LT1580 LINER [Linear Technology], LT1580 Datasheet
LT1580
Available stocks
Related parts for LT1580
LT1580 Summary of contents
Page 1
... The device can also be used as a single supply device where dropout is comparable to an LT1584. Several other new features have been added to the LT1580. A remote SENSE pin is brought out. This feature virtually eliminates output voltage variations due to load changes. ...
Page 2
... LT1580/LT1580-2 ABSOLUTE MAXIMUM V Input Voltage ................................................ 6V POWER V Input Voltage ........................................... 13V CONTROL Storage Temperature ............................ – 150 C Operating Junction Temperature Range Control Section LT1580C............................................ 125 C LT1580I ........................................ – 125 C U PACKAGE/ORDER INFORMATION FRONT VIEW 5 V POWER 4 V CONTROL TAB OUT ...
Page 3
... Control Pin Current: LT1580 V CONTROL (Note 4) V CONTROL V CONTROL V CONTROL V CONTROL V CONTROL V CONTROL V CONTROL Ground Pin Current: LT1580-2.5 V CONTROL ADJ Pin Current: LT1580 (V = 0V) V ADJ CONTROL Current Limit: LT1580-2.5 V CONTROL V CONTROL LT1580 (V = 0V) V ADJ CONTROL V CONTROL Ripple Rejection: LT1580-2 LT1580 ...
Page 4
... LOAD J Note 3: For the LT1580 adjustable device the minimum load current is the minimum current required to maintain regulation. Normally the current in the resistor divider used to set the output voltage is selected to meet the . For the LT1580 minimum load current requirement. ...
Page 5
... TEMPERATURE ( C) 1580 G05 V (Pin 5/6): This is the collector to the power device POWER of the LT1580. The output load current is supplied through this pin. For the device to regulate, the voltage at this pin must be between 0.1V and 0.8V greater than the output voltage (see Dropout specifications). V (Pin 4/3): This pin is the supply pin for the CONTROL control circuitry of the device ...
Page 6
... In many cases the input-output differential is very small, effectively disqualifying many of the low dropout regulators on the market today. The LT1580 is designed to make use of multiple power supplies, present in most systems, to reduce the dropout voltage. This two supply approach maximizes efficiency ...
Page 7
... The output can never come up unregulated. The LT1580 can also be operated as a single supply device by tying the control and power inputs together. Dropout in single supply operation will be determined by the mini- mum control voltage ...
Page 8
... Figure 2 or outside the loop as in Figure 1. This means that the LT1580 can control the voltage at the load as long as the input-output voltage is greater than the total of the dropout voltage of the LT1580 ...
Page 9
... W U Output Voltage The adjustable version of the LT1580 develops a 1.25V reference voltage between the SENSE pin and the ADJ pin (see Figure 5). Placing a resistor R1 between these two terminals causes a constant current to flow through R1 and down through R2 to set the overall output voltage. ...
Page 10
... W U pin and the V If the LT1580 is connected as a single supply device with POWER the V CONTROL internal diode between the V will protect the V Like any other regulator exceeding the maximum input to ...
Page 11
... Please consult Linear Technology’s “ Mount- ing Considerations for Power Semiconductors,” 1990 Linear Applications Handbook, Volume 1 , Pages RR3-1 to RR3-20. Note that the case of the LT1580 is electrically connected to the output The following example illustrates how to calculate maximum junction temperature ...
Page 12
... LT1580/LT1580-2.5 U TYPICAL APPLICATION 5V 3. 25V 0.33 F RTN 12 2.5V/6A Regulator POWER CONT 1 SENSE LT1580 V = 2.5V 3 OUT V OUT ADJ 220 F 110 + 10V 1% 100 F 10V + 110 100 F 1% 10V 25V MICROPROCESSOR 10 SOCKET V SS 1580 TA03 ...
Page 13
... LT1580/LT1580-2.5 0.165 – 0.180 0.045 – 0.055 (4.191 – 4.572) (1.143 – 1.397) 15 TYP 0.004 0.059 (1.499) 0.102 TYP 0.095 – ...
Page 14
... LT1580/LT1580-2.5 PACKAGE DESCRIPTION 0.390 – 0.415 (9.906 – 10.541) 0.460 – 0.500 (11.684 – 12.700) 0.057 – 0.077 0.028 – 0.038 (1.448 – 1.956) (0.711 – 0.965 Dimensions in inches (millimeters) unless otherwise noted. T Package 5-Lead Plastic TO-220 (Standard) (LTC DWG # 05-08-1421) 0.147 – ...
Page 15
... LT1580/LT1580-2.5 0.165 – 0.180 (4.191 – 4.572) 0.045 – 0.055 (1.143 – 1.397) 0.620 (15.75) TYP 0.095 – 0.115 (2.413 – ...
Page 16
... IN OUT + C1 12V 220 F LT1587 10V C8 ADJ 0 1N4148 470 LT1006 R4 – 178 1N4148 R14 SENSE CONTROL + C10 LT1580 POWER OUT ADJ 0.33 F 107 107 0.35% 0.25 10k Q1 89.8 ZVN4206 0.5% Q2 2N3904 E3 CPU TYPE 0 P55C 1 P54C ...