lm5039mhx National Semiconductor Corporation, lm5039mhx Datasheet - Page 5

• Manufacturer Part Number: lm5039mhx
• Description: Half-bridge Pwm Controller With Average Current Limit
• Manufacturer: National Semiconductor Corporation

Startup Regulator (VCC pin)
Voltage Reference Regulator (REF pin)
Under-Voltage Lock Out and shutdown (UVLO pin)
Current Sense Input (CS Pin)
Average Current (ACL Pin)
Current Limit Restart (RES Pin)
VIN to GND
HS to GND
HB to GND
HB to HS
VCC to GND
CS, RT, DLY, SS, to GND
COMP Input Current
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
apply over full Operating Junction Temperature range. V
27.4kΩ, V
Symbol
I
V
V
V
VCC(LIM)
V
V
I
V
V
VCCUV
CS(th1)
CS(th2)
UVLO
I
I
UVLO
ACL
VIN
VCC
REF
RES
UVLO
Parameter
VCC voltage
VCC current limit
VCC Under-voltage threshold (VCC
increasing)
VCC decreasing
Startup regulator current
Supply current into VCC from
external source
REF Voltage
REF Voltage Regulation
REF Current Limit
Under-voltage threshold
Hysteresis current
Under-voltage Shutdown Threshold UVLO voltage falling
Under-voltage Standby Enable
Threshold
Current Limit Threshold for Peak
cycle-by-cycle limiting
Current Limit Threshold for Average
current limiting
CS delay to output (peak cycle-by-
cycle only)
Leading edge blanking time at CS
CS sink impedance (clocked)
Pull-down sink Impedance
Source Current
RES Threshold
Charge source current
Discharge sink current
= 3V unless otherwise stated. See
-0.3V to 105V
-1V to 105V
-0.3V to 118V
-0.3V to 18V
-0.3V to 16V
-0.3V to 5.5V
10mA
Specifications with standard typeface are for T
(Note
(Note
Conditions
I
V
VIN = VCC, ΔV
setpoint
VCC – PGND
VIN = 90V, UVLO = 0V
Outputs & COMP open, V
Outputs Switching
I
I
REF = 4.5V
UVLO pin sourcing
UVLO voltage rising
CS from zero to 1V. Time for HO and LO
to fall to 90% of VCC. Output load = 0 pF.
Internal FET on resistance
V
V
V
VCC
REF
REF
VCC
CS
RES
RES
1)
= 0mA
= 0 to 10mA
> 0.525
2) and
= 10mA
= 7V
= 1.5V
= 1V
VIN
= 48V, V
(Note
5
VCC
ACL Input Current
All other inputs to GND
ESD Rating
Storage Temperature Range
Junction Temperature
VIN Voltage
External Voltage Applied to VCC
Operating Junction Temperature
Operating Ratings
3).
Human Body Model
from the regulation
VCC
= 10V externally applied, R
VCC
(Note
= 10V,
4)
J
= 25°C, and those with boldface type
1.212
0.570
0.475
4.85
Min
7.3
0.2
5.5
7.3
2.4
57
15
19
16
8
(Note
RT
= 20.0 kΩ, R
1.25
Typ
7.6
0.1
6.2
0.3
0.4
0.6
0.5
9.3
2.5
65
35
25
20
23
65
50
36
28
22
12
1)
4
5
500 µA
-0.3V to 7V
2kV
-65°C to 150°C
150°C
-40°C to +125°C
1.288
0.630
0.525
Max
5.15
11.3
7.9
6.9
2.6
70
50
27
65
28
16
13V to 105V
6
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DLY
8V to 15V
=
Units
mA
mA
mV
mA
mA
µA
µA
µA
µA
ns
ns
Ω
Ω
V
V
V
V
V
V
V
V
V
V