BUF634 250mA High-Speed Buffer

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• A newer version of this device is now available: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.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

BUF634

D (SOIC, 8)

4.9mm × 6mm

KC (TO-220, 5)

10.16mm × 4.45mm

KTT (TO-263, 5)

10.16mm × 15.24mm

(1)

For more information, see Section 11.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

OPA2810

1 2

Boost the Output Current of any Operational Amplifier

BUF634

SBOS030C – AUGUST 2000 – REVISED MARCH 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.