LT1339 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT1339' PDF : 20 Pages View PDF
LT1339
TYPICAL APPLICATION
48V to 5V 50A DC/DC Converter with Input Supply Start-Up Protection
LT1339
SYNC VBOOST
RCT
10k
5VREF
TG
TS
C5VREF
1µF
CCT
2200pF
CT
SL/ADJ
CAVG, 2200pF IAVG
CSS, 10µF
SS
12VIN
BG
CVC, 2200pF RVC, 4.7k
CREF
0.1µF
RFB2
1k
RFB1
3k
VC
PGND
SGND PHASE
RUN/SHDN
VFB
VREF SENSE–
SENSE+
12V 50mA
DBST
IN5819
C12VIN
47µF
CBST
1µF
RR3
51k
VIN
48V
CIN
Q1 1500µF
63V, × 6
Q2
Q3
Q4
RR1 RR2
22k 1.2k
D3
MMSZ4684
CBG, 1µF
D2
MBR0520
RBG
10k
D4
IN914
IRFZ44
×2
D1
IRFZ44
×4
L1
40µH
D1 = IR30BQ060 × 8
Q1, Q3 = FMMT619; Q2, Q4 = FMMT720
L1 = Kool Mµ®, 12T 4X12 ON 77439-A7
Kool Mµ IS A REGISTERED TRADEMARK OF MAGNETICS, INC.
RS
0.002Ω
COUT
2200µF
6.3V, × 4
VOUT
5V AT 50A
1339 TA01
100
95
90
85
80
75
70
65
60
55
50
0
48V to 5V Efficiency
10
20
30
40
50
OUTPUT CURRENT (AMPS)
LT1339 • TA02
RELATED PARTS
PART NUMBER
LT1158
LT1160
LT1162
LT1336
LTC ®1530
LTC1435A
LTC1438
LT1680
DESCRIPTION
Half-Bridge N-Channel MOSFET Driver
Half-Bridge N-Channel MOSFET Driver
Dual Half-Bridge N-Channel MOSFET Driver
Half-Bridge N-Channel MOSFET Driver
High Power Step-Down Switching Regulator Controller
High Efficiency, Low Noise Current Mode Step-Down DC/DC Converter
Dual High Efficiency, Low Noise Synchronous Step-Down Controller
High Power DC/DC Current Mode Step-Up Controller
COMMENTS
Current Limit Protection, 100% of Duty Cycle
Up to 60V Input Supply, No Shoot-Through
VIN to 60V, Good for Full-Bridge Applications
Smooth Operation at High Duty Cycle (95% to 100%)
Excellent for 5V to 3.xV Up to 50A
Drives Synchronous N-Channel MOSFETs
Tight 1% Reference
High Side Current Sense, Up to 60V Input
20 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
1339fa LT/TP 0299 2K REV A • PRINTED IN THE USA
© LINEAR TECHNOLOGY CORPORATION 1997
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