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LM2672MX-3.3 Datasheet(PDF) 4 Page - Texas Instruments

No. de pieza LM2672MX-3.3
Descripción Electrónicos  LM2672 SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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LM2672MX-3.3 Datasheet(HTML) 4 Page - Texas Instruments

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LM2672
SNVS136K – SEPTEMBER 1998 – REVISED APRIL 2013
www.ti.com
LM2672-12 Electrical Characteristics
Symbol
Parameter
Conditions
Typ(1)
Min(2)
Max(2)
Units
SYSTEM PARAMETERS Test Circuit Figure 22(3)
VOUT
Output Voltage
VIN = 15V to 40V, ILOAD = 20 mA to 1A
12
11.82/11.64
12.18/12.36
V
η
Efficiency
VIN = 24V, ILOAD = 1A
94
%
(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
Feedback Voltage
VIN = 8V to 40V, ILOAD = 20 mA to 1A
1.210
1.192/1.174
1.228/1.246
V
VOUT Programmed for 5V
(see Circuit of Figure 23)
VFB
Feedback Voltage
VIN = 6.5V to 40V, ILOAD = 20 mA to 500 mA
1.210
1.192/1.174
1.228/1.246
V
VOUT Programmed for 5V
(see Circuit of Figure 23)
η
Efficiency
VIN = 12V, ILOAD = 1A
90
%
(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
Min
Max
Units
DEVICE PARAMETERS
IQ
Quiescent Current
VFEEDBACK = 8V
2.5
3.6
mA
For 3.3V, 5.0V, and ADJ Versions
VFEEDBACK = 15V
2.5
mA
For 12V Versions
ISTBY
Standby Quiescent Current
ON/OFF Pin = 0V
50
100/150
μA
ICL
Current Limit
1.55
1.25/1.2
2.1/2.2
A
IL
Output Leakage Current
VIN = 40V, ON/OFF Pin = 0V
1
25
μA
VSWITCH = 0V
VSWITCH = −1V, ON/OFF Pin = 0V
6
15
mA
RDS(ON)
Switch On-Resistance
ISWITCH = 1A
0.25
0.30/0.50
Ω
fO
Oscillator Frequency
Measured at Switch Pin
260
225
275
kHz
D
Maximum Duty Cycle
95
%
Minimum Duty Cycle
0
%
IBIAS
Feedback Bias
VFEEDBACK = 1.3V
85
nA
Current
ADJ Version Only
4
Submit Documentation Feedback
Copyright © 1998–2013, Texas Instruments Incorporated
Product Folder Links: LM2672


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