ZHCSI15L June 2006 – May 2018 TPS65023 , TPS65023B
PRODUCTION DATA.
- 1 特性
- 2 應(yīng)用
- 3 說(shuō)明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 Recommended Operating Conditions
- 6.4 Thermal Information
- 6.5 Electrical Characteristics
- 6.6 Electrical Characteristics: Supply Pins VCC, VINDCDC1, VINDCDC2, VINDCDC3
- 6.7 Electrical Characteristics: Supply Pins VBACKUP, VSYSIN, VRTC, VINLDO
- 6.8 Electrical Characteristics: VDCDC1 Step-Down Converter
- 6.9 Electrical Characteristics: VDCDC2 Step-Down Converter
- 6.10 Electrical Characteristics: VDCDC3 Step-Down Converter
- 6.11 I2C Timing Requirements for TPS65023B
- 6.12 Typical Characteristics
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 VRTC Output and Operation With or Without Backup Battery
- 7.3.2 Step-Down Converters, VDCDC1, VDCDC2, and VDCDC3
- 7.3.3 Power Save Mode Operation
- 7.3.4 Low Ripple Mode
- 7.3.5 Soft-Start
- 7.3.6 100% Duty Cycle Low Dropout Operation
- 7.3.7 Active Discharge When Disabled
- 7.3.8 Power-Good Monitoring
- 7.3.9 Low-Dropout Voltage Regulators
- 7.3.10 Undervoltage Lockout
- 7.3.11 Power-Up Sequencing
- 7.4 Device Functional Modes
- 7.5 Programming
- 7.6
Register Maps
- 7.6.1 VERSION Register Address: 00h (Read Only)
- 7.6.2 PGOODZ Register Address: 01h (Read Only)
- 7.6.3 MASK Register Address: 02h (Read and Write), Default Value: C0h
- 7.6.4 REG_CTRL Register Address: 03h (Read and Write), Default Value: FFh
- 7.6.5 CON_CTRL Register Address: 04h (Read and Write), Default Value: B1h
- 7.6.6 CON_CTRL2 Register Address: 05h (Read and Write), Default Value: 40h
- 7.6.7 DEFCORE Register Address: 06h (Read and Write), Default Value: 14h/1Eh
- 7.6.8 DEFSLEW Register Address: 07h (Read and Write), Default Value: 06h
- 7.6.9 LDO_CTRL Register Address: 08h (Read and Write), Default Value: Set with DEFLDO1 and DEFLDO2
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機(jī)械、封裝和可訂購(gòu)信息
封裝選項(xiàng)
請(qǐng)參考 PDF 數(shù)據(jù)表獲取器件具體的封裝圖。
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RSB|40
散熱焊盤(pán)機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RSB|40
訂購(gòu)信息
8.2.2.1 Inductor Selection for the DC-DC Converters
Each of the converters in the TPS65023x typically use a 2.2-μH output inductor. Larger or smaller inductor values are used to optimize the performance of the device for specific operation conditions. The selected inductor has to be rated for its DC resistance and saturation current. The DC resistance of the inductance influences directly the efficiency of the converter. Therefore, an inductor with lowest DC resistance must be selected for highest efficiency.
For a fast transient response, a 2.2-μH inductor in combination with a 22-μF output capacitor is recommended.
Equation 8 calculates the maximum inductor current under static load conditions. The saturation current of the inductor must be rated higher than the maximum inductor current as calculated with Equation 8. This is needed because during heavy load transient the inductor current rises above the calculated value.
where
- f = Switching Frequency (2.25 MHz typical)
- L = Inductor Value
- ΔIL = Peak-to-Peak inductor ripple current
- ILMAX = Maximum Inductor current
The highest inductor current occurs at maximum Vin.
Open-core inductors have a soft saturation characteristic, and they can usually handle higher inductor currents versus a comparable shielded inductor.
A conservative approach is to select the inductor current rating just for the maximum switch current of the TPS65023x (2 A for the VDCDC1 and VDCDC2 converters, and 1.5 A for the VDCDC3 converter). The core material from inductor to inductor differs and has an impact on the efficiency especially at high switching frequencies.
See Table 18 and the typical applications for possible inductors.
Table 18. Tested Inductors
| DEVICE | INDUCTOR VALUE | TYPE | COMPONENT SUPPLIER |
|---|---|---|---|
| All converters | 2.2 μH | LPS4012-222LMB | Coilcraft |
| 2.2 μH | VLCF4020T-2R2N1R7 | TDK | |
| For DCDC2 or DCDC3 | 2.2 uH | LQH32PN2R2NN0 | Murata |
| For DCDC1 | 1.5 uH | LQH32PN1R5NN0 | Murata |
| All converters | 2.2 uH | PST25201B-2R2MS | Cyntec |