28
LTC1629-6
16296f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 1999
LT/TP 1201 2K • PRINTED IN USA
TYPICAL APPLICATIO
U
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC1435/LTC1435A High Efficiency Synchronous Step-Down Switching Regulator Burst Mode
®
Operation, 16-Pin Narrow SO
LTC1436A-PLL High Efficiency Low Noise Synchronous Step-Down Switching Regulator Adaptive Power
TM
Mode, 24-Pin SSOP
LTC1438/LTC1439 Dual High Efficiency Low Noise Synchronous Step-Down Switching Regulators POR, Auxiliary Regulator
LTC1438-ADJ Dual Synchronous Controller with Auxiliary Regulator POR, External Feedback Divider
LTC1538-AUX Dual High Efficiency Low Noise Synchronous Step-Down Switching Regulator Auxiliary Regulator, 5V Standby
LTC1539 Dual High Efficiency Low Noise Synchronous Step-Down Switching Regulator 5V Standby, POR, Low-Battery,
Aux Regulator
LTC1530 High Power Step-Down Switching Regulator Controller High Efficiency 5V to 3.3V Conversion
at Up to 15A
LTC1628/LTC1628-PG Dual High Efficiency, PolyPhase Synchronous Step-Down Switching Regulator Constant Frequency, Standby,
5V and 3.3V LDOs, PGOOD
LTC1702/LTC1703 Dual High Efficiency, PolyPhase Synchronous Step-Down Switching Regulator 500kHz, 25MHz GBW, Voltage Mode
LTC1708-PG Dual High Efficiency, PolyPhase Synchronous Step-Down Switching Regulator Constant Frequency, 5-Bit VID,
Standby 5V, 3.3V, PGOOD
LTC1709 Family High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator Current Mode Ensures
with 5-Bit VID (Various Code Tables Available) Accurate Current Sharing, 3.5V ≤ V
IN
≤ 36V
LTC1735 High Efficiency Synchronous Step-Down Controller Burst Mode Operation, 16-Pin Narrow SSOP,
Fault Protection, 3.5V ≤ V
IN
≤ 36V
LTC1736 High Efficiency Synchronous Step-Down Controller with 5-Bit VID Output Fault Protection, Power Good,
24-Pin SSOP, 3.5V ≤ V
IN
≤ 36V
LTC1929 High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator Low Cost, 2-Phase Current Mode
Adaptive Power and Burst Mode are trademarks of Linear Technology Corporation.
V
IN
: 5V TO 16V
V
OUT
: 3.3V/30A
SWITCHING FREQUENCY = 250kHz
MI, M3: FDS7764
M2, M4: FDS7764 ×2
L1, L2: 1µH SUMIDA CEP125-1R0MC
C
IN
: OS CON 2-16SP270M
C
OUT
: POS CAP THREE 4TPB470M
D3, D4: CENTRAL CMDSH-3TR
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CLKOUT
TG1
SW1
BOOST1
V
IN
BG1
EXTV
CC
INTV
CC
INTV
CC
PGND
BG2
BOOST2
SW2
TG2
PGOOD
RUN/SS
SENSE1
+
SENSE1
–
EAIN
PLLFLTR
PLLIN
PHASMD
I
TH
SGND
V
DIFFOUT
V
OS
–
V
OS
+
SENSE2
–
SENSE2
+
LTC1629-6
M4M3
0.1µF 17.8k
6.04k
1%
10k
3.3k
27.4k
1%
1000pF
1000pF
1000pF
100pF
100pF
M2M1
D1
UPS840
D2
UPS840
0.47µF
POWER
GOOD
100k
4.7µF
6.3V
+
0.1µF
1µF,25V
5V
D4
D3
10Ω
0.47µF
V
OUT
3.3V/30A
V
IN
5V TO
16V
+
L1
L2
1629 TA02
1000pF
C
OUT
+
C
IN
0.003Ω
0.003Ω
Figure 12. 3.3V/30A Power Supply with Active Voltage Positioning
