TECHNICAL DATA
Switching Voltage Regulators
Features
•
3.3V, 5V, 12V, and adjustable output versions
•
Adjustable version output voltage range, 1.2V to 37V
± 3% max over line and load conditions
•
Guaranteed 1A output load current
•
Input voltage range up to 40V
•
Requires only 4 external components
•
Excellent line and load regulation specifications
•
150kHz fixed frequency internal oscillator
•
TTL shutdown capability
•
Low power standby mode,
I
Q
typically 100µA
•
Thermal shutdown and current limit protection
IL2595-xx
TO-220-5L
TO-220-5L
TO-263-5L
Functions
•
Simple high-efficiency step-down regulator
•
On-card switching regulators
•
Positive to negative converter
ORDERING INFORMATION
IL2595Q
IL2595S
IL2595D2
TO-220-5L
TO-220-5L
TO-263-5L
T
A
= -40° to 125° C for all packages
Pin Discription
Bent and Staggered Leads,
Through Hole Package
5–Lead TO-220
Surface Mount Package
5-Lead TO-263
Description
The IL2595 series of regulators are monolithic integrated circuits that provide all the active functions for a
step-down switching regulator, capable of driving a 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.
Requiring a minimum number of external components, these regulators are simple to use.
The IL2595 series operates at a switching frequency of 150kHz. Available in standard 5-lead TO-220 and
TO-263 package.
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
typically 100µA standby current. Self protection features include a two stage frequency reducing current limit
for output switch and an over temperature shutdown for complete protection under fault conditions. The over
temperature shutdown level is about 145
o
C with 5
o
C hysteresis.
Rev. 00 1
IL2595-xx
Electrical Characteristics
(continue)
Characteristic
Thermal Resistance
Symbol
θ
JC
θ
JA
θ
JA
θ
JA
θ
JA
Test Condition
TO-220 or TO-263 Package
Junction to Case
TO-220 Package Junction to
Ambient (Note 4)
TO-263 Package Junction to
Ambient (Note 5)
TO-263 Package Junction to
Ambient (Note 6)
TO-263 Package Junction to
Ambient (Note 7)
Min
Typ
2
50
50
30
20
Max
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
Note 1:
No elements connected to output pin.
Note 2:
Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 3:
Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the A version, and 15V for the
12V version. To force the output transistor switch OFF.
Note 4:
Junction to ambient thermal resistance (no external heat sink) for the TO-220 package mounted vertically, with
the leads soldered to a printed circuit board with (1 oz.) copper area of approximately 1 in
2
.
Note 5:
Junction to ambient thermal resistance with the TO-263 package tab soldered to a single printed circuit board
with 0.5 in
2
of (1 oz.) copper area.
Note 6:
Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit
board with 2.5 in
2
of (1 oz.) copper area.
Note 7:
Junction to ambient thermal resistance with the TO-263 package tab soldered to a double sided printed circuit
board with 3 in
2
of (1 oz.) copper area on the IL2595S side of the board, and approximately 16 in
2
of copper on
the other side of the p-c board.
Typical Performance Characteristics
(circuit of Figure 1)
Rev. 00 4
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