LTC3612_15 Datasheet, PDF (30/30 Pages) Linear Technology – 3A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter

LTC3612
Typical Application
DDR Termination with Ratiometric Tracking of V_DD, 1MHz
V_IN
3.3V
C1
C2
22µF
22µF
SV_IN
PV_IN
V_DD
1.8V
R6
562k
RUN
TRACK/SS
PV_{IN_DRV}
DDR
R3
100k
RT/SYNC
R8
365k
LTC3612
L1
R7
1µH
187k
PGOOD
R_C
6k
PGOOD
SW
SGND
C4
100µF
C_C
R4
2.2nF
1M
ITH
C_C1
10pF
MODE
PGND
V_FB
R1
200k
R2
C3
R5
L1: COILCRAFT DO3316T
1M
200k
22pF
3612 TA04a
V_TT
0.9V
C5 _±1.5A
47µF
Ratiometric Start-Up
V_DD
500mV/DIV
V_TT
500µs/DIV
3612 TA04b
Related Parts
PART NUMBER
LTC3614
LTC3616
LTC3601
LTC3603
LTC3605
LTC3412A
LTC3413
DESCRIPTION
5.5V, 4A (I_OUT), 4MHz, Synchronous Step-Down DC/DC
Converter with Tracking and DDR
5.5V, 6A (I_OUT), 4MHz, Synchronous Step-Down DC/DC
Converter with Tracking and DDR
15V, 1.5A (I_OUT), Synchronous Step-Down DC/DC Converter
15V, 2.5A, Synchronous Step-Down DC/DC Converter
15V, 5A (I_OUT), Synchronous Step-Down DC/DC Converter
5.5V, 3A (I_OUT), 4MHz, Synchronous Step-Down
DC/DC Converter
5.5V, 3A (I_OUT Sink/Source), 2MHz, Monolithic Synchronous
Regulator for DDR/QDR Memory Termination
COMMENTS
95% Efficiency, V_IN: 2.25V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 75µA,
I_SD < 1µA, 3mm × 5mm QFN-24 Package
95% Efficiency, V_IN: 2.25V to 5.5V, V_OUT(MIN) = 0.6V, I_Q = 75µA,
I_SD < 1µA, 3mm × 5mm QFN-24 Package
95% Efficiency, V_IN: 4.5V to 15V, V_OUT(MIN) = 0.6V, I_Q = 300µA,
I_SD < 1µA, MSOP-16E and 3mm × 3mm QFN-16 Packages
92% Efficiency, V_IN: 4.5V to 15V, V_OUT(MIN) = 0.6V, I_Q = 75µA, I_SD < 1µA,
4mm × 4mm QFN-16 Package
95% Efficiency, V_IN: 4V to 15V, V_OUT(MIN) = 0.6V, I_Q = 2mA, I_SD < 15µA,
4mm × 4mm QFN-24 Package
95% Efficiency, V_IN: 2.25V to 5.5V, V_OUT(MIN) = 0.8V, I_Q = 60µA,
I_SD < 1µA, TSSOP-16E and 4mm × 4mm QFN-16 Packages
90% Efficiency, V_IN: 2.25V to 5.5V, V_OUT(MIN) = V_REF/2, I_Q = 280µA,
I_SD < 1µA, TSSOP-16E Package
30 ^{Linear Technology Corporation}
1630 McCarthy Blvd., Milpitas,
[phone] ^● FAX: [phone]
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www.linear.com/LTC3612
3612fc
LT 1114 REV C • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 2009