LTC3409_15 Datasheet, PDF (16/16 Pages) Linear Technology – 600mA Low VIN Buck Regulator in 3mm 3mm DFN

LTC3409
TYPICAL APPLICATION
2-Cell to 1.2V/600mA Regulator for High Efficiency and Low Profile
V_IN
1.8V TO 3V
C_IN
4.7μF
CER
LTC3409
3, 4
6
V_IN
SW
7 _RUN
5
MODE
8
SYNC
1
V_FB
2.2μH*
22pF
301k ^287k
V_OUT
C_OUT ^1.2V
10μF
CER
GND SGND
9
2
3409 TA02a
C_IN: TDK C1608X5R0J475M
C_OUT: TDK C1608X5R0G106M
*SUMIDA CDRH2D09NP-2R2NC
Efficiency
95
V_IN = 1.8V
90 ^VOUT ^{= 1.2V}
85 f = 1.7MHz
80
f = 2.6MHz
75
70
65
60
55
50
0.0001
0.001
0.01
0.1
OUTPUT CURRENT (mA)
1
3409 TA02b
Load Step
V_OUT
100mV/DIV
AC-COUPLED
I_L
500mA/DIV
I_LOAD
500mA/DIV
V_IN = 1.8V
20μs/DIV
V_OUT = 1.2V
I_LOAD = 200mA TO 600mA
3409 TA02c
RELATED PARTS
PART NUMBER
LTC1878
LTC1879
LT3020
DESCRIPTION
600mA (I_OUT), 550kHz, Synchronous Step-Down
DC/DC Converter
1.20A (I_OUT), 550kHz, Synchronous Step-Down
DC/DC Converter
100mA, Low Voltage VLDO™
LTC3025
100mA, Low Voltage VLDO
LTC3404
600mA (I_OUT), 1.4MHz, Synchronous Step-Down
DC/DC Converter
LTC3405/LTC3405A 300mA (I_OUT), 1.5MHz, Synchronous Step-Down
DC/DC Converter
LTC3406/LTC3406B 600mA (I_OUT), 1.5MHz, Synchronous Step-Down
DC/DC Converter
LTC3407/LTC3407-2 Dual, 600mA/800mA (I_OUT), 1.5MHz/2.25MHz,
Synchronous Step-Down DC/DC Converter
LTC3411
1.25A (I_OUT), 4MHz, Synchronous Step-Down
DC/DC Converter
VLDO and ThinSOT are trademarks of Linear Technology Corporation.
16 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
COMMENTS
96% Efficiency, V_IN: 2.7V to 6V, V_OUT(MIN) = 0.8V, I_Q = 10μA,
I_SD <1μA, MS8 Package
95% Efficiency, V_IN: 2.7V to 10V, V_OUT(MIN) = 0.8V, I_Q = 15μA,
I_SD <1μA, 16-Lead TSSOP
V_IN: 0.9V to 10V, V_OUT(MIN) = 0.20V, Dropout Voltage = 0.15V,
I_Q = 120μA, I_SD <3μA, V_OUT = ADJ, DFN/MS8 Packages
V_IN: 0.9V to 5.5V, V_OUT(MIN) = 0.40V, Dropout Voltage = 0.05V,
I_Q = 54μA, I_SD <1μA, V_OUT = ADJ, DFN Package
96% Efficiency, V_IN: 2.7V to 6V, V_OUT(MIN) = 0.8V, I_Q = 10μA,
I_SD <1μA, MS8 Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 20μA,
I_SD <1μA, ThinSOT™ Package
96% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 20μA,
I_SD <1μA, ThinSOT Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 40μA,
I_SD <1μA, 10-Lead MSE Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 60μA,
I_SD <1μA, 10-Lead MS Package
3409fc
LT 0309 REV C • PRINTED IN THE USA
© LINEAR TECHNOLOGY CORPORATION 2005