LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23
| LM2733 | Has A 40V / 1A Internal FET SOT-23 Package |
| LM2735 | Increased Switch Current At 2.1A |
LM2731 特性Features
- 22V DMOS FET switch
- 1.6 MHz (“X”), 0.6 MHz (“Y”) switching frequency
- Low RDS(ON) DMOS FET
- Switch current up to 1.8A
- Wide input voltage range (2.7V–14V)
- Low shutdown current (<1 µA)
- 5-Lead SOT-23 package
- Uses tiny capacitors and inductors
- Cycle-by-cycle current limiting
- Internally compensated
LM2731 概述Description
The LM2731 switching regulators are current-mode boost converters operating at fixed frequencies of 1.6 MHz (“X” option) and 600 kHz (“Y” option).
The use of SOT-23 package, made possible by the minimal power loss of the internal 1.8A switch, and use of small inductors and capacitors result in the industry's highest power density. The 22V internal switch makes these solutions perfect for boosting to voltages up to 20V.
These parts have a logic-level shutdown pin that can be used to reduce quiescent current and extend battery life.
Protection is provided through cycle-by-cycle current limiting and thermal shutdown. Internal compensation simplifies design and reduces component count.
LM2731 开关频率Switch Frequency
| X | Y |
|---|---|
| 1.6 MHz | 0.6 MHz |
LM2731 应用Applications
- White LED Current Source
- PDA’s and Palm-Top Computers
- Digital Cameras
- Portable Phones and Games
- Local Boost Regulator
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LM2731性能参数Parametrics
| Paramaters / Values | LM2731 | LM2733 | LM2735 |
|---|---|---|---|
| Output Range | 1.23V to 22V | Vin to 40V | Vin to 24 |
| Switch Current | 1.5 Amp | 1 Amp | 2.25 Amp |
| Input Min Voltage | 2.7 Volt | 2.7 Volt | 2.7 Volt |
| Input Max Voltage | 14 Volt | 14 Volt | 5.5 Volt |
| Frequency Max | 600, 1600 kHz | 600, 1600 kHz | 1700, 550 kHz |
| Output Min | 1.23 Volt | 3 Volt | 3 Volt |
| Output Max | 22 Volt | 40 Volt | 24 Volt |
| Efficiency (peak) | 90 % | 90 % | |
| Sync Pin | No | No | No |
| Adj Switch Frequency | No | No | No |
| Frequency Min | 600, 1600 kHz | 600, 1600 kHz | 475, 1500 kHz |
| On/Off Pin | Yes | Yes | Yes |
| PowerGood / Error Flag | No | No | No |
| PWM Mode | Current | Current | |
| Topology | Boost | Boost | Boost, Sepic, FlyBack |
| Step-Up | Yes | Yes | Yes |
| Inverting | No | No | |
| Flyback | No | No | Yes |
| RegType | Switching Regulator | Switching Regulator | Switching Regulator |
| Adjustable Output | Yes | Yes | |
| Temperature Min | -40 deg C | -40 deg C | |
| Temperature Max | 125 deg C | 125 deg C | |
| Automotive | Yes | Yes | Yes |
| PowerWise | No | No |
LM2731 芯片订购型号Order
| Part Number(s) (NSID) | Top View | Availability | Budgetary Pricing | Pack Size |
|---|---|---|---|---|
| LM2731XMF/NOPB LM2731XMF |
 SOT-23 |
Full production Lead Time: 6 weeks | $1.08 each at 1K+ pcs | reel of 1000  |
| LM2731XMFX/NOPB LM2731XMFX |
SOT-23 |
Full production Lead Time: 6 weeks | $1.08 each at 1K+ pcs | reel of 3000 |
| LM2731YMF/NOPB LM2731YMF |
SOT-23 |
Full production Lead Time: 6 weeks | $1.08 each at 1K+ pcs | reel of 1000 |
| LM2731YMFX/NOPB LM2731YMFX |
SOT-23 |
Full production Lead Time: 6 weeks | $1.08 each at 1K+ pcs | reel of 3000 |
LM2731 开发工具
| Part Number(s) (NSID) |
Description | Availability | Budgetary Pricing | Pack Size | 产品图片 |
|---|---|---|---|---|---|
| LM2731XEVAL | 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23 | Full production | $30.00 each | 1 | LM2731XEVAL |
| LM2731YEVAL | 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23 | Full production | $30.00 each | 1 | LM2731YEVAL |
LM2731 封装Packaging
| Part Number(s) (NSID) |
Weight (milligrams) |
Type | Pins | MSL Rating | Peak Reflow | RoHS Status |
CAD Symbols | Models | Package Marking Format |
|---|---|---|---|---|---|---|---|---|---|
| LM2731XMF/NOPB LM2731XMF |
14.696 14.801 |
SOT-23 |
5 | 1 1 |
260 260 |
Detail | LM2731XMF/NOPB LM2731XMF |
N/A |
S51A XTT |
| LM2731XMFX/NOPB LM2731XMFX |
14.696 14.801 |
SOT-23 |
5 | 1 1 |
260 260 |
Detail | LM2731XMFX/NOPB LM2731XMFX |
N/A |
S51A XTT |
| LM2731YMF/NOPB LM2731YMF |
14.696 14.801 |
SOT-23 |
5 | 1 1 |
260 260 |
Detail | LM2731YMF/NOPB LM2731YMF |
N/A |
S51B XTT |
| LM2731YMFX/NOPB LM2731YMFX |
14.696 14.801 |
SOT-23 |
5 | 1 1 |
260 260 |
Detail | LM2731YMFX/NOPB LM2731YMFX |
N/A |
S51B XTT |
LM2731 标准体系参考Reliability Metrics
| Part Number | Process | EFR Reject | EFR Sample Size | PPM | LTA Rejects | LTA Device Hours | FITS | MTTF (Hours) |
|---|---|---|---|---|---|---|---|---|
| LM2731XMF | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060 |
| LM2731XMFX | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060 |
| LM2731YMF | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060 |
| LM2731YMFX | ABCD150 | 0 | 34175 | 0 | 0 | 4234000 | 1 | 1201409060 |