Datasheet
RECOMMENDED OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
TPS2550
TPS2551
www.ti.com
........................................................................................................................................ SLVS736B – FEBRUARY 2008 – REVISED NOVEMBER 2008
MIN MAX UNIT
V
IN
Input voltage, IN 2.5 6.5 V
V
EN
TPS2550 0 6.5
Enable voltage V
V
/EN
TPS2551 0 6.5
I
OUT
Continuous output current, OUT 0 1.1 A
R
ILIM
Current-limit set resistor from ILIM to GND 14.3 80.6 k Ω
I
/FAULT
FAULT sink current 0 10 mA
Operating virtual junction
T
J
DRV & DBV – 40 125 ° C
temperature
over recommended operating junction temperature range, 2.5 V ≤ V
IN
≤ 6.5 V, R
ILIM
= 14.3 k Ω , V
/EN
= 0 V, or V
EN
= 5.0 V
(unless otherwise noted)
PARAMETER TEST CONDITIONS
(1)
MIN TYP MAX UNIT
POWER SWITCH
DBV package, T
J
= 25 ° C 85 95
DBV package, – 40 ° C ≤ T
J
≤ 125 ° C 135
r
DS(on)
Static drain-source on-state resistance DRV package, T
J
= 25 ° C 100 115 m Ω
DRV package, – 40 ° C ≤ T
J
≤ 105 ° C 145
DRV package, – 40 ° C ≤ T
J
≤ 125 ° C 150
V
IN
= 6.5 V 1.0 1.5
t
r
Rise time, output
V
IN
= 2.5 V 0.65 1.0
C
L
= 1 µ F, R
L
= 100 Ω ,
ms
(see Figure 2 )
V
IN
= 6.5 V 0.2 0.5
t
f
Fall time, output
V
IN
= 2.5 V 0.2 0.5
ENABLE INPUT EN OR EN
V
IH
High-level input voltage 1.1
V
V
IL
Low-level input voltage 0.66
I
EN
Input current V
EN
= 0 V or 6.5 V, V
/EN
= 0 V or 6.5 V – 0.5 0.5 µ A
t
on
Turnon time 3 ms
C
L
= 1 µ F, R
L
= 100 Ω , (see Figure 2 )
t
off
Turnoff time 3 ms
CURRENT LIMIT
R
ILIM
= 80.6 k Ω 110 215 300
I
OS
Short-circuit current, OUT connected to GND R
ILIM
= 38.3 k Ω 300 500 650
R
ILIM
= 15 k Ω 1050 1400 1650
mA
R
ILIM
= 80.6 k Ω 290 315 340
I
OC
Current-limit threshold (Maximum DC output current I
OUT
delivered to load) R
ILIM
= 38.3 k Ω 620 665 705
R
ILIM
= 15 k Ω 1550 1650 1750
t
IOS
Response time to short circuit V
IN
= 5.0 V (see Figure 3 ) 2 µ s
REVERSE-VOLTAGE PROTECTION
Reverse-voltage comparator trip point
95 135 190 mV
(V
OUT
– V
IN
)
Time from reverse-voltage condition to
V
IN
= 5.0 V 3 5 7 ms
MOSFET turn off
SUPPLY CURRENT
V
IN
= 6.5 V, No load on OUT, V
EN
= 6.5 V or V
EN
= 0 V, 14.3 k Ω
I
IN_off
Supply current, low-level output 0.1 1 µ A
≤ R
ILIM
≤ 80.6 k Ω
R
ILIM
= 15 k Ω 150 µ A
V
IN
= 6.5 V, No load on OUT, V
EN
= 0 V or
I
IN_on
Supply current, high-level output
V
EN
= 6.5 V
R
ILIM
= 80.6 k Ω 130 µ A
I
REV
Reverse leakage current V
OUT
= 6.5 V, V
IN
= 0 V T
J
= 25 ° C 0.01 1 µ A
(1) Pulse-testing techniques maintain junction temperature close to ambient temperature; thermal effects must be taken into account
separately.
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