LT3572 Просмотр технического описания (PDF) - Linear Technology
Номер в каталоге
Компоненты Описание
производитель
LT3572 Datasheet PDF : 12 Pages
| |||
LT3572
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, VSHDNA= VSHDNB = VSHDN = 5V, unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
PWMA Pin Threshold
0.3
1.5
V
PWMB Pin Threshold
PGOOD Rising Threshold
PGOOD Falling Threshold
PGOOD Resistance
(Note 3)
(Note 4)
0.3
1.5
V
● 1.12 1.16 1.19
V
● 1.01 1.04 1.065
V
●
1
3
kΩ
Switching Frequency
Maximum Duty Cycle
RT = 75.0kΩ
RT = 13.0kΩ
RT = 75.0kΩ
RT = 13.0kΩ
● 425
500
575
kHz
● 1.9
2.25
2.6
MHz
● 95
%
● 85
%
Synchronization Frequency
575
2500
kHz
SYNC Pin Thresholds
(Note 5)
0.3
1.5
V
SS Current
4.5
μA
FB Pin Voltage
● 1.195 1.225 1.255
V
FB Pin Voltage Line Regulation
FB Pin Bias Current
SW Current Limit
VIN = 2.5V to 10V
VFB = 1.225V (Note 6)
(Note 7)
0.01 0.05
%/V
50
200
nA
0.9
1.3
1.7
A
SW VCESAT
SW Leakage Current
ISW = 800mA
SW = 40V
310
450
mV
0.2
5
μA
OUTx Rise Time
OUTx Fall Time
C = 2.2nF, VOUT = 30V (Note 8)
C = 2.2nF, VOUT = 30V (Note 8)
120
ns
120
ns
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: The LT3572 is guaranteed to meet specified performance from
0°C to 70°C operating junction temperature. Specifications over the
–40°C to 85°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
Note 3: Rising threshold voltage on FB pin that pulls PGOOD low.
Note 4: Falling threshold voltage on FB pin that causes a high impedance
on PGOOD.
Note 5: Minimum pulse width is 100ns. Maximum off pulse width is 100ns.
Note 6: Current flows into the pin.
Note 7: Current limit guaranteed by design and/or correlation to static test.
Note 8: OUTx refers to OUTA, OUTA, OUTB, OUTB.
3572fa
3
Share Link: 