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LMR23615 データシート(PDF) 5 Page - Texas Instruments

部品番号 LMR23615
部品情報  SIMPLE SWITCHER 36-V, 1.5-A Synchronous Step-Down Converter
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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LMR23615 データシート(HTML) 5 Page - Texas Instruments

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LMR23615
www.ti.com
SNVSAV8A – JUNE 2017 – REVISED FEBRUARY 2018
Product Folder Links: LMR23615
Submit Documentation Feedback
Copyright © 2017–2018, Texas Instruments Incorporated
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
(2)
Determine power rating at a specific ambient temperature (TA) with a maximum junction temperature (TJ) of 125°C (see Recommended
Operating Conditions ).
6.4 Thermal Information
THERMAL METRIC(1)(2)
LMR23615
UNIT
DRR (WSON)
(12 PINS)
RθJA
Junction-to-ambient thermal resistance
41.5
°C/W
ψJT
Junction-to-top characterization parameter
0.3
°C/W
ψJB
Junction-to-board characterization parameter
16.5
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
39.1
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
3.4
°C/W
RθJB
Junction-to-board thermal resistance
16.3
°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.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
POWER SUPPLY (VIN PIN)
VIN
Operation input voltage
4
36
V
VIN_UVLO
Undervoltage lockout thresholds
Rising threshold
3.3
3.7
3.9
V
Falling threshold
2.9
3.3
3.5
ISHDN
Shutdown supply current
VEN = 0 V, VIN = 12 V, TJ = –40 °C to 125°C
2
4
μA
IQ
Operating quiescent current
(non- switching)
VIN =12 V, VFB = 1.2 V, TJ = –40 °C to
125°C, PFM mode
75
μA
ENABLE (EN/SYNC PIN)
VEN_H
Enable rising threshold voltage
1.4
1.55
1.7
V
VEN_HYS
Enable hysteresis voltage
0.4
V
VWAKE
Wake-up threshold
0.4
V
IEN
Input leakage current at EN pin
VIN = 4 V to 36 V, VEN= 2 V
10
100
nA
VIN = 4 V to 36 V, VEN= 36 V
1
μA
VOLTAGE REFERENCE (FB PIN)
VREF
Reference voltage
VIN = 4 V to 36 V, TJ = 25 °C
0.985
1
1.015
V
VIN = 4 V to 36 V, TJ = –40 °C to 125°C
0.980
1
1.020
ILKG_FB
Input leakage current at FB pin
VFB= 1 V
10
nA
INTERNAL LDO (VCC PIN)
VCC
Internal LDO output voltage
4.1
V
VCC_UVLO
VCC undervoltage lockout
thresholds
Rising threshold
2.8
3.2
3.6
V
Falling threshold
2.4
2.8
3.2
CURRENT LIMIT
IHS_LIMIT
Peak inductor current limit
2.9
3.9
4.9
A
ILS_LIMIT
Valley inductor current limit
1.9
2.5
3.2
A
IL_ZC
Zero cross current limit
–0.04
A
INTEGRATED MOSFETS
RDS_ON_HS
High-side MOSFET ON-
resistance
VIN = 12 V, IOUT = 1 A
160
m
RDS_ON_LS
Low-side MOSFET ON-
resistance
VIN = 12 V, IOUT = 1 A
95
m


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