LT8697
Typical applicaTion
High Efficiency 5.2V Step-Down Converter with
Efficiency vs Load
Programmable Output Current Limit and SYNC
100
95
90
85
80
75
70
65
60
55
50
V
IN
6V TO 42V
C
BST
C
IN
10µF
0.1µF
V
BST
IN
L
R
SENSE
22µH
0.018Ω
V
OUT
EN/UV
SW
5.2V
CURRENT LIMIT
0.5A TO 2.4A
f
= 300kHz
SW
2.67A/V FOR
= 0.2V TO 1V
ICTRL
INTV
SYS
LT8697
R
= 18mΩ
C
R
SENSE
DCR = 20mΩ
OUT
V
CTRL
CDC
CC
100µF
10k
L
C
VCC
R
V
= OPEN
= 5.2V
CBL
OUT
100k
PG
ISP
ISN
1µF
300kHz TO
500kHz
SYNC
TR/SS
RT
L = 22µH SUMIDA
8697 TA06
V
V
V
= 8V
= 12V
= 24V
USB5V
RCBL
IN
IN
IN
C
SS
C
C
C
C
: X7R OR X5R
IN
10nF
: 1210 CASE SIZE, X7R OR X5R
: X7R OR X5R
OUT
VCC
249k
R
T
140k
GND
PGND
0
0.5
1.0
1.5
2.0
2.5
: X7R OR X5R
BST
L: SUMIDA CRH15D78/ANP-220MC
LOAD CURRENT (A)
f
= 300kHz TO 500kHz
IN
SW
FOR V = 6.5V TO 27V
8697 TA06b
relaTeD parTs
PARꢂ NUMBER DESCRIPꢂION
COMMENꢂS
= 3.4V, V
LT8610
42V, 2.5A, 96% Efficiency, 2.2MHz Synchronous Micropower
Step-Down DC/DC Converter with I = 2.5µA
V
= 42V, V
= 0.985V, I = 2.5µA,
Q
IN(MIN)
IN(MAX)
OUT(MIN)
I
<1µA, MSOP-16E Package
Q
SD
LT8611
42V, 2.5A, 96% Efficiency, 2.2MHz Synchronous Micropower
V
SD
= 3.4V, V
= 42V, V
= 0.985V, I = 2.5µA,
Q
IN(MIN)
IN(MAX)
OUT(MIN)
Step-Down DC/DC Converter with I = 2.5µA and Input/Output
I
<1µA, 3mm × 5mm QFN-24
Q
Current Limit/Monitor
LT3690
36V with 60V Transient Protection, 4A, 92% Efficiency, 1.5MHz
Synchronous Micropower Step-Down DC/DC Converter with
Q
V
SD
= 3.9V, V
= 36V, V
= 0.985V, I = 70µA,
Q
IN(MIN)
IN(MAX)
OUT(MIN)
I
<1µA, 4mm × 6mm QFN-26
I = 70µA
LT3971A-5
LT3991
LT3970
LT3990
LT3480
LT3980
38V, 1.2A, 2.2MHz High Efficiency Micropower Step-Down
V
= 4.2V, V
= 40V, V
= 1.21V, I = 2.8µA,
Q
IN(MIN)
IN(MIN)
OUT(MIN)
DC/DC Converter with I = 2.8µA
I
<1µA, MSOP-10E
SD
Q
55V, 1.2A, 2.2MHz High Efficiency Micropower Step-Down
V
SD
= 4.2V, V
= 62V, V
= 1.21V, I = 2.8µA,
OUT(MIN) Q
IN(MIN)
IN(MAX)
DC/DC Converter with I = 2.8µA
I
<1µA, 3mm × 3mm DFN-10, MSOP-10E
Q
40V, 350mA, 2.2MHz High Efficiency Micropower Step-Down
V
SD
= 4.2V, V
= 40V, V
= 1.21V, I = 2.5µA,
OUT(MIN) Q
IN(MIN)
IN(MAX)
DC/DC Converter with I = 2.5µA
I
<1µA, 3mm × 2mm DFN-10, MSOP-10
Q
62V, 350mA, 2.2MHz High Efficiency Micropower Step-Down
V
SD
= 4.2V, V
= 62V, V
= 1.21V, I = 2.5µA,
OUT(MIN) Q
IN(MIN)
IN(MAX)
DC/DC Converter with I = 2.5µA
I
<1µA, 3mm × 2mm DFN-10, MSOP-10
Q
36V with Transient Protection to 60V, 2A (I ), 2.4MHz, High
V
= 3.6V, V
= 36V, Transient to 60V, V
=
OUT
IN(MIN)
IN(MAX)
OUT(MIN)
Efficiency Step-Down DC/DC Converter with Burst Mode® Operation 0.78V, I = 70µA, I <1µA, 3mm × 3mm DFN-10, MSOP-10E
Q
SD
58V with Transient Protection to 80V, 2A (I ), 2.4MHz, High
V
= 3.6V, V
Q
= 58V, Transient to 80V, V
=
OUT
IN(MIN)
IN(MAX)
SD
OUT(MIN)
Efficiency Step-Down DC/DC Converter with Burst Mode Operation 0.78V, I = 85µA, I <1µA, 3mm × 4mm DFN-16, MSOP-16E
8697p
LT 0713 • PRINTED IN USA
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
28
For more information www.linear.com/LT8697
(408)432-1900 FAX: (408) 434-0507 www.linear.com/LT8697
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LINEAR TECHNOLOGY CORPORATION 2013
LINEAR_DIMENSIONS [ Linear Dimensions ]
