TS2596CM533RN [TSC]
3A / 150KHz Buck Dc-Dc Converter;
| 型号： | TS2596CM533RN |
| 厂家： | 
TAIWAN SEMICONDUCTOR COMPANY, LTD |
| 描述： | 3A / 150KHz Buck Dc-Dc Converter 开关 |
| 文件： | 总9页 (文件大小：272K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TS2596
3A / 150KHz Buck Dc-Dc Converter
TO-220-5L
TO-263-5L
(D2PAK)
Pin Definition:
1. Input
2. SW Output
3. Ground
4. Feedback
5. Enable
General Description
The TS2596 Series are step-down switching regulators with all required active functions. It is capable of driving
3A load with excellent line and load regulations. These devices are available in fixed output voltages of 3.3V, 5V,
and an adjustable output version.
The TS2596 series operates at a switching frequency of 150kHz thus allowing smaller sized filter components
than what would be needed with lower frequency switching regulators. It substantially not only reduces the area of
board size but also the size of heat sink, and in some cases no heat sink is required. The ±4% tolerance on output
voltage within specified input voltages and output load conditions is guaranteed. Also, the oscillator frequency
accuracy is within ±10%. External shutdown is included. Featuring 100µA (typical) standby current. The output
switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault
conditions.
Features
Ordering Information
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Output Voltage: 3.3V, 5V & Adjustable version
Part No.
TS2596CZ5xx C0
Package
TO-220-5L
Packing
50pcs / Tube
Adjustable Output Voltage Range 1.23V~38.5V
150KHz fixed switching frequency
Voltage Mode Non-synchronous PWM control
Thermal Shutdown and Current Limit Protection
ON/OFF Shutdown Control Input
High Efficiency
TS2596CM5xx RN TO-263-5L
Note: Where xx denotes voltage option, available are
50= 5.0V
33= 3.3V
Leave blank for adjustable version
800pcs / 13” Reel
Short Circuit Protect (SCP)
Operating Voltage Can be up to 40V
Output Load Current 3A
Application
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●
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Simple High-efficiency Step down Regulator
Low Power Standby Mode
On-Card Switching Regulators
Built-in switching transistor on chip
Positive to Negative Converter
Absolute Maximum Rating
Parameter
Symbol
VCC
Limit
+45
Unit
V
Maximum Supply Voltage
Recommend Operating Supply Voltage
SW, EN Pin Input Voltage
Feedback Pin Voltage
VOP
+4.5 to +40
-0.3 to +40
-0.3 to +12
Internally Limited
-1
V
VSW, VEN
VFB
V
V
Power Dissipation
PD
W
V
oC
oC
kV
Output Voltage to Ground
Storage Temperature Range
Operating Temperature Range
ESD Susceptibility (HBM)
VOUT
TST
-65 to +150
-40 to +125
2
TOP
1/9
Version: E13
TS2596
3A / 150KHz Buck Dc-Dc Converter
Thermal Information
Parameter
Symbol
Maximum
Unit
TO-220-5L
TO-263-5L
TO-220-5L
TO-263-5L
2
2
Thermal Resistance* (Junction to Case)
ӨJC
oC/W
50
Thermal Resistance* (Junction to Ambient)
ӨJA
oC/W
50
Note: ӨJA is measured with the PCB copper area (need connect to GROUND pins) of approximately 1.5 in2 (Multi-
layer)
Electrical Specifications (All Output Voltage Version)
(Ta = 25oC unless otherwise noted, VIN=12V for 3.3V, 5V, Adjustable version. ILOAD =0.3A)
Parameter
Symbol
Test Condition
Min
Typ Max Unit
4.5V≤ VIN ≤40V
Output Feedback
Efficiency
VFB
η
1.180 1.23 1.280
-- 77 --
3.135 3.3V 3.465
V
%
V
0.2A≤ ILOAD ≤3A
ADJ
3.3V
5V
VIN =12V, ILOAD =3A, VOUT =5V
4.75V≤ VIN ≤40V
Output Feedback
Efficiency
VFB
η
0.2A≤ ILOAD ≤3A
VIN =12V, ILOAD =3A
7V≤ VIN ≤40V
--
75
5
--
%
V
Output Feedback
VFB
4.75
5.25
0.2A≤ ILOAD ≤3A
Efficiency
η
VIN =12V, ILOAD =3A
VFB =1.3V (Adj version only)
--
--
80
10
150
3
--
%
nA
Feedback Bias Current
Oscillator Frequency
Soft-Start Time
IFB
100
173
--
FOSC
TSS
127
--
KHz
mS
Rising edge of EN on to ICL
Pear Current, no outside circuit
VFB =0V force driver on
Current Limit
ICL
3.3
--
--
A
Oscillator Frequency of Short Circuit
Protect
When current limit occurred and
VFB <0.5V, Ta = 25oC
FSCP
110
150
173
KHz
IOUT=3A, No outside circuit
VFB =0V force driver on
Saturation Voltage
VSAT
--
1.15
1.3
1.50
V
VIL
VIH
IH
Low (regulator ON)
High (regulator OFF)
VLOGIC =2.5V (OFF)
VLOGIC =0.5V (ON)
--
2.0
--
0.6
--
ON/OFF Pin Logic Input Threshold
Voltage
V
5
0.02
100
0
15
5
ON/OFF Pin Logic Input Current
µA
IL
--
Maximum Duty Cycle (ON)
Maximum Duty Cycle (OFF)
Quiescent Current
VFB =0V force driver on
VFB =12V force driver off
VFB =12V force driver off
ON/OFF pin=5V
--
--
DC
IQ
%
--
--
--
5
10
200
250
mA
µA
--
Standby Quiescent Current
ISTBY
80
VIN =40V
No outside circuit,
VFB =12V force driver off
VIN =12V
SW pin = 0
SW pin = -1
--
--
0.3
7.5
2
mA
mA
SW Pin Leakage
Current
ISWL
30
2/9
Version: E13
TS2596
3A / 150KHz Buck Dc-Dc Converter
Block Diagram
Typical Application Circuit
1. Adjustable Output Voltage Version
VIN=12V
VIN=12V
L1
Vout=5.0V/3A
1
2
33uH
U1
R1
4.7K
1
Vcc
2
4
5
3
SW
FB
D1
B340A
Vss
C1
C2
C3
C6
R2
1.5K
470uF
0.1uF
470uF 0.1uF
EN
ON/OFF
VIN=24V
VIN=24V
L1
Vout=5.0V/3A
1
2
47uH
U1
R1
4.7K
1
2
4
5
Vcc
3
SW
FB
D1
B340A
Vss
C1
C2
C3
C6
R2
1.5K
470uF
0.1uF
470uF 0.1uF
EN
R1
VOUT = VFB
×
(1 +
R2
), VFB = 1.23V, R2 = 0.7K ~ 3K
R2
VOUT
R1
5.0V
3.3V
2.5V
1.5K
1.5K
1.5K
4.7K
2.5K
1.5K
3/9
Version: E13
TS2596
3A / 150KHz Buck Dc-Dc Converter
Typical Application Circuit (Continue)
2. Fixed Output Voltage Version
VIN=24V
L1
Vout=5.0V/3A
1
2
47uH
U1
1
Vcc
2
3
SW
D1
B340A
Vss
C3
470uF
C2
0.1uF
C6
0.1uF
4
C1
470uF
FB
EN
5
L1 recommend value (IOUT=3A,)
VOUT
2.5V
33uH
33uH
3.3V
33uH
33uH
5V
33~47uH
47uH
12V
NA
VIN=12V
VIN=24V
68uH
Pin Function Description
Vcc
This is the positive input supply for the IC switching regulator. A suitable input bypass capacitor must be presented
at this pin to minimize voltage transients and to supply the switching currents needed by the regulator.
Ground
Circuit ground
SW Output
Internal switch. The voltage at this pin switches between (+Vcc – Vsat) and approximately – 0.5V, with a duty cycle
of approximately Vout / Vcc. To minimize coupling to sensitive circuitry, the PC board copper area connected to this
pin should be minimized.
Feedback
Sense the regulated output voltage to complete the feedback loop.
Enable
Allows the switching regulator circuit to be shutdown using logic level signals thus dropping the total input supply
current to approximately 100uA. Pulling this pin below a threshold voltage of approximately 1.3V turns the regulator
on, and pulling this pin above 1.3V (up to a maximum of Vcc) shuts the regulator down. If this shutdown feature is
not needed, the EN pin can be wired to the ground pin.
Thermal Considerations
The TS2596 is available in two packages, a TO-220-5L and TO-263-5L.
The TO-220-5L package needs a heat sink under most conditions. The size of the heat sink depends on the input
voltage, the output voltage, the load current and the ambient temperature. The TS2596 junction temperature rises
above ambient temperature for a 3A load and different input and output voltages. The data for these curves was
taken with the TS2596 (TO-220-5L package) operating as a buck switching regulator in an ambient temperature of
o
25 C (still air). These temperature rise numbers are all approximate and there are many factors that can affect
these temperatures. Higher ambient temperatures require more heat sinking.
The TO-263-5L surface mount package tab is designed to be soldered to the copper on a printed circuit board. The
copper and the board are the heat sink for this package and the other heat producing components, such as the
2
catch diode and inductor. The PC board copper area that the package is soldered to should be at least 0.8 in , and
ideally should have 2 or more square inches of 2 oz. Additional copper area improves the thermal characteristics,
4/9
Version: E13
TS2596
3A / 150KHz Buck Dc-Dc Converter
Pin Function Description (Continue)
Thermal Considerations
2
but with copper areas greater than approximately 6 in , only small improvements in heat dissipation are realized. If
further thermal improvements are needed, double sided, multilayer PC board with large copper areas and/or airflow
are recommended.
The TS2596 (TO-263-5L package) junction temperature rise above ambient temperature with a 3A 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 currents higher than 3A are used,
double sided or multilayer PC boards with large 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. (Once 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.
5/9
Version: E13
TS2596
3A / 150KHz Buck Dc-Dc Converter
Electrical Characteristics Curve
Figure 1. Output Ripple
Figure 2. Power On Test Wave
(VIN=12V, VOUT=5V, IO=3A)
(VIN=12V, VOUT=5V, IO=3A)
Figure 3. Load Transient Response
Figure 4. EN On Test Wave
(VIN=12V, VOUT=5V, IO=0.2~3A)
(VIN=12V, VOUT=5V, IO=3A)
Figure 5. Efficiency
Figure 6. Efficiency
6/9
Version: E13
TS2596
3A / 150KHz Buck Dc-Dc Converter
TO-220-5L Mechanical Drawing
Unit: Millimeters
Marking Diagram
Y
= Year Code
M
= Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
L
= Lot Code
XX = Voltage Code
(3.3=3.3V, 5.0=5V)
= Package Code for Adjustable type
CZ5 = TO-220-5L
7/9
Version: E13
TS2596
3A / 150KHz Buck Dc-Dc Converter
TO-263-5L Mechanical Drawing
Unit: Millimeters
Marking Diagram
Y
= Year Code
M
= Month Code
(A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep,
J=Oct, K=Nov, L=Dec)
L
= Lot Code
XX = Voltage Code
(3.3=3.3V, 5.0=5V)
= Package Code for Adjustable type
CM5 = TO-263-5L)
8/9
Version: E13
TS2596
3A / 150KHz Buck Dc-Dc Converter
Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,
assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, to
any intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of
sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty,
relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose,
merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify TSC for any damages resulting from such improper use or sale.
9/9
Version: E13
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