Datasheet

www.ti.com
TPS40040 , TPS40041
SLUS700D – MARCH 2006 – REVISED DECEMBER 2007
ELECTRICAL CHARACTERISTICS (continued)
T
J
= -40 C to 85C VDD = 5 V, (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Soft Start/Enable
Calibration time before softstart
t
CAL
(2)
1.0 1.6 2.5
begins
ms
t
SS
(2)
Soft start time FB rise time from 0 V to 600 mV 3.0 4.0 6.0
t
REG
Time to voltage regulation Sum of t
CAL
plus t
SS
4.0 5.6 8.5
V
EN
Enable threshold EN voltage w.r.t. VDD -0.8 -1.2 -1.6 V
V
ENHYS
Enable hysteresis 50 mV
Bootstrap
R
BOOT3V3
V
BOOT
to VDD, VDD = 3.3 V 50
Bootstrap switch resistances Ω
R
BOOT5V
V
BOOT
to VDD, VDD = 5 V 30
Output Driver
V
BOOT
- V
SW
= 3.3 V, I
SRCE
= 100
R
HDHI3V3
HDRV pull-up resistance 3.0 5.5
mA
R
HDLO3V3
HDRV pull-down resistance V
BOOT
- V
SW
= 3.3 V, I
SINK
= 100 mA 1.5 3
Ω
R
LDHI3V3
LDRV pull-up resistance VDD = 3.3 V, I
SOURCE
= 100 mA 3.0 5.5
R
LDLO3V3
LDRV pull-down resistance VDD = 3.3 V, I
SINK
= 100 mA 1.0 2.0
t
RISE
(3)
LDRV, HDRV rise time C
LOAD
= 1 nF 15 35
t
FALL
(3)
LDRV, HDRV fall time C
LOAD
= 1 nF 10 25
ns
T
DEAD
HL Adaptive timing HDRV to LDRV No load 15 30
T
DEAD
LH Adaptive timing LDRV to HDRV No load 5 15
SW Node
I
LEAK
Leakage current EN = VDD -2 µ A
Thermal Shutdown
t
SD
(3)
Shutdown temperature 145
C
Hysteresis 15
(2) t
CAL
and t
SS
track with temperature and input voltage
(3) Ensured by design. Not production tested.
4 Copyright © 2006 – 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS40040 TPS40041