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参数资料
| 型号： | LTC3615EUF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/32页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3A DL 24QFN |
| 标准包装： | 91 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.25 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 400kHz ~ 4MHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
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LTC3615/LTC3615-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T A = 25°C (Note 2), SV IN = PV INx = 3.3V, R T = 178k, R SRLIM = 40.2k, unless
otherwise specified.
SYMBOL
V IN
V UVLO
PARAMETER
Operating Voltage Range
Undervoltage Lockout Threshold
CONDITIONS
SV IN Ramping Down
l
l
MIN
2.25
1.7
TYP
MAX
5.5
UNITS
V
V
SV IN Ramping Up
2.25
V
V FB
I FB
?V LINEREG
Feedback Voltage Internal Reference
Feedback Voltage External Reference
(Note 7)
Feedback Input Current
Line Regulation
(Note 3) V TRACK = SV IN , V SRLIM = 0V
0°C < T J < 85°C
–40°C < T J < 125°C
–55°C < T J < 150°C
(Note 3) V TRACK = 0.3V, V SRLIM = SV IN
(Note 3) V TRACK = 0.5V, V SRLIM = SV IN
V FBx = 0.6V
SV IN = PV INx = 2.25V to 5.5V (Note 4)
l
l
l
l
0.592
0.590
0.588
0.289
0.489
0.6
0.3
0.5
0
0.608
0.610
0.612
0.311
0.511
±30
0.2
V
V
V
V
V
nA
%/ V
?V LOADREG
I S
Load Regulation
Active Mode
V ITHx from 0.5V to 0.9V (Note 4)
V ITHx = SV IN , V FBx = 0.6V (Note 5)
V FB1 = 0.5V, V MODE = SV IN , V RUN2 = 0V (Note 6)
V FBx = 0.5V, V MODE = SV IN , V RUNx = SV IN (Note
6)
1100
1900
0.2
2
%
%
μA
μA
Sleep Mode
Shutdown
V FB1 = 0.7V, V RUN1 = SV IN , V RUN2 = 0V,
V MODE = 0V, V ITH1 = SV IN (Note 5)
V FBx = 0.7V, V RUN1 = SV IN , V RUN2 = 0V,
V MODE = 0V (Note 4)
V FBx = 0.7V, V RUNx = SV IN , V MODE =0V,
V ITHx = SV IN (Note 5)
V FBx = 0.7V, V RUNx = SV IN , V MODE =0V,
I TH = (Note 4)
SV IN = PV IN = 5.5V, V RUNx = 0V
95
145
130
240
0.1
130
220
200
360
1
μA
μA
μA
μA
μA
R DS(ON)
Top Switch On-Resistance
Bottom Switch On-Resistance
PV INx = 3.3V (Note 10)
PV INx = 3.3V (Note 10)
75
55
mΩ
mΩ
I LIM
I SW(LKG)
g m(EA)
I EA
t SOFT-START
Top Switch Current Limit
Bottom Switch Current Limit
Switch Leakage Current
Error Amplifier Transconductance
Error Amplifier Output Current
Internal Soft-Start Time
Sourcing (Note 8), V FB = 0.5V
Duty Cycle <35%
Duty Cycle = 100%
Sinking (Note 8), V FB = 0.7V,
Forced Continuous Mode
SV IN = PV IN = 5.5V, V RUNx = 0V
–5μA < I TH < 5μA
(Note 4)
V FBx from 0.06V to 0.54V, TRACK/SSx = SV IN
4.5
3.6
–2.5
0.65
6
–3.5
0.01
240
±30
1.1
7.5
–5
1
1.7
A
A
A
μA
μmho
μA
ms
R DIS
t DIS
TRACK/SS Pull-Down Resistance at
Start-Up
Soft-Start Discharge Time at Start-Up
70
200
Ω
μs
f OSC
f SYNC
Internal Oscillator Frequency
Synchronization Frequency
R RT/SYNC = 178k
V RT/SYNC = SV IN
t LOW , t HIGH > 30ns
l
l
1.85
1.8
0.4
2.25
2.25
2.65
2.7
4
MHz
MHz
MHz
3
V RT/SYNC
SYNC Level High
SYNC Level Low
For more information www.linear.com/LTC3615
1.2
0.3
V
V
3615fb
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