LTC3499 Datasheet, PDF (3/16 Pages) Linear Technology – 750mA Synchronous Step-Up DC/DC Converters with Reverse-Battery Protection

LTC3499/LTC3499B
ELECTRICAL CHARACTERISTICS _{The ● 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.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
I_NMOS
I_PMOS
R_NMOS
R_PMOS
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
NMOS Switch Leakage
PMOS Switch Leakage
NMOS Switch On Resistance
PMOS Switch On Resistance
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
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
0.1
0.1
0.45
0.4
0.58
0.45
● 0.75
60
● 80
85
●
●1
1.2
40
–5
5
–3
6.8
400
5
µA
5
µA
Ω
Ω
Ω
Ω
A
ns
%
0
%
1.4
MHz
µmhos
µA
µA
µA
V
mV
V_SHDN(LOW)
V_SHDN(HIGH)
I_SD
Reverse Battery
SHDN Input Low
SHDN Input High
SHDN Input Current
Measured at SW
●
● 1.2
0.2
V
V
1
µA
I_VOUT,REVBATT
V_OUT Reverse-Battery Current
V_OUT = 0V, V_IN = V_SHDN = V_SW = –6V
●
I_VIN,REVBATT
V_IN and V_SW Reverse-Battery Current
V_OUT = 0V, V_IN = V_SHDN = V_SW = –6V
●
I_SHDN,REVBATT
SHDN Reverse-Battery Current
V_OUT = 0V, V_IN = V_SHDN = V_SW = –6V
●
5
µA
–5
µA
–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.
3499f
3