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LM2594MX-3.3/NOPB Datasheet(PDF) 5 Page - Texas Instruments

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Part # LM2594MX-3.3/NOPB
Description  LM2594/LM2594HV SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM2594MX-3.3/NOPB Datasheet(HTML) 5 Page - Texas Instruments

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LM2594, LM2594HV
www.ti.com
SNVS118C – DECEMBER 1999 – REVISED APRIL 2013
All Output Voltage Versions Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating
Temperature Range . Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable version and VIN = 24V for the
12V version. ILOAD = 100 mA
Symbol
Parameter
Conditions
LM2594/LM2594HV-XX
Units
(Limits)
Typ(1)
Limit(2)
DEVICE PARAMETERS
Ib
Feedback Bias Current
Adjustable Version Only, VFB = 1.3V
10
50/100
nA
fO
Oscillator Frequency
See(3)
150
kHz
127/110
kHz(min)
173/173
kHz(max)
VSAT
Saturation Voltage
IOUT = 0.5A
(4) (5)
0.9
V
1.1/1.2
V(max)
DC
Max Duty Cycle (ON)
See(5)
100
%
Min Duty Cycle (OFF)
See(6)
0
ICL
Current Limit
Peak Current(4)(5)
0.8
A
0.65/0.58
A(min)
1.3/1.4
A(max)
IL
Output Leakage Current
Output = 0V(4)(6)(7)
50
μA(max)
Output =
−1V
2
mA
15
mA(max)
IQ
Quiescent Current
See(6)
5
mA
10
mA(max)
ISTBY
Standby Quiescent Current
ON/OFF pin = 5V (OFF)(7)
85
μA
LM2594
200/250
μA(max)
LM2594HV
140
250/300
μA(max)
θJA
Thermal Resistance
P Package, Junction to Ambient(8)
95
°C/W
MDPackage, Junction to Ambient(8)
150
ON/OFF CONTROL Test Circuit Figure 20
ON /OFF Pin Logic Input
1.3
V
VIH
Threshold Voltage
Low (Regulator ON)
0.6
V(max)
VIL
High (Regulator OFF)
2.0
V(min)
IH
ON /OFF Pin Input Current
VLOGIC = 2.5V (Regulator OFF)
5
μA
15
μA(max)
IL
VLOGIC = 0.5V (Regulator ON)
0.02
μA
5
μA(max)
(1)
Typical numbers are at 25°C and represent the most likely norm.
(2)
All limits ensured 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)
The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the
severity of current overload.
(4)
No diode, inductor or capacitor connected to output pin.
(5)
Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
(6)
Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force
the output transistor switch OFF.
(7)
VIN = 40V for the LM2594 and 60V for the LM2594HV.
(8)
Junction to ambient thermal resistance with approximately 1 square inch of printed circuit board copper surrounding the leads. Additional
copper area will lower thermal resistance further. See application hints in this data sheet and the thermal model in Switchers Made
Simple® software.
Copyright © 1999–2013, Texas Instruments Incorporated
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Product Folder Links: LM2594 LM2594HV


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