ZHCSG47C February   2017  – December 2022

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  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 Switching Characteristics
    7. 6.7 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 Device Enable (EN)
      2. 7.3.2 Adjustable Power-Good Threshold (PG, PGADJ)
      3. 7.3.3 Adjustable Power-Good Delay Timer (DELAY)
      4. 7.3.4 Undervoltage Shutdown
      5. 7.3.5 Current Limit
      6. 7.3.6 Thermal Shutdown
      7. 7.3.7 Integrated Watchdog
        1. 7.3.7.1 Window Watchdog (WTS, ROSC, FSEL and WRS)
        2. 7.3.7.2 Standard Watchdog (WTS, ROSC and FSEL)
        3. 7.3.7.3 Watchdog Service Signal and Watchdog Fault Outputs (WD and WDO)
        4. 7.3.7.4 ROSC Status Detection (ROSC)
        5. 7.3.7.5 Watchdog Enable (PG and WD_EN)
        6. 7.3.7.6 Watchdog Initialization
        7. 7.3.7.7 Window Watchdog Operation (WTS = Low)
        8. 7.3.7.8 Standard Watchdog Operation (WTS = High)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation With Input Voltage Lower Than 4 V
      2. 7.4.2 Operation With Input Voltage Higher Than 4 V
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Input Capacitor
        2. 8.2.2.2 Output Capacitor
        3. 8.2.2.3 Power-Good Threshold
        4. 8.2.2.4 Power-Good Delay Period
        5. 8.2.2.5 Watchdog Setup
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 接收文档更新通知
    3. 9.3 支持资源
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 术语表
  10. 10Mechanical, Packaging, and Orderable Information

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

NC - No internal connection
Figure 5-1 PWP PowerPAD™ Package,16-Pin HTSSOP With Exposed Thermal Pad(Top View)
Table 5-1 Pin Functions
PIN TYPE DESCRIPTION
NAME NO.
DELAY 8 O Power-good delay period adjustment pin. Connect this pin with a capacitor to ground to adjust the power-good delay time.
EN 2 I Device enable pin. Pull this pin down to low-level voltage to disable the device. Pull this pin up to high-level voltage to enable the device.
FSEL 3 I Internal oscillator frequency selection pin. Pull this pin down to low-level voltage to select the high-frequency oscillator. Pull this pin up to high-level voltage to select the low-frequency oscillator.
GND 5, 13 — Ground reference
IN 1 I Device input power-supply pin
NC 6 — Not connected
OUT 16 O Device 3.3-V or 5-V regulated output voltage pin
PG 14 O Power-good pin. Open-drain output pin. Pull this pin up to VOUT or to a reference through a resistor. When the output voltage is not ready, this pin is pulled down to ground.
PGADJ 15 I Power-good threshold adjustment pin. Connect a resistor divider between the PGADJ and OUT pins to set the power-good threshold. Connect this pin to ground to set the threshold to 91.6% of output voltage VOUT.
ROSC 7 O Watchdog timer adjustment pin. Connect a resistor between the ROSC pin and the GND pin to set the duration of the watchdog monitor. Leaving this pin open or connecting this pin to ground results in the watchdog reporting a fault at the watchdog output (WDO).
WD 9 I Watchdog service-signal input pin.
WDO 10 O Watchdog status pin. Open-drain output pin. Pull this pin up to OUT or a reference voltage through a resistor. When watchdog fault occurs, this pin is pulled down to a low-level voltage.
WD_EN 11 I Watchdog enable pin. Pull this pin down to a low level to enable the watchdog. Pull this pin up to a high level to disable the watchdog.
WRS 12 I Window ratio selection pin (only applicable for the window watchdog). Pull this pin down to a low level to set the open:closed window ratio to 1:1. Pull this pin up to high level to set the open:closed window ratio to 8:1.
WTS 4 I Watchdog type-selection pin. To set the window watchdog, connect this pin to the GND pin. To set the standard watchdog, pull this pin high.
Thermal pad — — Solder to board to improve the thermal performance.