Datasheet

LT3796/LT3796-1
29
3796fa
For more information www.linear.com/3796
28V
IN
to 28V SuperCap Charger with Input Current Limit and Charge Done Flag
TYPICAL APPLICATIONS
Input and Output Current vs Output Voltage
V
OUT
(V)
0
800
600
200
1800
37961 TA06b
5
10 15 25
I
OUT
20 30
400
0
1000
1600
1400
1200
INPUT/OUTPUT CURRENT (mA)
I
IN
CSPV
S
V
IN
CSN
CTRL
RT
V
C
V
REF
R1
20k
LT3796
37961 TA06a
PWM
SYNC
CSOUT
FB2
V
REF
OUTPUT CURRENT REPORTING
L1: COILCRAFT MSD1260-333
D1: ON SEMI MBRS260T3G
M1: VISHAY SILICONIX Si7850
Q1: ZETEX FMMT591A
SS
EN/UVLO
ISMON
GND
FB1
ISP
ISN
TG
INTV
CC
GATE
SENSE
L1A 33µH
L1B
R
SNS1
150mΩ
1.33A MAX
V
OUT
= 0V TO 28V
28V
D1
C
C
22nF
R
C
499Ω
R
T
19.6k
400kHz
C6
4.7µF
C4
0.1µF
C1
10µF
V
IN
C2
4.7µF
×2
50V
C6
2.2µF ×2
R9
24.9k
R
SNS
33mΩ
R
SNS2
150mΩ
SUPERCAP
M1
1.67A
MAX
R2
124k
R5
1M
R3
499k
R10
499k
V
OUT
R4
30.1k
Q1
C3
0.1µF
CSOUT
C7
0.1µF
R8
536k
C5
0.1µF
•
•
INPUT CURRENT
REPORTING AND LIMIT
CHGDONE
FAULT
VMODE
FAULT
R7
100k
R6
100k
INTV
CC