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LM25007 bảng dữ liệu(PDF) 4 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  42V, 0.5A Step-Down Switching Regulator
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LM25007 bảng dữ liệu(HTML) 4 Page - Texas Instruments

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LM25007
SNVS401B – JANUARY 2006 – REVISED FEBRUARY 2008
www.ti.com
Electrical Characteristics
(1)
Specifications with standard type are for TJ = 25°C only; limits in boldface type apply over the full Operating Junction
Temperature (TJ) range. Minimum and Maximum limits are guaranteed 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, RON = 200kΩ. .
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Startup Regulator
VCC Reg
VCC Regulator Output
6.6
7
7.4
V
VCC Current Limit
(2)
11
mA
VCC Supply
VCC undervoltage Lockout Voltage
6.3
V
(VCC increasing)
VCC Undervoltage Hysteresis
206
mV
VCC UVLO Delay (filter)
3
µs
Operating Current (ICC)
Non-Switching, FB = 3V
500
675
µA
Shutdown/Standby Current
RON/SD = 0V
70
150
µA
Switch Characteristics
Buck Switch Rds(on)
ITEST = 200mA,
0.74
1.34
VBST
−VSW = 6.3V
(3)
Gate Drive UVLO (VBST – VSW)
Rising
3.4
4.5
5.5
V
Gate Drive UVLO Hysteresis
400
mV
Current Limit
Current Limit Threshold
535
725
900
mA
Current Limit Response Time
Iswitch Overdrive = 0.1A Time
225
ns
to Switch Off
OFF time generator (test 1)
FB=0V, RCL = 100K
17
µs
OFF time generator (test 2)
FB=2.3V, RCL = 100K
2.65
µs
On Time Generator
TON -1
Vin = 10V
2.15
2.77
3.5
µs
Ron = 200K
TON -2
Vin = 40V
450
615
810
ns
Ron = 200K
Remote Shutdown Threshold
Rising
0.45
0.7
1.1
V
Remote Shutdown Hysteresis
40
mV
Minimum Off Time
Minimum Off Timer
FB = 0V
300
ns
Regulation and OV Comparators
FB Reference Threshold
Internal reference
2.445
2.5
2.550
V
Trip point for switch ON
FB Over-Voltage Threshold
Trip point for switch OFF
2.875
V
FB Bias Current
100
nA
Thermal Shutdown
Tsd
Thermal Shutdown Temp.
165
°C
Thermal Shutdown Hysteresis
25
°C
Thermal Resistance
θJA
Junction to Ambient
MUA Package
200
°C/W
SDC Package
40
°C/W
(1)
All limits are guaranteed. All electrical characteristics having room temperature limits are tested during production with TA = TJ = 25°C.
All hot and cold limits are guaranteed by correlating the electrical characteristics to process and temperature variations and applying
statistical process control.
(2)
The VCC output is intended as a self bias for the internal gate drive power and control circuits. Device thermal limitations limit external
loading.
(3)
For devices procured in the LLP-8 package the Rds(on) limits are guaranteed by design characterization data only.
4
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Copyright © 2006–2008, Texas Instruments Incorporated
Product Folder Links: LM25007


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