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Analog Devices Inc. LTC3406ABES5#TRPBF
- Part No.:
- LTC3406ABES5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406ABES5#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
LTC3406ABES5#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency monolithic synchronous step-down DC/DC regulator in a 5-lead TSOT-23 package, delivering up to 600mA output current with 1.5MHz fixed-frequency operation, 2.5V–5.5V input range, and 0.6V feedback reference-designed for single Li-Ion battery-powered portable electronics requiring low quiescent current and low dropout.
For engineers reviewing the LTC3406ABES5#TRPBF datasheet, LTC3406ABES5#TRPBF pinout, LTC3406ABES5#TRPBF application, or LTC3406ABES5#TRPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed efficiency vs. load behavior, real-world thermal limits at 100% duty cycle, and two rigorously cross-checked alternative regulators for adjustable-output buck applications.
Technical Context
The LTC3406ABES5#TRPBF employs a constant-frequency, current-mode control architecture with internal P-channel main and N-channel synchronous MOSFETs-enabling no external Schottky diode requirement and high efficiency up to 96%. Its 1.5MHz switching frequency supports compact 2.2µH inductors and ceramic input/output capacitors.
It features pulse-skipping mode at light loads to maintain regulation while minimizing output ripple, internal soft-start (0.9ms typical), ±2% 0.6V reference accuracy over temperature, and full protection including overtemperature shutdown and 100% duty-cycle low-dropout operation-critical for extending runtime in battery-critical systems like GPS receivers and media players.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 600mA maximum continuous-supports core logic rails in cellular telephones and digital still cameras. |
| Input Voltage Range | 2.5V to 5.5V-fully covers single-cell Li-Ion (2.7V–4.2V) with margin for cold start and aging. |
| Switching Frequency | 1.5MHz (±20%)-enables use of sub-3mm surface-mount inductors and reduces EMI fundamental frequency. |
| Feedback Reference | 0.6V ±2% over –40°C to 85°C-enables precise output programming down to 0.6V (e.g., 1.2V with 301k/301k divider). |
| Quiescent Current | 200µA in active mode, <1µA in shutdown-preserves battery life during standby in portable instruments. |
| RDS(ON) (P-FET) | 0.23Ω typical at 100mA-limits conduction loss in dropout; rises to ~0.27Ω at 70°C ambient per thermal data. |
| Efficiency Peak | 96% at VOUT=1.8V, ILOAD=600mA, VIN=3.6V-achieved via synchronous rectification and low RDS(ON). |
Pinout & Package
Package: 5-Lead Plastic TSOT-23 (S5), 1mm profile, JEDEC MO-193 compliant, θJA = 250°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable/disable control input | Active-high logic: >1.5V enables regulation; <0.3V forces shutdown (<1µA IQ); must not float. |
| GND (Pin 2) | Power and signal ground reference | Primary return path for VIN, SW, and feedback network; requires low-inductance connection to CIN/COUT (-) plates. |
| SW (Pin 3) | Switch node | Connects to inductor and drains of internal P/N-FETs; carries high di/dt square wave-must be routed short and away from VFB. |
| VIN (Pin 4) | Main power input | Supplies internal circuitry and switches; requires ≥4.7µF ceramic decoupling placed adjacent to pin. |
| VFB (Pin 5) | Feedback input | Monitors resistive divider output; senses 0.6V reference point-requires direct trace to R1/R2 junction, remote sensing capable. |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-skipping mode | Maintains regulation at light loads without burst-mode noise; preserves low output ripple for RF-sensitive GPS receivers. |
| 100% duty-cycle operation | Enables dropout down to VIN ≈ VOUT + ILOAD × RDS(ON), extending usable battery voltage range in portable instruments. |
| Internal soft-start | 0.9ms typical VOUT ramp time-limits inrush current into large output capacitance (e.g., 10µF ceramic in media players). |
| Current-mode control | Provides inherent cycle-by-cycle current limiting and excellent transient response to load steps (e.g., 200mA→600mA in cellular modems). |
| Overtemperature protection | Shuts down both FETs when TJ ≈ 150°C-prevents permanent damage during sustained 100% duty-cycle operation at high ambient. |
Applications
| Cellular Telephones | Satellite & GPS Receivers |
|---|---|
Use Scenario: Powering baseband processor core rail (1.2V/600mA) from single Li-Ion battery during call setup and data transmission. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing regulated, low-noise VCC with fast load transient response. Use Value: Pulse-skipping mode maintains <10mV output ripple during low-power tracking, avoiding GPS signal degradation. |
Use Scenario: Supplying LNA and RF front-end (1.8V/300mA) in handheld GPS modules operating across wide temperature ranges. IC Role / Device Role / Timing Role: High-efficiency step-down converter enabling extended satellite acquisition time on limited battery capacity. Use Value: 96% peak efficiency at 3.6VIN/1.8VOUT directly increases time-to-first-fix by reducing thermal throttling. |
| Digital Still Cameras | Portable Instruments |
Use Scenario: Delivering 2.5V/600mA to image sensor and ISP during burst capture mode with rapid on/off cycling. IC Role / Device Role / Timing Role: Fast-enabling buck regulator supporting intermittent high-current bursts while maintaining low standby drain. Use Value: <1µA shutdown current and 0.9ms soft-start enable instant wake-up from deep sleep without capacitor recharge delay. |
Use Scenario: Regulating microcontroller I/O rail (3.3V) in handheld test equipment powered by 3.7V Li-Poly battery. IC Role / Device Role / Timing Role: Compact, thermally robust DC/DC converter ensuring stable supply under varying ambient conditions (–40°C to 85°C). Use Value: Overtemperature protection and validated RDS(ON) vs. temperature curves allow reliable operation in sealed enclosures without forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 1.8–6.5V input, 600mA, 3.5MHz switching, 0.6V ref, but only 92% peak efficiency at 1.8V/600mA. | Higher fSW allows smaller inductors but increases gate drive losses-less optimal for ultra-low IQ battery standby. | Prefer when board space is constrained and higher-frequency EMI filtering is acceptable. |
| MAX17222ETA+T | 2.5–5.5V input, 500mA, 1.6MHz, 0.6V ref, 2.5µA shutdown current-but lacks 100% duty cycle and has lower current rating. | Optimized for ultra-low-power IoT sensors; insufficient for 600mA camera or modem loads. | Prefer only for sub-500mA applications where <3µA shutdown dominates design priority. |
Compared with TPS62231DRVR and MAX17222ETA+T, the LTC3406ABES5#TRPBF uniquely balances 600mA capability, 100% dropout, <1µA shutdown, and 96% efficiency-making it the sole choice among the three for Li-Ion-powered portable systems demanding simultaneous high current, low dropout, and long standby life.
Availability
LTC3406ABES5#TRPBF is available at Aetrix Electronics and suitable for cellular telephones, GPS receivers, digital still cameras, and portable instruments requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for LTC3406ABES5#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 full product support, datasheet archives, and application engineering for legacy Linear regulators.
The LTC3406AB series was designed specifically for space-constrained, battery-powered portable electronics needing high-efficiency, low-IQ, and robust dropout performance in sub-3mm packages.
FAQ
What is the maximum output current capability of the LTC3406ABES5#TRPBF?
The LTC3406ABES5#TRPBF delivers up to 600mA of continuous output current under typical conditions (VIN ≥ 3.0V, TA ≤ 85°C). Peak inductor current capability reaches 1.25A, but sustained 600mA operation requires proper thermal layout and input voltage margin-especially near dropout where RDS(ON) rise increases conduction loss. Derating is advised above 70°C ambient.
Does the LTC3406ABES5#TRPBF support 100% duty-cycle operation, and what are its implications?
Yes, the LTC3406ABES5#TRPBF supports true 100% duty-cycle operation, allowing VOUT regulation even when VIN drops to within ~100mV of the output voltage. This extends usable battery life in portable systems. However, power dissipation becomes ILOAD² × RDS(ON), and RDS(ON) rises with temperature-requiring thermal analysis per the datasheet's θJA = 250°C/W specification.
How does pulse-skipping mode differ from Burst Mode® in the LTC3406ABES5#TRPBF?
The LTC3406ABES5#TRPBF uses pulse-skipping mode-not Burst Mode®-to regulate at light loads. It skips entire switching cycles while maintaining constant 1.5MHz clock timing elsewhere, preserving low output ripple and predictable EMI spectrum. Burst Mode® (found in the pin-compatible LTC3406A) delivers energy in short bursts, causing higher low-frequency ripple and audible noise-unsuitable for GPS or audio-sensitive applications.
What is the recommended input capacitor for the LTC3406ABES5#TRPBF, and why?
A minimum 4.7µF X5R/X7R ceramic capacitor placed directly between VIN (Pin 4) and GND (Pin 2) is recommended for the LTC3406ABES5#TRPBF. This value meets RMS current requirements (~0.3A at 600mA load) and provides low impedance at 1.5MHz to suppress high-frequency switching noise. Larger values (e.g., 10µF) improve hold-up during load transients but require careful layout to avoid ringing with long input traces.
Can the LTC3406ABES5#TRPBF be used with ceramic output capacitors, and are there stability concerns?
Yes, the LTC3406ABES5#TRPBF is fully compatible with ceramic output capacitors-including low-ESR types-as its current-mode control loop does not rely on capacitor ESR for stability. However, input-side ceramic capacitors require attention: long PCB traces between wall adapter and VIN can cause ringing during load steps. Use X5R/X7R dielectrics and place CIN within 2mm of Pins 4 and 2 to ensure stable operation of the LTC3406ABES5#TRPBF.
LTC3406ABES5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LTC3406ABES5#TRPBF FAQ
1.How can I place an order for LTC3406ABES5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406ABES5#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 LTC3406ABES5#TRPBF reliable?
The price and inventory of LTC3406ABES5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406ABES5#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3406ABES5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406ABES5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406ABES5#TRPBF?
LTC3406ABES5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406ABES5#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 LTC3406ABES5#TRPBF?
For technical support, including LTC3406ABES5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406ABES5#TRPBF requirements.
6.How does Aetrix verify that LTC3406ABES5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406ABES5#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 LTC3406ABES5#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3406ABES5#TRPBF?
All LTC3406ABES5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406ABES5#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 LTC3406ABES5#TRPBF part is unused and in its original packaging.
Return procedure for LTC3406ABES5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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