Datasheet

TPS7A33
www.ti.com SBVS169C –DECEMBER 2011–REVISED FEBRUARY 2013
ELECTRICAL CHARACTERISTICS
(1)
At –40°C ≤ T
J
≤ +125°C, |V
IN
| = |V
OUT(NOM)
| + 1.0 V or |V
IN
| = 3.0 V (whichever is greater), V
EN
= V
IN
, I
OUT
= 1 mA, C
IN
= 10 μF, C
OUT
= 10
μF, C
NR/SS
= 0 nF, and FB tied to OUT, unless otherwise noted.
TPS7A33
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN
Input voltage range –35.0 –3.0 V
V
REF
Internal reference T
J
= +25°C, V
FB
= V
REF
–1.192 –1.175 –1.157 V
V
UVLO
Under-voltage lockout threshold -2.0 V
Output voltage range
(2)
|V
IN
| ≥ |V
OUT(NOM)
| + 1.0 V –33.2 V
REF
V
Nominal accuracy T
J
= +25°C, |V
IN
| = |V
OUT(NOM)
| + 0.5 V –1.5 1.5 %V
OUT
5.0 V ≤ |V
IN
| ≤ 35 V
V
OUT
±1.0 %V
OUT
1 mA ≤ I
OUT
≤ 1 A
Overall accuracy
|V
OUT(NOM)
| + 1.0 V ≤ |V
IN
| ≤ 35 V
–2.5 2.5 %V
OUT
1 mA ≤ I
OUT
≤ 1 A
ΔV
O(ΔVI)
Line regulation |V
OUT(NOM)
| + 1.0 V ≤ |V
IN
| ≤ 35 V 0.14 %V
OUT
ΔV
O(ΔIL)
Load regulation 1 mA ≤ I
OUT
≤ 1 A 0.4 %V
OUT
V
IN
= 95% V
OUT(NOM)
, I
OUT
= 500 mA 290 mV
|V
DO
| Dropout voltage
V
IN
= 95% V
OUT(NOM)
, I
OUT
= 1 A 325 800 mV
I
LIM
Current limit V
OUT
= 90% V
OUT(NOM)
1900 mA
I
OUT
= 0 mA 210 350 μA
I
GND
Ground current
I
OUT
= 500 mA 5 mA
V
EN
= +0.4 V 1.0 3.0 μA
|I
SHDN
| Shutdown supply current
V
EN
= –0.4 V 1.0 3.0 μA
I
FB
Feedback current
(3)
14 100 nA
V
EN
= |V
IN
| = |V
OUT(NOM)
| + 1.0 V 0.48 1.0 μA
|I
EN
| Enable current V
IN
= V
EN
= –35 V 0.51 1.0 μA
V
IN
= –35 V, V
EN
= +10 V 0.50 1.0 μA
V
+EN_HI
Positive enable high-level voltage 2.0 10 V
V
+EN_LO
Positive enable low-level voltage 0 0.4 V
V
–EN_HI
Negative enable high-level voltage V
IN
–2.0 V
V
–EN_LO
Negative enable low-level voltage –0.4 0 V
V
IN
= –3 V, V
OUT(NOM)
= V
REF
, C
OUT
= 22 μF,
V
n
Output noise voltage 16 μV
RMS
C
NR/SS
= 10 nF, BW = 10 Hz to 100 kHz
V
IN
= –6.2 V, V
OUT(NOM)
= –5 V, C
OUT
= 22 μF,
PSRR Power-supply rejection ratio 72 dB
C
NR/SS
= 10 nF, C
FF
(4)
= 10 nF, f = 10 kHz
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) At operating conditions, V
IN
≤ 0 V, V
OUT(NOM)
≤ V
REF
≤ 0 V. At regulation, V
IN
≤ V
OUT(NOM)
– |V
DO
|. I
OUT
> 0 flows from OUT to IN.
(2) To ensure stability at no load conditions, a current from the feedback resistive network equal to or greater than 5 μA is required.
(3) I
FB
> 0 flows into the device.
(4) C
FF
refers to a feed-forward capacitor connected to the FB and OUT pins.
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