LT3435(RevA) Просмотр технического описания (PDF) - Linear Technology

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LT3435
(Rev.:RevA)

High Voltage 3A, 500kHz Step-Down Switching Regulator with 100µA Quiescent Current

Linear Technology 

LT3435

ABSOLUTE AXI U RATI GS

(Note 1)

VIN, SHDN, BIAS, PGOOD, SW ............................... 60V

BOOST Pin Above SW ............................................ 35V

BOOST Pin Voltage ................................................. 68V

SYNC, CSS, PGFB, FB ................................................ 6V

Operating JunctionTemperature Range

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

NC 1

SW 2

VIN 3

VIN 4

SW 5

BOOST 6

CT 7

GND 8

16 PGOOD

15 SHDN

14 SYNC

13 PGFB

17

12 FB

11 VC

10 BIAS

9 CSS

FE PACKAGE

16-LEAD PLASTIC TSSOP

TJMAX = 125°C, θJA = 45°C/W, θJC(PAD) = 10°C/W

EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO GND (PIN 8)

ORDER PART NUMBER FE PART MARKING

LT3435EFE

LT3435IFE

3435EFE

3435IFE

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.

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

temperature range, otherwise specifications are at TJ = 25°C. VIN = 12V, SHDN = 12V, BIAS = 5V, FB/PGFB = 1.25V, CSS/SYNC = 0V

unless otherwise noted.

SYMBOL PARAMETER

CONDITIONS

MIN TYP MAX UNITS

VSHDN

ISHDN

IVINS

IVIN

SHDN Threshold

SHDN Input Current

Minimum Input Voltage (Note 3)

Supply Shutdown Current

Supply Sleep Current (Note 4)

Supply Quiescent Current

SHDN = 12V

SHDN = 0V, BOOST = 0V, FB/PGFB = 0V

BIAS = 0V, FB = 1.35V

FB = 1.35V

BIAS = 0V, FB = 1.15V

BIAS = 5V, FB = 1.15V

1.15

1.3

1.45

V

●

5

20

µA

●

2.4

3

V

0.1

2

µA

●

170 250

µA

●

45

75

µA

3.3

7

mA

2.6

6

mA

IBIASS

IBIAS

VREF

IFB

Minimum BIAS Voltage (Note 5)

BIAS Sleep Current (Note 4)

BIAS Quiescent Current

Minimum Boost Voltage (Note 6)

Input Boost Current (Note 7)

Reference Voltage (VREF)

FB Input Bias Current

EA Voltage Gain (Note 8)

SYNC = 3.3V

ISW = 1.5A

ISW = 3A

3.3V < VVIN < 60V

●

2.7

3.1

V

●

125 180

µA

700 900

µA

1.8

V

65

85

mA

● 1.225 1.25 1.275

V

75

200

nA

900

V/V

EA Voltage gm

dI(VC)= ±10µA

400

650

900

µMho

3435fa

2

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