LT1933 Linear Technology, LT1933 Datasheet - Page 2

• Manufacturer Part Number: LT1933
• Description: 600mA 500kHz Step-Down Switching Regulator in SOT-23
• Manufacturer: Linear Technology

ABSOLUTE AXI U RATI GS
LT1933
(Note 1)
Input Voltage (V
BOOST Pin Voltage .................................................. 43V
BOOST Pin Above SW Pin ....................................... 20V
SHDN Pin ..................................................– 0.4V to 36V
FB Voltage ...................................................– 0.4V to 6V
Operating Temperature Range (Note 2)
LT1933E ................................................. – 40°C to 85°C
LT1933I ................................................ – 40°C to 125°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
The
V
ELECTRICAL CHARACTERISTICS
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
Switch Leakage Current
Minimum Boost Voltage Above Switch
BOOST Pin Current
SHDN Input Voltage High
SHDN Input Voltage Low
SHDN Bias Current
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LT1933E is 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 correlation
2
IN
= 12V, V
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
CESAT
BOOST
= 17V, unless otherwise noted. (Note 2)
IN
W
) ....................................– 0.4V to 36V
W W
CONDITIONS
V
Not Switching
V
V
V
V
(Note 3)
I
I
I
V
V
SW
SW
SW
U
FB
SHDN
IN
FB
FB
SHDN
SHDN
= 5V to 36V
= Measured V
= 1.1V
= 0V
= 400mA
= 400mA
= 400mA
= 0V
= 2.3V (Note 5)
= 0V
REF
+ 10mV (Note 4)
PACKAGE/ORDER I FOR ATIO
Consult factory for parts specified with wider operating temperature ranges.
with statistical process controls. The LT1933I specifications are
guaranteed over the –40°C to 125°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 flows out of pin.
Note 5: Current flows into pin.
BOOST 1
GND 2
T
FB 3
JMAX
6-LEAD PLASTIC TSOT-23
= 125°C, θ
θ
S6 PACKAGE
JC
TOP VIEW
= 102°C/ W
JA
= 165°C/ W,
●
●
●
6 SW
5 V
4 SHDN
IN
1.225
MIN
0.75
400
2.3
88
U
www.DataSheet4U.com
S6 PART MARKING
1.245
3.35
0.01
0.01
1.05
0.01
TYP
500
370
1.6
1.9
40
55
94
18
34
ORDER PART
LT1933ES6
LT1933IS6
NUMBER
W
LTAGN
LTAGP
A
1.265
MAX
= 25°C.
120
600
500
3.6
2.5
2.3
0.3
0.1
25
50
2
2
UNITS
U
1933f
%/V
kHz
kHz
mA
mV
mA
nA
µA
µA
µA
µA
%
V
V
A
V
V
V