Datasheet

LP2951-33-Q1
LP2951-50-Q1
www.ti.com SLVSAW6D –JUNE 2011–REVISED APRIL 2013
RECOMMENDED OPERATING CONDITIONS
MIN MAX UNIT
V
IN
Supply input voltage See
(1)
30 V
T
A
Operating temperature –40 125 °C
(1) Minimum V
IN
is the greater of:
(a) 2 V (25°C), 2.3 V (over temperature), or
(b) V
OUT(MAX)
+ Dropout (Max) at rated I
L
THERMAL INFORMATION
LP2951-xx-Q1
THERMAL METRIC UNIT
DRG 8 PINS
θ
JA
Junction-to-ambient thermal resistance 55.7
θ
JCtop
Junction-to-case (top) thermal resistance 66.5
θ
JB
Junction-to-board thermal resistance 30.2
°C/W
ψ
JT
Junction-to-top characterization parameter 1.1
ψ
JB
Junction-to-board characterization parameter 30.4
θ
JCbot
Junction-to-case (bottom) thermal resistance 10
ELECTRICAL CHARACTERISTICS
V
IN
= V
OUT
(nominal) + 1 V, I
L
= 100 μA, C
L
= 1 μF (5-V versions) or C
L
= 2.2 μF (3.3-V versions),
8-pin version: FEEDBACK tied to V
TAP
, OUTPUT tied to SENSE, V
SHUTDOWN
≤ 0.7 V
PARAMETER TEST CONDITIONS T
A
MIN TYP MAX UNIT
3.3-V VERSION (LP2951-33)
25°C 3.267 3.3 3.333
V
OUT
Output voltage I
L
= 100 μA V
–40°C to 125°C 3.234 3.3 3.366
5-V VERSION (LP2951-50)
25°C 4.950 5 5.050
V
OUT
Output voltage I
L
= 100 μA V
–40°C to 125°C 4.900 5 5.100
ALL VOLTAGE OPTIONS
Output voltage temperature
I
L
= 100 μA –40°C to 125°C 20 100 ppm/°C
coefficient
(1)
25°C 0.03 0.2
Line regulation
(2)
V
IN
= [V
OUT(NOM)
+ 1 V] to 30 V %/V
–40°C to 125°C 0.4
25°C 0.04 0.2
Load regulation
(2)
I
L
= 100 μA to 100 mA %
–40°C to 125°C 0.3
25°C 50 80
I
L
= 100 μA
–40°C to 125°C 150
V
IN
– V
OUT
Dropout voltage
(3)
mV
25°C 380 450
I
L
= 100 mA
–40°C to 125°C 600
25°C 75 120
I
L
= 100 μA μA
–40°C to 125°C 140
I
GND
GND current
25°C 8 12
I
L
= 100 mA mA
–40°C to 125°C 14
25°C 110 170
V
IN
= V
OUT(NOM)
– 0.5 V,
Dropout ground current μA
I
L
= 100 μA
–40°C to 125°C 200
25°C 160 200
Current limit V
OUT
= 0 V mA
–40°C to 125°C 220
(1) Output or reference voltage temperature coefficient is defined as the worst-case voltage change divided by the total temperature range.
(2) 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.
(3) Dropout voltage is defined as the input-to-output differential at which the output voltage drops 100 mV, below the value measured at 1-V
differential. The minimum input supply voltage of 2 V (2.3 V over temperature) must be observed.
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