LTC3769_15 Datasheet, PDF (28/32 Pages) Linear Technology – 60V Low IQ Synchronous Boost Controller

LTC3769
Typical Applications
C_SS
0.1µF
C_ITH
10nF
R_ITH
4.75k
C_ITHA
820pF
R_A
64.9k
R_B
475k
VBIAS
SENSE⁺
I_LIM ^LTC3769
EXTV_CC
OVMODE
SENSE^–
RUN
FREQ
TG
SW
C_B
SS
0.1µF
BOOST
ITH
BG
D
INTV_CC
GND
VFB
PLLIN/MODE
100k
PGOOD
R_SENSE
2mΩ
L
1.3µH
MTOP
MBOT
C_INT
4.7µF
C_INA +
10µF
×2
C_INB
50µF
×2
V_IN
5V TO 60V START-UP
VOLTAGE OPERATES THROUGH
TRANSIENTS DOWN TO 2.3V
C_OUTA +
10µF
×3
C_OUTB
56µF
×2
V_OUT*
10V
5A
L: WÜRTH 7443551130
MBOT, MTOP: INFINEON BSC028N06L53
D: BAS170W
*WHEN V_IN > 10V, V_OUT FOLLOWS V_IN.
C_INA, C_OUTA: GRM32ER71J106KA12L
C_INB, C_OUTB: SUNCON 63HVH56M
3769 F10
Figure 10. High Efficiency 10V Boost Converter
41.2k
C_SS
0.1µF
C_ITH
15nF
R_ITH
8.66k
C_ITHA
220pF
R_A
12.1k
R_B
232k
VBIAS
I_LIM
SENSE⁺
LTC3769
EXTV_CC
OVMODE
RUN
FREQ
SENSE^–
TG
SW
SS
BOOST
ITH
BG
INTV_CC
GND
PLLIN/MODE
VFB
PGOOD
C1
0.1µF
R_S2
53.6k RS1
1% 26.1k
1%
C_B
0.1µF
D
C_INT
4.7µF
100k
L
10.2µH
MTOP
MBOT
C1: TDK C1005X7R1C104K
C_IN, C_OUTA: TDK C4532X5R1E226M
C_OUTB: SUNCON, 50CE220AX
L: PULSE PA2050.103NL
MBOT, MTOP: RENESAS RJK0305
D: INFINEON BAS140W
C_IN
22µF
V_IN
8V TO 24V
C_OUTA ⁺
22µF
×4
C_OUTB
220µF
V_OUT
24V*
4A
3769 F11a
100
98
96
94
92
90
88
86
0
V_IN = 12V
V_IN = 9V
V_IN = 6V
12
3
4
5
6
OUTPUT CURRENT (A)
3769 F11b
Figure 11. High Efficiency 24V Boost Converter with Inductor DCR Current Sensing
3769f
28
For more information www.linear.com/LTC3769