LT1946EMS8 Ver la hoja de datos (PDF) - Linear Technology

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LT1946EMS8

1.2MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start

Linear Technology 

LT1946

ABSOLUTE AXI U RATI GS

(Note 1)

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

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

FB Voltage ............................................................. 2.5V

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

Current Into FB Pin .............................................. ±1mA

Maximum 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

UW U

PACKAGE/ORDER I FOR ATIO

TOP VIEW

VC 1

FB 2

SHDN 3

9

GND 4

8 SS

7 COMP

6 VIN

5 SW

MS8E PACKAGE

8-LEAD PLASTIC MSOP

EXPOSED PAD (PIN 9) IS GROUND

(MUST BE SOLDERED TO PCB)

TJMAX = 125°C, θJA = 40°C/W,

θJC = 10°C/W

ORDER PART

NUMBER

LT1946EMS8E

MS8 PART MARKING

LTBNW

VC 1

FB 2

SHDN 3

GND 4

TOP VIEW

8 SS

7 COMP

6 VIN

5 SW

MS8 PACKAGE

8-LEAD PLASTIC MSOP

TJMAX = 125°C, θJA = 125°C/W

(4-LAYER BOARD)

Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF

Lead Free Part Marking: http://www.linear.com/leadfree/

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

ORDER PART

NUMBER

LT1946EMS8

MS8 PART MARKING

LTUG

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

temperature range, otherwise specifications are at TA = 25°C. VIN = 3V, VSHDN = VIN unless otherwise specified. (Note 2)

SYMBOL

Minimum Operating Voltage

Maximum Operating Voltage

Feedback Voltage

FB Pin Bias Current

Error Amp Transconductance

Error Amp Voltage Gain

Quiescent Current

Quiescent Current in Shutdown

Reference Line Regulation

Switching Frequency

Switching Frequency in Foldback

Maximum Duty Cycle

Switch Current Limit

Switch VCESAT

Switch Leakage Current

Soft-Start Charging Current

CONDITIONS

VFB = 1.250V (Note 3)

∆I = 2µA

VSHDN = 2.5V, Not Switching

VSHDN = 0V, VIN = 3V

2.6V ≤ VIN ≤ 16V

VFB = 0V

(Note 4)

ISW = 1A

VSW = 5V

VSS = 0.5V

MIN

1.230

● 1.220

●

0.9

● 0.8

● 86

● 1.5

2.5

TYP

2.45

1.250

20

40

300

3.2

0

0.01

1.2

0.4

90

2.1

240

0.01

4

MAX

2.6

16

1.270

1.270

120

5

1

0.05

1.4

1.5

3.1

340

1

6

UNITS

V

V

V

V

nA

µmhos

V/V

mA

µA

%/V

MHz

MHz

MHz

%

A

mV

µA

µA

1946fb

2

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