LTC3620 Datasheet, PDF (2/16 Pages) Linear Technology – Ultralow Power 15mA Synchronous Step-Down Switching Regulator

LTC3620
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
Input Supply Voltage.................................... –0.3V to 6V
RUN Voltage ................................. –0.3V to (V_IN + 0.3V)
V_FB Voltage ................................... –0.3V to (V_IN + 0.3V)
LOBATB Voltage........................................... –0.3V to 6V
FMIN/MODE Voltage ..................... –0.3V to (V_IN + 0.3V)
SW Voltage .................................. –0.3V to (V_IN + 0.3V)
P-channel Switch Source Current (DC) ..................50mA
N-channel Switch Sink Current (DC)......................50mA
Operating Junction Temperature Range
(Notes 2, 4)............................................–40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
SW 1
8 V_IN
GND 2
7 RUN
9
FMIN/MODE 3
6 V_FB
LOBATB 4
5 NC
DC PACKAGE
8-LEAD (2mm s 2mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 88.5°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
LTC3620EDC#PBF
LTC3620EDC#TRPBF
LFJJ
8-Lead (2mm × 2mm) Plastic DFN
LTC3620EDC-1#PBF
LTC3620EDC-1#TRPBF LFJK
8-Lead (2mm × 2mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_A = 25°C. V_IN = 3.6V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V_IN
Input Voltage Range
V_FB
Regulated Feedback Voltage (Note 3) LTC3620
LTC3620
LTC3620-1
LTC3620-1
l
2.9
5.5
V
0.594
0.6
0.606
V
l 0.588
0.6
0.612
V
1.089
1.1
1.111
V
l 1.078
1.1
1.122
V
ΔV_FB
V_LOADREG
I_Q
I_QSD
I_QU
Reference Voltage Line Regulation
Output Voltage Load Regulation
Quiescent Current, No Switching
Quiescent Current in Shutdown
Quiescent Current in UVLO Condition
V_IN = 3V to 5.5V (Note 3)
(Note 3)
V_FB = 0.65V, FMIN/MODE = V_IN
RUN = 0V
RUN = V_IN, V_IN = 2.5V
0.05
0.15
%/V
0.5
%
18
25
μA
0.01
1
μA
0.5
μA
I_PK
Peak Inductor Current
f_SW
Minimum Switching Frequency (Internal) V_FB = 0.65V, FIN/MODE = 0
V_RUN
RUN Input Voltage High
RUN Input Voltage Low
35
mA
l
40
50
kHz
0.8
V
0.3
V
I_RUN
RUN Leakage Current
±0.01
±1
μA
3620f
2