TPS70445, TPS70448
TPS70451, TPS70458
TPS70402
www.ti.com
SLVS307F –SEPTEMBER 2000–REVISED APRIL 2010
ELECTRICAL CHARACTERISTICS
Over recommended operating junction temperature range (TJ = –40°C to +125°C), VIN1 or VIN2 = VOUT(nom) + 1 V, IO = 1 mA,
EN = 0 V, COUT1 = 22 mF, and COUT2 = 47 mF (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
2.7 V < VIN < 6 V,
TJ = +25°C
FB connected to VO
1.22
Reference
voltage
2.7 V < VIN < 6 V,
2.7 V < VIN < 6 V,
2.7 V < VIN < 6 V,
2.7 V < VIN < 6 V,
2.7 V < VIN < 6 V,
2.8 V < VIN < 6 V,
2.8 V < VIN < 6 V,
3.5 V < VIN < 6 V,
3.5 V < VIN < 6 V,
4.3 V < VIN < 6 V,
4.3 V < VIN < 6 V,
FB connected to VO
TJ = +25°C
1.196
1.176
1.47
1.244
1.224
1.2
1.5
1.8
2.5
3.3
185
1.2 V Output
(VOUT2
)
TJ = +25°C
TJ = +25°C
TJ = +25°C
TJ = +25°C
TJ = +25°C
1.5 V Output
(VOUT2
Output
)
(1) ,
1.53
1.836
2.55
VO
voltage
V
(2)
1.8 V Output
(VOUT2
)
1.764
2.45
2.5 V Output
(VOUT2
)
3.3 V Output
(VOUT2
)
3.234
3.366
(2)
Quiescent current (GND current) for
regulator 1 and regulator 2, EN1 = EN2
= 0 V(1)
See
mA
(2)
See
250
0.1
VO + 1 V < VIN ≤ 6 V,
VO + 1 V < VIN ≤ 6 V
TJ = +25°C
TJ = +25°C(1)
(1)
0.01
Output voltage line regulation (∆VO/VO)
for regulator 1 and regulator 2
%V
mV
(3)
Load regulation for VOUT 1 and VOUT2
Output noise Regulator 1
1
79
Vn
voltage
(TPS70451)
BW = 300 Hz to 50 kHz,
VOUT = 0 V
CO = 33 mF, TJ = +25°C
mVRMS
Regulator 2
77
Regulator 1
Regulator 2
1.75
3.8
2.2
4.5
Output current limit
A
Thermal shutdown junction temperature
+150
1
°C
mA
Regulator 1
Regulator 2
Regulator 1
EN1 = VIN, EN2 = VIN
EN1 = VIN, EN2 = VIN
f = 1 kHz
TJ = +25°C
2
II
Standby
(standby) current
10
Power-
TJ = +25°C(1)
TJ = +25°C(1)
65
60
supply ripple
rejection
PSRR
dB
Regulator 2
f = 1 kHz
(TPS70451)
RESET Terminal
Minimum input voltage for valid RESET IRESET = 300 mA,
V
(RESET) ≤ 0.8 V
1.0
120
1.3
160
0.4
1
V
ms
V
t (RESET)
RESET pulse duration
80
Output low voltage
Leakage current
VIN = 3.5 V,
I(RESET) = 1 mA
0.15
V(RESET) = 6 V
mA
(1) Minimum input operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater. Maximum input voltage = 6 V, minimum output
current = 1 mA.
(2) IO = 1 mA to 1 A for Regulator 1 and 1 mA to 2 A for Regulator 2.
(VImax - 2.7)
Line regulation (mV) = (%/V) x Vo
x 1000
100
[VImax - (Vo + 1)]
(3) If VO < 1.8 V then VImax = 6 V, VImin = 2.7 V:
Line regulation (mV) = (%/V) x Vo
x 1000
100
If VO > 2.5 V then VImax = 6 V, VImin = VO + 1 V:
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