LT3433 LINER [Linear Technology], LT3433 Datasheet - Page 3

• Manufacturer Part Number: LT3433
• Description: High Voltage Step-Up/Step-Down DC/DC Converter
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
SYMBOL
I
g
A
I
f
t
t
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Supply current specification does not include switch drive
currents. Actual supply currents will be higher.
Note 3: “Normal Operation” supply current specification does not include
I
current.
Note 4: Minimum times are tested using the high side switch with a 35
load to ground.
TYPICAL PERFOR A CE CHARACTERISTICS
The
V
FB
SW
O
ON(MIN)
OFF(MIN)
BIAS
m
V
V
IN
500
100
FB
400
300
200
/V
= 13.8V, V
0
currents. Powering the V
VC
0
Maximum Output Current
vs V
denotes specifications that apply over the full operating temperature range, otherwise specifications are at T
BRIDGED
IN
10
PARAMETER
Feedback Reference Line Regulation
V
Error Amplifier Transconductance
Error Amplifier Voltage Gain
Control Voltage to Switch Transconductance
Operating Frequency
Foldback Frequency
Minimum Switch On Time
Minimum Switch Off Time
FB
BUCK
FB
20
= 1.25V, V
Pin Input Bias Current
SEE TYPICAL APPLICATION
ON THE FIRST PAGE OF
THIS DATA SHEET
V
IN
30
(V)
BIAS
OUT
40
pin externally reduces I
= 5V, V
W
V
OUT
50
= 5V
3433 G11
U
BURST_EN
60
= 0V, V
2.4
2.8
2.6
2.2
CC
–50
supply
V
vs Temperature
BIAS
BST
CONDITIONS
5.5V V
V
V
R
R
FB
FB
L
L
= 35 (Note 4)
= 35 (Note 4)
Output Voltage
– V
> 1V
= 0V
IN
0
TEMPERATURE ( C)
IN
= 5V, unless otherwise noted.
60V
Note 5: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125 C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 6: The LT3433E is guaranteed to meet performance specifications
from 0 C to 125 C junction temperature. Specifications over the – 40 C to
125 C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3433I is guaranteed over the full –40 C to 125 C operating junction
temperature range.
50
100
3433 G01
125
620
590
560
530
500
0
V
vs V
IN
T
A
MIN
200
185
170
= 25 C
Supply Current
IN
Supply Voltage
15
0.002
0.55
TYP
270
200
250
500
35
66
50
V
IN
A
30
(V)
= 25 C.
LT3433
MAX
0.01
100
330
215
230
450
800
45
umhos
UNITS
3433 G02
3433ia
3
%/V
kHz
kHz
kHz
A/V
nA
dB
ns
ns
60