LT3460(2003) Ver la hoja de datos (PDF) - Linear Technology

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Fabricante

LT3460
(Rev.:2003)

1.3MHz Step-Up DC/DC Converter in SC70 and ThinSOT

Linear Technology 

LT3460

ABSOLUTE AXI U RATI GS (Note 1)

Input Voltage (VIN) .................................................. 16V

SW Voltage .............................................................. 38V

FB Voltage ................................................................. 5V

SHDN Voltage .......................................................... 16V

Operating Ambient

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

UW U

PACKAGE/ORDER I FOR ATIO

TOP VIEW

SW 1

GND 2

FB 3

5 VIN

4 SHDN

S5 PACKAGE

5-LEAD PLASTIC TSOT-23

TJMAX = 125°C, θJA = 256°C/W IN FREE AIR

θJA = 120°C ON BOARD OVER

GROUND PLANE

ORDER PART

NUMBER

LT3460ES5

S5 PART MARKING

LTB1

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

TOP VIEW

SW 1

GND 2

FB 3

6 VIN

5 GND

4 SHDN

SC6 PACKAGE

6-LEAD PLASTIC SC70

TJMAX = 125°C, θJA = 400°C/W IN FREE AIR

θJA = 270°C/W ON BOARD OVER GROUND

PLANE

ORDER PART

NUMBER

LT3460ESC6

SC6 PART MARKING

LAAF

ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C, VIN = 3V, VSHDN = 3V, unless otherwise noted.

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

Minimum Operating Voltage

2.5

V

Maximum Operating Voltage

16

V

Feedback Voltage

1.235 1.255 1.275

V

q 1.225

1.280

V

Feedback Line Regulation

FB Pin Bias Current

2.5V < VIN < 16V

0.015

%/V

q5

25

80

nA

Supply Current

SHDN = 0V

2.0

3.0

mA

0.1

0.5

µA

Switching Frequency

1.0

1.3

1.7

MHz

Maximum Duty Cycle

85

90

%

Switch Current Limit

300 420 600

mA

Switch VCESAT

Switch Leakage Current

SHDN Voltage High

ISW = 250mA

VSW = 5V

320

450

mV

0.01

1

µA

1.5

V

SHDN Voltage Low

0.4

V

SHDN Pin Bias Current

40

µA

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

of a device may be impaired.

Note 2: The LT3460E 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.

3460f

2

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