Datasheet

TPS74801-Q1
SLVSAI4B –OCTOBER 2010–REVISED JULY 2013 www.ti.com
ELECTRICAL CHARACTERISTICS
At V
EN
= 1.1 V, V
IN
= V
OUT
+ 0.3 V, C
BIAS
= 0.1 μF, C
IN
= C
OUT
= 10 μF, C
NR
= 1 nF, I
OUT
= 50 mA, V
BIAS
= 5 V, T
A
= –40°C to
105°C (DRC) and T
A
= –40°C to 125°C (RGW), unless otherwise noted. Typical values are at T
A
= 25°C.
TPS74801-Q1
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
A
= 25°C 0.796 0.8 0.804 V
Output voltage range V
IN
= 5 V, I
OUT
= 1.5 A V
REF
3.6 V
V
OUT
2.97 V ≤ V
BIAS
≤ 5.5 V,
Accuracy
(1)
–2 ±0.5 2 %
50 mA ≤ I
OUT
≤ 1.5 A
V
OUT
/V
IN
Line regulation V
OUT (NOM)
+ 0.3 ≤ V
IN
≤ 5.5 V 0.03 %/V
V
OUT
/I
OUT
Load regulation 50 mA ≤ I
OUT
≤ 1.5 A 0.09 %/A
I
OUT
= 1.5 A, 60 165 mV
V
IN
dropout voltage
(2)
V
BIAS
– V
OUT (NOM)
≥ 3.25 V
(3)
V
DO
V
BIAS
dropout voltage
(2)
I
OUT
= 1.5 A, V
IN
= V
BIAS
1.31 1.6 V
I
CL
Current limit V
OUT
= 80% × V
OUT (NOM)
2.0 5.5 A
I
BIAS
Bias pin current 1 2 mA
Shutdown supply current
I
SHDN
V
EN
≤ 0.4 V 1 50 μA
(I
GND
)
I
FB
Feedback pin current –1 0.150 1 μA
1 kHz, I
OUT
= 1.5 A,
60
V
IN
= 1.8 V, V
OUT
= 1.5 V
Power-supply rejection
dB
(V
IN
to V
OUT
)
300 kHz, I
OUT
= 1.5 A,
30
V
IN
= 1.8 V, V
OUT
= 1.5 V
PSRR
1 kHz, I
OUT
= 1.5 A,
50
V
IN
= 1.8 V, V
OUT
= 1.5 V
Power-supply rejection
dB
(V
BIAS
to V
OUT
)
300 kHz, I
OUT
= 1.5 A,
30
V
IN
= 1.8 V, V
OUT
= 1.5 V
100 Hz to 100 kHz,
Noise Output noise voltage 25 × V
OUT
μV
RMS
I
OUT
= 1.5 A, C
SS
= 0.001 μF
t
STR
Minimum startup time R
LOAD
for I
OUT
= 1 A, C
SS
= open 200 μs
I
SS
Soft-start charging current V
SS
= 0.4 V 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 μs
I
EN
Enable pin current V
EN
= 5 V 0.1 1 μA
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
= 1 mA (sinking), V
OUT
< V
IT
0.3 V
I
PG, LKG
PG leakage current V
PG
= 5.25 V, V
OUT
> V
IT
0.1 1 μA
Shutdown, temperature increasing 165
Thermal shutdown
T
SD
°C
temperature
Reset, temperature decreasing 140
(1) Adjustable devices tested at 0.8 V; 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) 3.25 V is a test condition of this device and can be adjusted by referring to Figure 8.
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