LTC1623CMS8 查看數據表（PDF） - Linear Technology

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LTC1623CMS8

SMBus Dual High Side Switch Controller

Linear Technology 

LTC1623

ELECTRICAL CHARACTERISTICS TA = 25°C, VCC = 5V unless otherwise specified. CGA = 1000pF, CGB = 1000pF

SYMBOL PARAMETER

CONDITIONS

MIN TYP MAX UNITS

VIL

AD0 and AD1 Input Low Voltage

VIH

AD0 and AD1 Input High Voltage

VOL

Data Output Low Voltage

CIN

Input Capacitance

(DATA, CLK, AD0, AD1)

VCC = 2.7V to 5.5V

VCC = 2.7V to 5.5V

VCC = 2.7 to 5.5V, IPULLUP = 350µA

q

0.2

V

q VCC – 0.2

V

q

0.22 0.4

V

5

pF

IIN

Input Leakage Current (DATA, CLK)

Input Leakage Current(AD0, AD1)

SMBus Related Specs (Note 6)

±1

µA

±250

nA

fSMB

tSUSTA

tBUF

tHDSTA

tSUSTP

tHDDAT

tSUDAT

tLOW

tHIGH

tf

tr

IPULLUP

SMBus Operating Frequency

Start Condition Setup Time

Bus Free Time Between Stop and Start

Start Condition Hold Time

Stop Condition Setup Time

Data Hold Time

Data Setup Time

Clock Low Period

Clock High Period

Clock /Data Fall Time

Clock/Data Rise Time

Current Through External Pull-Up

Resistor on DATA Pin

(Data Pull-Down Current Capacity)

VCC = 2.7V to 5.5V

10

100

kHz

4.7

µs

4.7

µs

4.0

µs

4.0

µs

300

ns

250

ns

4.7

µs

4.0

50

µs

300

ns

1000

ns

100

350

µA

The q denotes the specifications which apply over the full operating

temperature range.

Note 1: Approximately 3% hysteresis is provided to ensure stable

operation and eliminate false triggering by minor VCC glitches.

Note 2: Measured from VCC > VUVLO to SMBus ready for data input.

Note 3: The oscillator frequency is not tested directly but is inferred from

turn-on time.

Note 4: ON is enabled upon receiving the Stop condition from the SMBus

master.

Note 5: OFF is enabled upon receiving the Stop condition from the SMBus

master.

Note 6: SMBus timing specs are guaranteed but not tested.

PIN FUNCTIONS

DATA: (Pin 1) Open-Drain Connected Serial Data Inter-

face. Must be pulled high to VCC with external resistor. The

pull-up current must be limited to 350µA.

CLK: (Pin 2) Serial Clock Interface. Must be pulled high to

VCC with external resistor. The pull-up current must be

limited to 350µA.

AD0: (Pin 3) Lower Three-State Programmable Address

Pin. Must be connected directly to VCC, GND, or VCC/2

(using two resistors ≤ 1M). Do not float this pin.

GND: (Pin 4) Ground.

AD1: (Pin 5) Higher Three-State Programmable Address

Pin. Must be connected directly to VCC, GND, or VCC/2

(using two resistors ≤ 1M). Do not float this pin.

GB: (Pin 6) Gate Drive to External High-Side Switch. Fully

enhanced by internal charge pump. Controlled by 2nd

LSB of command byte.

GA: (Pin 7) Gate Drive to External High-Side Switch. Fully

enhanced by internal charge pump. Controlled by LSB of

command byte.

VCC: (Pin 8) Input Supply Voltage. Range from 2.7V to

5.5V.

3

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