LT1935 参数 Datasheet PDF下载

LT1935

ABSOLUTE

(Note 1)

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

TOP VIEW

SW 1

GND 2

FB 3

4 SHDN

5 V

IN

V

IN

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

SW Voltage ................................................– 0.4V to 40V

FB Voltage ................................................................. 6V

Current Into FB Pin ..............................................

±1mA

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

Maximum Junction Temperature ......................... 125°C

Operating Ambient Temperature Range

(Note 2) .............................................. – 40°C to 85°C

Storage Temperature Range ................. – 65°C to 150°C

Strict adherence to JDEC 020B solder attach and rework

for assemblies containing lead is recommended.

ORDER PART

NUMBER

LT1935ES5

S5 PACKAGE

5-LEAD PLASTIC TSOT-23

S5 PART MARKING

LTRX

T

JMAX

= 125°C,

θ

JA

= 113°C/ W,

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

ELECTRICAL CHARACTERISTICS

The

●

denotes specifications which apply over the full operating temperature range, otherwise specifications are T

A

= 25°C.

V

IN

= 3V, V

SHDN

= V

IN

unless otherwise noted. (Note 2)

PARAMETER

Feedback Voltage

Feedback Voltage Line Regulation

FB Pin Bias Current

Undervoltage Lockout Threshold

Maximum Input Voltage

Switching Frequency

Maximum Duty Cycle

Switch Current Limit

Switch Saturating Voltage

Switch Leakage Current

SHDN Pin Input Current

Operating Supply Current

SHDN Supply Current

SHDN Input High Voltage

SHDN Input Low Voltage

Note 1:

Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2:

The LT1935ES5 is guaranteed to meet performance specifications

from 0°C to 70°C. Specifications over the – 40°C to 85°C operating

(Note 3)

I

SW

= 2A

V

SW

= 5V

V

SHDN

= 1.8V

V

SHDN

= 0V

V

FB

= 1.5V

V

SHDN

= 0V

1.8

0.5

3

0.1

1

●

●

CONDITIONS

Measured at the FB Pin

2.5V

≤

V

IN

≤

16V

V

FB

= V

REF

●

●

MIN

1.240

TYP

1.265

0.01

12

2.1

MAX

1.280

60

2.3

16

1.4

UNITS

V

%/V

nA

V

V

MHz

%

A

1

85

2

1.2

93

3.2

180

0.01

14

280

1

40

0.1

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 3:

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

2

U

mV

µA

µA

µA

mA

µA

V

V

1935f

W

U

U

W W

W