LP2951-50DR ADJUSTABLE MICROPOWER VOLTAGE REGULATORS WITH SHUTDOWN
diode rectifier circuit
,bridge rectifier circuit
Stock List
| TSOP34838 | 5350 | VISHAY | 16+ | DIP3 |
| LM2577T-ADJ | 5390 | NSC | 16+ | TO-220 |
| BZD27-C160 | 5400 | 16+ | SOD87 | |
| T6818 | 5400 | ATMEL | 16+ | SOP14 |
| FDS6690A | 5411 | FAIRCHILD | 14+ | SOP8 |
| AT24C1024BW-SH25 | 5420 | ATMEL | 16+ | SOP8 |
| PC923 | 5500 | SHARP | 16+ | DIP/SOP |
| ST95P08C3 | 5500 | ST | 15+ | SOP-8 |
| IRLL014TR | 5510 | IR | 16+ | SOT223 |
| IC62LV12816LL-70T | 5512 | ICSI | 15+ | TSSOP |
| MCP2551-I/P | 5521 | MICROCHIP | 12+ | DIP8 |
| 74HC14 | 5540 | TI | 16+ | SOP-14 |
| ATMEGA128-16AU | 5550 | ATMEL | 12+ | QFP64 |
| BTW68-1200 | 5550 | ST | 16+ | TO-3P |
| KA278R33CTU | 5577 | FAIRCHILD | 16+ | TO-220 |
| MC10ELT25DR2G | 5577 | ON | 16+ | SOP8 |
| HCNW2611-500E | 5600 | AVAGO | 16+ | SOP8 |
| STA401A | 5700 | SANKEN | 16+ | ZIP |
| TC4S11F | 5700 | TOSHIBA | 14+ | SOT-353 |
| DG211CJ | 5701 | INTERSIL | 16+ | DIP-16 |
| UPD4991AGS | 5702 | NEC | 16+ | SOP20 |
| MAX3222IPWR | 5710 | TI | 15+ | TSSOP20 |
| GT15J101 | 5712 | TOSHIBA | 16+ | TO3P |
| FAN3227TM | 5720 | FAIRCHILD | 15+ | SOIC-8 |
| G6653 | 5757 | STR | 12+ | TO-220 |
| CD4066BCMX | 5777 | NS | 16+ | SOP |
| DS1305EN | 5789 | MAXIM | 12+ | TSSOP |
| 30344* | 5800 | BOSCH | 16+ | QFP |
| BD139 | 5800 | PHI | 16+ | TO-126 |
| TD62783APG | 5800 | TOSHIBA | 16+ | DIP18 |
| UC3844BDR2G | 5800 | ON | 16+ | SOP-14 |
| M25PE20-VMN6 | 5820 | ST | 16+ | SOP8 |
| BSZ040N04LSG | 5822 | 14+ | S3O8 | |
| 24LC04BT-I/SN | 5850 | MICROCHIP | 16+ | SOP-8 |
| PS2801-4 | 5850 | NEC | 16+ | SOP16 |
| HCF4538BM1 | 5871 | ST | 15+ | SOP16 |
| IRGBC30S | 5886 | IR | 16+ | TO-220 |
| HSMS-282K | 5887 | AGILENT | 15+ | SOT-363 |
| 1N5822 | 6000 | TOSHIBA | 12+ | DO201AD |
| ATMEGA128L-8AU | 6000 | ATMEL | 16+ | QFP64 |
| BB148 | 6000 | 12+ | SOD-323 | |
| BC807W | 6000 | DIODES | 16+ | SOT323 |
| BF824 | 6000 | PHILIPS | 16+ | SOT-23 |
| C106M | 6000 | ON | 16+ | TO-126 |
LP2951-50DR
ADJUSTABLE MICROPOWER VOLTAGE REGULATORS WITH SHUTDOWN
FEATURES
• Wide Input Range…up to 30 V
• Rated Output Current of 100 mA
•Low Dropout…380 mV (Typ) at 100 mA
• Low Quiescent Current…75 µA (Typ)
•Tight Line Regulation…0.03% (Typ)
•Tight Load Regulation…0.04% (Typ)
• High VO Accuracy
– 1.4% at 25°C
– 2% Over Temperature
•Can Be Used as a Regulator or Reference
• Stable With Low ESR (>12 mΩ) Capacitors
•Current- and Thermal-Limiting Features
•LP2950 Only (3-Pin Package)
– Fixed-Output Voltages of 5 V, 3.3 V
DESCRIPTION/ORDERING INFORMATION
The LP2950 and LP2951 devices are bipolar, low-dropout voltage regulators that can accommodate a wide input supply-voltage range of up to 30 V. The easy-to-use, 3-pin LP2950 is available in fixed-output voltages of 5 V, 3.3 V, and 3 V. However, the 8-pin LP2951 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951 outputs a fixed 5 V, 3.3 V, or 3 V (depending on the version). Alternatively, by leaving the SENSE and VTAP pins open and connecting FEEDBACK to an external resistor divider, the output can be set to any value between 1.235 V to 30 V.
The 8-pin LP2951 also offers additional functionality that makes it particularly suitable for battery-powered applications. For example, a logic-compatible shutdown feature allows the regulator to be put in standby mode for power savings. In addition, there is a built-in supervisor reset function in which the ERROR output goes low when VOUT drops by 6% of its nominal value for whatever reasons – due to a drop in VIN, current limiting, or thermal shutdown.
The LP2950 and LP2951 are designed to minimize all error contributions to the output voltage. With a tight output tolerance (0.5% at 25°C), a very low output voltage temperature coefficient (20 ppm typical), extremely good line and load regulation (0.3% and 0.4% typical), and remote sensing capability, the parts can be used as either low-power voltage references or 100-mA regulators.
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