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LMR14020SSQDDARQ1 Datasheet(PDF) 5 Page - Texas Instruments

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No. de pieza LMR14020SSQDDARQ1
Descripción Electrónicos  LMR14020-Q1 SIMPLE SWITCHER짰 40 V, 2 A Step-Down Converter with 40 關A IQ
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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LMR14020-Q1
www.ti.com
SNVSAG4A – NOVEMBER 2015 – REVISED JULY 2016
Product Folder Links: LMR14020-Q1
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Copyright © 2015–2016, Texas Instruments Incorporated
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report, SPRA953.
(2)
Power rating at a specific ambient temperature TA should be determined with a maximum junction temperature (TJ) of 125°C, which is
illustrated in Recommended Operating Conditions section.
6.4 Thermal Information
THERMAL METRIC (1) (2)
LMR14020-Q1
UNIT
DDA (HSOIC)
DPR (WSON)
8 PINS
10 PINS
RθJA
Junction-to-ambient thermal resistance
42.5
36.5
°C/W
ψJT
Junction-to-top characterization parameter
9.9
0.3
°C/W
ψJB
Junction-to-board characterization parameter
25.4
13.8
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
56.1
35.2
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
3.8
3.1
°C/W
RθJB
Junction-to-board thermal resistance
25.5
13.6
°C/W
6.5 Electrical Characteristics
Limits apply over the recommended operating junction temperature (TJ) range of -40°C to +125°C, unless otherwise stated.
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 specified, the following
conditions apply: VIN = 4.0 V to 40 V
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
POWER SUPPLY (VIN PIN)
VIN
Operation input voltage
4
40
V
UVLO
Under voltage lockout thresholds
Rising threshold
3.5
3.7
3.9
V
Hysteresis
285
mV
ISHDN
Shutdown supply current
VEN = 0 V, TJ = 25 °C, 4.0 V ≤ VIN ≤ 40 V
1.0
3.0
μA
IQ
Operating quiescent current (non-
switching)
VFB = 1.0 V, TJ = 25 °C
40
μA
ENABLE (EN PIN)
VEN_TH
EN Threshold Voltage
1.05
1.20
1.38
V
IEN_PIN
EN PIN current
Enable threshold +50 mV
-4.6
μA
Enable threshold -50 mV
-1.0
IEN_HYS
EN hysteresis current
-3.6
μA
EXTERNAL SOFT-START
ISS
SS pin current
TJ = 25 °C
-3.0
μA
POWER GOOD (PGOOD PIN)
VPG_UV
Power-good flag under voltage tripping
threshold
POWER GOOD (% of FB voltage)
94%
POWER BAD (% of FB voltage)
92%
VPG_OV
Power-good flag over voltage tripping
threshold
POWER BAD (% of FB voltage)
109%
POWER GOOD (% of FB voltage)
107%
VPG_HYS
Power-good flag recovery hysteresis
% of FB voltage
2%
IPG
PGOOD leakage current at high level
output
VPull-Up = 5 V
10
200
nA
VPG_LOW
PGOOD low level output voltage
IPull-Up = 1 mA
0.1
V
VIN_PG_MIN
Minimum VIN for valid PGOOD output
VPull-Up < 5 V at IPull-Up = 100 μA
1.6
1.95
V
VOLTAGE REFERENCE (FB PIN)
VFB
Feedback voltage
TJ = 25 °C
0.744
0.750
0.756
V
TJ = -40 °C to 125 °C
0.735
0.750
0.765
V
HIGH-SIDE MOSFET
RDS_ON
On-resistance
VIN = 12 V, BOOT to SW = 5.8 V
90
180
m


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