LTC3717 查看數據表（PDF） - Linear Technology
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LTC3717
Linear Technology
LTC3717 Datasheet PDF : 20 Pages
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LTC3717
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25°C. VCC = 15V unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VCC(UVLO)
Undervoltage Lockout Threshold
VCC Falling
q
3.4
3.9
V
VCC(UVLOR)
Undervoltage Lockout Threshold
VCC Rising
q
3.5
4
V
TG RUP
TG RDOWN
TG Driver Pull-Up On Resistance
TG Driver Pull-Down On Resistance
TG High
TG Low
2
3
Ω
2
3
Ω
BG RUP
BG Driver Pull-Up On Resistance
BG High
3
4
Ω
BG RDOWN
TG tr
BG Driver Pull-Down On Resistance
TG Rise Time
BG Low
CLOAD = 3300pF
1
2
Ω
20
ns
TG tf
TG Fall Time
CLOAD = 3300pF
20
ns
BG tr
BG Rise Time
CLOAD = 3300pF
20
ns
BG tf
BG Fall Time
Internal VCC Regulator
CLOAD = 3300pF
20
ns
VINTVCC
Internal VCC Voltage
6V < VCC < 30V, VEXTVCC = 4V
q 4.7
5
5.3
V
∆VLDO(LOADREG) Internal VCC Load Regulation
VEXTVCC
EXTVCC Switchover Voltage
ICC = 0mA to 20mA, VEXTVCC = 4V
ICC = 20mA, VEXTVCC Rising
– 0.1
±2
%
q 4.5
4.7
V
∆VEXTVCC
EXTVCC Switch Drop Voltage
ICC = 20mA, VEXTVCC = 5V
150 300
mV
∆VEXTVCC(HYS) EXTVCC Switchover Hysteresis
PGOOD Output
200
mV
∆VFBH
PGOOD Upper Threshold
VFB Rising (0% = 1/3 VREF)
8
10
12
%
∆VFBL
∆VFB(HYS)
PGOOD Lower Threshold
PGOOD Hysteresis
VFB Falling (0% = 1/3 VREF)
VFB Returning (0% = 1/3 VREF)
–8
– 10 – 12
%
1
2
%
VPGL
PGOOD Low Voltage
IPGOOD = 5mA
0.15
0.4
V
Note 1: Absolute Maximum Ratings are those values beyond which the life of
a device may be impaired.
Note 2: TJ is calculated from the ambient temperature TA and power
dissipation PD as follows:
LTC3717EGN: TJ = TA + (PD • 130°C/W)
Note 3: The LTC3717 is tested in a feedback loop that adjusts VFB to achieve
a specified error amplifier output voltage (ITH).
Note 4: The LTC3717E is guaranteed to meet performance specifications from
0°C to 70°C. Specifications over the –40°C to 85°C operating temperature
range are assured by design, characterization and correlation with statistical
process controls.
sn3717 3717fs
3
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