2

LT1937

1937f

SW Voltage ............................................................. 36V

FB Voltage .............................................................. 10V

SHDN Voltage ......................................................... 10V

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

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

SW 1

GND 2

TOP VIEW

S5 PACKAGE

5-LEAD PLASTIC TSOT-23

FB 3

4 SHDN

ORDER PART

NUMBER

S5 PART MARKING

LT1937ES5

LTYN

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

2.5

V

Maximum Operating Voltage

10

V

Feedback Voltage

86

95

104

mV

FB Pin Bias Current

10

45

100

nA

Supply Current

1.9

2.5

mA

SHDN = 0V

0.1

1.0

µA

Switching Frequency

0.8

1.2

1.6

MHz

Maximum Duty Cycle

85

90

%

Switch Current Limit

320

mA

350

mV

Switch Leakage Current

0.01

5

µA

SHDN Voltage High

1.5

V

SHDN Voltage Low

0.4

V

SHDN Pin Bias Current

65

µA

ELECTRICAL CHARACTERISTICS

Note 1: Absolute Maximum Ratings are those values beyond which the life

of the device may be impaired.

Note 2: The LT1937E is guaranteed to meet 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.

Extended Commercial

Operating Temperature Range (Note 2) ... – 40

°C to 85°C

Maximum Junction Temperature .......................... 125

°C

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

(Note 1)

ORDER PART

NUMBER

SC6 PART MARKING

LT1937ESC6

LAAB

SW 1

GND 2

FB 3

5 GND

4 SHDN

TOP VIEW

SC6 PACKAGE

6-LEAD PLASTIC SC70