LTC3548EDD-2(RevA) Просмотр технического описания (PDF) - Linear Technology
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LTC3548EDD-2
(Rev.:RevA)
(Rev.:RevA)
Linear Technology
LTC3548EDD-2 Datasheet PDF : 16 Pages
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LTC3548-2
ABSOLUTE AXI U RATI GS
(Note 1)
VIN Voltages.................................................– 0.3V to 6V
VOUT1, VFB2 Voltages ...................... – 0.3V to VIN + 0.3V
RUN1, RUN2 Voltages ................................ – 0.3V to VIN
MODE/SYNC Voltage ...................... – 0.3V to VIN + 0.3V
SW1, SW2 Voltage ......................... – 0.3V to VIN + 0.3V
POR Voltage ................................................– 0.3V to 6V
Ambient Operating Temperature Range
(Note 2) .................................................. – 40°C to 85°C
Junction Temperature (Note 5) ............................. 125°C
Storage Temperature Range ................. – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
VOUT1 1
RUN1 2
VIN 3
SW1 4
GND 5
10 VFB2
9 RUN2
11
8 POR
7 SW2
6 MODE/
SYNC
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 40°C/W, θJC = 3°C/W (4-LAYER BOARD)
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB GND
ORDER PART NUMBER DD PART MARKING
LTC3548EDD-2
LCDK
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/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V, unless otherwise specified. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VIN
Operating Voltage Range
● 2.5
5.5
V
IFB2
Feedback Pin Input Current
●
30
nA
VFB2
Feedback Voltage of Channel 2 (Note 3) 0°C ≤ TA ≤ 85°C
–40°C ≤ TA ≤ 85°C
0.588 0.6 0.612
V
● 0.585 0.6 0.612
V
VOUT1
Output Voltage of Channel 1 (Note 3)
0°C ≤ TA ≤ 85°C
–40°C ≤ TA ≤ 85°C
1.764 1.8 1.836
V
● 1.755 1.8 1.836
V
∆VLINE REG Reference Voltage Line Regulation
VIN = 2.5V to 5.5V (Note 3)
0.3
0.5
%/V
∆VLOAD REG Output Voltage Load Regulation
(Note 3)
0.5
%
IS
Input DC Supply Current (Note 4)
Active Mode
VOUT1 = 1.5V, VFB2 = 0.5V
Sleep Mode
VOUT1 = 1.9V, VFB2 = 0.63V, MODE/SYNC = 3.6V
Shutdown
RUN = 0V, VIN = 5.5V, MODE/SYNC = 0V
700 950
µA
40
60
µA
0.1
1
µA
fOSC
Oscillator Frequency
VOUT1 = 1.8V, VFB2 = 0.6V
● 1.8
2.25
2.7
MHz
fSYNC
Synchronization Frequency
2.25
MHz
ILIM
Peak Switch Current Limit Channel 1
VIN = 3V, Duty Cycle <35%
Peak Switch Current Limit Channel 2
VIN = 3V, VFB2 = 0.5V, Duty Cycle <35%
0.95
1.2
1.6
A
0.6
0.7
0.9
A
RDS(ON)
Top Switch On-Resistance
Bottom Switch On-Resistance
(Note 6)
(Note 6)
0.35 0.45
Ω
0.30 0.45
Ω
ISW(LKG)
Switch Leakage Current
VIN = 5V, VRUN = 0V, VFB2 = 0V, VOUT1 = 0V
0.01
1
µA
35482fa
2
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