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LTC1695CS5#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC1695
7
BLOCK DIAGRA
W
–
+
OP AMP
POWER ON
RESET
AND UVLO
SHUTDOWN
CONTROL
THERMAL
SHUTDOWN
BOOST START
TIMER
6-BIT DAC
(RESISTORS,
SWITCHES)
COMMAND
REGISTER
SMBus
INTERFACE
(BUFFERS,
LOGIC)
DATA
REGISTER
SCL
SDA
PULL-DOWN/UP
LOGIC
CURRENT
LIMIT
R1
50k
GND
V
OUT
V
CC
P1
0.75Ω
1695 • BD
R2
50k
6
LTC1695
8
SWITCHING WAVEFORMS
UW
Boost Start Timer Measurement
I
LOAD
= 10mA, C
LOAD
= 4.7µF
Output Switch On Time Measurement
Code = 63, I
LOAD
= 1mA, C
LOAD
= 4.7µF
f
SMBus
=100kHz
Output Switch Off Time Measurement
Code = 0, I
LOAD
= 150mA, C
LOAD
= 4.7µF
f
SMBus
=100kHz
V
OUT
= V
FS
t
BST_ST
90% V
FS
90% V
FS
V
OUT
= V
ZS
V
OUT
= V(CODE 32)
1695 • SW01
t
OFF
V
OUT
= V
FS
V
OUT
= V
ZS
10% V
FS
STOP
CONDITION
12 13 14 15 16 17 18 19
D5 D4 D3 D2 D1 D0
ACK
COMMAND BYTE
1695 • SW03
t
ON
V
OUT
= V
FS
90% V
FS
V
OUT
= V
ZS
STOP
CONDITION
12 13 14 15 16 17 18 19
D5 D4 D3 D2 D1 D0
ACK
COMMAND BYTE
1695 • SW02
LTC1695
9
TI I G DIAGRA
UWW
D5 D4 D3 D2 D1 D0
ACKBSTX
ACKWR0010111
1695 • TD01
PS
12 13 14 15 16 17 185678910111234 19
COMMAND BYTESLAVE ADDRESS
SCL
SDA
S = SMBus START BIT
P = SMBus STOP BIT
BST = 1 ENABLES THE BOOST START TIMER
D5 TO D0 = 6-BIT INPUT CODE FOR THE DAC (D5 = MSB)
X = DON'T CARE
SMBus SEND BYTE PROTOCOL, WITH SMBus ADDRESS = 1110100B
ACKTHEOCFACKWR0010000000111
PS
12 13 14 15 16 17 185678910111234 19
COMMAND BYTESLAVE ADDRESS
SCL
SDA
S = SMBus START BIT
P = SMBus STOP BIT
OCF = 1 SIGNALS THAT THE LTC1695 IS IN CURRENT LIMIT
THE = 1 SIGNALS THAT THE LTC1695 IS IN THERMAL SHUTDOWN
SMBus RECEIVE BYTE PROTOCOL, WITH SMBus ADDRESS = 1110100B
Operating Sequence
t
BUF
t
LOW
t
HIGH
t
r
t
f
t
HD(STA)
t
HD(STA)
t
HD(DAT)
t
SU(STA)
t
SU(STO)
t
SU(DAT)
STOP
STOP
START
START
SDA
SCL
1695 • TD02
Timing for SMBus Interface
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC1695CS5#TRPBF

Mfr. #:
Buy LTC1695CS5#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Motor / Motion / Ignition Controllers & Drivers SMBus/I2C Fan Speed Cntr in SOT-23
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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