TSC TS2576 Technical data
查询TS2576供应商
TS2576
3A Step Down Switching Voltage Regulator
Pin assignment:
1. Input
2. Output
3. Ground
4. Feedback
5. Enable
52KHz Oscillating Frequency
Output Current up to 3A
Enable Input Control
General Description
The TS2576 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 TS2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. Also it requires a
minimum number of external components. 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 70µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as
thermal shutdown for full protection under fault conditions.
This series are offered in 5-pin TO-263, TO-220 package.
Features
Ordering Information
Guaranteed 3A output current
3.3V, 5V, and adjustable versions
Wide input voltage range, up to 40V
Internal oscillator of 52KHz fixed frequency
Wide adjust version output voltage range, from 1.23V
to 37V ±4% max. at over line and load conditions.
Low standby current, typ. 70µA, at shutdown mode
Requires only 4 external components
Thermal shutdown and current limit protection
P+ product enhancement tested
Applications
LCD Monitors
ADD-ON Cards Switching Regulators
High Efficiency Step-Down Regulators
Part No. Operating Temp.
Package
(Ambient)
TS2576CZ5-xx
TS2576CZ5
TS2576CM5-xx
TS2576CM5
Note: Where xx denotes voltage option, available are
12V, 5V and 3.3V. Leave blank for adjustable
version. Contact factory for additional voltage
options.
-20 ~ +85
o
C
TO-220-5L
TO-263-5L
Efficient Pre-regulator for Linear Regulators
Positive to Negative converter (Buck-Boost)
Absolute Maximum Rating
Input Voltage Vin +45 V
ENABLE Pin Input Voltage Vin (operate) -0.3V ≤ V ≤ Vin V
Power Dissipation PD Internal Limited W
Operating Junction Temperature Range TJ -0 ~ +150
Storage Temperature Range T
Lead Soldering Temperature (260 oC)
TO-220-5L / TO-263-5L Package
-65 ~ +150
STG
5
o
C
o
C
S
TS2576 1-7 2003/12 rev. A
Block Diagram
Electrical Characteris t ic s
Vin = 12V, IL = 500mA, Ta = 25
Parameter Conditions Min Typ Max Unit
TS2576-3.3V
Output Voltage (Note 1) Vin=12V, IL=0.5A (Figure 1) 0.98|Vo| 1.02|Vo|
Output Voltage (Note 1) 0.5A ≤ IL ≤ 3A, 6V ≤ Vin ≤ 40V
Efficiency Vin=12V, IL=3A -- 75 -- %
TS2576-5V
Output Voltage (Note 1) Vin=12V, IL=0.5A(Figure 1) 0.98|Vo| 1.02|Vo|
Output Voltage (Note 1) 0.5A ≤ IL ≤ 3A, 8V ≤ Vin ≤ 40V
Efficiency Vin=12V, IL=3A -- 77 -- %
TS2576-12V
Output Voltage (Note 1) Vin=25V, IL=0.5A (Figure 1) 0.98|Vo| 1.02|Vo|
Output Voltage(Note 1) 0.5A ≤ IL ≤ 3A, 15V ≤ Vin ≤ 40V
Efficiency Vin=15V, IL=3A -- 88 -- %
TS2576
Feedback Voltage (Note 1) Vin=12V, Vout=5V,IL=0.5A (Figure 2) 0.98|Vo| 1.02|Vo|
Feedback Voltage (Note 1) 0.5A ≤ IL ≤ 3A, 8V ≤ Vin ≤ 40V,
Efficiency Vin=12V, Vout=5V, IL=3A -- 77 -- %
o
C unless otherwise specified.
(Figure 1)
(Figure 1)
(Figure 1)
Vout=5V (Figure 2)
0.96|Vo|
0.96|Vo|
0.96|Vo|
0.96|Vo|
3.3
5.0
12
1.23
1.04|Vo|
1.04|Vo|
1.04|Vo|
1.04|Vo|
V
V
V
V
TS2576 2-7 2003/12 rev. A
All Output Voltage Version (Vin=12V for 5V, 3.3V and Adjustable version, Vin=25V for 12V version, I
Oscillator Frequency (Note 2) 47 52 58
Quiescent Current (Note 3) -- 5 10
Standby Current ENABLE =5V -- 70 200
Saturation Voltage (Note 4) I
Feedback Bias Current V
Duty Cycle (Note 5) Operating (ON) 93 98 --
Current Limit (Note 2)(Note 4) 4.2 7.0 8.8
Output Leakage Current (Note 3)
ENABLE Threshold Voltage
ENABLE Input Current
Note 1: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator
system performance. Refer to Application information for details.
Note 2: The oscillator frequency reduces to approximately 11KHz in the event of fault conditions, such as output short or
overload. And the regulated output voltage will drop approximately 40% from the nominal output voltage. This
self-protection feature lowers the average power dissipation by lowering the minimum duty cycle from 5% down to
approximately 2%.
Note 3: For these parameters, FB is removed from V
Note 4: V
Note 5: FB is removed from V
pin sourcing current. No diode, inductor or capacitor connected to V
OUT
and connected to 0V.
OUT
=3A -- 1.4 1.8
LOAD
=5V (Adj. Version only) -- 50 100
OUT
V
=0V -- 0.3 2
OUT
=-1V -- 7.5 30
V
OUT
VIH (V
V
I
IH
I
IH
=0V) 2.2 1.4 --
OUT
=Normal Output Voltage) -- 1.2 1.0
IL(VOUT
(ENABLE =5V) -- 12 30
(ENABLE =0V) -- 0 10
and connected to +12V to force the output transistor OFF.
OUT
OUT.
= 500mA)
L
kHz
mA
uA
nA
mA
uA
V
%
A
V
TS2576 3-7 2003/12 rev. A
Loading...