4-28

TELCOM SEMICONDUCTOR, INC.

ABSOLUTE MAXIMUM RATINGS*

SOIC ........................................................... 470mW

Operating Temperature Range

C Device .............................................. 0

°C to 70°C

E Device ....................................... – 40

°C to +85°C

Storage Temperature Range ................ – 65

°C to +165°C

Lead Temperature (Soldering, 10 sec) ................. +300

°C

*This is a stress ratings only and functional operation of the device at these

or any other conditions above those indicated in the operational sections of

the specifications is not implied. Exposure to Absolute Maximum Rating

Conditions for extended periods may affect device reliability.

**The output may be shorted to NEGOUT or GND if the package power

dissipation is not exceeded. Typical short circuit current to GND is 50mA.

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

Supply Voltage

Note 1

5

—

10

V

Output Voltage

– 4.3

– 4.1

– 3.9

V

– 4.2

—

– 4

Output Voltage Range

V

Set Voltage

TCM850-852: No Load

– 1.32

– 1.28

– 1.24

V

Supply Current

—

2

3

mA

Shutdown Supply Current

—

0.5

—

µA

TCM851: SHDN = 2V

—

2

—

TCM852: OSC Low

—

0.5

—

—

4

8

mV/mA

—

3

8

TCM850-TCM852

—

2

—

mVp-p

TCM853

—

1

—

Oscillator Frequency

80

100

120

kHz

Input High Voltage

Pin 4

2

—

—

V

Input Low Voltage

Pin 4

—

—

0.5

V

Input Current

Pin 4

—

—

±1

µA

Input Capacitance

Pin 4

—

10

—

pF

NOTES: 1. The supply voltage can drop to 4.5V, but the output is no longer guaranteed to sink 5mA at – 4.1V.

2. The TCM852 will operate with a 50kHz to 250kHz square wave of 40% to 60% duty cycle. For best performance, use an 80kHz to

120kHz square wave with 50% duty cycle.

REGULATED GaAs FET BIAS SUPPLY

TCM850

TCM851

TCM852

TCM853