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LTC3422 Datasheet(Fiches technique) 2 Page - Linear Technology

Numéro de pièce LTC3422
Description  1.5A, 3MHz Synchronous Step-Up DC/DC Converter with Output Disconnect
Télécharger  16 Pages
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Fabricant  LINER [Linear Technology]
Site Internet  http://www.linear.com
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 2 page
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LTC3422
2
3422fa
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum VIN Start-Up Voltage
ILOAD < 1mA
0.88
1
V
Minimum VIN Operating Voltage
(Note 3)
0.5
V
Output Voltage Adjust Range
2.25
5.25
V
2.40
5.25
V
Feedback Voltage
1.192
1.216
1.240
V
Feedback Input Current
VFB = 1.216V
1
50
nA
Quiescent Current—Burst Mode Operation
VC = 0V (Note 4)
25
42
µA
Quiescent Current—Shutdown
SHDN = 0V, VOUT = 0V
0.1
1
µA
Quiescent Current—Active
VC = 0V (Note 4)
0.75
1.1
mA
NMOS Switch Leakage
0.1
5
µA
PMOS Switch Leakage
VOUT = 2V
0.1
10
µA
NMOS Switch On Resistance
VOUT = 3.3V
0.20
PMOS Switch On Resistance
VOUT = 3.3V
0.24
NMOS Current Limit—Steady State
1.5
A
NMOS Current Limit—Pulsed
Duty Cycle Not to Exceed 5%
2
2.5
A
NMOS Current Limit—Short Circuit
VOUT = 500mV, VIN = 2.5V
0.75
1.5
A
NMOS Burst Current Limit
600
mA
Maximum Duty Cycle
84
91
%
Minimum Duty Cycle
0%
Frequency
0.85
1
1.15
MHz
SYNC Input High
2.2
V
SYNC Input Low
0.8
V
SYNC Input Current
0.01
1
µA
VIN, VOUT, SYNC Voltages ........................... – 0.3V to 6V
FB, SS, BURST, SHDN Voltages ................ – 0.3V to 6V
SW Voltage
DC .......................................................... – 0.3V to 6V
Pulsed < 100ns ...................................... – 0.3V to 7V
Operating Temperature Range
(Notes 2, 5) ............................................. –40
°C to 85°C
Storage Temperature Range ................. – 65
°C to 125°C
ORDER PART NUMBER
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC3422EDD
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
(Note 1)
TJMAX = 125°C, θJA = 43°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 1.2V, VOUT = 3.3V, RT = 28k, unless otherwise noted. (Note 2)
TOP VIEW
11
DD PACKAGE
10-LEAD (3mm
× 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
VOUT
SYNC
RT
VC
FB
SW
VIN
BURST
SS
SHDN
DD PART MARKING
LBRN
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF
Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/




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