1 Features
• A newer version of this device is now available:
BUF634A
• High output current: 250mA
• Slew rate: 2000V/μs
• Pin-selected bandwidth: 30MHz to 180MHz
• Low quiescent current: 1.5mA (30MHz BW)
• Wide supply range: ±2.25V to ±18V
• Internal current limit
• Thermal shutdown protection
• Packages:
– 5-pin SOIC
– 5-pin TO-220
– 5-pin TO-263 surface-mount

2 Applications
• Valve driver
• Solenoid driver
• Op amp current booster
• Line driver
• Headphone driver
• Video driver
• Motor driver
• Test equipment
• ATE pin driver

3 Description
The BUF634 is a high-speed, unity-gain, open-loop
buffer recommended for a wide range of applications.
The BUF634 can be used inside the feedback loop of
op amps to increase output current, eliminate thermal
feedback, and improve capacitive load drive.
For low-power applications, the BUF634 operates
on 1.5mA quiescent current with 250mA output,
2000V/μs slew rate, and 30MHz bandwidth.
Bandwidth can be adjusted from 30MHz to 180MHz
by connecting a resistor between V– and the BW pin.
Output circuitry is fully protected by internal current
limit and thermal shutdown, making the device rugged
and easy to use.
The BUF634 is available in a variety of packages to
meet mechanical and power-dissipation requirements.
Types include SOIC‑8 surface-mount, 5‑lead TO‑220,
and a 5‑lead TO‑263 (DDPAK) surface-mount plastic
power packages.