Datasheet

TPS727xx
www.ti.com SBVS128C –JUNE 2009–REVISED JANUARY 2011
ELECTRICAL CHARACTERISTICS
Over operating temperature range (T
J
= –40°C to +125°C), V
IN
= V
OUT(TYP)
+ 0.3V or 2.0V, whichever is greater;
I
OUT
= 10mA, V
EN
= 0.9V, and C
OUT
= 1.0mF, unless otherwise noted. Typical values are at T
J
= +25°C.
TPS727xx
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN
Input voltage range 2.0 5.5 V
V
O
Output voltage range 0.9 5.0 V
T
J
= +25°C –2.5 +2.5 mV
V
OUT
+ 0.3V ≤ V
IN
≤ 5.5V,
–2.0 ±1.0 +2.0 %
V
OUT
(1)
DC output accuracy 0mA ≤ I
OUT
≤ 200mA
V
OUT
+ 0.3V ≤ V
IN
≤ 5.5V,
±1.0 %
0mA ≤ I
OUT
≤ 250mA
1mA to 200mA or
±50.0 mV
200mA to 1mA in 1ms, C
OUT
= 1mF
ΔV
OUT
Load transient
1mA to 250mA or
±65 mV
250mA to 1mA in 1ms, C
OUT
= 1mF
V
OUT(NOM)
+ 0.3V ≤ V
IN
≤ 5.5V,
ΔV
O
/ΔV
IN
Line regulation 8 mV/V
I
OUT
= 10mA
ΔV
O
/ΔI
OUT
Load regulation 0mA ≤ I
OUT
≤ 250mA 20 mV/mA
V
IN
= 0.98 × V
OUT(NOM)
, I
OUT
= 10mA 6.5 mV
V
IN
= 0.98 × V
OUT(NOM)
, I
OUT
= 50mA 32.5 mV
V
DO
Dropout voltage
(2)
V
IN
= 0.98 × V
OUT(NOM)
, I
OUT
= 100mA 65 mV
V
IN
= 0.98 × V
OUT(NOM)
, I
OUT
= 200mA 130 200 mV
V
IN
= 0.98 × V
OUT(NOM)
, I
OUT
= 250mA 162.5 mV
I
CL
Output current limit V
OUT
= 0.9 × V
OUT(NOM)
300 400 550 mA
I
OUT
= 0mA, T
J
= –40°C to +125°C 7.9 12 mA
I
GND
Ground pin current I
OUT
= 200mA 110 mA
I
OUT
= 250mA 130 mA
V
EN
≤ 0.4V, V
IN
= 2V, T
J
= +25°C 0.12 mA
I
SHDN
Shutdown current (I
GND
)
V
EN
≤ 0.4V, 2.0V < V
IN
≤ 4.5V,
0.55 2 mA
T
J
= –40°C to +85°C
f = 10Hz 85 dB
f = 100Hz 75 dB
V
IN
= 2.3V,
f = 1kHz 70 dB
PSRR Power-supply rejection ratio V
OUT
= 1.8V,
f = 10kHz 55 dB
I
OUT
= 10mA
f = 100kHz 40 dB
f = 1MHz 45 dB
BW = 100Hz to 100kHz, V
IN
= 2.1V,
V
N
Output noise voltage 33.5 mV
RMS
V
OUT
= 1.8V, I
OUT
= 10mA
t
STR
Startup time
(3)
C
OUT
= 1.0mF, 0 ≤ I
OUT
≤ 250mA 100 ms
V
HI
Enable pin high (enabled) 0.9 V
IN
V
V
LO
Enable pin low (disabled) 0 0.4 V
I
EN
Enable pin current EN = 5.5V 40 500 nA
UVLO Undervoltage lock-out V
IN
rising 1.85 1.90 1.95 V
Shutdown, temperature increasing +160 °C
T
SD
Thermal shutdown temperature
Reset, temperature decreasing +140 °C
T
J
Operating junction temperature –40 +125 °C
(1) The output voltage is programmed at the factory.
(2) V
DO
is measured for devices with V
OUT(NOM)
≥ 2.35V so that V
IN
≥ 2.3V.
(3) Startup time: Time from EN assertion to 0.98 × V
OUT(NOM)
.
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