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LT1932

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Input Voltage

Quiescent Current

VRSET = 0.2V

1.2

1.6

VSHDN = 0V

0.1

1.0

µA

RSET Pin Voltage

RSET = 1.50k

100

LED Pin Voltage

RSET = 1.50k, VIN < VOUT (Figure 1)

120

180

LED Pin Current

RSET = 562Ω, VIN = 1.5V

RSET = 750Ω, VIN = 1.2V

RSET = 1.50k, VIN = 1.2V

12.5

17.5

RSET = 4.53k, VIN = 1.2V

LED Pin Current Temperature Coefficient

ILED = 15mA

– 0.02

mA/

°C

Switching Frequency

VIN = 1V

0.8

1.2

1.6

MHz

Maximum Switch Duty Cycle

Switch Current Limit

400

550

780

Switch VCESAT

ISW = 300mA

150

200

SHDN Pin Current

VSHDN = 0V

0.1

µA

VSHDN = 2V

µA

Start-Up Threshold (SHDN Pin)

0.85

Shutdown Threshold (SHDN Pin)

0.25

Switch Leakage Current

Switch Off, VSW = 5V

0.01

µA

(Note 1)

VIN Voltage ............................................................. 10V

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

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

LED Voltage ............................................................. 36V

RSET Voltage ............................................................. 1V

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

°C

Operating Temperature Range (Note 2) .. – 40

°C to 85°C

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

°C to 150°C

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

°C

ORDER PART

NUMBER

LT1932ES6

TJMAX = 125°C, θJA = 250°C/ W

The q denotes specifications that apply over the full operating temperature

range, otherwise specifications are at TA = 25°C. VIN = 1.2V, VSHDN = 1.2V, unless otherwise noted.

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

S6 PART MARKING

LTST

SW 1

GND 2

LED 3

6 VIN

5 SHDN

4 RSET

TOP VIEW

S6 PACKAGE

6-LEAD PLASTIC SOT-23

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

a device may be impaired.

Note 2: The LT1932E 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.

Consult LTC Marketing for parts specified with wider operating temperature

ranges.

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