LTC3545-1_15 Datasheet, PDF (2/20 Pages) Linear Technology – Triple 800mA Synchronous Step-Down Regulator–2.25MHz

LTC3545/LTC3545-1
ABSOLUTE MAXIMUM RATINGS (Note 1)
Input Supply Voltage.................................... –0.3V to 6V
RUNx, PGOODx............................. –0.3V to (V_IN + 0.3V)
V_FBx, SYNC/MODE ........................ –0.3V to (V_IN + 0.3V)
SWx .............................................. –0.3V to (V_IN + 0.3V)
P-Switch Source Current (DC) (Note 8) ...................1.1A
N-Channel Sink Current (DC) (Note 8) .....................1.1A
Peak SW Sink and Source Current (Note 8) .............1.3A
Operating Junction Temperature Range
(Note 2) ............................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
LTC3545
TOP VIEW
16 15 14 13
SW1 1
12 V_FB2
PGOOD1 2
17
11 V_FB3
RUN2 3
10 RUN3
PGOOD2 4
9 SYNC/MODE
5678
UD PACKAGE
16-LEAD (3mm s 3mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 55°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
LTC3545-1
TOP VIEW
16 15 14 13
SW1 1
12 V_FB2
PGOOD1 2
17
11 V_FB3
RUN2 3
10 RUN3
PGOOD2 4
9 PGOOD3
5678
UD PACKAGE
16-LEAD (3mm s 3mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 55°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3545EUD#PBF
LTC3545EUD#TRPBF
LCSR
16-Lead (3mm × 3mm) Plastic QFN –40°C to 125°C
LTC3545IUD#PBF
LTC3545IUD#TRPBF
LCSR
16-Lead (3mm × 3mm) Plastic QFN –40°C to 125°C
LTC3545EUD-1#PBF
LTC3545EUD-1#TRPBF LDDP
16-Lead (3mm × 3mm) Plastic QFN –40°C to 125°C
LTC3545IUD-1#PBF
LTC3545IUD-1#TRPBF LDDP
16-Lead (3mm × 3mm) Plastic QFN –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is 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 = PV_IN = 3.6V unless otherwise noted. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
General Characteristics
V_IN
V_FBx
ΔV_FBx
Input Voltage Range
Regulated Feedback Voltage (Note 5)
Reference Voltage Line Regulation (Note 5)
T_A = 25°C
0°C ≤ T_A ≤ 85°C
LTC3545IUD; –40°C < T_A < 125°C
V_IN = 2.25V to 5.5V
● 2.25
5.5
V
0.592 0.6 0.608
V
● 0.588 0.6 0.612
V
● 0.588 0.6 0.612
V
●
0.08 0.15
%/V
35451fb
2