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LTC3374A

更新时间： 2022-02-26 11:06:37
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
44页 5626K
描述
60V Low IQ Buck Controller Plus 4-Channel 8A Configurable Buck DC/DCs

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LTC3374A 数据手册

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LTC3372  
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating  
junction temperature range, otherwise specifications are at TA = 25°C (Note 2), VIN = 12V, VRUN = 5V, VOUT = VINA-H = 3.3V unless  
otherwise noted.  
SYMBOL  
PARAMETER  
CONDITIONS  
MIN  
TYP  
MAX UNITS  
High Voltage Buck Controller  
V
V
Regulated Output Voltage  
(Note 5) I = 0.7V to 2V  
OUT  
TH  
l
l
V
V
= INTV  
V = 6V to 60V  
4.875  
3.217  
5.000 5.125  
3.300 3.383  
V
V
OUTPRG  
OUTPRG  
CC, IN  
IN  
= GND, V = 4.5V to 60V  
RUN Pin Controller Enable Threshold  
RUN Pin Voltage Rising  
Hysteresis  
1.17  
1.22  
50  
1.27  
V
mV  
RUN  
I
RUN Pin Pull-Up Current  
RUN = 0V  
0.5  
2
μA  
mS  
μA  
μA  
mV  
%
RUN  
g
Error Amplifier Transconductance  
Soft-Start Charge Current  
(Note 5) ITH = 1.2V, Sink/Source 5μA  
TRACK/SS = 0V  
m
I
I
7
10  
14  
1
TRACK/SS  
+
+
SENSE Pin Current  
SENSE  
–
l
V
Maximum Current Sense Threshold  
Maximum Duty Cycle In Dropout  
SENSE = 3.3V  
68  
75  
98  
82  
SENSE(MAX)  
D
R
RT  
= 400k  
97.5  
MAX(HV)  
TG  
Top Gate Pull-Up On-Resistance  
Top Gate Pull-Down On-Resistance  
2.3  
1.5  
Ω
Ω
BG  
Bottom Gate Pull-Up On-Resistance  
Bottom Gate Pull-Down On-Resistance  
2.4  
1.1  
Ω
Ω
t
t
t
Delay Time, Top Gate Off to Bottom Gate On (Note 6)  
Delay Time, Bottom Gate Off to Top Gate On (Note 6)  
40  
18  
60  
0.2  
ns  
ns  
ns  
D(TG/BG)  
D(BG/TG)  
ON(MIN)  
Minimum On-Time (Top Gate)  
(Note 7)  
PGOOD  
PGOOD Pin Voltage When Low  
PGOOD Pin Leakage Current When High  
I
= 2mA  
0.4  
1
V
μA  
PGOOD  
PGOOD = 5V  
UV  
V
V
/EXTV Pin Undervoltage Threshold  
Falling, Relative to Regulated V  
Hysteresis  
–5  
+5  
–7.5  
2.5  
–10  
%
%
OUT  
OUT  
CC  
OUT  
OUT  
OUT  
OV  
/EXTV Pin Overvoltage Threshold  
Rising, Relative to Regulated V  
Hysteresis  
+7.5  
2.5  
+10  
%
%
CC  
–
SENSE Pin Overvoltage Threshold  
Rising, Relative to Regulated V  
Hysteresis  
+15  
2.5  
%
%
t
PGOOD Delay for Reporting OV/UV Fault  
PGOOD High to Low  
40  
μs  
PGOOD  
INTV  
No Load Internal V Regulated Voltage  
6V < V < 60V  
INTVCC  
V
V
= 3.3V  
= 5V  
4.9  
5.1  
–1  
5.3  
–2  
V
CC  
CC  
IN  
OUT  
OUT  
INTV Voltage Load Regulation  
I
= 0mA to 50mA  
%
CC  
5
–2.5  
V
Ω
No Load Internal V Voltage  
CC  
Source Resistance  
I
= 0mA to 50mA  
INTVCC  
V
V
Threshold for INTV Switchover from  
OUT  
V Rising  
OUT  
4.5  
3.6  
4.7  
4.9  
V
V
OUT  
IN  
CC  
to V  
Hysteresis  
0.25  
l
l
Undervoltage Lockout (UVLO) Threshold on INTV Voltage Rising  
INTV  
4.0  
3.8  
4.25  
4.0  
V
V
CC  
INTV Voltage Falling  
CC  
CC  
Internal Bias Start Up Time  
Oscillator and Phase-Locked Loop  
V
OUT  
= 0V  
1.2  
ms  
f
Frequency of Internal Oscillator  
(LV Regulators’ Switching Frequency)  
V
V
= INTV  
= INTV  
1.9  
1.75  
1.85  
2
2
2
2.1  
2.25  
2.15  
MHz  
MHz  
MHz  
OSC  
RT  
RT  
RT  
CC  
CC  
l
l
R
= 400k  
f
f
HV Controller Switching Frequency  
Synchronization Frequency Range  
1/6•f  
kHz  
SW  
OSC  
l
t , t > 60ns  
LOW HIGH  
1
3
MHz  
PLL/MODE  
l
l
V
PLL/MODE Level High  
PLL/MODE Level Low  
For Synchronization  
For Synchronization  
1.3  
V
V
PLL/MODE  
0.25  
825  
l
V
RT Servo Voltage  
R
RT  
= 400k  
770  
800  
mV  
RT  
Rev. A  
5
For more information www.analog.com  
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