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LM2734 数据表(PDF) 4 Page - Texas Instruments

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部件名 LM2734
功能描述  LM2734 Thin SOT 1A Load Step-Down DC-DC Regulator
Download  31 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM2734 数据表(HTML) 4 Page - Texas Instruments

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LM2734
SNVS288I – SEPTEMBER 2004 – REVISED APRIIL 2013
www.ti.com
Electrical Characteristics
Specifications with standard typeface are for TJ = 25°C, and those in boldface type apply over the full Operating
Temperature Range (TJ = -40°C to 125°C). VIN = 5V, VBOOST - VSW = 5V unless otherwise specified. Datasheet min/max
specification limits are ensured by design, test, or statistical analysis.
Symbol
Parameter
Conditions
Min(1)
Typ(2)
Max(1)
Units
VFB
Feedback Voltage
0.784
0.800
0.816
V
ΔVFB/ΔVIN
Feedback Voltage Line Regulation
VIN = 3V to 20V
0.01
% / V
IFB
Feedback Input Bias Current
Sink/Source
10
250
nA
Undervoltage Lockout
VIN Rising
2.74
2.90
UVLO
Undervoltage Lockout
VIN Falling
2.0
2.3
V
UVLO Hysteresis
0.30
0.44
0.62
LM2734X
1.2
1.6
1.9
FSW
Switching Frequency
MHz
LM2734Y
0.40
0.55
0.66
LM2734X
85
92
DMAX
Maximum Duty Cycle
%
LM2734Y
90
96
LM2734X
2
DMIN
Minimum Duty Cycle
%
LM2734Y
1
RDS(ON)
Switch ON Resistance
VBOOST - VSW = 3V
300
600
m
ICL
Switch Current Limit
VBOOST - VSW = 3V
1.2
1.7
2.5
A
IQ
Quiescent Current
Switching
1.5
2.5
mA
Quiescent Current (shutdown)
VEN = 0V
30
nA
LM2734X (50% Duty Cycle)
2.5
3.5
IBOOST
Boost Pin Current
mA
LM2734Y (50% Duty Cycle)
1.0
1.8
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 Average Outgoing Quality Level (AOQL).
(2)
Typicals represent the most likely parametric norm.
4
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Copyright © 2004–2013, Texas Instruments Incorporated
Product Folder Links: LM2734


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