Datasheet

LM5030
www.ti.com SNVS215C –APRIL 2003–REVISED MARCH 2013
Electrical Characteristics (continued)
Specifications in standard type face are for T
J
= +25°C and those in boldface type apply over the full operating junction
temperature range. Unless otherwise specified: V
IN
= 48V, V
CC
= 10V, and RT = 26.7KΩ
Symbol Parameter Conditions Min
(1)
Typ
(2)
Max
(1)
Units
Error Amplifier
GBW Gain Bandwidth 4 MHz
DC Gain 75 dB
Input Voltage V
FB
= COMP 1.220 1.245 1.270 V
COMP Sink Capability V
FB
= 1.5V COMP= 1V 5 13 mA
Current Limit
CS1 Cycle by Cycle CS Threshold 0.45 0.5 0.55 V
Voltage
CS2 Restart CS Threshold Voltage Resets SS capacitor; auto 0.575 0.625 0.675 V
restart
ILIM Delay to Output CS step from 0 to 0.6V 30 ns
Time to onset of OUT
Transition (90%)
Cload = 0
CS Sink Current (clocked) CS = 0.3V 3 6 mA
Soft Start/Shutdown
Softstart Current Source 7 10 13 µA
Softstart to COMP Offset 0.25 0.5 0.75 V
Shutdown Threshold 0.2 0.45 0.7 V
Oscillator
Frequency1 (RT = 26.7K) 175 200 225 kHz
Frequency2 (RT = 8.2K) 510 600 690 kHz
Sync threshold 3.2 3.8 V
PWM Comparator
Delay to Output COMP set to 2V CS 30 ns
stepped 0 to 0.4V, Time to
onset of OUT transition low
Max Duty Cycle Inferred from deadtime 47.5 49 50 %
Min Duty Cycle COMP=0V 0 %
COMP to PWM Comparator Gain 0.34
COMP Open Circuit Voltage V
FB
= 0V 4.3 5.2 6.1 V
COMP Short Circuit Current V
FB
= 0V, COMP=0V 0.6 1.1 1.5 mA
Slope Compensation
Slope Comp Amplitude Delta increase at PWM 80 105 130 mV
Comparator to CS
Output Section
Deadtime Cload = 0, 10% to 10% 85 135 185 ns
Output High Saturation Iout = 50mA, V
CC
- V
OUT
0.25 0.75 V
Output Low Saturation I
OUT
= 100mA 0.25 0.75 V
Rise Time Cload = 1nF 16 ns
Fall Time Cload = 1nF 16 ns
Thermal Shutdown
Tsd Thermal Shutdown Temp. 165 °C
Thermal Shutdown Hysteresis 15 °C
Copyright © 2003–2013, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Links: LM5030