|Category||Power Management => Regulators => Linear Regulators|
|Description||1.5 Amp Low-dropout Regulator With Reset And Enable|
|Datasheet||Download SC1551 datasheet
The SC1551 high performance positive voltage regulator is designed for use in applications requiring low dropout performance to 1.5A. Additionally, the SC1551 provides excellent regulation over variations in line, load and temperature. Similar to Semtechs popular EZ1086, the SC1551 includes extra features for maximum flexibility - a low power shutdown mode and a power-on reset output. The active high enable pin, when pulled low, shuts the regulator down so that it draws less than 10µA from the input supply. The power-on reset output remains asserted low until 175ms (typical) after the output voltage rises above the reset threshold. When the output drops below the reset threshold, reset asserts low within 20µs (typical). Outstanding features include low dropout performance at rated current, fast transient response, internal current limiting and thermal shutdown protection of the output device. The SC1551 is available with two standard output voltage options, 2.5V and 3.3V. It comes in the popular 5 pin TO-263 surface mount package.
Low dropout voltage: 1.4V maximum.ull current rating over line and temperature.ast transient response ±3% total output regulation over line, load and temperature Active high enable input Power-on reset output with 175ms (typical) delay Line regulation typically 0.015% Load regulation typically 0.05% TO-263-5 surface mount packageApplications
Microcontroller power supplies Battery chargers Post regulators Battery chargers
Parameter Maximum Input Pin Voltage Power Dissipation Thermal Impedance Junction to Ambient Thermal Impedance Junction to Case Operating Ambient Temperature Range Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering) 10 Seconds Symbol VIN, VEN TA TJ TSTG TLEAD Maximum 7 Internally Limited +150 300 Units V W °C/W °C
Unless specified: 3.9V VIN 7.0V (2.5V option, 4.7V VIN 7.0V for the 3.3V option), VEN = VIN, 0A IOUT = 25°C. Values in bold apply over full operating temperature range.Parameter IN Supply Voltage (2.5V option) Supply Voltage (3.3V option) Quiescent Current
OUT Output Voltage(1) VOUT VIN = 5V, IOUT -1% -3% Line Regulation(1) REGLINE VIN = (VOUT(NOM) to 7V, IOUT 0mA 0.015 VOUT Load Regulation(1) REGLOAD VIN = 5V, IOUT 0.20 0.30 Dropout Voltage(1)(2) VD IOUT 1.3 1.4
Unless specified: 3.9V VIN 7.0V (2.5V option, 4.7V VIN 7.0V for the 3.3V option), VEN = VIN, 0A IOUT = 25°C. Values in bold apply over full operating temperature range.
Parameter OUT (Cont.) Current Limit(1) Temperature Coefficient Temperature Stability RMS Output Noise Ripple Rejection Ratio EN Enable Pin Control Voltage
R ST Reset Threshold VTH VOUT falling VOUT rising Reset Delay(3) tDLY(LO) tDLY(HI) Reset Output Voltage VOL VOH OVER TEMPERATURE PROTECTION High Trip Level Hysteresis THI THYST 10 °C VOUT falling VOUT rising VOUT VTH, IRST = -1.2mA VOUT = VOUT(NOM), IRST ms V %VOUT
Notes: (1) Low duty cycle pulse testing with Kelvin connections required. (2) VOUT, VRE. 1%. (3) Reset delay is measured from (VOUT = VTH) to (VRST 50%) - see Timing Diagram on page 4.
|Some Part number from the same manufacture Semtech Corporation|
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