LTC3547B_15 Datasheet, PDF (2/16 Pages) Linear Technology – Dual Monolithic 300mA Synchronous Step-Down Regulator

LTC3547B
ABSOLUTE AXI U RATI GS
(Note 1)
V_IN
LTC3547BE .............................................. –0.3V to 6V
LTC3547BI ............................................... –0.3V to 7V
V_FB1, V_FB2 ......................................... –0.3V to V_IN +0.3V
RUN1, RUN2..................................... –0.3V to V_IN +0.3V
SW1, SW2 (DC) ................................ –0.3V to V_IN +0.3V
P-Channel Switch Source Current (DC)................500mA
N-Channel Switch Sink Current (DC) ...................500mA
Peak SW Sink and Source Current (Note 5) .........700mA
Ambient Operating Temperature Range (Note 2)
LTC3547BE .......................................... –40°C to 85°C
LTC3547BI ......................................... –40°C to 125°C
Maximum Junction Temperature........................... 125°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
V_FB1 1
8 V_FB2
RUN1 2
7 RUN2
9
V_IN 3
6 SW2
SW1 4
5 GND
DDB PACKAGE
8-LEAD (3mm × 2mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 76°C/W
EXPOSED PAD (PIN 9) IS GND
MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3547BEDDB#PBF
LTC3547BEDDB#TRPBF LCPD
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LTC3547BEDDB-1#PBF LTC3547BEDDB-1#TRPBF LCPF
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 85°C
LTC3547BIDDB #PBF
LTC3547BIDDB #TRPBF LCPD
8-Lead (3mm × 2mm) Plastic DFN
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *Temperature grades are 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/
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
V_IN
V_IN Operating Voltage
LTC3547BE, LTC3547BE-1,
LTC3547BI
● 2.5
5.5
● 2.5
6.5
V_UV
V_IN Undervoltage Lockout
V_IN Low to High
●
2.2
2.5
I_FB
V_FBREG1
V_FBREG2
Feedback Pin Input Current
Regulated Feedback Voltage (V_FB1)
Regulated Feedback Voltage (V_FB2)
LTC3547BE, V_FB = V_FBREG
LTC3547BE-1, V_FB = V_FBREG
LTC3547BE, 0°C ≤ T_A ≤ 85°C
LTC3547BE, –40°C ≤ T_A ≤ 85°C
LTC3547BI, –40°C ≤ T_A ≤ 125°C
LTC3547BE-1, 0°C ≤ T_A ≤ 85°C
LTC3547BE-1, –40°C ≤ T_A ≤ 85°C
LTC3547BE, 0°C ≤ T_A ≤ 85°C
LTC3547BE, –40°C ≤ T_A ≤ 85°C
LTC3547BI, –40°C ≤ T_A ≤ 125°C
LTC3547BE-1, 0°C ≤ T_A ≤ 85°C
LTC3547BE-1, –40°C ≤ T_A ≤ 85°C
●
●
0.590
● 0.588
● 0.588
1.770
● 1.764
0.590
● 0.588
● 0.588
1.180
● 1.176
3
0.600
0.600
0.600
1.800
1.800
0.600
0.600
0.600
1.200
1.200
±30
6
0.610
0.612
0.612
1.830
1.836
0.610
0.612
0.612
1.220
1.224
UNITS
V
V
V
nA
μA
V
V
V
V
V
V
V
V
V
V
3547bfb
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