LM5007 Hysteretic PFET Buck Controller
| LM5008 | 100V 350mA Switching Regulator |
| LM5010 | 1A 80V Switching Regulator |
| LM2597HV | 0.5A 60V Simple Switcher W/ Pgood |
| LM2936 | LM2936 - 60V 50mA Linear Regulator |
| LM317HV | 60V 1.5A Linear Regulator |
| LM5007EP | Higher Temperature Enhanced Plastic Version |
LM5007 特性Features
- Integrated 80V, 0.7A N-Channel Buck Switch
- Internal HV Vcc Regulator
- No Control Loop Compensation Required
- Ultra-Fast Transient Response
- On Time Varies Inversely with Line Voltage
- Operating Frequency Nearly Constant with Varying Line Voltage
- Adjustable Output Voltage
- Highly Efficient Operation
- Precision Reference
- Low Bias Current
- Intelligent Current Limit Protection
- Thermal Shutdown
- External Shutdown Control
LM5007 概述Description
The LM5007 Step Down Switching Regulator features all of the functions needed to implement low cost, efficient, Buck bias regulators. This high voltage regulator contains an 80 V, 0.7A N-Channel Buck Switch. The device is easy to apply and is provided in the MSOP-8 and the thermally enhanced LLP-8 packages. The regulator is based on a hysteretic control scheme using an on time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant with load and input voltage variations. The hysteretic control requires no control loop compensation, while providing very fast load transient response. An intelligent current limit is implemented in the LM5007 with forced off time that is inversely proportional to VOUT. This current limiting scheme reduces load current foldback. Additional protection features include: Thermal Shutdown, Vcc undervoltage lockout, gate drive undervoltage lockout, and Max Duty Cycle limiter.
LM5007 应用Applications
- Set-Top Box
- DSL/Cable Modem
- PC/IA
- Auto PC
- TFT Monitor
- Battery Powered Portable Applications
- Distributed Power Systems
- Always On Power
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LM5007 功能框图Block Diagram |
LM5007 典型性能Typical Performance |
|---|
LM5007 性能参数Parametrics
| Paramaters / Values | LM5007 | LM5008 | LM5010 | LM2597HV |
|---|---|---|---|---|
| Output Current | 500 mA | 350 mA | 1000 mA | 500 mA |
| Input Min Voltage | 9 Volt | 9.5 Volt | 8 Volt | 4.5, 7, 4.75, 15 Volt |
| Input Max Voltage | 75 Volt | 95 Volt | 75 Volt | 60 Volt |
| Output Min | 2.5 Volt | 2.5 Volt | 2.5 Volt | 3.3, 1.23, 12, 5 Volt |
| Output Max | 73 Volt | 75 Volt | 70 Volt | 57, 3.3, 12, 5 Volt |
| Frequency Min | 50 kHz | 50 kHz | 50 kHz | 150 kHz |
| Frequency Max | 800 kHz | 600 kHz | 1000 kHz | 150 kHz |
| Efficiency (peak) | 93 % | 92 % | 91 % | 88, 80, 82 % |
| On/Off Pin | Yes | Yes | Yes | Yes |
| PowerGood / Error Flag | No | No | No | Yes |
| SoftStart | No | No | Yes | Yes |
| Sync Pin | No | No | No | No |
| Inverting | Yes | Yes | Yes | Yes |
| Flyback | No | No | No | No |
| RegType | Switching Regulator | Switching Regulator | Switching Regulator | Switching Regulator |
| Temperature Min | -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 |
| Adjustable Output | Yes | Yes | Yes | Yes, No |
| Adj Switch Frequency | Yes | Yes | Yes | No |
| PWM Mode | Constant on-time | Constant on-time | Constant on-time | Voltage |
| Topology | Buck | Buck | Buck | Buck |
| Special Features | Internal startup regulator for Vin>9V, internal 80V/0.7A N-FET, Pull Ron pin to ground for shutdown | Internal startup regulator for Vin>9V, internal 100V/0.5A N-FET, Pull Ron pin to ground for shutdown | No compensation required, ultra-fast transient response | SIMPLE SWITCHER regulator, error output delay |
| Step-Down | Yes | Yes | Yes | Yes |
| Multiple Output Capability | No | No | No | No |
| Output Power | Undefined Watt | Undefined Watt | Undefined Watt | Undefined Watt |
| Output Voltage | Undefined Volt | Undefined Volt | Undefined Volt | 3.3, Undefined, 5, 15 Volt |
| Output Range | 2.5V to 73V | 2.5V to 75V | 2.5V to 70V | 15V, 5V, 3.3V, 1.23V to 57V |
| Switching Frequency | 800 kHz | 600 kHz | 1000 kHz | 150 kHz |
| Feedback Voltage | 2.5 Volt | 2.5 Volt | 2.5 Volt | |
| Regulator Family | Undefined | Undefined | Undefined | SIMPLE SWITCHER |
| Automotive | Yes | Undefined | ||
| Synchronous Rectification | No | No | No | No |
LM5007 芯片订购型号Order
| Part Number(s) (NSID) | Top View | Availability | Budgetary Pricing | Pack Size |
|---|---|---|---|---|
| LM5007MM/NOPB
LM5007MM |
MINI SOIC |
Full production Lead Time: 6 weeks | $1.59 each at 1K+ pcs | reel
of
1000
 |
| LM5007MMX/NOPB
LM5007MMX |
MINI SOIC |
Full production Lead Time: 6 weeks | $1.59 each at 1K+ pcs | reel
of
3500
|
| LM5007SD/NOPB
LM5007SD |
LLP |
Full production Lead Time: 6 weeks | $1.59 each at 1K+ pcs | reel
of
1000
|
| LM5007SDX/NOPB |
LLP |
Full production Lead Time: 6 weeks | $1.59 each at 1K+ pcs | reel
of
4500
|
LM5007 开发工具LM5007EVAL
| Part Number(s) (NSID) | Description | Availability | Budgetary Pricing | Pack Size |
|---|---|---|---|---|
| LM5007EVAL | High Voltage (80V) Step Down Switching Regulator Evaluation Board | Full production | $30.00 each | 1 |
LM5007 停产Obsolete Versions
| Obsolete Part | Alternate Part or Supplier | Source | Last Time Buy Date |
|---|---|---|---|
| LM5007MMEP | NONE | NATIONAL SEMICONDUCTOR | 16 Nov 2008 |
LM5007 应用技术支持与电子电路设计开发资源下载 Documents
- LM5007 数据手册DataSheet下载. pdf
- LM5007 开发工具LM5007EVAL
- LM5007 封装形式尺寸图
- AN-1298: Application Note 1298 LM5007 Evaluation Board
- AN-1319: Application Note 1319 Analysis and Design of a Hysteretic Constant Frequency Buck Regulator Using the LM5007
- AN-1634: Application Note 1634 Starting Up A Buck Regulator With a Voltage Present At V OUT
- LM5007 绿色环保信息