TPS2346
SLUS529 MAY 2002
5
www.ti.com
electrical characteristics V
I(VIN1)
= 5.15 V, V
I(VIN2)
= 5 V, V
I(VIN3)
= 3.3 V, V
I(VIN4)
= 5.2 V,
T
A
= 40_C to 85_C (unless otherwise noted) (continued)
PG
output
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
I
OH
Highlevel output (leakage) current
V
I(ENABLE
)
= 5 V,
V
OH
= 5 V
1
礎
V
OL
Low-level output voltage
V
I(ENABLE
)
= 0 V,
I
SINK
= 0.1 mA
0.5
V
I
OL
Low-level output (sink) current
V
I(ENABLE
)
= 0 V,
V
OL
= 0.5 V
4
10
mA
Terminal Functions
TERMINAL
NAME
NO.
I/O
DESCRIPTION
AGND
18
I
Analog ground
ENABLE
6
I
Logic low enable input for back-end power
CPGND
19
I
Charge pump ground
CPUMP
20
I/O
Charge pump resevoir capacitor connection
CS1
4
I
Channel 1 (5.15-V) current sense input
CS2
21
I
Channel 2 (5-V) current sense input
CS3
9
I
Channel 3 (3.3-V) current sense input
CS4
16
I
Channel 4 (5.2-V) current sense input
GATE1
1
O
Gate drive for Channel 1 (5.15-V) external pass FET
GATE2
24
O
Gate drive for Channel 2 (5-V) external pass FET
GATE3
12
O
Gate drive for Channel 3 (3.3-V) external pass FET
GATE4
13
O
Gate drive for Channel 4 (5.2-V) external pass FET
PG
17
O
Open drain output asserted low for back-end power good
IRAMP
5
O
Current ramp programming pin
PRECHG
8
O
Bias supply of 1V for bus signal precharge
RGND
7
I
Reference ground
VIN1
3
I
Channel 1 supply (5.15-V) input voltage sense
VIN2
22
I
Channel 2 supply (5-V) input voltage sense
VIN3
10
I
Channel 3 supply (3.3-V) input voltage sense
VIN4
15
I
Channel 4 supply (5.2-V) input voltage sense
VS1
2
I
5.15-V supply back-end voltage sense
VS2
23
I
5-V supply back-end voltage sense
VS3
11
I
3.3-V supply back-end voltage sense
VS4
14
I
5.2-V supply back-end voltage sense
DISSIPATION RATING TABLE
PACKAGE
T
A
25_C
DERATING FACTOR
T
A
=
85_C
TSSOP (PW)
800 mW
10 mW/_C
200 mW
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