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Analog Devices Inc. LTC3426ES6#TRMPBF
- Part No.:
- LTC3426ES6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC3426ES6#TRMPBF.pdf
- Description:
- IC REG BOOST ADJ 2A TSOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LTC3426ES6#TRMPBF from Analog Devices is a monolithic 1.2MHz step-up DC/DC converter in a 6-lead TSOT-23 package, featuring an internal 2A/100mΩ NMOS switch, 1.6V minimum input voltage, and adjustable output from 2.25V to 5.5V. It delivers 5V at 800mA from a 3.3V input and is optimized for space-constrained battery-powered systems requiring high efficiency and low EMI.
For engineers reviewing the LTC3426ES6#TRMPBF datasheet, LTC3426ES6#TRMPBF pinout, LTC3426ES6#TRMPBF application, or LTC3426ES6#TRMPBF equivalent, key selection criteria include its 1.2MHz fixed-frequency current-mode control, integrated soft-start, antiringing circuitry, and compatibility with ceramic output capacitors for low-noise local 3.3V/5V supply generation.
Technical Context
The LTC3426ES6#TRMPBF employs constant-frequency, current-mode PWM control with internal slope compensation to ensure stable regulation across line and load variations. Its feedback loop compares the FB pin voltage (1.22V nominal reference) against a resistor-divider–set output, adjusting peak inductor current to maintain regulation.
Operation includes internal 100Ω antiringing switch activation during discontinuous conduction mode to suppress inductor ringing, and a dedicated SHDN pin enabling <1µA shutdown current. The device derives gate drive from the greater of VIN or VOUT, supporting efficient low-input-voltage 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 compact, low-profile designs |
| 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 5.5V - adjustable via external resistor divider; 5V @ 800mA from 3.3V input confirmed |
| Internal Switch | 2A rated, 100mΩ RDS(ON) at 5V output - sustains >85% efficiency at 800mA load with minimal thermal rise |
| Feedback Reference | 1.22V ±2.4% - sets output accuracy; allows precise 3.3V or 5V regulation using standard 1% resistors |
| Shutdown Current | 0.5µA typical - preserves battery life in standby; SHDN pin logic-controlled with 1V high / 0.4V low thresholds |
| Quiescent Current | 600–1000µA - low operating bias enables high light-load efficiency in portable applications |
Pinout & Package
The LTC3426ES6#TRMPBF is housed in a 6-lead ThinSOT™ (TSOT-23) package, 1.90mm × 2.90mm × 0.80–0.90mm height, with exposed pad not electrically connected. Pin 1 (SW) carries high di/dt switching node; GND (Pin 2) serves as both signal and power return; FB (Pin 3) is high-impedance error amplifier input; SHDN (Pin 4) controls enable/disable; VOUT (Pin 5) senses output for gate drive reference; VIN (Pin 6) supplies input power.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Node | Connects to inductor and Schottky diode anode; internal 2A NMOS drain; requires short/wide PCB traces to minimize EMI and voltage overshoot |
| GND (Pin 2) | Signal & Power Ground | Primary return path for switch current and feedback network; must connect directly to (–) terminal of output capacitor |
| FB (Pin 3) | Feedback Input | High-impedance input to gm error amplifier; sets output voltage via resistor divider; 0.1µA max input bias ensures accuracy with high-value resistors |
| SHDN (Pin 4) | Enable Control | Active-high logic input; pulls internal regulator into <1µA shutdown state when low; 1MΩ pull-up to VIN recommended |
| VOUT (Pin 5) | Output Sense / Gate Drive Reference | Senses regulated output and provides reference for NMOS gate drive; derived from greater of VIN or VOUT to ensure startup from low input |
| VIN (Pin 6) | Input Supply | Power input for internal circuitry and switch source; requires local 10µF ceramic bypass capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Soft-Start | Ramps FB node voltage from 0V at power-up to prevent inrush current and output overshoot during startup |
| Antiringing Circuitry | Activates internal 100Ω switch from SW to VIN in discontinuous mode, reducing inductor ringing and system EMI |
| Ceramic Capacitor Optimized | Internally compensated for stable operation with low-ESR ceramic output caps (15–30µF), eliminating need for electrolytic or tantalum |
| Low 1.6V Input Operation | Enables direct regulation from single-cell batteries down to end-of-life voltage without pre-regulation |
| Constant-Frequency Current Mode | Delivers predictable noise spectrum centered at 1.2MHz, simplifying EMI filtering and improving transient response |
Applications
| White LED Driver Supply | Local 3.3V or 5V Supply |
|---|---|
Use Scenario: Powering 3–5 white LEDs in portable medical devices or handheld instrumentation where battery voltage drops below forward voltage requirement. IC Role / Device Role / Timing Role: Step-up converter generating regulated 5V rail from declining 1.8–3.3V battery input; operates in continuous conduction mode up to 800mA. Use Value: Delivers consistent LED brightness over full battery discharge curve while maintaining >85% efficiency and low output ripple. | Use Scenario: Generating clean, locally regulated 3.3V or 5V for microcontrollers, sensors, or RF transceivers on compact PCBs with limited board area. IC Role / Device Role / Timing Role: Primary DC/DC regulator providing stable output from single-cell Li-ion or dual-cell alkaline sources; uses 1.2MHz switching to shrink passive size. Use Value: Enables use of 2.2µH inductors and 10–22µF X5R/X7R ceramics, reducing solution footprint by >40% vs. lower-frequency alternatives. |
| Battery Back-Up | Low-Power Sensor Node Supply |
Use Scenario: Maintaining real-time clock (RTC) or SRAM backup power during main supply failure in industrial controllers or smart meters. IC Role / Device Role / Timing Role: Always-on boost converter sourcing 3.3V at ≤100µA from coin cell or supercapacitor; leverages 0.5µA shutdown current and 600µA quiescent draw. Use Value: Extends backup runtime by minimizing static power loss while retaining fast wake-up capability via SHDN control. | Use Scenario: Powering intermittent-duty environmental sensors (e.g., temperature/humidity) in wireless IoT nodes powered by primary alkaline cells. IC Role / Device Role / Timing Role: Efficient energy harvester interface that boosts 1.6–2.5V battery output to 3.3V only during active measurement cycles. Use Value: Achieves >80% efficiency at 10–100mA loads and <1µA shutdown leakage, maximizing usable battery capacity over multi-year deployments. |
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#TRMPBF | Synchronous rectification (no external diode required); 600mA max output; 1.2MHz; 0.5V min VIN | Better light-load efficiency but lower output current; requires no Schottky diode, reducing BOM count | Select when diode elimination and sub-1V startup are critical; avoid if ≥800mA 5V output is required |
| LTC3429ES6#TRMPBF | 550kHz switching; integrated soft-start and output disconnect; 600mA max output; 0.5V min VIN | Lower EMI due to reduced frequency; output disconnect prevents backfeed; less efficient at high load | Select for ultra-low EMI or backfeed-sensitive systems; avoid when 1.2MHz size advantage or 800mA output is needed |
Compared with LTC3426ES6#TRMPBF, LTC3400ES6#TRMPBF trades output current for synchronous efficiency and lower VIN capability, while LTC3429ES6#TRMPBF sacrifices switching speed and current rating for EMI reduction and output isolation-neither matches the original's 800mA/1.2MHz/1.6V combination.
Availability
LTC3426ES6#TRMPBF is available at Aetrix Electronics and suitable for battery-powered portable instrumentation, white LED lighting, RTC backup systems, and low-power sensor nodes requiring stable component supply and long-term manufacturability.
Supply support for LTC3426ES6#TRMPBF 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 precision instrumentation, industrial automation, and communications markets.
The LTC3426ES6#TRMPBF belongs to Linear's ThinSOT™ boost converter product line, designed specifically for space-constrained, battery-operated applications demanding high efficiency, low quiescent current, and minimal external component count.
FAQ
What is the minimum input voltage supported by the LTC3426ES6#TRMPBF?
The LTC3426ES6#TRMPBF supports a minimum input voltage of 1.6V, enabling reliable operation from single-cell alkaline, NiMH, or partially discharged Li-ion batteries. This specification is guaranteed across the full –40°C to 85°C operating temperature range and is validated with 2.2µH inductors and ceramic output capacitors per the datasheet test conditions.
Can the LTC3426ES6#TRMPBF generate a stable 3.3V output?
Yes, the LTC3426ES6#TRMPBF can generate a stable 3.3V output using an external resistor divider on the FB pin. With R1 = 75kΩ and R2 = 44.2kΩ (1% tolerance), the device delivers 3.3V at up to 800mA from a 2.5V input, achieving >85% efficiency as verified in Typical Application TA05. Output accuracy is maintained by the 1.22V ±2.4% internal reference.
Does the LTC3426ES6#TRMPBF require an external Schottky diode?
Yes, the LTC3426ES6#TRMPBF requires an external Schottky diode connected between the SW and VOUT pins. The datasheet recommends diodes such as the ON Semiconductor MBRM120LT3 or MBRA210LT3 (2A rated, low VF). Unlike synchronous converters, this part uses asynchronous topology with an internal NMOS switch and external diode for flyback path conduction.
What package type and dimensions does the LTC3426ES6#TRMPBF use?
The LTC3426ES6#TRMPBF uses a 6-lead ThinSOT™ (TSOT-23) package measuring 1.90mm × 2.90mm × 0.80–0.90mm height, compliant with JEDEC MO-193. Pin 1 is marked by a dot; the package features gull-wing leads with 0.95mm pitch and is lead-free with RoHS-compliant finish. Thermal resistance is θJA = 165°C/W and θJC = 102°C/W.
How does the LTC3426ES6#TRMPBF manage EMI in portable designs?
The LTC3426ES6#TRMPBF reduces EMI through three integrated mechanisms: (1) 1.2MHz fixed-frequency operation confines noise to a predictable band, (2) internal antiringing circuitry activates a 100Ω switch from SW to VIN during discontinuous mode to damp inductor oscillation, and (3) current-mode control with slope compensation ensures stable, low-noise regulation compatible with small ceramic filters.
LTC3426ES6#TRMPBF 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#TRMPBF FAQ
1.How can I place an order for LTC3426ES6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3426ES6#TRMPBF 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#TRMPBF reliable?
The price and inventory of LTC3426ES6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3426ES6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3426ES6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3426ES6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3426ES6#TRMPBF?
LTC3426ES6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3426ES6#TRMPBF 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#TRMPBF?
For technical support, including LTC3426ES6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3426ES6#TRMPBF requirements.
6.How does Aetrix verify that LTC3426ES6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3426ES6#TRMPBF 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#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3426ES6#TRMPBF?
All LTC3426ES6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3426ES6#TRMPBF, 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#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3426ES6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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