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Analog Devices Inc. LT8410EDC#TRMPBF
- Part No.:
- LT8410EDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8410EDC#TRMPBF.pdf
- Description:
- IC REG BOOST ADJ 20MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,877
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Product details
Overview
LT8410EDC#TRMPBF from Analog Devices (formerly Linear Technology) is an ultralow-power boost converter IC with integrated NPN power switch, Schottky diode, and PMOS output disconnect circuitry. It operates from 2.5V to 16V input, delivers up to 40V output, features 8.5μA quiescent current in active mode, 0μA in shutdown, and uses variable peak-current/variable off-time control for high efficiency across wide load ranges. It is used in sensor power supplies where low standby consumption and output isolation during shutdown are critical.
For engineers reviewing the LT8410EDC#TRMPBF datasheet, LT8410EDC#TRMPBF pinout, LT8410EDC#TRMPBF application, or LT8410EDC#TRMPBF equivalent, key selection considerations include its 25mA switch current limit, integrated 12.4MΩ/0.4MΩ feedback divider, 2mm × 2mm DFN-8 package with exposed pad, soft-start via VREF capacitor, and overvoltage protection on CAP and VOUT pins.
Technical Context
The LT8410EDC#TRMPBF employs a variable peak inductor current and variable switch off-time control scheme-distinct from fixed-frequency PWM-to minimize output voltage ripple and maximize efficiency from microamp to milliamp loads. Its internal 1.235V reference and high-ratio (31.85×) feedback scaling enable precise output voltage setting via external resistor dividers from VREF or direct FBP biasing.
It integrates a comparator on the SHDN pin with 1.30V threshold and 60mV hysteresis, enabling programmable enable functions using external resistors. The PMOS output disconnect switch blocks VOUT from VIN during shutdown, limiting disconnect current to 19mA (typ), while the internal NPN switch exhibits 150mV VCE(SAT) at 10mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 16V - supports single-cell Li-ion, multi-cell alkaline, and industrial supply rails without external LDO pre-regulation. |
| Output Voltage Range | Up to 40V - enables biasing of RF MEMS relays, photodiodes, and high-voltage sensors directly from low-voltage sources. |
| Quiescent Current | 8.5μA (active), 0μA (shutdown) - extends battery life in always-on sensor nodes by minimizing standby drain. |
| Switch Current Limit | 25mA (LT8410 variant) - sets maximum inductor peak current; determines achievable output power at given VIN/VOUT ratio. |
| Reference Voltage | 1.235V (typ), ±1.2% over temperature - provides stable feedback reference for accurate output regulation across –40°C to 125°C. |
| Package | 8-pin 2mm × 2mm DFN with exposed thermal pad - enables compact, thermally efficient layout in space-constrained IoT and portable designs. |
| Integrated Components | NPN switch, Schottky diode, PMOS disconnect, 12.4MΩ/0.4MΩ feedback divider - eliminates 5 external components vs discrete boost solutions. |
Pinout & Package
LT8410EDC#TRMPBF is housed in an 8-lead plastic DFN package (2mm × 2mm) with exposed thermal pad (Pin 9, GND). The package requires soldering of the exposed pad to PCB ground for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN (Pin 1) | Chip enable input with built-in comparator | Drives <0.3V to disable (0μA IQ); >1.45V to enable; 60mV hysteresis prevents chatter near threshold. |
| VCC (Pin 2) | Main input supply connection | Must be locally bypassed to GND; powers internal circuitry and NPN switch base drive. |
| GND (Pin 3) | Power and signal reference ground | Tie directly to local ground plane; connects to exposed pad (Pin 9) for thermal and EMI control. |
| SW (Pin 4) | Collector of internal NPN power switch | High dV/dt node; trace area must be minimized to reduce EMI radiation and switching losses. |
| VOUT (Pin 5) | Drain of output disconnect PMOS | Delivers regulated output; bypass capacitor required to ground for transient stability and noise filtering. |
| CAP (Pin 6) | Cathode of internal Schottky diode | Connects to inductor and output capacitor; lower impedance path than VOUT for higher efficiency when load is connected here. |
| VREF (Pin 7) | 1.235V precision reference output | Supplies 10μA current source for soft-start; capacitor here controls VOUT ramp rate and limits inrush current. |
| FBP (Pin 8) | Positive input of error amplifier | Sets output voltage via VOUT = 31.85 × VFBP; accepts resistor divider from VREF or external reference. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 8.5μA active / 0μA shutdown enables >10-year battery life in energy-harvesting sensor nodes. |
| Integrated output disconnect | PMOS switch isolates load from input during shutdown, preventing backfeed and enabling true zero-power sleep states. |
| Adjustable output via FBP pin | VOUT = 31.85 × VFBP allows precise, externally programmable regulation from ~4V to 40V using standard resistor values. |
| Internal high-value feedback divider | 12.4MΩ/0.4MΩ ratio reduces input-referred quiescent current and eliminates two external resistors in basic configurations. |
| Overvoltage protection | Hardware clamping limits CAP and VOUT to ≤40V, protecting downstream circuitry even if FBP is overdriven. |
| Soft-start via VREF capacitor | 70μs discharge + 10μA charge cycle ensures controlled VOUT ramp, eliminating inrush-induced stress on capacitors and switches. |
Applications
| Sensor Power Supply | RF MEMS Relay Bias |
|---|---|
|
Use Scenario: Powering ultra-low-current analog sensors (e.g., gas, humidity, temperature) in battery-operated IoT edge nodes requiring multi-year operation. IC Role / Device Role / Timing Role: Boost converter providing stable 3.3V–12V bias from depleted 1.8V–3.6V primary cells, with output disconnect during MCU sleep cycles. Use Value: 8.5μA IQ and 0μA shutdown current extend coin-cell lifetime beyond 5 years; integrated disconnect eliminates need for external load switch. |
Use Scenario: Generating 24V–40V bias for RF MEMS relay actuation in reconfigurable antenna systems and test instrumentation. IC Role / Device Role / Timing Role: High-voltage, low-noise DC-DC stage delivering fast, glitch-free turn-on/off pulses synchronized to RF switching events. Use Value: Low-noise control scheme minimizes switching artifacts near RF bands; 40V absolute max rating safely covers 36V relay hold requirements. |
| General-Purpose Precision Bias | Capacitor Charging Circuit |
|
Use Scenario: Providing adjustable, low-drift bias voltage for op-amp references, DAC buffers, or photodiode transimpedance amplifiers in portable medical devices. IC Role / Device Role / Timing Role: Programmable voltage source with 1.235V reference and 31.85× gain, supporting outputs from 4V to 40V via resistor divider or external reference injection at FBP. Use Value: ±1.2% VREF accuracy and <0.01%/V line regulation ensure stable bias under varying input conditions; no external reference needed. |
Use Scenario: Charging high-value storage capacitors (e.g., 10,000µF) in pulsed-power applications such as laser drivers or flash circuits. IC Role / Device Role / Timing Role: Controlled-current charger using SW current limit and soft-start to manage inrush; CAP node connection minimizes conduction loss. Use Value: 25mA switch limit and 150ns minimum off-time allow predictable charge timing; integrated Schottky avoids external diode losses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3464EDD#TRMPBF | Higher IQ (25μA), lower max VIN (10V), PNP-based disconnect, ThinSOT-6 package | Better suited for sub-10V input systems with moderate output current (≤85mA); lacks output disconnect PMOS and integrated feedback divider | Select LT3464EDD#TRMPBF only when input is ≤10V and board space favors ThinSOT; LT8410EDC#TRMPBF preferred for wider input range and lower IQ. |
| LT1946AEMS#TRPBF | Higher switch current (1.5A), fixed 1.2MHz/2.7MHz frequency, MSOP-8 package, no output disconnect | Targets higher-power applications (e.g., LCD bias, white LED drivers); requires external MOSFET for disconnect and lacks shutdown IQ = 0μA | Choose LT1946AEMS#TRPBF for >100mA output needs; LT8410EDC#TRMPBF remains optimal for micropower, isolated-bias use cases. |
Compared with LT3464EDD#TRMPBF and LT1946AEMS#TRPBF, the LT8410EDC#TRMPBF uniquely combines ultralow quiescent current, integrated output disconnect, and high-voltage capability in a 2mm × 2mm footprint-making it irreplaceable for battery-critical, high-isolation sensor and RF bias applications.
Availability
LT8410EDC#TRMPBF is available at Aetrix Electronics and suitable for sensor power, RF MEMS relay bias, and general-purpose precision bias applications requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to 125°C.
Supply support for LT8410EDC#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT8410EDC#TRMPBF belongs to Linear Technology's ultralow-power DC/DC converter product line, designed specifically for energy-constrained applications including wireless sensor networks, portable instrumentation, and always-on IoT endpoints.
FAQ
What is the maximum output voltage supported by the LT8410EDC#TRMPBF?
The LT8410EDC#TRMPBF supports a maximum output voltage of 40V, enforced by internal overvoltage protection circuitry on both the CAP and VOUT pins. Even if the FBP pin voltage is driven above the 1.235V reference, the output will clamp at 40V. This hard limit protects downstream components and ensures safe operation in high-voltage bias applications like RF MEMS relays.
How does the LT8410EDC#TRMPBF achieve 0μA quiescent current in shutdown mode?
The LT8410EDC#TRMPBF achieves 0μA quiescent current in shutdown by fully disabling all internal circuitry-including the reference, error amplifier, and oscillator-when the SHDN pin voltage drops below 0.3V. Unlike many boost converters that retain leakage paths, this part cuts all supply currents to zero, making it ideal for multi-year battery operation in intermittent-sensing applications.
Can the LT8410EDC#TRMPBF be used with input voltages below 2.5V?
No-the LT8410EDC#TRMPBF has a minimum operating input voltage of 2.5V, as specified in its Absolute Maximum Ratings and Electrical Characteristics tables. Operation below this threshold is not guaranteed and may result in failure to start, unstable regulation, or undefined behavior. For sub-2.5V inputs, alternative solutions such as the LTC3525 or discrete low-VGS MOSFET-based topologies should be considered.
What is the purpose of the exposed pad (Pin 9) on the LT8410EDC#TRMPBF DFN package?
The exposed pad (Pin 9) on the LT8410EDC#TRMPBF is electrically connected to GND and serves dual thermal and EMI functions. It must be soldered to a PCB ground plane to dissipate heat from the internal NPN switch and Schottky diode, and to provide a low-inductance return path for high-frequency switching currents. Omitting this connection degrades thermal performance and increases radiated emissions.
How is output voltage set on the LT8410EDC#TRMPBF, and what is the role of the FBP pin?
The LT8410EDC#TRMPBF sets output voltage via the FBP (Feedback Positive) pin using the relationship VOUT = 31.85 × VFBP. The FBP pin is the positive input of the internal error amplifier; applying a voltage here-typically via a resistor divider from the 1.235V VREF pin-directly programs the regulated output. This architecture enables precise, externally adjustable outputs from ~4V to 40V without trimming or calibration.
LT8410EDC#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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):
- 2.5V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.235V
- Voltage - Output (Max):
- 40V (Switch)
- Current - Output:
- 20mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LT8410EDC#TRMPBF FAQ
1.How can I place an order for LT8410EDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8410EDC#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 LT8410EDC#TRMPBF reliable?
The price and inventory of LT8410EDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8410EDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8410EDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8410EDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8410EDC#TRMPBF?
LT8410EDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8410EDC#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 LT8410EDC#TRMPBF?
For technical support, including LT8410EDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8410EDC#TRMPBF requirements.
6.How does Aetrix verify that LT8410EDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8410EDC#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 LT8410EDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8410EDC#TRMPBF?
All LT8410EDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8410EDC#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 LT8410EDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT8410EDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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