LT8697
Typical applicaTions
ꢂransient Response ꢂhrough ꢀ Meters AWG
20 ꢂwisted-Pair Cable
2MHz 5V Step-Down Converter with Cable Drop Compensation
V
IN
C
BST
5.50
5.25
5.00
4.75
4.50
4.25
5
4
3
2
1
0
3 METERS AWG 20
TWISTED PAIR CABLE
0.1µF
C
4.7µF
IN
V
OUT
V
IN
BST
L
R
SENSE
3.3µH
0.018Ω
0.1Ω
V
EN/UV
SW
OUT
PG
SYS
LT8697
C
C
CDC
OUT
INTV
1nF
47µF
CC
V
LOAD
C
VCC
R
CDC
10k
×2
+
ICTRL
SYNC
TR/SS
RT
ISP
ISN
1µF
V
LOAD
5V
I
LOAD
2.4A
USB5V
RCBL
50mA/µs
C
SS
–
10nF
R
CBL
R
T
GND
PGND
18.2k
16.5k
0.1Ω
8697 TA03a
100µs/DIV
8697 TA03b
f
= 2MHz FOR
= 8V TO 27V
SW
IN
V
C
C
C
C
: X7R OR X5R
L: COILCRAFT XAL7070-332
BST
IN
: X7R OR X5R
V
V
= 42V
IN(MAX)
IN(MIN)
: 1210 CASE SIZE, X7R OR X5R
OUT
: X7R OR X5R
VCC
= 5.7V AT 1A I
LOAD
LOAD
6.3V AT 2.4A I
ꢂransient Response
0.5A to 1.5A Load Step
2MHz 5.1V Step-Down Converter with Cable Drop Compensation
and Output Current Monitor
V
5.25
IN
C
BST
C
4 METERS AWG20
V
LOAD
IN
0.1µF
L
4.7µF
TWISTED PAIR CABLE
V
BST
V
IN
OUT
R
SENSE
0.02Ω
5.00
4.75
3.3µH
0.13Ω
EN/UV
SW
+
R
10k
CDC
PG
SYS
V
5.1V
2.1A
LT8697
C
47µF
LOAD
OUT
INTV
CC
C
C
×2
VCC
CDC
1nF
ICTRL
SYNC
TR/SS
RT
ISP
ISN
I
1µF
LOAD
1.00
0.50
0
2
1
0
–
0.13Ω
10mA/µs
USB5V
RCBL
8697 TA04a
100k
CBL
V
C
10nF
V
MON
SS
MON
0.41V/A
0.41V/A
R
500k
5V1
R
R
T
GND
PGND
16.5k
15.4k
8697 TA04b
400µs/DIV
f
= 2MHz FOR
= 8V TO 27V
SW
IN
C
C
C
C
: X7R OR X5R
L1: SUMIDA CDRR105NP-3R3NC
BST
IN
V
: X7R OR X5R
V
V
= 42V
IN(MAX)
IN(MIN)
: 1210 CASE SIZE, X7R OR X5R
OUT
: X7R OR X5R
VCC
= 5.8V AT 1A I
6.5V AT 2.1I
LOAD
LOAD
8697p
25
For more information www.linear.com/LT8697
LINEAR_DIMENSIONS [ Linear Dimensions ]
