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LM25010 Arkusz danych(PDF) 4 Page - Texas Instruments

Numer części LM25010
Szczegółowy opis  LM25010/LM25010Q 42V, 1.0A Step-Down Switching Regulator
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Producent  TI [Texas Instruments]
Strona internetowa  http://www.ti.com
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LM25010 Arkusz danych(HTML) 4 Page - Texas Instruments

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LM25010
SNVS419D – DECEMBER 2005 – REVISED FEBRUARY 2013
www.ti.com
Electrical Characteristics
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. See
(1).
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
VCC Regulator
VCCReg
VCC regulated output
6.6
7
7.4
V
VIN – VCC
ICC = 0 mA, FS ≤ 200 kHz, 6.0V ≤ VIN ≤ 8.5V
100
mV
VCC bypass threshold
VIN increasing
8.9
V
VCC bypass hysteresis
VIN decreasing
260
mV
VCC output impedance
VIN = 6.0V
55
(0 mA
≤ ICC ≤ 5 mA)
VIN = 8.0V
50
VIN = 24V
0.21
VCC current limit (Note 3)
VIN = 24V, VCC = 0V
15
mA
UVLOVcc
VCC under-voltage lock-out
VCC increasing
5.25
V
threshold
UVLOVCC hysteresis
VCC decreasing
180
mV
UVLOVCC filter delay
100 mV overdrive
3
µs
IIN operating current
Non-switching, FB = 3V
645
920
µA
IIN shutdown current
RON/SD = 0V
90
170
µA
Switch Characteristics
RDS(on)
Buck switch RDS(on) @ fSW = 200
TJ ≤ 125°C
0.35
0.80
mA
TJ ≤ 150°C
0.85
UVLOGD
Gate drive UVLO
VBST – VSW increasing
1.7
3.0
4.0
V
UVLOGD hysteresis
400
mV
SOFT-START Pin
ISS
Internal current source
8.0
11.5
15
µA
Current Limit
ILIM
Threshold
Current out of ISEN
1
1.25
1.5
A
Resistance from ISEN to SGND
130
m
Response time
150
ns
On Timer, RON/SD Pin
tON – 1
On-time
VIN = 10V, RON = 200 kΩ
2.1
2.75
3.4
µs
tON – 2
On-time
VIN = 42V, RON = 200 kΩ
500
695
890
ns
Shutdown threshold
Voltage at RON/SD rising
0.30
0.7
1.05
V
Threshold hysteresis
40
mV
Off Timer
tOFF
Minimum off-time
260
ns
Regulation and Over-Voltage Comparators (FB Pin)
VREF
FB regulation threshold
TJ ≤ 125°C
2.445
2.50
2.550
V
TJ ≤ 150°C
2.435
FB over-voltage threshold
2.9
V
FB bias current
1
nA
Thermal Shutdown
TSD
Thermal shutdown temperature
175
°C
Thermal shutdown hysteresis
20
°C
Thermal Resistance
θJA
Junction to ambient, 0 LFPM air
DPR0010A Package
40
°C/W
flow
PWP0014A Package
40
(1)
Typical specifications represent the most likely parametric norm at 25°C operation.
4
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