LM2717-ADJ_08 NSC [National Semiconductor], LM2717-ADJ_08 Datasheet - Page 5

• Manufacturer Part Number: LM2717-ADJ_08
• Description: Dual Step-Down DC/DC Converter
• Manufacturer: NSC [National Semiconductor]

I
V
%V
V
V
I
I
I
I
V
g
g
A
A
D
F
Q
CL1
CL2
B1
B2
m1
m2
SW
BG
FB1
FB2
IN
V1
V2
MAX
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
Specifications in standard type face are for T
Range (T
Symbol
V
SW1 Voltage
SW2 Voltage
FB1, FB2 Voltages
CB1, CB2 Voltages
V
V
SHDN1 Voltage
SHDN2 Voltage
SS1 Voltage
SS2 Voltage
FSLCT Voltage
BG
(Note 6)
(Note 6)
IN
C1
C2
/ΔV
Voltage
Voltage
IN
J
= −40°C to +125°C). V
Total Quiescent Current (both
switchers)
Bandgap Voltage
Bandgap Voltage Line
Regulation
Buck 1 Feedback Voltage
Buck 2 Feedback Voltage
Buck 1 Switch Current Limit
Buck 2 Switch Current Limit
Buck 1 FB Pin Bias Current
(Note 8)
Buck 2 FB Pin Bias Current
(Note 8)
Input Voltage Range
Buck 1 Error Amp
Transconductance
Buck 2 Error Amp
Transconductance
Buck 1 Error Amp Voltage
Gain
Buck 2 Error Amp Voltage
Gain
Maximum Duty Cycle
Switching Frequency
Parameter
IN
0.965V
= 5V, I
1.75V
L
−0.3V to V
≤
Not Switching
Switching, switch open
V
V
V
V
V
V
V
ΔI = 20µA
ΔI = 20µA
R
R
= 0A, and F
≤
J
SHDN
IN
IN
IN
IN
IN
IN
F
F
−0.3V to 7.5V
−0.3V to 7.5V
−0.3V to 2.1V
−0.3V to 2.1V
V
−0.3V to 22V
−0.3V to 22V
−0.3V to 22V
= 25°C and those with boldface type apply over the full Operating Temperature
V
AGND to 5V
= 46.4k
= 22.6k
C2
−0.3V to 7V
= 8V (Note 7)
= 12V, V
= 8V (Note 7)
= 12V, V
= 20V
= 20V
(Note 1)
C1
(V
≤
= 0V
≤
IN
1.565V
Conditions
=V
2.25V
IN
+7V
SW
SW
OUT
OUT
)
= 300kHz unless otherwise specified.
= 3.3V
= 5V
5
Operating Conditions
Maximum Junction Temperature
Power Dissipation(Note 2)
Lead Temperature
ESD Susceptibility (Note 3)
Operating Junction
Temperature Range
(Note 4)
Storage Temperature
Supply Voltage
SW1 Voltage
SW2 Voltage
Switching Frequency
Vapor Phase (60 sec.)
Infrared (15 sec.)
Human Body Model
(Note 4)
1.248
1.230
1.236
1.214
1.236
1.214
-0.01
Min
240
480
1.4
2.6
89
4
(Note 5)
1.267
1.258
1.258
1340
1360
1.65
3.05
Typ
134
136
300
600
2.7
2.2
3.2
70
65
93
6
9
(Note 4)
1.294
1.299
0.125
1.286
1.288
1.286
1.288
Max
0.01
400
400
360
720
2.0
3.5
12
27
20
300kHz to 600kHz
6
−40°C to +125°C
−65°C to +150°C
Internally Limited
www.national.com
4V to 20V
150°C
300°C
215°C
220°C
Units
µmho
µmho
%/V
kHz
kHz
V/V
V/V
mA
mA
µA
nA
nA
%
2kV
20V
20V
V
V
V
A
A
V