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LM25085MME bảng dữ liệu(PDF) 3 Page - Texas Instruments

tên linh kiện LM25085MME
Giải thích chi tiết về linh kiện  LM25085, LM25085-Q1 42V Constant On-Time PFET Buck Switching Controller
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LM25085, LM25085-Q1
www.ti.com
SNVS593H – OCTOBER 2008 – REVISED MARCH 2013
Absolute Maximum Ratings
(1) (2)
VIN to GND
-0.3V to 45V
ISEN to GND
-0.3V to VIN + 0.3V
ADJ to GND
-0.3V to VIN + 0.3V
RT, FB to GND
-0.3V to 7V
VIN to VCC, VIN to PGATE
-0.3V to 10V
ESD Rating (3)
Human Body Model
2kV
Storage Temperature Range
-65°C to +150°C
(1)
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics.
(2)
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3)
The human body model is a 100pF capacitor discharged through a 1.5k
Ω resistor into each pin.
Operating Ratings
(1)
VIN Voltage
4.5V to 42V
Junction Temperature
−40°C to + 125°C
(1)
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics.
Electrical Characteristics
Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C
to +125°C. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent
the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the
following conditions apply: VIN = 24V, RT = 100kΩ.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VIN Pin
IIN
Operating Current
Non-Switching, FB = 1.4V (1)
1.25
1.75
mA
IQ
Shutdown Current
RT = 0V (1)
175
300
µA
VCC Regulator(2)
VCC(reg)
VIN - VCC
Vin = 9V, FB = 1.4V, ICC = 0mA
6.9
7.7
8.5
V
Vin = 9V, FB = 1.4V, ICC = 20mA
7.7
V
Vin = 42V, FB = 1.4V, ICC = 0mA
7.7
V
UVLOVcc
VCC Under-Voltage Lock-Out
VCC Increasing
3.8
V
Threshold
UVLOVcc Hysteresis
VCC Decreasing
260
mV
VCC(CL)
VCC Current Limit
FB = 1.4V
20
40
mA
PGATE Pin
VPGATE(HI)
PGATE High Voltage
PGATE Pin = Open
VIN -0.1
VIN
V
VPGATE(LO)
PGATE Low Voltage
PGATE Pin = Open
VCC
VCC+0.1
V
VPGATE(HI)4.5
PGATE High Voltage at Vin = 4.5V
PGATE Pin = Open
VIN -0.1
VIN
V
VPGATE(LO)4.5
PGATE Low Voltage at Vin = 4.5V
PGATE Pin = Open
VCC
VCC+0.1
V
IPGATE
Driver Output Source Current
VIN = 12V, PGATE = VIN - 3.5V
1.75
A
Driver Output Sink Current
VIN = 12V, PGATE = VIN - 3.5V
1.5
A
RPGATE
Driver Output Resistance
Source current = 500mA
2.3
Sink current = 500mA
2.3
Current Limit Detection
IADJ
ADJUST Pin Current Source
VADJ = 22.5V
32
40
48
µA
VCL OFFSET
Current Limit Comparator Offset
VADJ = 22.5V, VADJ - VISEN
-9
0
9
mV
(1)
Operating current and shutdown current do not include the current in the RT resistor.
(2)
VCC provides self bias for the internal gate drive.
Copyright © 2008–2013, Texas Instruments Incorporated
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Product Folder Links: LM25085 LM25085-Q1


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