Datasheet TPS62933 (Texas Instruments) - 7
| 制造商 | Texas Instruments |
| 描述 | 3.8-V to 30-V, 3-A, 200-kHz to 2.2-MHz, low-IQ synchronous buck converter in SOT-583 package |
| 页数 / 页 | 51 / 7 — TPS62933, TPS62932. , TPS62933F,. TPS62933P. , TPS62933O. www.ti.com. 8.5 … |
| 文件格式/大小 | PDF / 4.0 Mb |
| 文件语言 | 英语 |
TPS62933, TPS62932. , TPS62933F,. TPS62933P. , TPS62933O. www.ti.com. 8.5 Electrical Characteristics (continued). PARAMETER
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TPS62933, TPS62932 , TPS62933F, TPS62933P , TPS62933O www.ti.com
SLUSEA4D – JUNE 2021 – REVISED AUGUST 2022
8.5 Electrical Characteristics (continued)
The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of the product containing it. TJ = –40°C to +150°C, VIN = 3.8 V to 30 V, unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
TPS62933 and TPS62933x 2.9 3.8 4.5 ILS_LIMIT Low-side MOSFET current limit A TPS62932 2 2.5 3 ILS_NOC Reverse current limit TPS62933F 1.2 2.4 3.6 A TPS62933, TPS62933P, and TPS62933O 0.75 IPEAK_MIN Minimum peak inductor current A TPS62932 0.53
SOFT START (SS PIN)
ISS Soft-start charge current TPS62932, TPS62933, and TPS62933F 4.5 5.5 6.5 μA TSS Fixed internal soft-start time TPS62933P and TPS62933O 2 ms
POWER GOOD (PG PIN)
VFB falling, PG high to low 85% VFB rising, PG low to high 90% VPGTH PG threshold, VFB percentage VFB falling, PG low to high 110% VFB rising, PG high to low 115% TPG_R PG delay time PG from low to high 70 μs TPG_F PG delay time PG from high to low 18 μs Measured when PG < 0.5 V with 100-kΩ VIN_PG_VALID Minimum VIN for valid PG output 2 2.5 V pullup to external 5 V VPG_OL PG output low-level voltage IPG = 0.5 mA 0.3 V PG leakage current when open IPG_LK V drain is high PG = 5.5 V –1 1 μA
OSCILLATOR FREQUENCY (RT PIN)
RT = floating 450 500 550 RT = GND 1000 1200 1350 fSW Switching center frequency kHz RT = 71.5 kΩ 310 RT = 9.09 kΩ 2100 fSW_min Minimum switching frequency TPS62933O 30 kHz tON_MIN (1) Minimum ON pulse width 70 ns tOFF_MIN (1) Minimum OFF pulse width 140 ns tON_MAX (1) Maximum ON pulse width 7 μs
OUTPUT OVERVOLTAGE AND UNDERVOLTAGE PROTECTION
OVP detect (L→H) 112% 115% 118% VOVP Output OVP threshold Hysteresis 5% VUVP Output UVP threshold UVP detect (H→L) 65% UV hiccup ON time before entering thiccup_ON 256 μs hiccup mode after soft start ends 10.5 × thiccup_OFF UV hiccup OFF time before restart s tSS
THERMAL SHUTDOWN
TSHDN (1) Thermal shutdown threshold Shutdown temperature 165 °C THYS (1) Hysteresis 30 °C
SPREAD SPECTRUM FREQUENCY
f f SW / m Modulation frequency kHz 128 Copyright © 2022 Texas Instruments Incorporated Submit Document Feedback 7 Product Folder Links: TPS62933 TPS62932 TPS62933F TPS62933P TPS62933O Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Description (continued) 6 Device Comparison Table 7 Pin Configuration and Functions 8 Specifications 8.1 Absolute Maximum Ratings 8.2 ESD Ratings 8.3 Recommended Operating Conditions 8.4 Thermal Information 8.5 Electrical Characteristics 8.6 Typical Characteristics 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.3.1 Fixed Frequency Peak Current Mode 9.3.2 Pulse Frequency Modulation 9.3.3 Voltage Reference 9.3.4 Output Voltage Setting 9.3.5 Switching Frequency Selection 9.3.6 Enable and Adjusting Undervoltage Lockout 9.3.7 External Soft Start and Prebiased Soft Start 9.3.8 Power Good 9.3.9 Minimum On Time, Minimum Off Time, and Frequency Foldback 9.3.10 Frequency Spread Spectrum 9.3.11 Overvoltage Protection 9.3.12 Overcurrent and Undervoltage Protection 9.3.13 Thermal Shutdown 9.4 Device Functional Modes 9.4.1 Modes Overview 9.4.2 Heavy Load Operation 9.4.3 Light Load Operation 9.4.4 Out of Audio Operation 9.4.5 Forced Continuous Conduction Operation 9.4.6 Dropout Operation 9.4.7 Minimum On-Time Operation 9.4.8 Shutdown Mode 10 Application and Implementation 10.1 Application Information 10.2 Typical Application 10.2.1 Design Requirements 10.2.2 Detailed Design Procedure 10.2.2.1 Custom Design With WEBENCH® Tools 10.2.2.2 Output Voltage Resistors Selection 10.2.2.3 Choosing Switching Frequency 10.2.2.4 Soft-Start Capacitor Selection 10.2.2.5 Bootstrap Capacitor Selection 10.2.2.6 Undervoltage Lockout Setpoint 10.2.2.7 Output Inductor Selection 10.2.2.8 Output Capacitor Selection 10.2.2.9 Input Capacitor Selection 10.2.2.10 Feedforward Capacitor CFF Selection 10.2.2.11 Maximum Ambient Temperature 10.2.3 Application Curves 10.3 What to Do and What Not to Do 11 Power Supply Recommendations 12 Layout 12.1 Layout Guidelines 12.2 Layout Example 13 Device and Documentation Support 13.1 Device Support 13.1.1 Third-Party Products Disclaimer 13.1.2 Development Support 13.1.2.1 Custom Design With WEBENCH® Tools 13.2 Receiving Notification of Documentation Updates 13.3 Support Resources 13.4 Trademarks 13.5 Electrostatic Discharge Caution 13.6 Glossary 14 Mechanical, Packaging, and Orderable Information
TPS62933, TPS62932 , TPS62933F, TPS62933P , TPS62933O www.ti.com
SLUSEA4D – JUNE 2021 – REVISED AUGUST 2022
8.5 Electrical Characteristics (continued)
The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of the product containing it. TJ = –40°C to +150°C, VIN = 3.8 V to 30 V, unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
TPS62933 and TPS62933x 2.9 3.8 4.5 ILS_LIMIT Low-side MOSFET current limit A TPS62932 2 2.5 3 ILS_NOC Reverse current limit TPS62933F 1.2 2.4 3.6 A TPS62933, TPS62933P, and TPS62933O 0.75 IPEAK_MIN Minimum peak inductor current A TPS62932 0.53
SOFT START (SS PIN)
ISS Soft-start charge current TPS62932, TPS62933, and TPS62933F 4.5 5.5 6.5 μA TSS Fixed internal soft-start time TPS62933P and TPS62933O 2 ms
POWER GOOD (PG PIN)
VFB falling, PG high to low 85% VFB rising, PG low to high 90% VPGTH PG threshold, VFB percentage VFB falling, PG low to high 110% VFB rising, PG high to low 115% TPG_R PG delay time PG from low to high 70 μs TPG_F PG delay time PG from high to low 18 μs Measured when PG < 0.5 V with 100-kΩ VIN_PG_VALID Minimum VIN for valid PG output 2 2.5 V pullup to external 5 V VPG_OL PG output low-level voltage IPG = 0.5 mA 0.3 V PG leakage current when open IPG_LK V drain is high PG = 5.5 V –1 1 μA
OSCILLATOR FREQUENCY (RT PIN)
RT = floating 450 500 550 RT = GND 1000 1200 1350 fSW Switching center frequency kHz RT = 71.5 kΩ 310 RT = 9.09 kΩ 2100 fSW_min Minimum switching frequency TPS62933O 30 kHz tON_MIN (1) Minimum ON pulse width 70 ns tOFF_MIN (1) Minimum OFF pulse width 140 ns tON_MAX (1) Maximum ON pulse width 7 μs
OUTPUT OVERVOLTAGE AND UNDERVOLTAGE PROTECTION
OVP detect (L→H) 112% 115% 118% VOVP Output OVP threshold Hysteresis 5% VUVP Output UVP threshold UVP detect (H→L) 65% UV hiccup ON time before entering thiccup_ON 256 μs hiccup mode after soft start ends 10.5 × thiccup_OFF UV hiccup OFF time before restart s tSS
THERMAL SHUTDOWN
TSHDN (1) Thermal shutdown threshold Shutdown temperature 165 °C THYS (1) Hysteresis 30 °C
SPREAD SPECTRUM FREQUENCY
f f SW / m Modulation frequency kHz 128 Copyright © 2022 Texas Instruments Incorporated Submit Document Feedback 7 Product Folder Links: TPS62933 TPS62932 TPS62933F TPS62933P TPS62933O Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Revision History 5 Description (continued) 6 Device Comparison Table 7 Pin Configuration and Functions 8 Specifications 8.1 Absolute Maximum Ratings 8.2 ESD Ratings 8.3 Recommended Operating Conditions 8.4 Thermal Information 8.5 Electrical Characteristics 8.6 Typical Characteristics 9 Detailed Description 9.1 Overview 9.2 Functional Block Diagram 9.3 Feature Description 9.3.1 Fixed Frequency Peak Current Mode 9.3.2 Pulse Frequency Modulation 9.3.3 Voltage Reference 9.3.4 Output Voltage Setting 9.3.5 Switching Frequency Selection 9.3.6 Enable and Adjusting Undervoltage Lockout 9.3.7 External Soft Start and Prebiased Soft Start 9.3.8 Power Good 9.3.9 Minimum On Time, Minimum Off Time, and Frequency Foldback 9.3.10 Frequency Spread Spectrum 9.3.11 Overvoltage Protection 9.3.12 Overcurrent and Undervoltage Protection 9.3.13 Thermal Shutdown 9.4 Device Functional Modes 9.4.1 Modes Overview 9.4.2 Heavy Load Operation 9.4.3 Light Load Operation 9.4.4 Out of Audio Operation 9.4.5 Forced Continuous Conduction Operation 9.4.6 Dropout Operation 9.4.7 Minimum On-Time Operation 9.4.8 Shutdown Mode 10 Application and Implementation 10.1 Application Information 10.2 Typical Application 10.2.1 Design Requirements 10.2.2 Detailed Design Procedure 10.2.2.1 Custom Design With WEBENCH® Tools 10.2.2.2 Output Voltage Resistors Selection 10.2.2.3 Choosing Switching Frequency 10.2.2.4 Soft-Start Capacitor Selection 10.2.2.5 Bootstrap Capacitor Selection 10.2.2.6 Undervoltage Lockout Setpoint 10.2.2.7 Output Inductor Selection 10.2.2.8 Output Capacitor Selection 10.2.2.9 Input Capacitor Selection 10.2.2.10 Feedforward Capacitor CFF Selection 10.2.2.11 Maximum Ambient Temperature 10.2.3 Application Curves 10.3 What to Do and What Not to Do 11 Power Supply Recommendations 12 Layout 12.1 Layout Guidelines 12.2 Layout Example 13 Device and Documentation Support 13.1 Device Support 13.1.1 Third-Party Products Disclaimer 13.1.2 Development Support 13.1.2.1 Custom Design With WEBENCH® Tools 13.2 Receiving Notification of Documentation Updates 13.3 Support Resources 13.4 Trademarks 13.5 Electrostatic Discharge Caution 13.6 Glossary 14 Mechanical, Packaging, and Orderable Information