Datasheet

LM25116
SNVS509D –APRIL 2007–REVISED FEBRUARY 2013 www.ti.com
Electrical Characteristics (continued)
Limits in standard type are for T
J
= 25°C only; limits in boldface type apply over the junction temperature range of -40°C to
+125°C and are provided for reference only. Unless otherwise specified, the following conditions apply: VIN = 24V, VCC =
7.4V, VCCX = 0V, EN = 5V, R
T
= 16 kΩ, no load on LO and HO.
Symbol Parameter Conditions Min Typ Max Unit
RAMP Generator
I
R1
RAMP Current 1 VIN = 40V, VOUT=10V 150 180 220 µA
I
R2
RAMP Current 2 VIN = 10V, VOUT = 10V 21 28 35 µA
VOUT Bias Current VOUT = 36V 200 µA
RAMP Output Low Voltage VIN = 40V, VOUT = 10V 265 mV
Diode Emulation
SW Zero Cross Threshold -6 mV
DEMB Output Current DEMB = 0V, SS = 1.25V 1.6 2.7 3.8 µA
DEMB Output Current DEMB =0V, SS = 2.8V 28 38 48 µA
DEMB Output Current DEMB = 0V, SS = Regulated by FB 45 65 85 µA
LO Gate Driver
V
OLL
LO Low-state Output Voltage I
LO
= 10 mA 0.08 0.17 V
V
OHL
LO High-state Output Voltage I
LO
= -100 mA, V
OHL
= V
CC
- V
LO
0.25 V
LO Rise Time C-load = 1000 pF 18 ns
LO Fall Time C-load = 1000 pF 12 ns
I
OHL
Peak LO Source Current V
LO
= 0V 1.8 A
I
OLL
Peak LO Sink Current V
LO
= VCC 3.5 A
HO Gate Driver
V
OLH
HO Low-state Output Voltage I
HO
= 100 mA 0.17 0.27 V
V
OHH
HO High-state Output Voltage I
HO
= -100 mA, V
OHH
= V
HB
- V
HO
0.45 V
HO Rise Time C-load = 1000 pF 19 ns
HO High-side Fall Time C-load = 1000 pF 13 ns
I
OHH
Peak HO Source Current V
HO
= 0V 1 A
I
OLH
Peak HO Sink Current V
HO
= VCC 2.2 A
HB to SW under-voltage 3 V
Switching Characteristics
LO Fall to HO Rise Delay C-load = 0 75 ns
HO Fall to LO Rise Delay C-load = 0 70 ns
Thermal
T
SD
Thermal Shutdown Rising 170 °C
Thermal Shutdown Hysteresis 15 °C
θ
JA
Junction to Ambient 40 °C/W
θ
JC
Junction to Case 4 °C/W
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