LTC3404IMS8 Datasheet, PDF (16/16 Pages) Linear Technology – 1.4MHz High Efficiency Monolithic Synchronous Step-Down Regulator

LTC3404
TYPICAL APPLICATIO S
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
Single Li-Ion to 2.5V/0.5A Regulator with Precision 2.7V Undervoltage Lockout
1.58M
1%
1.18M
1%
LTC1540
1
8
GND OUT
2 _V–
V^{+ 7}
3 _IN+
6
REF
4 _IN–
5
HYS
44.2k
1%
2.37M
1%
0.1μF
10k
47pF
0.01μF
LTC3404
1
RUN
8
PLL LPF
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
20pF 887k
412k
3404 TA08
C_OUT**
22μF
CER
V_OUT
2.5V
0.6A
V_IN
C_IN*** ^{2.7V TO 4.2V}
10μF
CER
RELATED PARTS
PART NUMBER
LTC1174/LTC1174-3.3
LTC1174-5
LTC1265
LTC1474/LTC1475
LTC1504A
LTC1622
LTC1626
DESCRIPTION
High Efficiency Step-Down and Inverting DC/DC Converters
1.2A, High Efficiency Step-Down DC/DC Converter
Low Quiescent Current Step-Down DC/DC Converters
Monolithic Synchronous Step-Down Switching Regulator
Low Input Voltage Current Mode Step-Down DC/DC Controller
Low Voltage, High Efficiency Step-Down DC/DC Converter
LTC1627
Monolithic Synchronous Step-Down Switching Regulator
LTC1701
Monolithic Current Mode Step-Down Switching Regulator
LTC1707
Monolithic Synchronous Step-Down Switching Regulator
LTC1772
LTC1877
LTC1878
Low Input Voltage Current Mode Step-Down DC/DC Controller
High Efficiency Monolithic Step-Down Regulator
High Efficiency Monolithic Step-Down Regulator
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
COMMENTS
Monolithic Switching Regulators, I_OUT to 450mA,
Burst Mode Operation
Constant Off-Time, Monolithic, Burst Mode Operation
Monolithic, I_OUT to 250mA, I_Q = 10μA, 8-Pin MSOP
Low Cost, Voltage Mode I_OUT to 500mA, V_IN from 4V to 10V
High Frequency, High Efficiency, 8-Pin MSOP
Monolithic, Constant Off-Time, I_OUT to 600mA,
Low Supply Voltage Range: 2.5V to 6V
Constant Frequency, I_OUT to 500mA, Secondary Winding
Regulation, V_IN from 2.65V to 8.5V
Constant Off-Time, I_OUT to 500mA, 1MHz Operation,
V_IN from 2.5V to 5.5V
1.19V V_REF Pin, Constant Frequency, I_OUT to 600mA,
V_IN from 2.65V to 8.5V
550kHz, 6-Pin SOT-23, I_OUT Up to 5A, V_IN from 2.2V to 10V
550kHz, MS8, V_IN Up to 10V, I_Q = 10μA, I_OUT to 600mA at V_IN = 5V
550kHz, MS8, V_IN Up to 6V, I_Q = 10μA, I_OUT to 600mA at V_IN = 3.3V
3404fb
LT 0607 REV B • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2000