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Analog Devices Inc. LTC3400ES6#TRMPBF
- Part No.:
- LTC3400ES6#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC3400ES6#TRMPBF.pdf
- Description:
- IC REG BOOST ADJ 600MA TSOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,293
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Product details
Overview
LTC3400ES6#TRMPBF from Analog Devices (formerly Linear Technology) is a micropower synchronous boost DC/DC converter in a 6-lead SOT-23 package, delivering up to 100mA at 3.3V from a single AA cell (0.85V start-up), featuring 1.2MHz fixed-frequency PWM, internal NMOS/PMOS switches (0.35Ω/0.45Ω RDS(ON)), and automatic Burst Mode operation for ultra-low quiescent current (19µA in sleep). It targets space-constrained portable power rails requiring high efficiency down to sub-1V input.
For engineers reviewing the LTC3400ES6#TRMPBF datasheet, LTC3400ES6#TRMPBF pinout, LTC3400ES6#TRMPBF application, or LTC3400ES6#TRMPBF equivalent, key selection criteria include minimum start-up voltage (0.85V), feedback reference (1.23V), Burst Mode threshold (~3mA), antiringing control for EMI reduction, and compatibility with ceramic output capacitors and low-profile inductors in handheld instrumentation and GPS receivers.
Technical Context
The LTC3400ES6#TRMPBF implements current-mode PWM control with internal slope compensation and a transconductance error amplifier (gm = 33 µS), enabling stable regulation across wide input/output ranges. Its start-up circuit operates independently below 2.3V VOUT, supporting operation from deeply discharged batteries while maintaining fixed 1.2MHz switching until light-load conditions trigger Burst Mode.
Burst Mode operation disables most internal circuitry except the feedback comparator and wake-up logic, reducing output load current to 19µA (typ) and minimizing battery drain during standby. Antiringing control actively damps SW-pin resonance by connecting a 100Ω switch between SW and VIN when inductor current reaches zero, suppressing high-frequency ringing without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Start-up Voltage | 0.85V min - enables operation from nearly depleted alkaline or NiMH cells |
| Switching Frequency | 1.2MHz typ - allows use of ≤4.7µH inductors and 4.7µF ceramic capacitors |
| Feedback Reference | 1.23V ±3% - sets output voltage via external resistor divider (2.5V–5V range) |
| Burst Mode Threshold | ~3mA load - triggers sleep mode to reduce quiescent current to 19µA |
| NMOS RDS(ON) | 0.35Ω @ 3.3V - limits conduction loss at 100mA output (≤35mW dissipation) |
| Shutdown Current | <1µA - ensures negligible battery drain when disabled via SHDN pin |
| Efficiency | Up to 92% @ 100mA - achieved via synchronous rectification and low-RDS(ON) switches |
Pinout & Package
Package: 6-lead SOT-23 (ThinSOT™), 1mm height, JEDEC MO-193 compliant, footprint compatible with standard SOT-23 land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch node | Connects to inductor; internal NMOS drain and PMOS source; antiringing switch ties to VIN when current ceases |
| GND (Pin 2) | Power and signal ground | Primary return path for inductor current and IC bias; requires low-impedance PCB connection to output capacitor negative terminal |
| FB (Pin 3) | Feedback input | Senses resistor divider output; regulates VOUT to 1.23V × (1 + R1/R2); input bias current ≤1nA minimizes divider error |
| SHDN (Pin 4) | Logic shutdown control | Active-high; pulls internal circuitry into sub-1µA shutdown state; requires ≥1V to enable, ≤0.35V to disable |
| VOUT (Pin 5) | Output voltage sense / PMOS drain | Provides bias for internal circuitry once started; body diode holds VOUT ≈ VIN – 0.6V in shutdown |
| VIN (Pin 6) | Battery input | Supplies start-up bias; after startup, device operates independently of VIN as long as VOUT > VIN |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Burst Mode | Reduces quiescent current to 19µA at light loads, extending battery life in intermittent-use devices like GPS receivers |
| Antiringing Control | Internally damps SW-node resonance without snubbers, lowering radiated EMI in compact layouts |
| Low Start-Up Voltage | 0.85V minimum enables reliable boot from single-cell alkaline/NiMH sources down to end-of-life voltage |
| Internal Synchronous Rectifier | Eliminates external Schottky diode losses, improving efficiency by ~5–8% over asynchronous designs |
| Fixed-Frequency PWM | 1.2MHz operation simplifies EMI filtering and supports miniature passive component selection |
Applications
| Handheld Instruments | GPS Receivers |
|---|---|
Use Scenario: Portable multimeters and data loggers powered by single AA/AAA cells requiring stable 3.3V rail for MCU and ADC. IC Role / Device Role / Timing Role: Primary step-up regulator generating regulated 3.3V from 0.9–1.5V battery input; provides clean supply independent of battery droop. Use Value: 92% peak efficiency and 0.85V start-up ensure >200 hours of runtime on one AA cell under typical 10mA average load. | Use Scenario: Battery-powered GPS modules needing continuous 3.3V supply during satellite acquisition and tracking phases. IC Role / Device Role / Timing Role: Main power converter supplying RF front-end and baseband processor; Burst Mode maintains <20µA quiescent draw during satellite search intervals. Use Value: Antiringing control suppresses SW-node ringing that could interfere with 1.575GHz GPS L1 band reception. |
| Digital Cameras | MP3 Players |
Use Scenario: Compact digital cameras using single-cell alkaline batteries to power image sensor bias, flash charging, and display backlight drivers. IC Role / Device Role / Timing Role: Generates 3.3V for microcontroller and memory interface; handles pulsed 100mA loads during image capture. Use Value: 600mA current limit and fast 1.2MHz response support transient 50mA camera sensor bursts without output sag. | Use Scenario: Flash-based MP3 players operating from single AA/AAA cells, requiring efficient 3.3V supply for audio DAC and flash memory interface. IC Role / Device Role / Timing Role: Primary DC/DC converter powering system-on-chip and audio subsystem; enters Burst Mode during music playback pause. Use Value: 19µA Burst Mode current extends standby time to >30 days on one alkaline cell. |
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#TRMPBF | Continuous switching at light loads (no Burst Mode); higher light-load quiescent current (300–500µA active vs. 19µA sleep) | Preferred where low-frequency output ripple must be avoided (e.g., sensitive analog sensors) | Select LTC3400BES6#TRMPBF only if Burst Mode-induced ripple is unacceptable and battery life is secondary |
| LTC3423EDD#TRMPBF | 3MHz switching, separate BIAS pin for low-VIN operation, 1A current limit, 10-lead DFN package | Supports lower output voltages (down to 2.4V) and higher currents; requires different layout and external compensation | Choose LTC3423EDD#TRMPBF for designs needing >100mA output or dual-bias (VIN + VOUT) operation |
Compared with LTC3400ES6#TRMPBF, LTC3400BES6#TRMPBF trades battery longevity for ripple-free light-load performance, while LTC3423EDD#TRMPBF offers higher current and frequency at the cost of increased board area and design complexity.
Availability
LTC3400ES6#TRMPBF is available at Aetrix Electronics and suitable for handheld instruments, GPS receivers, and digital cameras requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC3400ES6#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 and maintains full product support, documentation, and manufacturing continuity for legacy Linear parts including the LTC series.
The LTC3400 family was designed specifically for ultra-low-voltage, high-efficiency boost conversion in single-cell portable electronics, emphasizing micropower operation, minimal external components, and robust start-up behavior.
FAQ
What is the minimum input voltage required for LTC3400ES6#TRMPBF to start switching?
The LTC3400ES6#TRMPBF has a guaranteed minimum start-up voltage of 0.85V at 1mA load, enabling reliable operation from nearly exhausted alkaline or NiMH cells. Once started, it continues regulating as long as the battery can deliver sufficient power, even if VIN drops below 0.85V - regulation depends on output power demand and battery internal resistance, not VIN level alone. This behavior is confirmed in the Electrical Characteristics table and Figure 3 (Minimum Start-Up Voltage vs Load Current).
Does LTC3400ES6#TRMPBF require an external Schottky diode?
No, the LTC3400ES6#TRMPBF does not require an external Schottky diode because it integrates a synchronous PMOS rectifier. An optional Schottky diode may be added across SW and VOUT only for output voltages ≥4.5V to improve efficiency by ~2–3%, but it is unnecessary for 3.3V or 5V outputs per the Applications Information section. The internal rectifier eliminates reverse-recovery losses and reduces thermal stress compared to discrete diode solutions.
How does Burst Mode operation affect output voltage ripple in LTC3400ES6#TRMPBF?
In Burst Mode, the LTC3400ES6#TRMPBF discontinuously delivers energy to the output, causing low-frequency (1–10kHz) output voltage ripple proportional to load current - typically ~1% droop before wake-up. This is distinct from high-frequency (1.2MHz) ripple seen in continuous mode. Figure G08 shows this transient behavior: VOUT sags ~33mV (1%) before the device resumes PWM. Adding a feedforward capacitor (CFF = 15–220pF) between FB and VOUT can reduce both peak-to-peak ripple and input quiescent current during Burst Mode.
Can LTC3400ES6#TRMPBF regulate output voltages other than 3.3V?
Yes, the LTC3400ES6#TRMPBF supports adjustable output voltages from 2.5V to 5V using an external resistor divider on the FB pin, per the equation VOUT = 1.23V × (1 + R1/R2). Typical configurations include 2.5V (R1 = R2 = 1.02MΩ), 3.3V (R1 = 1.02MΩ, R2 = 604kΩ), and 5V (R1 = 1.02MΩ, R2 = 332kΩ), all verified in the Typical Applications circuits (TA01a, TA02a, TA04a). The feedback reference tolerance is ±3% (1.192V–1.268V), ensuring tight regulation across temperature.
What is the maximum continuous output current achievable with LTC3400ES6#TRMPBF?
The LTC3400ES6#TRMPBF delivers up to 100mA continuously at 3.3V from a single AA cell (1.2V–1.5V input), as specified in the Features list and validated in Figure 1 and Figure 3 (Maximum Output Current vs Inductance). At higher input voltages (e.g., 1.8V lithium), output current capability increases - up to ~180mA at 90% efficiency with 4.7µH inductance per Figure F03. The 600mA current limit protects against short-circuit faults but is not sustainable continuously due to thermal constraints in the SOT-23 package.
LTC3400ES6#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):
- 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#TRMPBF FAQ
1.How can I place an order for LTC3400ES6#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3400ES6#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 LTC3400ES6#TRMPBF reliable?
The price and inventory of LTC3400ES6#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3400ES6#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3400ES6#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3400ES6#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3400ES6#TRMPBF?
LTC3400ES6#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3400ES6#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 LTC3400ES6#TRMPBF?
For technical support, including LTC3400ES6#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3400ES6#TRMPBF requirements.
6.How does Aetrix verify that LTC3400ES6#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3400ES6#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 LTC3400ES6#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3400ES6#TRMPBF?
All LTC3400ES6#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3400ES6#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 LTC3400ES6#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3400ES6#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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