Datasheet
TPS70345, TPS70348
TPS70351, TPS70358
TPS70302
www.ti.com
SLVS285H –AUGUST 2000–REVISED APRIL 2010
ELECTRICAL CHARACTERISTICS (continued)
Over recommended operating junction temperature range (T
J
= –40°C to +125°C), V
IN1
or V
IN2
= V
OUTX(nom)
+ 1V, I
OUTX
= 1mA,
EN = 0V, C
OUT1
= 22mF, and C
OUT2
= 47mF (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
OUT1
Terminal
V
OUT1
UV comparator: positive-going
input threshold voltage at V
OUT2
UV 80 83 86 %V
OUT
comparator
%V
OUT
,
V
OUT1
UV comparator: hysteresis 3
mV
V
OUT1
UV comparator: falling edge
V
SENSE1
decreasing below threshold 140 ms
deglitch
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 2ms pulse width 1.2 A
Discharge transistor current V
OUT1
= 1.5 V 7.5 mA
V
IN1
/V
IN2
Terminal
UVLO threshold 2.3 2.65 V
UVLO hysteresis 110 mV
FB Terminal
Input current: TPS70302 FB = 1.8 V 1 mA
(4) Input voltage (V
IN1
or V
IN2
) = V
O(typ)
– 100mV. 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.
TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NAME NO.
EN 7 I Active low enable
GND 9 — Regulator ground
GND/HEATSI
1, 12, 13, 24 — Ground/heatsink
NK
MR1 6 I Manual reset input 1, active low, pulled up internally
MR2 5 I Manual reset input 2, active low, pulled up internally
NC 4, 17, 20 — No connection
PG1 19 O Open drain output, low when V
OUT1
voltage is less than 95% of the nominal regulated voltage
RESET 18 O Open drain output, SVS (power-on reset) signal, active low
Power-up sequence control: SEQ = High, V
OUT2
powers up first; SEQ = Low, V
OUT1
powers up
SEQ 8 I
first. SEQ terminal pulled up internally.
V
IN1
2, 3 I Input voltage of regulator 1
V
IN2
10, 11 I Input voltage of regulator 2
V
OUT1
22, 23 O Output voltage of regulator 1
V
OUT2
14, 15 O Output voltage of regulator 2
V
SENSE2
/FB2 16 I Regulator 2 output voltage sense/regulator 2 feedback for adjustable
V
SENSE1
/FB1 21 I Regulator 1 output voltage sense/regulator 1 feedback for adjustable
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