Electrical Characteristics - Linear Technology LT1933 Datasheet

ELECTRICAL CHARACTERISTICS

temperature range, otherwise specifi cations are at T
PARAMETER
Undervoltage Lockout
Feedback Voltage
FB Pin Bias Current
Quiescent Current
Quiescent Current in Shutdown
Reference Line Regulation
Switching Frequency
Maximum Duty Cycle
Switch Current Limit
Switch V
CESAT
Switch Leakage Current
Minimum Boost Voltage Above Switch
BOOST Pin Current
SHDN Input Voltage High
SHDN Input Voltage Low
SHDN Bias Current
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT1933E is guaranteed to meet performance specifi cations
from 0°C to 70°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LT1933I specifi cations are
l
The denotes the specifi cations which apply over the full operating
= 25°C. V = 12V, V
A IN
CONDITIONS
V = Measured V + 10mV (Note 4)
FB REF
Not Switching
V = 0V
SHDN
V = 5V to 36V
IN
V = 1.1V
FB
V = 0V
FB
(Note 3)
I = 400mA, S6 Package
SW
I = 400mA, DCB6 Package
SW
I = 400mA
SW
I = 400mA
SW
V = 2.3V (Note 5)
SHDN
V = 0V
SHDN
guaranteed over the –40°C to 125°C temperature range. The LT1933H
specifi cations are guaranteed over the –40°C to 150°C temperature range.
Note 3: Current limit guaranteed by design and/or correlation to static test.
Slope compensation reduces current limit at higher duty cycle.
Note 4: Current fl ows out of pin.
Note 5: Current fl ows into pin.
= 17V, unless otherwise noted. (Note 2)
BOOST
MIN
l
1.225
l
400
l
88
0.75
2.3
LT1933
TYP MAX UNITS
3.35 3.6 V
1.245 1.265 V
40 120 nA
1.6 2.5 mA
0.01 2 μA
0.01 %/V
500 600 kHz
55 kHz
94 %
1.05 A
370 500 mV
370 mV
2 μA
1.9 2.3 V
18 25 mA
V
0.3 V
34 50 μA
0.01 0.1 μA
1933fe
3