900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LTC3612 Datasheet

4MHz Monolithic Synchronous Step-Down DC/DC Converter

No Preview Available !

FEATURES
n 3A Output Current
n 2.25V to 5.5V Input Voltage Range
n Low Output Ripple Burst Mode® Operation: IQ = 70µA
n ±1% Output Voltage Accuracy
n Output Voltage Down to 0.6V
n High Efficiency: Up to 95%
n Low Dropout Operation: 100% Duty Cycle
n Shutdown Current: ≤1µA
n Adjustable Switching Frequency: Up to 4MHz
n Optional Active Voltage Positioning (AVP) with
Internal Compensation
n Selectable Pulse-Skipping/Forced Continuous/
Burst Mode Operation with Adjustable Burst Clamp
n Programmable Soft-Start
n Inputs for Start-Up Tracking or External Reference
n DDR Memory Mode, IOUT = ±1.5A
n Available in Thermally Enhanced 20-Pin
(3mm × 4mm) QFN and TSSOP Packages
APPLICATIONS
n Point-of-Load Supplies
n Distributed Power Supplies
n Portable Computer Systems
n DDR Memory Termination
n Handheld Devices
LTC3612
3A, 4MHz Monolithic
Synchronous Step-Down
DC/DC Converter
DESCRIPTION
The LTC®3612 is a low quiescent current monolithic syn-
chronous buck regulator using a current mode, constant
frequency architecture. The no-load DC supply current
in sleep mode is only 70µA while maintaining the output
voltage (Burst Mode operation) at no load, dropping to
zero current in shutdown. The 2.25V to 5.5V input supply
voltage range makes the LTC3612 ideally suited for single
Li-Ion as well as fixed low voltage input applications. 100%
duty cycle capability provides low dropout operation,
extending the operating time in battery-powered systems.
The operating frequency is externally programmable up to
4MHz, allowing the use of small surface mount inductors.
For switching noise-sensitive applications, the LTC3612
can be synchronized to an external clock at up to 4MHz.
Forced continuous mode operation in the LTC3612 reduces
noise and RF interference. Adjustable compensation allows
the transient response to be optimized over a wide range
of loads and output capacitors.
The internal synchronous switch increases efficiency and
eliminates the need for an external catch diode, saving
external components and board space. The LTC3612 is
offered in a leadless 20-pin 3mm × 4mm QFN or a thermally
enhanced 20-pin TSSOP package.
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners. Protected by U.S. Patents, including 6580258, 5481178, 5994885, 6304066, 6498466,
6611131.
TYPICAL APPLICATION
VIN
2.5V TO 5.5V
SVIN
RUN
TRACK/SS
PVIN
PVIN_DRV
DDR
RT/SYNC
LTC3612 SW
PGOOD
SGND
ITH PGND
MODE
VFB
210k
22µF
×2
560nH
47µF
VOUT
2.5V
3A
665k
3612 TA01a
Efficiency and Power Loss vs Load Current
100 10
90
80 1
70
60 0.1
50
40 0.01
30
20
10
0
1
VIN = 5V
VIN = 3.3V
VIN = 2.8V
0.001
10 100 1000 10000
OUTPUT CURRENT (mA) 3612 TA01b
For more information www.linear.com/LTC3612
3612fb
1
Free Datasheet http://www.nDatasheet.com


Linear Technology Electronic Components Datasheet

LTC3612 Datasheet

4MHz Monolithic Synchronous Step-Down DC/DC Converter

No Preview Available !

LTC3612
ABSOLUTE MAXIMUM RATINGS (Note 1)
PVIN, SVIN, PVIN_DRV Voltages...................... –0.3V to 6V
SW Voltage...................................–0.3V to (PVIN + 0.3V)
ITH, RT/SYNC Voltages................ –0.3V to (SVIN + 0.3V)
DDR, TRACK/SS Voltages............ –0.3V to (SVIN + 0.3V)
MODE, RUN, VFB Voltages........... –0.3V to (SVIN + 0.3V)
PGOOD Voltage............................................. –0.3V to 6V
Operating Junction Temperature Range
(Notes 2, 11)........................................... –55°C to 150°C
Storage Temperature............................... –65°C to 150°C
Reflow Peak Body Temperature (QFN)................... 260°C
Lead Temperature (Soldering, 10 sec)
TSSOP............................................................... 300°C
PIN CONFIGURATION
TOP VIEW
DDR 1
RT/SYNC 2
SGND 3
NC 4
SW 5
SW 6
20 19 18 17
16 PGOOD
15 RUN
21
14 SVIN
13 PVIN_DRV
12 SW
11 SW
7 8 9 10
UDC PACKAGE
20-LEAD (3mm × 4mm) PLASTIC QFN
TJMAX = 150°C, θJA = 43°C/W
EXPOSED PAD (PIN 21) IS PGND, MUST BE SOLDERED TO PCB
SVIN 1
RUN 2
PGOOD 3
MODE 4
VFB 5
ITH 6
TRACK/SS 7
DDR 8
RT/SYNC 9
SGND 10
TOP VIEW
21
20 PVIN_DRV
19 SW
18 NC
17 SW
16 PVIN
15 PVIN
14 SW
13 NC
12 SW
11 NC
FE PACKAGE
20-LEAD PLASTIC TSSOP
TJMAX = 150°C, θJA = 38°C/W
EXPOSED PAD (PIN 21) IS PGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3612EUDC#PBF
LTC3612IUDC#PBF
LTC3612EUDC#TRPBF
LTC3612IUDC#TRPBF
LDQT
LDQT
20-Lead (3mm × 4mm) Plastic QFN
20-Lead (3mm × 4mm) Plastic QFN
–40°C to 125°C
–40°C to 125°C
LTC3612HUDC#PBF
LTC3612HUDC#TRPBF LDQT
20-Lead (3mm × 4mm) Plastic QFN –40°C to 150°C
LTC3612MPUDC#PBF
LTC3612MPUDC#TRPBF LDQT
20-Lead (3mm × 4mm) Plastic QFN –55°C to 150°C
LTC3612EFE#PBF
LTC3612EFE#TRPBF
LTC3612FE
20-Lead Plastic TSSOP
–40°C to 125°C
LTC3612IFE#PBF
LTC3612IFE#TRPBF
LTC3612FE
20-Lead Plastic TSSOP
–40°C to 125°C
LTC3612HFE#PBF
LTC3612HFE#TRPBF
LTC3612FE
20-Lead Plastic TSSOP
–40°C to 150°C
LTC3612MPFE#PBF
LTC3612MPFE#TRPBF LTC3612FE
20-Lead Plastic TSSOP
–55°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.
Consult LTC Marketing for information on non-standard lead based finish parts.
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/
2
For more information www.linear.com/LTC3612
3612fb
Free Datasheet http://www.nDatasheet.com


Part Number LTC3612
Description 4MHz Monolithic Synchronous Step-Down DC/DC Converter
Maker Linear
Total Page 30 Pages
PDF Download

LTC3612 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 LTC3610 12A Monolithic Synchronous Step-Down DC/DC Converter
Linear Technology
2 LTC3611 32V Monolithic Synchronous Step-Down DC/DC Converter
Linear Technology
3 LTC3612 4MHz Monolithic Synchronous Step-Down DC/DC Converter
Linear
4 LTC3613 15A Monolithic Step Down Regulator
Linear Technology
5 LTC3614 (LTC3000 Series) SEVEN-SEGMENT NUMERIC LED DISPLAY
LITE-ON Electronics
6 LTC3614 4MHz Monolithic Synchronous Step-Down DC/DC Converter
Linear
7 LTC3615 3A Synchronous Step-Down DC/DC Converter
Linear Technology
8 LTC3615-1 3A Synchronous Step-Down DC/DC Converter
Linear
9 LTC3616 6A 4MHz Monolithic Synchronous Step-Down DC/DC Converter
Linear Technology





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