Datasheet

Lineregulation(mV)=(%/V)x V
o
x1000
(V 2.7)
100
-
Imax
x1000
[ V (V +1) ]
100
-
Imax o
Lineregulation(mV)=(%/V)x V
o
(3) If V
O
< 1.8 V then V
Imax
= 6 V, V
Imin
= 2.7 V:
If V
O
> 2.5 V then V
Imax
= 6 V, V
Imin
= V
O
+ 1 V:
TPS70445, TPS70448
TPS70451, TPS70458
TPS70402
www.ti.com SLVS307F –SEPTEMBER 2000–REVISED APRIL 2010
ELECTRICAL CHARACTERISTICS
Over recommended operating junction temperature range (T
J
= –40°C to +125°C), V
IN1
or V
IN2
= V
OUT(nom)
+ 1 V, I
O
= 1 mA,
EN = 0 V, C
OUT1
= 22 mF, and C
OUT2
= 47 mF (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
2.7 V < V
IN
< 6 V,
FB connected to V
O
1.22
Reference
T
J
= +25°C
voltage
2.7 V < V
IN
< 6 V, FB connected to V
O
1.196 1.244
2.7 V < V
IN
< 6 V, T
J
= +25°C 1.2
1.2 V Output
(V
OUT2
)
2.7 V < V
IN
< 6 V, 1.176 1.224
2.7 V < V
IN
< 6 V, T
J
= +25°C 1.5
1.5 V Output
Output
(V
OUT2
)
2.7 V < V
IN
< 6 V, 1.47 1.53
V
O
voltage
(1) ,
V
(2)
2.8 V < V
IN
< 6 V, T
J
= +25°C 1.8
1.8 V Output
(V
OUT2
)
2.8 V < V
IN
< 6 V, 1.764 1.836
3.5 V < V
IN
< 6 V, T
J
= +25°C 2.5
2.5 V Output
(V
OUT2
)
3.5 V < V
IN
< 6 V, 2.45 2.55
4.3 V < V
IN
< 6 V, T
J
= +25°C 3.3
3.3 V Output
(V
OUT2
)
4.3 V < V
IN
< 6 V, 3.234 3.366
Quiescent current (GND current) for See
(2)
T
J
= +25°C 185
regulator 1 and regulator 2, EN1 = EN2 mA
See
(2)
250
= 0 V
(1)
V
O
+ 1 V < V
IN
≤ 6 V, T
J
= +25°C
(1)
0.01
Output voltage line regulation (∆V
O
/V
O
)
%V
for regulator 1 and regulator 2
(3)
V
O
+ 1 V < V
IN
≤ 6 V
(1)
0.1
Load regulation for V
OUT 1
and V
OUT2
T
J
= +25°C 1 mV
Output noise Regulator 1 79
V
n
voltage BW = 300 Hz to 50 kHz, C
O
= 33 mF, T
J
= +25°C mV
RMS
Regulator 2 77
(TPS70451)
Regulator 1 1.75 2.2
Output current limit V
OUT
= 0 V A
Regulator 2 3.8 4.5
Thermal shutdown junction temperature +150 °C
Regulator 1 EN1 = V
IN
, EN2 = V
IN
T
J
= +25°C 1 2
I
I
Standby
mA
(standby) current
Regulator 2 EN1 = V
IN
, EN2 = V
IN
10
Power- Regulator 1 f = 1 kHz T
J
= +25°C
(1)
65
supply ripple
PSRR dB
rejection
Regulator 2 f = 1 kHz T
J
= +25°C
(1)
60
(TPS70451)
RESET Terminal
Minimum input voltage for valid RESET I
RESET
= 300 mA, V
(RESET)
≤ 0.8 V 1.0 1.3 V
t
(RESET)
RESET pulse duration 80 120 160 ms
Output low voltage V
IN
= 3.5 V, I
(RESET)
= 1 mA 0.15 0.4 V
Leakage current V
(RESET)
= 6 V 1 mA
(1) Minimum input operating voltage is 2.7 V or V
O(typ)
+ 1 V, whichever is greater. Maximum input voltage = 6 V, minimum output
current = 1 mA.
(2) I
O
= 1 mA to 1 A for Regulator 1 and 1 mA to 2 A for Regulator 2.
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