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LM25119 Fiches technique(PDF) 6 Page - Texas Instruments

No de pièce LM25119
Description  Wide Input Range, Dual Synchronous Buck Controller
Download  39 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM25119 Fiches technique(HTML) 6 Page - Texas Instruments

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LM25119, LM25119-Q1
SNVS680H – AUGUST 2010 – REVISED MAY 2016
www.ti.com
Product Folder Links: LM25119
Submit Documentation Feedback
Copyright © 2010–2016, Texas Instruments Incorporated
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report, SPRA953.
6.5 Thermal Information
THERMAL METRIC(1)
LM25119, LM25119-Q1
UNIT
RTV (WQFN)
32 PINS
RθJA
Junction-to-ambient thermal resistance
36.7
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
20.9
°C/W
RθJB
Junction-to-board thermal resistance
9
°C/W
ψJT
Junction-to-top characterization parameter
0.2
°C/W
ψJB
Junction-to-board characterization parameter
8.9
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
2.2
°C/W
(1)
Minimum and Maximum limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through
correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Texas Instrument's Average Outgoing Quality
Level (AOQL).
(2)
Per VCC Regulator.
6.6 Electrical Characteristics
Typical values correspond to TJ = 25°C. Minimum and maximum limits apply over –40°C to 125°C junction temperature
range. VIN = 36 V, VCC = 8 V, VCCDIS = 0 V, EN2 = 5 V, RT = 25 kΩ, and no load on LO or HO (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN(1)
TYP
MAX(1)
UNIT
VIN SUPPLY
IBIAS
VIN operating current
SS1 = SS2 = 0 V
6
7.3
mA
VCCDIS = 2 V, SS1 = SS2 = 0 V
340
500
µA
IVCC
VCC1 operating current
VCCDIS = 2 V, SS1 = SS2 = 0 V
3.9
4.5
mA
VCC2 operating current
VCCDIS = 2 V, SS1 = SS2 = 0 V
1.4
2
mA
ISHUTDOWN
VIN shutdown current
UVLO = 0 V, SS1 = SS2 = 0 V
15
33
µA
VCC REGULATOR(2)
VCC(REG)
VCC regulation
6.77
7.6
8.34
V
VIN = 4.5 V, No external load
4.4
4.46
Sourcing current limit
VCC = 0 V
25
40
mA
VCCDIS switch threshold
VCCDIS rising
1.19
1.25
1.29
V
VCCDIS switch hysteresis
0.07
V
VCCDIS input current
VCCDIS = 0 V
–20
nA
Undervoltage threshold
Positive going VCC
3.8
4
4.2
V
Undervoltage hysteresis
0.2
V
EN2 INPUT
VIL
EN2 input low threshold
2
1.5
V
VIH
EN2 input high threshold
2.9
2.5
V
EN2 input pullup resistor
50
k
UVLO
Threshold
UVLO rising
1.2
1.25
1.29
V
Hysterisis current
UVLO = 1.4 V
15
20
25
µA
Shutdown threshold
0.4
V
Shutdown hysteresis voltage
0.1
V
SOFT START
Current source
SS = 0 V
7
10
13
µA
Pulldown RDSON
10


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