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LM2734Z Datasheet(PDF) 5 Page - Texas Instruments

Part # LM2734Z
Description  Thin SOT 1-A Load Step-Down DC-DC Regulator
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM2734Z Datasheet(HTML) 5 Page - Texas Instruments

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LM2734Z, LM2734Z-Q1
www.ti.com
SNVS334F – JANUARY 2005 – REVISED JANUARY 2016
6.4 Thermal Information
LM2734Z
THERMAL METRIC(1)
DDC (SOT)
NGG (WSON)
UNIT
6 PINS
6 PINS
RθJA
Junction-to-ambient thermal resistance(2)
180.3
56.2
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
51.6
52.6
°C/W
RθJB
Junction-to-board thermal resistance
27.7
30.7
°C/W
ψJT
Junction-to-top characterization parameter
1.2
0.9
°C/W
ψJB
Junction-to-board characterization parameter
27.3
30.8
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
10.7
°C/W
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report (SPRA953).
(2)
Thermal shutdown occurs if the junction temperature exceeds 165°C. The maximum power dissipation is a function of TJ(MAX), RθJA and
TA . The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) – TA)/RθJA . All numbers apply for packages
soldered directly onto a 3-in × 3-in printed-circuit-board with 2-oz. copper on 4 layers in still air. For a 2-layer board using 1-oz. copper in
still air, RθJA = 204°C/W.
6.5 Electrical Characteristics
All typical specifications are for TJ = 25°C, and all maximum and minimum limits apply over the full operating temperature
range (TJ = –40°C to 125°C). VIN = 5 V, VBOOST – VSW = 5 V (unless otherwise noted). Data sheet minimum and maximum
specification limits are specified by design, test, or statistical analysis.
PARAMETER
TEST CONDITIONS
MIN(1)
TYP(2)
MAX(1)
UNIT
VFB
Feedback voltage
0.784
0.8
0.816
V
ΔVFB/ΔVIN
Feedback voltage line regulation
VIN = 3 V to 20 V
0.01
% / V
IFB
Feedback input bias current
Sink and source
10
250
nA
Undervoltage lockout
VIN Rising
2.74
2.90
UVLO
Undervoltage lockout
VIN Falling
2
2.3
V
UVLO hysteresis
0.30
0.44
0.62
FSW
Switching frequency
2.2
3.0
3.6
MHz
DMAX
Maximum duty cycle
78%
85%
DMIN
Minimum duty Cycle
8%
VBOOST - VSW = 3 V
300
600
m
(SOT Package)
RDS(ON)
Switch ON resistance
VBOOST - VSW = 3 V
340
650
m
(WSON Package)
ICL
Switch current limit
VBOOST - VSW = 3 V
1.2
1.7
2.5
A
Quiescent current
Switching
1.5
2.5
mA
IQ
Quiescent current (shutdown)
VEN = 0 V
30
nA
IBOOST
Boost pin current
(Switching)
4.25
6
mA
Shutdown threshold voltage
VEN Falling
0.4
VEN_TH
V
Enable threshold voltage
VEN Rising
1.8
IEN
Enable pin current
Sink/source
10
nA
ISW
Switch leakage
40
nA
(1)
Specified to Texas Instruments' Average Outgoing Quality Level (AOQL).
(2)
Typicals represent the most likely parametric norm.
Copyright © 2005–2016, Texas Instruments Incorporated
Submit Documentation Feedback
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Product Folder Links: LM2734Z LM2734Z-Q1


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