LTC3568_15 Datasheet, PDF (18/18 Pages) Linear Technology – 1.8A, 4MHz, Synchronous Step-Down DC/DC Converter

LTC3568
Typical Application
V_IN
2.5V
TO 4.2V
C7
47pF
1mm Height, 2MHz, Li-Ion to 1.8V Converter
C1
10µF
x2
R3
10k
C3
1000pF
PV_IN
PGOOD
SV_IN
SW
LTC3568
SYNC/MODE
I_TH
V_FB
SGND PGND SHDN/R_T
R5
100k
PGOOD
L1
1µH
C4 22pF
R1
R2
698k 887k
R4
154k
C1, C2: MURATA GRM319R60J106KE01B
L1: COOPER SD10-1R0
V_OUT
1.8V
C2 ^{AT 1.8A}
10µF
x3
3568 TA02
Efficiency vs Load Current
95
V_IN = 2.7V
90
85
80
V_IN = 4.2V _{VIN = 3.6V}
75
70
65
V_OUT = 1.8V
60 ^{fO = 2MHz}
1
10
100
1000
LOAD CURRENT (mA)
10000
3568 TA03
Related Parts
PART NUMBER
DESCRIPTION
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LTC3531/LTC3531-3/ 200mA (I_OUT), 1.5MHz, Synchronous Buck-Boost DC/DC Converter
LTC3531-3.3
LTC3532
500mA (I_OUT), 2MHz, Synchronous Buck-Boost DC/DC Converter
LTC3542
500mA (I_OUT), 2.25MHz, Synchronous Step-Down DC/DC Converter
LTC3544
LTC3547/LTC3547B
Quad 300mA + 2x 200mA + 100mA 2.25MHz, Synchronous Step-Down
DC/DC Converter
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DC/DC Converter
LTC3560
800mA (I_OUT), 2.25MHz, Synchronous Step-Down DC/DC Converter
COMMENTS
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, MS10E and DFN Packages
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V,
I_Q = 26µA, I_SD <1µA, SC70 Package
96% Efficiency, V_IN: 2.6V to 5.5V, V_OUT(MIN) = 0.8V,
I_Q = 60µA, I_SD <1µA, MS10 and DFN Packages
96% Efficiency, V_IN: 2.6V to 5.5V, V_OUT(MIN) = 0.8V,
I_Q = 62µA, I_SD <1µA, TSSOP-16E and QFN Packages
95% Efficiency, V_IN: 1.8V to 5.5V, V_OUT(MIN): 2V to 5V,
I_Q = 16µA, I_SD <1µA, ThinSOT and DFN Packages
95% Efficiency, V_IN: 2.4V to 5.5V, V_OUT(MIN): 2.4V to
5.25V, I_Q = 35µA, I_SD <1µA, MS10 and DFN Packages
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V,
I_Q = 26µA, I_SD <1µA, DFN Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V,
I_Q = 70µA, I_SD <1µA, QFN Package
96% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V,
I_Q = 40µA, I_SD <1µA, DFN Package
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V,
I_Q = 40µA, I_SD <1µA, MS10E and DFN Packages
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V,
I_Q = 16µA, I_SD <1µA, ThinSOT Package
18 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
3568fa
LT 0910 REV A • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2007