APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

FEATURES

• WIDE SUPPLY RANGE —

±15V to ±150V

• HIGH OUTPUT CURRENT —

1.5A Continuous (PB58)

2.0A Continuous (PB58A)

• VOLTAGE AND CURRENT GAIN

• HIGH SLEW — 50V/

µs Minimum (PB58)

75V/

µs Minimum (PB58A)

• PROGRAMMABLE OUTPUT CURRENT LIMIT

• HIGH POWER BANDWIDTH — 320 kHz Minimum

• LOW QUIESCENT CURRENT — 12mA Typical

• EVALUATION KIT — See EK50

APPLICATIONS

• HIGH VOLTAGE INSTRUMENTATION

• Electrostatic TRANSDUCERS & DEFLECTION

• Programmable Power Supplies Up to 280V p-p

DESCRIPTION

The PB58 is a high voltage, high current amplifier designed

to provide voltage and current gain for a small signal, general

purpose op amp. Including the power booster within the feed-

back loop of the driver amplifier results in a composite amplifier

with the accuracy of the driver and the extended output voltage

range and current capability of the booster. The PB58 can also

be used without a driver in some applications, requiring only an

external current limit resistor to function properly.

The output stage utilizes complementary MOSFETs, provid-

ing symmetrical output impedance and eliminating second

breakdown limitations imposed by Bipolar Transistors. Internal

feedback and gainset resistors are provided for a pin-strapable

gain of 3. Additional gain can be achieved with a single external

resistor. Compensation is not required for most driver/gain

configurations, but can be accomplished with a single external

capacitor. Enormous flexibility is provided through the choice of

driver amplifier, current limit, supply voltage, voltage gain, and

compensation.

This hybrid circuit utilizes a beryllia (BeO) substrate, thick film

resistors, ceramic capacitors and semiconductor chips to maxi-

mize reliability, minimize size and give top performance.

Ultrasonically bonded aluminum wires provide reliable inter-

connections at all operating temperatures. The 8-pin TO-3

package is electrically isolated and hermetically sealed using

one-shot resistance welding. The use of compressible isolation

washers voids the warranty.

TYPICAL APPLICATION

Figure 1. Inverting

composite amplifier.

OP

AMP

PB58

+15V

–15V

IN

COM

+Vs

–Vs

OUT

1

2

3

4

5

6

7

8

TOP VIEW

CL

+Vs

IN

COM

–Vs

GAIN

COMP

OUT

R

CL

EQUIVALENT SCHEMATIC

EXTERNAL CONNECTIONS

3

1

2

6

8

5

4

7

IN

GAIN

COM

COMP

Q1

Q4

Q2

Q3

Q5

Q6

Q7

Q8

Q10

Q9

+Vs

OUT

CL

–Vs

Q11

6.2K

50K

3.1K

HTTP://WWW.APEXMICROTECH.COM

(800) 546-APEX

(800) 546-2739

MICROTECHNOLOGY

POWER BOOSTER AMPLIFIERS

PB58 • PB58A