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LM5575QMHX/NOPB bảng dữ liệu(PDF) 5 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  LM5575-Q1 Simple Switcher짰 75-V, 1.5-A Step-Down Switching Regulator
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LM5575QMHX/NOPB bảng dữ liệu(HTML) 5 Page - Texas Instruments

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LM5575-Q1
www.ti.com
SNOSB23C – OCTOBER 2008 – REVISED DECEMBER 2014
7.4 Thermal Information
LM5575-Q1
THERMAL METRIC(1)
PWP
UNIT
16 PINS
RθJA
Junction-to-ambient thermal resistance
50
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
14
(1)
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
7.5 Electrical Characteristics
Specifications with standard typeface are for TJ = 25°C. VIN = 48V, RT = 32.4 kΩ unless otherwise stated.
(1)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
STARTUP REGULATOR
7.15
V
VccReg
VCC Regulator Output
Over full Operating Junction
6.85
7.5
Temperature range
VCC LDO Mode turn-off
9
V
VCC Current Limit
VCC = 0 V
25
mA
VCC SUPPLY
(VCC increasing)
5.35
V
VCC UVLO Threshold
Over full Operating Junction
5.01
5.69
Temperature range
VCC Undervoltage Hysteresis
0.35
V
FB = 1.3 V
3.7
mA
Bias Current (Iin)
Over full Operating Junction
4.5
Temperature range
SD = 0 V
57
µA
Shutdown Current (Iin)
Over full Operating Junction
85
Temperature range
SHUTDOWN THRESHOLDS
(SD Increasing)
0.7
V
Shutdown Threshold
Over full Operating Junction
0.43
0.9
Temperature range
Shutdown Hysteresis
0.1
V
(Standby Increasing)
1.225
V
Standby Threshold
Over full Operating Junction
1.15
1.30
Temperature range
Standby Hysteresis
0.1
V
SD Pullup Current Source
5
µA
SWITCH CHARACTERISTICS
330
m
Buck Switch Rds(on)
Over full Operating Junction
760
Temperature range
BOOST UVLO
4
V
BOOST UVLO Hysteresis
0.56
V
Pre-charge Switch Rds(on)
70
Pre-charge Switch on-time
250
ns
CURRENT LIMIT
RAMP = 0 V
2.1
A
Cycle by Cycle Current Limit
Over full Operating Junction
1.8
2.7
Temperature range
(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 Average Outgoing Quality Level (AOQL).
Copyright © 2008–2014, Texas Instruments Incorporated
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