Datasheet

D%V
OUT
DV
IN
D%V
OUT
DI
OUT
TPS7A4001
www.ti.com SBVS162A –MARCH 2011–REVISED MARCH 2011
ELECTRICAL CHARACTERISTICS
At T
J
= –40°C to +125°C, V
IN
= V
OUT(NOM)
+ 2.0V or V
IN
= 7.0V (whichever is greater), V
EN
= V
IN
, I
OUT
= 100µA, C
IN
= 1μF, C
OUT
= 4.7μF,
and FB tied to OUT, unless otherwise noted.
TPS7A4001
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN
Input voltage range 7.0 100.0 V
V
REF
Internal reference T
J
= +25°C, V
FB
= V
REF
, V
IN
= 9V, I
OUT
= 25mA 1.161 1.173 1.185 V
Output voltage range
(1)
V
IN
≥ V
OUT(NOM)
+ 2.0V V
REF
90 V
Nominal accuracy T
J
= +25°C, V
IN
= 9V, I
OUT
= 25mA –1.0 +1.0 %V
OUT
V
OUT
V
OUT(NOM)
+ 2.0V ≤ V
IN
≤ 24V
(2)
Overall accuracy –2.5 +2.5 %V
OUT
100µA ≤ I
OUT
≤ 50mA
Line regulation 7V ≤ V
IN
≤ 100V 0.03 %V
OUT
Load regulation 100µA ≤ I
OUT
≤ 50mA 0.31 %V
OUT
V
IN
= 17V, V
OUT(NOM)
= 18V, I
OUT
= 20mA 290 mV
V
DO
Dropout voltage
V
IN
= 17V, V
OUT(NOM)
= 18V, I
OUT
= 50mA 0.78 1.3 V
V
OUT
= 90% V
OUT(NOM)
, V
IN
= 7.0V, T
J
≤ +85°C 51 117 200 mA
I
LIM
Current limit
V
OUT
= 90% V
OUT(NOM)
, V
IN
= 9.0V 51 128 200 mA
7V ≤ V
IN
≤ 100V, I
OUT
= 0mA 25 65 μA
I
GND
Ground current
I
OUT
= 50mA 25 μA
I
SHDN
Shutdown supply current V
EN
= +0.4V 4.1 20 μA
I
FB
Feedback current
(3)
–0.1 0.01 0.1 µA
I
EN
Enable current 7V ≤ V
IN
≤ 100V, 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
= 12V, V
OUT(NOM)
= V
REF
, C
OUT
= 10μF,
58 μV
RMS
BW = 10Hz to 100kHz
V
NOISE
Output noise voltage
V
IN
= 12V, V
OUT(NOM)
= 5V, C
OUT
= 10μF,
73 μV
RMS
C
BYP
(4)
= 10nF, BW = 10Hz to 100kHz
V
IN
= 12V, V
OUT(NOM)
= 5V, C
OUT
= 10μF,
PSRR Power-supply rejection ratio 65 dB
C
BYP
(4)
= 10nF, f = 100Hz
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 10μA is required.
(2) Maximum input voltage is limited to 24V because of the package power dissipation limitations at full load (P ≈ (V
IN
– V
OUT
) × I
OUT
=
(24V – V
REF
) × 50mA ≈ 1.14W). The device is capable of sourcing a maximum current of 50mA 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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