Micrel, Inc.

MIC2954

September 2007

6

M9999-090607

Notes:

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

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

3. Devices are ESD sensitive. Handling precautions recommended.

(See “Application Information: Thermal Calculation”).

6. Output voltage temperature coefficient is defined as the worst case voltage change divide by the total temperature range.

See “Typical Characteristics” for line regulation versus temperature and load current.

8. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Changes in output voltage due to heating effects are

covered by the thermal regulation specification.

9. Dropout Voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V

differential. At very low values of programmed output voltage, the minimum input supply voltage of 2 V (2.3V over temperature) must be taken into

account.

10. Ground pin current is the regulator quiescent current. The total current drawn from the source is the sum of the load current plus the ground pin

current.

voltage.

12. 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

14. Comparator thresholds are expressed in terms of a voltage differential at the FB pin below the nominal reference voltage measured at 6Vinput. To

programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95mV × 5V/1.235V = 384mV. Thresholds

16. When used in dual supply systems where the regulator load is returned to a negative supply, the output voltage must be diode clamped to ground.

17. Maximum positive supply voltage of 60V must be of limited duration (<10ms) and duty cycle (<1%). The maximum continuous supply voltage is 30V.