|Category||Power Management => Regulators => Linear Regulators|
|Description||Very Low Dropout 1.5 Amp Regulator With Enable|
|Datasheet||Download SC1565IST-1.8 datasheet
The is a high performance positive voltage regulator designed for use in applications requiring very low dropout voltage to 1.5 Amps. Since it has superior dropout characteristics compared to regular LDOs, it can be used to supply 2.5V on motherboards 2.8V on peripheral cards from the 3.3V supply thus allowing the elimination of costly heatsinks. Additionally, the 5-lead TO-220/TO-263 and SO-8 versions have an enable pin to further reduce power dissipation while shut down. The SC1565 provides excellent regulation over variations in line, load and temperature. The SC1565 is available SOT-223, 3 and 5 lead TO-220 and 3 and 5 lead TO-263 packages. Three lead packages are available with 1.8V and 2.5V fixed output options only. The SO-8, TO-220-5 and TO-263-5 are available with 1.8V and 2.5V internally preset outputs that are also adjustable using external resistors.Features
350mV dropout @ 1.5A Adjustable output from 4.8V(1) 2.5V and 1.8V options (adjustable externally
using resistors)(1) Over current and over temperature protection Enable pin(1) 10µA quiescent current in shutdown(1) Low reverse leakage (output to input) Surface mount and through-hole packages Full industrial temperature range TO-263, SOT-223 and SO-8 Packages Note: SO-8, TO-220-5 and TO-263-5 packages only.Applications
Battery powered systems Motherboards Peripheral cards Network cards Set Top Boxes Medical Equipment Notebook Computers
Notes: (1) Maximum VO setpoint for 1.8V parts 5.4V. (2) This device is designed to operate with ceramic input and output capacitors.
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied.
Parameter Input Voltage Power Dissipation Thermal Resistance Junction to Ambient TO-220-X TO-263-X Thermal Resistance Junction to Case TO-220-X, TO-263-X Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 Sec. ESD Rating (Human Body Model)Note: (1) 1 square inch of FR-4, double sided, 1 oz. minimum copper weight.
Unless specified: VEN = VIN. Adjustable Option (VADJ > VTH(ADJ)): VIN to 5.5V and to 1.5A. Fixed Options (VADJ = GND): VIN = (VO to 5.5V and to 1.5A. Values in bold apply over the full operating temperature range.Parameter VIN Supply Voltage Range Quiescent Current
VO Output Voltage(1) (Internal Fixed Voltage) Line Regulation(1) Load Regulation(1) Dropout Voltage(1)(2) REG(LINE) REG(LOAD) VD VIN = (VO to 5.5V, IOUT = 10mA VIN 10mA VO VIN 300 400
Unless specified: VEN = VIN. Adjustable Option (VADJ > VTH(ADJ)): VIN to 5.5V and to 1.5A. Fixed Options (VADJ = GND): VIN = (VO to 5.5V and to 1.5A. Values in bold apply over the full operating temperature range.Adjust Pin Current(4) Adjust Pin Threshold(5) EN Enable Pin Current Enable Pin Threshold
Over Temperature Protection High Trip level Hysteresis THI THYST 20 °C
Notes: (1) Low duty cycle pulse testing with Kelvin connections required. (2) Defined as the input to output differential at which the output voltage drops to 1% below the value measured at a differential 0.7V. (3) Required to maintain regulation. Voltage set resistors R1 and R2 are usually utilized to meet this requirement. Adjustable versions only. (4) Guaranteed by design. (5) When VADJ exceeds this threshold, the "Sense Select" switch disconnects the internal feedback chain from the error amplifier and connects VADJ instead.
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