LTC3404 Datasheet, PDF (14/16 Pages) Linear Technology – 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator

LTC3404
APPLICATIO S I FOR ATIO
47pF
LTC3404
1
RUN
8
PLL LPF
10µF***
CER
2
7
I_TH SYNC/MODE
3
6
V_FB
4
V_IN
5
6.2µH*
GND
SW
22µF**
CER
V_IN
2.65V
TO 4.2V
V_OUT
2.5V
887k
3404 F08a
412k
20pF
*TOKO D63LCB A920CY-6R2M
**TAIYO-YUDEN CERAMIC JMK325BJ226MM
***TAIYO-YUDEN CERAMIC LMK325BJ106MN
95
V_IN = 3V
90
V_IN = 3.6V
85
80
V_IN = 4.2V
75
70
0.1
V_OUT = 2.5V
L = 6.2µH
1.0
10
100
OUTPUT CURRENT (mA)
1000
3404 F8b
Figure 8. Single Lithium-Ion to 2.5V/0.3A Regulator from Design Example
TYPICAL APPLICATIO S
Single Li-Ion to 2.5V/0.6A Regulator
Using All Ceramic Capacitors
47pF
LTC3404
1
RUN
8
PLL LPF
2
7
I_TH SYNC/MODE
3
V_FB
6
V_IN
4
GND
5
SW
4.7µH*
20pF 887k
*TOKO D52LC A914BYW-4R7M
**TAIYO-YUDEN CERAMIC JMK325BJ226MM
***TAIYO-YUDEN CERAMIC LMK325BJ106MN
412k
3404 TA03
C_OUT**
22µF
CER
V_OUT
2.5V
0.6A
V_IN
C_IN*** ^{3V TO 4.2V}
10µF
CER
14
3- to 4-Cell NiCd/NiMH to 1.8V/0.5A Regulator
Using All Ceramic Capacitors
47pF
LTC3404
1
RUN
8
PLL LPF
2
7
I_TH SYNC/MODE
3
V_FB
6
V_IN
4
GND
5
SW
4.7µH*
*TOKO D52LC A914BYW-4R7M
**TAIYO-YUDEN CERAMIC JMK325BJ226MM
***TAIYO-YUDEN CERAMIC LMK325BJ106MN
20pF ^887k
698k
3404 TA04
C_OUT**
22µF
CER
V_OUT
1.8V
0.5A
V_IN
C_IN*** ^{2.7V TO 6V}
10µF
CER