|Category||Power Management => Regulators => Linear Regulators|
|Description||1.0 a Low-dropout Voltage Regulator With Enable|
|Datasheet||Download SC1541 datasheet
|Cross ref.||Similar parts: MIC39101|
The is a high performance low dropout positive voltage regulator designed for use in applications where power management is critical, such as battery powered systems. Additionally, the SC1541 provides excellent regulation over variations in line, load and temperature. Outstanding features include low dropout performance at rated current, fast transient response, internal current limiting and thermal shutdown protection of the output device. A very low quiescent current 10µA in shutdown mode reduces power dissipation.
Low dropout performance, 1.3V max.ull current rating over line and temperature.ast transient response +2% total output regulation over line, load and temperature 10µA max. quiescent current in shutdown Three fixed output voltages Line regulation 0.2% max. Load regulation 0.4% max. SO-8 and TO-263 packagesApplications
Low voltage microcontrollers Switching power supply post-regulation Instantly available circuits Motherboards Battery operated equipment
K The SC1541 is available with three different voltage K options as standard and two package options, SO-8 and TO-263. K
Notes: (1) Input and output capacitors should be located close to the device. (2) Connect all pins to PCB (SO-8 package) for optimal thermal characteristics. (3) Increasing the output capacitor value will improve the overall transient response. (4) The device is enabled when VEN = VIN, and shut down when EN is pulled to ground. EN should not be taken higher than VIN. A CMOS signal referenced to VIN would be ideal for switching the SC1541 on and off.
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 Maximum Input Pin Voltage Power Dissipation Thermal Resistance Junction to Case SO-8 TO-263 Thermal Resistance Junction to Ambient SO-8(1) TO-263 Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 SecNote: (1) 1 inch square of 1/16.R-4, double sided, 1 oz. minimum copper weight.
Unless otherwise specified: to 1A, VEN = VIN, 1.8V Option: VIN 7.0V, 2.5 Option: VIN 7.0V, 3.3V Option: VIN to 7.0V. Values in bold apply over full operating temperature range.Line Regulation(1) Load Regulation(1) Dropout Voltage(1)(2) Current Limit(1) Quiescent Current
PRELIMINARY POWER MANAGEMENT Electrical Characteristics (Cont.)
Unless otherwise specified: to 1A, VEN = VIN, 1.8V Option: VIN 7.0V, 2.5 Option: VIN 7.0V, 3.3V Option: VIN to 7.0V. Values in bold apply over full operating temperature range.
Parameter Temperature Coefficient Temperature Stability RMS Output Noise(3) Ripple Rejection Ratio(4)
Notes: (1) Low duty cycle pulse testing with Kelvin connections required. (2) VOUT, VRE. 1%. (3) Bandwidth (4) 120Hz input ripple. (5) This device is ESD sensitive. Use of standard ESD handling precautions is required.
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