LTC3404 Datasheet, PDF (15/16 Pages) Linear Technology – 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator

TYPICAL APPLICATIO S
Externally Synchronized 2.5V/0.6A Regulator
Using All Ceramic Capacitors
47pF
LTC3404
1
RUN
8
PLL LPF
2
7
I_TH SYNC/MODE
3
6
V_FB
V_IN
4
5
GND
SW
0.01µF
10k
EXT CLOCK
1.7MHz
4.7µH*
20pF 887k
*TOKO D52LC A914BYW-4R7M
**TAIYO-YUDEN CERAMIC JMK325BJ226MM
***TAIYO-YUDEN CERAMIC LMK325BJ106MN
412k
3404 TA04
V_OUT
2.5V
C_OUT** _0.6A
22µF
CER
LTC3404
V_IN
C_IN*** ^{3V TO 6V}
10µF
CER
Low Noise 2.5V/0.3A Regulator
LTC3404
1
RUN
8
PLL LPF
2
7
I_TH SYNC/MODE
47pF
3
6
V_FB
4
V_IN
5
6.2µH*
GND
SW
*TOKO D63LCB A920CY-6R2M
**TAIYO-YUDEN CERAMIC JMK325BJ226MM
***TAIYO-YUDEN CERAMIC LMK325BJ106MN
20pF 887k
412k
3404 TA06
C_OUT**
22µF
CER
V_OUT
2.5V
0.3A
V_IN
C_IN*** ^{2.65V TO 6V}
10µF
CER
3- to 4-Cell NiCd/NiMH to 3.3V/0.5A Regulator
Using All Ceramic Capacitors
LTC3404
1
RUN
8
PLL LPF
47pF
2
7
I_TH SYNC/MODE
3
6
V_FB
V_IN
4
5
GND
SW
4.7µH*
*TOKO D52LC A914BYW-4R7M
**TAIYO-YUDEN CERAMIC JMK325BJ226MM
***TAIYO-YUDEN CERAMIC LMK325BJ106MN
†_{VOUT CONNECTED TO VIN FOR 2.7V < VIN < 3.3V}
20pF 887k
280k
3404 TA06
C_OUT**
22µF
CER
V_OUT^†
3.3V
0.5A
V_IN
C_IN*** ^{2.7V TO 6V}
10µF
CER
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
15