LT1934 LINER [Linear Technology], LT1934 Datasheet - Page 2

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

ABSOLUTE AXI U RATI GS
LT1934/LT1934-1
(Note 1)
Input Voltage (V
BOOST Pin Voltage ................................................. 40V
BOOST Pin Above SW Pin ...................................... 20V
SHDN Pin ............................................................... 34V
FB Voltage ................................................................ 6V
SW Voltage ............................................................... V
Operating Temperature Range (Note 2) ..........................
Maximum Junction Temperature .......................... 125 C
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
temperature range, otherwise specifications are at T
PARAMETER
Undervoltage Lockout
Quiescent Current
FB Comparator Trip Voltage
FB Comparator Hysteresis
FB Pin Bias Current
FB Voltage Line Regulation
Switch Off Time
Maximum Duty Cycle
Switch V
Switch Current Limit
BOOST Pin Current
Minimum Boost Voltage (Note 3)
Switch Leakage Current
2
ELECTRICAL CHARACTERISTICS
LT1934E/LT1934E-1 ......................... – 40 C to 85 C
LT1934I/LT1934I-1 ......................... – 40 C to 125 C
CESAT
IN
W
) ................................................. 34V
W W
CONDITIONS
V
V
I
I
LT1934-1
I
I
V
V
V
4V < V
V
V
LT1934
I
I
SW
SW
SW
SW
SW
SW
U
FB
SHDN
FB
FB
FB
FB
FB
A
= 1.3V
Falling
= 1.25V
> 1V
= 0V
= 1V
= 300mA (LT1934)
= 75mA (LT1934-1)
= 300mA (LT1934)
= 75mA (LT1934-1)
= 300mA (LT1934)
= 75mA (LT1934-1)
= 25 C. V
IN
= 0V
< 34V
The
IN
IN
–40 C T
–40 C T
–40 C T
–40 C T
–40 C T
–40 C T
–40 C T
–40 C T
–40 C T
–40 C T
denotes specifications which apply over the full operating
= 10V, V
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
T
JMAX
A
A
A
A
A
A
A
A
A
A
BOOST 1
BOOST
85 C
125 C
85 C
125 C
85 C
125 C
85 C
125 C
85 C
125 C
GND 2
= 125 C,
FB 3
6-LEAD PLASTIC SOT-23
= 15V, unless otherwise noted.
S6 PACKAGE
JA
TOP VIEW
= 250 C/ W,
JC
6 SW
5 V
4 SHDN
= 102 C/ W
IN
1.22
1.21
MIN
350
1.4
85
83
90
U
S6 PART MARKING
0.007
0.01
1.25
1.25
TYP
200
400
120
1.8
8.5
6.0
1.8
1.7
12
12
12
10
12
88
88
65
3
3
3
2
2
ORDER PART
LT1934ES6
LT1934ES6-1
LT1934IS6
LT1934IS6-1
NUMBER
W
LTXP
LTF8
LTAJB
LTAJC
MAX
1.27
1.27
300
120
490
160
3.2
3.6
3.6
2.3
2.5
2.5
22
26
26
12
10
2
15
2
60
UNITS
U
1934f
%/V
mV
mV
mV
mA
mA
mA
mA
nA
nA
%
%
V
V
V
A
A
A
A
V
V
V
V
A
s
s