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S5U2596M PDF даташит

Спецификация S5U2596M изготовлена ​​​​«SeCoS» и имеет функцию, называемую «3A PWM Step-Down DC/DC Converter».

Детали детали

Номер произв S5U2596M
Описание 3A PWM Step-Down DC/DC Converter
Производители SeCoS
логотип SeCoS логотип 

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S5U2596M Даташит, Описание, Даташиты
www.DataSheet4U.com
Elektronische Bauelemente
Description
The S5U2596M series of regulators are monolithic integrated circuit
that provides 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 voltages of
3.3V,5V,12V and an adjustable output version. The S5U2596M
series ioerate at a switching frequency of 150 KHz; thus allowing
smaller sized filter components than what would be needed with
lower frequency switching regulators. Available in standard 5-lead
TO-263 package with several different lead bend options. Other
feature include a guaranteed ±4% to tolerance on output voltage
under specified input voltages and output load conditions. The 150
KHz ±15% is on the oscillator frequency. External shutdown is
included, featuring 80uA(Typ.) standby current. The output switch
includes cycle-by cycle current limiting, as well as thermal shutdown
for full protection under fault conditions.
Features
* Uses Readily Available Standard Inductors
* Operating Voltage Can Be Up To 22V
* Thermal Shutdown And Current Limit Protection
* 3.3V,5V,12V and adjustable Output Versions
* TTL Shutdown Capability
* Built-in TTL On/Off Control
* Guaranteed 3A Output Current
* 150 KHz Fixed Frequency Internal Oscillator
Applications
* Positive To Negative Converter
* High-Effciency Step-Down Regulator
* One-ch Switching Regulators Simple
Block Diagram
S5U2596M
150 KHz, 3A PWM
Step-Down DC/DC Converter
REF.
A
b
L4
c
L1
E
Millimeter
Min. Max.
REF.
4.40 4.80 c2
0.66 0.91 L2
0.00 0.30 B D
0.36 0.5
e
2.29 2.79 L
9.80 10.4
Millimeter
Min. Max.
1.25 1.45
1.27 REF.
8.6 9.0
1.70 REF.
14.6 15.8
0˚ 8˚
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 1 of 6









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S5U2596M Даташит, Описание, Даташиты
www.DataSheet4U.com
Elektronische Bauelemente
S5U2596M
150 KHz, 3A PWM
Step-Down DC/DC Converter
Pin Function
Pin Name
GVNIDN
Output
Ground
Feedback(FB)
NOCN/OFF(SD)
Pi1n#mumTshtuissbteisbpetrhepesreepsnoetsniattitvaetht iisnthpipsuitnpsitDnuopetpmoslyicnmfirmoiinrpiizmttehiizeovenoIClvtFaosglutwaenigtctecrhatitninroasginnersneietgsnutlasantoadrn.tdoAtsosuupsitupaplbypleltyhinethpsuewt sibtwcyhiptcianhsgisncgcuarcpruearncretitnotr
2
needed by regulator.
ITnytpeircnaalllyswa itlachrg.eTshteorvaogletagceapaatcitthoirs
with a duty cycle of approximately
ispViOncUosTnw/nV.ietIcNTch.oteeTdsmofibnrmoeimmtinwiizemteheiinzsceo(p+ucinpVolIuitNnopgl-igntVrgooSuAtsnoTed)nsasteoinntidsvineitasivpuceprirerccoutixrhictiamruyti,attrthtyehe,ley0ti1h.n5P-.ep03VCu.V,P5t VC,
board copper area connected to this pin should be keep to a minimum.
3 Circuit ground
or open= output enable.
4 Senses the regulated outptaugt evodltoaegse ntootcosmagplbeetelotwhethfeeemdbinaicmkulomopd.ropout voltage during the load
5 A18ll1AVoian8wpl)plVopssuw)rhtotssuhxshteistmuuhsptteashwpteseltiyhtwlcryeehictgic1rnueuh.gr3gliranVeurtgneloatgtrruteuodrtgnlrooasudwtlooaantrhwpt.oecpnIrifrr.roccteIhxufirgiicistmtuhulstiaaisothtteosutbolhrtyeduboosten1dwh,5onsu0wahtdfnnueoAdtadfw.etpounaVPwurteluuunlhisrlnilseiiiuggnnsnihggsitoenhlntrgotishongtlitehosipcneaginednilpceeeiavndVdlbeee,olovbdOuevse,telNiglOosi/nn1OwNiga.3F/nolOsVtraFa.hdFlsrTpe(tFe.uhrihsnrpTpuhefcihsosnotaurohlddcnsotraaholbddnvepmreoobltvdawptheaoexiegrltivwtmheaeitciedogrueetemtootadoofflttotooaoffl
the ground pin.
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Supply Voltage
VCC
24
ON/OFF Pin Input Voltage
VSD -0.3 ~ +18
Feedback Pin Voltage
VFB -0.3 ~ +18
Output Voltage to ground
VOUT
-1
Power Dissipation
PD Internally Limited
Storage Temperature
TST -65 ~ +150
Operating temperature
TOP -40 ~ +125
Operating Voltage
VOP +4.5 ~ +22
S5U2596M Electrical Characteristics
Specifications in boldface type are for full operating temperature range. The other type are for TJ=25 .
Unit
V
V
V
V
W
V
Parameter
Symbol
Conditions
Min Typ Max Unit
Output Feedback
Efficiency
VFB
5 VIN 22V, 0.2A
VOUT=3V
ILOAD
3A
1.193/1.180
1.230
1.267/1.280
VIN=12V, ILOAD=3A, VOUT=3V
74
V
%
S5U2596M-33 Electrical Characteristics
Specifications in boldface type are for full operating temperature range. The other type are for TJ=25 .
Parameter
Symbol
Conditions
Min Typ Max Unit
Output Feedback
Efficiency
VFB
5.5V VIN 22V
0.2A ILOAD 3A
VIN=12V, ILOAD=3A
3.168/3.135 3.3 3.432/3.465 V
75 %
S5U2596M-50 Electrical Characteristics
Specifications in boldface type are for full operating temperature range. The other type are for TJ=25 .
Parameter
Symbol
Conditions
Min Typ Max Unit
Output Feedback
Efficiency
VFB
8V VIN 22V
0.2A ILOAD 3A
VIN=12V, ILOAD=3A
4.80/4.75 5.0 5.20/5.25 V
80 %
S5U2596M-12 Electrical Characteristics
Specifications in boldface type are for full operating temperature range. The other type are for TJ=25 .
Parameter
Symbol
Conditions
Min Typ Max Unit
Output Feedback
Efficiency
VFB
15V VIN 22V
0.2A ILOAD 3A
VIN=16V, ILOAD=3A
11.52/11.40 12 12.48/12.60 V
89 %
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 2 of 6









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S5U2596M Даташит, Описание, Даташиты
www.DataSheet4U.com
Elektronische Bauelemente
S5U2596M
150 KHz, 3A PWM
Step-Down DC/DC Converter
All Output Voltage Version Electrical Characteristics
Specifications in boldface type are for full operating temperature range. The other type are for TJ=25 .
Parameter
Symbol
Conditions
Min Typ
Feedback bias current
IFB VFB=1.3V (adjustable version only)
- -10
Oscillator frequency
FOSC
127/110 150
Max
-50/-100
173/173
Oscillator frequency of
short circuit protect
FSCP
When current limit occurred and
VFB<0.5V, TA=25 .
5
15 25
Saturation voltage
VSAT
ILOAD=3A No outside circuit
VFB=0V force drive on
- 1.4 1.6/1.7
Max. duty cycle (ON)
Max. duty cycle (OFF)
DC
VFB=0V force drive on
VFB=12V force drive off
- 100 -
-0-
Current limit
ICL
Peak current No outside circuit
VFB=0V force drive on
3.6
4.5 5.5/6.5
Output leakage current
Output=0V, No outside circuit
IL VFB=12V force drive off
Output=-1V, VIN=22V
- - -200
- -5 -
Quiescent current
IQ VFB=12V force drive off
- 5 10
ON/OFF pin logic input
Threshold Voltage
VIL Low (Regulator ON)
VIH High (Regulator OFF)
- - 0.6
2.0 --
-
ON/OFF pin Logic input
current
IH
VLOGIC=2.5V ( Regulator OFF)
-
- -0.01
ON/OFF pin input
current
Standby quiescent
current
Thermal Resistance
IL VLOGIC=0.5V ( Regulator ON)
ISTBY
JC
JA
ON/OFF pin=5V, VIN=12V
Junction to Case
Junction to Ambient with copper
area of approximately 3 in2
-
-
-
-
-0.1 -1
150 200
3.5 -
23 -
Unless otherwise specified, VIN=12V for 3.3V, 5V, adjustable version and VIN=18V for the 12V version. ILOAD=0.5A
Unit
nA
kHz
kHz
V
%
A
uA
mA
mA
V
uA
uA
/W
Function Description
The TO-263 surface mount package tab was designed to be soldering to the copper on printed circuit board. The copper and the board are
the heat sink for this package and the other heat producing components, such as the catch diode and inductor. The PC board copper area
that the package is soldered to should be at least 0.8in2, and ideally should have 2 or more square inches of 2 oz. Additional copper area
improves the thermal characteristics, but with copper area greater than approximately 6in2, only small improvements in heat dissipation are
realized. If further thermal improvements are needed, double sided, multi-layer PC board with large copper areas and/or airflow will be
recommended.
The S5U2596M junction temperature rises above ambient temperature with a 2A load for various input and output voltages. This data was
taken with the circuit operating as a buck-switching regulator with all components mounted on a PC board to simulate the junction
temperature under actual operating conditions. This curve can be used for a quick check for the approximate junction temperature for
various conditions, but be aware that there are many factors that can affect the junction temperature. When load current higher than 3A
are used, double sided or multi-layer PC boards with lager copper areas and/or airflow might be needed, especially for high ambient
temperatures and high output voltages.
For the best thermal performance, wide copper traces and generous amounts of printed circuit board copper should be used in the board
layout. (One exception to this is the output (switch) pin, which should not have large areas of copper.) Large areas of copper provide the
best transfer of heat (lower thermal resistance) to the surrounding air, and moving air lowers the thermal resistance even further.
Package thermal resistance and junction temperature rise numbers are all approximate, and there are many factors will affect these
numbers. Some of these factors include board size, shape, thickness, position, location and even board temperature. Other factors are,
trace width, total printed circuit copper area, copper thickness, single or double-sided, multi-layer board and the amount of solder on the
board. The effectiveness of the PC board to dissipate heat also depends on the size, quantity and spacing of other components on the
board, as well as the surrounding air is still or moving. Furthermore, some of these components such as the catch diode will add heat to
the PC board and the heat can vary as the input voltage changes. For the inductor, depending on the physical size, type of core material
and the DC resistance, it could either act as a heat sink taking heat away from the board, or it could add heat to the board.
h tp://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 3 of 6










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Номер в каталогеОписаниеПроизводители
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