Datasheet

LM2734
SNVS288I –SEPTEMBER 2004–REVISED APRIIL 2013 www.ti.com
Electrical Characteristics
Specifications with standard typeface are for T
J
= 25°C, and those in boldface type apply over the full Operating
Temperature Range (T
J
= -40°C to 125°C). V
IN
= 5V, V
BOOST
- V
SW
= 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
V
FB
Feedback Voltage 0.784 0.800 0.816 V
ΔV
FB
/ΔV
IN
Feedback Voltage Line Regulation V
IN
= 3V to 20V 0.01 % / V
I
FB
Feedback Input Bias Current Sink/Source 10 250 nA
Undervoltage Lockout V
IN
Rising 2.74 2.90
UVLO Undervoltage Lockout V
IN
Falling 2.0 2.3 V
UVLO Hysteresis 0.30 0.44 0.62
LM2734X 1.2 1.6 1.9
F
SW
Switching Frequency MHz
LM2734Y 0.40 0.55 0.66
LM2734X 85 92
D
MAX
Maximum Duty Cycle %
LM2734Y 90 96
LM2734X 2
D
MIN
Minimum Duty Cycle %
LM2734Y 1
R
DS(ON)
Switch ON Resistance V
BOOST
- V
SW
= 3V 300 600 mΩ
I
CL
Switch Current Limit V
BOOST
- V
SW
= 3V 1.2 1.7 2.5 A
I
Q
Quiescent Current Switching 1.5 2.5 mA
Quiescent Current (shutdown) V
EN
= 0V 30 nA
LM2734X (50% Duty Cycle) 2.5 3.5
I
BOOST
Boost Pin Current mA
LM2734Y (50% Duty Cycle) 1.0 1.8
Shutdown Threshold Voltage V
EN
Falling 0.4
V
EN_TH
V
Enable Threshold Voltage V
EN
Rising 1.8
I
EN
Enable Pin Current Sink/Source 10 nA
I
SW
Switch Leakage 40 nA
(1) Specified to Average Outgoing Quality Level (AOQL).
(2) Typicals represent the most likely parametric norm.
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