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LTC3869-2 Datasheet(PDF) 2 Page - Linear Technology

Part # LTC3869-2
Description  Fast, Accurate, 2-Phase, Single-Output Step-Down DC/DC Controller
Download  50 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3869-2 Datasheet(HTML) 2 Page - Linear Technology

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LTC3839
2
3839fa
ABSOLUTE MAXIMUM RATINGS
VIN Voltage................................................. –0.3V to 40V
BOOST1, BOOST2 Voltages ....................... –0.3V to 46V
SW1, SW2 Voltages ...................................... –5V to 40V
INTVCC, DRVCC1, DRVCC2, EXTVCC, PGOOD, RUN,
(BOOST1-SW1), (BOOST2-SW2), MODE/PLLIN
Voltages ....................................................... –0.3V to 6V
VOUTSENSE+, VOUTSENSE–, SENSE1+, SENSE2+,
SENSE1, SENSE2Voltages ....................... –0.6V to 6V
TRACK/SS Voltage....................................... –0.3V to 5V
DTR, PHASMD, RT, VRNG,
ITH Voltages ........................... –0.3V to (INTVCC + 0.3V)
Operating Junction Temperature Range
(Notes 2, 3, 4)........................................ –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
(Note 1)
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3839EUH#PBF
LTC3839EUH#TRPBF
3839
32-Lead (5mm
× 5mm) Plastic QFN
–40°C to 125°C
LTC3839IUH#PBF
LTC3839IUH#TRPBF
3839
32-Lead (5mm
× 5mm) Plastic QFN
–40°C to 125°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/
32
33
PGND
31 30 29 28 27 26 25
9
10 11 12
TOP VIEW
UH PACKAGE
32-LEAD (5mm
× 5mm) PLASTIC QFN
13 14 15 16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1
PHASMD
MODE/PLLIN
CLKOUT
SGND
RT
ITH
TRACK/SS
VOUTSENSE
+
BG2
DRVCC2
EXTVCC
INTVCC
PGND
VIN
DRVCC1
BG1
TJMAX = 125°C, θJA = 44°C/W
EXPOSED PAD (PIN 33) IS PGND, MUST BE SOLDERED TO PCB
PIN CONFIGURATION
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C. VIN = 15V unless otherwise noted (Note 3).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Main Control Loops
VIN
Input Voltage Operating Range
4.5
38
V
VOUT(REG)
Regulated Output Voltage Operating Range VOUT Regulated Differentially with Respect to
VOUTSENSE–
0.6
5.5
V
IQ
Input DC Supply Current
RUN Enabled
Shutdown Supply Current
MODE/PLLIN = 0V, No Load
RUN = 0V
3
15
mA
μA
VOUTSENSE(REG) Regulated Differential Feedback Voltage
(VOUTSENSE+ – VOUTSENSE–)
ITH1 = 1.2V (Note 5)
TA = 25°C
TA = 0°C to 85°C
TA = –40°C to 125°C
l
l
0.5985
0.596
0.594
0.6
0.6
0.6
0.6015
0.604
0.606
V
V
V
Regulated Differential Feedback Voltage
Over Line, Load and Common Mode
VIN = 4.5V to 38V, ITH1 = 0.5V to 1.9V
–0.5V < VOUTSENSE– < 0.5V (Notes 5, 7)
l
0.591
0.6
0.609
V


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