CYSTEKEC LM2596-12E5

CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 1/12
150kHz, 3A PWM Buck DC/DC Converter
LM2596-XXE5/F5
Description
The LM2596-XXE5/F5 series of regulators are monolithic ICs that provide all active functions for a step-down
(buck) switching regulator, capable of driving 3A load with excellent line and load regulation. These devices are
available in fixed output voltage of 3.3V, 5V, 12V and an adjustable output version. Requiring a minimum number of
external components, these regulators are simple to use and include internal frequency compensation and a fixedfrequency oscillator.
The LM2596-XXE5/F5 series operates at a switching frequency of 150kHz, thus allowing smaller sized filter
components than what would be needed with lower frequency switching regulators. Available in standard 5-lead
TO-220 and TO-263 packages with several different lead bend options. A standard series of inductors are available
from several different manufacturers optimized for use with the LM2596-XXE5/F5 series. This feature greatly
simplifies the design of switch-mode power supplies. Other features include a guaranteed ±4% tolerance on output
voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External
shutdown is included, featuring 80μA standby current. Self protection features include a two stage frequency
reducing current limit for the output switch and an over temperature shutdown for complete protection under fault
conditions.
Features
● 3.3V, 5V, 12V, and adjustable output versions
● Adjustable version output voltage range, 1.3V to 37V±4% max over line and load conditions
● 150kHz±15% fixed switching frequency
● TTL shutdown capability
● Operating voltage can be up to 40V
● Output load current:3A
● TO220-5L and TO263-5L packages
● Low power standby mode.
● Thermal shutdown and current limit protection.
● High efficiency
● Built-in switching transistor on chip
● Requires only 4 external components
● Use readily available standard inductors
Applications
● Simple high-efficiency step-down (buck) regulator.
● Positive to negative converter (Buck-Boost).
● On-card switching regulators.
LM2596-XXE5/F5
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 2/12
Pin Assignment
Block Diagram
Ordering Information
LM2596-XXE5/F5
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 3/12
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
VCC
VSD
VFB
VOUT
PD
Topr
Tstg
VOP
Supply Voltage
On/Off Pin Input Voltage
Feedback Pin Voltage
Output Voltage to Ground
Power Dissipation
Operating Temperature
Storage Temperature
Operating Voltage
ESD Susceptibility (Note 2)
Value
45
-0.3 ~ +25
-0.3 ~ +25
-1
Internally Limited
-40 ~ +125
-65 ~ +150
+4.5 ~ +40
2000
Unit
V
V
V
V
W
℃
℃
V
V
Electrical Characteristics (All Output Voltage Versions)
Specifications with boldface type are for full operating temperature range, the other type are for TJ=25°C.
(Unless otherwise specified, VIN=12V for the 3.3V, 5V, and adjustable version and VIN=24V for the 12V
version, ILOAD=500mA)
Parameter
Symbol
Test Condition
Min
Typ
Feedback Bias Current
Ib
Adjustable Version Only, VFB=1.3V
-
10
Oscillator Frequency
fO
(Note 6)
127
110
150
IOUT=3A (Note 7, 8)
-
1.16
-
100
0
Max
Unit
Device parameters
Saturation Voltage
VSAT
Max Duty Cycle (ON)
Min Duty Cycle(OFF)
DC
(Note 8)
(Note 9)
Current Limit
ICL
Peak Current ( Note 7, 8)
Output Leakage Current
IL
Output=0V (Note 7, 9)
Output=-1V(Note 10)
Quiescent Current
IQ
(Note 9)
Standby Quiescent Current
ISTBY
TO-220-5L
TO-263-5L
TO-220-5L
θJA
(Note11) TO-263-5L
θJC
Thermal Resistance
ON/OFF Control
ON/OFF Pin Logic Input
Threshold Voltage
ON/OFF Pin Input Current
LM2596-XXE5/F5
ON/OFF pin=5V (Note 10)
VIH
VIL
IIH
IIL
Junction to Case
Junction to
Ambient
Low (Regulator ON)
High (Regulator OFF)
VLOGIC=2.5V (Regulator OFF)
VLOGIC=0.5V (Regulator ON)
3.6
3.4
-
4.5
2
5
-
80
-
2
3.5
50
23
2.0
-
1.3
5
0.02
50
100
173
173
1.4
1.5
KHz
-
%
6.9
7.5
50
30
10
200
250
0.6
15
5
nA
V
A
μA
mA
mA
μA
℃/W
℃/W
V
μA
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 4/12
Electrical Characteristics (Continued)
Specifications with boldface type are for full operating temperature range, the other type are for TJ=25°C.
Part No.
LM2596-3.3
Parameter
Symbol
Conditions
Output Voltage
VOUT
4.75V≤VIN≤40V, 0.2A≤ILOAD≤3A
Efficiency
LM2596-5.0
Output Voltage
Efficiency
LM2596-12
Output Voltage
Efficiency
Output
LM2596-ADJ Feedback
Efficiency
η
VOUT
η
VIN=12V, ILOAD=3A
7V≤VIN≤40V, 0.2A≤ILOAD≤3A
VIN=12V, ILOAD=3A
VOUT
15V≤VIN≤40V, 0.2A≤ILOAD≤3A
η
VIN=25V, ILOAD=3A
4.5V≤VIN≤40V, 0.2A≤ILOAD≤3A
VOUT programmed for 3V
VIN=12V, VOUT=3V, ILOAD=3A
VFB
η
Min
Typ
Max
(Note 3) (Note 4)
3.168
3.432
3.3
3.135
3.465
73
4.800
5.200
5.0
4.750
5.250
80
11.52
12.48
12.0
11.40
12.60
90
1.180
1.280
1.230
1.168
1.292
77
-
Units
V
%
V
%
V
%
V
%
Note 1 : Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate
conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For
guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2 : The human body model is a 100pF capacitor discharged through a 1.5K resistor into each pin.
Note 3 : Typical numbers are at 25℃ and represent the most likely norm.
Note 4 : All limits guaranteed at room temperature (standard face type) and at temperature extremes(bold face type). All room
temperature limits are 100% production tested. All limits at temperature extremes are guaranteed via correlation using
standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level
(AOQL).
Note 5 : External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors
can affect switching regulator system performance.
Note 6 : The switching frequency is reduced when the second stage current limit is activated.
Note 7 : No diode, inductor or capacitor connected to output pin.
Note 8 : Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 9 : Feedback pin removed from output and connected to +12V for the 3.3V, 5V and adjustable version, and +15V for
the 12V version, to force the output transistor switch OFF.
Note 10 : VIN=40V.
Note 11 : Junction to Ambient thermal resistance. (With copper area of approximately 3 in²)
LM2596-XXE5/F5
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 5/12
Typical Performance Characteristics (circuit of Figure 2)
LM2596-XXE5/F5
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 6/12
Typical Performance Characteristics(Cont.)
LM2596-XXE5/F5
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 7/12
Typical Performance Characteristics(Cont.)
LM2596-XXE5/F5
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 8/12
Typical Performance Characteristics(Cont.)
LM2596-XXE5/F5
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 9/12
Typical Application Circuit
LM2596-XXE5/F5
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 10/12
TO-263-5L Dimension
Marking:
Date Code
LM2596□□□
□□□□
Vout:
3.3V→-33
5.0V→-50
12V→-12
ADJ→
blank
Style: Pin 1.Vin 2.Vout 3.GND
4.Feedback 5.ON/OFF
5-Lead TO-220-5L Plastic Package
CYStek Package Code: E5
Inches
Min.
Max.
0.173
0.189
0.030
0.039
0.014
0.020
0.339
0.354
0.386
0.409
0.579
0.602
DIM
A
b
c
D
E
L4
Millimeters
Min.
Max.
4.40
4.80
0.76
1.00
0.36
0.50
8.60
9.00
9.80
10.4
14.7
15.3
DIM
L5
c1
L
e
L1
φ
Inches
Min.
Max.
0.244
0.260
0.049
0.057
0.522
0.561
0.067 REF
0.102
0.114
0.146
0.156
Millimeters
Min.
Max.
6.20
6.60
1.25
1.45
13.25
14.25
1.70 REF
2.60
2.89
3.71
3.96
Notes: 1.Controlling dimension: millimeter
2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.
3.If there is any question with packing specification or packing method, please contact your local CYStek sales office.
Material:
• Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0
LM2596-XXE5/F5
CYStek Product Specification
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 11/12
CYStech Electronics Corp.
TO-263-5L Dimension
Marking:
LM2596□□□
Date Code
□□□□
Vout:
3.3V→-33
5.0V→-50
12V→-12
ADJ→
blank
Style: Pin 1.Vin 2.Vout 3.GND
4.Feedback 5.ON/OFF
5-Lead TO-263-5L Plastic Package
CYStek Package Code: F5
Inches
Min.
Max.
0.173
0.189
0.026
0.036
0.000
0.012
0.014
0.020
0.090
0.110
0.386
0.409
DIM
A
b
L4
c
L1
E
Millimeters
Min.
Max.
4.40
4.80
0.66
0.91
0.00
0.30
0.36
0.50
2.29
2.79
9.80
10.4
DIM
c2
L2
D
e
L
θ
Inches
Min.
Max.
0.049
0.057
0.050 REF
0.339
0.354
0.067 REF
0.575
0.622
0°
8°
Millimeters
Min.
Max.
1.25
1.45
1.27 REF
8.60
9.00
1.70 REF
14.6
15.8
0°
8°
Notes: 1.Controlling dimension :millimeter
2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.
3.If there is any question with packing specification or packing method, please contact your local CYStek sales office.
Material:
• Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0
Recommended wave soldering condition
Product
Pb-free devices
LM2596-XXE5/F5
Peak Temperature
260 +0/-5 °C
Soldering Time
5 +1/-1 seconds
CYStek Product Specification
CYStech Electronics Corp.
Spec. No. : C548F5
Issued Date : 2007.12.11
Revised Date :
Page No. : 12/12
Recommended temperature profile for IR reflow
Profile feature
Average ramp-up rate
(Tsmax to Tp)
Preheat
−Temperature Min(TS min)
−Temperature Max(TS max)
−Time(ts min to ts max)
Time maintained above:
−Temperature (TL)
− Time (tL)
Peak Temperature(TP)
Time within 5°C of actual peak
temperature(tp)
Ramp down rate
Time 25 °C to peak temperature
Sn-Pb eutectic Assembly
Pb-free Assembly
3°C/second max.
3°C/second max.
100°C
150°C
60-120 seconds
150°C
200°C
60-180 seconds
183°C
60-150 seconds
240 +0/-5 °C
217°C
60-150 seconds
260 +0/-5 °C
10-30 seconds
20-40 seconds
6°C/second max.
6 minutes max.
6°C/second max.
8 minutes max.
Note : All temperatures refer to topside of the package, measured on the package body surface.
Important Notice:
• All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek.
• CYStek reserves the right to make changes to its products without notice.
• CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems.
• CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
LM2596-XXE5/F5
CYStek Product Specification