Datasheet

TPS2554
TPS2555
SLVSAM0 – JUNE 2011 www.ti.com
ELECTRICAL CHARACTERISTICS
Conditions are -40°C ≤ T
J
≤ 125°C unless otherwise noted V
EN
(if TPS2554) = V
IN
= 5 V, V
EN
(if TPS2555) = 0 V, R
FAULT
= 10
kΩ, R
ILIM0
= 210 kΩ, R
ILIM1
= 20 kΩ, ILIM_SEL = 0 V unless otherwise noted. Positive currents are into pins. Typical values
are at 25 °C. All voltages are with respect to GND unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Power Switch
I
OUT
= 2 A, V
ILIM_SEL
= Logic HI 73 120
I
OUT
= 100 mA, V
ILIM_SEL
= Logic LO 73 120
Static drain-source on-state
-40 °C ≤ T
A
= T
J
≤ 85 °C, I
OUT
= 2 A, V
ILIM_SEL
R
DS(on)
mΩ
73 105
resistance
= Logic HI
T
A
= T
J
= 25 °C, I
OUT
= 2 A, V
ILIM_SEL
= Logic
73 84
HI
t
r
Rise time, output C
L
= 1 µF, R
L
= 100 Ω 1 1.5
ms
t
f
Fall time, output C
L
= 1 µF, R
L
= 100 Ω 0.2 0.5
R
DIS
OUT discharge resistance 400 500 630 Ω
V
OUT
= 5.5 V, V
IN
= V
EN
= 0 V or V
OUT
= V
EN
I
REV
Reverse leakage current 0 1 µA
= 5.5 V, V
IN
= 0 V, T
J
= 25 °C
Enable Input EN (TPS2554), Enable Input
EN (TPS2555)
V
EN
, V
EN
EN, EN pin threshold, falling 0.9 1.1 1.65 V
V
EN_HYS
EN, EN Hysteresis 200 mV
I
EN
, I
EN
Input current V
EN
, V
EN
= 0 V or 5.5 V -0.5 0.5 µA
t
ON
Turn-on time C
L
= 1 µF, R
L
= 100 Ω 3.4 5
ms
t
OFF
Turn-off time C
L
= 1 µF, R
L
= 100 Ω 1.7 3
Current Limit
V
ILIM_SEL
ILIM_SEL threshold, falling 0.9 1.1 1.65 V
V
ILIM_HYS
I
LIM_SEL
Hysteresis 200 mV
ILIM_SEL input current V
ILIM_SEL
= 0 V or 5.5 V -0.5 0.5 µA
R
ILIM0
= 210 kΩ 185 230 265
V
ILIM_SEL
= Logic LO
R
ILIM0
= 100 kΩ 420 480 530
Maximum DC output current from
I
SHORT
mA
IN to OUT
R
ILIM1
= 20 kΩ 2150 2430 2650
V
ILIM_SEL
= Logic HI
R
ILIM1
= 16.9 kΩ 2550 2840 3100
t
IOS
Response time to short circuit V
IN
= 5.0 V 1.5 µs
Supply Current
V
EN
= 0 V, V
EN
= V
IN
; OUT grounded; -40 °C ≤
I
CCL
Supply current, switch disabled 0.1 3.8
T
J
≤ 85 °C
90 115 µA
I
CCH
Supply current, operating V
EN
= 0 V, V
EN
= V
IN
V
ILIM_SEL
=
110 135
Logic HI
Undervoltage Lockout
V
UVLO
Low-level input voltage, IN V
IN
rising 3.9 4.1 4.3 V
Hysteresis, IN 100 mV
FAULT
Output low voltage, FAULT I
FAULT
= 1 mA 100 mV
Off-state leakage V
FAULT
= 5.5 V 1 µA
FAULT assertion or negation due to
FAULT deglitch 5 8.5 12 ms
overcurrent condition
Thermal Shutdown
Thermal shutdown threshold 155
Thermal shutdown threshold in
135 °C
current-limit
Hysteresis 10
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