Datasheet LT1120 (Analog Devices) - 8
| Hersteller | Analog Devices |
| Beschreibung | Micropower Regulator with Comparator and Shutdown |
| Seiten / Seite | 12 / 8 — TYPICAL APPLICATIO S. Regulator with Output Voltage Monitor. Compensating … |
| Dateiformat / Größe | PDF / 138 Kb |
| Dokumentensprache | Englisch |
TYPICAL APPLICATIO S. Regulator with Output Voltage Monitor. Compensating the Comparator as an Op Amp
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LT1120
U TYPICAL APPLICATIO S Regulator with Output Voltage Monitor
5 5V V 4 LT1120 IN V V OUT OUT 5V 500k 0.001μF 98k LOGIC – VOUT LOGIC 7 –INPUT 8 OUTPUT + PIN 7 2k 10μF + 2 LOGIC FB OUTPUT REF GND 100k 6 1 1120 TA03 LOGIC OUTPUT GOES LOW WHEN VOUT DROPS BY 100mV
Compensating the Comparator as an Op Amp 1A Low Dropout Regulator
VIN 50μA 6 + 7 2.2k 8 MJE2955 AT Av = 100, – 5 SLEW RATE = +0.05V/μs 4 * –6V/μs V V IN V OUT OUT 1M 5V LT1120 10k* 100k 0.001μF + R2 R1 2 FB 220μF† GND C2 C1 150 1 Ω* 100k 1120 TA04
Av R1 C1 C2 R2
1120 TA05 1 33Ω 0.1μF 0.001μF — * FOR CURRENT LIMIT ≈ 1.5A † MUST HAVE LOW ESR. SEVERAL 100μF CAPACITORS CAN BE PARALLELED. 10 100Ω 0.047μF — 100k 100 10k 0.002μF — 10k 1120fd 8
U TYPICAL APPLICATIO S Regulator with Output Voltage Monitor
5 5V V 4 LT1120 IN V V OUT OUT 5V 500k 0.001μF 98k LOGIC – VOUT LOGIC 7 –INPUT 8 OUTPUT + PIN 7 2k 10μF + 2 LOGIC FB OUTPUT REF GND 100k 6 1 1120 TA03 LOGIC OUTPUT GOES LOW WHEN VOUT DROPS BY 100mV
Compensating the Comparator as an Op Amp 1A Low Dropout Regulator
VIN 50μA 6 + 7 2.2k 8 MJE2955 AT Av = 100, – 5 SLEW RATE = +0.05V/μs 4 * –6V/μs V V IN V OUT OUT 1M 5V LT1120 10k* 100k 0.001μF + R2 R1 2 FB 220μF† GND C2 C1 150 1 Ω* 100k 1120 TA04
Av R1 C1 C2 R2
1120 TA05 1 33Ω 0.1μF 0.001μF — * FOR CURRENT LIMIT ≈ 1.5A † MUST HAVE LOW ESR. SEVERAL 100μF CAPACITORS CAN BE PARALLELED. 10 100Ω 0.047μF — 100k 100 10k 0.002μF — 10k 1120fd 8