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ILC7281 데이터시트(PDF) 1 Page - Impala Linear Corporation |
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ILC7281 데이터시트(HTML) 1 Page - Impala Linear Corporation |
1 / 9 page The ILC7281 provides two independant 150mA low dropout (LDO) voltage regulators and power supply reset monitor in an 8-pin MSOP package. Each regulator output is inde- pendantly short circuit protected and has independant shut- down. The device offers a unique combination of low dropout voltage and low quiescent current of CMOS and low noise and high ripple rejection characteristics of bipolar LDO regulators. Moreover, only one input capacitor is required. The power supply reset monitor is available in a ±1% accurate trip voltage to fit most microprocessor appli- cations. Even though its output can sink 2mA, the monitor draws only 1µA in normal operation. Additionally, a built-in hysteresis of 5% of detect voltage simplifies system design. Dropout Voltage: Typically 150mV at 150mA load, and 1mV at 1mA load. Ground pin current: Typically 20µA at 1mA load, and 30µA at 150mA load. Ripple rejection: 75dB at 1kHz and 60dB at 100kHz. Shutdown mode: Less than 0.5µA quiescent current in shutdown mode. Small package: 8-pin MSOP. Small capacitor: Requires only a 0.47µF external cpacitor on the regulator output. Precision output: Output voltage trimmed to 1% accuracy. ILC7281 Micropower Dual 150mA CMOS RF LDO™ Regulators with Power Supply Reset Monitor Impala Linear Corporation Impala Linear Corporation 1 (408) 574-3939 www.impalalinear.com Nov 2000 ILC7281 1.0 Advance • Guaranteed 150mA output per regulator • Ultra low 150mV dropout at 150mA • 1% output voltage accuracy • Built-in hysteresis of 5% of detection voltage • Requires only 0.47µF output capacitor • Only 30µA ground current at 150mA load • 75dB ripple rejection at 1kHz (COUT = 0.47µF) • 80µVRMS noise at BW = 300Hz to 50kHz • Excellent line and load transient rsponse • Over current / over temperature protection • 8-pin MSOP package • -80dB cross talk • Cellular Phones, pagers and wireless headsets • Microprocessor reset circuits • Palmtops, oragnizers, PDA’s and portable electronics • Microprocessor reset circuits • Battery powered portable appliances • Memory battery back-up circuitry V IN 1µF ceramic 0.47-2.2µF ceramic + + V OUTB C NOISE 470pF + + 10K V OUT RESET GND V OUTA EN A 0.47-2.2µF ceramic EN B Ordering Information* (TA = -40°C to +85°C) ILC7281CS-2530 150mA 2.5V and 3.0V LDO regulators with 2.7V detect fail voltage (VDF) Monitor Note: Enable may be connected to VIN, CNOISE connects to both LDO’s General Description Features Applications Figure 1 |
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