參數(shù)資料
型號: LTC3788IGN-1#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: DUAL SWITCHING CONTROLLER, 900 kHz SWITCHING FREQ-MAX, PDSO28
封裝: 0.150 INCH, LEAD FREE, PLASTIC, SSOP-28
文件頁數(shù): 23/30頁
文件大?。?/td> 384K
代理商: LTC3788IGN-1#PBF
LTC3788-1
3
37881fb
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at TA = 25°C, VBIAS = 12V, unless otherwise noted (Note 2).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VLOADREG
Output Voltage Load Regulation
(Note 4)
Measured in Servo Loop;
ITH Voltage = 1.2V to 0.7V
l
0.01
0.1
%
Measured in Servo Loop;
ITH Voltage = 1.2V to 2V
l
–0.01
–0.1
%
gm1,2
Error Amplifier Transconductance
ITH = 1.2V
2
mmho
IQ
Input DC Supply Current
(Note 5)
Pulse-Skipping or Forced Continuous Mode
(One Channel On)
RUN1 = 5V and RUN2 = 0V or RUN1 = 0V
and RUN2 = 5V; VFB1(2) = 1.25V (No Load)
0.9
mA
Pulse-Skipping or Forced Continuous Mode
(Both Channels On)
RUN1,2 = 5V; VFB1,2 = 1.25V (No Load)
1.2
mA
Sleep Mode
(One Channel On)
RUN1 = 5V and RUN2 = 0V or RUN1 = 0V
and RUN2 = 5V; VFB1(2) = 1.25V (No Load)
125
190
A
Sleep Mode
(Both Channels On)
RUN1,2 = 5V; VFB1,2 = 1.25V (No Load)
200
300
A
Shutdown
RUN1,2 = 0V
8
20
A
UVLO
INTVCC Undervoltage Lockout Thresholds
VINTVCC Ramping Up
l
4.1
4.3
V
VINTVCC Ramping Down
l
3.6
3.8
V
VRUN1,2
RUN Pin On Threshold
VRUN Rising
l
1.18
1.28
1.38
V
VRUNHYS
RUN Pin Hysteresis
100
mV
IRUN1,2
RUN Pin Hysteresis Current
VRUN > 1.28V
4.5
A
IRUN1,2
RUN Pin Current
VRUN < 1.28V
0.5
A
ISS1,2
Soft-Start Charge Current
VSS = GND
10
A
VSENSE(MAX)
Maximum Current Sense Threshold
VFB = 1.1V
l
68
75
82
mV
VSENSE(CM)
SENSE Pins Common Mode Range (BOOST
Converter Input Supply Voltage VIN)
2.5
38
V
ISENSE1,2+
SENSE+ Pin Current
VFB = 1.1V
200
300
A
ISENSE1,2–
SENSEPin Current
VFB = 1.1V
±1
A
tr(TG1,2)
Top Gate Rise Time
CLOAD = 3300pF (Note 6)
20
ns
tf(TG1,2)
Top Gate Fall Time
CLOAD = 3300pF (Note 6)
20
ns
tr(BG1,2)
Bottom Gate Rise Time
CLOAD = 3300pF (Note 6)
20
ns
tf(BG1,2)
Bottom Gate Fall Time
CLOAD = 3300pF (Note 6)
20
ns
RUP(TG1,2)
Top Gate Pull-Up Resistance
1.2
Ω
RDN(TG1,2)
Top Gate Pull-Down Resistance
1.2
Ω
RUP(TG1,2)
Bottom Gate Pull-Up Resistance
1.2
Ω
RDN(TG1,2)
Bottom Gate Pull-Down Resistance
1.2
Ω
tD(TG/BG)
Top Gate Off to Bottom Gate On
Switch-On Delay Time
CLOAD = 3300pF (Each Driver)
70
ns
tD(BG/TG)
Bottom Gate Off to Top Gate On
Switch-On Delay Time
CLOAD = 3300pF (Each Driver)
70
ns
DFMAX(BG1,2)
Maximum BG Duty Factor
96
%
tON(MIN)
Minimum BG On-Time
(Note 7)
110
ns
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