LTC1477CS8 datasheet(2/8 Pages) LINER

2 / 8 page

LTC1477/LTC1478

Supply Voltage .......................................................... 7V

Enable Input Voltage ...................... (7V) to (GND – 0.3V)

Output Voltage (OFF) (Note 1) ....... (7V) to (GND – 0.3V)

Output Short-Circuit Duration .......................... Indefinite

Junction Temperature ........................................... 110

°C

ABSOLUTE MAXIMUM RATINGS

Operating Temperature

LTC1477C/LTC1478C .............................. 0

°C to 70°C

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

°C to 150°C

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

°C

PACKAGE/ORDER INFORMATION

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN

Supply Voltage Range

2.7

5.5

IVIN

Supply Current

Switch OFF, Enable = 0V

0.01

µA

Switch ON, Enable = 5V, VIN = 5V

120

180

µA

Switch ON, Enable = 3.3V, VIN = 3.3V

120

µA

RON

ON Resistance

VINS = VIN1 = VIN2 = VIN3 = 5V, IOUT = 1A

0.07

0.12

Ω

VINS = VIN1 = VIN2 = VIN3 = 3.3V, IOUT = 1A

0.08

0.12

Ω

VINS = VIN1 = 5V, VIN2 = VIN3 = NC, IOUT = 0.5A

0.12

0.20

Ω

VINS = VIN1 = 3.3V, VIN2 = VIN3 = NC, IOUT = 0.5A

0.13

0.20

Ω

ILKG

Output Leakage Current OFF

Switch OFF, Enable = 0V

±20

µA

ISC

Short-Circuit Current Limit

VINS = VIN1 = VIN2 = VIN3 = 5V, VOUT = 0V, (Note 4)

1.60

2.00

2.40

VINS = VIN1 = 5V, VIN2 = VIN3 = NC, VOUT = 0V, (Note 4)

0.68

0.85

1.02

VENH

Enable Input High Voltage

3.0V

≤ VINS ≤ 5.5V

2.0

VENL

Enable Input Low Voltage

3.0V

≤ VINS ≤ 5.5V

0.8

IEN

Enable Input Current

≤ VEN ≤ 5.5V

±1

µA

tD+R

Delay and Rise Time

ROUT = 100Ω, COUT = 1µF, to 90% of Final Value

0.50

1.00

2.00

increase the ON resistance of the switch. The LTC1478 GND pins must be

connected together. (See Pin Functions and Block Diagram for more detail.)

Note 3: Other channel turned OFF, i.e. AEN and BEN = 0V.

Note 4: The output is protected with fold-back current limit which reduces

the short-circuit (0V) currents below peak permissible current levels at

higher output voltages. (See Typical Performance Characteristics for

further detail on output current versus output voltage).

The q denotes specifications which apply over the full operating

temperature range.

Note 1: The VOUT pins must be connected together.

Note 2: The VINS and VIN1 pins must be connected together. The VIN2 and

VIN3 pins are typically connected to VINS and VIN1 pins but can be

selectively disconnected to reduce the short-circuit current limit and

Consult factory for Industrial and Military grade parts.

TOP VIEW

S PACKAGE

16-LEAD PLASTIC SO

AVOUT

AVIN

AVINS

AEN

GND

BVIN3

BVIN2

BVOUT

AVOUT

AVIN2

AVIN3

GND

BEN

BVINS

BVIN1

BVOUT

TJMAX = 110°C, θJA = 100°C/ W

ELECTRICAL CHARACTERISTICS

VINS = VIN1 = VIN2 = VIN3 = 5V (Note 2), TA = 25°C, unless otherwise noted. Each channel of the LTC1478 is tested separately (Note 3).

TJMAX = 110°C, θJA = 120°C/ W

TOP VIEW

VOUT

VIN2

VIN3

GND

VOUT

VIN1

VINS

S8 PACKAGE

8-LEAD PLASTIC SO

1477

S8 PART MARKING

LTC1477CS8

ORDER PART

NUMBER

LTC1478CS

ORDER PART

NUMBER

LTC1477CS8 数据表(PDF) 2 Page - Linear Technology

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