spx2954am3-l-5-0-tr Exar Corporation, spx2954am3-l-5-0-tr Datasheet - Page 3

• Manufacturer Part Number: spx2954am3-l-5-0-tr
• Description: 250ma Low Dropout Voltage Regulator
• Manufacturer: Exar Corporation

ELECTRICAL CHARACTERISTICS (Cont.)
Date: 12/9/05
N
N
N
N
N
N
N
N
TO-92-3
SOT-223
TO-220-3
OTE
OTE
OTE
OTE
OTE
OTE
OTE
OTE
Thermal Resistance Θ Θ Θ Θ Θ
TO-263-3
SOIC-8
PARAMETER
Error Comparator
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage (N
Lower Threshold Voltage (N
Hysteresis
Shutdown
Input logic Voltage
Shutdown Input Current
Regulator Output Current (N
in Shutdown
1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided
2: Unless otherwise specified all limits guaranteed for T
3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle.
4: Line regulation for the SPX2954 is tested at I
5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV
6: V
7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below
8: V
by the total temperature range.
Additional conditions for the 8-pin versions are feedback tied to 5V tap and output tied to output sense
(V
Changes in output voltage due to heating effects are covered under the specification for thermal
regulation.
below its nominal value measured at 1V differential. At very low values of programmed output voltage,
the minimum input supply voltage of 2V (2.3V over temperature) must be taken into account.
the nominal reference voltage measured at 6V input. To express these thresholds in terms of output
voltage change, multiply by the error amplifier gain = V
programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95
mV x 5V/1.235 = 384 mV. Thresholds remain constant as a percent of V
dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.
REF
SHUTDOWN
OUT
≤V
= 5V) and V
OUT
≥ 2V, V
≤ (V
IN
- 1V), 2.3 ≤V
JA
IN
SHUTDOWN
≤ 30V, V
(N
Low (Regulator ON)
CONDITIONS
V
V
I
High (Regulator OFF)
VS = 2.4V
VS= 30V
OL
OH
IN
OTE
OTE
OTE
OTE
= 400µA
= V
= 30V
≤ 0.8V.
7)
7)
7)
8)
SPX2954, 250mA Low Dropout Voltage Regulator
O
OUT
-0.5V,
IN
≤30V, 100µA≤I
=0, Feedback pin tied to 5V/3.3V Tap.
L
L
= 1mA.
3
MIN. TYP.
≤ 250mA, T
2.0
V
40
IN
SPX2954A
=V
O
+1V, I
J
128.4
131.9
0.01
31.4
62.3
29.4
= 25°C, V
150
400
1.3
60
75
15
30
OUT
3
L
=100µA, C
/V
J
≤ T
REF
MAX
250
800
0.7
JMAX
95
50
10
= (R
1
IN
L
= 6V, I
=1µF (
.
1
+ R
NOTE
2.0
MIN. TYP. MAX.
40
L
2
OUT
)/R
= 100µA and C
2), T
as V
2
SPX2954
© Copyright 2005 Sipex Corporation
. For example, at a
A
0.01
150
400
= 25°C, unless otherwise specified.
1.3
60
75
15
30
OUT
3
is varied, with the
250
800
0.7
95
50
10
1
L
= 1µF.
UNIT
°C/W
°C/W
°C/W
°C/W
°C/W
mV
mV
mV
mV
µA
µA
µA
V