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Analog Devices Inc. LTC3401EMS#TRPBF
- Part No.:
- LTC3401EMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC3401EMS#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 1A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,238
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Product details
Overview
LTC3401EMS#TRPBF from Analog Devices (formerly Linear Technology) is a micropower, fixed-frequency synchronous boost DC/DC converter optimized for ultra-low-voltage start-up and high-efficiency operation in battery-powered systems. It features a 0.16Ω N-channel MOSFET switch, 0.18Ω P-channel synchronous rectifier, 1A switch current rating, 0.85V typical start-up voltage, and adjustable output from 2.6V to 5.5V - enabling single- or dual-cell alkaline/NiMH/Li-ion applications such as GPS receivers and handheld instruments.
For engineers reviewing the LTC3401EMS#TRPBF datasheet, LTC3401EMS#TRPBF pinout, LTC3401EMS#TRPBF application, or LTC3401EMS#TRPBF equivalent, key selection criteria include Burst Mode® quiescent current (38μA), 3MHz programmable switching frequency, OPTI-LOOP® compensation architecture, antiringing control for EMI reduction, and MSOP-10 thermal performance (θJA = 100°C/W on 4-layer board).
Technical Context
The LTC3401EMS#TRPBF employs peak current-mode control with adaptive slope compensation, eliminating right-half-plane zero stability concerns and simplifying loop compensation. Its internal error amplifier (gm = 85 μmhos) drives the VC pin for OPTI-LOOP® compensation, while lossless current sensing enables precise cycle-by-cycle current limiting at 1.6A typical.
Switching is fully programmable via an external resistor on Rt (fOSC = 3×1010/Rt Hz) and supports synchronization to an external clock on MODE/SYNC. The IC integrates antiringing control to damp SW-node ringing during discontinuous conduction mode, and zero-current detection shuts off the PMOS rectifier below ~50mA to prevent reverse inductor current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.5V to 5.5V operating; enables direct start-up from single NiMH/alkaline cell (0.85V typ) |
| Output Voltage Range | 2.6V to 5.5V adjustable via FB divider; supports 3.3V logic rails and 5V USB-peripheral interfaces |
| Switch Current Limit | 1.6A typical; sustains 500mA output at 3.3V from 1.8V input with >90% efficiency |
| Quiescent Current | 38μA in Burst Mode®; extends battery life in low-duty-cycle portable devices (e.g., pagers, wireless handsets) |
| Switching Frequency | Up to 3MHz (programmable); allows use of sub-2mm-height inductors (e.g., 1μH) for ultra-compact layouts |
| Feedback Reference | 1.25V ±3% (1.22–1.28V); sets output accuracy and enables stable regulation under load transients |
| Thermal Shutdown | 170°C; protects device during overload or poor PCB heatsinking without latch-up |
Pinout & Package
Package: 10-lead thermally enhanced MSOP (3.0mm × 3.0mm × 1.1mm max height), with exposed pad for improved thermal dissipation (θJA = 100°C/W on 4-layer board). Pin 1 marked by dot; pin 1–5 on top row left-to-right, pin 6–10 on bottom row right-to-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Rt (Pin 1) | Oscillator timing input | Connects to ground via resistor to set switching frequency (f = 3×10¹⁰/Rt Hz); enables 300kHz–3MHz range |
| MODE/SYNC (Pin 2) | Burst Mode control / clock sync input | High = Burst Mode®; Low = fixed-frequency; external clock = sync + fixed-frequency disable |
| VIN (Pin 3) | Main input supply | Accepts 0.5V–5.5V; powers internal circuitry until VOUT > 2.3V, then self-biased from VOUT |
| SW (Pin 4) | Power switch node | Connects to inductor and optional Schottky diode; rated –0.5V to 6V; requires short trace for EMI control |
| GND (Pin 5) | Signal and power ground | Common reference for all analog/digital functions; must be low-impedance connection to thermal pad |
| PGOOD (Pin 6) | Open-drain power-good flag | Asserts low when FB voltage drops >9% below 1.25V; used for system sequencing and fault monitoring |
| VOUT (Pin 7) | Regulated output / bootstrap supply | Delivers regulated output; also powers internal gate drivers; requires ≥1μF ceramic capacitor adjacent to GND |
| FB (Pin 8) | Feedback input | Monitors resistive divider from VOUT; 1.25V reference enables precise output adjustment and load regulation |
| VC (Pin 9) | Error amplifier output | Drives external compensation network (e.g., RZ, CC1, CC2) for OPTI-LOOP® stability |
| SHDN (Pin 10) | Shutdown enable | Ground = shutdown (<1μA IQ); >1V = active; supports hysteresis for low-VIN operation |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 0.16Ω NMOS + 0.18Ω PMOS switches eliminate external Schottky diode for VOUT < 4.3V, improving light-load efficiency up to 97% |
| Burst Mode® operation | User-selectable via MODE/SYNC pin; reduces quiescent current to 38μA at light loads while maintaining regulation, extending battery runtime |
| Antiringing control | Active damping circuit suppresses high-frequency ringing on SW pin during DCM, reducing radiated EMI without snubbers |
| OPTI-LOOP® compensation | VC-pin-based transconductance amplifier (85 μmhos) enables simple Type II/III compensation for robust transient response and stability |
| Low-voltage start-up | Starts reliably at 0.85V (typ) with no external bias; operates down to 0.5V VIN once running, ideal for fading battery applications |
Applications
| GPS Receivers | Handheld Instruments |
|---|---|
Use Scenario: Powering 3.3V RF front-end and baseband processor from single 1.2–1.5V NiMH cell in compact field-deployable units. IC Role / Device Role / Timing Role: Synchronous boost converter providing regulated 3.3V output with Burst Mode® to minimize idle current draw between satellite acquisition bursts. Use Value: Enables >100-hour battery life at 50mA avg load; 3MHz operation avoids IF band interference (e.g., 455kHz, 1.1MHz). |
Use Scenario: Supplying 5V to microcontroller, display backlight, and sensor interface in portable multimeters or data loggers. IC Role / Device Role / Timing Role: High-efficiency step-up regulator delivering 300mA at 5V from Li-ion (2.5–4.2V) with programmable 1MHz switching for optimal size/efficiency trade-off. Use Value: Achieves >92% efficiency across 10–500mA load range; PGOOD signal enables safe MCU wake-up after rail stabilization. |
| Wireless Handsets | CCFL Backlights |
Use Scenario: Generating 3.3V system rail and 5V USB charging port from single-cell battery in Bluetooth headsets or VoIP phones. IC Role / Device Role / Timing Role: Dual-rail boost controller supporting dynamic load steps (e.g., RF transmit burst) with fast transient response and low-noise fixed-frequency mode. Use Value: Delivers 500mA peak with <3% output ripple; SHDN pin enables full system sleep with <1μA leakage. |
Use Scenario: Driving cold-cathode fluorescent lamp (CCFL) inverters requiring high-voltage AC from low-voltage battery in medical displays or industrial HMIs. IC Role / Device Role / Timing Role: High-voltage boost stage generating 100–200V DC bus for external transformer-driven CCFL driver, with remote dimming support via VC feed-forward. Use Value: Supports analog dimming input (0–2.5V); antiringing control minimizes EMI near sensitive analog video circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3402EMS#TRPBF | 2A switch current rating, same package; higher RDS(ON) (0.12Ω NMOS, 0.14Ω PMOS), identical Burst Mode® and OPTI-LOOP® architecture | Required for >1A output loads (e.g., 3.3V @ 800mA); not drop-in due to different current limit threshold and compensation tuning | Select LTC3402EMS#TRPBF only when sustained >1A output current is needed; re-evaluate inductor and compensation components. |
| LTC3423EMS#TRPBF | Optimized for VOUT < 2.6V; includes LDO post-regulator; lower start-up voltage (0.65V typ); 600mA switch rating; different FB reference (0.6V) | Designed for sub-2.6V rails (e.g., 1.8V, 2.5V) where LTC3401EMS#TRPBF cannot regulate; lacks PGOOD and sync capability | Choose LTC3423EMS#TRPBF for low-voltage logic rails; LTC3401EMS#TRPBF remains preferred for 3.3V/5V outputs with full feature set. |
Compared with LTC3402EMS#TRPBF and LTC3423EMS#TRPBF, the LTC3401EMS#TRPBF uniquely balances 1A capability, 0.85V start-up, and full-feature control (PGOOD, sync, Burst Mode®) in the MSOP-10 footprint - making it the optimal choice for 2.6–5.5V outputs at up to 500mA in space-constrained portable designs.
Availability
LTC3401EMS#TRPBF is available at Aetrix Electronics and suitable for GPS receivers, handheld instrumentation, wireless handsets, and CCFL backlight systems requiring stable component supply, long-term manufacturability, and guaranteed lead-free compliance.
Supply support for LTC3401EMS#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 and maintains its precision analog and power management portfolio. Linear pioneered high-performance DC/DC converters with innovations like Burst Mode® and OPTI-LOOP®.
The LTC3401EMS#TRPBF belongs to Linear's micropower synchronous boost converter family, designed specifically for ultra-low-input-voltage, high-efficiency power conversion in portable and battery-critical applications.
FAQ
What is the minimum input voltage required for the LTC3401EMS#TRPBF to start up?
The LTC3401EMS#TRPBF has a typical start-up voltage of 0.85V and guarantees operation down to 0.5V once started. This enables reliable boot from nearly depleted single-cell alkaline, NiMH, or Li-ion sources. The LTC3401EMS#TRPBF uses internal charge pump and bootstrap techniques to sustain operation even if VIN drops below 0.5V after regulation is established.
Can the LTC3401EMS#TRPBF operate without an external Schottky diode?
Yes - the LTC3401EMS#TRPBF integrates synchronous rectification and requires no external Schottky diode for output voltages below 4.3V. For VOUT > 4.3V, an external Schottky (e.g., MBRM120T3) is mandatory to clamp SW pin voltage within its –0.5V to 6V absolute maximum rating. The LTC3401EMS#TRPBF's internal PMOS switch eliminates conduction losses typical of discrete diodes.
How does Burst Mode® operation affect output voltage ripple on the LTC3401EMS#TRPBF?
In Burst Mode®, the LTC3401EMS#TRPBF delivers energy in short bursts and sleeps between cycles, resulting in variable-frequency ripple with a low-frequency envelope. Steady-state ripple remains typically below 3% of VOUT. This mode reduces quiescent current to 38μA but trades off low-frequency ripple for ultra-low IQ; fixed-frequency mode is preferred when spectral noise must be tightly controlled.
What is the purpose of the antiringing control feature in the LTC3401EMS#TRPBF?
The antiringing control in the LTC3401EMS#TRPBF actively damps high-frequency ringing on the SW pin during discontinuous conduction mode by placing a controlled impedance across the inductor-SW node capacitance. This reduces EMI radiation without external snubbers, simplifies layout, and improves EMC compliance - especially critical in RF-sensitive applications like GPS receivers where the LTC3401EMS#TRPBF is commonly deployed.
Is the LTC3401EMS#TRPBF pin-compatible with other devices in the LTC34xx family?
No - the LTC3401EMS#TRPBF is not pin-compatible with LTC3400, LTC3402, or LTC3423. While all share the MSOP-10 package, pin functions differ significantly (e.g., LTC3400 lacks PGOOD and Rt; LTC3402 has different current-sense scaling; LTC3423 uses 0.6V FB reference). Layout reuse is not possible; each requires dedicated PCB design per its datasheet pinout and compensation requirements.
LTC3401EMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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):
- 0.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1A (Switch)
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
LTC3401EMS#TRPBF FAQ
1.How can I place an order for LTC3401EMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3401EMS#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 LTC3401EMS#TRPBF reliable?
The price and inventory of LTC3401EMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3401EMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3401EMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3401EMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3401EMS#TRPBF?
LTC3401EMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3401EMS#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 LTC3401EMS#TRPBF?
For technical support, including LTC3401EMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3401EMS#TRPBF requirements.
6.How does Aetrix verify that LTC3401EMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3401EMS#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 LTC3401EMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3401EMS#TRPBF?
All LTC3401EMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3401EMS#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 LTC3401EMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC3401EMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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