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LM3402MM 数据表(PDF) 5 Page - Texas Instruments

部件名 LM3402MM
功能描述  0.5A Constant Current Buck Regulator
Download  39 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM3402MM 数据表(HTML) 5 Page - Texas Instruments

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LM3402, LM3402HV
www.ti.com
SNVS450F – SEPTEMBER 2006 – REVISED OCTOBER 2015
6.4 Thermal Information
LM3402, LM3402HV
THERMAL METRIC(1)
DDA (HSOP)
DGK (VSSOP)
UNIT
8 PINS
8 PINS
RθJA
Junction-to-ambient thermal resistance
45.6
154.4
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
53.1
48.2
°C/W
RθJB
Junction-to-board thermal resistance
25.8
74.2
°C/W
ψJT
Junction-to-top characterization parameter
7.6
4.3
°C/W
ψJB
Junction-to-board characterization parameter
25.7
72.9
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
3.2
N/A
°C/W
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report, SPRA953.
6.5 Electrical Characteristics
VIN = 24 V unless otherwise indicated. Typical values apply over –40°C ≤ TJ ≤ 125°C; minimum and maximum values apply
over the full operating temperature range
(1)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
REGULATION AND OVERVOLTAGE COMPARATORS
VREF-REG
CS Regulation Threshold
CS Decreasing, SW turns on
194
200
206
mV
VREF-0V
CS Overvoltage Threshold
CS Increasing, SW turns off
300
mV
ICS
CS Bias Current
CS = 0 V
0.1
µA
SHUTDOWN
VSD-TH
Shutdown Threshold
RON / SD Increasing
0.3
0.7
1.05
V
VSD-HYS
Shutdown Hysteresis
RON / SD Decreasing
40
mV
OFF TIMER
tOFF-MIN
Minimum OFF-time
CS = 0 V
300
ns
INTERNAL REGULATOR
VCC-REG
VCC Regulated Output
6.6
7
7.4
V
VIN-DO
VIN - VCC Dropout
ICC = 5 mA, 6 V < VIN < 8 V
300
mV
VCC-BP-TH
VCC Bypass Threshold
VIN Increasing
8.8
V
VCC-BP-HYS
VCC Bypass Hysteresis
VIN Decreasing
225
mV
VCC-Z-6
VIN = 6 V
55
Ω
VCC Output Impedance
VCC-Z-8
VIN = 8 V
50
(0 mA < ICC < 5 mA)
VCC-Z-24
VIN = 24 V
0.4
VCC-LIM
VCC Current Limit
(2)
VIN = 24 V, VCC = 0 V
16
mA
VCC Undervoltage Lock-out
VCC-UV-TH
VCC Increasing
5.25
V
Threshold
VCC Undervoltage Lock-out
VCC-UV-HYS
VCC Decreasing
150
mV
Hysteresis
VCC Undervoltage Lock-out Filter
VCC-UV-DLY
100-mV Overdrive
3
µs
Delay
IIN-OP
IIN Operating Current
Non-switching, CS = 0 V
600
900
µA
IIN-SD
IIN Shutdown Current
RON / SD = 0 V
90
180
µA
CURRENT LIMIT
ILIM
Current Limit Threshold
530
735
940
mA
DIM COMPARATOR
VIH
Logic High
DIM Increasing
2.2
V
VIL
Logic Low
DIM Decreasing
0.8
V
IDIM-PU
DIM Pullup Current
DIM = 1.5 V
75
µA
(1)
Typical specifications represent the most likely parametric norm at 25°C operation.
(2)
VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading.
Copyright © 2006–2015, Texas Instruments Incorporated
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Product Folder Links: LM3402 LM3402HV


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