Datasheet

TPS70445, TPS70448
TPS70451, TPS70458
TPS70402
SLVS307F –SEPTEMBER 2000–REVISED APRIL 2010 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
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
V
IN1
/V
IN2
Terminal
UVLO threshold 2.4 2.65 V
UVLO hysteresis 110 mV
PG1/PG2 Terminal
Minimum input voltage for valid PGx I
(PGx)
= 300 mA, V
(PGx)
≤ 0.8 V 1.0 1.3 V
Trip threshold voltage V
O
decreasing 92 95 98 %V
OUT
Hysteresis voltage Measured at V
O
0.5 %V
OUT
t
r(PGx)
Rising edge deglitch 30 ms
Output low voltage V
IN
= 2.7V, I
(PGx)
= 1 mA 0.15 0.4 V
Leakage current V
(PGx)
= 6V 1 mA
EN1/EN2 Terminal
High-level ENx input voltage 2 V
Low-level ENx input voltage 0.7 V
Input current (ENx) –1 1 mA
MR Terminal
High-level input voltage 2 V
Low-level input voltage 0.7 V
Pull-up current source 6 mA
V
OUT1
Terminal
I
O
= 1 A, V
IN1
= 3.2 V T
J
= +25°C 160
Dropout voltage
(4)
mV
I
O
= 1 A, V
IN1
= 3.2 V 250
Peak output current 2 ms pulse width 1.2 A
Discharge transistor current V
OUT1
= 1.5 V 7.5 mA
V
OUT2
Terminal
Peak output current 2 ms pulse width 3 A
Discharge transistor current V
OUT2
= 1.5 V 7.5 mA
FB Terminal
Input current: TPS70402 FB = 1.8 V 1 mA
(4) Input voltage (V
IN1
or V
IN2
) = V
O(typ)
– 100 mV. For 1.5-V, 1.8-V, and 2.5-V regulators, the dropout voltage is limited by input voltage
range. The 3.3-V regulator input is set to 3.2 V to perform this test.
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