LTC1623 Linear Technology, LTC1623 Datasheet - Page 3

• Manufacturer Part Number: LTC1623
• Description: SMBus Dual High Side Switch Controller
• Manufacturer: Linear Technology

PIN
DATA: (Pin 1) Open-Drain Connected Serial Data Inter-
face. Must be pulled high to V
pull-up current must be limited to 350 A.
CLK: (Pin 2) Serial Clock Interface. Must be pulled high to
V
limited to 350 A.
AD0: (Pin 3) Lower Three-State Programmable Address
Pin. Must be connected directly to V
(using two resistors 1M). Do not float this pin.
GND: (Pin 4) Ground.
SYMBOL PARAMETER
V
V
V
C
I
SMBus Related Specs (Note 6)
f
t
t
t
t
t
t
t
t
t
t
I
The
temperature range.
Note 1: Approximately 3% hysteresis is provided to ensure stable
operation and eliminate false triggering by minor V
Note 2: Measured from V
Note 3: The oscillator frequency is not tested directly but is inferred from
turn-on time.
ELECTRICAL CHARACTERISTICS
IN
SMB
SUSTA
BUF
HDSTA
SUSTP
HDDAT
SUDAT
LOW
HIGH
f
r
PULLUP
IL
IH
OL
IN
CC
U
with external resistor. The pull-up current must be
denotes the specifications which apply over the full operating
FUNCTIONS
AD0 and AD1 Input Low Voltage
AD0 and AD1 Input High Voltage
Data Output Low Voltage
Input Capacitance
(DATA, CLK, AD0, AD1)
Input Leakage Current (DATA, CLK)
Input Leakage Current(AD0, AD1)
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
U
CC
U
> V
UVLO
to SMBus ready for data input.
CC
with external resistor. The
CC
CC
, GND, or V
CONDITIONS
V
V
V
(Data Pull-Down Current Capacity)
V
glitches.
CC
CC
CC
CC
= 2.7V to 5.5V
= 2.7V to 5.5V
= 2.7 to 5.5V, I
= 2.7V to 5.5V
T
A
CC
= 25 C, V
/2
PULLUP
= 350 A
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.
AD1: (Pin 5) Higher Three-State Programmable Address
Pin. Must be connected directly to V
(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.
V
5.5V.
CC
CC
= 5V unless otherwise specified. C
: (Pin 8) Input Supply Voltage. Range from 2.7V to
V
CC
MIN
300
250
100
4.7
4.7
4.0
4.0
4.7
4.0
10
– 0.2
GA
= 1000pF, C
0.22
TYP
CC
5
LTC1623
, GND, or V
MAX
1000
100
300
350
0.2
0.4
250
50
1
GB
= 1000pF
UNITS
CC
3
kHz
nA
pF
ns
ns
ns
ns
/2
V
V
V
A
A
s
s
s
s
s
s