Analog Devices Inc. LT1010CT#PBF

Overview

LT1010CT#PBF from Analog Devices (formerly Linear Technology) is a fast ±150mA unity-gain power buffer IC designed to boost op amp output drive, isolate capacitive loads, and drive 75Ω video lines or small motors. It delivers 20MHz bandwidth, 75V/µs slew rate, and operates from single supply ≥4.5V or dual supplies up to ±22V.

For engineers reviewing the LT1010CT#PBF datasheet, LT1010CT#PBF pinout, LT1010CT#PBF application, or LT1010CT#PBF equivalent, this page provides verified package mapping (5-lead plastic TO-220), thermal resistance (θ_JA = 50°C/W), current-limiting behavior, distortion performance at 10kHz, and real-world stability guidance for capacitive load isolation.

Technical Context

The LT1010CT#PBF integrates a high-speed output stage with internal current and thermal limiting, enabling robust operation into reactive loads without foldback limiting. Its bias terminal allows quiescent current adjustment via external resistor to improve slew symmetry and reduce negative-slew glitching.

Designed for placement inside or outside an op amp's feedback loop, it features low output resistance (≤12Ω) independent of load current, stable operation with >1µF capacitive loads, and rail-to-rail negative swing capability-critical for single-supply precision buffering and video line driving.

Key Specifications

Pinout & Package

LT1010CT#PBF is housed in a 5-lead plastic TO-220 package with exposed V– tab for thermal conduction. Pin 3 (OUTPUT) carries full load current; Pin 5 (INPUT) accepts buffered op amp output; Pin 1 (V+) and Pin 4 (V–) are power rails; Pin 2 (BIAS) sets quiescent current via resistor to V+.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power buffer applications.

Compared with LM6364M/NOPB and THS3091D, the LT1010CT#PBF uniquely combines ±150mA drive, built-in thermal/current protection, BIAS-adjustable quiescent current, and proven stability with >1µF capacitive loads-making it the only choice for robust, maintenance-free op amp output boosting in industrial and broadcast systems.

Availability

LT1010CT#PBF is available at Aetrix Electronics and suitable for video amplifiers, audio power stages, operational power supplies, and FET driver circuits requiring stable component supply across extended temperature ranges (0°C to 100°C).

Supply support for LT1010CT#PBF 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, documentation, and manufacturing continuity for legacy Linear parts including the LT1010 series.

The LT1010 product line was engineered specifically for high-fidelity analog signal conditioning-emphasizing capacitive load immunity, rail-to-rail output swing, and seamless integration with precision op amps in test equipment, medical imaging, and broadcast infrastructure.

FAQ

What is the maximum continuous output current of the LT1010CT#PBF?

The LT1010CT#PBF delivers ±150mA continuous output current under specified thermal conditions (θ_JA = 50°C/W). This rating holds across the full operating temperature range (0°C to 100°C) and is enforced by internal current limiting that does not fold back-ensuring consistent drive capability even during transient overload events. The LT1010CT#PBF maintains this current into 75Ω loads at ±10V output swing.

Can the LT1010CT#PBF operate from a single 5V supply?

Yes, the LT1010CT#PBF supports single-supply operation down to 4.5V total supply voltage. When powered from 5V (V+ = 5V, V– = 0V), it achieves rail-to-rail negative swing-outputting down to 0V-and delivers usable positive swing up to ~3.9V (accounting for VSOS+ ≈ 1.1V). Input common-mode range extends to within 1.5V of V+, making it compatible with 5V logic-driven op amp stages.

How does the BIAS pin on the LT1010CT#PBF affect performance?

The BIAS pin on the LT1010CT#PBF controls quiescent current: connecting a resistor (e.g., 20Ω) from BIAS to V+ raises I_Q from 5mA to ~40mA, improving negative slew rate symmetry and reducing glitching during fast falling edges. This adjustment also lowers output impedance and THD at high frequencies but increases thermal dissipation-requiring appropriate heatsinking in the TO-220 package.

Is the LT1010CT#PBF suitable for driving long coaxial cables?

Yes, the LT1010CT#PBF is explicitly validated for driving long cables, including 75Ω video lines. Its ability to drive >1µF capacitive loads while remaining stable-combined with 75V/µs slew rate and low output impedance-prevents reflections and ringing. For unterminated lines, adding a 50Ω series resistor at the output (as recommended in Linear's Application Note 1010 AI09) further improves impedance matching without compromising bandwidth.

What thermal considerations apply to the LT1010CT#PBF in TO-220 package?

The LT1010CT#PBF in 5-lead plastic TO-220 has θ_JA = 50°C/W (still air) and θ_JC = 3°C/W when the exposed V– tab is soldered to ≥1in² of 1oz copper. At 1W dissipation, junction temperature rise is ~50°C above ambient-well within the 125°C max rating. For sustained >1W operation, a small aluminum heatsink or thermal pad is recommended; derating begins above 100°C case temperature.