TPS70145, TPS70148
TPS70151, TPS70158
TPS70102
SLVS222D – DECEMBER 1999 – REVISED NOVEMBER 2004
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ELECTRICAL CHARACTERISTICS (continued)
Over recommended operating junction temperature range (T
J
= -40°C to +125°C), V
IN1
or V
IN2
= V
OUT(nom)
+ 1V, I
O
= 1mA,
EN = 0, C
O
= 33µF, (unless otherwise noted).
PARAMETER
Dropout voltage
(4)
Dropout
voltage
(4)
Peak output current
(4)
Discharge transistor current
UVLO threshold
FB Terminal
Input current: TPS70102
(4)
FB = 1.8V
1
µA
I
O
= 500mA,
2ms pulse width
V
OUT1
= 1.5V
2.4
TEST CONDITIONS
I
O
= 500mA, T
J
= 25°C
V
IN1
= 3.2V
V
IN1
= 3.2V
750
7.5
2.65
MIN
TYP
170
275
MAX
UNIT
mV
mV
mA
mA
V
Input voltage (V
IN1
or V
IN2
) = V
O(typ)
- 100mV. For 1.5V, 1.8V and 2.5V regulators, the dropout voltage is limited by input voltage range.
The 3.3V regulator input is set to 3.2V to perform this test.
DEVICE INFORMATION
Fixed Voltage Version
V
IN1
(2 Pins)
Current
Sense
10 kΩ
ENA_1
V
SENSE1
(see Note
A)
V
OUT1
(2 Pins)
UVLO
V_UVLO
GND
Shutdown
−
Thermal
Shutdown
Reference
V
ref
V
ref
+
ENA_
1
FB1
PG1
FB1
0.95
×
V
ref
Rising Edge
Deglitch
V
IN1
Shutdown
UV Comp
FB2
0.83
×
V
ref
FB1
0.83
×
V
ref
UV Comp
EN
V
CC
Falling Edge
Deglitch
FB2
0.95
×
V
ref
Power
Sequence
Logic
ENA_1
ENA_2
MR2
PG1 Comp
Rising Edge
Deglitch
Falling Edge
Delay
V
IN1
RESET
Falling Edge
Deglitch
V
ref
FB2
MR1
−
+
ENA_2
ENA_2
10 kΩ
V
SENSE2
(see Note
A)
V
OUT2
(2 Pins)
SEQ
(see Note B)
V
IN2
(2 Pins)
Current
Sense
A.
For most applications, V
SENSE1
and V
SENSE2
should be externally connected to V
OUT
as close as possible to the
device. For other implementations, refer to SENSE terminal connection discussion in the
Application Information
section.
If the SEQ terminal is floating at the input, V
OUT2
powers up first.
B.
6
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