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Analog Devices Inc. LTC3406ABES5#TRMPBF
- Part No.:
- LTC3406ABES5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC3406ABES5#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,077
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Product details
Overview
LTC3406ABES5#TRMPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, monolithic synchronous step-down DC/DC regulator in a 5-lead TSOT-23 package. It delivers up to 600mA output current with 1.5MHz fixed-frequency operation, 2.5V–5.5V input range, and 0.6V feedback reference-optimized for single Li-Ion battery-powered portable systems requiring low quiescent current (200µA active, <1µA shutdown) and low dropout via 100% duty cycle.
For engineers reviewing the LTC3406ABES5#TRMPBF datasheet, LTC3406ABES5#TRMPBF pinout, LTC3406ABES5#TRMPBF application, or LTC3406ABES5#TRMPBF equivalent, key selection criteria include its internal P/N-channel MOSFETs (RDS(ON) = 0.35Ω typ), ±2% 0.6V reference accuracy, pulse-skipping mode for low-noise light-load operation, and thermal protection at 125°C junction temperature.
Technical Context
The LTC3406ABES5#TRMPBF employs a constant-frequency, current-mode control architecture with integrated P-channel main and N-channel synchronous switches. Its peak-current loop uses an error amplifier output to set inductor peak current, while slope compensation prevents subharmonic oscillation above 40% duty cycle-patented to preserve full 1.3A peak current capability across all operating conditions.
It supports discontinuous conduction mode (DCM) at light loads and transitions seamlessly into pulse-skipping mode to maintain regulation with minimal output ripple. The RUN pin enables precise enable/disable control with 0.3V–1.5V thresholds, and internal soft-start limits inrush current over 0.9ms typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 600mA continuous-supports portable loads like baseband processors and RF transceivers without external current boosting. |
| Input Voltage Range | 2.5V to 5.5V-fully covers single-cell Li-Ion (2.7V–4.2V) with margin for voltage sag and charging peaks. |
| Switching Frequency | 1.5MHz (±20%)-enables use of compact 2.2µH inductors and ceramic capacitors under 10µF for space-constrained designs. |
| Feedback Reference | 0.6V ±2%-allows precise output programming from 0.6V to 5.5V using standard resistor dividers; stable over –40°C to 85°C. |
| Quiescent Current | 200µA typical in active mode-minimizes battery drain during standby; drops to <1µA in shutdown for zero-load preservation. |
| Efficiency Peak | 96% at 600mA-achieved via synchronous rectification eliminating Schottky loss, and low RDS(ON) FETs (0.23Ω/0.21Ω typ). |
| Duty Cycle Limit | 100%-enables true low-dropout operation down to VOUT + ILOAD × RDS(ON), extending runtime near battery end-of-discharge. |
Pinout & Package
Package: 5-lead TSOT-23 (ThinSOT™), 1mm height, JEDEC MO-193 compliant. Pin pitch 0.95mm, body size 2.9mm × 1.6mm × 1.0mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RUN (Pin 1) | Enable/Shutdown Control Input | Logic-level input: >1.5V enables regulation; <0.3V forces shutdown (<1µA IQ). Must not float-requires pull-up or active drive. |
| GND (Pin 2) | Power and Signal Ground Reference | Primary return path for VIN, SW, and feedback network; must be low-impedance connection to PCB ground plane. |
| SW (Pin 3) | Internal Switch Node | Connection point for external inductor; carries high di/dt switching current-requires short, wide trace to minimize EMI and voltage spikes. |
| VIN (Pin 4) | Main Power Input | Supplies both IC bias and power switches; requires ≥2.2µF ceramic decoupling capacitor placed adjacent to pin. |
| VFB (Pin 5) | Feedback Input | Monitors resistive divider output; high-impedance node (±30nA bias)-must be routed away from SW and noisy traces to avoid regulation error. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated P- and N-channel MOSFETs eliminate external Schottky diode-reducing BOM count, board area, and conduction losses. |
| Pulse-Skipping Mode | Automatically engages at light loads to maintain regulation while minimizing switching loss and output ripple-ideal for noise-sensitive analog/RF sections. |
| Low Dropout Operation | 100% duty cycle capability allows VOUT regulation even when VIN approaches VOUT + ILOADRDS(ON), maximizing usable battery capacity. |
| Current-Mode Control | Provides inherent cycle-by-cycle current limiting, fast transient response to load steps, and stable operation with ceramic output capacitors (no ESR dependency). |
| Thermal Shutdown Protection | Activates at ~150°C junction temperature-disables both switches and places SW in high-impedance state to prevent thermal runaway. |
Applications
| Cellular Telephones | Satellite/GPS Receivers |
|---|---|
Use Scenario: Powering baseband processor core voltage (1.2V/600mA) from single Li-Ion cell during active call or data transmission. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise supply with fast load-step response. Use Value: Extends talk time via 96% peak efficiency and 200µA quiescent current; 100% duty cycle sustains operation down to 2.7V battery voltage. |
Use Scenario: Supplying LNA and downconverter circuitry (1.8V/300mA) in handheld GPS modules with strict EMI and ripple requirements. IC Role / Device Role / Timing Role: Low-ripple, pulse-skipping mode regulator delivering clean power during satellite signal acquisition. Use Value: Sub-10mVpp output ripple at light loads avoids desensitization of RF front-end; 1.5MHz switching keeps harmonics outside GPS L1 band (1.575GHz). |
| Wireless Modems | Digital Still Cameras |
Use Scenario: Generating 2.5V/600mA for Wi-Fi/BT SoC in battery-powered IoT gateways with intermittent high-power transmit bursts. IC Role / Device Role / Timing Role: High-current, thermally robust buck converter handling 600mA pulsed loads with minimal voltage droop. Use Value: Internal 0.35Ω RDS(ON) FETs and thermal shutdown ensure reliable operation during sustained 802.11n TX bursts without derating. |
Use Scenario: Powering image sensor and ISP core (1.2V/500mA) during burst capture mode in compact digital cameras. IC Role / Device Role / Timing Role: Fast-transient synchronous regulator supporting rapid on/off cycling of sensor blocks. Use Value: 0.9ms soft-start prevents mechanical shutter jitter; current-mode control limits output undershoot to <30mV during 500mA load steps. |
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 |
|---|---|---|---|
| TPS62231DRYR | 2.05V–6.5V input; 3MHz switching; 0.6V ref; 600mA; 17µA IQ; WSON-6 package (2mm × 2mm) | Better light-load efficiency via DCS-Control™, but higher minimum input voltage excludes 2.5V Li-Ion start-up. | Prefer for ultra-low IQ and smaller footprint where input >2.05V is guaranteed. |
| MAX17222ELT+T | 0.7V–5.5V input; 1.2MHz; 0.6V ref; 500mA; 1.3µA IQ (shutdown); 1.5µA IQ (active); 6-pin µDFN | Lower quiescent current and wider VIN range, but 500mA limit and no 100% duty cycle. | Prefer for ultra-low-power always-on sensors; avoid for 600mA or deep-dropout Li-Ion apps. |
Compared with LTC3406ABES5#TRMPBF, TPS62231DRYR offers higher frequency and lower IQ but lacks 2.5V start-up and 100% duty cycle; MAX17222ELT+T provides superior shutdown current and wider VIN but sacrifices output current headroom and dropout capability-making LTC3406ABES5#TRMPBF optimal for 600mA Li-Ion systems demanding full battery utilization.
Availability
LTC3406ABES5#TRMPBF is available at Aetrix Electronics and suitable for cellular telephones, satellite/GPS receivers, and wireless modems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC3406ABES5#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 its legacy high-performance power management portfolio with rigorous automotive-grade qualification and reliability testing.
The LTC3406ABES5#TRMPBF belongs to Linear's ThinSOT™ synchronous buck regulator family, designed specifically for space-constrained, battery-powered portable electronics needing high efficiency, low noise, and seamless dropout operation.
FAQ
What is the maximum output current capability of the LTC3406ABES5#TRMPBF?
The LTC3406ABES5#TRMPBF is rated for 600mA continuous output current under typical thermal conditions (θJA = 250°C/W, TA ≤ 85°C). Peak inductor current capability is 1.3A, enabling robust transient response. Derating is required at elevated ambient temperatures or with poor PCB copper area-full 600mA is achievable with ≥1in² 2oz copper on top layer connected to GND pin.
Does the LTC3406ABES5#TRMPBF require an external Schottky diode?
No, the LTC3406ABES5#TRMPBF does not require an external Schottky diode. It integrates both a P-channel main switch and an N-channel synchronous switch, enabling fully synchronous rectification. This eliminates diode forward-voltage loss and improves efficiency by up to 8% compared to asynchronous designs at medium-to-high loads.
What is the purpose of the RUN pin on the LTC3406ABES5#TRMPBF?
The RUN pin on the LTC3406ABES5#TRMPBF provides logic-controlled enable/disable functionality. Pulling RUN above 1.5V enables regulation with internal soft-start; pulling it below 0.3V places the device in shutdown, reducing supply current to <1µA. The pin must never be left floating-it requires a defined voltage or pull-up resistor to ensure predictable startup and power sequencing.
Can the LTC3406ABES5#TRMPBF operate with a 2.5V input supply?
Yes, the LTC3406ABES5#TRMPBF supports a minimum input voltage of 2.5V, making it compatible with discharged single-cell Li-Ion batteries (down to ~2.7V typical, with margin). At 2.5V input and 1.8V output, it operates in 100% duty cycle mode-regulating via the P-channel FET's RDS(ON)-and maintains output accuracy within ±2% as long as junction temperature remains below 125°C.
How does the LTC3406ABES5#TRMPBF handle light-load conditions?
The LTC3406ABES5#TRMPBF automatically enters pulse-skipping mode at light loads to maintain output regulation while minimizing switching loss and output voltage ripple. Unlike Burst Mode® (used in the pin-compatible LTC3406A), this method preserves low noise and avoids audible switching artifacts-making it ideal for powering sensitive analog or RF circuitry in portable devices.
LTC3406ABES5#TRMPBF 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#TRMPBF FAQ
1.How can I place an order for LTC3406ABES5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3406ABES5#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 LTC3406ABES5#TRMPBF reliable?
The price and inventory of LTC3406ABES5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3406ABES5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC3406ABES5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3406ABES5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3406ABES5#TRMPBF?
LTC3406ABES5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3406ABES5#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 LTC3406ABES5#TRMPBF?
For technical support, including LTC3406ABES5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3406ABES5#TRMPBF requirements.
6.How does Aetrix verify that LTC3406ABES5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC3406ABES5#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 LTC3406ABES5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC3406ABES5#TRMPBF?
All LTC3406ABES5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3406ABES5#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 LTC3406ABES5#TRMPBF part is unused and in its original packaging.
Return procedure for LTC3406ABES5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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