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参数资料
| 型号： | LTC3615EUF#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PQCC24 |
| 封装： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD, QFN-24 |
| 文件页数： | 23/32页 |
| 文件大小： | 585K |
| 代理商： | LTC3615EUF#PBF |
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LTC3615/LTC3615-1
3
3615fa
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN
Operating Voltage Range
l
2.25
5.5
V
VUVLO
Undervoltage Lockout Threshold
SVIN Ramping Down
l
1.7
V
SVIN Ramping Up
2.25
V
VFB
Feedback Voltage Internal Reference
(Note 3) VTRACK = SVIN, VSRLIM = 0V
0°C < TJ < 85°C
–40°C < TJ < 125°C
l
0.592
0.590
0.6
0.608
0.610
V
Feedback Voltage External Reference
(Note 7)
(Note 3) VTRACK = 0.3V, VSRLIM = SVIN
0.289
0.3
0.311
V
(Note 3) VTRACK = 0.5V, VSRLIM = SVIN
0.489
0.5
0.511
V
IFB
Feedback Input Current
VFBx = 0.6V
l
0
±30
nA
ΔVLINEREG
Line Regulation
SVIN = PVINx = 2.25V to 5.5V (Note 4)
l
0.2
%/ V
ΔVLOADREG
Load Regulation
VITHx from 0.5V to 0.9V (Note 4)
VITHx = SVIN, VFBx = 0.6V (Note 5)
0.2
2
%
IS
Active Mode
VFB1 = 0.5V, VMODE = SVIN, VRUN2 = 0V (Note 6)
1100
μA
VFBx = 0.5V, VMODE = SVIN, VRUNx = SVIN (Note 6)
1900
μA
Sleep Mode
VFB1 = 0.7V, VRUN1 = SVIN, VRUN2 = 0V,
VMODE = 0V, VITH1 = SVIN (Note 5)
95
130
μA
VFBx = 0.7V, VRUN1 = SVIN, VRUN2 = 0V,
VMODE = 0V (Note 4)
145
220
μA
VFBx = 0.7V, VRUNx = SVIN, VMODE =0V,
VITHx = SVIN (Note 5)
130
200
μA
VFBx = 0.7V, VRUNx = SVIN, VMODE =0V,
ITH = (Note 4)
240
360
μA
Shutdown
SVIN = PVIN = 5.5V, VRUNx = 0V
0.1
1
μA
RDS(ON)
Top Switch On-Resistance
PVINx = 3.3V (Note 10)
75
mΩ
Bottom Switch On-Resistance
PVINx = 3.3V (Note 10)
55
mΩ
ILIM
Top Switch Current Limit
Sourcing (Note 8), VFB = 0.5V
Duty Cycle <35%
Duty Cycle = 100%
4.5
3.6
6
7.5
A
Bottom Switch Current Limit
Sinking (Note 8), VFB = 0.7V,
Forced Continuous Mode
–2.5
–3.5
–5
A
ISW(LKG)
Switch Leakage Current
SVIN = PVIN = 5.5V, VRUNx = 0V
0.01
1
μA
gm(EA)
Error Amplier Transconductance
–5μA < ITH < 5μA
240
μmho
IEAO
Error Amplier Output Current
(Note 4)
±30
μA
tSOFT-START
Internal Soft-Start Time
VFBx from 0.06V to 0.54V, TRACK/SSx = SVIN
0.65
1.1
1.7
ms
RON(TRACK/SS_DIS) TRACK/SS Pull-Down Resistance at
Start-Up
200
Ω
tTRACK/SS_DIS
Soft-Start Discharge Time at Start-Up
70
μs
fOSC
Internal Oscillator Frequency
RRT/SYNC = 178k
l
1.85
2.25
2.65
MHz
VRT/SYNC = SVIN
l
1.8
2.25
2.7
MHz
fSYNC
Synchronization Frequency
tLOW, tHIGH > 30ns
0.4
4
MHz
VRT/SYNC
SYNC Level High
1.2
V
SYNC Level Low
0.3
V
The
l denotes the specications which apply over the full operating
junction temperature range, otherwise specications are at TA = 25°C (Note 2), SVIN = PVINx = 3.3V, RT = 178k, RSRLIM = 40.2k, unless
otherwise specied (Note 2).
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