lt3579iufd-trpbf Linear Technology Corporation, lt3579iufd-trpbf Datasheet - Page 3

• Manufacturer Part Number: lt3579iufd-trpbf
• Description: Lt3579/lt3579-1 6a Boost/inverting Dc/dc Converter With Fault Protection Features
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
PARAMETER
Minimum Input Voltage
V
Positive Feedback Voltage
Negative Feedback Voltage
Positive FB Pin Bias Current
Negative FB Pin Bias Current
Error Amp Transconductance
Error Amp Voltage Gain
Quiescent Current
Quiescent Current in Shutdown
Reference Line Regulation
Switching Frequency, f
Switching Frequency in Foldback
Switching Frequency Range
SYNC High Level for Sync
SYNC Low Level for Sync
SYNC Clock Pulse Duty Cycle
Recommended Minimum SYNC Ratio
f
Minimum Off-Time
Minimum On-Time
SW1 Current Limit
SW Current Sharing, I
SW1 + SW2 Current Limit
Switch V
SW1 Leakage Current
SW2 Leakage Current
SYNC
IN
Overvoltage Lockout
/f
OSC
CESAT
SW2
OSC
/I
SW1
CONDITIONS
V
V
ΔI=10μA
Not Switching
V
2.5V ≤ V
R
R
Compared to Normal f
Free-Running or Synchronizing
V
At All Duty Cycles (Note 3)
SW1 and SW2 Tied Together
I
SW1 and SW2 Tied Together, I
V
V
SW2
FB
FB
SHDN
T
T
SYNC
SW1
SW2
= 34kΩ
= 432kΩ
=Positive Feedback Voltage, Current into Pin
=Negative Feedback Voltage, Current out of Pin
/I
SW1
= 5V
= 5V
= 0V to 2V
= 0V
IN
= 0.78, At All Duty Cycles (Note 3)
≤ 15V
A
= 25°C. V
The
OSC
l
IN
denotes the specifi cations which apply over the full operating
= 5V, V
SW1
+ I
SHDN
SW2
= 5.5A
= V
IN,
V
FAULT
= V
IN
l
l
l
l
l
l
l
l
l
l
l
l
unless otherwise noted. (Note 2).
LT3579/LT3579-1
1.195
16.2
80.5
MIN
175
200
2.2
1.3
3.4
81
20
3
6
1.215
18.7
83.3
83.3
0.01
0.78
0.01
0.01
TYP
250
200
250
2.3
1.9
2.5
1/6
3/4
4.2
7.5
70
45
55
9
0
1.230
2500
MAX
21.2
85.5
0.05
225
350
2.5
2.4
2.8
0.4
5.1
9.4
16
85
80
1
1
1
μmhos
UNITS
35791f
3
MHz
ratio
%/V
kHz
kHz
V/V
A/A
mV
mA
mV
μA
μA
μA
nS
nS
μA
μA
%
V
V
V
V
V
A
A