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LM25085A データシート(PDF) 3 Page - Texas Instruments

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部品番号 LM25085A
部品情報  42V Constant On-Time PFET Buck Switching Controller
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

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LM25085A
www.ti.com
SNVS601B – JANUARY 2009 – 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 TI Sales Office/ Distributors for availability and specifications.
(3)
The human body model is a 100 pF capacitor discharged through a 1.5 k
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 = 100 kΩ.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
VIN Pin
IIN
Operating current
Non-switching, FB = 1.05V (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 = 1.05V, ICC = 0 mA
6.9
7.7
8.5
V
Vin = 9V, FB = 1.05V, ICC = 20 mA
7.7
V
Vin = 42V, FB = 1.05V, ICC = 0 mA
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 = 1.05V
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 = 500 mA
2.3
Sink current = 500 mA
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 © 2009–2013, Texas Instruments Incorporated
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