Document
TECHNICAL DATA
1.0 A, 15 V, Step-Down Switching Regulator
The IL2575 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step– down switching regulator (buck converter). All circuits of this series are capable of driving a 1.0 A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version. These regulators were designed to minimize the number of external components to simplify the power supply design. Standard series of inductors optimized for use with the IL2575 are offered by several different inductor manufacturers. Since the IL2575 converter is a switch–mode power supply, its efficiency is significantly higher in comparison with popular three–terminal www.DataSheet4U.com linear regulators, especially with higher input voltages. In many cases, the power dissipated is so low that no heatsink is required or its size could be reduced dramatically. A standard series of inductors optimized for use with the IL2575 are available from several different manufacturers. This feature greatly simplifies the design of switch–mode power supplies. The IL2575 features include a guaranteed ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency (±2% over 0°C to 125°C). External shutdown is included, featuring 80 ㎂ (typical) standby current. The output switch includes cycle–by–cycle current limiting, as well as thermal shutdown for full protection under fault conditions.
IL2575-xx
TO-220-5L
TO-220-5L
TO-263-5L
ORDERING INFORMATION IL2575Q IL2575S IL2575D2 TO-220-5L TO-220-5L TO-263-5L
TA = -40° to 125° C for all packages
Features
• • • • • • • • • • 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions Adjustable Version Output Voltage Range, 1.23 to 37 V ±4% Maximum Over Line and Load Conditions Guaranteed 1.0 A Output Current Wide Input Voltage Range Requires Only 4 External Components 52 kHz Fixed Frequency Internal Oscillator TTL Shutdown Capability, Low Power Standby Mode High Efficiency Uses Readily Available Standard Inductors Thermal Shutdown and Current Limit Protection
Pin connections
1. Vin 2. Output 3. Ground 4. Feedback 5. ON/OFF
Applications
• • • • • • Simple High–Efficiency Step–Down (Buck) Regulator Efficient Pre–Regulator for Linear Regulators On–Card Switching Regulators Positive to Negative Converter (Buck–Boost) Negative Step–Up Converters Power Supply for Battery Chargers
Rev. 00
IL2575-xx
Typical Application (Fixed Output Voltage Versions)
Representative Block Diagram and Typical Application
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This device contains 162 active transistors. Figure 1. Block Diagram and Typical Application
ABSOLUTE MAXIMUM RATINGS
(Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.) Rating
Maximum Supply Voltage ON/OFF Pin Input Voltage Output Voltage to Ground (Steady–State) Power Dissipation TO–220, 5–Lead Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case D2PAK Thermal Resistance, Junction–to–Ambient Thermal Resistance, Junction–to–Case Storage Temperature Range Minimum ESD Rating (Human Body Model: C = 100 pF, R = 1.5 kΩ) Lead Temperature (Soldering, 10 seconds) Maximum Junction Temperature Vin – – PD RθJA RθJC PD RθJA RθJC Tstg – – TJ
Symbol
Value
45 –0.3 V ≤V ≤ +Vin –1.0 Internally Limited 65 5.0 Internally Limited 70 5.0 –65 to +150 2.0 260 150 V V V W °C/W °C/W W °C/W °C/W °C kV °C °C
Unit
Rev. 00
IL2575-xx
OPERATING RATINGS
(Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.)
Rating Operating Junction Temperature Range Supply Voltage
Symbol TJ Vin
Value –40 to +125 40
Unit °C V
SYSTEM PARAMETERS [Note 1] ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, Vin = 12 V for the 3.3 V, 5.0 V, and Adjustable version, Vin = 25 V for the 12 V version, and Vin = 30 V for the 15 V version. ILoad = 500 mA, TJ = 25°C, for min/max values TJ is the operating junction temperature range that applies [Note 2], unless otherwise noted.) www.DataSheet4U.com
Characteristics IL2575–3.3 ([Note 1] Test Circuit Figure 14) Output Voltage (Vin=12V, ILoad=0.2A, Tj=25°C) Output Voltage (4.75V ≤Vin ≤40V, 0.2A ≤ILoad ≤1.0A) TJ = 25°C TJ = –40 to +125°C Efficiency (Vin = 12V, ILoad = 1.0A) IL2575–5 [Note 1] Output Voltage (Vin=12V, ILoad=0.2A, Tj=25°C) Output Voltage (8.0V ≤Vin ≤40V, 0.2A ≤ILoad ≤1.0A) TJ = 25°C TJ = –40 to +125°C Efficiency (Vin = 12 V, ILoad = 1.0 A) IL2575–12 [Note 1] Output Voltage (Vin=25V, ILoad=0.2A, Tj=25°C) Output Voltage (15.0V ≤Vin ≤40V, 0.2A ≤ILoad ≤1.0A) TJ = 25°C TJ = –40 to +125°C Efficiency (Vin = 15V, ILoad = 1.0A) IL2575–15 [Note 1] Output Voltage (Vin=30V, ILoad=0.2A, Tj=25°C) Output Volta.