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LM2599 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LM2599
Description  SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator, with Features
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM2599-12
Electrical Characteristics
Specifications with standard type face are for T
J = 25˚C, and those with boldface type apply over full Operating Tempera-
ture Range.
Symbol
Parameter
Conditions
LM2599-12
Units
(Limits)
Typ
Limit
(Note 4)
(Note 5)
SYSTEM PARAMETERS (Note 6) Test Circuit
Figure 1
V
OUT
Output Voltage
15V
≤ V
IN ≤ 40V, 0.2A ≤ ILOAD ≤ 3A
12
V
11.52/11.40
V(min)
12.48/12.60
V(max)
η
Efficiency
V
IN = 25V, ILOAD = 3A
90
%
LM2599-ADJ
Electrical Characteristics
Specifications with standard type face are for T
J = 25˚C, and those with boldface type apply over full Operating Temperature
Range.
Symbol
Parameter
Conditions
LM2599-ADJ
Units
(Limits)
Typ
Limit
(Note 4)
(Note 5)
SYSTEM PARAMETERS (Note 6) Test Circuit
Figure 1
V
FB
Feedback Voltage
4.5V
≤ V
IN ≤ 40V, 0.2A ≤ ILOAD ≤ 3A
1.230
V
V
OUT programmed for 3V. Circuit of Figure 1.
1.193/1.180
V(min)
1.267/1.280
V(max)
η
Efficiency
V
IN = 12V, VOUT = 3V, ILOAD = 3A
73
%
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for T
J = 25˚C, and those with boldface type apply over full Operating Tempera-
ture Range. Unless otherwise specified, V
IN = 12V for the 3.3V, 5V, and Adjustable version and VIN = 24V for the 12V ver-
sion. I
LOAD = 500 mA
Symbol
Parameter
Conditions
LM2599-XX
Units
(Limits)
Typ
Limit
(Note
4)
(Note 5)
DEVICE PARAMETERS
I
b
Feedback Bias Current
Adjustable Version Only, V
FB = 1.3V
10
nA
50/100
nA (max)
f
O
Oscillator Frequency
(Note 7)
150
kHz
127/110
kHz(min)
173/173
kHz(max)
V
SAT
Saturation Voltage
I
OUT = 3A (Note 8) (Note 9)
1.16
V
1.4/1.5
V(max)
DC
Max Duty Cycle (ON)
(Note 9)
100
%
Min Duty Cycle (OFF)
(Note 10)
0
I
CL
Current Limit
Peak Current, (Note 8) (Note 9)
4.5
A
3.6/3.4
A(min)
6.9/7.5
A(max)
I
L
Output Leakage Current
(Note 8) (Note 10) (Note 11)
Output = 0V
50
µA(max)
Output = −1V
2
mA
30
mA(max)
I
Q
Operating Quiescent
SD /SS Pin Open (Note 10)
5mA
Current
10
mA(max)
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