LTC3523-2_15 Datasheet, PDF (2/16 Pages) Linear Technology – Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters

LTC3523/LTC3523-2
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V_IN1, V_IN2, V_BAT, V_OUT Voltages .................... –0.3V to 6V
SHDN1, PGOOD1, PGOOD2, FB1 Voltages .. –0.3V to 6V
SHDN2, FB2, MODE Voltages ...... –0.3V to (V_IN2 + 0.3V)
SW1 Voltage
DC.............................................................. 0.3V to 6V
Pulse < 100ns.......................................... –0.3V to 7V
SW2 Voltage Pulse < 100ns......... –0.3V to (V_IN2 + 0.3V)
Operating Temperature Range
(Notes 2, 3).............................................. –40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
16 15 14 13
FB1 1
12 FB2
V_IN1 2
PG00D1 3
11 PGOOD2
17
10 MODE
V_OUT 4
9 V_IN2
5678
UD PACKAGE
16-LEAD (3mm s 3mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 68°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
LTC3523EUD#PBF
LTC3523EUD-2#PBF
LTC3523EUD#TRPBF
LTC3523EUD-2#TRPBF
LCYC
LDDR
16-Lead (3mm × 3mm) Plastic DFN
16-Lead (3mm × 3mm) 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
temperature range, otherwise specifications are at T_A = 25°C. V_IN1 = V_IN2 = V_BAT = 2.4V, V_OUT = 3.3V, unless otherwise specified.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Start-Up Voltage
l
1.6
1.8
V
Frequency
LTC3523
LTC3523-2
l 0.9
1.2
1.5
MHz
l 1.8
2.4
2.65
MHz
Quiescent Current–Shutdown
Quiescent Current –Sleep
Quiescent Current V_OUT – Sleep
SHDN1, SHDN2 Input High
SHDN1, SHDN2 Input Low
SHDN1, SHDN2 Input Current
PGOOD1, PGOOD2 Threshold
V_SHDN1 = V_SHDN2 = 0V, V_OUT = 0V, V_IN1 = V_IN2 = V_BAT
Measured from V_SUPPLY, V_IN1 = V_IN2 = V_BAT = 2.4V
Measured from V_OUT = 3.3V (Note 4)
V_SHDN = 5.5V
Referenced to the Feedback Voltage
0.5
3
μA
45
μA
15
μA
1
V
0.35
V
1.4
2
μA
–6
–9
–14
%
PGOOD1, PGOOD2 Low Voltage
PGOOD1, PGOOD2 Leakage
MODE Input High
I_PGOOD = 1mA
V_PGOOD = 5.25V
0.35
V
0.01
1
μA
1.0
V
MODE Input Low
0.35
V
3523fb
2