Datasheet

LM5045
www.ti.com SNVS699G –FEBRUARY 2011–REVISED MARCH 2013
Absolute Maximum Ratings
(1)
VIN to GND -0.3V to 105V
HS to GND
(2)
-5V to 105V
BST1/BST2 to GND -0.3V to 116V
BST1/BST2 to HS1/HS2 -0.3V to 16V
HO1/HO2 to HS1/HS2
(3)
-0.3V to BST1/BST2+0.3V
LO1/LO2/SR1/SR2
(3)
-0.3V to VCC+0.3V
V
CC
to GND -0.3V to 16V
REF,SSOFF,RT,OVP,UVLO to GND -0.3V to 7V
RAMP -0.3V to 7V
COMP -0.3V
COMP Input Current +10mA
All other inputs to GND
(3)
-0.3 to REF+0.3V
ESD Rating HBM
(4)
2 kV
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 ensured specifications and test conditions, see the Electrical Characteristics.
(2) The negative HS voltage must never be more negative than VCC-16V. For example, if VCC=12V, the negative transients at HS must
not exceed -4V.
(3) These pins are output pins and as such should not be connected to an external voltage source. The voltage range listed is the limits the
internal circuitry is designed to reliably tolerate in the application circuit.
(4) The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
Operating Ratings
(1)
VIN Voltage 14V to 100V
External Voltage Applied to VCC 10V to 14V
Junction Temperature -40°C to +125°C
SLOPE -0.3V to 2V
(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 ensured specifications and test conditions, see the Electrical Characteristics.
Electrical Characteristics
Limits in standard typeface are for T
J
= 25°C only; limits in boldface type apply the junction temperature range of -40°C to
+125°C. Unless otherwise specified, the following conditions apply: VIN = 48V, RT = 25kΩ, RD1=RD2=20kΩ. No load on
HO1, HO2, LO1, LO2, SR1, SR2, COMP=0V, UVLO=2.5V, OVP=0V, SSOFF=0V.
Symbol Parameter Conditions Min Typ Max Units
Startup Regulator (VCC pin)
V
CC1
VCC voltage I
CC
= 10mA (SSSR<1V) 9.3 9.6 9.9 V
V
CC2
VCC voltage I
CC
= 10mA (SSSR>1V) 7.5 7.8 8.1 V
I
CC(Lim)
VCC current limit V
CC
= 6V 60 80 mA
I
CC(ext)
VCC supply current Supply current into VCC from an externally 4.6 mA
applied source. V
CC
= 10V
VCC load regulation I
CC
from 0 to 50 mA 35 mV
V
CC(UV)
VCC under-voltage threshold Positive going VCC V
CC1
–0. V
CC1
–0. V
2 1
VCC under-voltage threshold Negative going VCC 5.9 6.3 6.7 V
I
IN
VIN operating current 4 mA
VIN shutdown current V
IN
=20V, V
UVLO
=0V 300 520 µA
V
VIN
=100V, V
UVLO
=0V 350 550 µA
VIN start-up regulator leakage V
CC
=10V 160 µA
Voltage Reference Regulator (REF pin)
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