LTC4220 查看數據表（PDF） - Linear Technology
零件编号
产品描述 (功能)
生产厂家
LTC4220 Datasheet PDF : 36 Pages
| |||
LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
SYMBOL PARAMETER
CONDITIONS
LTC4252-1/-2
LTC4252A-1/-2
MIN TYP MAX MIN TYP MAX UNITS
VZ
VIN – VEE Zener Voltage
IIN = 2mA
l 11.5 13 14.5 11.5 13 14.5
V
rZ
VIN – VEE Zener Dynamic Impedance
IIN = 2mA to 30mA
IIN
VIN Supply Current
UV = OV = 4V, VIN = (VZ – 0.3V)
●
VLKO
VIN Undervoltage Lockout
Coming Out of UVLO (Rising VIN) ●
5
0.8 2
9.2 11.5
5
Ω
0.9 2
mA
9 10
V
VLKH
VIN Undervoltage Lockout Hysteresis
VCB
Circuit Breaker Current Limit Voltage
VCB = (VSENSE – VEE)
VACL
Analog Current Limit Voltage
VACL = (VSENSE – VEE),
SS = Open or 2.2V
1
0.5
V
● 40 50 60 45 50 55
mV
● 80 100 120
mV
VACL/
VCB
VFCL
Analog Current Limit Voltage/
Circuit Breaker Voltage
Fast Current Limit Voltage
VACL = (VSENSE – VEE),
SS = Open or 1.4V
VFCL = (VSENSE – VEE)
●
1.05 1.20 1.38 V/V
● 150 200 300 150 200 300
mV
VSS
SS Voltage
After End of SS Timing Cycle
2.2
1.4
V
RSS
SS Output Impedance
100
50
kΩ
ISS
SS Pin Current
UV = OV = 4V, VSENSE = VEE,
VSS = 0V (Sourcing)
22
28
μA
UV = OV = 0V, VSENSE = VEE,
VSS = 2V (Sinking)
28
28
mA
VOS
Analog Current Limit Offset Voltage
10
10
mV
VACL+VOS/ Ratio (VACL + VOS) to SS Voltage
VSS
IGATE
GATE Pin Output Current
UV = OV = 4V, VSENSE = VEE,
VGATE = 0V (Sourcing)
0.05
0.05
V/V
● 40 58 80 40 58 80
μA
UV = OV = 4V, VSENSE – VEE = 0.15V,
17
VGATE = 3V (Sinking)
17
mA
VGATE
External MOSFET Gate Drive
UV = OV = 4V, VSENSE – VEE = 0.3V,
190
VGATE = 1V (Sinking)
190
mA
VGATE – VEE, IIN = 2mA
● 10 12 VZ 10 12 VZ
V
VGATEH Gate High Threshold
fVoGrAPTEWHR=GVDINS–taVtuGsAT(EM, SIINO=nl2ym) A,
2.8
2.8
V
VGATEL
VUVHI
VUVLO
VUV
VUVHST
VOVHI
VOVLO
VOV
VOVHST
ISENSE
IINP
VTMRH
VTMRL
Gate Low Threshold
UV Pin Threshold HIGH
UV Pin Threshold LOW
UV Pin Threshold
UV Pin Hysteresis
OV Pin Threshold HIGH
OV Pin Threshold LOW
OV Pin Threshold
OV Pin Hysteresis
SENSE Pin Input Current
UV, OV Pin Input Current
TIMER Pin Voltage High Threshold
TIMER Pin Voltage Low Threshold
(Before Gate Ramp-Up)
Low-to-High Transition
(● for LTC4252A Only)
Low-to-High Transition
(● for LTC4252A Only)
UV = OV = 4V, VSENSE = 50mV
UV = OV = 4V
0.5
0.5
V
● 3.075 3.225 3.375
V
● 2.775 2.925 3.075
V
●
3.05 3.08 3.11
V
●
300
292 324 356
mV
● 5.85 6.15 6.45
V
● 5.25 5.55 5.85
V
●
5.04 5.09 5.14
V
●
600
82 102 122
mV
●
–15 –30
–15 –30
μA
●
± 0.1 ±1
± 0.1 ±1
μA
4
4
V
1
1
V
425212fd
3
Share Link: 