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GS-R1005 Dataheets PDF



Part Number GS-R1005
Manufacturers STMicroelectronics
Logo STMicroelectronics
Description 50W STEP-DOWN SWITCHING REGULATOR
Datasheet GS-R1005 DatasheetGS-R1005 Datasheet (PDF)

GS-R1005 50W STEP-DOWN SWITCHING REGULATOR Type GS-R1005 Vi 12 to 36 V Vo 5V Io 10 A FEATURES Wide input voltage range (12 to 36V) High efficiency (80% min.) Parallel operation with current sharing Synchronization Remote inhibit/enable Remote load voltage sense Output short-circuit protection Soft-start PCB or chassis mountable DESCRIPTION The GS-R1005 is a step-down switching voltage regulator suitable to provide 5V/10Aoutput voltage from a wide input voltage range (12 to 36V). ABSOLUTE MAXIM.

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GS-R1005 50W STEP-DOWN SWITCHING REGULATOR Type GS-R1005 Vi 12 to 36 V Vo 5V Io 10 A FEATURES Wide input voltage range (12 to 36V) High efficiency (80% min.) Parallel operation with current sharing Synchronization Remote inhibit/enable Remote load voltage sense Output short-circuit protection Soft-start PCB or chassis mountable DESCRIPTION The GS-R1005 is a step-down switching voltage regulator suitable to provide 5V/10Aoutput voltage from a wide input voltage range (12 to 36V). ABSOLUTE MAXIMUM RATINGS Symbol Vi Viinh Tcop Tstg DC Input Voltage High Inhibit voltage Operating Case Temperature Range Storage Temperature Range Parameter Value 40 28 0 to +75 – 20 to +105 Unit V V °C °C June 1994 1/7 GS-R1005 ELECTRICAL CHARACTERISTICS (Tamb = 25°C unless otherwise specified) Symbol Vi li lir Vien Viinh liinh Vo Vor δVOL δVOO ∆ Vo Io Iol Iosc δI o Parameter Input Voltage Input Current Reflected Input Current Enable Input Voltage Inhibit Input Voltage Inhibit Input Current Output Voltage Output Ripple Voltage Line Regulation Load Regulation Total Remote Sense Compensation Output Current* Output Current Limiting Short-circuit Output Current Current Sharing Deviation Soft-start Time Line Transient Recovery Time Load Transient Recovery Time Switching Frequency Efficiency Thermal Resistance Case-to-ambient Test Conditions Vo = 5.05V Vi = 24V Io = 1.2 to 10A Io = 10A Min 12 Typ 24 2.5 200 0 2 0.3 4.9 5.05 100 220 1.2 24 0.5 5.2 120 0.5 1 0.5 Vo = 5.05V 0 12.5 10 13.7 16 10 Max 36 Unit V A mApp V V mA V mVpp % % V A A A % Vi = 24V Io = 10A with external filter (C = 470µF) Vi = 12 to 36V Io = 1.2 to 10A Vi = 12 to 36V Io = 1.2 to 10A Vi = 12 to 36V Io =1.2 to 10A Viinh = 5V Vi = 12 to 36V Io = 1.2 to 10A Vi = 24V Io = 10A Vi = 12 to 36V Io = 10A Vi = 24V Vi = 24V Io = 10A Vi = 12 to 36V Vi = 12 to 36V Vi = 24V Vi = 24V Io = 2 to 10A two modules in parallel Vi = 24V Io = 10A Io = 1.2 to 10A tss tr1 tr2 fs η R thc 15 60 100 100 80 83 7.5 ms µs µs kHz % °C/W Vi = 12 to 36V Io = 5A Vi = 24V Vi = 24V Io = 1.2 to 10A Io = 1.2 to 10A Io = 10A Vi = 12 to 36V * Note: when output current is less than 1.2A, output ripple voltage increases due to discontinuous operation. 2/7 GS-R1005 CONNECTION DIAGRAM AND MECHANICAL DATA Package R. Dimensions in mm (inches). PIN DESCRIPTION Pin 1 2 3 4,5 6 7 8 9 10,11 Function GND Input Inhibit + Vin + Vout + Sense Sync Parallel - Sense GND Output Description Return for input voltage source. Internally connected to pin 10,11. The converter is ON (Enable) when this pin is unconnected or the voltage applied is lower than 1.2V. The converter is OFF (Inhibit) for a control voltage in the range of 2 to 24V. DC Input voltage; recommended maximum voltage is 36V. External capacitor between pin 3 and pin 1 is mandatory; recommended value is 470µF/50V for switching application. +5V output voltage. Senses the remote load high side. To be connected to pin 4,5 when remote sense is not used. Synchronization output. See figures 1,2,3,4. Open when not used. Parallel output. See figures 1,2,3,4. Open when not used. Senses the remote load return. To be connected to pin 10,11 when remote sense is not used. In parallel configuration, take care to connect all -S pins together (see figures 1,2,3,4). Return for output current path. Internally connected to pin 1. 3/7 GS-R1005 USER NOTES Input Voltage The recommended operating maximum DC input voltage is 36V inclusive of the ripple voltage. The use of an external low ESR, high ripple current capacitor located as close the module as possible is mandatory; recommended value is 470µF/50V. Softstart To avoid heavy inrush current the output voltage rise time is typically 15ms in any condition of load. Remote Sensing The remote voltage sense compensation range is for a total drop of 500mV equally shared between the load connecting wires. It is a good practice to shield the sensing wires to avoid oscillations. See the connection diagram on figures 1, 2, 3, 4. Parallel Operation To increase available output regulated power, the module features the parallel connection possibility with equal current sharing and maximum deviation of 10% (two modules in parallel). See the connection diagram on figures 1, 2, 3, 4. Module Protection The module is protected against occasional and permanent shortcircuits of the output pins to ground, as well as against output current overload. It uses a current limiting protection circuitry, avoiding latch-up problems with certain types of loads. Figure 1. Figure 2. 4/7 GS-R1005 Figure 3. Figure 4. Thermal characterist ics: how to choose the heat-sink Sometimes the GS-R1005 requires an external heat-sink dependingon both operatingtemperature conditions and power. Before entering into calculations details, some basic concepts will be explained to better understand the problem. The thermal resistance between two points is represented by their temperature difference in front of a specified dissipated power, and it is expressed in Degr.


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