LTC3499_15 Datasheet, PDF (3/16 Pages) Linear Technology – 750mA Synchronous Step-Up DC/DC Converters with Reverse-Battery Protection

LTC3499/LTC3499B
ELECTRICAL CHARACTERISTICS The l denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T_A = 25°C. V_IN = 2.4V, V_OUT = 5V, SHDN = 2.4V, T_A = T_J unless otherwise noted. (Note 3)
SYMBOL
I_FB
I_VIN
I_SD
I_BURST
PARAMETER
FB Input Current
V_IN Quiescent Current
V_IN Quiescent Current in Shutdown
Quiescent Current – Burst Mode Operation
I_NMOS
I_PMOS
R_NMOS
NMOS Switch Leakage Current
PMOS Switch Leakage Current
NMOS Switch On Resistance
R_PMOS
PMOS Switch On Resistance
I_LIM
t_{DLY, ILIM}
D_MAX
D_MIN
f_OSC
G_mEA
I_SOURCE
I_SINK
I_SS
V_OV
V_OV(HYST)
Shutdown
V_SHDN(LOW)
V_SHDN(HIGH)
I_SD
Reverse Battery
I_VOUT,REVBATT
I_VIN,REVBATT
I_SHDN,REVBATT
NMOS Current Limit
Current Limit Delay to Output
Maximum Duty Cycle
Minimum Duty Cycle
Frequency Accuracy
Error Amplifier Transconductance
Error Amplifier Source Current
Error Amplifier Sink Current
SS Current Source
V_OUT Overvoltage Threshold
V_OUT Overvoltage Hysteresis
SHDN Input Low Voltage
SHDN Input High Voltage
SHDN Input Current
V_OUT Reverse-Battery Current
V_IN and V_SW Reverse-Battery Current
SHDN Reverse-Battery Current
CONDITIONS
V_FB = 1.22V
No Output Load
SHDN = 0V, V_OUT = 0V
V_IN Current at 2.4V (LTC3499 Only)
V_OUT Current at 5V (LTC3499 Only)
V_SW = 6V
V_OUT = 6V, V_SW = 0V
V_OUT = 3.3V
V_OUT = 5V
V_OUT = 3.3V
V_OUT = 5V
Note 2
V_SS = 1V
Measured at SW
V_OUT = 0V, V_IN = V_SHDN = V_SW = –6V
V_OUT = 0V, V_IN = V_SHDN = V_SW = –6V
V_OUT = 0V, V_IN = V_SHDN = V_SW = –6V
MIN TYP MAX UNITS
3
50
nA
l
300
600
µA
0.1
1
µA
20
µA
1.5
µA
0.1
5
µA
0.1
5
µA
0.45
Ω
0.4
Ω
0.58
Ω
0.45
Ω
l 0.75
1
A
60
ns
l 80
85
%
l
0
%
l
1
1.2
1.4
MHz
40
µmhos
–5
µA
5
µA
–3
µA
6.8
V
400
mV
l
l 1.2
0.2
V
V
1
µA
l
5
µA
l
–5
µA
l
–5
µA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Specification is guaranteed by design and not 100% tested in
production.
Note 3:The LTC3499E/LTC3499BE are guaranteed to meet device
specifications from 0°C to 85°C. Specifications over the –40°C to 85°C
operating temperature are assured by design, characterization and
correlation with statistical process controls.
Note 4: These ICs include overtemperature protection that is intended
to protect the devices during momentary overload conditions. Junction
temperatures will exceed 125°C when overtemperature protection is
active. Continuous operation above the specified maximum operating
temperature range may impair device reliability.
3499fc
3