ZHCSG27 February   2017 TPS3852-Q1

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  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 Timing Requirements
    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 RESET
      2. 7.3.2 Manual Reset (MR)
      3. 7.3.3 Undervoltage Fault Detection
      4. 7.3.4 Watchdog Mode
        1. 7.3.4.1 SET1
        2. 7.3.4.2 Window Watchdog Timer
        3. 7.3.4.3 Watchdog Input (WDI)
        4. 7.3.4.4 CWD
        5. 7.3.4.5 Watchdog Output (WDO)
    4. 7.4 Device Functional Modes
      1. 7.4.1 VDD is Below VPOR (VDD < VPOR)
      2. 7.4.2 Above Power-On-Reset, But Less Than VDD(min) (VPOR ≤ VDD < VDD(min))
      3. 7.4.3 Normal Operation (VDD ≥ VDD(min))
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 CWD Functionality
        1. 8.1.1.1 Factory-Programmed Timing Options
        2. 8.1.1.2 Adjustable Capacitor Timing
      2. 8.1.2 Overdrive Voltage
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Monitoring the 3.3-V Rail
        2. 8.2.2.2 Calculating RESET and the WDO Pullup Resistor
        3. 8.2.2.3 Setting the Window Watchdog
        4. 8.2.2.4 Watchdog Disabled During Initialization Period
      3. 8.2.3 Glitch Immunity
      4. 8.2.4 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 开发支持
        1. 11.1.1.1 评估模块
      2. 11.1.2 器件命名规则
    2. 11.2 接收文档更新通知
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 Glossary
  12. 12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

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
Supply voltage range VDD –0.3 7 V
Output voltage range RESET, WDO –0.3 7 V
Voltage ranges SET1, WDI, MR –0.3 7 V
CWD, CRST –0.3 VDD + 0.3(3)
Output pin current ±20 mA
Input current (all pins) ±20 mA
Continuous total power dissipation See Thermal Information
Temperature Operating junction, TJ(2) –40 150 °C
Operating free-air, TA(2) –40 150
Storage, Tstg –65 150
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Assume that TJ = TA as a result of the low dissipated power in this device.
(3) The absolute maximum rating is VDD + 0.3 V or 7.0 V, whichever is smaller.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per AEC Q100-002(1) ±2000 V
Charged-device model (CDM), per AEC Q100-011 ±750
(1) AEC Q100-002 indicates that HBM stressing shall be in accordance with the ANSI/ESDA/JEDEC JS-001 specification.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)
MIN NOM MAX UNIT
VDD Supply pin voltage 1.6 6.5 V
VSET1 SET1 pin voltage 0 6.5 V
VMR MR pin voltage 0 6.5 V
CCWD Watchdog timing capacitor 0.1(1) 1000(1) nF
CWD Pullup resistor to VDD 9 10 11 kΩ
RPU Pullup resistor, RESET and WDO 1 10 100 kΩ
IRESET RESET pin current 10 mA
IWDO Watchdog output current 10 mA
TJ Junction temperature –40 125 °C
(1) Using a CCWD capacitor of 0.1 nF or 1000 nF gives a tWDU(typ) of 62.74 ms or 77.45 seconds, respectively.

6.4 Thermal Information

THERMAL METRIC(1) TPS3852-Q1 UNIT
DRB (VSON)
8 PINS
RθJA Junction-to-ambient thermal resistance 47.7 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 51.5 °C/W
RθJB Junction-to-board thermal resistance 22.2 °C/W
ψJT Junction-to-top characterization parameter 1.3 °C/W
ψJB Junction-to-board characterization parameter 22.3 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance 4.3 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

6.5 Electrical Characteristics

at VITN + VHYST ≤ VDD ≤ 6.5 V over the operating temperature range of –40°C ≤ TA, T J ≤ +125°C (unless otherwise noted); the open-drain pullup resistors are 10 kΩ for each output; typical values are at TJ = 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
GENERAL CHARACTERISTICS
VDD(3) Supply voltage 1.6 6.5 V
IDD Supply current 10 19 µA
RESET FUNCTION
VPOR(2) Power-on-reset voltage IRESET = 15 µA, VOL(MAX) = 0.25 V  0.8 V
VUVLO(1) Undervoltage lockout voltage 1.35 V
VITN Undervoltage threshold accuracy,
entering RESET		 VDD falling VITN – 0.8% VITN + 0.8%
VHYST Hysteresis voltage VDD rising 0.2% 0.5% 0.8%
IMR MR pin internal pullup current VMR = 0 V 500 620 700 nA
WINDOW WATCHDOG FUNCTION
ICWD CWD pin charge current CWD = 0.5 V  337  375 413 nA
VCWD CWD pin threshold voltage 1.192 1.21 1.228 V
VOL RESET, WDO output low VDD = 5 V,
IRESET = IWDO = 3 mA		 0.4 V
ID RESET, WDO output leakage current,
open-drain		 VDD = VITN + VHYST,
VRESET = VWDO = 6.5 V		 1 µA
VIL Low-level input voltage (MR, SET1) 0.25 V
VIH High-level input voltage (MR, SET1) 0.8 V
VIL(WDI) Low-level input voltage (WDI) 0.3 × VDD V
VIH(WDI) High-level input voltage (WDI) 0.8 × VDD V
(1) When VDD falls below UVLO, RESET is driven low.
(2) When VDD falls below VPOR, RESET and WDO are undefined.
(3) During power on, VDD must be a minimum of 1.6 V for at least 300 µs before RESET correlates with VDD.

6.6 Timing Requirements

at VITN + VHYST ≤ VDD ≤ 6.5 V over the operating temperature range of –40°C ≤ TA, T J ≤ +125°C (unless otherwise noted); the open-drain pullup resistors are 10 kΩ for each output; typical values are at TJ = 25°C
MIN TYP MAX UNIT
GENERAL
tINIT CWD pin evaluation period 381 µs
Minimum MR, SET1 pin pulse duration 1 µs
Startup delay 300 µs
RESET FUNCTION
tRST Reset timeout period 170 200 230 ms
tRST-DEL VDD to RESET delay VDD = VITN + VHYST + 2.5% 35 µs
VDD = VITN – 2.5% 17
tMR-DEL MR to RESET delay 200 ns
Watchdog Function
tWDL Window watchdog lower boundary CWD = NC, SET1 = 0(1) Watchdog disabled
CWD = NC, SET1 = 1(1) 680 800 920 ms
CWD = 10 kΩ to VDD,
SET1 = 0(1)		 Watchdog disabled
CWD = 10 kΩ to VDD,
SET1 = 1(1)		 1.48 1.85 2.22 ms
tWDU Window watchdog upper boundary CWD = NC, SET1 = 0(1) Watchdog disabled
CWD = NC, SET1 = 1(1) 1360 1600 1840 ms
CWD = 10 kΩ to VDD,
SET1 = 0(1)		 Watchdog disabled
CWD = 10 kΩ to VDD,
SET1 = 1(1)		 9.35 11.0 12.65 ms
tWD-setup Setup time required for device to respond to changes on WDI after being enabled 150 µs
Minimum WDI pulse duration 50 ns
tWD-DEL WDI to WDO delay 50 ns
(1) SET1 = 0 means VSET1 < VIL, SET1 = 1 means VSET1 > VIH.
TPS3852-Q1 WD_Timing.gif
1. See Figure 2 for WDI timing requirements.
Figure 1. Timing Diagram
TPS3852-Q1 Min_Max_Timing.gif Figure 2. TPS3852-Q1 Window Watchdog Timing

6.7 Typical Characteristics

all curves are taken at 25°C with 1.6 V ≤ VDD ≤ 6.5 V (unless otherwise noted)
TPS3852-Q1 SupplyCurrentVsVDD.gif
Figure 3. Supply Current vs VDD
TPS3852-Q1 tc_CWD_Current_Vs_temp_SBVS301-01.gif
Figure 5. CWD Charging Current vs Temperature
TPS3852-Q1 tc_vitn_acc_vs_temp_3_3.gif
TPS3852G33-Q1
Figure 7. VITN Accuracy vs Temperature
TPS3852-Q1 tc_vitn_acc_histogram.gif
Includes G and H versions with 3.3-V nominal monitored voltage,
total units = 15,536
Figure 9. VITN Accuracy Histogram
TPS3852-Q1 Vol_vs_Irst_1_6V_SBVS301-08.gif
VDD = 1.6 V
Figure 11. Low-Level RESET Voltage vs RESET Current
TPS3852-Q1 tc_propdelay_vs_overdrive_3.3V_enter_uv.gif
TPS3852G33-Q1 entering undervoltage
Figure 13. Propagation Delay vs Overdrive
TPS3852-Q1 tc_glitchimmunity_3_3V.gif
VITN = 3.168 V
Figure 15. High-to-Low Glitch Immunity vs Temperature
TPS3852-Q1 MR_threshold_vs_temp.gif
VDD = 1.6 V
Figure 4. MR Threshold vs Temperature
TPS3852-Q1 tc_vitn_vhyst_acc_vs_temp_3_3.gif
TPS3852G33-Q1
Figure 6. VITN + VHYST Accuracy vs Temperature
TPS3852-Q1 tc_vitn_vhyst_histogram.gif
Includes G and H versions with 3.3-V nominal monitored voltage,
total units = 15,536
Figure 8. VITN + VHYST Accuracy Histogram
TPS3852-Q1 hysteresis_histogram.gif
Includes G and H versions with 3.3-V nominal monitored voltage,
total units = 15,536
Figure 10. Hysteresis Histogram
TPS3852-Q1 Vol_vs_Irst_6_5V_SBVS301-02.gif
VDD = 6.5 V
Figure 12. Low-Level RESET Voltage vs RESET Current
TPS3852-Q1 tc_propdelay_vs_overdrive_5V_exit_uv.gif
TPS3852G33-Q1 exiting undervoltage
Figure 14. Propagation Delay (tRST) vs Overdrive
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