LTC3442 データシートの表示（PDF） - Linear Technology
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LTC3442
Linear Technology
LTC3442 Datasheet PDF : 20 Pages
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LTC3442
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 4)
VIN, VOUT Voltage.............................................– 0.3 to 6V
SW1, SW2 Voltage
DC................................................................ –0.3 to 6V
Pulsed <100ns.................................................. –0.3 to 7V
SHDN/SS, BURST Voltage................................ –0.3 to 6V
RLIM............................................................................ VIN
Operating Temperature (Note 2).................–40°C to 85°C
Maximum Junction Temperature (Note 4)............... 125°C
Storage Temperature Range.....................–65°C to 125°C
PIN CONFIGURATION
TOP VIEW
SHDN/SS 1
RT 2
SGND 3
SW1 4
PGND 5
SW2 6
13
PGND
12 FB
11 VC
10 RLIM
9 VIN
8 VOUT
7 BURST
DE12 PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 53°C/W 1-LAYER BOARD
θJA = 43°C/W 4-LAYER BOARD, θJC = 4.3°C/W
EXPOSED PAD (PIN 13) IS PGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3442EDE#PBF
LTC3442EDE#TRPBF
3442
12-Lead (4mm × 3mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = VOUT = 3.6V, RT = 64.9k, unless otherwise noted (Note 2).
PARAMETER
CONDITIONS
MIN TYP MAX
Input Start-Up Voltage
l
2.3 2.4
Output Voltage Adjust Range
l 2.4
5.25
Feedback Voltage
l 1.19 1.22 1.25
Feedback Input Current
Quiescent Current – Burst Mode Operation
Quiescent Current – Shutdown
Quiescent Current – Active
NMOS Switch Leakage
VFB = 1.22V
VFB = 1.22V, BURST = 0V (Note 3)
SHDN = 0V, VOUT = 0V, Not Including Switch Leakage
BURST = VIN (Note 3)
Switches B and C
1
50
35 60
0.1
1
600 1100
0.1
2
PMOS Switch Leakage
Switches A and D
0.1
3
NMOS Switch On Resistance
Switches B and C
0.10
PMOS Switch On Resistance
Switches A and D
0.10
Input Current Limit
l2
3
Reverse Current Limit
0.5
Burst Mode Operation Current Limit
0.9
Max Duty Cycle
Boost (% Switch C On)
Buck (% Switch A In)
l 70 88
l 100
Min Duty Cycle
l
0
Frequency Accuracy
l 570 670 770
Error Amp AVOL
90
Error Amp Source Current
BURST > 1.25V
11
UNITS
V
V
V
nA
µA
µA
µA
µA
µA
Ω
Ω
A
A
A
%
%
%
kHz
dB
µA
3442fb
2
For more information www.linear.com/LTC3442
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