LTC3411 Datasheet, PDF (20/20 Pages) Linear Technology – 1.25A, 4MHz, Synchronous Step-Down DC/DC Converter

LTC3411
TYPICAL APPLICATIO
V_IN
2.63V
TO 4.2V
2mm Height, 2MHz, Li-Ion to 1.8V Converter
C6 ⁺ C1
1µF
33µF
C7
47pF
R3
15k
C3
470pF
PV_IN
PGOOD
SV_IN
SW
LTC3411
SYNC/MODE
I_TH
V_FB
SGND PGND SHDN/R_T
R5
100k
PGOOD
L1
1µH
C4 22pF
R1
R2
698k 887k
R4
154k
+ _C2
33µF
C1, C2: AVX TPSB336K006R0600
C4, C5: TAIYO YUDEN LMK212BJ105MG
L1: COILCRAFT DO1606T-102
Efficiency vs Load Current
100
95
90
2.5V
85
3.6V
80
75
70
4.2V
65
60
55
V_OUT = 1.8V
f_O = 2MHz
50
1
10
100
1000
LOAD CURRENT (mA)
10000
3411 TA05
V_OUT
1.8V
C5 ^{AT 1.25A}
1µF
3411 TA04
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PART NUMBER
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DESCRIPTION
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3A (I_OUT Sink/Source) 2MHz Monolithic Synchronous Regulator
for DDR/QDR Memory Termination
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ThinSOT is a trademark of Linear Technology Corporation.
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ^q FAX: [phone] ^q www.linear.com
COMMENTS
90% Efficiency, V_IN: 3.6V to 25V, V_OUT(MIN): 1.25V,
I_Q: 1.9mA, I_SD: <1µA, ThinSOT
90% Efficiency, V_IN: 7.4V to 40V, V_OUT(MIN): 1.24V,
I_Q: 3.2mA, I_SD: 30µA, N8, S8
95% Efficiency, V_IN: 2.7V to 10V, V_OUT(MIN): 0.8V,
I_Q: 15µA, I_SD: <1µA, TSSOP16
95% Efficiency, V_IN: 2.7V to 6V, V_OUT(MIN): 0.8V,
I_Q: 20µA, I_SD: <1µA, ThinSOT
95% 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): 0.8V,
I_Q: 60µA, I_SD: <1µA, TSSOP16E
90% Efficiency, V_IN: 2.25V to 5.5V, V_OUT(MIN): V_REF/2,
I_Q: 280µA, I_SD: <1µA, TSSOP16E
90% Efficiency, V_IN: 5.5V to 60V, V_OUT(MIN): 1.20V,
I_Q: 2.5mA, I_SD: 25µA, TSSOP16E
95% Efficiency, V_IN: 2.5V to 5.5V, V_OUT(MIN): 2.5V,
I_Q: 25µA, I_SD: <1µA, 10-Lead MS
sn3411 3411fs
LT/TP 0503 2K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2002