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Linear Technology Electronic Components Datasheet

LTC3630 Datasheet

65V 500mA Synchronous Step-Down Converter

No Preview Available !

Features
n Wide Operating Input Voltage Range: 4V to 65V
n Synchronous Operation for Highest Efficiency
n Internal High Side and Low Side Power MOSFETs
n No Compensation Required
n Adjustable 50mA to 500mA Maximum Output Current
n Low Dropout Operation: 100% Duty Cycle
n Low Quiescent Current: 12µA
n Wide Output Range: 0.8V to VIN
n 0.8V ±1% Feedback Voltage Reference
n Precise RUN Pin Threshold
n Internal and External Soft-Start
n Programmable 1.8V, 3.3V, 5V or Adjustable Output
n Few External Components Required
n Low Profile (0.75mm) 3mm × 5mm DFN and
Thermally-Enhanced MSE16 Packages
Applications
n Industrial Control Supplies
n Medical Devices
n Distributed Power Systems
n Portable Instruments
n Battery-Operated Devices
n Automotive
n Avionics
LTC3630
High Efficiency, 65V
500mA Synchronous
Step-Down Converter
Description
The LTC®3630 is a high efficiency step-down DC/DC
converter with internal high side and synchronous power
switches that draws only 12μA typical DC supply current
while maintaining a regulated output voltage at no load.
The LTC3630 can supply up to 500mA load current and
features a programmable peak current limit that provides
a simple method for optimizing efficiency and for reduc-
ing output ripple and component size. The LTC3630’s
combination of Burst Mode® operation, integrated power
switches, low quiescent current, and programmable peak
current limit provides high efficiency over a broad range
of load currents.
With its wide input range of 4V to 65V, the LTC3630 is a
robust converter suited for regulating a wide variety of
power sources. Additionally, the LTC3630 includes a precise
run threshold and soft-start feature to guarantee that the
power system start-up is well-controlled in any environ-
ment. A feedback comparator output enables multiple
LTC3630s to be paralleled in higher current applications.
The LTC3630 is available in the thermally-enhanced
3mm × 5mm DFN and the MSE16 packages.
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
Typical Application
4V to 65V Input to 3.3V Output, 500mA Step-Down Converter
VIN
4V TO 65V
2.2µF
VIN SW
LTC3630
RUN VFB
SS
VPRG1 VPRG2
FBO ISET
GND
47µH
3630 TA01a
VOUT
3.3V
100µF
×2
500mA
Efficiency vs Load Current
100 VOUT = 3.3V
90
VIN = 12V
80
70
VIN = 65V
60
50
40
30
0.1
ISET = 220kΩ||220pF
ISET = OPEN
1 10 100 1000
LOAD CURRENT (mA)
3630 TA01b
For more information www.linear.com/LTC3630
3630fd
1


Linear Technology Electronic Components Datasheet

LTC3630 Datasheet

65V 500mA Synchronous Step-Down Converter

No Preview Available !

LTC3630
Absolute Maximum Ratings (Note 1)
VIN Supply Voltage...................................... –0.3V to 70V
SW Voltage (DC)............................ –0.3V to (VIN + 0.3V)
RUN Voltage................................................. –0.3V to 6V
SS, FBO, ISET Voltages.................................. –0.3V to 6V
VFB, VPRG1, VPRG2 Voltages.......................... –0.3V to 6V
Operating Junction Temperature Range (Notes 2, 3, 4)
LTC3630E, LTC3630I.......................... –40°C to 125°C
LTC3630H........................................... –40°C to 150°C
LTC3630MP........................................ –55°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MSOP................................................................ 300°C
Pin Configuration
SW 1
TOP VIEW
16 GND
VIN 3 17 14 GND
RUN 5 GND 12 FBO
VVPPGRRNGGD21
6
7
8
11
10
ISSSET
9 VFB
MSE PACKAGE
VARIATION: MSE16 (12)
16-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 45°C/W, θJC = 10°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
SW 1
NC 2
VIN 3
NC 4
RUN 5
VPRG2
VPRG1
GND
6
7
8
16 GND
15 NC
14 GND
17 13 NC
GND 12 FBO
11 ISET
10 SS
9 VFB
DHC PACKAGE
16-LEAD (5mm × 3mm) PLASTIC DFN
(NOTE 6)
TJMAX = 150°C, θJA = 43°C/W, θJC = 5°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3630EMSE#PBF
LTC3630EMSE#TRPBF 3630
16-Lead Plastic MSOP
–40°C to 125°C
LTC3630IMSE#PBF
LTC3630IMSE#TRPBF 3630
16-Lead Plastic MSOP
–40°C to 125°C
LTC3630HMSE#PBF
LTC3630HMSE#TRPBF 3630
16-Lead Plastic MSOP
–40°C to 150°C
LTC3630MPMSE#PBF
LTC3630MPMSE#TRPBF 3630
16-Lead Plastic MSOP
–55°C to 150°C
LTC3630EDHC#PBF
LTC3630IDHC#PBF
LTC3630EDHC#TRPBF
LTC3630IDHC#TRPBF
3630
3630
16-Lead (5mm × 3mm) Plastic DFN
16-Lead (5mm × 3mm) Plastic DFN
–40°C to 125°C
–40°C to 125°C
LTC3630HDHC#PBF
LTC3630HDHC#TRPBF 3630
16-Lead (5mm × 3mm) Plastic DFN
–40°C to 150°C
LTC3630MPDHC#PBF
LTC3630MPDHC#TRPBF 3630
16-Lead (5mm × 3mm) Plastic DFN
–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/
3630fd
2 For more information www.linear.com/LTC3630


Part Number LTC3630
Description 65V 500mA Synchronous Step-Down Converter
Maker Linear Technology
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LTC3630 Datasheet PDF






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