IL2595-XX IKSEMICON | Alldatasheet

Document overview

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Technical content

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, IQ typically 100µA
  • Thermal shutdown and current limit protection Functions
  • Simple high-efficiency step-down regulator
  • On-card switching regulators
  • Positive to negative converter

ORDERING INFORMATION

TA = -40° to 125° C for all packages TO-220-5L TO-263-5L TO-220-5L 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 mono lithic integrated circuits that prov ide 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% toleranc e on output voltage under specified input voltage and output load conditions, and ± 15% on the oscillator fr equency. 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 145oC with 5oC hysteresis. Rev. 00

(TA = 25oC) Characteristic Symbol Value Unit Maximum Input Supply Voltage VI 45 V ON/OFF Pin Input Voltage VIN -0.3 ≤ V ≤ +25 V Feedback Pin Voltage -0.3 ≤ V ≤ +25 V Output Voltage to Ground VO -1 V Power Dissipation PD Internally limited W Storage Temperature Range Tstg -65 to +150 oC Operating Temperature Range TJ 40 ≤ TJ ≤ +125 oC Operating Supply Voltage VIN 4.5 to 40 V Typical Aplication (Fixed Output Voltage Versions) Rev. 00

Electrical Characteristics

Unless otherwise specified, TJ = 25 oC VIN = 12V for the 3.3V, 5V, and Adjustable version and VIN = 25V for the 12V version. Characteristic Symbol Test Condition Min Typ Max Unit Output Voltage VOUT IL2595–3 4.75V ≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 1A 3.168 3.3 3.432 IL2595–5 7V ≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 1A 4.8 5.0 5.2 V IL2595–12 15V ≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 1A 11.52 12.0 12.48 Efficiency IL2595–3 ILOAD = 1A 78 η IL2595–5 ILOAD = 1A 82 % IL2595–12 VIN = 25V, ILOAD = 1A 90 IL2595–A VOUT = 3V, ILOAD = 1A 78 % Feedback Voltage VFB IL2595–A 4.5V ≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 1A VOUT programmed for 1.193 1.230 1.267 V Feedback Bias Current ID IL2595-A; VFB = 1.3V 10 50 nA Oscillator Frequency fO 127 150 173 kHz Saturation Voltage VSAT IOUT = 1A (Note 1,2) 1 1.2 V Max Duty Cycle (ON) DC (Note 2) 100 % Max Duty Cycle (OFF) (Note 3) 0 Current Limit ICL Peak Current (Note 1,2) 1.2 1.5 2.4 A Output Leakage Current IL Output = 0V (Note 1,3) 50 µA Output = -1V, VIN = 40V 2 15 mA Quiescent Current IQ (Note 3) 5 10 mA Standby Quiescent Current ISTBY ON/OFF pin = 5V (OFF), VIN = 40V 85 200 µA ON/OFF Pin Logic Input VIH Low (Regulator ON) 1.3 0.6 V Threshold Voltage VIL High (Regulator OFF) 2.0 ON/OFF Pin Input IH VLOGIC = 2.5V (regulator OFF) 5 15 µA Current IL VLOGIC = 0.5V (regulator ON) 0.02 5 Rev. 00

Electrical Characteristics (continue) Characteristic Symbol Test Condition Min Typ Max Unit Thermal Resistance θJC TO-220 or TO-263 Package Junction to Case 2 °C/W θJA TO-220 Package Junction to Ambient (Note 4) 50 °C/W θJA TO-263 Package Junction to Ambient (Note 5) 50 °C/W θJA TO-263 Package Junction to Ambient (Note 6) 30 °C/W θJA TO-263 Package Junction to Ambient (Note 7) 20 °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 in2. Note 5: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single printed circuit board with 0.5 in2 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 in2 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 in2 of (1 oz.) copper area on the IL2595S side of the board, and approximately 16 in2 of copper on the other side of the p-c board. Typical Performance Characteristics (circuit of Figure 1) Rev. 00

Typical Performance Characteristics (circuit of Figure 1) (continue) Rev. 00

Test Circuit and Layout Guidelines CIN —120 µF , 50V, Aluminum Electrolytic Nichicon “PL Series” COUT —120 µF , 25V Aluminum Electrolytic, Nichicon “PL Series” D1 —3A, 40V Schottky Rectifier, 1N5822 L1 —100 µH, L29 Figure1. Standard Test Circuits and Layout Guides As in any switching regulator, layout is very important. Rapidly switching currents associated with wiring inductance can generate voltage transients which can cause problems. For minimal inductance and ground loops, the wires indicated by heavy lines should be w ide printed circuit traces and should be kept as short as possible. For best results, external components should be located as close to the switcher lC as possible using ground plane construction or single point grounding. If open core inductors are used, special care must be taken as to the loca tion and positioning of this ty pe of inductor. Allowing the inductor flux to intersect sensitive feedback, lC groundpath and COUT wiring can cause problems. When using the adjustable version, spec ial care must be taken as to the lo cation of the feedback resistors and the associated wiring. Physically locate both resistors near the IC, and route the w iring away from the inductor, especially an open core type of inductor. Rev. 00

Rev. 00

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

Rev. 00