IL2575-XX IKSEMICON | Alldatasheet

Document overview

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Technical content

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

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

This device contains 162 active transistors. Figure 1. Block Diagram and Typical Application

(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 Symbol Value Unit Operating Junction Temperature Range TJ –40 to +125 °C Supply Voltage Vin 40 V SYSTEM PARAMETERS [Note 1]

ELECTRICAL CHARACTERISTICS

(Unless otherwise specified, Vin = 12 V for the 3.3 V, 5.0 V, and Adjustable version, V in = 25 V for the 12 V version, and V in = 30 V for the 15 V version. I Load = 500 mA, T J = 25°C, for min/max values T J is the operating junction temperature range that applies [Note 2], unless otherwise noted.) Characteristics Symbol Min Max Unit IL2575–3.3 ([Note 1] Test Circuit Figure 14) Output Voltage (Vin=12V, ILoad=0.2A, Tj=25°C) Vout 3.234 3.366 V Output Voltage (4.75V ≤Vin ≤40V, 0.2A ≤ILoad ≤1.0A) TJ = 25°C TJ = –40 to +125°C Vout 3.168 3.135 3.432 3.465 V Efficiency (Vin = 12V, ILoad = 1.0A) η 65 - % IL2575–5 [Note 1] Output Voltage (Vin=12V, ILoad=0.2A, Tj=25°C) Vout 4.9 5.1 V Output Voltage (8.0V ≤Vin ≤40V, 0.2A ≤ILoad ≤1.0A) TJ = 25°C TJ = –40 to +125°C Vout 4.8 4.75 5.2 5.25 V Efficiency (Vin = 12 V, ILoad = 1.0 A) η 67 - % IL2575–12 [Note 1] Output Voltage (Vin=25V, ILoad=0.2A, Tj=25°C) Vout 11.76 12.24 V Output Voltage (15.0V ≤Vin ≤40V, 0.2A ≤ILoad ≤1.0A) TJ = 25°C TJ = –40 to +125°C Vout 11.52 11.4 12.48 12.6 V Efficiency (Vin = 15V, ILoad = 1.0A) η 78 - % IL2575–15 [Note 1] Output Voltage (Vin=30V, ILoad=0.2A, Tj=25°C) Vout 14.7 15.3 V Output Voltage (18V ≤Vin ≤40V, 0.2A ≤ILoad ≤1.0A) TJ = 25°C TJ = –40 to +125°C Vout 14.4 14.25 15.6 15.75 V Efficiency (Vin = 12V, ILoad = 1.0A) η 78 - % IL2575 ADJUSTABLE VERSION [Note 1] Feedback Voltage (Vin=12V, ILoad =0.2A, Vout = 5.0V, TJ=25°C) Vout 1.217 1.243 V Feedback Voltage (8.0V ≤Vin ≤ 40V, 0.2A ≤ILoad ≤1.0A, Vout=5.0V) TJ = 25°C TJ = –40 to +125°C Vout 1.193 1.18 1.267 1.28 V Efficiency (Vin = 12V, ILoad = 1.0A, Vout = 5.0V) η 67 - % 1. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the IL2575 is used as shown in the test circuit 14, system performance will be as shown in system parameters section . 2. Tested junction temperature range for the IL2575: Tlow = –40°C Thigh = +125°C Rev. 00

(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.) Characteristics Symbol Min Max Unit ALL OUTPUT VOLTAGE VERSIONS Feedback Bias Current (Vout = 5.0 V [Adjustable Version Only]) TJ = 25°C TJ = –40 to +125°C Ib 100 500 nA Oscillator Frequency [Note 3] TJ = 25°C TJ = –40 to +125°C fosc kHz Saturation Voltage (Iout = 1.0 A [Note 4]) TJ = 25°C TJ = –40 to +125°C Vsat 1.8 2.0 V Max Duty Cycle (“on”) [Note 5] DC 93 – % Current Limit (Peak Current [Notes 3 and 4]) TJ = 25°C TJ = –40 to +125°C ICL 4.2 3.5 6.9 7.5 Output Leakage Current [Notes 6 and 7], TJ = 25°C Output = 0 V Output = –1.0 V IL 2.0 mA Quiescent Current [Note 6] TJ = 25°C TJ = –40 to +125°C IQ mA Standby Quiescent Current (ON/OFF Pin = 5.0 V (“off”)) TJ = 25°C Istby 200 uA ON/OFF Pin Logic Input Level Vout = 0 V TJ = 25°C TJ = –40 to +125°C Vout = Nominal Output Voltage TJ = 25°C TJ = –40 to +125°C VIH VIL 2.2 2.4 1.0 0.8 V ON/OFF Pin Input Current ON/OFF Pin = 5.0 V (“off”), TJ = 25°C ON/OFF Pin = 0 V (“on”), TJ = 25°C IIH IIL uA 3. The oscillator frequency reduces to approx imately 18 kHz in the event of an output short or an overload which causes the reg ulated output voltage to drop approximately 40% from the nominal output voltage. This self protection feature lowers the average dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%. 4. Output (Pin 2) sourcing current. No diode, inductor or capacitor connected to output pin. 5. Feedback (Pin 4) removed from output and connected to 0 V. 6. Feedback (Pin 4) removed from output and connected to +12 V fo r the Adjustable, 3.3 V, and 5.0 V versions, and +25 V for the 12 V and 15 V versions, to force the output transistor “off”. 7. Vin = 40 V. Rev. 00

5.0 Output Voltage Versions

Figure 14. Typical Test Circuits point grounding (as indicated) or ground plane construction should be used.

APPLICATION INFORMATION

Figure 15. Inverting Buck–Boost Regulator Using the output voltage and regulates it. sum of the input and output voltages and this must be limited to a maximum of 40 V. or less than the input voltage. topology, the available output current is lower. even for light loads. This may overload an input power source with a current limit less than 1.5 A. on the output voltage and size of the output capacitor. delayed startup or an undervoltage lockout circuit is recommended. switch–mode regulator begins to operate. The high input current needed for startup is now partially supplied by the input capacitor Cin. procedure has to be used to select the inductor L1 or the output capacitor Cout. input voltages or high output currents require a large value output capacitor (in the range of thousands of uF). voltage, and must not exceed 40 V.

Rev. 00

TO-220-5L (Bent Staggered) Rev. 00

Rev. 00