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LTC1623CMS8#PBF

P1-P3P4-P6P7-P9P10-P12
1
LTC1623
SMBus Dual High Side
Switch Controller
■
SMBus and I
2
C Compatible
■
Built-In Charge Pumps Drive N-Channel Switches
■
16 Available Switches on the Same Bus
■
0.6V V
IL
and 1.4V V
IH
for DATA and CLK
■
Available in 8-Lead MSOP and S0 Packages
■
Low Standby Current: 14µA
■
Eight Addresses from Two Three-State Address Pins
■
Internal Power-On Reset Timer
■
Internal Undervoltage Lockout
■
No Need for External Pull-Up Resistors at Output
■
No Need for Secondary Power Source
■
Computer Peripheral Control
■
Laptop Computer Power Plane Switching
■
Portable Equipment Power Control
■
Industrial Control Systems
■
Handheld Equipment
The LTC
®
1623 SMBus switch controller is a slave device
that controls two high-side N-channel MOSFETs on either
the SMBus or the I
2
C bus. The LTC1623 operates with an
input voltage from 2.7V to 5.5V with a low standby current
of 14µA (at 3.3V). In accordance with the SMBus specifi-
cation, the LTC1623 maintains the 0.6V V
IL
and 1.4V V
IH
input thresholds throughout the supply voltage range.
Using the 2-wire interface, CLK and DATA, the LTC1623
monitors the bus for a start condition (DATA going from
high to low while CLK is high). Once detected, the LTC1623
compares its address with the first (address) byte sent
over the bus from the master. If matched, the LTC1623 will
execute the second (command) byte from the master and
independently control the built-in charge pumps to drive
two external switches.
The LTC1623 has two three-state programmable address
pins, thus allowing eight different addresses and a total of
sixteen available switches on the same bus.
Gate Drive Voltage
V
CC
2.7V TO 5.5V
10µF
(PROGRAMMABLE)
* SILICONIX Si69260Q
Q2
Q1
LOAD2
LOAD1
1623 TA01
(FROM
SMBus)
LTC1623
GND
V
CC
AD0
AD1
CLK
DATA
GA
GB
*
SUPPLY VOLTAGE (V)
GATE VOLTAGE (V)
14
12
10
8
6
4
2
0
1623 G01
0
1
23456
T
J
= 25°C
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIONS
U
FEATURES
DESCRIPTION
U
TYPICAL APPLICATION
U
2
LTC1623
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Operating Supply Voltage Range 2.7 5.5 V
I
VCC
Supply Current Charge Pump Off, AD0 and AD1High or Low, V
CC
= 2.7V ● 12 30 µA
DATA and CLK High V
CC
= 3.3V ● 14 30 µA
V
CC
= 5V ● 17 30 µA
I
VCC
Supply Current GA or GB High (Command Byte 00000001 or 00000010) ● 140 250 µA
Both GA and GB High (Command Byte 00000011)
● 162 250 µA
V
GS
Gate Voltage Above Supply V
CC
= 2.7V ● 2.7 4.2 7 V
V
CC
= 3.3V ● 4.5 5.4 7 V
V
CC
= 5.5V ● 4.5 6.4 7 V
V
UVLO
Undervoltage Lockout Falling Edge (Note1) ● 1.5 2.0 2.5 V
t
POR
Power-On Reset Delay Time V
CC
= 2.7V (Note2) 300 1000 µs
V
CC
= 5.5V 300 1000 µs
f
OSC
Charge Pump Oscillator Frequency 300 kHz
(Note 3)
t
ON
Turn-On Time into 1000pF V
CC
= 2.7V (From ON to GA, GB = V
CC
+ 1V) (Note 4) 170 µs
V
CC
= 5.5V (From ON to GA, GB = V
CC
+ 2V) (Note 4) 180 µs
t
OFF
Turn-Off Time into 1000pF V
CC
= 2.7V (From OFF to GA, GB = 100mV) (Note 5) 17 µs
V
CC
= 5.5V (From OFF to GA, GB = 100mV) (Note 5) 12 µs
V
IL
DATA/CLK Input Low Voltage V
CC
= 2.7V to 5.5V 0.6 V
V
IH
DATA/CLK Input High Voltage V
CC
= 2.7V to 5.5V 1.4 V
ABSOLUTE MAXIMUM RATINGS
W
WW
U
(Voltages Referred to GND Pin)
Input Supply Voltage (V
CC
)..........................–0.3V to 6V
DATA, CLK (Bus Pins 1, 2) ..........................–0.3V to 6V
AD0, AD1 (Address Pins 3, 5) ..... –0.3V to (V
CC
+ 0.3V)
GA,GB (Gate Drive Pins 6, 7).......... –0.3V to (V
CC
+ 7V)
Junction Temperature...........................................125°C
Operating Temperature Range
LTC1623C.................................................. 0° to 70°C
LTC1623I............................................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
PACKAGE/ORDER INFORMATION
W
U
U
ORDER PART
NUMBER
ORDER PART
NUMBER
LTC1623CMS8
S8 PART MARKING
1623
1623I
LTC1623CS8
LTC1623IS8
MS8 PART MARKING
LTCH
Consult factory for Military grade parts.
1
2
3
4
DATA
CLK
AD0
GND
8
7
6
5
V
CC
GA
GB
AD1
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C, θ
JA
= 150°C/W
TOP VIEW
V
CC
GA
GB
AD1
DATA
CLK
AD0
GND
S8 PACKAGE
8-LEAD PLASTIC SO
1
2
3
4
8
7
6
5
T
JMAX
= 125°C, θ
JA
= 110°C/W
ELECTRICAL CHARACTERISTICS
T
A
= 25°C, V
CC
= 5V unless otherwise specified. C
GA
= 1000pF, C
GB
= 1000pF
3
LTC1623
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
T
A
= 25°C, V
CC
= 5V unless otherwise specified. C
GA
= 1000pF, C
GB
= 1000pF
PIN FUNCTIONS
UUU
DATA: (Pin 1) Open-Drain Connected Serial Data Inter-
face. Must be pulled high to V
CC
with external resistor. The
pull-up current must be limited to 350µA.
CLK: (Pin 2) Serial Clock Interface. Must be pulled high to
V
CC
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 V
CC
, GND, or V
CC
/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 V
CC
, GND, or V
CC
/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.
V
CC
: (Pin 8) Input Supply Voltage. Range from 2.7V to
5.5V.
V
IL
AD0 and AD1 Input Low Voltage V
CC
= 2.7V to 5.5V ● 0.2 V
V
IH
AD0 and AD1 Input High Voltage V
CC
= 2.7V to 5.5V ● V
CC
– 0.2 V
V
OL
Data Output Low Voltage V
CC
= 2.7 to 5.5V, I
PULLUP
= 350µA ● 0.22 0.4 V
C
IN
Input Capacitance 5pF
(DATA, CLK, AD0, AD1)
I
IN
Input Leakage Current (DATA, CLK) ±1 µA
Input Leakage Current(AD0, AD1) ±250 nA
SMBus Related Specs (Note 6)
f
SMB
SMBus Operating Frequency 10 100 kHz
t
SUSTA
Start Condition Setup Time 4.7 µs
t
BUF
Bus Free Time Between Stop and Start 4.7 µs
t
HDSTA
Start Condition Hold Time 4.0 µs
t
SUSTP
Stop Condition Setup Time 4.0 µs
t
HDDAT
Data Hold Time 300 ns
t
SUDAT
Data Setup Time 250 ns
t
LOW
Clock Low Period 4.7 µs
t
HIGH
Clock High Period 4.0 50 µs
t
f
Clock /Data Fall Time 300 ns
t
r
Clock/Data Rise Time 1000 ns
I
PULLUP
Current Through External Pull-Up (Data Pull-Down Current Capacity) 100 350 µA
Resistor on DATA Pin V
CC
= 2.7V to 5.5V
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.
The
● 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 V
CC
glitches.
Note 2: Measured from V
CC
> V
UVLO
to SMBus ready for data input.
Note 3: The oscillator frequency is not tested directly but is inferred from
turn-on time.
P1-P3P4-P6P7-P9P10-P12

LTC1623CMS8#PBF

Mfr. #:
Buy LTC1623CMS8#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Gate Drivers SMBus 2x Hi-SideSwitch Cntr
Lifecycle:
New from this manufacturer.
Delivery:
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