LTC3565_1 Datasheet, PDF (22/22 Pages) Linear Technology – 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter

LTC3565
Typical Application
V_IN
2.5V
TO 4.2V
1mm Height, 2MHz, Li-Ion to 1.8V Converter
C1
10µF
R3
13.3k
C3
470pF
PV_IN
PGOOD
SV_{IN LTC3565} SW
RUN
SYNC/MODE
ITH
V_FB
GND
RT
R5
100k
PGOOD
L1
0.9µH
C4, 22pF
R4
80.6k
R2
R1 464k
232k
C1, C2: TAIYO YUDEN JMK107BJ106MA
L1: FDK MIPW3226DORGM
3565 TA04a
V_OUT
1.8V
C2 ^{AT 1.25A}
10µF
×2
Efficiency vs Output Current
100
90
80
70
60
50
40
30
20
V_OUT = 1.8V
10 f_O = 2MHz
V_IN = 2.7V
V_IN = 3.6V
V_IN = 4.2V
0
0.1
1
10
100 1000 10000
OUTPUT CURRENT (mA)
3565 TA04b
V_OUT
100mV/DIV
AC COUPLED
I_L
1A/DIV
I_LOAD
1A/DIV
40µs/DIV
V_IN = 3.6V
V_OUT = 1.8V
I_LOAD = 50mA TO 1.25A
3565 TA04c
V_OUT
100mV/DIV
AC COUPLED
I_L
1A/DIV
I_LOAD
1A/DIV
40µs/DIV
V_IN = 3.6V
V_OUT = 1.8V
I_LOAD = 250mA TO 1.25A
3565 F04d
Related Parts
PART NUMBER
LTC3406/LTC3406B
DESCRIPTION
600mA (I_OUT), 1.5MHz Synchronous Step-Down DC/DC Converters
LTC3407A/LTC3407AB Dual 600mA/800mA (I_OUT), 1.5MHz/2.25MHz Synchronous
Step-Down DC/DC Converters
LTC3410/LTC3410B 300mA (I_OUT), 2.25MHz Synchronous Step-Down DC/DC Converters
LTC3411A
1.25A (I_OUT), 4MHz Synchronous Step-Down DC/DC Converter
LTC3412A
3A (I_OUT), 4MHz Synchronous Step-Down 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™
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V,
I_Q = 40µA, I_SD < 1µA, MS10E, DFN
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V,
I_Q = 26µA, I_SD < 1µA, SC70
96% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.8V,
I_Q = 60µA, I_SD < 1µA, MS10, 3mm × 3mm DFN
96% Efficiency, V_IN: 2.25V to 5.5V, V_OUT(MIN) = 0.8V,
I_Q = 62µA, I_SD < 1µA, TSSOP16E, 4mm × 4mm QFN
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN) = 0.6V,
I_Q = 16µA, I_SD < 1µA, ThinSOT
22 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^● FAX: [phone] ^● www.linear.com
3565fa
LT 0210 REV A • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2009