ZHCS522H January   2006  – October 2017 LM3100

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1. 3.1 典型应用
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Hysteretic Control Circuit Overview
    4. 7.4 Device Functional Modes
      1. 7.4.1 Start-up Regulator (VCC)
      2. 7.4.2 Regulation Comparator
      3. 7.4.3 Over-Voltage Comparator
      4. 7.4.4 ON-Time Timer, Shutdown
      5. 7.4.5 Current Limit
      6. 7.4.6 N-Channel Buck Switch and Driver
      7. 7.4.7 Soft-Start
      8. 7.4.8 Thermal Protection
  8. 8 Applications and Implementation
    1. 8.1 Applications Information
      1. 8.1.1 External Components
        1. 8.1.1.1 RFB1 and RFB2
        2. 8.1.1.2 RON
        3. 8.1.1.3 L
        4. 8.1.1.4 CVCC
        5. 8.1.1.5 CO and CO3
        6. 8.1.1.6 CIN and CIN3
        7. 8.1.1.7 CBST
        8. 8.1.1.8 CSS
        9. 8.1.1.9 CFB
    2. 8.2 Typical Application
  9. 9 Layout
    1. 9.1 Layout Guidelines
      1. 9.1.1 PC Board Layout
  10. 10器件和文档支持
    1. 10.1 接收文档更新通知
    2. 10.2 社区资源
    3. 10.3 商标
    4. 10.4 静电放电警告
    5. 10.5 Glossary
  11. 11机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

5 Pin Configuration and Functions

PWP Package
20-Pin HTSSOP
Top View
LM3100 20174703.gif

Pin Functions

PIN DESCRIPTION
NO. NAME
1,9,10,12,19,20 N/C No Connection
These pins must be left unconnected.
2, 3 SW Switching Node
Internally connected to the buck switch source. Connect to output inductor.
4, 5 VIN Input supply voltage
Supply pin to the device. Nominal input range is 4.5 V to 36 V.
6 BST Connection for bootstrap capacitor
Connect a 0.033 µF capacitor from SW pin to this pin. An internal diode charges the capacitor during the high-side switch off-time.
7 GND Analog Ground
Ground for all internal circuitry other than the synchronous switches.
8 SS Soft-start
An internal 8 µA current source charges an external capacitor to provide the soft- start function.
11 TST Test mode enable pin
Force the device into test mode. Must be connected to ground for normal operation.
13 FB Feedback
Internally connected to the regulation and over-voltage comparators. The regulation setting is 0.8 V at this pin. Connect to feedback divider.
14 EN Enable pin
Connect a voltage higher than 1.26 V to enable the regulator.
15 RON On-time Control
An external resistor from VIN to this pin sets the high-side switch on-time.
16 VCC Start-up regulator Output
Nominally regulated to 6 V. Connect a capacitor of not less than 680 nF between VCC and GND for stable operation.
17, 18 PGND Power Ground
Synchronous rectifier MOSFET source connection. Tie to power ground plane.
DAP EP Exposed Pad
Thermal connection pad, connect to GND.