LM2927T datasheet(3/10 Pages) NSC

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Electrical Characteristics (Continued)

IN = 14.4V, CO = 10 µF, −40˚C ≤ TJ ≤ 125˚C, unless otherwise specified.

Parameter

Conditions

Typ

Limit

Units

(Note 4)

(Note 5)

(Limit)

REGULATOR OUTPUT

Maximum Operational Input

Voltage

Continuous

V (min)

Peak Transient Input Voltage

O ≤ 7V, RL = 100Ω,tf = 100 ms

V (min)

Reverse DC Input Voltage

O ≥ −0.6V, RL = 100Ω

−18

V (min)

Reverse Transient Input Voltage

r = 1 ms, RL = 100Ω

−50

V (min)

RESET OUTPUT

Threshold

∆V

O Required for Reset Condition (Note 7)

−80

mV (min)

−250

−400

mV (max)

Output Low Voltage

SINK = 1.6 mA, VIN = 3.2V

0.15

0.4

V (max)

Internal Pull-Up Resistance

Ω

Delay Time

DELAY = 10 nF (See Timing Curve)

Minimum Operational V

Delayed Reset Output

≤ 0.8V,

2.2

on Power Up

SINK = 1.6 mA, RL = 100Ω

3.2

V (min)

Minimum Operational V

Delay Reset Output

≤ 0.8V,

0.7

on Power Down

SINK = 10 µA, VIN = 0V

DELAY CAPACITOR PIN

Threshold Difference (

∆V

DELAY)

Change in Delay Capacitor Voltage Required

3.5

V (min)

for Reset Output to Return High

3.75

4.1

V (max)

Charging Current (I

DELAY)

1.0

µA (min)

2.0

µA

3.0

µA (max)

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in-

tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.

Note 2: Human body model; 100 pF discharged through a 1.5 k

Ω resistor.

Note 3: The maximum power dissipation is a function of TJMAX, and θJA, and TA, and is limited by thermal shutdown. The maximum allowable power dissipation at

any ambient temperature is PD = (TJMAX–TA)/θJA. If this dissipation is exceeded, the die temperature will rise above 150˚C and the device will go into thermal shut-

down. For the LM2926 and LM2927, the junction-to-ambient thermal resistance is 53˚C/W, and the junction-to-case thermal resistance is 3˚C/W.

Note 4: Typicals are at TJ = 25˚C and represent the most likely parametric norm.

Note 5: Limits are 100% guaranteed by production testing.

Note 6: Dropout voltage is the input-output differential at which the circuit ceases to regulate against any further reduction in input voltage. Dropout voltage is mea-

sured when the output voltage (VO) has dropped 100 mV from the nominal value measured at VIN = 14.4V.

Note 7: The reset flag is set LOW when the output voltage has dropped an amount,

∆VO, from the nominal value measured at VIN = 14.4V.

Typical Performance Characteristics

Output Voltage

DS010759-15

Low Voltage Behavior

DS010759-16

Output at Voltage Extremes

DS010759-32

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