900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LTC3769 Datasheet

60V Low IQ Synchronous Boost Controller

No Preview Available !

FEATURES
n Synchronous Operation for Highest Efficiency and
Reduced Heat Dissipation
n Wide VIN Range: 4.5V to 60V (65V Abs Max);
Operates Down to 2.3V After Start-Up
n Output Voltage Up to 60V
n ±1% 1.200V Reference Voltage
n RSENSE or Inductor DCR Current Sensing
n 100% Duty Cycle Capability for Synchronous MOSFET
n Low Quiescent Current: 28μA
n Phase-Lockable Frequency (75kHz to 850kHz)
n Programmable Fixed Frequency (50kHz to 900kHz)
n Power Good Output Voltage Monitor
n Low Shutdown Current: 4µA
n Internal LDO Powers Gate Drive from VBIAS or EXTVCC
n Thermally Enhanced Low Profile 24-Pin 4mm × 4mm
QFN Package and 20-Lead TSSOP Package
APPLICATIONS
n Industrial
n Automotive
n Medical
n Military
LTC3769
60V Low IQ Synchronous
Boost Controller
DESCRIPTION
The LTC®3769 is a high performance single output syn-
chronous boost converter controller that drives an all
N-channel power MOSFET stage. Synchronous rectifica-
tion increases efficiency, reduces power losses and eases
thermal requirements, simplifying high power boost ap-
plications. The 28µA no-load quiescent current extends
operating run time in battery-powered systems.
A 4.5V to 60V input supply range encompasses a wide
range of system architectures and battery chemistries.
When biased from the output of the boost converter or
another auxiliary supply, the LTC3769 can operate from an
input supply as low as 2.3V after start-up. The operating
frequency can be set within a 50kHz to 900kHz range or
synchronized to an external clock using the internal PLL.
The SS pin ramps the output voltage during start-up. The
PLLIN/MODE pin selects Burst Mode® operation, pulse-
skipping mode or forced continuous mode at light loads.
L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, 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 5408150, 5481178, 5705919,
5929620, 6177787, 6498466, 6580258, 6611131.
TYPICAL APPLICATION
120W, 12V to 24V/5A Synchronous Boost Converter
VIN
4.5V TO 60V
DOWN TO 2.3V
AFTER START-UP IF
VBIAS IS POWERED
FROM VOUT
22µF
10nF
15nF 8.66K
100pF
4mΩ
3.3µH
VBIAS
RUN
SENSE+
SS
SENSE
LTC3769 BG
ITH
PLLIN/MODE
FREQ
OVMODE
TG
SW
BOOST
ILIM
INTVCC
PGOOD
GND
VFB
EXTVCC
3769 TA01a
0.1µF
4.7µF
220µF
VOUT
24V/5A
VOUT FOLLOWS VIN FOR VIN > 24V
232k
12.1k
For more information www.linear.com/LTC3769
Efficiency and Power Loss
vs Output Current
100
10
90
EFFICIENCY
1
80
70
POWER
0.1
LOSS
60
0.01
50
40
0.0001
0.001
0.001 0.01 0.1
1
10
OUTPUT CURRENT (A)
3769 TA01b
3769fa
1


Linear Technology Electronic Components Datasheet

LTC3769 Datasheet

60V Low IQ Synchronous Boost Controller

No Preview Available !

LTC3769
ABSOLUTE MAXIMUM RATINGS (Notes 1, 3)
VBIAS......................................................... –0.3V to 65V
BOOST.........................................................–0.3V to 71V
SW................................................................. –5V to 65V
RUN.............................................................. –0.3V to 8V
Maximum Current Sourced into Pin
From Source >8V...............................................100µA
PGOOD, PLLIN/MODE .................................. –0.3V to 6V
INTVCC, (BOOST - SW)...................................–0.3V to 6V
EXTVCC....................................................... –0.3V to 14V
SENSE+, SENSE......................................... –0.3V to 65V
(SENSE+ - SENSE).............................................–0.3V to 0.3V
ILIM, SS, ITH, FREQ, PHASMD, VFB...... –0.3V to INTVCC
Operating Junction Temperature
Range (Note 2).........................................–55°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) SSOP......... 300°C
PIN CONFIGURATION
TOP VIEW
ILIM 1
20 PGOOD
INTVCC 2
19 VBIAS
FREQ 3
GND 4
PLLIN/MODE 5
RUN 6
18 EXTVCC
17 INTVCC
21
16 BG
GND
15 BOOST
SS 7
SENSE8
SENSE+ 9
14 TG
13 SW
12 OVMODE
VFB 10
11 ITH
FE PACKAGE
20-LEAD PLASTIC TSSOP
TJMAX = 150°C, θJA = 38°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
24 23 22 21 20 19
VBIAS 1
PGOOD 2
ILIM 3
NC 4
INTVCC 5
NC 6
18 SW
17 OVMODE
25
16 ITH
GND
15 VFB
14 SENSE+
13 SENSE
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
TJMAX = 150°C, θJA = 47°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3769EUF#PBF
LTC3769EUF#TRPBF
3769
24-Lead (4mm × 4mm) Plastic QFN
–40°C to 125°C
LTC3769IUF#PBF
LTC3769IUF#TRPBF
3769
24-Lead (4mm × 4mm) Plastic QFN
–40°C to 125°C
LTC3769HUF#PBF
LTC3769HUF#TRPBF
3769
24-Lead (4mm × 4mm) Plastic QFN
–40°C to 150°C
LTC3769MPUF#PBF
LTC3769MPUF#TRPBF 3769
24-Lead (4mm × 4mm) Plastic QFN
–55°C to 150°C
LTC3769EFE#PBF
LTC3769EFE#TRPBF
LTC3769FE
20-Lead Plastic SSOP
–40°C to 125°C
LTC3769IFE#PBF
LTC3769IFE#TRPBF
LTC3769FE
20-Lead Plastic SSOP
–40°C to 125°C
LTC3769HFE#PBF
LTC3769HFE#TRPBF
LTC3769FE
20-Lead Plastic SSOP
–40°C to 150°C
LTC3769MPFE#PBF
LTC3769MPFE#TRPBF LTC3769FE
20-Lead Plastic SSOP
–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.
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/
3769fa
2
For more information www.linear.com/LTC3769


Part Number LTC3769
Description 60V Low IQ Synchronous Boost Controller
Maker Linear Technology
Total Page 3 Pages
PDF Download

LTC3769 Datasheet PDF

View PDF for Mobile






Similar Datasheet

1 LTC3765 Active Clamp Forward Controller and Gate Driver
Linear Technology Corporation
2 LTC3766 Secondary-Side Synchronous Forward Controller
Linear Technology
3 LTC3769 60V Low IQ Synchronous Boost Controller
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