TS2950-51 series

3-6

2003/12 rev. B

TS2951/A Electrical Characteristics

(continues)

(Vin= 15V, Ta= 25

Parameter

Test Conditions (note 2)

Min

Typ

Max

Unit

Feedback Pin Bias Current

--

20

40

nA

Reference Voltage Temperature

Coefficient

(Note 7)

--

20

--

ppm/

Feedback Pin Bias Current

Temperature Coefficient

--

0.1

--

nA/

Error Comparator

Output Leakage Current

--

0.01

1

uA

Output Low Voltage

--

150

250

mV

Upper Threshold Voltage

(Note 8)

40

60

--

mV

Power Threshold Voltage

(Note 8)

--

75

95

mV

Hysteresis

(Note 8)

--

15

--

mV

Shutdown Input

Output Logic Voltage

Low (Regulator ON)

High(Regulator OFF)

--

2.0

1.3

1.3

0.7

--

V

Shut down Pin Current

Vs = 2.4V

Vs = 30V

--

30

450

50

600

uA

Regulator Output Current in

Shutdown

(Note 9)

--

3

10

uA

Note 1: Output voltage temperature coefficients defined as the worst case voltage change divided by the total

temperature range.

conditions for the 8-pin versions are feedback tied to 5V, 3.3V & 3V tap output Sense (Vout = 5V, 3.3V & 3V) and

Vshutdown

≤ 0.8V.

Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in

output voltage due to heating effects are covered under the specification for thermal regulation.

Note 4: Line regulation for the TS2951 is tested at 85

guaranteed by design to 0.2%.

Note 5: Dropout Voltage is defined as the input to output differential at which the output voltage drops 100mV below its

nominal value measured at 1V differential at very low value of programmed output voltage, the minimum input

supply voltage of 2V (2.3V over temperature) must be taken in to account.

Note 6: Vref

Note 7: reference voltage temperature coefficient is defined as the worst case voltage change divided by the total

temperature range.

Note 8: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the

nominal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change,

multiply by the error amplifier gain= Vout / Vref = (R1+R2) / R2. For example, at a programmed output voltage of

5V, the Error output is guaranteed to go low when the output drops by 95 mV X 5V / 1.250 = 384mV. Thresholds

remain constant as a percent of Vout as Vout is varied with the dropout warning occurring at typically 5% below

nominal, 7.5% guaranteed.