LM2672
SNVS136K –SEPTEMBER 1998–REVISED APRIL 2013
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Max(2)
Units
LM2672-12 Electrical Characteristics
Symbol
Parameter
Conditions
Typ(1)
Min(2)
SYSTEM PARAMETERS Test Circuit Figure 22(3)
VOUT
Output Voltage
Efficiency
VIN = 15V to 40V, ILOAD = 20 mA to 1A
VIN = 24V, ILOAD = 1A
12
94
11.82/11.64
12.18/12.36
V
η
%
(1) Typical numbers are at 25°C and represent the most likely norm.
(2) All limits specified at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits
are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(3) External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect
switching regulator performance. When the LM2672 is used as shown in Figure 22 and Figure 23 test circuits, system performance will
be as specified by the system parameters section of the Electrical Characteristics.
LM2672-ADJ Electrical Characteristics
Symbol
Parameter
Conditions
Typ(1)
Min(2)
Max(2)
Units
SYSTEM PARAMETERS Test Circuit Figure 23(3)
VFB
VFB
η
Feedback Voltage VIN = 8V to 40V, ILOAD = 20 mA to 1A
VOUT Programmed for 5V
1.210
1.192/1.174
1.228/1.246
V
(see Circuit of Figure 23)
Feedback Voltage VIN = 6.5V to 40V, ILOAD = 20 mA to 500 mA
VOUT Programmed for 5V
1.210
90
1.192/1.174
1.228/1.246
V
(see Circuit of Figure 23)
Efficiency
VIN = 12V, ILOAD = 1A
%
(1) Typical numbers are at 25°C and represent the most likely norm.
(2) All limits specified at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits
are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(3) External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect
switching regulator performance. When the LM2672 is used as shown in Figure 22 and Figure 23 test circuits, system performance will
be as specified by the system parameters section of the Electrical Characteristics.
All Output Voltage Versions
Specifications with standard type face are for TJ = 25°C, and those in bold type face apply over full Operating Temperature
Range. Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable versions and VIN = 24V for the 12V version,
and ILOAD = 100 mA.
Symbol
Parameters
Conditions
Typ
2.5
2.5
Min
Max
Units
DEVICE PARAMETERS
IQ
Quiescent Current
VFEEDBACK = 8V
3.6
mA
For 3.3V, 5.0V, and ADJ Versions
VFEEDBACK = 15V
mA
For 12V Versions
ISTBY
ICL
Standby Quiescent Current
Current Limit
ON/OFF Pin = 0V
50
1.55
1
100/150
2.1/2.2
25
μA
A
1.25/1.2
IL
Output Leakage Current
VIN = 40V, ON/OFF Pin = 0V
VSWITCH = 0V
μA
VSWITCH = −1V, ON/OFF Pin = 0V
ISWITCH = 1A
6
0.25
260
95
15
0.30/0.50
275
mA
Ω
RDS(ON)
Switch On-Resistance
Oscillator Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Feedback Bias
fO
D
Measured at Switch Pin
225
kHz
%
0
%
IBIAS
VFEEDBACK = 1.3V
ADJ Version Only
85
nA
Current
4
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