Datasheet

TPS7A8101
SBVS179A –DECEMBER 2011–REVISED APRIL 2012 www.ti.com
ELECTRICAL CHARACTERISTICS
Over the operating temperature range of T
J
= –40°C to +125°C, V
IN
= V
OUT(TYP)
+ 0.5 V or 2.2 V (whichever is greater),
I
OUT
= 1 mA, V
EN
= 2.2 V, C
OUT
= 4.7 μF, C
NR
= 0.01 μF, and C
BYPASS
= 0 μF, unless otherwise noted. TPS7A8101 is tested at
V
OUT
= 0.8 V and V
OUT
= 6.0 V. Typical values are at T
J
= +25°C.
TPS7A8101
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN
Input voltage range
(1)
2.2 6.5 V
V
NR
Internal reference 0.790 0.800 0.810 V
Output voltage range 0.8 6.0 V
V
OUT
+ 0.5 V ≤ V
IN
≤ 6.0 V, V
IN
≥ 2.5 V,
-2.0 +2.0 %
V
OUT
100 mA ≤ I
OUT
≤ 500 mA, 0°C ≤ T
J
≤ 85°C
Output accuracy
(2)
V
OUT
+ 0.5 V ≤ V
IN
≤ 6.5 V, V
IN
≥ 2.2 V,
–3.0 ±0.3 +3.0 %
100 mA ≤ I
OUT
≤ 1 A
V
OUT(NOM)
+ 0.5 V ≤ V
IN
≤ 6.5 V, V
IN
≥ 2.2 V,
ΔV
O(ΔVI)
Line regulation 150 μV/V
I
OUT
= 100 mA
ΔV
O(ΔIL)
Load regulation 100 mA ≤ I
OUT
≤ 1 A 2 μV/mA
V
OUT
+ 0.5 V ≤ V
IN
≤ 6.5 V, V
IN
≥ 2.2 V,
250 mV
I
OUT
= 500 mA, V
FB
= GND or V
SNS
= GND
V
OUT
+ 0.5 V ≤ V
IN
≤ 6.5 V, V
IN
≥ 2.5 V,
V
DO
Dropout voltage
(3)
350 mV
I
OUT
= 750 mA, V
FB
= GND or V
SNS
= GND
V
OUT
+ 0.5 V ≤ V
IN
≤ 6.5 V, V
IN
≥ 2.5 V,
500 mV
I
OUT
= 1 A, V
FB
= GND or V
SNS
= GND
I
LIM
Output current limit V
OUT
= 0.85 × V
OUT(NOM)
, V
IN
≥ 3.3 V 1100 1400 2000 mA
I
OUT
= 1 mA 60 100 μA
I
GND
Ground pin current
I
OUT
= 1 A 350 μA
V
EN
≤ 0.4 V, V
IN
≥ 2.2 V, R
L
= 1 kΩ,
I
SHDN
Shutdown current (I
GND
) 0.20 2 μA
0°C ≤ T
J
≤ 85°C
I
FB
Feedback pin current V
IN
= 6.5 V, V
FB
= 0.8 V 0.02 1.0 μA
f = 100 Hz 80 dB
f = 1 kHz 82 dB
V
IN
= 4.3 V, V
OUT
= 3.3 V,
PSRR Power-supply rejection ratio f = 10 kHz 78 dB
I
OUT
= 750 mA
f = 100 kHz 60 dB
f = 1 MHz 54 dB
BW = 100 Hz to 100 kHz,
V
n
Output noise voltage V
IN
= 3.8 V, V
OUT
= 3.3 V, 23.5 μV
RMS
I
OUT
= 100 mA, C
NR
= C
BYPASS
= 470 nF
2.2 V ≤ V
IN
≤ 3.6 V, R
L
= 1 kΩ 1.2 V
V
EN(HI)
Enable high (enabled)
3.6 V < V
IN
≤ 6.5 V, R
L
= 1 kΩ 1.35 V
V
EN(LO)
Enable low (shutdown) R
L
= 1 kΩ 0 0.4 V
I
EN(HI)
Enable pin current, enabled V
IN
= V
EN
= 6.5 V 0.02 1.0 μA
V
OUT(NOM)
= 3.3 V, V
OUT
= 0% to 90% V
OUT(NOM)
,
t
STR
Startup time 80 ms
R
L
= 3.3 kΩ, C
OUT
= 10 μF, C
NR
= 470 nF
Undervoltage lockout V
IN
rising, R
L
= 1 kΩ 1.86 2 2.10 V
UVLO
Hysteresis V
IN
falling, R
L
= 1 kΩ 75 mV
Shutdown, temperature increasing +160 °C
T
SD
Thermal shutdown temperature
Reset, temperature decreasing +140 °C
T
J
Operating junction temperature –40 +125 °C
(1) Minimum V
IN
= V
OUT
+ V
DO
or 2.2 V, whichever is greater.
(2) The TPS7A8101 does not include external resistor tolerances and it is not tested at this condition: V
OUT
= 0.8 V, 4.5V ≤ V
IN
≤ 6.5 V, and
750 mA ≤ I
OUT
≤ 1 A because the power dissipation is greater than the maximum rating of the package.
(3) V
DO
is not measured for fixed output voltage devices with V
OUT
< 1.7 V because minimum V
IN
= 2.2 V.
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