Texas Instruments TPS769 Series Скачать руководство пользователя страница 1

Страница: 1 / 25

TPS769xx

SOT-23 LDO Linear Regulator

Evaluation Module

February 2000

Mixed-Signal Products

User’s Guide

SLVU024

Содержание TPS769 Series

Страница 1: ...TPS769xx SOT 23 LDO Linear Regulator Evaluation Module February 2000 Mixed Signal Products User s Guide SLVU024...

Страница 2: ...ONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH PERSONAL INJURY OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE CRITICAL APPLICATIONS TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED AUTHORIZED OR WARRANT...

Страница 3: ...tory test environment only It generates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC...

Страница 4: ...iv...

Страница 5: ...Figures 1 1 Schematic Diagram TPS76901EVM 127 VO 1 V 1 2 1 2 Fixed Voltage Version of the TPS769xxEVM 127 1 5 2 1 Top Layer 2 2 2 2 Top Silk Screen 2 2 2 3 Bottom Layer Top View 2 3 2 4 Bottom Silk S...

Страница 6: ...vi...

Страница 7: ...oltage options These EVMs are pin compatible with standard 3 terminal type regulators The EVMs are set up as 1 V 1 8 V and 3 3 V output at 100 mA Various options can be imple mented with the board to...

Страница 8: ...which reduces the device quiescient current to 28 A max Other features of the PMOS LDO is the low dropout voltage of 71 mV typ thermal protection over current limit and 2 A shutdown quiescient curren...

Страница 9: ...C2 component pads can be used for an RC circuit When using the TPS76918EVM 127 or the TPS76933EVM 127 the external divider is not required and R3 is a 0 resistor used to connect the sense terminal to...

Страница 10: ...R3 R3 R6 VREF R3 R3 R6 2 495 V The contribution of the output voltage is VB R6 R3 R6 VO The total feedback voltage at VFB then is the sum of the two previous equa tions VFB VA VB R3 R3 R6 2 495 R6 R3...

Страница 11: ...le Both of these EVMs use only 4 components see Figure 1 2 and can be used as a three terminal regulator Figure 1 2 Fixed Voltage Version of the TPS769xxEVM 127 J2 GND R2 C2 0 C1 1 0 F R1 Open J1 IN 3...

Страница 12: ...1 6 Introduction...

Страница 13: ...Layers and Assembly Drawings Board Layers and Assembly Drawings This chapter shows the board layers and assembly drawings of the TPS769xx EVM Topic Page 2 1 Board Layers 2 2 2 2 Assembly Drawings 2 5...

Страница 14: ...Board Layers 2 2 Board Layers and Assembly Drawings 2 1 Board Layers Figure 2 1 Top Layer Figure 2 2 Top Silk Screen...

Страница 15: ...Board Layers 2 3 Board Layers and Assembly Drawings Figure 2 3 Bottom Layer Top View Figure 2 4 Bottom Silk Screen Top View...

Страница 16: ...Board Layers 2 4 Board Layers and Assembly Drawings Figure 2 5 Drill Drawing and Drill Table...

Страница 17: ...Assembly Drawings 2 5 Board Layers and Assembly Drawings 2 2 Assembly Drawings Figure 2 6 Top Assembly Figure 2 7 Bottom Assembly Bottom View...

Страница 18: ...2 6 Board Layers and Assembly Drawings...

Страница 19: ...3 1 Testing Testing This chapter provides details on testing the TPS76901 EVM 127 Topic Page 3 1 Testing 3 2 Chapter 3...

Страница 20: ...st Setup Test Procedure for TPS76901EVM 127 VO 1 V 1 Connect test setup as shown in the previous illustration Set load to zero current Set input voltage to 5 V and apply 2 Verify output voltage is 1 0...

Страница 21: ...terplex 0 1 J2 CA26DA D36K 0FA Clip surface mount 0 040 board 0 090 stand off NAS Interplex 0 1 J3 CA26DA D36K 0FA Clip Surface mount 0 040 board 0 090 stand off NAS Interplex 0 1 R1 Not used 603 R2 1...

Страница 22: ...1 8 2 0 20 40 60 80 100 QUIESCIENT CURRENT vs OUTPUT CURRENT VADJ 1 V VIN 5 V IO Output Current mA Quiscent Current mA I Q Figure 3 3 Line Regulation 1 02 1 025 1 03 1 035 1 04 1 045 1 05 2 3 4 5 6 7...

Страница 23: ...show the results of this modification Figure 3 4 Quiescent Current vs Output Current 0 2 4 6 8 10 12 14 16 0 20 40 60 80 100 QUIESCIENT CURRENT vs OUTPUT CURRENT VIN 5 V R5 180 IO Output Current mA Qu...

Страница 24: ...3 6 Testing...

Страница 25: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments TPS76918EVM 127 TPS76901EVM 127 TPS76933EVM 127...