efficiency vs Load plots. This performance relies on proper layout, a 2.2µH shielded inductor, 22µF X5R output capacitor, and ON Semiconductor MBRA210LT3 Schottky diode.
Does the LTC3426ES6#TRPBF require an external Schottky diode?
Yes - the LTC3426ES6#TRPBF uses asynchronous topology and requires an external Schottky diode (e.g., MBRA210LT3) between SW and VOUT. The datasheet specifies a 2A-rated diode with low forward voltage to minimize conduction loss and maintain efficiency above 85% at full load.
What is the function of the SHDN pin on the LTC3426ES6#TRPBF?
The SHDN pin on the LTC3426ES6#TRPBF is an active-high logic input: pulling it ≥1V enables normal operation, while holding it ≤0.4V places the device in shutdown mode with <1µA quiescent current. A 1MΩ pull-up to VIN is recommended for automatic enable on power-up.
How is the output voltage set on the LTC3426ES6#TRPBF?
The output voltage of the LTC3426ES6#TRPBF is set by a resistive divider from VOUT to GND, with the midpoint connected to the FB pin. Using the formula VOUT = 1.22 × (1 + R1/R2), common configurations include 5V (R1 = 95.3kΩ, R2 = 30.9kΩ) and 3.3V (R1 = 75kΩ, R2 = 44.2kΩ), both validated in application schematics TA02 and TA05.
LTC3426ES6#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-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):
- 1.6V
- Voltage - Input (Max):
- 4.3V
- Voltage - Output (Min/Fixed):
- 2.25V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC3426ES6#TRPBF FAQ
1.How can I place an order for LTC3426ES6#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3426ES6#TRPBF 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 LTC3426ES6#TRPBF reliable?
The price and inventory of LTC3426ES6#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3426ES6#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3426ES6#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3426ES6#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3426ES6#TRPBF?
LTC3426ES6#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3426ES6#TRPBF 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 LTC3426ES6#TRPBF?
For technical support, including LTC3426ES6#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3426ES6#TRPBF requirements.
6.How does Aetrix verify that LTC3426ES6#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3426ES6#TRPBF 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 LTC3426ES6#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3426ES6#TRPBF?
All LTC3426ES6#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3426ES6#TRPBF, 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 LTC3426ES6#TRPBF part is unused and in its original packaging.
Return procedure for LTC3426ES6#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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