Datasheet

TPS786xx
SLVS389L –SEPTEMBER 2002–REVISED OCTOBER 2010 www.ti.com
ELECTRICAL CHARACTERISTICS
Over recommended operating temperature range (T
J
= –40°C to +125°C), V
EN
= V
IN
, V
IN
= V
OUT(nom)
+ 1 V
(1)
, I
OUT
= 1 mA,
C
OUT
= 10 mF, and C
NR
= 0.01 mF, unless otherwise noted. Typical values are at +25°C.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Input voltage, V
IN
(1)
2.7 5.5 V
Internal reference, V
FB
(TPS78601) 1.200 1.225 1.250 V
Continuous output current I
OUT
0 1.5 A
Output voltage range TPS78601 1.225 5.5 – V
DO
V
TPS78601
(2)
0 mA ≤ I
OUT
≤ 1.5 A, V
OUT
+ 1 V ≤ V
IN
≤ 5.5 V
(1)
(0.98)V
OUT
V
OUT
(1.02)V
OUT
V
Output
Fixed V
OUT
0 mA ≤ I
OUT
≤ 1.5 A, V
OUT
+ 1 V ≤ V
IN
≤ 5.5 V
(1)
–2.0 +2.0 %
voltage
Accuracy < 5 V
Fixed V
OUT
0 mA ≤ I
OUT
≤ 1.5 A, V
OUT
+ 1 V ≤ V
IN
≤ 5.5 V
(1)
–3.0 +3.0 %
= 5 V
Output voltage line regulation (ΔV
OUT
%/V
IN
)
(1)
V
OUT
+ 1 V ≤ V
IN
≤ 5.5 V 5 12 %/V
Load regulation (ΔV
OUT
%/V
OUT
) 0 mA ≤ I
OUT
≤ 1.5 A 7 mV
TPS78628 I
OUT
= 1.5 A 410 580
TPS78630 I
OUT
= 1.5 A 390 550
Dropout voltage
(3)
mV
V
IN
= V
OUT(nom)
– 0.1 V
TPS78633 I
OUT
= 1.5 A 340 510
TPS78650 I
OUT
= 1.5 A 310 470
Output current limit V
OUT
= 0 V 2.4 4.2 A
Ground pin current 0 mA ≤ I
OUT
≤ 1.5 A 260 385 mA
Shutdown current
(4)
V
EN
= 0 V, 2.7 V ≤ V
IN
≤ 5.5 V 0.07 1 mA
FB pin current V
FB
= 1.225 V 1 mA
f = 100 Hz, I
OUT
= 10 mA 59
f = 100 Hz, I
OUT
= 1.5 A 52
Power-supply ripple rejection TPS78630 dB
f = 10 kHz, I
OUT
= 1.5 A 49
f = 100 kHz, I
OUT
= 1.5 A 32
C
NR
= 0.001 mF 66
C
NR
= 0.0047 mF 51
BW = 100 Hz to 100 kHz,
Output noise voltage (TPS78630) mV
RMS
I
OUT
= 1.5 A
C
NR
= 0.01 mF 49
C
NR
= 0.1 mF 48
C
NR
= 0.001 mF 50
Time, start-up (TPS78630) R
L
= 2 Ω, C
OUT
= 1 mF C
NR
= 0.0047 mF 75 ms
C
NR
= 0.01 mF 110
High-level enable input voltage 2.7 V ≤ V
IN
≤ 5.5 V 1.7 V
IN
V
Low-level enable input voltage 2.7 V ≤ V
IN
≤ 5.5 V 0 0.7 V
EN pin current V
EN
= 0 –1 1 mA
UVLO threshold V
CC
rising 2.25 2.65 V
UVLO hysteresis 100 mV
(1) Minimum V
IN
= V
OUT
+ V
DO
or 2.7 V, whichever is greater. The TPS78650 is tested at V
IN
= 5.5 V.
(2) Tolerance of external resistors not included in this specification.
(3) Dropout is not measured for TPS78618 or TPS78625 since minimum V
IN
= 2.7 V.
(4) For adjustable version, this applies only after V
IN
is applied; then V
EN
transitions high to low.
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