2

LT1933

1933f

(Note 1)

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

ORDER PART

NUMBER

S6 PART MARKING

LT1933ES6

LT1933IS6

LTAGN

LTAGP

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Undervoltage Lockout

3.35

3.6

V

Feedback Voltage

●

1.225

1.245

1.265

V

FB Pin Bias Current

●

40

120

nA

Quiescent Current

Not Switching

1.6

2.5

mA

Quiescent Current in Shutdown

0.01

2

µA

Reference Line Regulation

0.01

%/V

Switching Frequency

400

500

600

kHz

55

kHz

Maximum Duty Cycle

●

88

94

%

Switch Current Limit

(Note 3)

0.75

1.05

A

370

500

mV

Switch Leakage Current

2

µA

Minimum Boost Voltage Above Switch

1.9

2.3

V

BOOST Pin Current

18

25

mA

SHDN Input Voltage High

2.3

V

SHDN Input Voltage Low

0.3

V

SHDN Bias Current

34

50

µA

0.01

0.1

µA

The

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 TSOT-23

ELECTRICAL CHARACTERISTICS

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

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.

Consult factory for parts specified with wider operating temperature ranges.