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参数资料
| 型号： | LTC3783IFE#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | 4.40 MM, PLASTIC, TSSOP-16 |
| 文件页数： | 19/24页 |
| 文件大小： | 250K |
| 代理商： | LTC3783IFE#TR |
LTC3783
4
3783fb
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 LTC3783E is guaranteed to meet performance specications
over the 0°C to 85°C operating temperature range. Specications over
the –40°C to 85°C operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC3783I is guaranteed to meet performance specications over the full
–40°C to 125°C operating temperature range.
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
TJ = TA + (PD 43°C/W) for the DFN
TJ = TA + (PD 38°C/W) for the TSSOP
The
l denotes the specications which apply over the full operating temperature
range, otherwise specications are TA = 25°C. VIN = 12V, VRUN = 1.5V, VSYNC = 0V, VFBP = VREF, RT = 20k, unless otherwise specied.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RSYNC
SYNC Input Pull-Down Resistance
100
kΩ
tON(MIN)
Minimum On-Time
With Sense Resistor, 10mV Overdrive
No RSENSE Mode
170
300
ns
Low Dropout Regulator
VINTVCC
INTVCC Regulator Output Voltage
VOV/FB = 1.5V
l
6.5
7
7.5
V
UVLO
INTVCC Undervoltage Lockout
Thresholds
Rising INTVCC
Falling INTVCC
Hysteresis
1.8
2.3
2.1
0.2
2.5
V
ΔVINTVCC
ΔVIN
INTVCC Line Regulation
12V ≤ VIN ≤ 36V
2
6
mV/V
ΔVLDO(LOAD)
INTVCC Load Regulation
0 ≤ IINTVCC ≤ 10mA
–1
–0.1
%
VDROPOUT
INTVCC Dropout Voltage
VIN = 7V, IINTVCC = 10mA
300
500
mV
IINTVCC(SD)
Bootstrap Mode INTVCC Supply
Current in Shutdown
VSENSE = 0V
VSENSE = 7V
25
15
μA
GATE/PWMOUT Drivers
tr(GATE)
GATE Driver Output Rise Time
CL = 3300pF (Note 7)
15
ns
tf(GATE)
GATE Driver Output Fall Time
CL = 3300pF (Note 7)
8
ns
IPK(GATE,RISE)
GATE Driver Peak Current Sourcing
VGATE = 0V
0.5
A
IPK(GATE,FALL)
GATE Driver Peak Current Sinking
VGATE = 7V
1
A
VPWMIN
PWMIN Pin Input Threshold Voltages
Rising PWMIN
Falling PWMIN
Hysteresis
1.6
0.8
V
RPWMIN
PWMIN Input Pull-Up Resistance
100
kΩ
tr(PWMOUT)
PWMOUT Driver Output Rise Time
CL = 3300pF (Note 7)
30
ns
tf(PWMOUT)
PWMOUT Driver Output Fall Time
CL = 3300pF (Note 7)
16
ns
IPK(PWMOUT,RISE)
PWMOUT Driver Peak Current Sourcing
VPWMOUT = 0V
0.25
A
IPK(PWMOUT,FALL)
PWMOUT Driver Peak Current Sinking
VPWMOUT = 7V
0.50
A
Note 4: The dynamic input supply current is higher due to power MOSFET
gate charging (QG fOSC). See Operation section.
Note 5: The LTC3783 is tested in a feedback loop which servos VFBN to
VFBP = VVREF with the ITH pin forced to the midpoint of its voltage range
(0.3V ≤ VITH ≤ 1.2V; midpoint = 0.75V).
Note 6: In a synchronized application, the internal slope compensation is
increased by 25%. Synchronizing to a signicantly higher ratio will reduce
the effective amount of slope compensation, which could result in sub-
harmonic oscillation for duty cycles greater than 50%
Note 7: Rise and fall times are measured at 10% and 90% levels.
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