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LTC3850IGN#PBF

Description
IC REG CTRLR BUCK 28SSOP
CategoryPower/power management    The power supply circuit   
File Size422KB,10 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC3850IGN#PBF Overview

IC REG CTRLR BUCK 28SSOP

LTC3850IGN#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeSSOP
package instructionSSOP, SSOP28,.25
Contacts28
Manufacturer packaging codeGN
Reach Compliance Codecompliant
ECCN codeEAR99
Is SamacsysN
Analog Integrated Circuits - Other TypesDUAL SWITCHING CONTROLLER
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage30 V
Minimum input voltage4 V
Nominal input voltage15 V
JESD-30 codeR-PDSO-G28
JESD-609 codee3
length9.893 mm
Humidity sensitivity level1
Number of functions1
Number of terminals28
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current0.1 A
Nominal output voltage5 V
Package body materialPLASTIC/EPOXY
encapsulated codeSSOP
Encapsulate equivalent codeSSOP28,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
Switch configurationPHASE-SHIFT
Maximum switching frequency860 kHz
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.635 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.899 mm
Base Number Matches1
DEMO MANUAL
DC1185B-A/-B
LTC3850EUF
Dual Phase/Dual Output
Synchronous Buck Converter
DESCRIPTION
Demonstration circuit 1185 is a dual phase/dual output
synchronous buck converter featuring the
LTC3850EUF.
The demo board comes in two versions. The output volt-
ages for version DC1185B-A are 2.0V/10A and 1.8V/10A.
The output voltages for version DC1185B-B are 1.5V/15A
and 1.2V/15A. The input voltage range is 6.5V to 14V for
both versions. For applications that have a 5V ±0.5V input,
the board has an optional resistor to tie the INTVCC pin
to the VIN pin.
The demo board uses a high density, 2-sided drop-in layout.
The power components excluding the bulk output and input
capacitors, fit within a 1.35"
×
0.75" area on the top layer.
The control circuit resides in a 0.60"
×
0.75" area on the
bottom layer. The package style for the LTC3850EUF is a
4mm
×
4mm 28-lead QFN with an exposed ground pad.
The main features of the board include an internal 5V linear
regulator for bias, RUN pins for each output, an EXTVCC
pin and a PGOOD signal. The board can be configured
for either CCM (original setting), Burst Mode
®
, or pulse-
skipping operation with the MODE jumper. The board
also has optional resistors for single output/dual phase
operation, rail tracking, DCR sensing and synchronization
to an external clock.
Design files for this circuit board are available at
http://www.linear.com/demo
L,
LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
Note: Q1-Q4 MOSFETs changed on September 10, 2013.
See Schematic Diagram.
PERFORMANCE SUMMARY
PARAMETER
Minimum Input Voltage
Maximum Input Voltage
Version DC1185B-A
Output Voltage V
OUT1
Output Voltage V
OUT2
Nominal Switching Frequency
Full-Load Efficiency
(See Figure 3 for Efficiency Curves)
Version DC1185B-B
Output Voltage V
OUT1
Output Voltage V
OUT2
Nominal Switching Frequency
Full-Load Efficiency
(See Figure 4 for Efficiency Curves)
Specifications are at T
A
= 25°C
VALUE
6.5V
14V
CONDITION
I
OUT1
= 0A to 10A
I
OUT2
= 0A to 10A
V
OUT1
= 2.0V, I
OUT1
= 10A, V
IN
= 12V
V
OUT2
= 1.8V, I
OUT2
= 10A, V
IN
= 12V
2.0V ±2%
1.8V ±2%
500kHz
90.2%
89.5%
I
OUT1
= 0A to 15A
I
OUT2
= 0A to 15A
V
OUT1
= 1.5V, I
OUT1
= 15A, V
IN
= 12V
V
OUT2
= 1.2V, I
OUT2
= 15A, V
IN
= 12V
1.5V ±2%
1.2V ±2%
400kHz
88.1%
86.5%
dc1185b-a/-bf
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