LP3874 0.8A Fast Ultra Low Dropout Linear Regulators
| LP3874-ADJ | Adjustable Output Version |
| LP38841-ADJ | 75mV Dropout, Adjustable Output, 5.5Vin Max |
| LP38851 | New! National's LP38k Family Of High |
| LP38852 | Performance LDOs Power Digital ICs |
| LP38853 | See More At LDO.NATIONAL.COM |
LP3874 特性Features
- Ultra low dropout voltage
- Low ground pin current
- Load regulation of 0.04%
- 10nA quiescent current in shutdown mode
- Guaranteed output current of 0.8A DC
- Available in TO-263, TO-220 and SOT-223 packages
- Output voltage accuracy ± 1.5%
- Error# flag indicates output status
- Sense option improves load regulation
- Minimum output capacitor requirements
- Overtemperature/overcurrent protection
- -40°C to +125°C junction temperature range
LP3874 概述Description
| Paramaters / Values | LP3874 | LP3874-ADJ | LP38841-ADJ | LP38851 | LP38852 | LP38853 |
|---|---|---|---|---|---|---|
| Output Current | 800 mA | 800 mA | 800 mA | 800 mA | 1500 mA | 3000 mA |
| Output Min | 1.8, 2.5, 3.3, 5 Volt | 1.216 Volt | 0.56 Volt | 0.80 Volt | 0.8 Volt | 0.8 Volt |
| Input Min Voltage | 2.5 Volt | 2.5 Volt | 0.635 Volt | 0.915 Volt | 0.93 Volt | 1.04 Volt |
| Input Max Voltage | 7 Volt | 7 Volt | 5.5 Volt | 5.5 Volt | 5.5 Volt | 5.5 Volt |
| Dropout Voltage | 0.24 Volt | 0.24 Volt | 0.075 Volt | 0.115 Volt | 0.130 Volt | 0.240 Volt |
| Adjustable Output | No | Yes | Yes | Yes | Yes | Yes |
| Quiescent Current | 5 mA | 6 mA | 32 mA | 10 mA | 10 mA | 10 mA |
| On/Off Pin | Yes | Yes | Yes | Yes | Yes | Yes |
| Error Flag | No | No | No | No | No | No |
| RegType | LDO | LDO | LDO | LDO | LDO | LDO |
| Temperature Min | -40 deg C | -40 deg C | -40 deg C | -40 deg C | -40 deg C | -40 deg C |
| Temperature Max | 125 deg C | 125 deg C | 125 deg C | 125 deg C | 125 deg C | 125 deg C |
| Output Voltage | 1.8, 2.5, 3.3, 5 Volt | |||||
| Output Max | 1.8, 2.5, 3.3, 5 Volt | 6.76 Volt | 1.5 Volt | 1.80 Volt | 1.8 Volt | 1.8 Volt |
The LP3871/LP3874 series of fast ultra low-dropout linear regulators operate from a +2.5V to +7.0V input supply. Wide range of preset output voltage options are available. These ultra low dropout linear regulators respond very quickly to step changes in load, which makes them suitable for low voltage microprocessor applications. The LP3871/LP3874 are developed on a CMOS process which allows low quiescent current operation independent of output load current. This CMOS process also allows the LP3871/LP3874 to operate under extremely low dropout conditions.
Dropout Voltage: Ultra low dropout voltage; typically 24mV at 80mA load current and 240mV at 0.8A load current.
Ground Pin Current: Typically 6mA at 0.8A load current.
Shutdown Mode: Typically 10nA quiescent current when the shutdown pin is pulled low.
Error# Flag: Error# flag goes low when the output voltage drops 10% below nominal value.
SENSE: Sense pin improves regulation at remote loads.
Precision Output Voltage: Multiple output voltage options are available ranging from 1.8V to 5.0V with a guaranteed accuracy of ±1.5% at room temperature, and ±3.0% over all conditions (varying line, load, and temperature).
LP3874 应用Applications
- Microprocessor power supplies
- GTL, GTL+, BTL, and SSTL bus terminators
- Power supplies for DSPs
- SCSI terminator
- Post regulators
- High efficiency linear regulators
- Battery chargers
- Other battery powered applications
LP3874 功能框图Diagrams
芯片订购型号
| Part Number(s) (NSID) | Top View | Availability | Budgetary Pricing | Pack Size |
|---|---|---|---|---|
| LP3874EMP-1.8/NOPB LP3874EMP-1.8 |
SOT-223 | Full production Lead Time: 16 weeks | $1.01 each at 1K+ pcs | reel of 1000 |
| LP3874EMP-2.5/NOPB
LP3874EMP-2.5 |
SOT-223 | Full production Lead Time: 16 weeks | $1.01 each at 1K+ pcs | reel of 1000 |
| LP3874EMP-3.3/NOPB
LP3874EMP-3.3 |
SOT-223 | Full production Lead Time: 16 weeks | $1.01 each at 1K+ pcs | reel of 1000 |
| LP3874EMP-5.0/NOPB
LP3874EMP-5.0 |
SOT-223 | Full production Lead Time: 16 weeks | $1.01 each at 1K+ pcs | reel of 1000 |
| LP3874EMPX-1.8/NOPB LP3874EMPX-1.8 |
SOT-223 | Full production Lead Time: 12 weeks | $1.01 each at 1K+ pcs | reel of 2000 |
| LP3874EMPX-2.5/NOPB
LP3874EMPX-2.5 |
SOT-223 | Full production Lead Time: 12 weeks | $1.01 each at 1K+ pcs | reel of 2000 |
| LP3874EMPX-3.3/NOPB
LP3874EMPX-3.3 |
SOT-223 | Full production Lead Time: 12 weeks | $1.01 each at 1K+ pcs | reel of 2000 |
| LP3874EMPX-5.0/NOPB
LP3874EMPX-5.0 |
SOT-223 | Full production Lead Time: 16 weeks | $1.01 each at 1K+ pcs | reel of 2000 |
| LP3874ES-2.5/NOPB
LP3874ES-2.5 |
 TO-263 |
Full production Lead Time: 16 weeks | $1.22 each at 1K+ pcs | rail of 45 |
| LP3874ES-3.3/NOPB
LP3874ES-3.3 |
TO-263 |
Full production Lead Time: 16 weeks | $1.22 each at 1K+ pcs | rail of 45 |
停产产品Obsolete Versions
| Obsolete Part | Alternate Part or Supplier | Source | Last Time Buy Date |
|---|---|---|---|
| LP3874ES-1.8 | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |
| LP3874ES-5.0 | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |
| LP3874ESX-1.8 | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |
| LP3874ESX-2.5 | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |
| LP3874ESX-3.3 | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |
| LP3874ESX-5.0 | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |
| LP3874ET-1.8 | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |
| LP3874ET-2.5 | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |
| LP3874ET-3.3 | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |
| LP3874ET-5.0 | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |
| LP3874ET-ADJ | NONE | NATIONAL SEMICONDUCTOR | 01 Dec 2009 |