參數(shù)資料
型號: LTC3851AEMSE-1#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 0.05 A SWITCHING CONTROLLER, 810 kHz SWITCHING FREQ-MAX, PDSO16
封裝: LEAD FREE, PLASTIC, MSOP-16
文件頁數(shù): 23/30頁
文件大?。?/td> 0K
代理商: LTC3851AEMSE-1#PBF
LTC3851A-1
3
3851a1fa
elecTrical characTerisTics
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Main Control Loops
VIN
Input Operating Voltage Range
4
38
V
VFB
Regulated Feedback Voltage
ITH = 1.2V (Note 4) 0°C to 85°C
ITH = 1.2V (Note 4) –40°C to 125°C
ITH = 1.2V (Note 4) –40°C to 150°C
ITH = 1.2V (Note 4) –55°C to 150°C
l
0.792
0.788
0.800
0.808
0.812
V
IFB
Feedback Current
(Note 4)
–10
–50
nA
VREFLNREG
Reference Voltage Line Regulation
VIN = 6V to 38V (Note 4)
0.002
0.02
%/V
VLOADREG
Output Voltage Load Regulation
(Note 4) Measured in Servo Loop,
ITH = 1.2V to 0.7V
(Note 4) Measured in Servo Loop,
ITH = 1.2V to 0.7V (H-Grade, MP-Grade)
l
0.01
0.1
0.2
%
(Note 4) Measured in Servo Loop,
ITH = 1.2V to 1.6V
(Note 4) Measured in Servo Loop,
ITH = 1.2V to 1.6V (H-Grade, MP-Grade)
l
–0.01
–0.1
–0.2
%
gm
Transconductance Amplifier gm
ITH = 1.2V, Sink/Source = 5A (Note 4)
2
mmho
gm GBW
Transconductance Amp Gain Bandwidth ITH = 1.2V (Note 8)
3
MHz
IQ
Input DC Supply Current
Normal Mode
Shutdown
(Note 5)
VRUN = 5V
VRUN = 0V
1
25
50
mA
A
UVLO
Undervoltage Lockout on INTVCC
VINTVCC Ramping Down
3.25
V
UVLO Hys
UVLO Hysteresis
0.4
V
ISENSE
SENSE Pins Current
±1
±2
A
ITK/SS
Soft-Start Charge Current
VTK/SS = 0V
0.6
1
2
A
VRUN
RUN Pin On—Threshold
VRUN Rising
l
1.10
1.22
1.35
V
VRUNHYS
RUN Pin On—Hysteresis
120
mV
VSENSE(MAX) Maximum Current Sense Threshold
VFB = 0.7V, VSENSE = 3.3V
VFB = 0.7V, VSENSE = 3.3V (H-Grade, MP-Grade)
l
40
35
53
65
70
mV
TG RUP
TG Driver Pull-Up On-Resistance
TG High
2.2
Ω
TG RDOWN
TG Driver Pull-Down On-Resistance
TG Low
1.2
Ω
BG RUP
BG Driver Pull-Up On-Resistance
BG High
2.1
Ω
BG RDOWN
BG Driver Pull-Down On-Resistance
BG Low
1.1
Ω
TG tr
TG tf
TG Transition Time
Rise Time
Fall Time
(Note 6)
CLOAD = 3300pF
25
ns
BG tr
BG tf
BG Transition Time
Rise Time
Fall Time
(Note 6)
CLOAD = 3300pF
25
ns
TG/BG t1D
Top Gate Off to Bottom Gate On Delay
Bottom Switch-On Delay Time
CLOAD = 3300pF Each Driver
(Note 6)
30
ns
BG/TG t2D
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
CLOAD = 3300pF Each Driver
(Note 6)
30
ns
tON(MIN)
Minimum On-Time
(Note 7)
90
ns
INTVCC Linear Regulator
VINTVCC
Internal VCC Voltage
6V < VIN < 38V
4.8
5
5.2
V
VLDO INT
INTVCC Load Regulation
ICC = 0mA to 50mA
0.5
%
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 15V, VRUN = 5V unless otherwise noted.
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