Datasheet
LM2700
www.ti.com
SNVS152C –MAY 2001–REVISED MARCH 2013
Electrical Characteristics
Specifications in standard type face are for T
J
= 25°C and those with boldface type apply over the full Operating
Temperature Range (T
J
= −40°C to +125°C) Unless otherwise specified. V
IN
=2.2V and I
L
= 0A, unless otherwise specified.
Min Typ Max
Symbol Parameter Conditions Units
(1) (2) (1)
I
Q
Quiescent Current FB = 2.2V (Not Switching)
1.2 2 mA
FSLCT = 0V
FB = 2.2V (Not Switching)
1.3 2 mA
FSLCT = V
IN
V
SHDN
= 0V 5 20 µA
V
FB
Feedback Voltage 1.2285 1.26 1.2915 V
I
CL
(3)
Switch Current Limit V
IN
= 2.7V
(4)
2.55 3.6 4.3 A
%V
FB
/ΔV
IN
Feedback Voltage Line 2.2V ≤ V
IN
≤ 12.0V 0.02 0.07 %/V
Regulation
I
B
FB Pin Bias Current 0.5 40
nA
(5)
V
IN
Input Voltage Range 2.2 12 V
g
m
Error Amp Transconductance ΔI = 5µA 40 155 290 µmho
A
V
Error Amp Voltage Gain 135 V/V
D
MAX
Maximum Duty Cycle FSLCT = Ground 78 85 %
D
MIN
Minimum Duty Cycle FSLCT = Ground 15
%
FSLCT = V
IN
30
f
S
Switching Frequency FSLCT = Ground 480 600 720 kHz
FSLCT = V
IN
1 1.25 1.5 MHz
I
SHDN
Shutdown Pin Current V
SHDN
= V
IN
0.008 1
µA
V
SHDN
= 0V −0.5 −1
I
L
Switch Leakage Current V
SW
= 18V 0.02 20 µA
R
DSON
Switch R
DSON
(6)
V
IN
= 2.7V, I
SW
= 2A 80 150 mΩ
Th
SHDN
SHDN Threshold Output High 0.9 0.6 V
Output Low 0.6 0.3 V
UVP On Threshold 1.95 2.05 2.2 V
Off Threshold 1.85 1.95 2.1 V
θ
JA
Thermal Resistance
(7)
TSSOP, package only 150
°C/W
WSON, package only 45
(1) All limits specified at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are
100% tested or ensured through statistical analysis. All limits at temperature extremes are ensured via correlation using standard
Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) Duty cycle affects current limit due to ramp generator.
(4) Current limit at 0% duty cycle. See Typical Performance Characteristics section for Switch Current Limit vs. V
IN
(5) Bias current flows into FB pin.
(6) Does not include the bond wires. Measured directly at the die.
(7) Refer to Texas Instrument's packaging website for more detailed thermal information and mounting techniques for the WSON and
TSSOP packages.
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