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Analog Devices Inc. LTC3400ES6-1#TRPBF
- Part No.:
- LTC3400ES6-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC3400ES6-1#TRPBF.pdf
- Description:
- IC REG BOOST ADJ 600MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,414
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Product details
Overview
LTC3400ES6-1#TRPBF from Analog Devices (formerly Linear Technology) is a micropower synchronous boost DC/DC converter in a 6-lead SOT-23 package, designed to generate 3.3V at 100mA from a single AA cell (0.85V start-up), featuring 1.2MHz fixed-frequency PWM, internal NMOS switch (0.35Ω @ 3.3V), and PMOS synchronous rectifier (0.45Ω @ 3.3V), used in portable instrumentation and GPS receivers.
For engineers reviewing the LTC3400ES6-1#TRPBF datasheet, LTC3400ES6-1#TRPBF pinout, LTC3400ES6-1#TRPBF application, or LTC3400ES6-1#TRPBF equivalent, key selection criteria include minimum start-up voltage (0.85V), Burst Mode operation (19µA quiescent current), feedback reference (1.23V), antiringing control for EMI reduction, and compatibility with ceramic output capacitors and low-profile inductors.
Technical Context
The LTC3400ES6-1#TRPBF implements current-mode PWM control with an internally compensated transconductance error amplifier (gm = 33 µS) and a fixed 1.2MHz oscillator. Its start-up circuit enables operation from 0.85V input, engaging peak-current-limited switching (850mA typical) until VOUT exceeds 2.3V, after which it transitions to regulated PWM mode independent of VIN.
Burst Mode operation-exclusive to the LTC3400 variant-activates below ~3mA load, reducing quiescent current to 19µA by cycling between sleep (only feedback monitoring active) and brief PWM bursts; the zero-current comparator disables the synchronous rectifier at ~20mA to prevent reverse inductor current and improve light-load efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Start-Up Voltage | 0.85V min - enables reliable boot from deeply discharged alkaline cells. |
| Switching Frequency | 1.2MHz typ - allows use of ≤4.7µH inductors and small ceramic capacitors, minimizing solution footprint. |
| Output Voltage Range | 2.5V to 5V - set via external resistor divider on FB pin using VOUT = 1.23V × (1 + R1/R2). |
| Feedback Reference | 1.23V typ - high-precision internal reference with ±3% tolerance over temperature ensures stable regulation. |
| Quiescent Current (Burst) | 19µA typ - measured at VOUT; enables >1-year battery life in standby for devices drawing <10µA average load. |
| NMOS Switch RDS(ON) | 0.35Ω max @ VOUT = 3.3V - reduces conduction loss and improves efficiency at medium loads (e.g., 100mA). |
| Shutdown Current | <1µA max - logic-controlled SHDN pin disables all circuitry except leakage paths, preserving battery charge. |
Pinout & Package
Package: 6-lead SOT-23 (ThinSOT™), 1mm height, JEDEC MO-193 compliant, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch node | Drain of internal NMOS; connects to inductor; antiringing switch (100Ω to VIN) activates when inductor current reaches zero to suppress EMI. |
| GND (Pin 2) | Signal and power ground | Common return for internal circuits and external output capacitor; requires low-impedance PCB connection to minimize noise and thermal rise. |
| FB (Pin 3) | Feedback input | High-impedance (1nA max) node sensing resistor divider; sets output voltage via 1.23V reference; sensitive to layout-induced noise. |
| SHDN (Pin 4) | Logic shutdown control | Active-high input; pulls to VIN via 1MΩ resistor for normal operation; drives <1µA shutdown current when low. |
| VOUT (Pin 5) | Output voltage sense / rectifier drain | Source of internal PMOS synchronous rectifier; supplies bias once VOUT > VIN; body diode holds VOUT at VIN – 0.6V in shutdown. |
| VIN (Pin 6) | Battery input | Start-up bias source; supplies gate drive until VOUT exceeds VIN; operation becomes VOUT-biased thereafter, enabling ultra-low-VIN operation. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Burst Mode | Reduces system quiescent current to 19µA at light loads without external control, extending battery life in intermittent-use applications like GPS tracking. |
| Antiringing Control | Damps SW-node LC resonance during discontinuous conduction, lowering radiated EMI by >10dB compared to uncontrolled topologies. |
| Internal Synchronous Rectification | Eliminates external Schottky diode losses; achieves up to 92% efficiency at 100mA while maintaining compact size and low thermal profile. |
| Low Start-Up Voltage | 0.85V minimum enables full functionality from a single AA cell even at end-of-life (≈0.9V), avoiding premature device shutdown. |
| Fixed-Frequency Current-Mode Control | Provides predictable EMI spectrum, excellent line/load regulation (<±1%), and inherent cycle-by-cycle current limiting for robust short-circuit protection. |
Applications
| Portable GPS Receivers | Handheld Digital Instruments |
|---|---|
|
Use Scenario: Battery-powered GPS module operating from single AA cell with intermittent position fixes every 30 seconds. IC Role / Device Role / Timing Role: Primary 3.3V power rail generator for GPS baseband IC and RF front-end, delivering 100mA peak during acquisition. Use Value: Burst Mode reduces average supply current to <5µA between fixes, enabling >2-year battery life; 1.2MHz switching avoids interference with GPS L1 band (1.575GHz). |
Use Scenario: Pocket-sized multimeter requiring stable 3.3V for MCU, ADC, and LCD bias under variable battery voltage (1.5V–0.9V). IC Role / Device Role / Timing Role: Main step-up regulator supplying regulated 3.3V to microcontroller and precision analog front-end. Use Value: 0.85V start-up and 0.65V minimum operating voltage maintain operation through full AA cell discharge curve; low-noise fixed frequency prevents measurement offset drift. |
| MP3 Player Audio Bias | Wireless Handset LCD Backlight |
|
Use Scenario: Low-power MP3 decoder IC requiring clean 3.3V supply during playback, with deep sleep between tracks. IC Role / Device Role / Timing Role: Efficient boost converter powering audio codec and flash memory interface, entering Burst Mode during pause. Use Value: 92% peak efficiency minimizes heat near audio components; 19µA Burst Mode IQ extends playback time by 35% versus continuous switching. |
Use Scenario: GSM handset backlight driver needing 5V from single Li-ion cell (3.0–4.2V), with rapid on/off cycling during display updates. IC Role / Device Role / Timing Role: Intermediate 5V rail generator feeding white LED driver IC, supporting fast transient response for brightness modulation. Use Value: 1.2MHz switching enables <10µs output recovery from 10mA→100mA load steps; internal synchronous rectifier eliminates diode forward drop, improving dimming linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3400BES6#TRPBF | No Burst Mode; continuous switching at light loads (no low-frequency ripple); higher light-load IQ (300µA vs 19µA). | Better for noise-sensitive analog circuits where Burst Mode's 1–10kHz ripple is unacceptable (e.g., precision sensor signal chains). | Select LTC3400BES6#TRPBF only if consistent low-noise output outweighs battery life penalty in always-on systems. |
| LTC3402EDD#TRPBF | 2A switch current limit, 3MHz switching, MSOP-10 package, separate BIAS pin for improved low-VIN efficiency. | Supports higher output currents (up to 500mA) and wider input range (0.5V–4.5V); requires larger inductor and more board area. | Choose LTC3402EDD#TRPBF when scaling beyond 100mA or requiring sub-0.8V start-up; not drop-in compatible due to pin count and layout. |
Compared with LTC3400BES6#TRPBF, the LTC3400ES6-1#TRPBF trades light-load noise performance for superior battery longevity in duty-cycled devices; versus LTC3402EDD#TRPBF, it offers minimal footprint and lower cost for ≤100mA applications but lacks scalability for higher power.
Availability
LTC3400ES6-1#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, GPS receivers, and handheld audio devices requiring stable component supply, long battery life, and ultra-low-voltage start-up capability.
Supply support for LTC3400ES6-1#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 legacy of high-performance analog and power management ICs, with global manufacturing, testing, and quality assurance infrastructure.
The LTC3400 family was designed specifically for micropower, single-cell portable applications demanding high efficiency across wide load ranges, emphasizing start-up reliability, EMI control, and minimal external component count.
FAQ
What is the minimum input voltage required for the LTC3400ES6-1#TRPBF to start switching?
The LTC3400ES6-1#TRPBF has a guaranteed minimum start-up voltage of 0.85V at 1mA load, enabling reliable operation from nearly depleted AA/AAA alkaline cells. Once started, it continues regulating down to 0.5V input (minimum operating voltage), as bias shifts from VIN to VOUT after startup.
Does the LTC3400ES6-1#TRPBF require an external Schottky diode?
No, the LTC3400ES6-1#TRPBF integrates both NMOS switch and PMOS synchronous rectifier, eliminating the need for an external Schottky diode in most applications. An optional Schottky may be added for outputs ≥4.5V to improve efficiency by ~2–3%, but it is not required for 3.3V operation.
How does Burst Mode operation affect output voltage ripple on the LTC3400ES6-1#TRPBF?
Burst Mode on the LTC3400ES6-1#TRPBF introduces low-frequency (1–10kHz) output ripple during light loads due to intermittent PWM bursts. Peak-to-peak ripple can reach ~20mV with standard 4.7µF output capacitance; adding a 15–220pF feedforward capacitor (CFF) from VOUT to FB reduces this significantly without compromising efficiency.
Can the LTC3400ES6-1#TRPBF regulate output voltages other than 3.3V?
Yes, the LTC3400ES6-1#TRPBF supports adjustable output voltages from 2.5V to 5V using a resistor divider on the FB pin, per the equation VOUT = 1.23V × (1 + R1/R2). The datasheet provides verified designs for 2.5V, 3.3V, and 5V outputs, all maintaining ≥90% efficiency at rated load.
What is the thermal performance of the LTC3400ES6-1#TRPBF in SOT-23 package?
The LTC3400ES6-1#TRPBF has a junction-to-case thermal resistance (θJC) of 102°C/W. In a standard 2-layer PCB with 1-inch² copper pour under the package, it typically rises ≤25°C above ambient at 100mA output. For continuous 100mA operation, keep ambient temperature ≤70°C and avoid enclosing the device in sealed enclosures without airflow.
LTC3400ES6-1#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):
- 0.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 600mA (Switch)
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-6
LTC3400ES6-1#TRPBF FAQ
1.How can I place an order for LTC3400ES6-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3400ES6-1#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 LTC3400ES6-1#TRPBF reliable?
The price and inventory of LTC3400ES6-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3400ES6-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3400ES6-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3400ES6-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3400ES6-1#TRPBF?
LTC3400ES6-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3400ES6-1#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 LTC3400ES6-1#TRPBF?
For technical support, including LTC3400ES6-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3400ES6-1#TRPBF requirements.
6.How does Aetrix verify that LTC3400ES6-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3400ES6-1#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 LTC3400ES6-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3400ES6-1#TRPBF?
All LTC3400ES6-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3400ES6-1#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 LTC3400ES6-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3400ES6-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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