LTC4350IGN datasheet(2/16 Pages) LINER

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LTC4350

4350fa

ORDER PART

NUMBER

(Note 1)

Supply Voltage (VCC) ............................................... 17V

Input Voltage

TIMER .................................................. – 0.3V to 1.2V

R+, R– (Note 2) ......................................– 0.3V to 17V

FB ........................................................ – 0.3V to 5.3V

OV, UV .......................................................– 0.3V to 17V

Output Voltage

COMP1 ................................................... – 0.3V to 6V

COMP2 ................................................... – 0.3V to 3V

GAIN, SB ............................................. – 0.3V to 5.6V

GATE (Note 3) ...........................................– 0.3V to 20V

IOUT, STATUS ........................................... – 0.3V to 17V

RSET....................................................................... – 0.3V to 1V

Operating Temperature Range

LTC4350C ............................................... 0°C to 70°C

LTC4350I ........................................... – 40°C to 85°C

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

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

LTC4350CGN

LTC4350IGN

TJMAX = 150°C, θJA = 135°C/W

ABSOLUTE MAXIMUM RATINGS

PACKAGE/ORDER INFORMATION

The

● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted.

ELECTRICAL CHARACTERISTICS

GN PACKAGE

16-LEAD PLASTIC SSOP

TOP VIEW

TIMER

GAIN

COMP2

COMP1

GND

VCC

STATUS

GATE

R+

R–

IOUT

RSET

GN PART MARKING

4350

4350I

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

Note 1: A

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

DC Characteristics

ICC

VCC Supply Current

UV = VCC

●

1.0

1.6

2.0

VLKOH

VCC Undervoltage Lockout High

●

2.36

2.45

2.52

VLKOL

VCC Undervoltage Lockout Low

●

2.24

2.34

2.44

VFB

FB Pin Voltage

0°C to 85°C (LTC4350I) or 0°C to 70°C (LTC4350C)

1.208

1.220

1.236

–40°C to 85°C (LTC4350I)

1.196

1.220

1.244

VFBLIR

FB Line Regulation

VCC = 3.3V to 12V, COMP1 = 1.240V

0.02

0.05

%/V

VFBLOR

FB Load Regulation

COMP1 = 2V

●

– 0.0008 – 0.1

COMP1 = 0.64V

●

0.003

0.1

VUVTH

UV Pin Threshold

High Going Threshold

●

1.215

1.244

1.258

Low Going Threshold

●

1.205

1.220

1.237

VOVTH

OV Pin Threshold

High Going Threshold

●

1.203

1.220

1.250

Low Going Threshold

●

1.180

1.205

1.229

VTM

TIMER Pin Threshold

●

1.18

1.22

1.26

ITM

TIMER Pin Current

TIMER On, VTIMER = 0V

●

– 1.75

– 2

– 2.3

µA

TIMER On, VTIMER = 0V, VOV > VOVTH

●

– 5.30

– 6

– 6.7

µA

GAIN Pin Voltage

RGAIN = 25k, (VR

+ – VR–) = 100mV

●

2.3

2.5

2.7

VGO

GAIN Pin Offset

RGAIN = 25k, (VR+ – VR–) = 0mV

●

0.02

0.20

VSB(MIN)

SB Pin Minimum Voltage

VSB(MAX)

SB Pin Maximum Voltage

VCC = 3.3V

●

2.4

2.7

2.9

VCC = 12V

●

5.6

7.8

10.5

ISB(MAX)

SB Pin Maximum Current

VSB = 0V

●

–8

–33

– 41

RSB

SB Pin Resistor Value

●

kΩ

VE/A2OFF

E/A2 Offset

VSB – VGAIN

●

825

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