2

LT1934/LT1934-1

1934f

(Note 1)

BOOST Pin Voltage ................................................. 40V

BOOST Pin Above SW Pin ...................................... 20V

SHDN Pin ............................................................... 34V

FB Voltage ................................................................ 6V

Operating Temperature Range (Note 2) ..........................

LT1934E/LT1934E-1 ......................... – 40

°C to 85°C

LT1934I/LT1934I-1 ......................... – 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

ORDER PART

NUMBER

S6 PART MARKING

LT1934ES6

LT1934ES6-1

LT1934IS6

LT1934IS6-1

LTXP

LTF8

LTAJB

LTAJC

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

BOOST 1

GND 2

FB 3

6 SW

4 SHDN

TOP VIEW

S6 PACKAGE

6-LEAD PLASTIC SOT-23

Consult LTC Marketing for parts specified with wider operating temperature ranges.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Undervoltage Lockout

3

3.2

V

–40

q

3

3.6

V

–40

q

3

3.6

V

Quiescent Current

12

22

µA

–40

q

12

26

µA

–40

q

12

26

µA

0.01

2

µA

FB Comparator Trip Voltage

–40

q

1.22

1.25

1.27

V

–40

q

1.21

1.25

1.27

V

FB Comparator Hysteresis

10

mV

FB Pin Bias Current

–40

q

2

±15

nA

–40

q

2

±60

nA

FB Voltage Line Regulation

0.007

%/V

Switch Off Time

1.4

1.8

2.3

µs

12

µs

Maximum Duty Cycle

–40

q

85

88

%

–40

q

83

88

%

200

300

mV

65

120

mV

Switch Current Limit

LT1934

350

400

490

mA

LT1934-1

90

120

160

mA

BOOST Pin Current

8.5

12

mA

6.0

10

mA

Minimum Boost Voltage (Note 3)

1.8

2.5

V

1.7

2.5

V

Switch Leakage Current

2

µA

ELECTRICAL CHARACTERISTICS