參數(shù)資料
型號： LTC3773EUHF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PQCC38
封裝： 5 X 7 MM, PLASTIC, MO-220WHKD, QFN-38
文件頁數(shù)： 23/32頁
文件大?。?/td> 461K
代理商： LTC3773EUHF
LTC3773
3
3773fa
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VUVR
VCC Undervoltage Reset
VCC Ramping Positive
3.7
4.1
4.4
V
Undervoltage Hysteresis
0.16
V
VCC
VCC Supply Voltage
●
4.5
5
6
V
IVCC
VCC Supply Current
Normal Mode
VCC = 5V
2.8
4
mA
Shutdown
VSDB = 0V
20
30
A
IVDR
VDR Supply Current
Normal Mode
VDR = 5V (Note 6)
5
mA
Shutdown
VSDB = 0V
1
A
IBOOST
VBOOST Supply Current
Normal Mode
VBOOST = 5V, VSW = 0V (Note 6)
1
mA
Shutdown
VSDB = 0V
1
A
ISDB
SDB Source Current
– 1.5
A
SDB1, SDB2, SDB3 Source Current
– 0.5
A
VSDB
SDB Power Up Threshold
Ramping Positive
●
0.4
V
SDB1 Pin CH1 ON Threshold
●
1.14
1.2
1.26
V
SDB2 Pin CH2 ON Threshold
●
1.71
1.8
1.89
V
SDB3 Pin CH3 ON Threshold
●
2.3
2.4
2.5
V
Channel On Threshold Hysteresis
– 10
%
ISENSE
SENSE Pins Source Current
VSENSE
+, VSENSE– = 1.2V, Current at Each Pin
–13
–20
A
DFMAX
Maximum Duty Factor
PLLFLTR Floats, In Dropout
97
98.5
%
TG RUP
TG Driver Pull-Up On-Resistance
TG High, IOUT = 100mA (Note 7)
2.2
Ω
TG RDOWN
TG Driver Pull-Down On-Resistance
TG Low, IOUT = 100mA (Note 7)
1.8
Ω
BG RUP
BG Driver Pull-Up On-Resistance
BG High, IOUT = 100mA (Note 7)
2.4
Ω
BG RDOWN
BG Driver Pull-Down On-Resistance
BG Low, IOUT = 100mA (Note 7)
0.9
Ω
TG/BG t1D
Top Gate OFF to Bottom Gate ON Delay All Controllers
50
ns
Synchronous Switch-On Delay Time
BG/TG t2D
Bottom Gate OFF to Top Gate ON Delay All Controllers
50
ns
Top Switch-On Delay Time
tON(MIN)
Minimum On-Time
Tested with a Square Wave (Note 8)
130
ns
Tracking
ITRACK
TRACK Pin Pull-Up Current
VSDB = 5V, VTRACK = 0V
– 1
A
VFBTRACK
VFB Voltage During Tracking
VTRACK = 0.2V, VITH = 1.2V (Note 4)
180
200
220
mV
VTRACK = 0.4V, VITH = 1.2V (Note 4)
380
400
420
mV
Power Good Output Indication
VPGL
PGOOD Voltage Output Low
IPGOOD = 2mA
0.1
0.3
V
IPGOOD
PGOOD Output Leakage
VPGOOD = 5V
1
A
PGOOD Trip Thresholds
VFB with Respect to 0.6V Reference
VPGTHNEG
VFB Ramping Negative
PGOOD Goes Low After VPGDLY Delay
– 7
– 10
– 13
%
VPGTHPOS
VFB Ramping Positive
7
10
13
%
VPGDLY
PGOOD Delay
100
150
s
Oscillator and Phase-Locked Loop
fNOM
Nominal Frequency
VPLLFLTR Open
360
400
440
kHz
fLOW
Low Frequency
VPLLFLTR = 0V
190
220
250
kHz
fHIGH
High Frequency
VPLLFLTR = 5V
510
560
630
kHz
fPLLLOW
PLLIN Minimum Input Frequency
160
200
kHz
fPLLHIGH
PLLIN Maximum Input Frequency
540
700
kHz
ELECTRICAL CHARACTERISTICS (Note 3) The ● denotes the specications which apply over the full
operating temperature range, otherwise specications are at TA = 25°C. VCC = VDR = VBOOST = VSDB = 5V, unless otherwise noted.
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