Datasheet

D DV ( V )
OUT IN
V
OUT(NOM)
D DV ( I )
OUT OUT
V
OUT(NOM)
TPS7A49xx
www.ti.com SBVS121B –AUGUST 2010–REVISED JANUARY 2010
ELECTRICAL CHARACTERISTICS
At T
J
= –40°C to +125°C, V
IN
= V
OUT(NOM)
+ 1.0V or V
IN
= 3.0V (whichever is greater), V
EN
= V
IN
, I
OUT
= 1mA, C
IN
= 2.2mF, C
OUT
= 2.2mF,
C
NR/SS
= 0nF, and the FB pin tied to OUT, unless otherwise noted.
TPS7A49xx
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN
Input voltage range 3.0 35 V
V
REF
Internal reference T
J
= +25°C, V
NR/SS
= V
REF
1.176 1.194 1.212 V
Output voltage range
(1)
V
IN
≥ V
OUT(NOM)
+ 1.0V V
REF
33.0 V
Nominal accuracy T
J
= +25°C, V
IN
= V
OUT(NOM)
+ 0.5V –1.5 +1.5 %V
OUT
V
OUT
V
OUT(NOM)
+ 1.0V ≤ V
IN
≤ 35V
Overall accuracy –2.5 +2.5 %V
OUT
1mA ≤ I
OUT
≤ 150mA
Line regulation T
J
= +25°C, V
OUT(NOM)
+ 1.0V ≤ V
IN
≤ 35V 0.11 %V
OUT
Load regulation T
J
= +25°C, 1mA ≤ I
OUT
≤ 150mA 0.04 %V
OUT
V
IN
= 95% V
OUT(NOM)
, I
OUT
= 100mA 260 mV
V
DO
Dropout voltage
V
IN
= 95% V
OUT(NOM)
, I
OUT
= 150mA 333 600 mV
I
LIM
Current limit V
OUT
= 90% V
OUT(NOM)
220 309 500 mA
I
OUT
= 0mA 61 100 mA
I
GND
Ground current
I
OUT
= 100mA 800 mA
I
SHDN
Shutdown supply current V
EN
= +0.4V 0.8 3.0 mA
I
FB
Feedback current
(2)
3 100 nA
V
EN
= V
IN
= V
OUT(NOM)
+ 1.0V 0.02 1.0 mA
I
EN
Enable current
V
EN
= V
IN
= +35V 0.2 1.0 mA
V
EN_HI
Enable high-level voltage +2.1 V
IN
V
V
EN_LO
Enable low- level voltage 0 +0.4 V
V
IN
= +3V, V
OUT(NOM)
= V
REF
, C
OUT
= 10mF,
15.4 mV
RMS
C
NR/SS
= 10nF, BW = 10Hz to 100kHz
V
NOISE
Output noise voltage
V
IN
= +6.2V, V
OUT(NOM)
= +5V, C
OUT
= 10mF,
C
NR/SS
= C
BYP
(3)
= 10nF, BW = 10Hz to 21.15 mV
RMS
100kHz
V
IN
= +6.2V, V
OUT(NOM)
= +5V, C
OUT
= 10mF,
PSRR Power-supply rejection ratio 72 dB
C
NR/SS
= C
BYP
(3)
= 10nF, f = 120Hz
Shutdown, temperature increasing +170 °C
T
SD
Thermal shutdown temperature
Reset, temperature decreasing +150 °C
Operating junction temperature
T
J
–40 +125 °C
range
(1) To ensure stability at no load conditions, a current from the feedback resistive network equal to or greater than 5mA is required.
(2) I
FB
> 0 flows out of the device.
(3) C
BYP
refers to a bypass capacitor connected to the FB and OUT pins.
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