Datasheet

LM34914
www.ti.com SNVS453B –MAY 2006–REVISED MARCH 2013
Absolute Maximum Ratings
(1)(2)
VIN to RTN 44V
BST to RTN 52V
SW to RTN (Steady State) -1.5V
BST to VCC 44V
VIN to SW 44V
BST to SW 14V
VCC to RTN 14V
SGND to RTN -0.3V to +0.3V
Current out of ISEN See text
SS to RTN -0.3V to 4V
All Other Inputs to RTN -0.3 to 7V
ESD Rating
(3)
Human Body Model 2kV
Storage Temperature Range -65°C to +150°C
JunctionTemperature 150°C
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For specifications and test conditions, see Electrical Characteristics.
(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 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
Operating Ratings
(1)
VIN Voltage 8.0V to 40V
Junction Temperature −40°C to + 125°C
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For specifications and test conditions, see Electrical Characteristics.
Electrical Characteristics
Limits in standard type are for T
J
= 25°C only; limits in boldface type apply over the junction temperature (T
J
) range of -40°C
to +125°C. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent
the most likely parametric norm at T
J
= 25°C, and are provided for reference purposes only. Unless otherwise stated the
following conditions apply: V
IN
= 12V, R
ON
= 200kΩ
(1)(2)
.
Symbol Parameter Conditions Min Typ Max Units
Start-Up Regulator, V
CC
V
CC
Reg V
CC
regulated output Vin > 9V 6.6 7.0 7.4 V
I
CC
= 0 mA,
V
IN
-V
CC
dropout voltage 1.3 V
V
CC
= UVLO
VCC
+ 250 mV
V
CC
output impedance V
IN
= 8V 155
Ω
(0 mA ≤ I
CC
≤ 5 mA)
V
IN
= 40V 0.16
V
CC
current limit
(3)
V
CC
= 0V 11 mA
UVLO
VCC
V
CC
under-voltage lockout
V
CC
increasing 5.7 V
threshold
UVLO
VCC
hysteresis V
CC
decreasing 150 mV
UVLO
VCC
filter delay 100 mV overdrive 3 µs
I
IN
operating current Non-switching, FB = 3V 0.57 0.85 mA
I
IN
shutdown current RON/SD = 0V 80 160 µA
(1) For detailed information on soldering plastic WSON packages, visit www.ti.com/packaging.
(2) Typical specifications represent the most likely parametric norm at 25°C operation.
(3) V
CC
provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading
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