V78XX-1000 CUI | Alldatasheet

Document overview

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Technical content

rev. page date rev. page date DESCRIPTION: DC switching regulator, non-isolated 1 of 4 PART NUMBER: V78XX-1000 series

features

  • efficiency up to 95%
  • no need for heatsinks
  • wide input range
  • short circuit protection
  • thermal shutdown
  • low ripple and noise
  • pin compatible to LM78XX series
  • non-isolated model input voltage output output efficiency number range voltage current Vin_min Vin_max V7803-1000 4.75~28 Vdc 3.3 Vdc 1000 mA 90% 83% V7805-1000 6.5~32 Vdc 5 Vdc 1000 mA 93% 88% V7806-1000 8~32 Vdc 6.5 Vdc 1000 mA 94% 90% V7809-1000 11~32 Vdc 9 Vdc 1000 mA 95% 92% V7812-1000 15~32 Vdc 12 Vdc 1000 mA 95% 94% OUTPUT SPECIFICATIONS item conditions min. typ. max. unit output voltage accuracy at 100% load ±2 ±3 % line regulation Vin = min. to max. at full load ±0.2 ±0.4 % load regulation 10% to 100% full load ±0.4 ±0.6 % output ripple 20 MHz bandwidth, output w/ 10 μF cap 20 35 mVp-p short circuit protection continuous, auto recovery upon removal of short short circuit input power load impedance is ≤ 0.1 Ω 0.5 1.2 W output current limit subject to over-temp shutdown 2000 mA switching frequency fixed switching frequency topology 280 330 450 KHz dynamic load stability 100%<->10% load ±100 mV quiescent current Vin_min to Vin_max at no load 5 7 mA thermal shutdown internal IC junction 150 °C temperature coefficient -40°C ~ 85°C ambient 0.02 %/°C max load capacitance 2000 μF GENERAL SPECIFICATIONS item conditions min. typ. max. unit operating temperature range see derating curve -40 85 °C operating case temperature -40 100 °C storage temperature range -55 125 °C cooling free air convection solderability 1.5 mm from case for 10 seconds 300 °C storage humidity range relative humidity, non-condensing 10 95 % case material plastic (UL94-V0) case thermal impedance 50 °C/W MTBF at 25°C per MIL-HDBK-217F 2,000,000 hours package weight 3.7 grams

description

The V78XX series of switching regulators are designed to replace 78XX linear regulators, with the objective of drop-in replacement without the need for a heatsink, because the V78XX series features high efficiency under all line conditions. Built-in short-circuit and over-temperature protections ensure very rugged operations. Additionally, low ripple and noise performance make the parts useful in a wide range of applications.

rev. page date DESCRIPTION: DC switching regulator, non-isolated 2 of 4 PART NUMBER: V78XX-1000 series MECHANICAL DRAWINGS 3+ V o u t GND +Vin 0.100 (2 plcs) 2.54 3.21 0.126 (3 PLCS) 2.15 0.085 5.08 0.200 213 0.020 4.10 (3 PLCS) 0.45311.50 17.50 0.689 (TYP) 0.50 0.50 0.020 (3 PLCS) 8.90 0.350 0.30 0.012 (3 PLCS) PIN ASSIGNMENTS Recommended PCB Layout Pattern units: mm(inches) pin tolerances: ±0.10(±0.004) general tolerances: ±0.25(±0.01) 123 2.54 [0.100] Top View 1.00 +0.15/-0 [0.040 +0.006/-0] 2.54 [0.100] 1 23 THERMAL DERATING CURVE Operating Temp.( )C Temperature Derating Graph

rev. page date DESCRIPTION: DC switching regulator, non-isolated 3 of 4 PART NUMBER: V78XX-1000 series TYPICAL APPLICATION CIRCUIT V78XX-10001

100 F/25Vμ22 F/50Vμ

INPUT CAPACITOR (C1): A low ESR capacitor is recommended to keep the noise at the converter to a minimum. Ceramic capacitors are preferred but tantalum or low ESR electrolytic capacitors may also suffice. Place C1 as close as possible to pins 1 & 2. OUTPUT CAPACITOR (C2): A 100μF/25V electrolytic capacitor is recommended. NOT FOR PARALLEL OPERATION This converter is not designed for parallel operation with another to increase output power. TEST CIRCUIT + +Vin GND +Vout DC Power Source Current Meter Voltage Meter Cin DC/DC Converter Cout Twisted 30cm, 18AWGA B C01 C02 AA A BB B Current Meter Voltage Meter Electronic Load 20MHz Oscilloscope 1. Cin = 10μF / 50V for 500mA and 22μF / 50V for 1A, Cout = 100μF / 16V. 2. C01 = 10μF / 50V Electrolytic, C02 = 0.1μF / 50V Ceramic. 3. All points labeled A refer to one junction. 4. All points labeled B refer to one junction. 5. Use a short ground loop for probing. Do not use a wired ground clip. FOR EFFICIENCY & RIPPLE GRAPHS (PAGE4)

rev. page date DESCRIPTION: DC switching regulator, non-isolated 4 of 4 PART NUMBER: V78XX-1000 series EFFICIENCY AND RIPPLE Efficiency VS Vin(Full Load) 100 4 . 7 5 8 1 21 62 02 42 83 2 V i n ( V ) 4.75 8 12 16 20 24 28 32 Vin (V) 100 40 80 200 400 600 800 1000 1200 40 80 200 400 600 800 1000 1200 100 40 80 200 400 600 800 1000 1200 40 80 200 400 600 800 1000 1200 V7803-1000 V7805-1000 V7812-1000 V7803-1000 V7805-1000 V7812-1000 V7803-1000 V7805-1000 V7812-1000 V7803-1000 V7805-1000 V7812-1000 V7803-1000 V7805-1000 V7812-1000 V7803-1000 V7805-1000 V7812-1000 Efficiency (%) Ripple (mVpp) Ripple vs. Vin ( Full Load) Efficiency Output Ripple Ripple (mVpp) Efficiency (%)Efficiency (%) Efficiency vs. Load (Vin=Vin_min) Output Current(mA) Ripple vs. Load (Vin=Vin_min) Output Current (mA) Efficiency vs. Load (Vin=Vin_max) Output Current (mA) Ripple vs. Load (Vin=24V) Output Current (mA)