Datasheet

ELECTRICAL CHARACTERISTICS
TPS781 Series
www.ti.com ........................................................................................................................................................... SBVS102B – MARCH 2008 – REVISED MAY 2008
Over operating temperature range (T
J
= – 40 ° C to +125 ° C), V
IN
= V
OUT(NOM)
+ 0.5V or 2.2V, whichever is greater; I
OUT
=
100 µ A, V
VSET
= V
EN
= V
IN
, C
OUT
= 1.0 µ F, fixed or adjustable, unless otherwise noted. Typical values at T
J
= +25 ° C.
TPS781 Series
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IN
Input voltage range 2.2 5.5 V
Nominal T
J
= +25 ° C, V
SET
= high/low – 2 ± 1 +2 %
V
OUT
(1)
DC output accuracy
Over V
IN
, I
OUT
, V
OUT
+ 0.5V ≤ V
IN
≤ 5.5V,
– 3.0 ± 2.0 +3.0 %
temperature 0mA ≤ I
OUT
≤ 150mA, V
SET
= high/low
Internal reference
(2)
V
FB
T
J
= +25 ° C, V
IN
= 4.0V, I
OUT
= 75mA 1.216 V
(adjustable version only)
Output voltage range
(3) (4)
V
OUT_RANGE
V
IN
= 5.5V, I
OUT
= 100 µ A
(2)
V
FB
5.25 V
(adjustable version only)
Δ V
OUT
/ Δ V
IN
Line regulation V
OUT(NOM)
+ 0.5V ≤ V
IN
≤ 5.5V, I
OUT
= 5mA – 1 +1 %
Δ V
OUT
/ Δ I
OUT
Load regulation 0mA ≤ I
OUT
≤ 150mA – 2 +2 %
V
DO
Dropout voltage
(5)
V
IN
= 95% V
OUT(NOM)
, I
OUT
= 150mA 250 mV
BW = 100Hz to 100kHz, V
IN
= 2.2V,
V
N
Output noise voltage 86 µ V
RMS
V
OUT
= 1.2V, I
OUT
= 1mA
V
SET
high (output V
OUT(LOW)
V
HI
1.2 V
IN
V
selected), or EN high (enabled)
V
SET
low (output V
OUT(HIGH)
V
LO
0 0.4 V
selected), or EN low (disabled)
I
CL
Output current limit V
OUT
= 0.90 × V
OUT(NOM)
150 230 400 mA
I
OUT
= 0mA 1.0 1.3 µ A
I
GND
Ground pin current
I
OUT
= 150mA 8 µ A
V
EN
≤ 0.4V, 2.2V ≤ V
IN
< 5.5V,
I
SHDN
Shutdown current (I
GND
) 18 130 nA
T
J
= – 40 ° C to +100 ° C
I
VSET
V
SET
pin current V
EN
= V
VSET
= 5.5V 70 nA
I
EN
EN pin current V
EN
= V
VSET
= 5.5V 40 nA
FB pin current
(6)
I
FB
V
IN
= 5.5V, V
OUT
= 1.2V, I
OUT
= 100 µ A 10 nA
(adjustable version only)
f = 10Hz 40 dB
V
IN
= 4.3V,
PSRR Power-supply rejection ratio V
OUT
= 3.3V, f = 100Hz 20 dB
I
OUT
= 150mA
f = 1kHz 15 dB
V
OUT
transition time (high-to-low) V
OUT_LOW
= 2.2V, V
OUT(HIGH)
= 3.3V,
t
TR(H → L)
800 µ s
V
OUT
= 97% × V
OUT(HIGH)
I
OUT
= 10mA
V
OUT
transition time (low-to-high) V
OUT_HIGH
= 3.3V, V
OUT(LOW)
= 2.2V,
t
TR(L → H)
800 µ s
V
OUT
= 97% × V
OUT(LOW)
I
OUT
= 10mA
C
OUT
= 1.0 µ F, V
OUT
= 10% V
OUT(NOM)
to
t
STR
Startup time
(7)
500 µ s
V
OUT
= 90% V
OUT(NOM)
I
OUT
= 150mA, C
OUT
= 1.0 µ F, V
OUT
= 2.8V,
t
SHDN
Shutdown time
(8)
V
OUT
= 90% V
OUT(NOM)
to V
OUT
= 10% 500
(9)
µ s
V
OUT(NOM)
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 for V
SET
= low/high is programmed at the factory.
(2) Adjustable version only.
(3) No V
SET
pin on the adjustable version.
(4) No dynamic voltage scaling on the adjustable version.
(5) V
DO
is not measured for devices with V
OUT(NOM)
< 2.3V because minimum V
IN
= 2.2V.
(6) The TPS78101 FB pin is tied to V
OUT
. Adjustable version only.
(7) Time from V
EN
= 1.2V to V
OUT
= 90% (V
OUT(NOM)
).
(8) Time from V
EN
= 0.4V to V
OUT
= 10% (V
OUT(NOM)
).
(9) See Shutdown in the Application Information section for more details.
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