Datasheet

LM34910C
www.ti.com SNVS517B –MAY 2007–REVISED MARCH 2013
Absolute Maximum Ratings
(1)(2)
V
IN
to GND 55V
BST to GND 70V
SW to GND (Steady State) -1.5V
ESD Rating
(3)
Human Body Model 2kV
BST to V
CC
55V
V
IN
to SW 55V
BST to SW 14V
V
CC
to GND 14V
S
GND
to RTN -0.3V to +0.3V
Current out of I
SEN
See Text
SS to RTN -0.3V to 4V
All Other Inputs to GND -0.3 to 7V
Storage Temperature Range -55°C to +150°C
Junction Temperature 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 the 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)
V
IN
8.0V to 50V
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 the Electrical Characteristics.
Electrical Characteristics
Specifications with standard typeface are for T
J
= 25°C, and those with boldface type apply over full Operating Junction
Temperature range. V
IN
= 24V, R
ON
= 200k unless otherwise stated
(1)
.
Symbol Parameter Conditions Min Typ Max Units
Start-Up Regulator, V
CC
V
CC
Reg V
CC
regulated output 6.6 7 7.4 V
I
CC
= 0 mA,
V
IN
-V
CC
dropout voltage 1.4 V
V
CC
= V
CC
Reg - 100 mV
V
CC
output impedance 0 mA ≤ I
CC
≤ 5 mA 140 Ω
V
CC
current limit
(2)
V
CC
= 0V 9 mA
UVLO
VCC
V
CC
under-voltage lockout
V
CC
increasing 5.8 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 0.63 1 mA
I
IN
shutdown current R
ON
/SD = 0V 80 250 µA
Switch Characteristics
Rds(on) Buck Switch Rds(on) I
TEST
= 200 mA 0.45 0.95 Ω
UVLO
GD
Gate Drive UVLO V
BST
- V
SW
Increasing 3.0 4.3 5.5 V
UVLO
GD
hysteresis 440 mV
(1) Typical specifications represent the most likely parametric norm at 25°C operation.
(2) V
CC
provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading
Copyright © 2007–2013, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Links: LM34910C