Regulator Controller. LTC3810-5 Datasheet

LTC3810-5 Controller. Datasheet pdf. Equivalent

Part LTC3810-5
Description 60V Current Mode Synchronous Switching Regulator Controller
Feature Features n High Voltage Operation: Up to 60V n Large 1Ω Gate Drivers n No Current Sense Resistor .
Manufacture Linear Technology
Datasheet
Download LTC3810-5 Datasheet



LTC3810-5
Features
n High Voltage Operation: Up to 60V
n Large 1Ω Gate Drivers
n No Current Sense Resistor Required
n Dual N-Channel MOSFET Synchronous Drive
n Extremely Fast Transient Response
n ±0.5% 0.8V Voltage Reference
n Programmable Output Voltage Tracking/Soft-Start
n Generates 5.5V Driver Supply from Input Supply
n Synchronizable to External Clock
n Selectable Pulse Skip Mode Operation
n Power Good Output Voltage Monitor
n Adjustable On-Time/Frequency: tON(MIN) < 100ns
n Adjustable Cycle-by-Cycle Current Limit
n Programmable Undervoltage Lockout
n Output Overvoltage Protection
n 5mm × 5mm QFN Package
Applications
n 48V Telecom and Base Station Power Supplies
n Networking Equipment, Servers
n Automotive and Industrial Control Systems
L, LT, LTC, LTM, Linear Technology, the Linear logo and No RSENSE are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners. Protected by U.S. Patents including 5481178, 5847554, 6304066, 6476589, 6580258,
6677210, 6774611.
LTC3810-5
60V Current Mode
Synchronous Switching
Regulator Controller
Description
The LTC®3810-5 is a synchronous step-down switching
regulator controller that can directly step-down voltages
from up to 60V, making it ideal for telecom and automo-
tive applications. The LTC3810-5 uses a constant on-time
valley current control architecture to deliver very low duty
cycles with accurate cycle-by-cycle current limit, without
requiring a sense resistor.
A precise internal reference provides 0.5% DC accuracy. A
high bandwidth (25MHz) error amplifier provides very fast
line and load transient response. Large 1Ω gate drivers
allow the LTC3810-5 to drive multiple MOSFETs for higher
current applications. The operating frequency is selected
by an external resistor and is compensated for variations
in VIN and can also be synchronized to an external clock
for switching-noise sensitive applications. A shutdown
pin allows the LTC3810-5 to be turned off, reducing the
supply current to 240µA.
Integrated bias control generates gate drive power from
the input supply during start-up or when an output short-
circuit occurs, with the addition of a small external SOT23
MOSFET. When in regulation, power is derived from the
output for higher efficiency.
Typical Application
High Efficiency High Voltage Step-Down Converter
274k
ION
NDRV
VIN
+ 13V TO 60V
100k 22µF
ZXMN10A07F
1000pF
47pF 200k
5pF
PGOOD
BOOST
VRNG LTC3810-5 TG
MODE/SYNC
SW
SS/TRACK
SHDN
EXTVCC
DRVCC
INTVCC
ITH SENSE+
BG
VFB SENSE
SGND BGRTN
0.1µF
1µF
Si7450DP
10µH
Si7450DP
MBR1100
14k
+
1k
VOUT
12V/6A
270µF
Efficiency vs Load Current
100
VIN = 24V
95 VIN = 42V
90
85
0
12 34
LOAD CURRENT (A)
56
38105 TA01b
38105 TA01
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LTC3810-5
LTC3810-5
Absolute Maximum Ratings
(Note 1)
Supply Voltages
INTVCC, DRVCC....................................... –0.3V to 14V
(DRVCC – BGRTN), (BOOST – SW)......... –0.3V to 14V
BOOST (Continuous)............................... –0.3V to 85V
BOOST (≤400ms)................................... –0.3V to 95V
BGRTN......................................................... –5V to 0V
EXTVCC................................................... –0.3V to 15V
(EXTVCC – INTVCC)................................... –12V to 12V
(SNWD,RSVEN–SINE+TVVCoClt)aVgeol(tCagoen.t..in..u..o..u..s..).............................–...0–.13VV
to
to
10V
70V
SW, SENSE+ Voltage (400ms).........................–1V to 80V
ION Voltage (Continuous)............................. –0.3V to 70V
ION Voltage (400ms).................................... –0.3V to 80V
SS/TRACK Voltage........................................ –0.3V to 5V
PGOOD Voltage............................................. –0.3V to 7V
VRNG, VON, MODE/SYNC, SHDN,
UVIN Voltages............................................. –0.3V to 14V
PLL/LPF, FB Voltages................................. –0.3V to 2.7V
TG, BG, INTVCC, EXTVCC RMS Currents.................50mA
Operating Junction Temperature Range (Notes 2, 3, 7)
LTC3810E-5........................................ –40°C to 125°C
LTC3810I-5......................................... –40°C to 125°C.
LTC3810H-5........................................ –40°C to 150°C
Storage Temperature Range................... –65°C to 125°C
Pin Configuration
TOP VIEW
NC 1
VON
VRNG
PGOOD
2
3
4
MODE/SYNC 5
ITH 6
VFB 7
PLL/LPF 8
32 31 30 29 28 27 26 25
24 SENSE+
23 NC
22 NC
21 NC
33 20 SENSE
19 BGRTN
18 BG
17 DRVCC
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 34°C/W
EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3810EUH-5#PBF
LTC3810EUH-5#TRPBF 38105
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3810IUH-5#PBF
LTC3810IUH-5#TRPBF 38105
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 125°C
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3810EUH-5
LTC3810EUH-5#TR
38105
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3810IUH-5
LTC3810IUH-5#TR
38105
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3810HUH-5
LTC3810HUH-5#TR
38105
32-Lead (5mm × 5mm) Plastic QFN
–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/
38105fd
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