LTC3832-1_15 Datasheet, PDF (19/24 Pages) Linear Technology – High Power Step-Down Synchronous DC/DC Controllers for Low Voltage Operation

LTC3832/LTC3832-1
APPLICATIO S I FOR ATIO
100Ω
+
4.7µF
OPTIONAL
D_Z
12V
1N5242
+
10µF
1µF
0.01µF
NC
1N5817
1N5817
PV_CC2 PV_CC1
V_CC
G1
SS
I_MAX
LTC3832 I_FB
FREQSET
G2
SHDN
SHDN
PGND
5.6k ^0.1µF
0.1µF
1k
1N5817
V_IN
+ C_IN
3.3V
330µF
×2
0.1µF
Q2
Q1A, Q1B
2 IN PARALLEL
L_O
1.3µH
D1
+ C_OUT
470µF
×3
V_OUT
2.5V
14A
C1
180pF
R_C
18k
COMP
GND
SENSE⁺
C_C
1500pF
SENSE^{– FB}
NC
C_IN: SANYO 6TPB330M
C_OUT: SANYO 4TPB470M
D1: MBRS330T3
L_O: SUMIDA CDEP105-1R3-MC-S
Q1A, Q1B, Q2: FAIRCHILD FDS6670A
3832 F12a
Figure 12. Typical 3.3V to 2.5V, 14A Application
Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
T_A = 25°C
V_IN = 3.3V
10 ^VOUT ^{= 2.5V}
REFER TO FIGURE 12
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
LOAD CURRENT (A)
3832 F12b
sn3832 3832fs
19