900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LTC3646HDE Datasheet

1A Synchronous Step-Down Converter

No Preview Available !

FEATURES
nn Wide Input Voltage Range: 4.0V to 40V
nn 1A Guaranteed Output Current
nn High Efficiency: Up to 95%
nn Wide Output Voltage Range
nn LTC3646: 2.0V to 30V
nn LTC3646-1: 0.6V to 15V
nn ±1% Accurate Reference Voltage
nn Internal or External Compensation
nn Switching Frequency Adjustable and Synchronizable:
200kHz to 3MHz
nn Selectable High Efficiency Burst Mode® Operation or
Forced Continuous Mode
nn 14 Lead 3mm × 4mm DFN or Thermally Enhanced
16-Lead MSOP Packages
APPLICATIONS
nn Point of Load Power Supplies
nn Intermediate Bus Power
nn Automotive Applications
LTC3646/LTC3646-1
40V, 1A Synchronous
Step-Down Converter
DESCRIPTION
The LTC®3646 is a high efficiency, step-down DC/DC
converter with internal high side and synchronous power
FETs. It draws only 140µA typical DC supply current in
Burst Mode operation at no load while maintaining output
voltage regulation.
The LTC3646 can supply up to a 1A load, and its combina-
tion of Burst Mode operation, integrated power switches
and low quiescent current provides high efficiency over a
broad range of load currents. Alternatively, it can be used
in forced continuous mode for ripple sensitive applications.
The LTC3646 has a wide 4.0V to 40V input range and its
patented controlled on-time architecture and 0.6V refer-
ence voltage allow for large step-down ratios without
the risk of output overvoltage. The frequency may be set
between 200kHz and 3.0MHz with a program resistor or
synchronized to an external clock.
The internal soft-start, short-circuit protection and volt-
age rating make the LTC3646 a robust part ideal for high
voltage applications.
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 6580258, 5481178,
5994885, 6304066, 5847554, 6476589, 6774611.
TYPICAL APPLICATION
VIN
40V MAX
10µF
4.7µF
PVIN
BOOST
SVIN
RUN
LTC3646
INTVCC
SW
MODE/SYNC
ITH
RT
SWITCH VON
EXTVCC CONTROL
+–
0.6V
VFB
SGND
PGND
0.1µF
3.3µH
VOUT
5V
1A
412k
15µF
56.2k
3646 TA01a
Efficiency Curve
100 VIN = 12V
90 f = 1MHz
80
VOUT = 5V
1.0
VOUT = 3.3V 0.8
70
60
0.6
50
40
0.4
30
VOUT = 5V
20
VOUT = 3.3V
0.2
10
0
0
0.001
0.01
0.1
1
LOAD CURRENT (A)
3646 TA01b
For more information www.linear.com/LTC3646
36461fc
1


Linear Technology Electronic Components Datasheet

LTC3646HDE Datasheet

1A Synchronous Step-Down Converter

No Preview Available !

LTC3646/LTC3646-1
ABSOLUTE MAXIMUM RATINGS (Notes 1, 7)
PVIN, SVIN Supply Voltage......................... –0.3V to 45V
SW Voltage (DC)............................ –0.3V to PVIN + 0.3V
BOOST – SW Voltage.................................... –0.3V to 6V
VON Voltage................................................. –0.3V to 33V
MODE/SYNC, RT, ITH,
VFB Voltage.................................–0.3V to INTVCC + 0.3V
INTVCC Voltage............................................. –0.3V to 6V
EXTVCC Voltage............................................ –0.3V to 6V
RUN Voltage............................................... –0.3V to 45V
PGOOD........................................–0.3V to INTVCC + 0.3V
Operating Junction Temperature Range
(Notes 2, 7)............................................. –40°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) MSE........... 300°C
PIN CONFIGURATION
TOP VIEW
SGND 1
VFB 2
ITH 3
RT 4
VON 5
PGOOD 6
MODE/SYNC 7
15
PGND
14 SVIN
13 RUN
12 EXTVCC
11 INTVCC
10 BOOST
9 SW
8 PVIN
DE PACKAGE
14-LEAD (4mm × 3mm) PLASTIC DFN
TJMAX = 150°C, θJA = 43°C/W
EXPOSED PAD (PIN 15) IS PGND, MUST BE SOLDERED TO PCB
SGND 1
VFB 2
ITH 3
RT 4
VON 5
PGOOD 6
MODE/SYNC 7
NC 8
TOP VIEW
17
PGND
16 SVIN
15 RUN
14 EXTVCC
13 INTVCC
12 BOOST
11 SW
10 PVIN
9 PVIN
MSE PACKAGE
16-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 38°C/W
EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3646EDE#PBF
LTC3646EDE#TRPBF
3646
14-Lead (4mm × 3mm) Plastic DFN
–40°C to 85°C
LTC3646IDE#PBF
LTC3646IDE#TRPBF
3646
14-Lead (4mm × 3mm) Plastic DFN
–40°C to 125°C
LTC3646HDE#PBF
LTC3646HDE#TRPBF 3646
14-Lead (4mm × 3mm) Plastic DFN
–40°C to 150°C
LTC3646EMSE#PBF
LTC3646EMSE#TRPBF 3646
16-Lead Plastic MSOP
–40°C to 85°C
LTC3646IMSE#PBF
LTC3646IMSE#TRPBF 3646
16-Lead Plastic MSOP
–40°C to 125°C
LTC3646HMSE#PBF
LTC3646HMSE#TRPBF 3646
16-Lead Plastic MSOP
–40°C to 150°C
LTC3646EDE-1#PBF
LTC3646EDE-1#TRPBF 36461
14-Lead (4mm × 3mm) Plastic DFN
–40°C to 85°C
LTC3646IDE-1#PBF
LTC3646IDE-1#TRPBF 36461
14-Lead (4mm × 3mm) Plastic DFN
–40°C to 125°C
LTC3646HDE-1#PBF
LTC3646HDE-1#TRPBF 36461
14-Lead (4mm × 3mm) Plastic DFN
–40°C to 150°C
LTC3646EMSE-1#PBF LTC3646EMSE-1#TRPBF 36461
16-Lead Plastic MSOP
–40°C to 85°C
LTC3646IMSE-1#PBF
LTC3646IMSE-1#TRPBF 36461
16-Lead Plastic MSOP
–40°C to 125°C
LTC3646HMSE-1#PBF LTC3646HMSE-1#TRPBF 36461
16-Lead Plastic MSOP
–40°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
36461fc
2
For more information www.linear.com/LTC3646


Part Number LTC3646HDE
Description 1A Synchronous Step-Down Converter
Maker Linear
PDF Download

LTC3646HDE Datasheet PDF






Similar Datasheet

1 LTC3646HDE 1A Synchronous Step-Down Converter
Linear
2 LTC3646HDE-1 1A Synchronous Step-Down Converter
Linear





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy