LTC1646IGN datasheet(2/20 Pages) LINER

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LTC1646

1646fa

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IDD

V5VIN Supply Current

OFF/ON = 0V

●

1.5

VLKO

Undervoltage Lockout

5VIN

●

2.3

2.50

2.7

3VIN

●

2.3

2.55

2.7

VFB

Foldback Current Limit Voltage

VFB = (V5VIN –V5VSENSE), V5VOUT = 0V, TIMER = 0V

●

VFB = (V5VIN – V5VSENSE), V5VOUT = 4V, TIMER = 0V

●

VFB = (V3VIN – V3VSENSE), V3VOUT = 0V, TIMER = 0V

●

VFB = (V3VIN – V3VSENSE), V3VOUT = 2V, TIMER = 0V

●

VCB

Circuit Breaker Trip Voltage

VCB = (V5VIN – V5VSENSE), V5VOUT = 5V, TIMER Open

●

VCB = (V3VIN – V3VSENSE), V3VOUT = 3.3V, TIMER Open

●

tOC

Overcurrent Fault Response Time

(V5VIN – V5VSENSE) = 100mV, TIMER Open

●

µs

(V3VIN – V3VSENSE) = 100mV, TIMER Open

●

µs

tSS

Short-Circuit Fault Response Time

(V5VIN – V5VSENSE) = 200mV, TIMER Open

●

0.145

µs

(V3VIN – V3VSENSE) = 200mV, TIMER Open

●

0.145

µs

ICP

GATE Pin Output Current

OFF/ON = 0V, VGATE = 0V, TIMER = 0V

●

–18

–13

–8

µA

OFF/ON = 5V, VGATE = 5V, TIMER = 0V

200

300

µA

OFF/ON = 0V, VGATE = 5V, FAULT = 0V, TIMER Open

●

VGATE

External Gate Voltage

OFF/ON = 0V, IGATE = –1µA

●

(GATE to GND)

OFF/ON = 0V, V5VIN = 3.3V, IGATE = –1µA

●

VTH

Power Good Threshold Voltage

3VOUT

●

2.8

2.9

3.0

5VOUT

●

4.5

4.65

4.75

V3VONLY

No 5V Input Mode Window Voltage V3VONLY = ⎪V5VIN – V3VIN⎪, V5VOUT = V3VOUT = 3.3V

●

120

200

VIL

Input Low Voltage

OFF/ON, RESETIN, FAULT

●

0.8

ORDER PART NUMBER

TJMAX = 125°C, θJA = 135°C/W

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

LTC1646CGN

LTC1646IGN

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

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

temperature range, otherwise specifications are at TA = 25°C. V5VIN = 5V and V3VIN = 3.3V unless otherwise noted.

Supply Voltages: 5VIN, 3VIN............................................... 10V

Input Voltages: (Pins 15, 16) ..................... –0.3V to 10V

Output Voltages: (Pins 1, 3, 4) .................. –0.3V to 10V

Analog Voltages and Currents:

(Pin 9) .................................... –0.3V to (3VIN + 0.3V)

(Pins 2, 5, 7, 11, 13, 14) ........ –0.3V to (5VIN + 0.3V)

(Pin 10) ..........................................................

±20mA

Operating Temperature Range:

LTC1646C ............................................... 0

°C to 70°C

LTC1646I .............................................–40

°C to 85°C

Storage Temperature Range ..................–65

°C to 150°C

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

°C

TOP VIEW

GN PACKAGE

16-LEAD PLASTIC SSOP

RESETOUT

TIMER

FAULT

PWRGD

5VOUT

GND

3VOUT

3VIN

RESETIN

OFF/ON

DRIVE

PRECHARGE

5VIN

5VSENSE

GATE

3VSENSE

GN PART MARKING

1646

1646I

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/

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