TPS745 datasheet(13/44 Pages) TI

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6.7 Typical Characteristics (continued)

at operating temperature range TJ = 25°C, VIN = VOUT(NOM) + 0.5 V or 1.5 V (whichever is greater), IOUT = 1 mA, VEN = VIN,

and CIN = COUT = 1 µF (unless otherwise noted)

Frequency (Hz)

100

10k

100k

10M

D001

VIN = 3.5 V

VIN = 3.6 V

VIN = 3.7 V

VIN = 3.8 V

VOUT = 3.3 V, IOUT = 500 mA, COUT = 2.2 µF

Figure 6-37. PSRR vs Frequency and VIN

Frequency (Hz)

100

10k

100k

10M

VIN = 3.9 V

VIN = 4.0 V

VIN = 4.1 V

VIN = 4.2 V

VIN = 4.3 V

VOUT = 3.3 V, IOUT = 500 mA, COUT = 2.2 µF

Figure 6-38. PSRR vs Frequency and VIN

Frequency (Hz)

100

10k

100k

10M

VIN = 3.5 V

VIN = 3.6 V

VIN = 3.7 V

VIN = 3.8 V

VOUT = 3.3 V, IOUT = 250 mA, COUT = 2.2 µF

Figure 6-39. PSRR vs Frequency and VIN

Frequency (Hz)

100

10k

100k

10M

VIN = 3.9 V

VIN = 4.0 V

VIN = 4.1 V

VIN = 4.2 V

VIN = 4.3 V

VOUT = 3.3 V, IOUT = 250 mA, COUT = 2.2 µF

Figure 6-40. PSRR vs Frequency and VIN

Frequency (Hz)

100

10k

100k

10M

VIN = 1.9 V, VOUT = 0.9 V

VIN = 2.8 V, VOUT = 1.8 V

VIN = 4.3 V, VOUT = 3.3 V

IOUT = 500 mA, COUT = 2.2 µF

Figure 6-41. PSRR vs Frequency

Frequency (Hz)

100

10k

100k

10M

COUT = 1 PF

COUT = 2.2 PF

COUT = 4.7 PF

COUT = 47 PF

VIN = 3.8 V, VOUT = 3.3 V, IOUT = 500 mA

Figure 6-42. PSRR vs Frequency and COUT

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TPS745-Q1

SBVS355B – JUNE 2019 – REVISED JANUARY 2021

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