Datasheet

LM2743
www.ti.com SNVS276G –APRIL 2004–REVISED MARCH 2013
Absolute Maximum Ratings
(1)(2)
V
CC
-0.3 to 7V
BOOT Voltage -0.3 to 21V
I
SEN
-0.3 to 9.5V
All other pins -0.3 to V
CC
+ 0.3V
Junction Temperature 150°C
Storage Temperature −65°C to 150°C
Lead Temperature (soldering, 10sec) 260°C
Soldering Information
Infrared or Convection (20sec) 235°C
ESD Rating
(3)
2 kV
(1) Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for
which the device operates correctly. Operating Ratings do not imply specified performance limits.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin.
Operating Ratings
Supply Voltage Range (V
CC
) 3V to 6V
Junction Temperature Range (T
J
) −40°C to +125°C
Thermal Resistance (θ
JA
) 155°C/W
Electrical Characteristics
(1)
V
CC
= 3.3V unless otherwise indicated. Typicals and limits appearing in plain type apply for T
A
= T
J
= 25°C. Limits appearing in
boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are specified by design,
test, or statistical analysis.
Symbol Parameter Conditions Min Typ Max Units
V
FB
FB Pin Voltage V
CC
= 3V to 6V 0.588 0.6 0.612 V
V
ON
UVLO Thresholds Rising 2.76
V
Falling 2.42
V
CC
= 3.3V, V
SD
= 3.3V
1.0 1.5 2.1
Fsw = 600kHz
Operating V
CC
Current mA
I
Q_VCC
V
CC
= 5V, V
SD
= 3.3V
1.0 1.7 2.1
Fsw = 600kHz
Shutdown V
CC
Current V
CC
= 3.3V, V
SD
= 0V 110 185 µA
t
PWGD1
PWGD Pin Response Time V
FB
Rising 6 µs
t
PWGD2
PWGD Pin Response Time V
FB
Falling 6 µs
I
SS-ON
SS Pin Source Current V
SS
= 0V 7 10 14 µA
I
SS-OC
SS Pin Sink Current During Over V
SS
= 2.5V
90 µA
Current
I
SEN-TH
I
SEN
Pin Source Current Trip Point 25 40 55 µA
ERROR AMPLIFIER
GBW Error Amplifier Unity Gain
9 MHz
Bandwidth
G Error Amplifier DC Gain 106 dB
SR Error Amplifier Slew Rate 3.2 V/µs
I
EAO
EAO Pin Current Sourcing and V
EAO
= 1.5, FB = 0.55V 2.6
mA
Sinking Capability V
EAO
= 1.5, FB = 0.65V 9.2
V
EA
Error Amplifier Output Voltage Minimum 1 V
Maximum 2 V
(1) The power MOSFETs can run on a separate 1V to 16V rail (Input voltage, V
IN
). Practical lower limit of V
IN
depends on selection of the
external MOSFET.
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