ltc3612 Linear Technology Corporation, ltc3612 Datasheet - Page 28

• Manufacturer Part Number: ltc3612
• Description: 3a, 4mhz Monolithic Synchronous Step-down Dc/dc Converter
• Manufacturer: Linear Technology Corporation

LTC3612
RELATED PARTS
PART NUMBER
LTC3605
LTC3602
LTC3603
LTC3608
LTC3610
LTC3611
LTC3412A
LTC3413
LTC3414
LTC3415
LTC3416
LTC3418
28
TYPICAL APPLICATION
3.3V
1.8V
V
V
DD
IN
C1
22μF
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
R6
562k
R7
187k
DDR Termination With Ratiometric Tracking of V
C2
22μF
DESCRIPTION
15V, 5A (I
10V, 2.5A (I
15V, 2.5A Synchronous Step-Down DC/DC Converter
18V, 8A (I
24V, 12A (I
32V, 10A (I
5.5V, 3A (I
5.5V, 3A (I
DDR/QDR Memory Termination
5.5V, 4A (I
5.5V, 7A (I
5.5V, 4A (I
Tracking
5.5V, 8A (I
R4
1M
R5
1M
PGOOD
OUT
OUT
●
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
FAX: [phone]
C
2.2nF
L1: COILCRAFT DO3316T
C
), Synchronous Step-Down DC/DC Converter
), 1MHz, Synchronous Step-Down DC/DC Converter
R
6k
), 4MHz, Synchronous Step-Down DC/DC Converter
), 4MHz, Synchronous Step-Down DC/DC Converter
), 1.5MHz, Synchronous Step-Down DC/DC Converter
), 4MHz, Synchronous Step-Down DC/DC Converter with
), 4MHz, Synchronous Step-Down DC/DC Converter
), 1MHz, Synchronous Step-Down DC/DC Converter
), 1MHz, Synchronous Step-Down DC/DC Converter
C
Sink/Source), 2MHz, Monolithic Synchronous Regulator for
), 3MHz, Synchronous Step-Down DC/DC Converter
R3
100k
R8
365k
C
10pF
C1
RUN
TRACK/SS
RT/SYNC
PGOOD
ITH
MODE
SV
IN
●
LTC3612
www.linear.com
PV
PV
V
IN_DRV
SGND
PGND
FB
IN
DDR
R2
200k
SW
1μH
L1
22pF
200k
R1
C3
DD
, 1MHz
3612 TA04a
C4
100μF
C5
47μF
V
0.9V
±1.5A
TT
COMMENTS
95% Effi ciency, V
I
95% Effi ciency, V
I
92% Effi ciency, V
I
95% Effi ciency, V
I
95% Effi ciency, V
I
95% Effi ciency, V
I
95% Effi ciency, V
I
90% Effi ciency, V
I
95% Effi ciency, V
I
95% Effi ciency, V
I
95% Effi ciency, V
I
95% Effi ciency, V
I
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
= 2mA, I
= 75μA, I
= 75μA, I
= 900μA, I
= 900μA, I
= 900μA, I
= 60μA, I
= 280μA, I
= 64μA, I
= 450μA, I
= 64μA, I
= 380μA, I
500mV/DIV
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
SD
< 15μA, 4mm × 4mm QFN24
< 1μA, TSSOP16E, 4mm × 4mm QFN20
< 1μA, 4mm × 4mm QFN16
< 1μA, TSSOP16E, 4mm × 4mm QFN16
< 1μA, TSSOP20E
< 1μA, TSSOP20E
< 15μA, 5mm × 7mm QFN52
< 15μA, 9mm × 9mm QFN64
< 15μA, 9mm × 9mm QFN64
< 1μA, TSSOP16E
< 1μA, 5mm × 7mm QFN38
< 1μA, 5mm × 7mm QFN38
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
: 4V to 15V, V
: 4.5V to 10V, V
: 4.5V to 15V, V
: 4V to 18V, V
: 4V to 24V, V
: 4V to 32V, V
: 2.25V to 5.5V, V
: 2.25V to 5.5V, V
: 2.25V to 5.5V, V
: 2.5V to 5.5V, V
: 2.25V to 5.5V, V
: 2.25V to 5.5V, V
© LINEAR TECHNOLOGY CORPORATION 2009
Ratiometric Start-Up
500μs/DIV
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
OUT(MIN)
LT 0709 • PRINTED IN USA
= 0.6V,
= 0.6V,
= 0.6V,
= 0.6V,
= 0.6V,
= 0.6V,
= 0.6V,
V
V
DD
= 0.8V,
= V
= 0.8V,
= 0.8V,
= 0.8V,
TT
REF
3612 TA04b
/2,
3612f