Datasheet

TPS799xx
www.ti.com SBVS056J –JANUARY 2005–REVISED AUGUST 2010
ELECTRICAL CHARACTERISTICS
Over operating temperature range (T
J
= –40°C to +125°C), V
IN
= V
OUT(TYP)
+ 0.3V or 2.7V, whichever is greater; I
OUT
= 1mA,
V
EN
= V
IN
, C
OUT
= 2.2mF, C
NR
= 0.01mF, unless otherwise noted. For TPS79901, V
OUT
= 3.0V.
Typical values are at T
J
= +25°C.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN
Input voltage range
(1)
2.7 6.5 V
V
FB
Internal reference (TPS79901) 1.169 1.193 1.217 V
V
OUT
Output voltage range (TPS79901) V
FB
6.5 – V
DO
V
V
OUT
Output accuracy Nominal T
J
= +25°C –1.0 +1.0 %
Over V
IN
, V
OUT
+ 0.3V ≤ V
IN
≤ 6.5V
V
OUT
Output accuracy
(1)
–2.0 ±1.0 +2.0 %
I
OUT
, Temp 500mA ≤ I
OUT
≤ 200mA
ΔV
OUT
%/ ΔV
IN
Line regulation
(1)
V
OUT(NOM)
+ 0.3V ≤ V
IN
≤ 6.5V 0.02 %/V
ΔV
OUT
%/ ΔI
OUT
Load regulation 500mA ≤ I
OUT
≤ 200mA 0.002 %/mA
Dropout voltage
(2)
V
DO
V
OUT
< 3.3V I
OUT
= 200mA 100 175 mV
(V
IN
= V
OUT(NOM)
– 0.1V)
Dropout voltage
V
DO
V
OUT
≥ 3.3V I
OUT
= 200mA 90 160 mV
(V
IN
= V
OUT(NOM)
– 0.1V)
I
CL
Output current limit V
OUT
= 0.9 × V
OUT(NOM)
200 400 600 mA
I
GND
Ground pin current 500mA ≤ I
OUT
≤ 200mA 40 60 mA
I
SHDN
Shutdown current (I
GND
) V
EN
≤ 0.4V, 2.7V ≤ V
IN
≤ 6.5V 0.15 1.0 mA
I
FB
Feedback pin current (TPS79901) –0.5 0.5 mA
f = 100Hz 70 dB
Power-supply rejection ratio
f = 1kHz 66 dB
PSRR V
IN
= 3.85V, V
OUT
= 2.85V,
f = 10kHz 51 dB
C
NR
= 0.01mF, I
OUT
= 100mA
f = 100kHz 38 dB
C
NR
= 0.01mF 10.5 x V
OUT
mV
RMS
Output noise voltage
V
N
BW = 10Hz to 100kHz, V
OUT
= 2.8V
C
NR
= none 94 x V
OUT
mV
RMS
C
NR
= 0.001mF 45 ms
Startup time
C
NR
= 0.047mF 45 ms
T
STR
V
OUT
= 2.85V,
C
NR
= 0.01mF 50 ms
R
L
= 14Ω, C
OUT
= 2.2mF
C
NR
= none 50 ms
V
EN(HI)
Enable high (enabled) 1.2 V
IN
V
V
EN(LO)
Enable low (shutdown) 0 0.4 V
I
EN(HI)
Enable pin current, enabled V
EN
= V
IN
= 6.5V 0.03 1.0 mA
Shutdown, temperature increasing 165 °C
TSD Thermal shutdown temperature
Reset, temperature decreasing 145 °C
T
J
Operating junction temperature –40 +125 °C
Under-voltage lock-out V
IN
rising 1.90 2.20 2.65 V
UVLO
Hysteresis V
IN
falling 70 mV
(1) Minimum V
IN
= V
OUT
+ V
DO
or 2.7V, whichever is greater.
(2) V
DO
is not measured for devices with V
OUT(NOM)
< 2.8V because minimum V
IN
= 2.7V.
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