Datasheet

TPS79201, TPS79225
TPS79228, TPS79230
SLVS337B – MARCH 2001 – REVISED MAY 2002
www.ti.com
3
ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, (T
J
= –40 to 125°C), V
I
= V
O(typ)
+ 1 V, I
O
= 1 mA, EN = V
I
, C
o
= 10 µF,
C
(byp)
= 0.01 µF (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
TPS79201
T
J
= 25°C, 1.22 V ≤ V
O
≤ 5.2 V
O
TPS79201
0 µA < I
O
< 100 mA, 1.22 V ≤ V
O
≤ 5.2 V
(1)
0.98 V
O
1.02 V
O
TPS79225
T
J
= 25°C 2.5
Out
p
utvoltage
TPS79225
0 µA < I
O
< 100 mA, 3.5 V < V
I
< 5.5 V 2.45 2.55
V
Output voltage
TPS79228
T
J
= 25°C 2.8
V
TPS79228
0 µA < I
O
< 100 mA, 3.8 V < V
I
< 5.5 V 2.744 2.856
TPS79230
T
J
= 25°C 3
TPS79230
0 µA < I
O
< 100 mA, 4 V < V
I
< 5.5 V 2.94 3.06
Quiescent current (GND current)
0 µA < I
O
< 100 mA, T
J
= 25°C 170
µA
Quiescent current (GND current)
0 µA < I
O
< 100 mA 250
µA
Load regulation 0 µA < I
O
< 100 mA, T
J
= 25°C 5 mV
Out
p
ut voltage line regulation (∆V
O
/V
O
)
(2)
V
O
+ 1 V < V
I
≤ 5.5 V, T
J
= 25°C 0.05
%/V
Output voltage line regulation (∆V
O
/V
O
)
(2)
V
O
+ 1 V < V
I
≤ 5.5 V, 0.12
%/V
C
(byp)
= 0.001 µF 50
Out
p
ut noise voltage (TPS79228)
BW = 100 Hz to 100 kHz,
C
(byp)
= 0.0047 µF 33
µV
RMS
Output noise voltage (TPS79228)
BW
=
100
Hz
to
100
kHz
,
I
O
= 100 mA, T
J
= 25°C
C
(byp)
= 0.01 µF 31
µV
RMS
O
,
J
C
(byp)
= 0.1 µF 27
R28Ω C1F
C
(byp)
= 0.001 µF 50
Time, start-up (TPS79228)
R
L
= 28 Ω, C
o
= 1 µF,
T
J
=25
°
C
C
(byp)
= 0.0047 µF 70
µs
Time,
start u
(TPS79228)
T
J
=
25°C
C
(byp)
= 0.01 µF 90
µs
Output current limit V
O
= 0 V
(1)
285 600 mA
UVLO threshold V
CC
rising 2.25 2.65 V
UVLO hysteresis T
J
= 25°C V
CC
rising 100 mV
Standby current EN = 0 V, 2.7 V < V
I
< 5.5 V 0.7 1 µA
High level enable input voltage 2.7 V < V
I
< 5.5 V 2 V
Low level enable input voltage 2.7 V < V
I
< 5.5 V 0.7 V
Input current (EN) EN = 0 V –1 1 µA
f = 100 Hz, T
J
= 25°C, I
O
= 10 mA 70
Power su
pp
ly ri
pp
le rejection
TPS79228
f = 100 Hz, T
J
= 25°C, I
O
= 100 mA 72
dB
Power supply ripple rejection TPS79228
f = 10 kHz, T
J
= 25°C, I
O
= 100 mA 75
dB
f = 100 kHz, T
J
= 25°C, I
O
= 100 mA 47
TPS79228
I
O
= 100 mA, T
J
= 25°C 60
Dtlt
(3)
TPS79228
I
O
= 100 mA 110
V
Dropout voltag
(3)
TPS79230
I
O
= 100 mA, T
J
= 25°C 55
mV
TPS79230
I
O
= 100 mA 100
(1)
The minimum IN operating voltage is 2.7 V or V
O(typ)
+ 1 V, whichever is greater. The maximum IN voltage is 5.5 V. The maximum output current
is 100 mA.
(2)
If V
O
≤ 2.5 V then V
Imin
= 2.7 V, V
Imax
= 5.5 V:
Line regulation (mV) +
ǒ
%ńV
Ǔ
V
O
ǒ
V
Imax
* 2.7 V
Ǔ
100
1000
If V
O
≥ 2.5 V then V
Imin
= V
O
+ 1 V, V
Imax
= 5.5 V:
(3)
IN voltage equals V
O
(typ) – 100 mV; The TPS79225 dropout voltage is limited by the input voltage range limitations.