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LTC3824MPMSE#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC3824
1
3824fh
For more information www.linear.com/LTC3824
Typical applicaTion
FeaTures
applicaTions
DescripTion
High Voltage Step-Down
Controller With 40µA
Quiescent Current
The LT C
®
3824 is a step-down DC/DC controller designed
to drive an external P-channel MOSFET. With a wide input
range of 4V to 60V and a high voltage gate driver, the
LTC3824 is suitable for many industrial and automotive
high power applications. Constant frequency current mode
operation provides excellent performance.
The LTC3824 can be configured for Burst Mode operation.
Burst Mode operation enhances low current efficiency
(only 40µA quiescent current) and extends battery run
time. The switching frequency can be programmed up to
600kHz and is easily synchronizable.
Other features include current limit, soft-start, micropower
shutdown, and Burst Mode disable.
The LTC3824 is available in a 10-lead MSE power package.
5V/2A Buck Converter
n
Wide Input Range: 4V to 60V
n
Current Mode Constant Frequency PWM
n
Very Low Dropout Operation: 100% Duty Cycle
n
Programmable Switching Frequency:
200kHz to 600kHz
n
Selectable High Efficient Burst Mode
®
Operation:
40µA Quiescent Current
n
Easy Synchronization
n
8V, 2A Gate Drive (V
CC
> 10V) for Industrial High
Voltage P-Channel MOSFET
n
Programmable Soft-Start
n
Programmable Current Limit
n
Available in a Small 10-Pin Thermally Enhanced
MSE Package
n
Industrial and Automotive Power Supplies
n
Telecom Power Supplies
n
Distributed Power Systems
L, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents
including 5731964.
Efficiency and Power Loss vs Load Current
3824 TA01
10k
80.6k
R
S
0.025Ω
51Ω
C
CAP
0.1µF
422k
100pF
C
OUT
100µF
×2
22µH
V
OUT
5V
2A
0.1µF
392k
C
IN
33µF
100V
3.3nF
LTC3824
SENSE
GATE
CAP
V
FB
V
C
V
CC
R
SET
GND
SS
SYNC/MODE
V
IN
5.5V TO 60V
+
LOAD CURRENT (mA)
60
70
EFFICIENCY (%)
POWER LOSS (W)
90
80
10 100
3824 TA01a
50
100
0.5
1.0
2.0
1.5
0
2.5
EFFICIENCY
POWER LOSS
20001000
V
IN
= 12V
V
IN
= 40V
V
IN
= 40V
V
IN
= 12V
LTC3824
2
3824fh
For more information www.linear.com/LTC3824
pin conFiguraTionabsoluTe MaxiMuM raTings
V
CC
........................................................................... 65V
SS, R
SET
, V
FB
.............................................................4V
V
C
...............................................................................3V
SYNC/MODE ...............................................................6V
V
CC
– V
SENSE
..............................................................1V
Operating Junction Temperature Range
(Note 2) .................................................. –55°C to 150°C
Storage Temperature Range ..................... –65° to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
1
2
3
4
5
GND
SYNC/MODE
R
SET
V
C
V
FB
10
9
8
7
6
11
GND
CAP
GATE
V
CC
SENSE
SS
TOP VIEW
MSE PACKAGE
10-LEAD PLASTIC MSOP
T
JMAX
= 150°C, θ
JA
= 43°C/W, θ
JC
= 3°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3824EMSE#PBF LTC3824EMSE#TRPBF LTBRZ 10-Lead Plastic MSOP –40°C to 125°C
LTC3824IMSE#PBF LTC3824IMSE#TRPBF LTCGZ 10-Lead Plastic MSOP –40°C to 125°C
LTC3824HMSE#PBF LTC3824HMSE#TRPBF LTCGZ 10-Lead Plastic MSOP –40°C to 150°C
LTC3824MPMSE#PBF LTC3824MPMSE#TRPBF LTCGZ 10-Lead Plastic MSOP –55°C to 150°C
LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3824EMSE LTC3824EMSE#TR LTBRZ 10-Lead Plastic MSOP –40°C to 125°C
LTC3824IMSE LTC3824IMSE#TR LTCGZ 10-Lead Plastic MSOP –40°C to 125°C
LTC3824HMSE LTC3824HMSE#TR LTCGZ 10-Lead Plastic MSOP –40°C to 150°C
LTC3824MPMSE LTC3824MPMSE#TR LTCGZ 10-Lead Plastic MSOP –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/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
LTC3824
3
3824fh
For more information www.linear.com/LTC3824
elecTrical characTerisTics
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
CC
= 12V, R
SET
= 392k, C
CAP
= 0.1µF. No load on any
outputs, unless otherwise specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Voltage (V
CC
)
l
4 60 V
Supply Current (I
VCC
) V
C
≤ 0.4V (Switching Off), V
CC
≤ 60V
V
SYNC
= 0V (Burst Mode Operation Disable)
0.8 1.3 mA
Supply Current (I
VCC
) Burst Mode Operation V
CC
≤ 60V, SYNC/MODE Open, V
C
= 0.6V 40 65 µA
Supply Current in Shutdown V
C
≤ 25mV, V
CC
≤ 60V
l
9 20
30
µA
µA
V
C
≤ 25mV, V
CC
= 12V
l
5 10
15
µA
µA
Voltage Amplifier gm
Reference V
oltage (V
REF
)
LTC3824E/LTC3824I
LTC3824MP/LTC3824H
l
l
0.792
0.788
0.788
0.8 0.808
0.812
0.816
V
V
V
Transconductance V
C
= 0.8V, ∆I
VC
= ±2µA 220 260 370 µmho
FB Input Current V
FB
= V
REF
(Note 3): LTC3824E/LTC3824I
LTC3824MP/LTC3824H
l
l
10
10
30
60
nA
nA
V
C
High I
VC
= 0 1.6 V
V
C
Low I
VC
= 0 0.35 0.5 V
V
C
Source Current V
VC
= 0.5V to 1.3V, V
FB
= V
REF
–100mV (V
SYNC
= 0V) 15 µA
V
C
Sink Current V
VC
= 0.7V to 1.3V, V
FB
= V
REF
+100mV (V
SYNC
= 0V) 15 µA
V
C
Threshold for Switching Off V
SYNC/MODE
= 0V (Note 4)
l
0.4 V
Soft-Start Current I
SS
V
SS
= 0.1V to 1.5V
l
3
2.5
5 7.5
8
µA
µA
V
C
Burst Mode Threshold V
CC
≤ 60V, V
C
Rising, SYNC/MODE Open 0.84 V
V
C
Burst Mode Threshold Hysteresis V
CC
≤ 60V 0.04 V
SENSE Voltage at Burst Mode Operation (V
CC
–V
SENSE
) at 30% Duty Cycle
70% Duty Cycle
30
20
mV
mV
Current Limit Threshold (V
CC
–V
SENSE
) V
CC
≤ 60V: LTC3824E/LTC3824I
LTC3824MP/LTC3824H
l
l
80
75
100
100
120
120
mV
mV
FB Overvoltage Threshold V
C
= 1.6V 8 %
Sense Input Current V
SENSE
= V
CC
0.1 2 µA
Oscillator
Switching Frequency R
SET
= 392k: LTC3824E/LTC3824I
LTC3824MP/LTC3824H
l
l
170
170
200
200
230
240
kHz
kHz
R
SET
= 200k
l
320 400 460 kHz
Synchronization Pulse Threshold
on SYNC Pin
Rising Edge V
SYNC
1.3 V
Synchronization Frequency Range R
SET
= 392k
R
SET
= 200k
l
l
230
460
300
600
kHz
kHz
V
RSET
R
SET
= 392k 1.2 V
Minimum On-Time (Measured at GATE Pin) CCM Operation (Note 5) 350 ns
Switching Frequency Foldback V
FB
= 0.3V
l
35 50 75 kHz
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LTC3824MPMSE#TRPBF

Mfr. #:
Buy LTC3824MPMSE#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators High Voltage Step-Down Controller With 40uA Quiescent Current
Lifecycle:
New from this manufacturer.
Delivery:
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