Datasheet
TPS74701
SBVS099F –NOVEMBER 2007–REVISED NOVEMBER 2010
www.ti.com
ELECTRICAL CHARACTERISTICS
At V
EN
= 1.1V, V
IN
= V
OUT
+ 0.3V, C
BIAS
= 0.1mF, C
IN
= C
OUT
= 10mF, C
NR
= 1nF, I
OUT
= 50mA, V
BIAS
= 5.0V, and T
J
= –40°C to
+125°C, unless otherwise noted. Typical values are at T
J
= +25°C.
TPS74701
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN
Input voltage range V
OUT
+ V
DO
5.5 V
V
BIAS
Bias pin voltage range 2.7 5.5 V
V
REF
Internal reference (Adj.) T
J
= +25°C 0.796 0.8 0.804 V
Output voltage range V
IN
= 5V, I
OUT
= 500mA V
REF
3.6 V
V
OUT
2.97V ≤ V
BIAS
≤ 5.5V,
Accuracy
(1)
–2 ±0.5 2 %
50mA ≤ I
OUT
≤ 500mA
V
OUT
/V
IN
Line regulation V
OUT (NOM)
+ 0.3 ≤ V
IN
≤ 5.5V 0.03 %/V
V
OUT
/I
OUT
Load regulation 50mA ≤ I
OUT
≤ 500mA 0.09 %/A
I
OUT
= 500mA,
V
IN
dropout voltage
(2)
50 120 mV
V
BIAS
– V
OUT (NOM)
≥ 1.62V
(3)
V
DO
V
BIAS
dropout voltage
(2)
I
OUT
= 500mA, V
IN
= V
BIAS
1.31 1.39 V
I
CL
Current limit V
OUT
= 80% × V
OUT (NOM)
800 1350 mA
I
BIAS
Bias pin current 1 2 mA
Shutdown supply current
I
SHDN
V
EN
≤ 0.4V 1 50 mA
(I
GND
)
I
FB
Feedback pin current –1 0.150 1 mA
1kHz, I
OUT
= 500mA,
60
V
IN
= 1.8V, V
OUT
= 1.5V
Power-supply rejection
dB
(V
IN
to V
OUT
)
300kHz, I
OUT
= 500mA,
30
V
IN
= 1.8V, V
OUT
= 1.5V
PSRR
1kHz, I
OUT
= 500mA,
50
V
IN
= 1.8V, V
OUT
= 1.5V
Power-supply rejection
dB
(V
BIAS
to V
OUT
)
300kHz, I
OUT
= 500mA,
30
V
IN
= 1.8V, V
OUT
= 1.5V
100Hz to 100kHz,
Noise Output noise voltage 25 × V
OUT
mV
RMS
I
OUT
= 500mA, C
SS
= 0.001mF
t
STR
Minimum startup time R
LOAD
for I
OUT
= 1.0A, C
SS
= open 200 ms
I
SS
Soft-start charging current V
SS
= 0.4V 440 nA
V
EN, HI
Enable input high level 1.1 5.5 V
V
EN, LO
Enable input low level 0 0.4 V
V
EN, HYS
Enable pin hysteresis 50 mV
V
EN, DG
Enable pin deglitch time 20 ms
I
EN
Enable pin current V
EN
= 5V 0.1 1 mA
V
IT
PG trip threshold V
OUT
decreasing 85 90 94 %V
OUT
V
HYS
PG trip hysteresis 3 %V
OUT
V
PG, LO
PG output low voltage I
PG
= 1mA (sinking), V
OUT
< V
IT
0.3 V
I
PG, LKG
PG leakage current V
PG
= 5.25V, V
OUT
> V
IT
0.1 1 mA
Operating junction
T
J
–40 +125 °C
temperature
Shutdown, temperature increasing +165
Thermal shutdown
T
SD
°C
temperature
Reset, temperature decreasing +140
(1) Adjustable devices tested at 0.8V; resistor tolerance is not taken into account.
(2) Dropout is defined as the voltage from V
IN
to V
OUT
when V
OUT
is 3% below nominal.
(3) 1.62V is a test condition of this device and can be adjusted by referring to Figure 8.
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