2

LT1611

ORDER PART

NUMBER

LT1611CS5

S5 PART MARKING

LTES

Consult factory for Industrial and Military grade parts.

SW 1

GND 2

TOP VIEW

S5 PACKAGE

5-LEAD PLASTIC SOT-23

NFB 3

4 SHDN

(Note 1)

SW Voltage ................................................– 0.4V to 36V

NFB Voltage ............................................................. – 3V

Current into NFB Pin .............................................

±1mA

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

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

°C

Operating Temperature Range

Commercial ............................................. 0

°C to 70°C

Extended Commercial (Note 2) ........... – 40

°C to 85°C

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

°C to 150°C

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

°C

ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

0.9

1.1

V

Maximum Operating Voltage

10

V

NFB Pin Bias Current

q

– 2.7

– 4.7

– 6.7

µA

Feedback Voltage

q

– 1.205

– 1.23

– 1.255

V

Quiescent Current

3

4.5

mA

Quiescent Current in Shutdown

0.01

0.5

µA

0.01

1.0

µA

Reference Line Regulation

1.5V

0.02

0.2

%/V

Switching Frequency

q

1.0

1.4

1.8

MHz

Maximum Duty Cycle

q

82

86

%

Switch Current Limit

(Note 3)

550

800

mA

300

350

mV

Switch Leakage Current

0.01

1

µA

SHDN Input Voltage High

1V

SHDN Input Voltage Low

0.3

V

SHDN Pin Bias Current

25

50

µA

0

0.1

µA

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

of a device may be impaired.

Note 2: C grade device specifications are guaranteed over the 0

°C to 70°C

temperature range. In addition, C grade device specifications are assured

over the – 40

°C to 85°C temperature range by design or correlation, but

are not production tested.

Note 3: Current limit guaranteed by design and/or correlation to static test.

Slope compensation reduces current limit at higher duty cycle.