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LM22678QTJE-5.0 数据表(PDF) 3 Page - Texas Instruments

部件名 LM22678QTJE-5.0
功能描述  LM22678/LM22678Q 42V, 5A SIMPLE SWITCHER Step-Down Voltage Regulator with Features
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM22678QTJE-5.0 数据表(HTML) 3 Page - Texas Instruments

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LM22678
www.ti.com
SNVS585K – SEPTEMBER 2008 – REVISED MARCH 2013
Absolute Maximum Ratings
(1) (2)
VIN to GND
43V
EN Pin Voltage
-0.5V to 6V
SW to GND (3)
-5V to VIN
BOOT Pin Voltage
VSW + 7V
FB Pin Voltage
-0.5V to 7V
Power Dissipation
Internally Limited
Junction Temperature
150°C
For soldering specifications, refer to the following document: www.ti.com/lit/snoa549
ESD Rating (4)
Human Body Model
±2 kV
Storage Temperature Range
-65°C to +150°C
(1)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of
device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or
other conditions beyond those indicated in the recommended Operating Ratings is not implied. The recommended Operating Ratings
indicate conditions at which the device is functional and should not be operated beyond such conditions.
(2)
If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3)
The absolute maximum specification of the ‘SW to GND’ applies to DC voltage. An extended negative voltage limit of -10V applies to a
pulse of up to 50 ns.
(4)
ESD was applied using the human body model, a 100 pF capacitor discharged through a 1.5 k
Ω resistor into each pin.
Operating Ratings
(1)
Supply Voltage (VIN)
4.5V to 42V
Junction Temperature Range
-40°C to +125°C
(1)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of
device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or
other conditions beyond those indicated in the recommended Operating Ratings is not implied. The recommended Operating Ratings
indicate conditions at which the device is functional and should not be operated beyond such conditions.
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 ensured through test, design, or statistical correlation. Typical values represent
the most likely parametric norm at TA = TJ = 25°C, and are provided for reference purposes only. Unless otherwise specified:
VIN = 12V.
Min
Typ
Max
Parameter
Test Conditions
Units
(1)
(2)
(1)
LM22678-5.0
VFB
Feedback Voltage
VIN = 8V to 42V
4.925/4.9
5.0
5.075/5.1
V
LM22678-ADJ
VFB
Feedback Voltage
VIN = 4.7V to 42V
1.266/1.259
1.285
1.304/1.311
V
All Output Voltage Versions
IQ
Quiescent Current
VFB = 5V
3.4
6
mA
ISTDBY
Standby Quiescent Current
EN Pin = 0V
25
40
µA
ICL
Current Limit
6.0/5.75
7.1
8.4/8.75
A
IL
Output Leakage Current
VIN = 42V, EN Pin = 0V, VSW = 0V
0.2
2
µA
VSW = -1V
0.1
3
µA
RDS(ON)
Switch On-Resistance
0.1
0.14/0.2
fO
Oscillator Frequency
400
500
600
kHz
TOFFMIN
Minimum Off-time
100
200
300
ns
TONMIN
Minimum On-time
100
ns
(1)
Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation
using Statistical Quality Control (SQC) methods. Limits are used to calculate TI's Average Outgoing Quality Level (AOQL).
(2)
Typical values represent most likely parametric norms at the conditions specified and are not ensured.
Copyright © 2008–2013, Texas Instruments Incorporated
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