Datasheet

TPS7A41
www.ti.com SBVS183 –DECEMBER 2011
ELECTRICAL CHARACTERISTICS
At T
J
= –40°C to +125°C, V
IN
= V
OUT(NOM)
+ 2.0 V or V
IN
= 7.0 V (whichever is greater), V
EN
= V
IN
, I
OUT
= 100 µA, C
IN
= 1 μF, C
OUT
= 4.7 μF,
and FB tied to OUT, unless otherwise noted.
TPS7A41
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN
Input voltage range 7.0 50.0 V
V
REF
Internal reference T
J
= +25°C, V
FB
= V
REF
, V
IN
= 9 V, I
OUT
= 25 mA 1.161 1.173 1.185 V
Output voltage range
(1)
V
IN
≥ V
OUT(NOM)
+ 2.0 V V
REF
48 V
Nominal accuracy T
J
= +25°C, V
IN
= 9 V, I
OUT
= 25 mA –1.0 +1.0 %V
OUT
V
OUT
V
OUT(NOM)
+ 2.0 V ≤ V
IN
≤ 24 V
(2)
Overall accuracy –2.5 +2.5 %V
OUT
100 µA ≤ I
OUT
≤ 50 mA
ΔV
O(ΔVI)
Line regulation 7 V ≤ V
IN
≤ 50 V 0.03 %V
OUT
ΔV
O(ΔVL)
Load regulation 100 µA ≤ I
OUT
≤ 50 mA 0.31 %V
OUT
V
IN
= 17 V, V
OUT(NOM)
= 18 V, I
OUT
= 20 mA 290 mV
V
DO
Dropout voltage
V
IN
= 17 V, V
OUT(NOM)
= 18 V, I
OUT
= 50 mA 0.78 1.3 V
V
OUT
= 90% V
OUT(NOM)
, V
IN
= 7.0 V, T
J
≤ +85°C 51 117 200 mA
I
LIM
Current limit
V
OUT
= 90% V
OUT(NOM)
, V
IN
= 9.0 V 51 128 200 mA
7 V ≤ V
IN
≤ 50 V, I
OUT
= 0 mA 25 65 μA
I
GND
Ground current
I
OUT
= 50 mA 25 μA
I
SHDN
Shutdown supply current V
EN
= +0.4 V 4.1 20 μA
I
FB
Feedback current
(3)
–0.1 0.01 0.1 µA
I
EN
Enable current 7 V ≤ V
IN
≤ 50 V, V
IN
= V
EN
0.02 1.0 μA
V
EN_HI
Enable high-level voltage 1.5 V
IN
V
V
EN_LO
Enable low- level voltage 0 0.4 V
V
IN
= 12 V, V
OUT(NOM)
= V
REF
, C
OUT
= 10 μF,
58 μV
RMS
BW = 10 Hz to 100 kHz
V
NOISE
Output noise voltage
V
IN
= 12 V, V
OUT(NOM)
= 5 V, C
OUT
= 10 μF,
73 μV
RMS
C
BYP
(4)
= 10 nF, BW = 10 Hz to 100 kHz
V
IN
= 12 V, V
OUT(NOM)
= 5 V, C
OUT
= 10 μF,
PSRR Power-supply rejection ratio 65 dB
C
BYP
(4)
= 10 nF, f = 100 Hz
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 greater than or equal to 10 μA is required.
(2) Maximum input voltage is limited to 24 V because of the package power dissipation limitations at full load (P ≈ (V
IN
– V
OUT
) × I
OUT
= (24
V – V
REF
) × 50 mA ≈ 1.14 W). The device is capable of sourcing a maximum current of 50 mA at higher input voltages as long as the
power dissipated is within the thermal limits of the package plus any external heatsinking.
(3) I
FB
> 0 flows out of the device.
(4) C
BYP
refers to a bypass capacitor connected to the FB and OUT pins.
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