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Analog Devices Inc. LT3008ITS8-2.5#TRMPBF
- Part No.:
- LT3008ITS8-2.5#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LT3008ITS8-2.5#TRMPBF.pdf
- Description:
- IC REG LINEAR 2.5V 20MA TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,034
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Product details
Overview
LT3008ITS8-2.5#TRMPBF from Analog Devices (formerly Linear Technology) is a fixed-output 2.5V, 20mA low-dropout linear regulator in an 8-lead TSOT-23 package. It delivers ultralow 3μA quiescent current, 300mV dropout at 20mA, ±2% output tolerance over load/line/temperature, and reverse-battery protection - ideal for battery-powered utility meters and remote monitoring nodes requiring multi-year standby life.
For engineers reviewing the LT3008ITS8-2.5#TRMPBF datasheet, LT3008ITS8-2.5#TRMPBF pinout, LT3008ITS8-2.5#TRMPBF application, or LT3008ITS8-2.5#TRMPBF equivalent, key selection criteria include shutdown current (<1μA), minimum 2.2μF ceramic output capacitance, thermal performance in TSOT-23 (θJA = 65–85°C/W), and SENSE pin Kelvin sensing capability for precision regulation at the load.
Technical Context
The LT3008ITS8-2.5#TRMPBF uses a PNP pass transistor architecture enabling low dropout and inherent reverse-battery protection without external diodes. Its error amplifier compares SENSE pin voltage to a 600mV internal reference, delivering tight regulation even with trace resistance between OUT and load.
Stability is achieved with low-ESR ceramic capacitors ≥2.2μF; no series ESR is required. Internal protection includes thermal limit, current limit (22–75mA), reverse-output current blocking (<10μA), and <1μA shutdown current - all critical for unattended industrial sensor nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2% over full load, line, and temperature range - ensures stable MCU core or sensor bias under varying battery discharge. |
| Max Output Current | 20mA continuous - sufficient for ultra-low-power microcontrollers, RTCs, and sub-100μA sensor interfaces. |
| Dropout Voltage | 300mV at 20mA - enables operation down to VIN = 2.8V, extending usable battery range in 3V systems. |
| Quiescent Current | 3μA typical at no load - minimizes self-discharge in keep-alive power supplies for >10-year battery life. |
| Shutdown Current | <1μA - essential for deep-sleep modes in wireless sensor transceivers and metering ICs. |
| Input Voltage Range | 2.0V to 45V - supports wide-input applications including automotive 12V, industrial 24V, and Li-ion/LiFePO₄ battery stacks. |
| Output Noise | 92μVRMS (10Hz–100kHz) - low enough for analog sensor front-ends and precision ADC references. |
Pinout & Package
LT3008ITS8-2.5#TRMPBF is housed in an 8-lead plastic TSOT-23 package (0.65mm pitch, 2.9mm × 1.6mm footprint) with exposed pad not present - thermal path relies on PCB copper area under pins 2, 3, and 4 (GND). Pin 8 is NC and may be floated or tied to GND/VIN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN) | Shutdown control input | Pull ≤0.25V to disable output; draws <1μA in shutdown; must be connected - device does not function if floating. |
| 2, 3, 4 (GND) | Ground return paths | Three dedicated GND pins minimize ground impedance; connect directly to low-impedance PCB ground plane for stability and noise immunity. |
| 5 (IN) | Main power input | Accepts 2.0V–45V; reverse-battery protected - blocks current flow if battery is inserted backward. |
| 6 (OUT) | Regulated output | Delivers 2.5V @ 20mA; requires ≥2.2μF ceramic capacitor at pin for stability; sensitive to PCB trace inductance. |
| 7 (SENSE) | Feedback sense input | Connects to OUT for standard operation; for Kelvin sensing, route to load point to cancel trace IR drop and maintain regulation accuracy. |
| 8 (NC) | No-connect terminal | Not internally connected; may be left floating, tied to GND, or tied to VIN - no electrical effect. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3μA no-load IQ enables >10-year battery life in always-on IoT sensors and smart meters. |
| Reverse-battery protection | Blocks reverse current flow when VIN is negative relative to GND - eliminates need for external series diode and its 0.3–0.7V loss. |
| Kelvin SENSE connection | Compensates for PCB trace resistance between regulator and load, maintaining ±2% regulation at point-of-load. |
| Stable with 2.2μF ceramic cap | Eliminates ESR requirements and simplifies design - avoids tantalum or aluminum electrolytic capacitors with aging and reliability concerns. |
| Thermal and current limiting | Prevents damage during overload or high ambient temperature; allows safe operation in sealed enclosures up to 125°C junction. |
Applications
| Smart Utility Meters | Remote Environmental Sensors |
|---|---|
Use Scenario: Long-life battery-powered electricity/gas/water meters operating unattended for 10+ years in outdoor cabinets. IC Role / Device Role / Timing Role: Primary 2.5V supply for metrology ADC, real-time clock, and RF transceiver during sleep and wake cycles. Use Value: 3μA quiescent current and <1μA shutdown extend CR123A or AA lithium battery life beyond 12 years; reverse-battery protection prevents field failure during battery replacement. | Use Scenario: Wireless soil moisture, temperature, and air quality nodes deployed in agricultural fields or industrial sites with no maintenance access. IC Role / Device Role / Timing Role: Regulated 2.5V rail for low-power MCU, analog sensor interface, and LoRaWAN/Bluetooth LE radio during burst transmission. Use Value: 300mV dropout enables operation down to 2.8V VIN, maximizing energy extraction from single-cell LiFePO₄ batteries; Kelvin SENSE maintains ADC reference accuracy despite long PCB traces. |
| Industrial Keep-Alive Power | Automotive Body Electronics |
Use Scenario: Backup power for volatile memory, configuration registers, and real-time clocks in PLCs and HMIs during main power interruption. IC Role / Device Role / Timing Role: Always-on 2.5V supply sourcing from supercapacitor or backup battery, activated only when main 24V rail fails. Use Value: Reverse-output protection prevents backfeed into failed main supply; <1μA shutdown current minimizes supercapacitor self-discharge, extending hold-up time. | Use Scenario: Low-power subsystems in automotive door modules, seat controllers, or lighting ECUs requiring CAN/LIN bus wake capability. IC Role / Device Role / Timing Role: Secondary 2.5V rail for wake-up logic, EEPROM, and CAN transceiver bias during vehicle sleep mode (S3/S4). Use Value: 45V max input withstands load-dump transients; ±50V absolute max ratings on IN/OUT/SENSE/SHDN ensure robustness in harsh automotive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0525PDBVR | 2.5V fixed, 200mA output, 25μA IQ, 170mV dropout at 20mA, SOT-23-5 package | Higher output current but 8× higher quiescent current - unsuitable for multi-year battery life | Select only if system requires >20mA load or lower dropout; verify thermal derating in TSOT-23 at full load. |
| MCP1700T-2502E/MB | 2.5V fixed, 250mA output, 1.6μA IQ, 600mV dropout at 250mA, SOT-23-3 package | Lower IQ but 2× higher dropout at 20mA (≈400mV) and no SENSE pin - less accurate under trace resistance | Prefer for cost-sensitive, non-Kelvin applications where 400mV dropout is acceptable and load exceeds 20mA. |
Compared with TPS7A0525PDBVR and MCP1700T-2502E/MB, LT3008ITS8-2.5#TRMPBF uniquely balances ultralow IQ (3μA), precise Kelvin sensing, and 300mV dropout in a thermally enhanced TSOT-23 - making it optimal for long-life, high-accuracy, low-current industrial and metering designs where every microamp and millivolt matters.
Availability
LT3008ITS8-2.5#TRMPBF is available at Aetrix Electronics and suitable for smart utility meters, remote environmental sensors, and industrial keep-alive power supplies requiring stable component supply across extended product lifecycles.
Supply support for LT3008ITS8-2.5#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 of high-performance analog ICs for precision power, signal conditioning, and timing.
The LT3008 series was designed specifically for ultralow-power, high-reliability applications in battery-backed instrumentation, remote sensing, and industrial automation - emphasizing quiescent current, reverse protection, and Kelvin sensing over raw output current.
FAQ
What is the maximum input voltage rating for LT3008ITS8-2.5#TRMPBF?
The LT3008ITS8-2.5#TRMPBF has an absolute maximum input voltage of ±50V on the IN pin. Its operational input voltage range is specified from 2.0V to 45V, allowing use in automotive, industrial, and wide-input battery systems while surviving transient overvoltages common in those environments.
Does LT3008ITS8-2.5#TRMPBF require an external resistor divider for 2.5V output?
No. LT3008ITS8-2.5#TRMPBF is a fixed-output variant - the 2.5V regulation is implemented internally. The SENSE pin functions as the feedback node and should be connected directly to the OUT pin for standard operation, or to the load for Kelvin sensing. No external resistors are needed.
Can LT3008ITS8-2.5#TRMPBF be used with a 1μF output capacitor?
No. LT3008ITS8-2.5#TRMPBF requires a minimum 2.2μF ceramic output capacitor for stability. Using 1μF risks oscillation and poor transient response. The datasheet explicitly specifies 2.2μF as the minimum value; larger values (e.g., 4.7–10μF) improve load-step immunity but do not harm stability.
What is the purpose of the NC pin (Pin 8) on LT3008ITS8-2.5#TRMPBF?
Pin 8 on LT3008ITS8-2.5#TRMPBF is a no-connect terminal with no internal connection. It may be left floating, tied to GND, or tied to VIN without affecting device operation. This pin exists for package compatibility and mechanical symmetry - it serves no electrical function in this fixed-output variant.
How does LT3008ITS8-2.5#TRMPBF handle reverse-output conditions?
LT3008ITS8-2.5#TRMPBF blocks reverse current flow from OUT to IN when VOUT > VIN (e.g., during battery backup or load-dump events). Reverse-output current is limited to <10μA, protecting both the regulator and downstream circuitry. This eliminates the need for an external blocking diode in keep-alive or dual-supply configurations.
LT3008ITS8-2.5#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 20mA
- Current - Output:
- 20mA
- Current - Quiescent (Iq):
- 6 µA
- Current - Supply (Max):
- 1.2 mA
- PSRR:
- 61dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
LT3008ITS8-2.5#TRMPBF FAQ
1.How can I place an order for LT3008ITS8-2.5#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3008ITS8-2.5#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 LT3008ITS8-2.5#TRMPBF reliable?
The price and inventory of LT3008ITS8-2.5#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3008ITS8-2.5#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT3008ITS8-2.5#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3008ITS8-2.5#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3008ITS8-2.5#TRMPBF?
LT3008ITS8-2.5#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3008ITS8-2.5#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 LT3008ITS8-2.5#TRMPBF?
For technical support, including LT3008ITS8-2.5#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3008ITS8-2.5#TRMPBF requirements.
6.How does Aetrix verify that LT3008ITS8-2.5#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT3008ITS8-2.5#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 LT3008ITS8-2.5#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT3008ITS8-2.5#TRMPBF?
All LT3008ITS8-2.5#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3008ITS8-2.5#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 LT3008ITS8-2.5#TRMPBF part is unused and in its original packaging.
Return procedure for LT3008ITS8-2.5#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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