TS9009 series

3-5

2003/12 rev. B

Electrical Characteristics

Note 1: Exceeding the absolute maximum rating may damage the device.

Note 2: The device is not guaranteed to function outside its operating rating.

Note 3: The maximum allowable power dissipation at any Ta is Pd(max) = [ Tj(max) - Ta] * Өja. Exceeding the

maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into

thermal shutdown.

Note 4: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total

temperature range.

Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for

load regulation in the load range from 1mA to 80mA. Changes in output voltage due to heating effects are

covered by the thermal regulation specification.

Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its

nominal value measured at 1V differential.

Note 7: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn

from the supply is the sum of the load current plus the ground pin current.

Note 8: Thermal regulation is defined as the change in output voltage at a time “t” after a change in power dissipation is

applied, excluding load or line regulation effects. Specifications are for a 80mA load pulse at Vin=16V for

t=10mS.

Applications Information

Input Capacitor

Place an 0.1uF capacitor from Vin to Gnd in applications where there is more than 10 inches of wire between the input

and the AC filter capacitor, or where a battery is used as the input.

Output Capacitor

As with any PNP-based regulator, the TS9009 requires an output capacitor to prevent oscillation. However, the TS9009

is extremely stable, and requires only 0.47uF of output capacitance for stability. It can be used with any type of

capacitor, but it works great with cheap, tiny ceramic capacitors, it also can be increased the output capacitor value

without limit to improve transient response.

dielectrics have poor temperature coefficients, which affect the capacitance value over temperature. Tantalum

capacitors are very stable over temperature, but are larger and much more expensive. Aluminum electrolytic capacitors

also work, but they have electrolytes which freeze at –30

below -25

No Load Stability

Unlike most regulators, the TS9009 will remain stable and in regulation with no load other than the internal voltage

divider. The makes TS9009 ideal for CMOS RAM keep alive applications.

Enable Input

The Ts9009 have practically zero off-mode current. When the chip enable input (CE) is held below 0.6V, the TS9009 is

powered off. Pulling CE high over 2V will be turned on the regulation. When the CE is held low, the regulator typically

draws only 15nA of current. While the logic threshold is TTL/CMOS compatible, CE may be pulled as high as 20V,

independent to Vin.