lm5070sd-50 National Semiconductor Corporation, lm5070sd-50 Datasheet - Page 5

• Manufacturer Part Number: lm5070sd-50
• Description: Integrated Power Over Ethernet Pd Interface And Pwm Controller
• Manufacturer: National Semiconductor Corporation

V
Error Amplifier
GBW
Current Limit
Softstart
Oscillator(Note 5)
PWM Comparator
Slope Compensation
Output Section
Electrical Characteristics
Specifications in standard type face are for T
perature range. Unless otherwise specified: V
CC
Symbol
Supply
V
V
Supply Current (Icc)
Gain Bandwidth
DC Gain
Input Voltage
COMP Sink Capability
ILIM Delay to Output
Cycle by Cycle Current Limit
Threshold Voltage
Leading Edge Blanking Time
CS Sink Impedance (clocked)
Softstart Current Source
Frequency1
(RT = 30.3K)
Frequency2
(RT = 10.5K)
Sync threshold
Delay to Output
Min Duty Cycle
Max Duty Cycle (-80 Device)
Max Duty Cycle (-50 Device)
COMP to PWM Comparator
Gain
COMP Open Circuit Voltage
COMP Short Circuit Current
Slope Comp Amplitude
(LM5070-80 Device Only)
Output High Saturation
Output Low Saturation
Rise time
Fall time
CC
CC
UVLO (Rising)
UVLO (Falling)
Parameter
(Note 3) (Continued)
J
IN
= +25˚C and those in boldface type apply over the full operating junction tem-
Cload = 0
FB = COMP
FB=1.5V COMP=1V
CS step from 0 to 0.6V,
time to onset of OUT
transition (90%)
COMP set to 2V
CS stepped 0 to 0.4V,
time to onset of OUT
transition low
COMP=0V
COMP= 0V
Delta increase at PWM
Comparator to CS
I
V
I
Cload = 1nF
Cload = 1nF
out
out
= 48V, V
CC
= 50mA,
= 100mA
- V
Conditions
OUT
CC
= 10V, RT = 30.3kΩ.
5
VccReg –
300mV
1.219
1.212
0.44
Min
175
505
5.9
4.5
0.6
5
7
VccReg –
100mV
6.25
0.33
0.25
0.25
Typ
200
580
105
1.5
0.5
3.1
5.4
1.1
75
20
20
55
25
10
25
80
50
15
15
4
1.281
1.288
Max
0.56
0.75
0.75
225
665
6.6
3.8
6.3
1.5
55
13
3
0
www.national.com
Units
MHz
KHz
KHz
mA
mA
mA
mV
dB
uA
ns
ns
ns
ns
ns
%
%
%
Ω
V
V
V
V
V
V
V