Blaupunkt GTx 102 High Power User Manual download pdf

Designer’s Notepage

SLVA082 - December 1999

Powering the TMS320VC5402 Using the TPS60100,

TPS76918, and the TPS3305-18

Shawn T. Workman Mixed Signal Products

ABSTRACT

This report analyzes a low-cost, low-power supply design utilizing the TPS60100 dc-to-dc

converter, the TPS76918 series regulator, and the TPS3305–18 power-supply supervisor to

power DSP applications.

Contents

Design Problem 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Solution 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Design Schematic 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TPS60100 Charge Pump 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Capacitor Selection 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Dissipation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TPS76918 LDO Voltage Regulator 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

External Capacitor Requirements 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Dissipation and Junction Temperature 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Regulator Protection 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TPS3305-18 Supply Voltage Supervisor 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

References 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

List of Tables

1 Recommended Capacitor Values for Low Quiescent-Current Operation

(Pulse-Skip Mode) 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Recommended Capacitor Values for Low Output-Voltage Ripple Operation

(Constant-Frequency Mode) 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Recommended Output and Input Capacitors 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Recommended Capacitor Manufacturers 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 External Capacitor Selection 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Function/Truth Table 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - TPS76918, and the TPS3305-18

Designer’s NotepageSLVA082 - December 19991Powering the TMS320VC5402 Using the TPS60100,TPS76918, and the TPS3305-18Shawn T. Workman Mixed Signal Prod

Page 2 - Design Problem

SLVA0822Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18Design ProblemThe TMS430VC5402 is ideally suited for today’s portabl

Page 3 - TPS60100 Charge Pump

SLVA0823 Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18Design SchematicVOUTVOUTFBVINVINSKIPC1+C1-C2+C2-COM3V8ENABLEPGNDPGN

Page 4 - Capacitor Selection

SLVA0824Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18Capacitor SelectionThe TPS60100 requires only four external capacito

Page 5 - Power Dissipation

SLVA0825 Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18Table 4 lists the manufacturers of recommended capacitors. In most

Page 6 - Regulator Protection

SLVA0826Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18Table 5. External Capacitor SelectionPART NUMBER MANUFACTURER VALUE

Page 7 - References

SLVA0827 Powering the TMS320VC5402 Using the TPS60100, TPS76918, and the TPS3305-18During power-on, RESET is asserted when the supply voltage becomes

Page 8

IMPORTANT NOTICETexas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinueany product or servic