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Analog Devices Inc. LT3009ESC8-2.5#TRPBF
- Part No.:
- LT3009ESC8-2.5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-VFSOP (0.049", 1.25mm Width)
- Datasheet:
-
LT3009ESC8-2.5#TRPBF.pdf
- Description:
- IC REG LINEAR 2.5V 20MA SC70-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,432
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Product details
Overview
LT3009ESC8-2.5#TRPBF from Analog Devices (formerly Linear Technology) is a fixed-output 2.5V, 20mA micropower low dropout linear regulator in an 8-lead SC70 package. It delivers ultralow quiescent current (3μA), 280mV dropout at 20mA, ±2% output tolerance over load/line/temperature, and reverse-battery protection - ideal for battery-powered utility meters and hotel door locks requiring long standby life.
For engineers reviewing the LT3009ESC8-2.5#TRPBF datasheet, LT3009ESC8-2.5#TRPBF pinout, LT3009ESC8-2.5#TRPBF application, or LT3009ESC8-2.5#TRPBF equivalent, key selection criteria include shutdown current (<1μA), stability with 1μF ceramic output capacitors, input voltage range (1.6V–20V), and SC70 thermal performance (θJA = 75°C/W to 95°C/W).
Technical Context
The LT3009ESC8-2.5#TRPBF uses a PNP pass transistor architecture enabling low dropout and minimal ground current rise with load - GND pin current stays below 5% of output current up to 20mA. Its internal reference is trimmed to 600mV, supporting fixed 2.5V output via on-chip resistor divider.
It integrates reverse-battery protection, thermal limiting, and current limiting without external components. Shutdown is controlled by a logic-compatible SHDN pin that reduces quiescent current to <1μA while maintaining reverse-current blocking capability at the OUT pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±2% over full load (1μA–20mA), line (3V–20V), and temperature (–40°C to 125°C) range - ensures stable MCU core or sensor bias supply. |
| Dropout Voltage | 280mV at 20mA load - enables regulation from 2.78V input, critical for single-cell Li-ion or two-cell alkaline systems. |
| Quiescent Current | 3μA typical at no load - extends battery life in keep-alive applications beyond 10 years with a 220mAh coin cell. |
| Shutdown Current | <1μA at VSHDN = 0V - supports ultra-low-power wake-on-event architectures without leakage penalties. |
| Input Voltage Range | 1.6V to 20V - accommodates wide-source inputs including unregulated wall adapters, automotive transients, and multi-cell batteries. |
| Output Capacitor | Stable with ≥1μF ceramic capacitor (ESR ≤3Ω) - eliminates need for tantalum or electrolytic, reducing BOM cost and board area. |
| Ripple Rejection | 52dB at 120Hz (VIN–VOUT = 1.5V, 0.5VP-P) - suppresses AC ripple from switching pre-regulators feeding sensitive analog circuitry. |
Pinout & Package
LT3009ESC8-2.5#TRPBF is housed in an 8-lead plastic SC70 package (2.0mm × 2.1mm × 0.9mm), optimized for space-constrained portable designs. The exposed pad is not present in SC70; thermal dissipation relies on PCB copper and θJA = 75°C/W (min) to 95°C/W (max).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SHDN | Active-low shutdown control; must be tied to VIN if unused; drives output off and reduces IQ to <1μA. |
| 2 | GND | Power ground reference for regulator and feedback network; connects internally to all ground terminals. |
| 3 | GND | Secondary ground connection - improves thermal conduction and reduces ground impedance in high-noise environments. |
| 4 | IN | Main power input; withstands reverse voltage up to –22V relative to GND - protects against battery reversal. |
| 5 | NC | No-connect; not bonded internally; may be left floating, tied to GND, or tied to VIN per layout requirements. |
| 6 | OUT | Regulated 2.5V output; reverse-current protected - prevents backfeed when load voltage exceeds 2.5V. |
| 7 | NC | No-connect; not bonded internally; electrically isolated from die - no routing or soldering required. |
| 8 | NC | No-connect; not bonded internally; serves as mechanical anchor only - no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 3μA typical no-load IQ enables >10-year battery life in 220mAh coin-cell applications like smart locks. |
| Reverse-battery protection | Withstands –22V on IN pin without damage or reverse current - eliminates need for external series diode. |
| Reverse-output current blocking | Blocks reverse current flow from OUT to GND when VOUT < 0V (down to –22V) - protects downstream circuitry during negative transients. |
| Thermal and current limiting | Internal foldback current limit and thermal shutdown prevent destruction under overload or poor heatsinking. |
| SC70 footprint compatibility | Standard 8-lead SC70 package enables drop-in replacement in space-limited designs previously using SOT-23-5 or SC70-5 regulators. |
Applications
| Utility Meters | Hotel Door Locks |
|---|---|
|
Use Scenario: Long-life, tamper-resistant metering unit powered by primary lithium battery with 15+ year field life requirement. IC Role / Device Role / Timing Role: Primary 2.5V supply for metrology ADC, real-time clock, and secure microcontroller in always-on mode. Use Value: 3μA quiescent current and <1μA shutdown current minimize self-discharge, directly extending battery service interval beyond specification. |
Use Scenario: Battery-powered electronic lock with wake-on-RFID and low-power BLE interface. IC Role / Device Role / Timing Role: Standby power rail for secure MCU and RF transceiver during sleep; enables fast wake-up from sub-μA state. Use Value: SC70 package fits tight mechanical envelopes; reverse-battery protection prevents failure during user-replaceable battery swaps. |
| Remote Monitoring Sensors | Low-Power IoT Edge Nodes |
|
Use Scenario: Solar-charged environmental sensor node deployed in remote locations with intermittent light exposure. IC Role / Device Role / Timing Role: Stable 2.5V bias for precision temperature/humidity sensors and low-power MCU during deep-sleep cycles. Use Value: 1μF ceramic stability allows use of small, reliable, high-temperature MLCCs - no electrolytic aging or ESR drift concerns. |
Use Scenario: Cellular/NB-IoT edge node transmitting infrequent telemetry bursts from AA/AAA battery source. IC Role / Device Role / Timing Role: Main system supply regulating energy harvested or stored in supercapacitor/battery hybrid. Use Value: 280mV dropout at 20mA enables efficient utilization of declining battery voltage down to 2.78V - maximizes usable capacity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2502E/MB | 2.5V fixed, 250mA output, 6μA IQ, SOT-23-5 package - higher current but 2× quiescent current and larger footprint. | Designed for higher-load industrial sensors; lacks reverse-battery protection and SC70 size advantage. | Select when >20mA load current or higher thermal margin is required; avoid where board space or battery life are constrained. |
| TNIV50250M | 2.5V fixed, 150mA, 2.5μA IQ, X2-DFN1010-4 package - lower IQ but only 4-pin DFN, no shutdown, no reverse protection. | Targeted at cost-sensitive consumer wearables; missing SHDN control and fault protections critical for industrial reliability. | Consider only for non-critical, high-volume consumer products where shutdown and reverse protection are omitted from system design. |
Compared with MCP1703T-2502E/MB and TNIV50250M, LT3009ESC8-2.5#TRPBF uniquely combines SC70 size, 3μA IQ, integrated shutdown, and full reverse-battery/reverse-output protection - making it the only option meeting simultaneous constraints of ultra-low power, miniature footprint, and robust fault handling in mission-critical battery systems.
Availability
LT3009ESC8-2.5#TRPBF is available at Aetrix Electronics and suitable for utility metering, smart access control, remote sensing, and low-power IoT edge nodes requiring stable component supply across extended product lifecycles.
Supply support for LT3009ESC8-2.5#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 its legacy of high-performance analog ICs, emphasizing precision, power efficiency, and reliability for demanding industrial and automotive applications.
The LT3009 series was designed specifically for ultralow-power, battery-backed systems requiring long-term stability, reverse fault protection, and minimal board area - targeting utility infrastructure, security hardware, and remote monitoring.
FAQ
What is the maximum input voltage rating for LT3009ESC8-2.5#TRPBF?
The absolute maximum input voltage for LT3009ESC8-2.5#TRPBF is ±22V on the IN pin relative to GND. Operation is specified from 1.6V to 20V, and the device includes reverse-battery protection that blocks current flow and prevents damage when IN is driven negative up to –22V - a key feature distinguishing LT3009ESC8-2.5#TRPBF from standard LDOs.
Does LT3009ESC8-2.5#TRPBF require an external shutdown pull-up resistor?
No, LT3009ESC8-2.5#TRPBF does not require an external pull-up on the SHDN pin. If unused, the SHDN pin must be tied directly to VIN to ensure normal operation. Driving SHDN low (≤0.36V) disables the output and reduces quiescent current to <1μA; the pin is not compatible with negative-rail referenced logic.
Can LT3009ESC8-2.5#TRPBF operate with a 1μF ceramic output capacitor?
Yes, LT3009ESC8-2.5#TRPBF is explicitly characterized and guaranteed stable with a minimum 1μF ceramic output capacitor having ESR ≤3Ω. This eliminates reliance on higher-ESR tantalum or aluminum electrolytic capacitors - reducing cost, size, and aging-related drift in long-life applications like utility meters.
What is the output voltage tolerance of LT3009ESC8-2.5#TRPBF over temperature and load?
LT3009ESC8-2.5#TRPBF guarantees ±2% output voltage tolerance across the full operating junction temperature range (–40°C to 125°C), load current (1μA to 20mA), and line (3V to 20V input). This is confirmed in the Electrical Characteristics table for LT3009-2.5 under "Regulated Output Voltage" with min/typ/max values of 2.475V/2.5V/2.525V at 100μA load and 3V–20V input.
How does LT3009ESC8-2.5#TRPBF handle reverse current from the output?
LT3009ESC8-2.5#TRPBF provides reverse-current protection: when the output voltage falls below ground (e.g., due to external pull-down), reverse current from OUT to GND is limited to ≤10μA (typical 0.6μA at VOUT = 1.2V, VIN = 0). This prevents backfeeding into the regulator and protects upstream sources such as batteries or supercapacitors.
LT3009ESC8-2.5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-VFSOP (0.049", 1.25mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.45V @ 20mA
- Current - Output:
- 20mA
- Current - Quiescent (Iq):
- 6 µA
- Current - Supply (Max):
- 1 mA
- PSRR:
- 63dB (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:
- SC-70-8
LT3009ESC8-2.5#TRPBF FAQ
1.How can I place an order for LT3009ESC8-2.5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3009ESC8-2.5#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 LT3009ESC8-2.5#TRPBF reliable?
The price and inventory of LT3009ESC8-2.5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3009ESC8-2.5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3009ESC8-2.5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3009ESC8-2.5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3009ESC8-2.5#TRPBF?
LT3009ESC8-2.5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3009ESC8-2.5#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 LT3009ESC8-2.5#TRPBF?
For technical support, including LT3009ESC8-2.5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3009ESC8-2.5#TRPBF requirements.
6.How does Aetrix verify that LT3009ESC8-2.5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3009ESC8-2.5#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 LT3009ESC8-2.5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3009ESC8-2.5#TRPBF?
All LT3009ESC8-2.5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3009ESC8-2.5#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 LT3009ESC8-2.5#TRPBF part is unused and in its original packaging.
Return procedure for LT3009ESC8-2.5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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