TSC TS2596 Technical data
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TS2596 Preliminary
3A Step Down Switching Voltage Regulator
Pin assignment:
1. Input
2. Output
3. Ground
4. Feedback
5. Enable
150KHz Oscillating Frequency
Output Current up to 3A
Enable Input Control
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 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
Guaranteed 3A output current
3.3V, 5V, and adjustable versions
Wide input voltage range, up to 40V
Internal oscillator of 150KHz fixed frequency
Wide adjust version output voltage range, from 1.23V
to 25V ±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
Absolute Maximum Rating
Ordering Information
Part No.
TS2596CZ5xx
TS2596CZ5
TS2596CM5xx
TS2596CM5
Note: Where xx denotes voltage option, available are
5V and 3.3V. Leave blank for adjustable
version. Contact factory for additional voltage
options.
Operating Temp.
Package
(Ambient)
TO-220-5L
-20 ~ +85 oC
TO-263-5L
Applications
LCD Monitors
ADD-ON Cards Switching Regulators
High Efficiency Step-Down Regulators
Efficient Pre-regulator for Linear Regulator
Input Voltage Vin +40 V
ENABLE Pin Input Voltage Vin (operate) -0.3V ≤ V ≤ Vin V
Power Dissipation PD Internal Limited W
Operating Junction Temperature Range TJ -40 ~ +125
Storage Temperature Range T
Lead Soldering Temperature (260 oC) 5 S
-65 ~ +150
STG
o
C
o
C
TS2596 1-6 2003/12 rev. D
Thermal Performance
Condition Symbol Limits Unit
Thermal Resistance Junction to Ambient Θja 30
Thermal Resistance Junction to Case Θjc 3
Recommended Operating Conditions (Ta = 25
o
C)
o
C/W
Condition Symbol Limits Unit
Input Voltage Vin 4.5 ~ 28 V
ENABLE Pin Input Voltage Vin (operate) 0 ~ +20 V
Block Diagram
Electrical Characteristics
Vin = 12V, IL = 500mA, Ta = 25
Parameter Conditions Min Typ Max Unit
TS2596-3.3V
Output Voltage (Note 1)
Efficiency Vin=12V, IL=3A -- 75 -- %
TS2596-5V
Output Voltage (Note 1)
Efficiency Vin=12V, IL=3A -- 80 -- %
o
C unless otherwise specified.
0.2A ≤ I
(Figure 1)
0.2A ≤ I
(Figure 1)
≤ 3A, 5.07V ≤ Vin ≤ 40V
L
≤ 3A, 8V ≤ Vin ≤ 40V
L
0.96|Vo| 3.3 1.04|Vo| V
0.96|Vo| 5.0 1.04|Vo| V
TS2596 2-6 2003/12 rev. D
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