Datasheet

LM5022
www.ti.com SNVS480G –JANUARY 2007–REVISED DECEMBER 2013
Electrical Characteristics
(1)
(continued)
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. V
IN
= 24V and R
T
= 27.4 kΩ
unless otherwise indicated.
Parameter Test Conditions Min Typ Max Units
OSCILLATOR
RT to GND = 84.5 kΩ
(4)
170 200 230 kHz
f
SW
RT to GND = 27.4 kΩ
(4)
525 600 675 kHz
RT to GND = 16.2 kΩ
(4)
865 990 1115 kHz
V
SYNC-HI
Synchronization Rising Threshold 3.8 V
PWM COMPARATOR
V
COMP
= 2V 25
t
COMP-DLY
Delay from COMP to OUT Transition ns
CS stepped from 0V to 0.4V
D
MIN
Minimum Duty Cycle V
COMP
= 0V 0 %
D
MAX
Maximum Duty Cycle 90 95 %
A
PWM
COMP to PWM Comparator Gain 0.33 V/V
V
COMP-OC
COMP Pin Open Circuit Voltage V
FB
= 0V 4.3 5.2 6.1 V
I
COMP-SC
COMP Pin Short Circuit Current V
COMP
= 0V, V
FB
= 1.5V 0.6 1.1 1.5 mA
SLOPE COMPENSATION
V
SLOPE
Slope Compensation Amplitude 80 105 130 mV
MOSFET DRIVER
V
SAT-HI
Output High Saturation Voltage (VCC – I
OUT
= 50 mA 0.25 0.75 V
VOUT)
V
SAT-LO
Output Low Saturation Voltage (VOUT) I
OUT
= 100 mA 0.25 0.75 V
t
RISE
OUT Pin Rise Time OUT Pin load = 1 nF 18 ns
t
FALL
OUT Pin Fall Time OUT Pin load = 1 nF 15 ns
THERMAL CHARACTERISTICS
T
SD
Thermal Shutdown Threshold 165 °C
T
SD-HYS
Thermal Shutdown Hysteresis 25 °C
θ
JA
Junction to Ambient Thermal Resistance DGS0010A Package 200 °C/W
(4) Specification applies to the oscillator frequency.
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