P =(V

V

)

I

-

´

D

IN

OUT

OUT

1 ms/div

V

OUT

V

IN

2.9 V

2.3 V

10 ms/div

V

OUT

I

OUT

50 mA

0 mA

13

TLV703

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SBVS305 – MARCH 2017

Product Folder Links: TLV703

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Copyright © 2017, Texas Instruments Incorporated

Although an input capacitor is not required for stability, good analog design practice is to connect a 0.1-µF to

1-µF, low ESR capacitor across the IN pin and GND pin of the regulator. This capacitor counteracts reactive

input sources and improves transient response, noise rejection, and ripple rejection. A higher-value capacitor

may be necessary if large, fast rise-time load transients are anticipated, or if the device is not located close to the

power source. If source impedance is more than 2 Ω, a 0.1-μF input capacitor may be necessary to ensure

stability.

8.2.2.2 Transient Response

As with any regulator, increasing the size of the output capacitor reduces overshoot and undershoot magnitude

but increases the duration of the transient response.

8.2.3 Application Curves

VOUT = 1.8 V, tR = tF = 1 µs

Figure 23. Load Transient Response

VOUT = 1.8 V, IOUT = 1 mA, slew rate = 1 V/µs

Figure 24. Line Transient Response

9 Power Supply Recommendations

Connect a low output impedance power supply directly to the IN pin of the TLV703. Inductive impedances

between the input supply and the IN pin can create significant voltage excursions at the IN pin during start-up or

load transient events.

9.1 Power Dissipation

The ability to remove heat from the die is different for each package type, presenting different considerations in

the printed-circuit-board (PCB) layout. The PCB area around the device that is free of other components moves

the heat from the device to the ambient air; see the Thermal Information section for thermal performance on the

TLV703 evaluation module (EVM). The EVM is a two-layer board with two ounces of copper per side.

Power dissipation depends on input voltage and load conditions. Equation 1 shows that power dissipation (PD) is

equal to the product of the output current and the voltage drop across the output pass element.

(1)