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Description

1 Description

The TPS51219EVM evaluation module (EVM) is designed to use a regulated voltage ranging 8 V to 20 V

to produce 1.05-V output at up to 20 A of load current. The TPS51219EVM demonstrates the TPS51219

in a typical low-voltage application with D-CAP2™ mode operation. The EVM also provides test points to

evaluate the performance of the TPS51219.

1.1 Typical Applications

• Notebook computers

• I/O supplies

• System power supplies

1.2 Features

The TPS51219EVM features:

• D-CAP2™-mode operation with low-ESR output capacitance

• 2% tolerance 1.05-V output voltage

• 20-Adc, steady-state output current

• Support prebias output voltage start-up

• 500-kHz switching frequency

• SW1 for enable function

• Convenient test points for probing critical waveforms

2 Electrical Performance Specifications

Table 1. TPS51219EVM-630-001 Electrical Performance Specifications

Parameter Test Conditions Min Typ Max Unit

Input Characteristics

Voltage range VIN voltage 8 12 20 V

Maximum input current VIN = 8 V, IOUT = 20 A 3 A

No load input current VIN = 8 V, IOUT = 0 A 0.2 mA

Voltage range V5IN voltage 4.5 5 5.5 V

Maximum input current V5IN = 5 V, VIN = 12 V, IOUT = 20 A 20 mA

No load input current V5IN = 5 V, VIN = 12 V, IOUT = 0 A 0.5 mA

Output Characteristics

Output voltage, VOUT VIN = 12 V, IOUT = 10 A 1.05 V

Output load current, IOUT 20 A

Line Regulation: VIN = 8 V to 20 V, VOUT = 1.05 V,

0.2%

IOUT = 20 A

Output voltage regulation

Load Regulation: VIN= 12 V, VOUT = 1.05 V,

0.2%

IOUT = 1 mA to 20 A

Output voltage ripple At VIN = 12 V, VOUT = 1.05 V, IOUT = 20 A 15 mVpp

Output over current 27 A

System Characteristics

Switching frequency VIN = 8 V, VOUT = 1.05 V, IOUT = 10 A 500 kHz

Peak efficiency VIN = 12 V, VOUT = 1.05 V 89.3%

Full load efficiency VIN = 12 V, VOUT = 1.05 V, IOUT = 20 A 85.4%

Operating temperature 25 °C

SLUU818–April 2012 Using the TPS51219EVM-630 High-Performance, Single, Synchronous, Step-

Down Controller for Notebook Power Supply

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