LTC3458LEDE View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC3458LEDE Datasheet PDF : 16 Pages
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LTC3458L
ABSOLUTE AXI U RATI GS
(Note 1)
VIN, SS, SYNC Voltages ................................. –0.3 to 7V
BURST, SHDN, VOUT Voltages ....................... –0.3 to 7V
Operating Temperature Range
(Notes 2, 3) .........................................–40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
SW Voltage
DC ........................................................... –0.3V to 7V
Pulsed <100ns ........................................ –0.3V to 8V
PIN CONFIGURATION
TOP VIEW
SW 1
12 VOUT
VIN 2
11 BURST
SYNC 3
10 SS
13
SHDN 4
9 GND
ILIM 5
RT 6
8 COMP
7 FB
DE PACKAGE
12-LEAD (4mm × 3mm) PLASTIC DFN
EXPOSED PAD IS PGND (PIN 13),
MUST BE SOLDERED TO PCB
TJMAX = 125°C, θJA = 45°C/W
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL
PART MARKING PACKAGE DESCRIPTION
LTC3458LEDE#PBF LTC3458LEDE#TRPBF 3458L
12-Lead (4mm x 3mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC for information on nonstandard 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/
TEMPERATURE RANGE
–40ºC to 85ºC
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V, VOUT = 5V, RT = 200k, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum VIN Operating Voltage
Output Voltage Adjust Range
TA = 0°C to 85°C
TA = –40°C to 0°C
1.4
1.5
V
1.4
1.7
V
●2
6
V
Feedback Voltage
0°C to 85°C, VOUT = 3.3V
–40°C to 0°C
1.21 1.225 1.25
V
1.20
1.25
V
Undervoltage (Exit Burst Mode Operation)
Below Feedback Voltage
–4
%
Feedback Input Current
Quiescent Current – Burst Mode Operation
Quiescent Current – Shutdown
Quiescent Current – Active
NMOS Switch Leakage
VFB = 1.23V
VIN Current at 3.3V
VOUT Current at 5V
VIN Current at 3.3V
VOUT Current at 0V
VIN Current Switching
1
50
nA
12
30
μA
5
10
μA
0.5
1
μA
1
3
μA
1
3
mA
●
0.05
5
μA
PMOS Switch Leakage
●
0.05
5
μA
NMOS Switch On Resistance
PMOS Switch On Resistance
Fixed NMOS Current Limit
Maximum Duty Cycle
Minimum Duty Cycle
VOUT = 5V
VOUT = 5V
RILIM = 84.5k
VIN = 3.3V, fOSC = 1MHz
0.2
Ω
0.3
Ω
● 1.7
2.1
A
● 80
90
%
●
0
%
Frequency Accuracy
Error Amplifier Transconductance
RT = 200k
● 0.85
1
1.15
MHz
60
μA/V
Error Amplifier Source Current
7
μA
3458lfa
2
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