LT1934 LINER [Linear Technology], LT1934 Datasheet - Page 3

• Manufacturer Part Number: LT1934
• Description: Micropower Step-Down Switching Regulators in ThinSOT
• Manufacturer: LINER [Linear Technology]

temperature range, otherwise specifications are at T
PARAMETER
SHDN Pin Current
SHDN Input Voltage High
SHDN Input Voltage Low
TYPICAL PERFOR A CE CHARACTERISTICS
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LT1934E and LT1934E-1 are guaranteed to meet performance
specifications from 0 C to 70 C. Specifications over the –40 C to 85 C
operating temperature range are assured by design, characterization and
100
100
90
80
70
60
50
90
80
70
60
50
0.1
0.1
LT1934-1 Efficiency, V
LT1934 Efficiency, V
LT1934
V
L = 47 H
T
LT1934-1
V
L = 100 H
T
OUT
A
A
OUT
= 25 C
= 25 C
= 5V
= 3.3V
1
LOAD CURRENT (mA)
LOAD CURRENT (mA)
1
V
IN
V
10
V
= 12V
IN
IN
= 24V
= 12V
OUT
10
OUT
V
IN
= 5V
W
= 24V
100
= 3.3V
1934 G04
1934 G01
U
100
300
100
500
400
200
100
CONDITIONS
V
V
90
80
70
60
50
SHDN
SHDN
0
0.1
–50 –25
A
LT1934 Efficiency, V
Current Limit vs Temperature
LT1934
V
L = 47 H
T
= 25 C. V
A
OUT
= 2.3V
= 34V
= 25 C
= 3.3V
The
1
LOAD CURRENT (mA)
0
TEMPERATURE ( C)
IN
LT1934-1
LT1934
denotes specifications which apply over the full operating
= 10V, V
V
25
IN
= 12V
correlation with statistical process controls. The LT1934I and LT1934I-1
specifications are guaranteed over the –40 C to 125 C temperature range.
Note 3: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
10
50
OUT
V
BOOST
IN
V
75
= 5V
IN
= 3.3V
= 24V
100
100
= 15V, unless otherwise noted.
1934 G05
1934 G02
125
100
3.0
2.5
2.0
1.5
1.0
0.5
90
80
70
60
50
0
–50
0.1
Off Time vs Temperature
LT1934-1 Efficiency, V
LT1934-1
V
L = 150 H
T
LT1934/LT1934-1
MIN
2.3
A
OUT
= 25 C
–25
= 5V
LOAD CURRENT (mA)
0
TEMPERATURE ( C)
TYP
0.5
1.5
1
25
50
MAX
0.25
V
V
5
IN
IN
10
OUT
= 12V
= 24V
75
= 5V
100
1934 G03
1934 G06
UNITS
3
1934f
100
125
A
A
V
V